Yog Qhov Kev Ua Tau Zoo ntawm Lub Crankshaft yog qhov tseem ceeb cuam tshuam rau lub neej ntawm lub tsheb
Mar 14, 2023| Crankshaft yog ib qho ntawm cov khoom tseem ceeb ntawm lub cav tsheb, thiab cov ntaub ntawv tsis ua haujlwm feem ntau yog khoov qaug zog tawg thiab cov ntawv sau. Yog li ntawd, cov khoom ntawm crankshaft yuav tsum muaj siab rigidity, qaug zog, thiab zoo hnav tsis kam, thiab nws cov kev ua tau zoo cuam tshuam rau lub neej ntawm lub tsheb. Lub crankshaft yog raug rau cov loads loj thiab tas li hloov khoov lub sijhawm thiab torques thaum lub sijhawm ua haujlwm. Yog li, cia peb saib seb qhov kev ua tau zoo ntawm lub crankshaft yog qhov tseem ceeb cuam tshuam rau lub neej ntawm lub tsheb!
Txoj haujlwm ua haujlwm ntawm crankshaft
Raws li lub ntsiab load-bearing Cheebtsam ntawm ib tug engine, qaug zog tsis ua hauj lwm ntawm lub crankshaft yog heev heev nyob rau hauv cov nqe lus ntawm hlau qaug zog tsis ua hauj lwm (piv txwv li, dabtsi yog khoov qaug zog tsis ua hauj lwm thiab torsional qaug zog tsis ua hauj lwm), thiab ces txhim kho mus rau lub crank caj npab. Twisted tawg tshwm sim nyob rau hauv tsis zoo machined roj qhov thiab fillets thiab tsim thaum uas tig mus rau lub axis. Hlau qaug zog tsis ua hauj lwm yog qhov tshwm sim ntawm qhov kev ua ntawm kev ntxhov siab hloov pauv uas hloov pauv raws sijhawm. Kev txheeb xyuas ntawm crankshaft tawg qhia tau hais tias yav dhau los muaj qhov tshwm sim ntau dua qhov tshwm sim tom kawg. Bending qaug zog tawg ua ntej tshwm sim nyob rau hauv phau ntawv journal (crank pin) ntawm tus pas txuas txuas los yog phau ntawv xov xwm fillet ntawm lub ntsiab ncej, thiab li ntawm 80 feem pua ntawm lawv yog tshwm sim los ntawm bending qaug zog.
Crankshaft manufacturing txheej txheem
Tam sim no, muaj ob hom khoom siv rau tsheb cav crankshafts: nodular cam khwb cia hlau thiab hlau. Nws tuaj yeem txhim kho lub zog qaug zog, hardness, thiab hnav tsis kam ntawm crankshaft. Tus nqi ntawm nodular cam khwb cia hlau crankshafts tsuas yog hais txog 1/3 ntawm cov quenched thiab tempered steel crankshafts. Nodular cam khwb cia hlau muaj kev ua haujlwm zoo thiab tuaj yeem tau txais cov qauv zoo tagnrho. Nws tau txais ntau yam kev kho cua sov thiab kev kho kom muaj zog saum npoo zoo ib yam li steel crankshafts, suav txog 90 feem pua hauv Tebchaws Meskas, 85 feem pua hauv tebchaws Askiv, thiab 60 feem pua hauv Nyiv. Tsis tas li ntawd, lub teb chaws Yelemees, Belgium, thiab lwm lub tebchaws kuj tau txais ntau tus lej. Cov qauv ntawm kev siv cov hlua hlau crankshafts hauv Suav teb yog qhov pom tseeb dua, yog li cov hlau hlau crankshaft tau dav siv hauv tsev thiab txawv teb chaws. Kev txheeb cais qhia tau hais tias qhov feem ntawm lub cav crankshafts ua los ntawm nodular cam khwb cia hlau yog tshaj 85 feem pua ntawm nruab nrab thiab me zog diesel cav crankshafts ua los ntawm nodular cam khwb cia hlau, thiab cav crankshafts nrog ib tug muaj zog tshaj 160kW feem ntau siv forged steel crankshafts.
Cov laj thawj tseem ceeb ntawm crankshaft puas
1) Kev ua kom tsis zoo, overload, thiab overload ntawm cov roj cav tom qab siv mus ntev tau ua rau lub sijhawm ua haujlwm ntev ntawm lub cav thiab hlawv ntawm cov kabmob. Lub crankshaft yog hnav tsis zoo vim yog hluav taws kub ntawm cov vuas cav.
2) Tom qab kho lub cav, lub tsheb tsis dhau lub sijhawm hnav. Nyob rau hauv lwm yam lus, overload ncua kev kawm ntawv, lub sij hawm ntev overload ua hauj lwm ntawm lub cav, thiab crankshaft load tshaj qhov tso cai txwv.
3) Kev siv cov txheej txheem vuam rau crankshaft txij nkawm tau ua rau muaj kev vibration tseem ceeb ntawm lub cav, cuam tshuam lub zog sib npaug ntawm lub crankshaft, thiab tsis tau kuaj xyuas qhov sib npaug, ua rau muaj kev tsis txaus siab thiab tawg ntawm lub crankshaft.
4) Vim yog txoj kev tsis zoo thiab kev thauj khoom hnyav thiab dhau ntawm lub tsheb, lub cav feem ntau nyob rau hauv qhov txwv kev sib hloov ceev ntawm torsional kev vibration, thiab lub shock absorber tsis ua hauj lwm, ua rau torsional vibration qaug zog puas tsuaj thiab tawg ntawm lub crankshaft.
Kev ceev faj rau kev kho crankshaft
【1】 Thaum lub sij hawm tu lub crankshaft, xyuas kom meej tias qhov haum clearance ntawm lub ntsiab bearing shells thiab nruab nrab ntawm lub ntsiab bearing shells, thiab nruab nrab ntawm lub connector rod journal thiab lub connecting pas nrig bearing shells yog nyob rau hauv qhov kev tso cai. Ua tib zoo tshuaj xyuas lub crankshaft rau qhov tsis xws luag xws li tawg, khoov, thiab twisting, thiab xyuas qhov hnav ntawm lub ntsiab bearing shells thiab txuas cov pas nrig bearing shells.
【2】 Crankshaft tawg feem ntau tshwm sim nyob rau hauv kev hloov pauv fillet ntawm lub crankshaft caj npab thiab phau ntawv journal los yog nyob rau hauv cov roj qhov nyob rau hauv phau ntawv journal.
【3】 Thaum kho thiab sib dhos lub crankshaft, xyuas kom meej tias lub flywheel ua haujlwm zoo.
【4】 Lub crankshaft yuav tsum raug tshuaj xyuas tom qab muaj xwm txheej loj xws li cov pobzeb hlawv thiab lub tog raj kheej tawm tsam tshwm sim hauv cov tshuab hluav taws xob sab hauv.