Document 2q4ezzL4aDgrRJ41jzVVEk1p7

i PLAINTIFF'S EXHIBIT ET-32 INSTRUCTIONS FOR THE INSTALLATION, CARE AND OPERATION' _ --OF-- - Elliott ... - Type GY Mechanical Drive Turbines INSTRUCTION BOOK No. 60 i JUNE 1943 ! Elliott Company i ij 1 STEAM TURUINE DEPARTMENT--JEANNETTE, PA. ATLANTA ____ BOSTON mhmhhii IUJFKAM) ____ CHICAGO .......... CINCINNATI - CLfCVKLAND ... OKNVtiit_____ DfcTROIT -__ HOUSTON ____ KANSAS CITY LOS ANGELES DISTRICT SALES AND SERVICE OFFICES ...... JlanK-IIoweii Building One Federal Street JaekHon Building ....... 20 No. Warker Drive . Union Central Building Guardian Building Midland Havings Building ........ Dime Dunk Building M & JI Building m.(w.mhm Fairfax Building Petroleum Building MINNEAPOLIS .......... NKW YORK ............... PHILADELPHIA ___ Pittsburgh HAN FRANCISCO___ nr. loins ____ HKATTLK .................. TULSA____________ WASHINGTON, D.C. WILKF-S rUKRR ___ ............... . Raker Building ............ Tranajwfl.allon Building Morri* Building Friek Building Riiillo Building 1221 1/orunt Street Northern Life Tower McBirnoy Building Tower Building Seeumi National Rank Building J. L w INDEX SECTION I--GENERAL INSTRUCTIONS Pago. Shipment .......................................... ........................ .......................... g Unpacking ............................................................................................... 8 Foundation ...................................... ...................................................... 8 Installation ................................................................... .............. .......... 8 Turbine Piping ...................................... ............. ........... ,,............ . 8 Starting and Stopping............................................................................ 9 Operation, Routine Inspection....... ................... ...................;............ 10 Daily Inspection.................................................................... 10 Weekly Inspection-:......................................................... ,,. 10 Monthly Inspection............................... ...................... . 10 ` Yearly Inspection ................................................................ 10 Renewal Parts and Service Facilities........................................ . 10 SECTION II--DISASSEMBLY AND ASSEMBLY . General ............................. ................................. ............................... 1 i Casing ............................... .................................................................... 11 Packing Cases and Carbon Rings ......................................................... H Rotor Assembly....................................................................................... 11 Sleeve Bearings.......................................................... 12 Turbine Ball Thrust Bearing........................................................ 12 Normal Speed Governor and Linkage ;......... ............... ...................... 12 Overspeed Trip Governor and Linkage......... ............. ........................ LI Steam Chest ................................................................... 13 Steam Ring, Nozzle Ring and Reversing Bucket Holders ................... 13 SECTION m--ADJUSTMENTS AND CLEARANCES Nozzle Ring............................... ............................................................. 14 Turbine Ball Thrust Bearing...................................................... 14 . Sleeve Bearings .................................................... ................................. 14 Carbon Packing Rings...................................................................... 14 Normal Speed Governor.................. 15 Governor Lever..................................... .......................... ..................... 15 Governor Valve............................................... ................................. . 15 OverspeedlTrip Governor............................................................ .......... 15 rWatec Cooling of Bearings..................................... .. ...................... 15 Hand-Cces-ted Nozzle Valves .................... 15 Hand Speed Changer ............. ...................................... *..................... 16 SECTION IV--SPARE PARTS............................................................ . 16- T\7"0UR Elliott turbine has been carefully designed, accurately built, ;j thoroughly tested and inspected. Every effort has been made to place this unit in your hands in perfect condition, so that you may receive the many years of trouble-free service that have been built into it. When this turbine reaches you, it is expected that you will assume your full responsibility, by adequately protecting it during any period of storage, by providing skilled workmen for moving the unit to and upon its foundation, by aligning and piping it up correctly and by providing proper attendance for routine operation. This instruction book provides such cuts and text as will best illustrate and describe how the above may be accomplished. These re commendations are" based on many years of turbine building experience and should be followed as closely as possible to obtain the best operating results from your Elliott turbine. SPECIAL NOTICE Your turbine is protected against corrosion for the period of shipment and installation only. Remove slushing oil before starting up. Provide turbine casing drainage. IF NOT USED IMMEDIATELY Store in clean dry place, in an approximately level position, to avoid distortion. Open turbine, remove carbon rings from rotor and leave them off. Slush the rotor all over. (Refer to Section II, page II, item "Casing") Slush all finished exterior and interior parts with heavy, non-corrosive oil. Cover complete unit to protect from dust. Inspect periodically and renew slushing oil where necessary. Before starting, slight corrosion should be carefully removed with fine emery cloth. Before using, clean thoroughly with lint-free rags. INDEX SECTION I--GENERAL INSTRUCTIONS Page Shipment ............................................................... ................................. 8 Unpacking' ............................................................. ............................... 8 Foundation ............................................................................................. 8 Installation ........................................................................ ............... ;, 8 Turbine Piping ................................................. ............... ..................... 8 Starting and Stopping...................................... .................................... 9 Operation, Routine Inspection....... ........................................................ JO Daily Inspection......... ......................................................... 10 Weekly Inspection......... ,..................... ..................... . 10 Monthly Inspection....... ................................................. 10 -Yearly Inspection ....... ...................... ........................ . 10 Renewal Parts ami Service Facilities ............................... ................ 10 SECTION II--DISASSEMBLY AND ASSEMBLY General ................................................................................................... 11 Casing ..................................................................................................... 11 Packing Cases and Carbon Rings ................. .................................... 11 Rotor Assembly...................................................................................... 11 Sleeve Bearings ......................................................... 12 Turbine Ball Thrust Bearing.................................................................. 12 Normal Speed Governor and Linkage ;................................................. 12 Overspeed Trip Governor and Linkage.................................. !! Steam Chest ...................................... ............. . 1 Steam Ring, Nozzle Ring and Reversing Bucket Holders ............. . 13 SECTION HI--ADJUSTMENTS AND CLEARANCES Nozzle Ring..................................................................................... 14 Turbine Ball Thrust Bearing..................................................... .......... 14 Sleeve Bearings.................. 14 Carbon Packing Rings................... 14 Normal Speed Governor ..,........................ .................................... . IS Governor Lever............................................................................ IS Governor Valve................................................................. IS Overspeed Trip Governor........................................................... IS Water Cooling of Bearings............................................... IS Hand-Operated Nozzle Valves................................ 15 Hand Speed Changer.................................................... Id SECTION IV--SPARE PARTS............................................................... * Id No. Y*1 Y`2 Y.J Y*4 Y-5 Y*7 Y-S Y*9 Y-9A Y-10 Y-ll Y-ia Yl> Y-13A Y-14A NAME OF PART . Shaft ' __ Oil Filler and &ight~Cupt , Bekrlhg' * ' " Oil Ring Bearing Stop Deflector Ring, Packing Cate , - , Carbon Packing Ring Packing Ring Spring- Packing Ring Stop Eyebolt Pedestal. Stud " "''v . Exhautt End Bearing Pedaital Pedeital Caa First Wheel No. Y*14B Y*14C Y-15 Y-16A Y-16B Y-16C Y17A Y-17B Y-18A Y-1SS Y-20 Y*23 NAME OF PART Second Wheel Third Wheel Steam End Bearing Cate Flexible Support Firtl Row of Revolving Buckets Second Row of Revolving Buckets Third Row of Revolving Buckets First Row of Stationary Bucket! Second Row of Stationary Buckets First Row Stationary Bucket Holder Seoond Row Stationary Buoket Holder Nouie Ring Steam End Bearing Casa No. NAME OF PART Y*2JA Bearing Cate Cap Y23B Governor Cover Y24 Upper Half Casing Y20 Lower Half Casing Y*96 Sentinel Valva Y*97 Auxiliary Hand Valva Y16) Thru*! Bearing Cage Ring Y-1S4 Thrust Bearing Dowel Y155 Ball Thruit Bearing YJMA Thrvil Bearing Clamping Ring Y-1S6B Thruit Bearing Clamping Ring Y-157 Thruit Bearing Retainer Y-201 Steam Ring Y-2M Oil Bllnger W Water Cooling Chamber! Fig. 1--Section Through Type 3-CY Turbine No. Y-23B Y02 Y.JJ Y-34A Y-34B Y-35 Y-3S Y-37 Y-57 Y*64 Y*64A Y-77 NAME OF PART Governor Cover Overspeed Governor Trip Pin Trip Pin Adjusting Nut Adjusting Nut Look Staple Trip pin Lock Staple Trip Pin Auxiliary Weight Trip Pin Spring Trip Spring Washer Steam Chest Steam Chest Cover Valve Stem Guide Overspeed Trip Valve " No. Y7S Y*81 Y*82_ Y-83 Y-S5 Y-8S Y87 Y-92 Y-99 Y-170 Y*171 NAME OF PART Trip Valve Stem Trip Plunger Spring Trip Lever Connection Spring Trip Valve Pins Trip Lever Hand Trip Lever Knife Edge Block Trip Bell Crank Lever . Trip Lever Soring Spring Retainer Valve Stem Nut Pin No. Y-172 Y-173 Y-174 Y-17S Y-17S Y.177 Y-178 Y-173 Y-180 Y-181, Y-1U NAME OF PART Valve Stem Nut Trip Lever Connection Trip Lever Connection Pin Trip Plunger Pin Trip Lever Fulorum Pin Trip Plunger Resetting Lever Trip Lever Set Screw Resetting Lever Spring Resetting Lever Spring Pin Resetting Lever Fuiorum Pin Fig. 2--Section Through Overspeed Governor and Valve 'VNORMAL. SPEED GOVERNOR -33v Y-38k\YY--3lK-\ prYY--42A /-34AKY-29\\Yr30 |Y7 Y;23B 187 GOVERNOR VALVE AND BUSHING rY-l92 jrY-193 Y-26- MilViT-39y Y-42.// Y-457 Y-40'^ rY-59 /Y-60 ,Y-65'(^ /Y/Y--6626 \'t'!| " * -(C '"Y-64B Y-55 r^>Y-64 //Y- 5 6 Y7I88 v%4VH~-r.Wy SECTION DETAIL Of LEVER FULCRUM ^STEAM INLET STEAM STRAINER No. Y-23 Y-2JB Y-2fi Y-27 Y*28 Y-29 YOQ YOl Y-32 Y-JJ Y04A Y-34Q Y->5 Y-36 Y-J7 Y-JS YO? Y*40 NAME OF PART _ Steam End Bearing Case ___ Governor Cover -- Governor Cage Governor Cage Key Set Screw ___ Knife Edge Scat __ Governor Weight Assembly __ Governor Soring TTL7 Oversowed Governor Trip Pin Trip Pin Admitting Nut _ Adjusting Nut Lock Staple Trip Pin Lock Staple Trio pin Auxiliary Weight Trip pin Soring .. Trip Soring Washer _. Governor Collar Governor Spring Sleeve Governor Spring Adjusting Nut No. Y-41 Y-42 Y-42A Y-45 Y-47 Y-4S Y*S0 Y-51 Y-52 Y-53 Y-55 Y-5fi Y-YJ Y-5J5 Y-59 Y.40 Y-62 NAME OF PART Governor Spindle Ball Soaring Governor Spindle Ball Gearing Retaining Nut Governor Solmlle Bearing Retainer Governor Spindle Block Governor Spindle Nut Governor Spindle Becring Lubri cator Governor Spindle Block Pins Sot Screw Governor Levor Governor Lever Fulcrum Pin Set. Screw Steam Che*.l * Governor Valve Governor Valve Pins Governor Valve Bushing Governor Valve Stem No. NAME OF PART Y-64 Stcarn Christ Cover Y-44B Valve Stem Packing Bo* YYY.>-64M57 Ring Packing Packing Nut Volvo Store Locknuts Y*<tf Valve Stem Block Y-f,9 Go/ornor Lever Blocks YOR7 Thrust. Bearing Retainer Y-W Ball [tearing Inner Oust Washer Y-1W Governor Laver Fuforum Ball Bearing Y090 Bali (Jeering Outer Dust Washer Y-WIA Ball Becring Nut Y-19IB Lock Washer . Y-J92 Pipe Plug Y-193 3teem Strainer Cover Y.xn Gasket Y-19S Steam Strainer Fig. 3--Section Through Steam Strainer, Governor Valve and Governor / No. A 3 C D C NAME OF PART Cbam Che t Drain Steam Strainer 8l*woff Connection Casino Drain ' Leakjff from Packing Glands St)~m Seal C.nneotijn No. NAME OF PA .IT V Oil Orelna W 1 ). W*2 Cooling Wetor Connsethns W-. I EXHAUST END APPROX. DIA. ASBESTOS THREADS. LAY IN JOINT SEALER AS SHOWN. STEAM END Fig. 5 SECTION I--GENERAL INSTRUCTIONS SHIPMENT 1`ig. 1.) Shim under the turbine exhaust end The type CY turbine iiTlhipped as a complete unit, mounted on substantial skids and covered with an open framework of light crating. The purpose ot the latter is ttTindicate to the riggers the outside limits of the Turbine and provide a means of visually identifying the contents of the bearing pedestal (Y-13) and under the steam end bearing case flexible support (Y-1S) to bring the turbine to the proper height, level and in align ment with the driven apparatus. In no case should the pedestal studs (Y-I2) he changed from the factory setting. crate. It is not considered=to be a protective cas With the turbine at the proper height and in ing. All vital parts of the turbine are so protected final alignment slug up the foundation holding by the skids or adjacent members as to withstand down holts and dowel the exhaust end bearing considerable rough handling. Partial collapse of the open crating does not, in general, indicate damage to the turbine. ~ pedestal (Y-13) to the solepiate or bedplate. The work of alignment should he very carefully done as this is one of the most important steps in installation of the turbine and upon the accuracy UNPACKING of this- work will largely depend the degree of Remove the crating framework surrounding smoothness with which the unit operates. the turbine.and examine the unit for any damage due to very rough or improper handling in transit. If the unit, is not to be used at once, follow the directions contained in the_special notice attached to the turbine and to the_Turbine crating. This special notice is also shown on the index page of this instruction book. ' It the unit is to be installed at once, remove the coverings from the variousopenings and carefully clean the slushing oil from the several parts. With the turbine still on the skids move it to the site of the foundation and there remove the skids. TURBINE PIPING No part of the turbine installation is more im portant, for future successful operation, than a well-designed and vve.ll-executed piping jcl. There are two definite, objectives in a good piping job: to prevent the heated piping fruin imposing strains on the turbine casing and thus affecting the alignment; to so connect and drain the tur bine steam and exhaust lines that dry steam is furnished to the turbine and water accumulation in these pipe lines is prevented. FOUNDATION The high-pressure steam supply line should, he taken off the top of the steam header at a point as The area and depth of foundations for mechani near the turbine as possible. Drain this header by cal drive units are, to a considerable extent, means of a steam trap, connected near the turbine dictated by the type of the driven apparatus. A take-off. As an alternate a steam separator may minimum requirement for a foundation for these be put into the high-pressure turbine supply line turbines is considered to be one with sufficient to prevent water entering the turbine and causing bulk of concrete or steel to absorb minor vibra expensive eroding of the turbine buckets. tions and to prevent synchronous vibrations being Lead the turbine steam line through suitable set up in the concrete or steel building members. expansion bends to a conveniently located turbine Allow provision for accessibility to all parts of. 'throttle valve preferably located in a vertical line. both the turbine and the driven apparatus. Proceeding from lids point, terminate the supply INSTALLATION line with a turbine steam liiie coupling flange which must be solidly anchored to the floor or In some cases the driving half of the coupling foundation, leaving the balance of the line free to is mounted by the manufacturer of the turbine move or expand as required. The connection and in other cases it is motmted by the manufac between this flange and the turbine inlet flange is turer of the driven apparatus, or the purchaser. to be made without forcing the pipe line in any In any case the coupling should be carefully direction whatever, in order to make a satisfac heated and shrunk onto the: turbine shaft. Driving tory joint. This connection may be considered the coupling on with a hammer should never be entirely satisfactory if the supply line, when attempted as the force of the hammer blows will heated to operating temperature, does not kick damage the turbine thrust-bearing. out of line with the turbine inlet flange when the Move the turbine upon its foundation, and set it bolting is withdrawn. level and in alignment with the driven apparatus Cover the turbine supply line with a good grade by aligning at the coupling halves. (Refer to of pipe covering. The turbine exhaust flange should be connected STARTING AND STOPPING to the turbine through a suitable flexible copper or other type of expansiorT^int. It this line leads (Refer to Fig. 1) to other piping, an exhaust line valve must be installed and a suitable steam trap should be provided at the low point'in this line to prevent an accumulation of water "in the turbine casing. An exhaust line connection to the turbine which does not contain a flexible joint and a continuous Prepare the turbine for the initial start-up as follows: 1--Remove the governor cover (Y-23B), bearing case cap (Y-23A) and pedestal cap (Y-13A). 2--Remove both upper and lower halves of ly trapped drain is a constant menace to proper turbine operation, and the saving effected by their both bearings (Y-3) for inspection and cleaning. omission cannot be reasonably justified. Refer to Fig. 4 for the miscellaneous piping connections to this turbine, all of which are identified and their use described below. 1--"A"--]4" pipe tap--steam chest drain-- connect through high-pressure piping and a globe valve, located near turbine ' throttle valve, to open drain. Open, just prior to starting, ter' drain water from steam chest. Close when water ceases to emerge from drain Jine. When emergency valve is tripped, close turbine throttle valve, open drain "A" to relieve steam chest pressure, reset emer gency trip with reset level; close drain "A"; open throttle valve to start turbine. 2--"B"--1* pipe tap on rear side of steam chest--blow-down connection from steam strainer space. Blow down as directed . under "Routine Inspection." 3--"C"--l/i" pipe tap--casing drain--con nect through valve to open drain; open just prior to starting^turbine; close when casing is fully drained. Open when tur bine is shut down and exhaust valve is 3--Carefully clean both bearing oil reser voirs and journals and replace lower halves of bearings. 4--Fill reservoirs to overflow height with "heavy medium" turbine oil having a vis cosity of 230--330 seconds Saybolt at 100 deg. F, Lubricate coupling if necessary. NOTE:--If turbine is used in connec tion with a reduction gear and the bear ings are forced feed follow directions given in gear instruction book for lubrication. 5;--See that lower halves of bearings are flooded with oil and that ball thrust bear ing (Y-185) is likewise flooded with oil. Fill governor spindle bearing lubricator (Y-50, Fig. 3) with "light" turbine oil. 6---Replace all of the above parts, insert dowels and pull down bearing cap nuts securely into place. Turn unit over by hand to see that everything is free. 7--Open steam chest drain "A" and casing drain "C." If overspeed trip valve (Y-77, Fig. 2) is closed, reset by pulling back reset lever (Y-178). 8--When above drains cease to bleed water, closed. 4--"D"--3/*' pipe tap--leakoff connection from carbon packing rings--connect to open drain without valve. Be sure that partially open throttle valve and allow turbine to run at about 800--1000 R.P.M. for 10 minutes, meanwhile observing general operation of the unit. no back pressure isnapplied to this line. 9--Bring the turbine slowly up to speed on 5--"E"--j4 pipe tap--steam seal for car the throttle valve, until the governor bon packing rings--Furnished only takes hold, then open the throttle valve when turbine is operated under vacuum." wide. Check the speed. The full-load Connect to a source of. steam supply speed is stated on the turbine name plate. through a throttle valve. Admit steam to 10--Shut down the unit by striking the hand glands until a wispTif steam leaks out of trip lever (Fig. 4) sharply, either with "D." This prevents air leakage inwardly. the hand or the foot. (Not necessary to pipe up "D" on con 11--Close throttle valve--open steam chest densing turbine). drain "A," and when steam chest pres 6--"W"--Yi" pipe taps---water cooling con sure has been reduced reset overspeed nections to the turbine bearings--located trip valve as before. Open throttle valve on the trip reset lever side of the turbine. and again bring turbine up to speed. . Connect with a source of cool water 12--With one operator reading speed on through a stop cock and a globe valve an accurate hand tachometer another into W-l; out of W-2; into W-3; out of should push against the force of the gov W-4 through a one-foot head loop to an ernor, by firmly grasping both ends of open drain. (Shown diagrammatically in the governor lever (Y-53, Fig. 3), until Fig. 4). Adjust stopcock so that a mod the speed rises 15 per cent or the unit erate flow of water passes into the open trips out. Tripping will occur at 10 to 15 drain with globe valve wide open, Then per cent above operating speed. Close V. operate by full opening or closing globe throttle valve and reset trip as before. valve when turbine is started or stopped. 13--Unit is now ready for service. --9-- 14--Routine starting^is accomplished by checkin" oil levels, opening the drains and bringing theTurbine up to speed on tile throttle. Close drains when they bleed .'team insteaxT of water, 15--When shutting down, trip the overspeed valve by hand or close throttle valve. Open the drains." OPERATION, ROUTINE INSPECTION Tiie.se machines requinra minimum of operat ing attention since they Sire substantially built to withstand the severe serfjee conditions to which mechanical drive turbines are usually subjected. Providing adequate lubrication is the one really essential and important operating detail. How ever, any routine system" of inspection which anticipates possible opctHTlng difficulties before they reach serious proportions is manifestly desirable, and such a routine system is outlined beiow. The adoption ofzihis system of routine inspection with such modifications or amplifica tions as are necessary toTTT it into the operating schedule of your particular unit is recommended. DAILY INSPECTION 1--Check oil level on afijiearings. 2--Fiii governor oil cup once every S hours. 3--Check bearing temperatures by hand. 4--Check smoothnesswof operation by hand and note any change. 5--Note any unusual noises or conditions and check frequently. 6--If shutdown is made daily, trip emer`' gency valve by striking hand trip lever. 7--Check speed of unit. WEEKLY INSPECTION 1--Blow down steam'strainer connection "IT (Fig. 4). _ ^ 2--If not on continuous running schedule, trip emergency valve by overspeeding the turbine, as previously-described. 3--Oil governor and ovefspeed trip linkage sparingly with oil can. YEARLY INSPECTION 1--Before disassembling or assembling any of the various units of your turbine, carefully read Section If of Ibis book. 2--Check all clearances and adjustments as directed under Section Ilf. Replace any wearing parts that may lie too badly worn for further use. 3--Dismantle speed regulating governor and linkage (Fig. 3), and check for lost motion or worn parts. Clean thoroughly, lubricate and reassembly. Adjust for correct speed. 4--Dismantle overspecd trip governor and , linkage shown in P'ig. 2. Check for ease of operation; dean and lubricate sparingly. 5--Examine governor valve and hushing (Y-5X, Y-OO--Fig. 3) and rlean. flrind in valve if unevenly worn. Check governor valve stem ring [lacking (Y-f>5) and re place if necessary. Be sure packing does not bind when reassembled. 6--Clean stem of overspecd trip valve (Y-78, Fig. 2). 7--Check turbine ball thrust bearing CY-185, Fig. 1) for end play. Flush out with a pressure stream of clean oil. 8--Check operation of sentinel valve (Y-%, Fg. 1). , 9--Lift casing and inspect both the moving and stationary blading; dean on I any accumulation of scale and dirt between the buckets. 10--Cheek carbon rings to sec that they arc not fouled by an accumulation of scale or rust in packing cases. Carefully remove rings, clean and reassemble. CAUTION : --Read Section II. 11--When again in operation check turbine speed, tripping speed and general opera tion. 12--ft is a good idea to have an Elliott ser vice engineer inspect your turbine once each year. MONTHLY INSPECTION 1--Change bearing oil and clean oil reser voirs. If in a very dirty atmosphere make this a weekly duty. 2--Remove governor cover and bearing caps and make visual inspection of governor parts and bearings. Clean as necessary. 3--Check governor linkage and overspecd linkage for lost motion. 4--Remove steam strainer and clean. If very dirty, make this a Weekly operation. 5--Oil governor lever fulcrum ball bearings, (V-189, Fig. 3). 6--Check coupling between turbine and driven apparatus for looseness or wear; if this is a lubricated_coupling, check the lubrication. RENEWAL PARTS AND SERVICE FACILITIES The Elliott Company maintains a staff of field engineers to supervise the installation and start ing up of new units. They are also available fur inspecting, adjusting, ordering repairs, and super vising or installing repairs on older units. Their services are available at any time, usually cm very short notice. In ease of emergency their expert knowledge may be of great assistance in getting the unit back in service without delay. Order turbine repair parts from the Elliott Company, Steam Turbine Department, jcnmieifc, i'a., or send the order through the nearest district office when time is available, A list of district offices is given on page I, . --10-- SECTION II--DISASSEMBLY AND ASSEMBLY GENERAL Disassembly and assembly of the various parts of your turbine should be a familiar subject to your operating" anti maintenance personnel, in order that they may accomplish the work or routine inspection and be Capa Itie of checking' and adjusting those parts which may require this service. " liange bolting, starting nearest the shaft on both sides and working outwardly. 5--Coat both the horizontal and vertical joints of the carbon packing cases with joint sealer. CAUTJON :--Do not allow sealer to run rlown into carbon ring " spaces as it will prevent the rings from scaling on the side walls. Place upper half packing cases in posi- Much of the design of this unit is so clearly shown in the cuts that no description of dis assembly or assembly is considered necessary, lit and insert dowels in horizontal tlange and pull up horizontal flange holts tight. Pull up bolting on vertical split. general, only such descriptive matter is given under this heading, as if necessary for future replacement of a wearing part or the checking and adjustment of some clearance. Any future major replacement, such_ as wheels, buckets, shafts, etc., or any future major overhaul should he done under the supervision of an Elliott Com pany service engineer or aTlhe. factory. PACKING CASES AND CARBON RINGS To remove the carbon rings and their retaining springs (Y-9, Y-9A and Y-10), lift the upper baif packing cases (Y-8), as previously described. Un honk and remove the circular spring assembly surrounding each three-piece, carbon ring, after which the separate pieces of (he ring" may be. CASING removed by rolling around the shall. CAUTION : --Keep the three parts of each ring and spring To remove the rotating clement or to inspect assembly of each ring together so that they may the interior of the turbine, the upper halt turbine be replaced together in I lie same packing case easing (V-24, Fig. 1) must be lifted. First remove groove, from which they were removed. both the vertical and horizontal bolting on both -To reassemble, clean out packing case grooves upper half carbon ring" fracking cases (Y-8); thoroughly, clean shaft and rings with kerosene. break the joints by strikingysharply with a lead Place springs around shaft and hook ends to hammer and carefully lift the cases straight up gether. Starting with that segment of the ring until they clear the carbon rings. Next remove the into which the dowel fits, force the proper seg turbine cover bolting, break the horizontal joint ments under their respective springs. CAUTION : ana lift the cover upward imtTl it clears the wheels. --He sure that those sections which abutt each Cover (Y-24) weighs approximately 225 ib. other are marked with similar markings so that To reassemble:-- --^ 1--Scrape and carefully clean all exposed they are reassembled mark to mark. Reassemble gland cases as directed above. joints on both the upper and lower halves or the turbine casing (Y-24 and Y-25), as well as those on the upper and lower halves of the packing cases (Y-8). Do not allow scrapings to fall into the ROTOR ASSEMBLY The rotor assembly consists of the shaft, upon which arc mounted the wheels, the driving half lower halves of the packing cases be couplings, slim, rs, ball thrust bearing assembly tween the carbon rings and the walls. Blow out with air if available. and the nor ml speed governor assembly, To remove the rotor from the casing, disconnect the 2--Apply a good coat of graphite and oil mixture, or an equally good steam seal ing compound, on the horizontal flange of the lower half turbine casing, and in it lay two asbestos threads (approximately 1/52" dia.) as shown in Fig. 5. CAU TION :--Do not allow threads to be too near studs as clearance holes in cover may expose them; he sure that thread ends do not extend into the carbon pack turbine from the driven machine at the coupling and remove the upper half turbine casing (Y-24), the upper halves of both carbon ring packing cases (Y-8), the pedestal cap (Y-13A), the gover nor cover (Y-23H) and the steam end bearing case cap (Y-23A). Remove the top halves of both sleeve bearings (Y-3). Refer to Fig. 3. Disconnect the governor spindle (Y-42) from the governor lever (Y-53) as ing case horizontal splits. follows: Remove the ball bearing nut fV-191), 5--lanver the upper half casing over the tur governor lever set screw (Y-5<5) (mark so that bine wheels and shake to a solid seating. identical replacement can be made) and drive I 1 imei'l dowel'); pill) down oil horizontal governor lever fulcrum pin (Y-55), together with lower hall bearing assembly out of bearing case Remove the overspeed governor trip pin (Y-32) housing (Y-23). Remove governor spindle lubri and the complete pin assembly by first taking out cator (Y-50), governor spindle block pin set tiie U-shupcd adjusting nut lock staples (Y-34A screws (Y-52) and pins (Y-51). Swing governor and Y-31J5), located at each end of the trip pin. lever away from turbine, pivoting on governor Then unscrew the trip pin adjusting nut (Y-33), lever blocks (Y-69). Governor lever may then be after which the trip pin spring (Y-36) and trip lifted off and laid aside. ' pin (Y-32; will come out. If there are auxiliary Lift rotor straight upward (weight approxi weights (Y-35) in your machine, these may now mately 250 lb.) being sureJto protect shaft jour be removed. nals and carbon rings frdW damage. Lay rotor Having removed all parts of the governor aside and prevent from rolling by blocking under assembly, the governor cage hub set screw (Y-28) wheels. CAUTION :--While rotor is out of cas should now be removed and the hub in the ing keep ball thrust bearing assembly tied up in vicinity of the set screw should be evenly heated clean rags to prevent the entrance of dirt. with a torch, after which it may easily be bumped When lowering rotorTinto position shake off the shaft. CAUTION:--In heating the gover lightly so that wheels will not engage the revers nor hub, avoid heating the shaft as much as ing buckets while descending. Cease lowering possible. If a puller is used, be sure to pull on the when carbon rings are about to enter their re hub rather than at the end of the governor cage. spective slots. Be sure that- rings and slots are Next, remove the ring (Y-203) by splitting it. lined up before final lowering and that the slots Then remove the three-piece retainer (Y-187) are free from scale or rust.'CAUTION:--See that after which the hall bearing assembly, including ball thrust bearing positioning dowel (Y-184-- the housing, may be driven oft the shaft. Fig. 1) is in position and that the clearance Remove the old bearing from its housing and between the first wheel shroud (Y-16A), and insert the new one; put on the clamping ring nozzle ring (Y-20), is approximately 1/16 inch. (Y-186A) and secure it witli the plate screws, making sure that the holt head locking wire is SLEEVE BEARINGS Removal of the sleeve bearings (Y-3) is readily accomplished by removing1 the bearing caps (Y-23A and Y-13A). Lift out top halves and roll out bottom halves, allowing shaft to rest on packing gland cases. ~ When replacing make sure that oil rings are correctly placed and free to turn, that the posi tioning dowels (Y-5) are in place and that the bearing is flooded with oil._ If high spots show in the bearing, scrape them out lightly. - threaded through the bolt heads to keep them from backing out. Slip the assembly on the shaft and tap it into place by means of a sleeve which strikes the shaft race of the ball bearing. Drive the bearing into a solid seating against the shoulder on the shaft. The three-piece bearing retainer (Y-187) must fit tight between the bearing (Y-185) and the shoulder on the shaft nearest the governor cage. Obtain this fit by grinding off the end of the retainer next to the bearing. The retainer pieces should be tapped into place to insure a tight fit between the bearing and the shoulder on the shaft. Measure the depth TURBINE BALL THRUST BEARING The turbine thrust bearing is located in a houring composed of the thrust bearing clamping ringo (Y-186A and Y-186B) and the bearing cage of the recess in the governor cage at the point it slips over the retainers to determine the location of the shrink ring (Y-203). The ring should be heated quite hot to insure adequate expansion for the heavy shrink allowed in the ring fit. Next the ring (Y-183). It is held in position ami located governor case Inth may he slightly heated and axially by dowel pin (Y-184). To remove this bearing the rotating element must first be lifted from the turbine as previously described. Rcler to Fig. 3. Before removing the governor spring,adjusting nut (Y-40), measure the distance from the end of this nut to a convenient point on the governor cage (Y-26), so that on reassembly the nut can be put back into its exact previous slipped on the shaft. Be sure that the. counterborc in the bub covers the ends of the retainer (Y-187) and that the emergency trip pin holes in both the shaft and governor case hub line up. Replace set screw (Y-28), prick punch it to hold in place and replace the governor parts as described below. CAUTION:--Keep the ball bearing clean and flood with oil before use. setting. Having removed governor adjusting nut (Y-40), grasp the governor spindle (Y-42) and pull outward, which will allow removal of the NORMAL SPEED GOVERNOR AND LINKAGE governor weights (Y-30), the governor spring This mechanism is shown in complete detail in (Y-31), and the complete spindle assembly. Fig. 3; Before rcassemhlying clean all parts and --12-- tlic*. shaft end carefully, ft any hums arc present sharply to see that It works freely. Replacement they should he removed. of the linkage is clearly shown in Fig. 2 and needs The governor spindle assembly consists of the. no description. governor spring sleeve _(Y-39), the governor spindle hearing retainer tjY-45), the governor STEAM CHEST spindle hall bearing (Y-41), and the governor spindle (Y-42). This assembly may be taken apart for inspection' or replacement of the hail bearing by removing the governor spindle bear ing retainer (Y-45). When this nut is replaced and pulled up tight be sure that the bearing turns freely and has no perceptible end play. Lock the Refer to Figs. 2 and 3 for sections and Fig. 4 for external view ot steam chest. The steam chest is composed of three chambers through which the steam Hows as follows: steam passes from the steam inlet through the steam strainer basket (Y-195), then through the gover nor valve and hushing (Y-58 and Y-60), and from nut by prick punching tlieaslge of the nut head into saw cut on the sleeve. -- this point, through the overspeed trip valve (Y-77, Fig. 2) into the steam ring and thus into Place the governor collar^ Y-38) mi the end of the spindle assembly and slide this entire mech anism into the shaft end. Insert governor weights (Y-30) and in this operatiorrsce that there is no scale or rust between the governor weight knife edges and the knife edge seats (Y-29). Next, insert governor spring (Y-3J) and partially screw in adjusting nut (Y-40). At this point pry up each the turbine nuzzles. All of these parts are housed in one casting which in turn is bolted to the steam ring of the turbine. To inspect the strainer basket, it is only necessary to remove the cover (Y-193, Fig. 3), after which the basket can be Ia Iren completely out and cleaned. To inspect the governor valve and the overspeed trip valve, the governor lever (Y-53) and the trip bcllcrank lever weight with 'a fulcrumed screw driver to see that (Y-92) should he removed, then the steam chest the governor operates freely. Screw up on adjust ing nut to the setting which has been previously cover (Y-64) may be taken off, exposing both the speed regulating governor valve and the over registered by measurement: To reassemble governor lever (Y-53), engage the lower end governor lever blocks (Y-69) into the governor valve stem block (Y-58), Swing the lever into position with tile governor spindle block (Y-47) between the upper lever fork. From tlie under side tap the governor lever fulcrum pin (Y-55), which is assembled with ball bearings (Y-1S9), washers (Y-188 and Y-190), lock washer (Y-191B), and nut (Y-191A) up through the governor lever and assemblewasher (Y-188), ball bearing (Y-189), washer (Yt190), lock washer speed trip valve. The governor valve (Y-58) may he removed by pulling the valve straight out ward. In the event that the valve hushing (Y-60) is to be removed, it must be pulled mil. with a [Hiller prepared especially for this service. To reassemble governor valve bushing, [dace hush ing in the steam chest and drive into position witli a bar of nonferrous metal and punch the edge of the steam chest so that the bushing cannot come out. The governor valve can be replaced and reassembled by sliding the governor valve stem through the packing ring (Y-65). Reassemble the (Y-191B), and nut (Y-191A) ou the protruding end, in the order named. Screw' governor lever set screw (Y-56) into its previous position. Insert governor spindle block phis (Y-51) and set screws (Y-52) into position, Replace governor spindle mit (Y-48) and oil cup (Y-50) into posi tion. CAUTION:--After governor linkage lias steam chest cover (Y-64). This is a metal-tomctal joint with the steam chest (Y-57), and is made up with graphite and oil, first being sure that the joint surfaces are clean. J'lace dowels in position and pull down strongly on the holding down holts. been disassembled and reassembled check valve travel as described in Section III under ``Adjust STEAM RING NOZZLE RING AND ments." REVERSING BUCKET HOLDERS (Fig. 1) These parts form the path of the high-pressure OVERSPEED TRIP GOVERNOR . AND LINKAGE steam through the turbine. The bucket holder (Y-18A and Y-18B) and nozzle ring (Y-20) may be removed by working on the inside of the Refer to Fig. 2 which shows the details of this turbine after the rotor is lifted, this complete mechanism. In replacing the trip pin (Y-32), be assembly may also be removed by removing the sure that the trip spring washers (Y-37) are in steam chest, the steam end bearing case, and position since they are a part of the adjustment flexible support (Y-15), after which the steam for determining the speed at which the unit trips. ring can he unbolted from the lower half turbine I'hu'c II `duple wires (Y*34A and Y-34B) in pusi- case ami the entire assembly lifted out. All of nm mill wllli li screw driver placed >,ii trip pin these sleam joint are nietal-to-molid and are made adjusting nnt (Y-83) press the pin outward up with steam joint sealer when reassembling. --13-- SECTION III--ADJUSTMENTS AND CLEARANCES NOZZLE RING (Y-20, FifTl) Adjustments--None. ` Clearances--Normally 1/16" between nozzle ring' (Y-20), and shroud of-first row of moving1 buckets (Y-16A). Minor variations permissible. Obtained by feeler gage measurement. Check whenever rotating element,'nozzle ring-, or steam ring is removed from the7 turbine and is re assembled. To vary, change locati'onrof positioning dowel (Y-184) in thrust bearing cage ring (Y-183). Excessive bearing clearance may lead to tur bine vibration. Clearances in excess of ,015 are generally considered (excessive. To correct excessive clearance replace the bearing. When putting a new bearing into ser vice, place it in position, clamp bearing cap lightly and run for 5 or 10 minutes or until bearing becomes hot, Remove the bearing and scrape high spots, repeating this operation until full length contact is obtained after which the bearing may be put into permanent service. TURBINE BALL THRUST BEARING (Y-185, Fig. 1) ' CARBON PACKING RINGS (Y-9, Y-9A, Y-10, Fig. 1) Adjustments--This thrust bearing locates the Adjustments--The shaft under these carbon axial position of the rotating element with respect . rings is prepared with a hard non-corrosive sleeve to the stationary parts. It carries no radial load. which makes possible very close running clear To change the axial position of the rotating ele ances; All rings, when newly installed must be ment remove bearing case cap (Y-23A), and turn "run in" to achieve the highly polished, glossy the thrust bearing cage ring (Y-183) into a new surface required for a minimum of wear. These position so that the present dowel hole will not rings are impregnated with oil for lubricating register with the hole in the cap. Make sure that purposes during the "run in" period and may the oil drain hole in the thrust bearing clamping smoke considerably during the first 24 hours of ring (Y-186A) is on a vertical and below the service, which condition need give the operator shaft. Block the rotating element into the desired no concern. position and replace bearing^case cap (Y-23A). At times steam leakage along the shaft is Drill a new J4" dowel hole into the thrust bearing caused by improper seating of the ring against cage ring (Y-183), using Ihghole in the cap as a tlie sides of the packing ring case grooves due to drill jig--do not drill deeper than into ring. deposits of foreign material between the rings and Replace dowel. their side seats. The only remedy is to clean out Clearances--Large radial clearance--it carries this foreign matter. no radial load. Negligible axial clearance or end So called "fitting" of carbon rings in the field, float--not adjustable--if excessive, replace ball the operation wherein the butt ends of the seg bearing. ments of a ring are filed down to reduce the bore of the complete ring, can only be considered SLEEVE BEARINGS (Y-3, Fign) satisfactory as an emergency measure. When ' rings arc "fitted," prepare a mandrel 3.000" diameter and use this mandrel as a guide for the Adjustments--When necessary scrape high horc of the ring segment while fine sand paper or spots lightly to give contact the full length of the a file is held or clamped radially against the man bearing. The sleeve bearings are interchangeable. drel and thus hy axial movement of the ring Bearing halves are positioned relative to each segment the butt end is worn down radially to other by two blind dowels on the horizontal split reduce the bore. and are positioned in the casing by locating pins The most satisfactory correction is to replace (Y-S). Rebabbitting of these_bearings should not the ring with a new one. be attempted in the field--return them to the Clearances--The cold clearance between new factory for this operation. rings and the shaft is .001" to .003". Worn in Clearances--These bearings are factory fitted clearances may he considerably higher with satis to give a cold clearance of .002" to .006" larger factory results. Measurements of ring clearances than the shaft. Check at long intervals (unit not are unreliable without recourse to proper "go" running) by placing a short strip of soft fuse wire and "no go" gages. In the final analysis ring fits in center of bearing on lop and shaft and clamp are always satisfactory if steam does not leak out ing bearing into position. Measure thickness of of the packing ease along the sliafl, and even a flattened fuse wire by micrometer. light blow here is not considered nnrcasoimlde, --14-- NORMAL SPEEETGOVERNOR (Y-40, Fig. 3) ' Adjustments--The turbine nameplate states the normal speed at which your turbine should operate under lull load artel contract steam con ditions. Any substantial variation from these con ditions should only be attempted after consulting the nearest Elliott Company district office. Minor variations of speed adjustment to suit minor changes in operating loads are obtained by tightening the governor spring adjusting nut (Y-40) for an increase in speed, and slacking off on this nut to decrease the speed. The governor spindle "ball thrust bearing (Y-41) is designed to take the thrust of the gover nor valve and is sclf-aligmftg by reason of the spherically seated collars orrcach end of the bear ing. The end play in this bearing should be very slight but at all times the bearing must rotate freely. There are no adjustments on this bearing. Clearances--The clearance-between the gover nor spring sleeve (Y-39) and the shaft end should be an easy sliding fit. Governor spindle blockpins (Y-Sl) arc to be an easy fit in spindle block (Y-47). Governor lever blocks (Y-69) should be free fitting in the valve stem block (Y-68). With.unit not running measure from the inside valve stem lock nut (Y-67) to the valve stem packing gland hull of the valve cover (Y-64JJ). Record this dimension. Loos en all tlie lock and check nuts (Y-67) and turn valve stem clockwise until the valve scats. With valve in this position screw in side lock and check nut against valve stem block (Y-68) and again measure the above distance. The difference between the above two measurements is the governor valve travel. Reset as before. Clearances--Governor valve stem (Y-62) must at all times move freely in packing-(Y-65). After screwing up on packing nut (Y-66) try movement of valve stem in packing. OVERSPEED TRIP GOVERNOR (Y-32, Fig. 2) Adjustments--The speed at which flic over speed trip pin (Y-32) flies out and trips the over speed valve may be increased by removing U staple (Y-34A) and screwing up adjusting nut (Y-33). If this is insufficient add washers (Y-37). To reduce the speed reverse this process. CAUTION:--Replace U staple and check speed carefully as described in Section,I. GOVERNOR LEVER (Y-53, Fig. 3) . Adjustments--When this lever has been re moved and replaced, set the center hub of the lever approximately central between the two ball bearing housings and insert set screw (Y-56). With the turbine operating, loosen set screw and move governor lever (Y-53), first towards one ball bearing and next towards the other. At the point where vibration on governor oil cup (Y-50) is a minimum tighten set screw. Clearances--Linkage pins (Y-174, Y-175, Y-176) and plunger (Y-177) are to be free sliding fits. Overspeed valve stem (Y-78) about .010* clearance in bushing--clean out scale if sticky. Maintain the 1/16* clearance shown between trip pin (Y-32) and trip lever (Y-85). WATER COOLING OF BEARINGS Hook up as shown on Fig. 4. HAND-OPERATED NOZZLE VALVES . (Y-97, Fig. 1) (Fig. 4) Governor Valve (Y-58, Fig. 3) Adjustments--The travel of the governor valve should be the minimum required to enable tbo turbine to carry full load under the lowest steam pressure condition. In no case should this travel be greater than 5/8*. The factory setting may be determined and recorded as follows: Adjustments--Extra banks of nozzles, when ordered, arc furnished to increase the turbine power for an overload condition, to carry normal full load with a reduced steam pressure, or for part-load steam economy, Operate either full open or full closed. For maximum efficiency operate as much as possible with hand valves closed tightly. Clearances--None requiring checking. f -IS- HAND SPEED-CHANGER (Figr6) Adjustments--Done atrthc factory and should not require further attention. It, however, gover nor valve or valve stem (Y-62) is being replaced, record original dimensions" "A" and "It," from actual measurements onflu: turbine. Then make new setting as follows : With turbine not running, close governor valve by'Scrcwing stem inward until valve is on its seatTThcn set distance "A," and pin checknut in placer Unscrew valve stem until checknut is againstrvalve block. Assemble handwheel and locknut, and set distance "B." Pin handwheel in place. Operation--With vaivcrslem in latter position (checknut against block), adjust compression of main governor spring untTTthc speed of the tur bine is the maximum desired. The speed may now he decreased by turning the band wheel clockwise until stopped by locknut_and block. For any intermediate position, the turbine speed is in creased by turning the handwheel counter clockwise, and decreased-by turning clockwise, locking stem in place by knurled locknut. Any required operating speed beyond the range of the speed changer must be obtained by shutting down the turbine and readjusting the compres sion of the main governor spring. Dual Drive Units--For "dual drive units, adjust speed changer to give a Turbine no-load speed slightly less than the speed of the motor at full load. If motor fails and turbine takes the load, bring turbine speed up ta_ normal full-load unit speed with the speed changer. When motor again takes the load, reduce turbine speed with hand speed changer. Fig. 6 No. . NAME OF PART Y$ Gwrnftf V*W 6Um Y-m Stop Nut Y.J97 Chock Nut Y-m V.lv. SUm Block Y-m Knurled Nut Y-200 Handwheel SECTION IV--SPARE PARTS In order to insure long peTiods of uninterrupted service, freedom from shutdown clue to mishaps of operation or improper usage, it is recommend ed that the following spare parts be carried:-- (FIG. 1) 1 Sleeve Bearing, Y-3. 1 Set (4)' Carbon Rings" and Springs, Y-9, Y-9A and Y-10. 1 Turbine Ball Thrust Bearing, Y-185. 1 Thrust Bearing Retainer, Y-187, 1 Oil Slinger, Y-203. (FIG. 2) 1 Emergency Trip i'in Assembly, Y-32, Y-33, Y-34A, Y-34B, Y-35, Y-30, Y-37. . 1 Additional Trip Pin, Y-32, 1 Set Trip Linkage Pins, Y-174, Y-175, Y-17A ] Reset Lever Pin, Y-182. 1 Knock-off Lever Latch Plate, Y-K7. I Set of Springs, Y-81, Y-82, Y-99, Y-180, (FIG. 3) 1 Set Governor Valve Stem Packing, Y-65, i Governor Spindle Assembly, Y-39, Y-41, Y-42, Y-42A, Y-45, Y-47. 1 Governor Sleeve Collar, Y-38. 1 Set Governor Lever Block Pins, Y-.Sl, I Set Valve Stem Block Slides, Y (>'K f t , ,, 5 ` . . .------------------------- 4'-3g~OVERALL LE W tH-------------------- ------------J I T O OF B E A R IN G S ,_____________________ _______ ____________ _________ J ? allow this space FOR REM OVING COVER