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CONTENTS - TURBINE UNIT

1 Turbine Set.....................................................................................................................2

1.1 Steam Turbine............................................................................................................2

1.1.1 Features Of Design.............................................................................................2

1.2 Drain System..............................................................................................................3

1.3 Glan Sealing System................................................................................................3

1.! R"t"r Barring Gear.....................................................................................................3

1.!.1 General...............................................................................................................3

1.# $"ating.......................................................................................................................#

1.% T&ermal 'nsulati"n......................................................................................................#

2 Gearb"(..........................................................................................................................%

2.1 General.......................................................................................................................%

2.2 Design Data................................................................................................................%

2.3 Te)&ni)al Des)ri*ti"n +*i)y)li) Gear Unit...................................................................%

2.3.1 General...............................................................................................................%

2.3.2 St"e),i)&t -"a +uali/ati"n..............................................................................02.3.3 $"m*ensati"n Of A(ial F"r)es...........................................................................0

2.! $"nne)ti"n T" T&e Generat"r Frame.........................................................................0

2.# $"u*ling.....................................................................................................................0

2.% Design Features.........................................................................................................

2.%.1 Fun)ti"ning.........................................................................................................

2.0 'nternal Oil Distributi"n An Sealing...........................................................................

2. +ffi)ien)y....................................................................................................................

2. Draing....................................................................................................................14

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1 Turbine Set

1.1 Steam Turbine

1.1.1 Features of Design

$"nensing turbine< a))"ring t" D'N !312 downwards

Turbine "f multi9stage rea)ti"n esign< an f"ll"ing esign features>

&"ri/"ntally s*lit turbine )asing "f )ast )"nstru)ti"n f"r t&e 859*art an ele )"nstru)ti"n

f"r t&e -59*art.

guie blae )arriers as su**"rt f"r t&e guie blaing "f t&e rea)ti"n *art< "f f"rge "r )ast

)"nstru)ti"n.

n"//le gr"u* )"ntr"l f"r t&e 85 9*art.

rum ty*e turbine r"t"r.

steam sealing glans beteen )asing an r"t"r are "f labyrint& ty*e.

raial s*lit 6"urnal bearings "f multi9fa)e slee;e ty*e< *r"te)te against inamissible &eating

A))"ring t" D'N9+N9'SO 12!!< T19TE egree "f *urity> Sa 2

5rime $"ating>

29)"m*"nent e*"(y resin base as& *rimer)"at t&i),ness 4 Hm ?ry@$"l"ur "f uner)"at> RA- 0441< sil;er9grey

turbine )asing> &eat9resistant sil;er br"n/e

Final $"ating>

29)"m*"nent a)ryli)9*"lyuret&ane final )"at)"at t&i),ness !4 Hm ?ry@< stanar f"r in""r< )"rr"si;ity )ateg"ry $2$"l"ur "f final )"at> RA- #414< blue ?+n/ianblau@

1.+ Terma Insuation

All surfa)es it& a tem*erature e()eeing #4 C$ uring n"rmal "*erati"n< ill be t&ermallyinsulate. +()e*ti"ns ill be mae f"r "il su**ly< gearb"(< safety ;al;es an similar )"m*"nents&"se fun)ti"n is limite by insulati"n.

T&e surfa)e tem*erature "f all eui*ment it&in t&e s)"*e "f su**ly< measure at 1 m istan)e

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% (earbo

%.1 (enera

generat"r m"unte e*i)y)li) gearb"( a))"ring t" D'N 34.

)"a(ial &ig& s*ee an l" s*ee s&afts

$"u*lings>

9 &ig& s*ee )ur;e t""t& )"u*ling beteen turbine an gearb"(9 flange )"u*ling beteen gearb"( an generat"r

)"u*ling )asing

%.% Design Data

Stages 9 1

T""t&ing 9 "uble &eli)al

'nlet s*ee r*m A**r"( .%44

Dri;e s*ee r*m 1.#44

Ma(. )"ntinu"us "ut*ut I 14#

+ffi)ien)y at full l"a I

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5lanet gears it& &yr"ynami) bearings

Star )arrier su**"rte by gear &"using : generat"r &"using

Annulus ire)tly )"u*le t" t&e generat"r s&aft flange it& a t""t& ring

$"a(ial &ig& s*ee an l" s*ee s&aft r"tating in "**"site ire)ti"ns< t""t& )"u*ling "n t&e

&ig& s*ee s&aft

Gearing esign a))"ring t" D'N 34 : AGMA !21.4%

%.'.% Stoe,/i,t 0oad Euai2ation

T&e St"e),i)&t esign ensures t&at all *lanet gears s&are t&e l"a eually.

T&is is "btaine t&r"ug&>

a free fl"ating sun gear ?n"t su**"rte by bearings@

s*litte annuli raially fle(ible< )a*able "f )"m*ensating e;iati"ns fr"m manufa)turing

t"leran)es an elasti) ef"rmati"ns in ea)& &eli( &alf

a single sie t""t& )"u*ling "n t&e annulus t" )"m*ensate e(ternal f"r)e li,e &"using

;ibrati"ns are fl"ating

%.'.' Com*ensation Of !ia For,es

"uble &eli)al *re;ents internal a(ial f"r)es &en t&e teet& are mes&ing

+(ternal a(ial f"r)es are )"m*ensate t&r"ug& a t&rust bearing in t&e turbine

%." Conne,tion To Te (enerator Frame

T&e gear &"using is s)ree t" t&e generat"r frame t&r"ug& an aa*t"r flange ?s&"n in t&e

se)ti"nal raing@

%.) Cou*ing

?see se)ti"nal raing@

D"uble sie t""t& )"u*ling beteen steam turbine an gear unit it& a )ur;e gearing

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%.+ Design Features

%.+.1 Fun,tioning

?see als" se)ti"n raing@

T&e e*i)y)li) gear in *rin)i*le )"nsists "f t&e *lanet )arrier it& 3 *lanet b"lts ?item 1@< 3 *lanet&eels running in slee;e bearings ?item 13@< t&e t" annuli ?item 1#@ raially m";able in t&eannulus slee;e ?item 1%@ f"r l"a )"m*ensati"n< t&e sun9&eel ?item 12@ an t&e gear )"u*ling"n t&e &ig& s*ee sie.

T&e e*i)y)li) gear is "f star gear esign< i.e. t&e *lanet )arrier is fi(e t" t&e &"using an t&eannuli it& t&e annulus slee;e r"tate ?l" s*ee sie@. T&e sun9&eel ?&ig&9s*ee sie@ is freelyfl"ating beteen t&e 3 *lanet &eels ?l"a euali/ati"n@< T&e gear )"u*ling )"m*ensates t&eraial m";ement "f t&e sun9&eel.

T&e gearing is "f t&e "uble &eli)al esign.

%.3 Interna Oi Distribution !nd Seaing

?see raing J"il istributi"n an sealingJ@

T&e "il enters t&e gear laterally t&r"ug& an "il )"nne)ti"n an lubri)ates t&e &yr"9ynami)slee;e bearings "f t&e *lanet &eels t&r"ug& t&e annuli ?small "utlet b"res@. T&r"ug& b"res int&e *lanet )arrier t&e "il is t&en fe t" t&e sun9&eel &ere t&e gear is als" fe it& "il t&r"ug&small b"res. T&e remaining "il is use t" lubri)ate t&e gear )"u*ling bef"re a))umulating at t&eb"tt"m "f t&e gearb"( an being returne t" t&e "il system.

T&e gearb"( is seale t" t&e generat"r by a fl"ating ring seal an a t&r"er "n t&e generat"rs&aft. T&e fl"ating ring seal is m"unte "n t&e ba),9*late "f t&e flange &ere t&e gearb"( isfitte t" t&e generat"r.

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%.4 Effi,ien,&

T&e gear l"sses ?e*i)y)li) "r &eli)al gear@ in *rin)i*le are )al)ulate as f"ll"s>

t"tal l"ss gear mes& l"sses bearing l"sses ;entilati"n l"sses

Gear mes& l"sses are t"tally unim*"rtant f"r turb"9gears it& &ig& *eri*&eral s*ees ?K 2 I "ft&e t"tal l"sses@. T&e main s"ur)es "f l"ss are bearing an ;entilati"n l"sses in)reasing as t&egear si/e in)reases an t&e *"er t" be transmitte.

$"m*are t" t&e &eli)al gear t&e e*i)y)li) gear a)&ie;es a mu)& &ig&er effi)ien)y ?t&e &ig&er

t&e rati"< t&e larger t&e ifferen)e@< ue t"

)"m*a)t imensi"ns< t&us l"er *eri*&eral s*ee an less ;entilati"n l"sses

n" &ig&9s*ee an &ea;ily l"ae slee;e bearings as in a &eli)al gear ?bearings "f t&e *lanet&eels &a;ing "nly su**"rting fun)ti"n@.

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%.5 Dra6ing

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