Cov yam ntxwv tseem ceeb ntawm cua zog bearings
1. Kev siv ib puag ncig yog hnyav;
2. Cov nqi kho mob siab;
3. Yuav tsum muaj lub neej expectancy;
Classification ntawm cua zog bearings
Bearings rau cua turbines feem ntau suav nrog:
Yaw bearings, suab bearings, spindle bearings, gearbox bearings, generator bearings.
Namely: pitch bearing, yaw bearing, kis kab mob (lub ntsiab ncej thiab gearbox bearing).
Generator bearings
Cov kabmob hom: sib sib zog nqus groove pob bearings, angular contact bearings, thiab lwm yam.
Cov yam ntxwv ua haujlwm: kev kub ceev (1000-1500rpm), kub siab (90-120 ℃) thiab hnyav hnyav.
Yuav tsum muaj roj: zoo heev shear stability, zoo oxidation stability, zoo los tiv thaiv kev ua tau zoo, zoo heev low-temperature pib kev ua tau zoo, thiab lwm yam.
Spindle bearing
Cov kabmob hom: tapered menyuam bearings, spherical bearings, thiab lwm yam.
Cov yam ntxwv ua haujlwm: qis ceev (< 25="" rpm),="" qhov="" kub="" thiab="" txias,="" hnyav="" hnyav="" thiab="" hloov="" pauv="" loj,="" kev="" co,="" cov="" av="" noo="">
Qhov yuav tsum tau muaj roj: zoo heev los tiv thaiv hnav kev ua tau zoo, zoo oxidation stability, zoo heev kub pib kev ua tau zoo, dej tsis kam, thiab lwm yam.
Pitch/Yaw Bearing
Bearing hom: plaub-point sib cuag pob bearing, thiab lwm yam.
Cov yam ntxwv ntawm kev ua haujlwm: nres ntau tshaj qhov tig, qhov kub thiab txias, hnyav load, vibration, high humidity.
Yuav tsum muaj roj: zoo heev los tiv thaiv corrosion thiab fretting tsis kam, zoo heev qis-kub pib kev ua tau zoo, dej tsis kam, zoo oxidation stability, thiab lwm yam.
Txhua lub tshuab cua turbine siv 1 txheej ntawm yaw bearing (slewing bearing), 3 pawg ntawm pitch bearing (slewing bearing) (qee qhov cua turbines qis dua qib megawatt yog cov hniav uas tsis hloov kho, thiab qhov sib txawv pitch bearings yuav tsis siv) los tsim hluav taws xob. Tshuab bearings (qhov tob groove pob bearings, cylindrical roller bearings) 3 txheej ntawm spindle bearings (spherical roller bearings) 2 poob lawm, tag nrho ntawm 9 poob lawm.
Tsis tas li ntawd, muaj gearbox bearings, thiab lub gearbox muaj peb yam qauv. Thawj daim ntawv yuav tsum tau 15 teev ntawm bearings, daim ntawv thib ob yuav tsum tau 18 teev ntawm bearings, thiab daim ntawv thib peb yuav tsum tau 23 teev ntawm bearings. Nyob rau hauv txoj kev no, qhov nruab nrab ntawm cov cua turbine bearings yog 27 teeb.
Cov qauv qauv ntawm cov kabmob rau cov cua turbines feem ntau suav nrog plaub-point sib cuag pob bearings, hla cov menyuam bearings, cylindrical roller bearings, spherical roller bearings, thiab sib sib zog nqus groove pob bearings. Lub yaw bearing yog ntsia ntawm qhov kev sib txuas ntawm tus pej thuam thiab lub tsev, thiab lub suab bearing yog ntsia ntawm kev sib txuas ntawm cov hauv paus hniav ntawm txhua tus hniav thiab lub hub.
Qee cov cua turbine bearing ntau yam tsim los ntawm qee cov tuam ntxhab
Cua zog bearing txheej txheem ntau lawm yuav tsum
1. Lub forging kub yuav tsum tau tswj kom zoo, thiab cov nplej yuav tsum tsis txhob coarse;
2. Nws yog ib qho tsim nyog los tswj cov txheej txheem tempering los xyuas kom meej cov qauv tempered ntawm nws lub siab, thiaj li ua kom nws cov khoom siv kho tshuab;
3. Tswj qhov tob ntawm qhov nruab nrab zaus quenching hardened txheej ntawm qhov chaw;
4. Tsis txhob muaj micro-cracks ntawm qhov chaw.
Lubrication Analysis ntawm Cua Fais Fab Bearings
Qhov ceev ntawm lub tswv yim ncej ntawm lub zog cua gearbox feem ntau yog 10-20 rpm. Vim yog qhov qis qis, cov roj yeeb yaj kiab ntawm cov khoom siv nkag hauv cov kabmob (uas yog, lub ntiaj teb cov kabmob txhawb nqa kabmob) yog qhov nyuaj rau tsim.
Lub luag haujlwm ntawm cov yeeb yaj kiab roj yog cais ob qhov chaw sib cuag ntawm cov hlau thaum cov kabmob khiav kom tsis txhob muaj kev sib cuag ntawm cov hlau ncaj qha.
Peb tuaj yeem qhia txog qhov ntsuas λ txhawm rau txheeb xyuas cov txiaj ntsig lubrication ntawm cov kabmob.
(λ yog txhais raws li qhov piv ntawm cov tuab ntawm cov roj zaj duab xis rau qhov sib npaug ntawm qhov roughness ntawm ob qhov chaw sib cuag)
Yog hais tias λ> 1, nws txhais tau hais tias lub thickness ntawm cov roj zaj duab xis yog txaus los cais ob hlau nto, thiab cov nyhuv lubrication yog zoo;
Yog hais tias λ< 1,="" nws="" txhais="" tau="" hais="" tias="" lub="" thickness="" ntawm="" cov="" roj="" zaj="" duab="" xis="" yog="" tsis="" txaus="" los="" cais="" tag="" nrho="" cov="" hlau="" nto,="" thiab="" cov="" nyhuv="" lubrication="" tsis="" zoo="">
Khiav nyob rau hauv cov xwm txheej ntawm lubrication tsis zoo yuav ua rau muaj kev puas tsuaj rau cov kabmob. Txij li thaum cua fais fab gearboxes feem ntau siv circulating lubricants nrog ISOVG320 viscosity, yog tias λ tau pom tias tsawg dua 1, peb feem ntau tuaj yeem txhim kho cov nyhuv lubrication los ntawm kev txo cov roughness ntawm cov kabmob raceways thiab rollers.
Tsis tas li ntawd, nyob rau hauv kev tsim ntawm lub gearbox, lub ntiaj teb carrier txhawb nqa bearing yuav tsum tau sim kom tsis txhob qhov loj ntawm ib kawg bearing yog me me heev. Hauv kev txheeb xyuas qhov tseeb ntawm daim ntawv thov, peb pom tias txawm tias qhov kev pabcuam lub neej ua tau raws li cov kev xav tau, qhov kev tsim no yuav ua rau cov kab tawm ntawm cov kabmob me me kom tsawg thiab cov roj zaj duab xis tseem tsis tuaj yeem tsim.
Kev soj ntsuam ntawm cheeb tsam bearing ntawm cua zog bearing
Feem ntau, tsuas yog ib feem ntawm lub rollers ntawm ib tug khiav bearing bearing load nyob rau tib lub sij hawm, thiab qhov chaw uas qhov no ib feem ntawm cov menyuam nyob rau hauv lub npe hu ua lub bearing cheeb tsam ntawm lub bearing.
Qhov luaj li cas ntawm cov khoom thauj los ntawm cov kabmob thiab qhov loj ntawm kev khiav tawm yuav cuam tshuam rau thaj tsam ntawm cov kabmob. Yog tias qhov chaw thauj khoom me me dhau lawm, cov menyuam yaus tuaj yeem plam thaum lub sijhawm ua haujlwm tiag.
Rau cua fais fab gearboxes, yog lub ntsiab ncej yog tsim los nrog dual bearing kev them nyiaj yug, theoretically xwb torque yog kis mus rau lub gearbox. Nyob rau hauv cov ntaub ntawv no, tom qab ib tug yooj yim kev ntsuam xyuas, nws tsis yog ib qho nyuaj rau nrhiav tau hais tias lub load los ntawm lub ntiaj teb no carrier txhawb nqa bearing yog me me, yog li ntawd lub bearing cheeb tsam ntawm bearing yog feem ntau kuj me me, thiab cov chais yog yooj yim rau slippage. Hauv kev tsim cov cua fais fab gearboxes, lub ntiaj teb cov neeg nqa khoom txhawb nqa bearings feem ntau siv ob kab kab tapered bearings los yog ob qho tag nrho-yob cylindrical bearings.
Peb tuaj yeem ua kom qhov chaw thauj khoom tau zoo los ntawm kev ua ntej ua ntej cov menyuam bearings los yog txo qhov kev tshem tawm ntawm cov menyuam bearings cylindrical. Daim duab 2 qhia txog kev sib piv ntawm qhov chaw thau khoom ua ntej thiab tom qab txo qhov kev tshem tawm.
Cua zog bearing technology
Kev tsim thiab kev tsom xam: Cov qauv tsim tseem yog raws li kev ua piv txwv, thiab kev kawm ntawm kev tsom xam quab yuam thiab kev thauj khoom spectrum yuav luag tsis muaj. Ntawm cov thev naus laus zis nyuaj yog kev ua haujlwm tsis muaj teeb meem ntawm cov kabmob spindle rau ntau tshaj 13 * 104h thiab kev ntseeg siab ntawm ntau dua 95%; lub siab load peev xwm tsim rau lub siab puas tus nqi ntawm lub gearbox bearing.
Khoom siv: Cov khoom sib txawv thiab kev kho cua sov yog siv rau ntau qhov sib txawv ntawm cov kabmob, xws li kev txhim kho qhov kub ntawm 40CrMo steel rau yaw thiab pitch bearings (ambient kub -40 ℃ ∽-30 ℃, bearing ua hauj lwm kub nyob ib ncig ntawm -20 ℃), cuam tshuam lub zog thiab lwm yam kev siv tshuab Kev kho cua sov txoj kev, nto induction hardening hardening txheej tob, deg hardness, mos siv dav thiab nto tawg tswj; ceev nce bearing yog sib npaug rau txoj kev loj hlob ntawm txawv teb chaws STF, HTF steel thiab tswj cov ntsiab lus zoo ntawm khaws cia austenite Lub ntsiab ncej bearing yog ua los ntawm electroslag remelting carburizing steel ZG20Cr2Ni4A thaum tseem muaj qee qhov sib txawv hauv qhov zoo ntawm lub tshuab nqus tsev degassed steel.
