STEAM TURBINE yog dab tsi?
Covchav turbineyog ib hom ntawm lub tshuab cua sov lub tshuab uas lub zog cua sov hloov mus rau kev ua haujlwm ntawm cov tshuab ua haujlwm.Qhov kev tsim ntawm chav turbine yog qhov yooj yim heev.Tsis muaj piston pas nrig, flywheel lossis swb li qub txuas rau lub turbine.Yog li kev saib xyuas yooj yim heev.Nws muaj ntawm ib lub rotor thiab ib txheej ntawm rotating hniav uas txuas mus rau ib tug ncej thiab ncej yog muab tso rau hauv nruab nrab ntawm lub rotor.Ib lub tshuab hluav taws xob hu uachav turbine generatoryog txuas nrog lub rotor ncej.Lub tshuab hluav taws xob turbine sau cov tshuab hluav taws xob los ntawm cov ncej thiab hloov mus rau hauv hluav taws xob hluav taws xob.Chav turbine generatorkuj txhim kho covturbine efficiency.
KEEB KWM NTAWM STEAM TURBINE
Thawjchav turbinetau tsim los ntawm Greek Mathematician Hero ntawm Alexandria txog 120 BC thiab nws yog hom reciprocating. Lub tshuab hluav taws xob niaj hnub no tau tsim los ntawm Sir Charles Parsons xyoo 1884.Cov qauv tsim tau hloov pauv ntau zaus. Lub peev xwm ntawm turbine yog los ntawm 0.75 KW txog 1000 MW. Nws yog ntau yam kev siv xws li twj tso kua mis, compressor thiab lwm yam. Niaj hnub nimno chav turbine kuj yog siv los ua ib tug prime mover nyob rau hauv ib tug loj.thermal fais fab nroj tsuag.
UA HAUJ LWM NTAWM STEAM TURBINE
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm chav turbine nyob ntawm qhov kev ua haujlwm dynamic ntawm chav ua haujlwm.Ib lub siab tshaj tawm chav yog los ntawm lub nozzles thiab nws ntaus cov rotating hniav uas haum rau ntawm ib lub disc mounted ntawm ib tug ncej.Qhov no high-ceev chav ua dynamic siab ntawm lub Cov hniav nyob rau hauv uas cov hniav thiab ncej ob pib tig nyob rau hauv tib txoj kev taw qhia.Basically, nyob rau hauv ib tug chav turbine siab zog ntawm chav rho tawm thiab ces nws hloov dua siab tshiab rau hauv kinetic zog los ntawm cia lub chav ntws los ntawm lub nozzles.Qhov hloov dua siab tshiab ntawm kinetic zog ua txhua yam. ua hauj lwm rau lub rotor blades thiab lub rotor txuas nrog lub tshuab hluav taws xob chav turbine uas ua haujlwm raws li tus neeg nruab nrab.Turbine generator sau cov tshuab hluav taws xob los ntawm lub rotor thiab hloov mus rau hauv hluav taws xob lub zog.Vim tias kev tsim kho ntawm chav turbine yog qhov yooj yim, nws qhov kev vibration yog tsawg dua. lwm lub cav rau tib rotating ceev.Txawm li cas losntau hom kev tswj hwmyog siv los txhim kho turbine ceev.
HOM NTAWM STEAM TURBINE
Raws li txoj cai ua haujlwm, muaj qhov sib txawvhom chav turbine.
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1. Raws li txoj cai ua haujlwm, chav turbines feem ntau muab faib ua ob pawg:
a)Impulse Turbine
b).Reaction Steam Turbine
⇨ Thaum lub tshuab ntaus cov hniav txav los ntawm lub nozzles hu uaImpulse Turbinethiab thaum nws ntaus cov hniav txav nyob rau hauv siab ntawm kev qhia mechanism hu uaTeb Turbine.
Nyeem ua hauj lwm hauv paus ntsiab lus ntawmImpulse thiab Reaction chav turbine.
Chav turbines tuaj yeem muab faib ua pawg hauv qab no:
2. Raws li kev taw qhia ntawm cov dej ntws, nws tuaj yeem muab faib ua ob pawg: -
a).Axial Flow Chav Turbine: -
b).Radial Flow Chav Turbine: -
⇨ Thaum cov dej ntws hauv lub casing yog sib npaug rau lub rotor ncej axis ces nws yog hu ua Axial Flow Steam Turbine thiab ntws ntawm chav hauv lub casing yog radial mus rau lub rotor ncej axis hu ua Radial Flow Chav turbine.
3. Raws li qhov kev mob ntawm cov pa, nws tau muab faib ua ob pawg: -
a)Back Pressure lossis Non-Condensing Hom Chav Turbine: -
b)Condensing hom Chav Turbine: -
⇨ Tom qab kev nthuav dav ntawm chav nws tau tawm mus rau hauv cov huab cua hu ua rov qab siab chav turbine lossis tsis yog-condensing hom chav turbine txwv tsis pub nws tawm mus rau hauv lub condenser hu ua condensing turbine.
4. Raws li qhov siab ntawm chav, nws tuaj yeem muab faib ua pawg hauv qab no: -
a)High-pressure los yog pass-out los yog Extraction chav turbine: -
b)Nruab nrab-siab lossis rov qab siab chav turbine: -
c)Tsawg-siab turbine: -
⇨ Lub siab, nruab nrab thiab qis-siab chav yog nkag mus rau hauv lub turbine, hu ua high-pressure chav turbine los yog nruab nrab siab chav turbine los yog rov qab siab chav turbine thiab qis-siab chav turbine.Cov turbines no yog siv rau ntau yam manufacturing thiab cua sov txheej txheem.
5. Raws li tus naj npawb ntawm theem, nws tuaj yeem muab faib ua pawg hauv qab no: -
a)Ib theem chav turbine: -
b)Multi-theem chav turbine: -
⇨ Chav yog los ntawm nozzles thaum dhau los ntawm ib txheej ntawm cov hniav txav hu ua ib theem chav turbine thiab ntws ntau theem ntawm cov hniav txav hu ua multi-theem chav turbine.
6. Raws li cov hniav thiab lub log, nws tuaj yeem muab faib ua pawg hauv qab no: -
a)Siab Compounding Chav Turbine
b)Velocity Compounding Chav Turbine
c)Impulse-Reaction Combined Chav Turbine
d)Siab-Velocity Compounding Chav Turbine
