IS 7207: Criteria for design of generator foundation for hydroelectric power stations

13 Pages·1992·1.3 MB·English

by  Bureau of Indian Standards

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“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 7207 (1992): Criteria for design of generator foundation
for hydroelectric power stations [WRD 15: Hydroelectric
Power House Structures]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
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“Knowledge is such a treasure which cannot be stolen”

IS 7207 :1992
v77399nq

Indian Standard
CRITERIAFORDESIGN OF GENlikATOR
FOUNDATION FOR HYDROELECTRIC
POWERSTATIONS
( First Revision )
UDC 712-12*113*126

@ SIB 1992
BUREAU OF INDIAN STANDARDS
KANAM ,NAVAHB 9 RUDAHAB HAHS RAFAZ MARG
WEN IHLED 110002

yaM J992 ecirP puorG 3
cirtceleordyH rewoP esuoH serutcurtS lanoitceS ,eettimmoC RVD 51
FOREWORD
sihT naidnI dradnatS ( tsriF noisiveR ) was detpoda yb eht uaeruB fo naidnI Standards, retfa eht
tfard dezilanif yb eht cirtceleordyH rewoP esuoH serutcurtS lanoitceS eettim;noC had neeb devorppa
yb eht reviR yellaV noisiviD .licnuoC
ehT rotareneg noitadnuof fo a rewop-ordyh noitats sekat suoirav smrof- gnidneped ylniam nopu eht
tfahs .tnemegnarra nI eht esac fo lacitrev tfahs ,rotareneg its noitadnuof is detacol tsomla yltcerid
revo eht spiral .gnisac roF latnoziroh tfahs ,rotareneg eht noitadnuof is ni eht mrof fo ralugnatcer
kcolb htiw a ssecer ni eht elddim rof gnisuoh eht ria .srelooc ngiseD fo noitadnuof fo lacitrev
rotareneg ylevitarapmoc is erom detacilpmoc as ti sevlovni noitarugifnoc gnisirpmoc erom larutcurts
stnemele as against that fo eht latnoziroh rotareneg hcihw yllareneg has mass etercnoc .noitadnuof
tI is yllautriv elbissopmi ot laed htiw all elbissop snoitairav ni rotareneg noitadnuof .tnemegnarra
ecneH esu fo lareneg serudecorp debircsed ni this standard dluohs eb desab no dnuos gnireenigne
tnemeyduj fo eht .ngised
sihT standard was tsrif dehsilbup ni 1974. sihT noisiver has neeb nekat up ni eht thgil fo eht
stnemmoc deviecer morf eht .srebmem ehT rojam snoitacifidom edam ni this tsrif noisiver era as
:swollof
)a ehT ciluardyh tsurht has neeb dedulcni rednu yrassecen data.
)b tnatropmI ngised snoitaredisnoc evah neeb .dedulcni
)c A etarapes paragraph no stuo-kcolb is .dedulcni
roF eht esoprup fo gnidiced rehtehw a ralucitrap tnemeriuqer fo this standard is deilpmoc ,htiw eht
lanif ,eulav devresbo ro ,detaluclac gnisserpxe eht tluser fo a tset ro ,sisylana shall eb dednuor ffo ni
ecnadrocca htiw SI 2 : 1960 seluR‘ rof gnidnuor ffo laciremun seulav ( revised 1’. The number of
tnacifingis secalp deniater ni eht dednuor ffo eulav dluohs eb eht emas as that fo eht deificeps eulav
ni this standard.
IS 7207 : 1992
Indian Standard
CRITERIA, FOR DESIGN OF GENERATOR
FOUNDATION FOR HYDROELECTRIC
POWER STATIONS
( First Revision )
1 EPOCS )g ehT gnitarepo and yawanur deeps fo eht
;enihcam and ~,
sihT standard slaed htiw eht senilediug and
airetirc rof ngised fo rotareneg snoitadnuof ni )h mumixaM esir ni erutarepmet fo ria
gnidnuorrus eht .enihcam
cirtceleordyh rewop .snoitats
2 SECNEREFER 4 ROTARENEG NOITADNUOF
TNEMEGNARRA
ehT gniwollof naidnI Standards era yrassecen
stcnujda ot this standard: 4.1 ehT rotareneg stsisnoc fo yranoitats and
gnitator parts. ehT yranoitats parts ylniam
ZS No. Title esirpmoc fo dnuow ,rotats pot and mottob
stekcarb gnisuoh tsurht and ediug .sgniraeb
456 : 1978 edoC fo ecitcarp rof plain and ehT gnitator parts edulcni rotareneg ,rotor
decrofnier etercnoc ( third revision ) ( redips : mir and dleif metsys ) reticxe erutamra
800 : 1984 edoC fo ecitcarp rof lareneg -tsnoc and tnenamrep tengam and rotareneg .rotor
noitcur ni leets ( second revision ) 4.1.1 nI a lacitrev tfahs ,enihcam dnuow rotats
and mottob tekcarb yltcerid tser no eht
1889 : 1984 airetirC rof ekauqhtrae tnatsiser
.snoitadnuof poT tekcarb stser no rotats .pot
ngised fo serutcurts ( fowth revision) ehT thgiew fo eht gnitator parts fo eht rotareneg
:)3traP(4792 edoC fo ecitcarp rof ngised and as llew as fo enibrut and ciluardyh tsurht is
1975 noitcurtsnoc fo enihcam -adnuof dettimsnart hguorht tsurht gniraeb .tekcarb
snoit : traP 3 snoitadnuoF rof ediuG sgniraeb era dedivorp rof gniniatniam eht
yrator epyt senihcam ( muidem tnemngila fo eht .tfahs
and hgih ycneuqerf ) (jirst revision ) nI esac fo latnoziroh tfahs ,rotareneg eht
rotats and eht rotor yllareneg tser no a nommoc
3 YRASSECEN ATAD
deb etalp hguorht latsedep .sgniraeb
3.1 ehT gniwollof noitamrofni dluohs eb dezilanif
4.1.2 srotareneG era deifissalc ylniam ni eerht
yb eht larutcurts reenigne ni noitatlusnoc htiw

seirogetac gnidneped nopu eht noitacol fo eht
eht lacirtcele ,reenigne lacinahcem reenigne and
rotareneg :rerutcafunam tsurht and ediug gniraeb as :swollof
4 A deliated margaid gniwohs plan and )a allerbmU epyt ni hcihw tsurht gniraeb
I noitces fo rotareneg and its ;snoitadnuof and eno ediug gniraeb era woleb eht
;rotor
b) A deliated gniward gniwohs sezis and
noitacol fo all rohcna ,stlob epip ,seveels
)b imeS allerbmu epyt ni hcihw tsurht
,stekcop bus ,stcud deddebme parts, ssecca
gniraeb and rewol ediug gniraeb is
,syaw ;cte woleb eht rotor and eno ediug gniraeb
cl A deliated gnidaol margaid gnitacidni is evoba eht ,rotor dellac reppu ediug
stniop fo noitacilppa fo all sdaol and ;gniraeb and
secrof deredisnoc ni noitadnuof ngised as
)c noisnepsuS epyt ni hcihw tsurht gniraeb
nevig ni 5. nI eht margaid ton ylno eht
is detacol revo eht rotor and eno ediug
daol tub osla eht noitacol noitcerid and
gniraeb is evoba and rehtona woleb eht
saera revo hcihw eseht sdaol lliw eb
;rotor eht eno evoba is dellac reppu
detubirtsid dluohs eb ;detacidni
ediug gniraeb and eht rehto eno as rewol
4 ehT etelpmoc thgiew fo eht enihcam as ediug .gniraeb
llew as etarapes sthgiew fo gnitator and
yranoitats parts; 4.1.3 _ rotareneG snoitadnuof era dengised
gnipeek ni weiv eht evoba .seirogetac esehT
)e ciluardyH ;tsurht esirpmoc rewol tekcarb ,troppus rotats troppus
f> ehT yticapac fo detar tuptuo fo eht and gnisuoh/lerrab fo leets ‘or .etercnoc rewoL
enihcam ; tekcarb and rotats stroppus yam eb suounitnoc
1
IS 7207 : 1992
ralucric ro lanogylop rings ro ni mrof fo rebmun gniraeb ni esac fo noisnepsus epyt senihcam )
fo desiar slatsedep and rewol tekcarb noitadnuof gnitser no eht rotats troppus no eht rotats
yam osla eb suounitnoc ro suounitnocsid ,noitadnuof hcihw osla ekat eht citats .daol
.revelitnac ehT gnisuoh/lerrab yam eb
6.2 ehT sdaol and secrof nevig ni 6.2.1 ot 6.2.11
detcurtsnoc ni utis-ni-tsac decrofnier etercnoc ro
dluohs eb deredisnoc rof gningised eht rotareneg
ni tsac-erp leets demarf dessertserp/decrofnier
.noitadnuof emoS fo eht .sdaol detsil woleb yam
etercnoc units ylreporp deruces ot hcae rehto ro ni
ton eb elbacilppa ot yna ralucitrap rotareneg
.leets
.noitadnuof ynA rehto daol railucep ot yna
4.2 Generator Foundation Types noitadnuof tnemegnarra and dednemmocer yb eht
enibrut ro rotareneg srerutcafunam dluohs eb
ehT epahs and noitarugifnoc fo rotareneg .deredisnoc laniF ngised sdaol dluohs eb
noitadnuof ylegral sdneped :nopu ( a > eht tfahs dehsilbatse hguorht esolc noitanidro-oc htiw eht
,tnemegnarra rehtehw eht tfahs is lacitrev ro srerutcafunam and lacirtcele and lacinahcem
,latnoziroh and ( )b noitacol fo eht tsurht .gniraeb .sreenigne F
ehT sliated fo ,snoitadnuof ,revewoh yam osla
yrav gnidneped nopu eht ngised and noitarugifnoc 6.2.1 daeD sdaol morf livic .skrow
fo eht .tnempiuqe roF eht esoprup fo this
6.2.2 eviL daol no sroolf dettimsnart ot eht
standard, eht rotareneg noitadnuof is yldaorb
rotareneg .noitadnuof
deifissalc rednu eht gniwollof :seirogetac
a> 6.2.3 lacitreV daol no rotats elos etalp hcihw
RCC lanogylop ro ralucric noitadnuof
yam esirpmoc eht :gniwollof
htiw tsurht gniraeb no pot fo rotats
and dedivorp htiw rehtie RCC ro leets 4 thgieW fo tnenamrep tengam ,rotareneg
rotareneg gnisuoh ( ees .giF 1 .) reverehw ;elbacilppa
b) RCC lanogylop ro ralucric noitadnuof b) thgieW fo tolip and main ,reticxe reverehw
htiw denibmoc tsurht and ediug gniraeb ;elbacilppa
detacol woleb eht rotor ( ees .giF 2 .)
4 thgieW fo tsurht ,gniraeb ,rotareneg ,rotor
4 leetS tip renil lacirdnilyc ro detacnurt ,tfahs enibrut gnitator parts and ciluardyh
enoc epahs tnednepedni fo gnidnuorrus tsurht ( rof dednepsus epyt srotareneg
etercnoc ( ees .giF 3 .)
ylno ;)
d) RCC emarf htiw sllaw/snmuloc and 4 thgieW fo pot ediug ;gniraeb
;smaeb
d thgieW fo pot ,tekcarb rotats gniroolf and
4 RCC emod ( ees .giF 4 .) ;rotats and
f) RCC noitadnuof rof latnoziroh- tfahs f) ynA rehto daol eud ot tnempiuqe no eht
tnemegnarra ( ees .giF 5 .) rotareneg ,noitadnuof sessecer ni eht tip
renil gnisuoh etag gnitarepo ,rotomovres
5 SOME IMPORTANT DESIGN
.cte

CONSIDERATIONS
5.1 laicepS erac dluohs eb nekat ot diova eht 6.2.4 lacitreV daol no rewol ,tekcarb hcihw yam
esirpmoc eht :gniwollof
eganad ot snoitadnuof against .snoitarbiv
)a thgieW fo rewol ,tekcarb sekarb and ;skcaj
5.2 nI esac fo esu fo latnoziroh skcaj rof
gnirrefsnart eht daol hguorht eht tsurht sgniraeb )b daoL elihw gnitfil eht rotor no ,skcaj
at eht pot fo eht rotareneg ot eht lerrab dnuora reverehw ;elbacilppa and
noitacol fo eht .skcaj sihT noitrop dluohs eb
dengised as a gnir ot ekat pooh ,noisnet stnemom )c thgieW fo tsurht gniraeb rotareneg ,rotor
and shears rof tsrow noitanibmoc fo sdaol gnirud ,tfahs enibrut gnitator parts and ciluardyh
lamron gninnur fo ,senihcam at eht emit fo tsurht ( ton elbacilppa rof dednepsus epyt
noitcere and at eht emit fo elbuod trohs tiucric fo rotareneg ) .
eht rotor windings. 6.2.5 lanoisroT ,daol hcihw yam esirpmoc eht
:gniwollof I
6 LOADS AND FORCES
)a mumixaM laitnegnat ecrof at eht rotats
6.1 ehT rotareneg noitadnuof is ot refsnart
elos etalp eud ot trohs tiucric ni rotats
citats as llew as gnitator secrof eud ot yranoitats
;gnidniw and
and gnitator parts. gnitatoR parts etareneg
lanoisrot as llew as laidar .secrof nI esac fo )b laitnegnaT ecrof at rewol tekcarb elos etalp
nru allerbmu-imes/allerb ,senihcam eseht citats eud ot gnikarb ro gniraeb noitcirf ,euqrot
and cimanyd secrof era derrefsnart nwod ot sub- reverehw .elbacilppa
erutcurts mass etercnoc hguorht rewol tekcarb
gnitser no eht rewol tekcarb troppus dne hguorht 6.2.6 Radial ,ecrof hcihw yam esirpmoc eht
reppu tekcarb ( rewol as llew as hguorht tsurht :gniwollof
2
SI 7207 : 1992
4 Radial ecrof no rotats elos plate/RCC gnirud eht enihcam ni noitca morf that fo egareva
rotareneg gnisuoh eud ot eno dedis citengam gnidnuorrus .erutaepmet ,revewoH a muminim
;noitcartta and fo 25 mm bars at 30 mc ertnec-ot-ertnec dluohs
eb dedivorp no htob eht secaf ni htob .snoitcerid
b) Radial ecrof no rewol ediug gniraeb eud ot
eno dedis citengam .noitcartta 6.2.12 llA elbissop snoitanibmoc fo secrof and
sdaol dluohs eb denimaxe rof noitaulave fo lacitirc
6.2.7 ehT sdaol no a latnoziroh tfahs rotareneg
,stnemom shears and tsurht no eht rotareneg
no a nommoc deb etalp yam esirpmoc eht
.noitadnuof ,revewoH eht mumixam laidar ecrof
:gniwollof
eud ot eno dedis citengam noitcartta desuac eud
)a thgieW fo ,rotats ,rotor latsedep gniraeb ot gnitiucric-trohs fo flah fo eht rotor selop deen
and deb ;etalp ton eb deredisnoc htiwgnola cimsies .sdaol *
)b thgieW fo gnahrevo reticxe and ;rennur 7 TCEFFE FO SNOJTARBIV
)c mumixaM lacitrev ecrof eud ot trohs 7.1 oT ekat eht stceffe fd snoitarbiv otni tnuocca
tiucric ni ;rotats ecnadiug yam eb nekat morf SI 2974 ( traP 3 ) :
1975. rehtruF ni a cirtcele-ordyh rewop noitats
)d gniraeB noitcaer eud ot decnalabnu ;stej ,noitadnuof dluohs eb dekcehc against eht stceffe
and fo yawanur .deeps
)e laixA ciluardyh .tsurht 8 STUO-KCOLB
6.2.8 Forces Due to Eccentricity in Rotating Parts 8.1 stroffE dluohs eb edam ot edivorp muminim
hguohtlA hcae rotareneg dluohs eb llew ,decnalab elbissop rebmun fo stuo-kcolb ni eht etercnoc
tey niatrec decnalabnu ,secrof desuac yb eht tcaf .slerrab roF gnitroppus sesoprup leets talf/etalp
that eht ertnec fo ytivarg fo gnitator parts yam ton stnemdebme eb desu rof gnidlew eht gnitroppus
yltcaxe edicnioc htiw eht sixa fo ,noitator hcihw stekcarb daetsni fo gnidivorp stuo-kcolb rof
ecudni noitadnuof ,snoitarbiv dluohs eb detnuocca gnituorg .stlob roF making stuo-kcolb reverehw
rof ni eht ngised fo noitadnuof ni noitatlusnoc ,elbadiovanu elocomreht krow-mrof eb desu hcihw
htiw eht .srerutcafunam steg devlossid ni lortep daetsni fo nedoow .eno
noisivorP fo stuo-kcolb rof gninethgit eht stlob at
6.2.9 Yibrations Due to Unequal Ground Settlement htob eht sdne eb edam rof evitceffe noitallatsni
snoitarbiV yam osla eb decudni eud ot egnahc ni fo eht ,stlob reverehw ,elbissop llew dengised
ytilacitrev fo eht tfahs as a tluser fo lauqenu knirhs-non stuorg eb desu rof gnituorg fo eht
dnuorg tnemelttes hcihw yam ekat ecalp revo emit .stlob
gnirud eht esruoc fo .noitarepo
9 SLAIRETAM AND ELBISSIMREP SESSERTS
6.2.10 ehT rotareneg noitadnuof dluohs eb 9.1 decrofnieR etercnoC
dengised rof cimsies sdaol ni ecnadrocca htiw
SI 1893 : 1984. tI dluohs mrofnoc ot SI 456 : 1978.
6.2.10.1 nI esac fo rotareneg noitadnuof detacol 9.2 larutcurtS leetS

ni cimsies senoz eht elos setalp rof rotats and
tI dluohs mrofnoc ot SI 800 : 1984.
mottob stekcarb dluohs eb derohcna ton ylno
yllacitrev and ylesrevsnart tub osla .yllaidar 9.3 elbissimreP sessertS
6.2.11 elbisimreP sesserts dluohs eb nekat ni ecnadrocca
Forces Due to Temperature and Shrinkage
htiw SI 456 : 1978 and SI 800 : 1984.
secroF eud ot erutarepmet noitairav and egaknirhs
ni rotareneg noitadnuof dluohs eb deretac rof ni 9.3.1 etercnoC and leets sesserts yam eb ylbatius
:tht .ngised ehT erutarepmet noitairav dluohs eb decuder ot ekat erac fo ycanimretedni fo
nekat as eht ecnereffid fo erutarepmet depoleved erutcurts/sdaol and cimanyd .secrof
3
SI :7027 2991
MALP
P1A.N
SECTIONALEL EVATION LANOITCES NOITAVELE
PI = lacitrev ecrof no rotats elos etalp ,P = lacitrev ecrof no rota’s elos etalp
PZ = laitnegnat ecrof no rotats elos etalp PZ = laitnegnat ecrof no rotats elos etalp
Pa = laidar ecrof no rotats elos etalp ( noitcerid ;demussa Pa = laidar ecrof no rc:a~s elos etalp ( noitcerid ;demussa
yam tca ni yna noitcerid ni latnoziroh enalp ) yam tca ni yna noitcerid ni latoziroh enaip )
Pt = lacitrev ecrof no rewol tekcarb elos etalp P4 = lacitrev ecrof no rewol tekcarb elos etalp
P, = laitnegnat ecrof no rewol tekcarb elos etalp P, = laitnegnat ecrof no rewol tekcarb elos etalp
Pg = laidar ecrof no rewol bracke elost plate P, = laidar ecrof no rewol tekcarb elos etalp

P, = laidar ecrof no RCC rotareneg gnisuoh ( tneserp P, = laidar ecrof no RCC rotareneg gnisuoh ( tneserp
ylno fi gnicarb dedivorp neewteb gnisuoh dna pot ylno fi gnicarb dedivorp neewteb gnisuoh dna pot
tekcarb ) tekcarb )
FIG. 1 CCR CIRCULAR GENERATOR FIG. 2 RCC OCTAGONAL GENERATOR
FOUNDATION WITH THRUST GNJRAEB ON FOUNDATJON WITH CONBIND THRUSTAND
TOP OF STATOR GUIDE BEARING LOCATED BELOW THE
STATOR
4
IS 7207 : 1992
UPPER GUIDE
STEEL BARREL
SCROLL CASE
ETON - Load si derrefsnart hguorht the tsurht gniraeb hcihw si detnuom no the .lerrab
.GIF 3 STEEL PIT LINER DETACNURT CONE SHAPED FOUNDATION
WITH THRUST BEARING SUPPORTED ON TURBINE TOP COVER

FIG. 4 DOME TYPE ROTARENEG TADNUOF ‘ION