Lub dynamic thiab zoo li qub siab ua ke lubrication bearing nrog ob chav arc nto rocker yog siv los hloov cov dynamic siab bearing nrog nquag Bush hlawv.
Abstract:dynamic siab bearings yog siv nyob rau hauv DTM287/470 steel pob mills ntawm 50 MW chav tsev boilers nyob rau hauv Jiangyou fais fab nroj tsuag. Vim kev laus ntawm cov cuab yeej siv, cov pobzeb hlawv raug mob ntau zaus, uas cuam tshuam rau kev nyab xeeb ntawm lub boiler. Tom qab hloov cov dynamic siab bearing rau hauv dynamic thiab static siab bearing nrog zoo centering kev ua tau zoo, qhov teeb meem tau daws, qhov siab tsis ua hauj lwm tus nqi ntawm steel pob thee zeb zeb tau thim rov qab, thiab kev nyab xeeb thiab kev lag luam tau ua tiav.
Ntsiab lus: steel pob zeb; Dynamic siab bearing; Dynamic thiab static siab bearing
Jiangyou Fais Fab Cog 4 × 50MW high-pressure units tau muab tso rau hauv kev ua haujlwm tau zoo nyob rau nruab nrab thiab lig xyoo 1960. Ntawm lawv, peb lub boilers (No. 3 boiler, No. 4 boiler thiab No. 6 boiler) txais intermediate cia hom pulverizing system, txhua boiler yog nruab nrog ob txheej ntawm pulverizing systems, thiab ob lub DTM287/470 steel pob mills yog nruab. Cov zis ntawm txhua chav tsev yog 16 t / h, thiab nws cov bearings txais dynamic siab bearings nrog 180 degree qhwv lub kaum ntse ntse.
Vim qhov kev pab cuam txuas ntxiv ntawm lub boiler, kev laus loj ntawm cov khoom siv thiab cov kab mob ntau zaus ntawm cov pob zeb tawg, kev nyab xeeb thiab tag nrho lub zog tsim ntawm chav tsev raug txwv. Tshwj xeeb tshaj yog nyob rau xyoo 1993, ob lub pob zeb steel pob zeb tau muaj kev sib tsoo hav txwv yeem tib lub sijhawm, uas nyuaj rau kev kho, thiab kev nyab xeeb ntawm tag nrho cov nroj tsuag tau ntsib nrog kev sim hnyav.
1 Yog vim li cas rau nquag bearing bush burning steel pob zeb
Lub DTM287/470 steel pob zeb ntawm No. 3 boiler, No. 4 boiler thiab No. 6 boiler nyob rau hauv Jiangyou fais fab nroj tsuag txais lub dynamic siab bearing nrog 180 degree qhwv lub kaum sab xis, thiab lubricating roj zaj duab xis yuav tsim tau tsuas yog tom qab nws ua hauj lwm. los ntawm phau ntawv xov xwm. Yog li ntawd, muaj cov kev xav tau siab rau qhov smoothness thiab concentricity ntawm phau ntawv Journal ntawm ob qho kawg ntawm lub tog raj kheej, thiab tsawg kawg yog ob lub ntsiab lus sib cuag ib square centimeter ntawm cov kabmob bush thiab phau ntawv journal. Nyob rau tib lub sijhawm, cov kabmob bush yuav tsum muaj qee qhov kev ua haujlwm hauv nruab nrab, Txwv tsis pub, lub lubricating roj zaj duab xis yog qhov nyuaj los tsim lossis puas yooj yim. Nws tuaj yeem pom tias qhov yuav tsum tau ua ntawm hydrodynamic lubrication zawv zawg kabmob yog qhov hnyav.
Vim yog kev laus ntawm cov khoom siv dhau los, lub tog raj kheej ntawm No.3 boiler steel pob pulverizer thiab kawg npog ntawm No. 4 thiab No.6 boiler steel pob pulverizers tau tawg rau ntau zaus, uas tau ua rau muaj kev puas tsuaj loj rau qhov sib txawv ntawm cov khoom siv. ob daim ntawv xov xwm sib txuam nrog ob qhov kawg ntawm lub tog raj kheej thiab cov kabmob. Vim qhov kev txwv ntawm qhov chaw nyob, nws tsuas yog kho tau txhua lub sijhawm, thiab nws tsis tuaj yeem daws qhov teeb meem uas qhov concentricity ntawm ob phau ntawv xov xwm tshaj li tus qauv. Tsis tas li ntawd, sab nraum qab ntawm cov kabmob bush ntawm steel pob thee zeb yog kheej kheej, uas muaj qee qhov chaw muaj peev xwm tab sis me me heev. Tsis tas li ntawd, qhov sib koom ua ke ntawm lub nraub qaum ntawm cov kabmob bush thiab lub rooj zaum bearing yog nthuav tawm nyob rau hauv ib puag ncig sab nraud, uas tsis muaj plua plav lossis roj nplua nyeem, ua rau poob ntawm qhov chaw muaj peev xwm ntawm cov kabmob. Vim yog ob qho laj thawj saum toj no, cov kev ua haujlwm ntawm cov kabmob tau hloov pauv, uas ua rau cov thawj dynamic siab bearing tsis tuaj yeem ua haujlwm nyob rau hauv qhov xwm txheej tshiab, yog li cov kabmob bush hlawv raug mob ntau zaus.
Txij li thaum lub concentricity ntawm ob tug ncej ntawm ob sab ntawm lub pob zeb lub tog raj kheej tshaj tus qauv, nws yog tsis yooj yim sua kom daws tau qhov teeb meem. Nyob rau tib lub sijhawm, raws li qhov xwm txheej tiag tiag ntawm cov nroj tsuag hluav taws xob, nws yog qhov nyuaj los hloov cov khoom tseem ceeb thiab cov khoom tseem ceeb ntawm lub pob zeb - lub tog raj kheej, qhov kawg npog, thiab lwm yam, uas yuav tsum tau them nyiaj ntau heev. Tau kawg, nws yog qhov nyuaj los daws qhov teeb meem los ntawm kev cia siab rau kev saib xyuas ntawm bearings.
2 Kev sib tham txog lub tswv yim ntawm kev tshem tawm pob zeb bearing txhaum
Raws li qhov xwm txheej saum toj no, Jiangyou Power Plant tau koom tes nrog cov kws tshaj lij thiab cov kws tshaj lij los ua cov kev tshawb nrhiav thiab kev tshawb nrhiav, rov ua qauv qhia, thiab nrhiav kev tshawb fawb thiab tsim nyog los tshem tawm qhov tsis tshua muaj Bush hlawv ntawm pob zeb bearings. Nws tau pom zoo tias:
1) Nws yog unrealistic los hloov lub tog raj kheej thiab kawg npog ntawm lub pob zeb.
2) Tus thawj dynamic siab bearing muaj cov qauv tsis tsim nyog thiab tsis muaj peev xwm nruab nrab. Txawm hais tias lub peev peev yog me me, nws muaj cov kev xav tau siab ntawm kev sib koom ua ke ntawm ob phau ntawv xov xwm thiab tus nqi sib cuag ntawm cov kabmob, tsis zoo ib puag ncig adaptability thiab tsis tshua muaj kev ntseeg siab.
3) Shenyang Heavy Machinery Factory tsim lub 120 degree qhwv lub kaum sab xis ob chav arc nto rocker hom dynamic thiab zoo li qub siab ua ke lubrication bearing, uas muaj zog heev centering kev ua tau zoo, thiab yog tsim rau kev ua hauj lwm nyob rau hauv hnyav ua hauj lwm tej yam kev mob vim cov yam ntxwv ntawm high-pressure. jacking roj system yuam kev tsim cov roj lubricating zaj duab xis thaum lub pob steel pulverizer tsis pib. Qhov siab tshaj plaws sib txawv nruab nrab ntawm cov ntawv xov xwm ntawm ob qho kawg ntawm lub tog raj kheej yog 2 hli. Tsis tas li ntawd, kev saib xyuas thiab kho cov haujlwm ntawm cov kabmob yog me me, thiab kev sib tsoo ntawm cov kabmob bush thiab phau ntawv xov xwm Cov kev cai rau kev khawb qhov raug thiab kev sib cuag tsis yog siab. Lub tshuab hluav taws xob siab thiab qis qis ua rau "ob chav pov hwm", uas ua haujlwm ruaj khov thiab ntseeg tau. Nws tuaj yeem txawj daws qhov tsis sib haum xeeb uas tsuas yog daws tau los ntawm kev hloov lub hau kawg ntawm lub pob zeb lossis txawm tias lub tog raj kheej. Nws tuaj yeem siv los ua kev daws teeb meem los tshem tawm qhov tsis tu ncua ntawm Bush hlawv tsis ua haujlwm ntawm cov kabmob ntawm cov pob zeb steel hauv cov kev pabcuam txuas ntxiv uas tau hais tseg saum toj no.
3 Retrofit tswvyim ntawm steel pob thee pulverizer dynamic siab bearing
Los ntawm 1994 mus rau 1996, nyob rau hauv lub premise ntawm kev tswj cov thawj pob zeb dynamic siab bearing foundation thiab bearing pedestal foundation ntsia liaj qhov rooj qhov loj, bearing center elevation thiab bearing hav txwv yeem dav, Shenyang Heavy Machinery Factory tau entrusted rau redesign thiab manufacture ob arc nto rocker hom. dynamic thiab zoo li qub siab ua ke bearing nrog 120 degree qhwv lub kaum sab xis thiab ob chav arc nto (arc nto nrog txawv radii raws axial thiab radial cov lus qhia ntawm lub pob zeb) nrog ob chav arc nto (lub cub tawg 4, rauv 6 Hloov thiab hloov cov dynamic siab bearings ntawm pob mills ntawm 3 boiler.
1) Ua kom lub siab qis lubricating roj twj tso kua mis saum toj no tsis hloov pauv, teeb lub jacking lubricating roj channel nyob rau hauv nruab nrab ntawm cov bearing hav txwv yeem, ntxiv ib tug high-pressure jacking roj system nrog ib tug roj siab ntawm 6 MPa, thiab teem roj tsawg. Lub siab thermal tiv thaiv nyob rau hauv hluav taws xob tswj Circuit Court kom ntseeg tau tias lub thee zeb yuav pib tsuas yog thaum lub jacking roj system ua hauj lwm thiab cov roj siab siab tshaj 4 MPa, thiab cov thee zeb mus ncig teb chaws thaum lub jacking roj siab yog qis dua 4 MPa.
2) Thawj txoj hauv kev ua kom txias cov kabmob bush log tau hloov mus rau qhov txias txias Babbitt alloy, thiab cov dej txias ntawm cov yeeb nkab tooj liab tau ncaj qha faus rau hauv Babbitt alloy los txhim kho cov cua txias.
3) Teem lub plhaub bearing kom kaw cov kabmob bush tag nrho.
4 Kev xaus
Tom qab kev hloov pauv ntawm lub ntsiab bearing ntawm lub pob zeb, qhov teeb meem ntawm kev nquag hlawv cov kabmob hav txwv yeem raug daws. Tsis muaj kev sib tsoo hav txwv yeem ntxiv. Txhua lub pob zeb tuaj yeem ua haujlwm ruaj ntseg thiab ruaj khov rau lub sijhawm ntev. Tom qab cov cuab yeej hloov pauv, cov cuab yeej qub tau rov ua dua tshiab, kev ntseeg tau zoo heev, thiab kev tsim hluav taws xob muaj kev nyab xeeb thiab nyiaj txiag tau zoo lav.
Nws muaj kev vam meej thiab kev lag luam los hloov lub zog dynamic siab bearing nrog ob chav arc nto rocker hom dynamic thiab zoo li qub siab ua ke lubrication bearing, uas yog nquag hlawv vim tsis zoo concentricity ntawm phau ntawv journal thiab lwm yam laj thawj. Nws tsim nyog siv rau kev siv hauv kev tsim thiab tsim cov tshiab steel pob mills thiab kev hloov pauv ntawm cov qub steel pob mills uas tau ua haujlwm rau lub sijhawm ntev.
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