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RIGID COUPLINGS

Contents:

1. General2. Deslga1. Settlng up4. Supplenents : SectlonaL drawlng

1. General

Tbe shaft of turblne and compressor sets are trostry rlglil.ycoupled. l{e use frange coupllngs forged lntegra],ly wltb theshaft end and bolted together.The couprlngs are dlnensloned so tbat they have about thesame strengtb as the shafts whlch they couple. rD nor-maIoperatlon the torque ls transrnltted by frlction, tbe sbearreslstance of the coupllng bo).ts cornlng lnto effect only inthe event of a short-clrcult, glvlng rlse to tbe maxlmuntorque.

2. Deslm

A dlsc-shaped proJectlon, or as the case nay be, a recess lsprovlded on the couprlng barves for centerlag. The coupllngflanges (Pos, 141 and 142) are provlded wlth holes for thecoupllng borts (eos. 151). spherlcal seats are provlded lnthe boLt boles to perult the bolts to alrgn thenservss,avoldlng bendlng stresses. A falrly large clearance for tbebolts ls provlded ln the bolt-hoLes. The bolts are preventedfron turaing by dowel plns (fos. 1]21).

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snalI bolts are pretlghtened coId, whlIe larger bolts arepuIIed up wlth the ald of electrlc heatlng bars.

,. Settine uo

settlng up and boltlng of r1gld coupllngs nust be carrled,out wlth partlcular care. The bearlngs must be adJusted., byaLteratlon of thelr helght and posltion ln the hori.zontaLpLaner so that the two coupllng faces are preclsely para11el.thls roust be verlfj.ed by treasurement, A check nust also benade to ensure that both coupllng halves are rrrnnlng true.rhe coupllng boJ.ts must be rrnlforurly pretlghtened. ln d.1a-netrlcal3-y opposed palrs.If excessive devlation fron tnre running ls notlced. at thefree end of the shaft after pretlghtening the coupLing bolts,elther thb coupllng faces are inaccurate, which rnust becorrected by scrapi.ngr or the bolts are not r:nj.fornly tlght.They must then be loosened or tlghtened, r.rntlI the shaft runstrue.Rtgld' couplings requlre ao maintenance. In operation, falluresof rlgld coupJ.lngs are practlcally excLud.ed..Jacklng bolts (ros. 154) are supplled. for separatlng thecoupllng halves. The settlng-up and bortlng-up of thecoupllng after an overhaul of the turbine must be carried.out wlth the seme care as 1s obser-rred, during erection.

4. Suoplenoents

see appendi.x

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Bezeichnung der Hauptteil-e zur KupplungNomenclature of the parts for the couplingNomenclature des pidces d.taccouplementNomenclatura de las pi-ezas del acoplamiento

Pos. 141 KupplungsflanschCoupling flangeBride draccouplementBrlda de acoplamiento

142 KupplungsflanschCoupling flangeBride draccouplementBrida de acoplamlento

141 KupplungssternCoupling starEto11e draccouplementEstreLla de acoplamiento

144 KupplungssternCoupling starEtoile draccouplementEstrella de acoplamlento

145 ArretlerringRetaining ringBague dtarr€tAni11o de fijaci6n

146 ArretierringRetaining ringBague dtarr8tAnillo de fljaci6n

147 SicherungsstiftLocklng pinGoupille de s0ret6Pasador de seguridad

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Pos. 148

149

KupplungsmutterCoupling nutEcrou draccouplementTuerca de acoplami-ento

KupplungsmutterCoupling nutEcrou draccouplementTuerca de acoplamlento

SicherungsblechLocking plateT81e de s0ret6Chapa de segurldad

150

15Oa SicherungsstiftLocking plnGoup111e de s0ret6Pasador de seguridad

151 KupplungsschraubeCoupling boltBoulon draccouplementTornillo de acoplamlento

151a ArretierstlftRetalnlng pinCheville dtarr€tPasador de fljaci6n

152 Keil mit NietKey with rivetClavette avec rlvetChaveta con remache

Keil rolt NietKey with rlvetClavette avec rivetChaveta con remache

151

141

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Pos. 154 AbdriickschraubeSeparating screwBoulon d chasserTornillo de separacl6n

AbziehschraubeExtractlon screwVis d !arracheTornillo de extracci6n

155

155a ZahnkranzToothed wheelCouronne dent6eCorona dentada

156

157

158

159

150

SlcherungsringSecuring rlngAnneau de fixationAn111o de seguridad

HaltestiftHolding pinGoupille de serraeePasid.or d.e fijaciSn

Mutter zu KupplungsschraubeNut for coupling boltEcrou pour boulon draccouplementTuerca para perno de acoplamj-ento

ScherbtichseShear bushAnneau de cisai].lementAnill-o de clzallamlento

ZentrierringCenterlng ringAnneau de centrageAni1lo para centrar

141

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Pos. 161 ZwischenwelleIntermediate shaftArbre interm6diaireArbol intermedio

162 ZwischenscheibeIntermedlate dlscDlsque interm6diaireArandela lntermedla

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RETIOVAL AND INSTALLATION OF THE INTERIV]EDIATE SHAFT

BETI^IEEN THE COTIPRESSOR/TURBINE ASSEIV]BLY AND GENERATOR

Contents:

1. Removal

1.1 Position1.2 Removal sequence2. Installat'ion2.1 Position?.2 Instal I ati on sequence3. Diagram of couplings

1. Removal

i.1 Be:i!r.snThe entire string of rotors is fixed by the thrust bearingof the turbine-compressor rotor such that no axial movement

is possible.

t .2 Bquoya I sqggenge

Insert the aux'i I i ary beari ng used f or erect'i on purposes.

Loosen the coupling bolts at "a".Displace the intermediate shaft 24 mm in the direction ofthe generator by means of the jacking bo1ts, whereby the gene-rator rotor wi I I a I so be di s pl aced duri ng thi s process.

Loosen the coupling bolts at "b".Pne!s out the i ntermed i ate shaft 1 from the ada pter f.i tti ng

of intermediate shaft 2 in the direction of the turbine.Remove the i ntermed i ate shaft 1 .

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Loosen the coupling bolts at ',c,,.

Di spl ace the i ntermedi ate shaft 2 withe direction of the turbine to suchchecki ng edge on the gear wheel andthe generator rotor no 1 onger cover

Remove the i ntermedi ate shaft 2 wi th

Installation

Be:t !ienThe turb i ne -compressor rotorit js fixed by means of the

th the jacking bolts inan extent that the

the coupling flange ofeach other.

the attached gear wheel.

cannot be axialiythrust bearing.

d'i splaced since

le

In:!iILq!isn -:eque!eeInstall the intermediatewi th the generator rotorInstall the intermed'i atemediate shaft 2.

gear wheel and

the coupling bol

bolt up to the 'i

shaft 2 with(ti ghten up

shaft 1 and

c0up

ts).nter

Displace the generator rotor ?4 mm in the direction of theturbine.

Bol t the 'i

Remove the

ntermedi ate shaft I to the turbine-compressor rotor.auxi I i ary bear"'i n f or erecti on urposes I

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3. Diagram of couplinqs

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