Mabearing ndi mbali zofunika kwambiri zothandizira ma mota. Nthawi zonse, kutentha kwa mabearing a mota kukapitirira 95°C ndipo kutentha kwa mabearing otsetsereka kukapitirira 80°C, mabearing amatenthedwa kwambiri.
Kuchuluka kwa mpweya woipa pamene injini ikuyenda ndi vuto lofala, ndipo zifukwa zake zimakhala zosiyanasiyana, ndipo nthawi zina zimakhala zovuta kuzizindikira molondola, kotero nthawi zambiri, ngati chithandizo sichinachitike pa nthawi yake, zotsatira zake nthawi zambiri zimakhala kuwonongeka kwakukulu kwa injini, zomwe zimapangitsa kuti mota ikhale ndi moyo wautali, zomwe zimakhudza ntchito ndi kupanga. Fotokozani mwachidule mkhalidwe weniweni, zifukwa ndi njira zochizira kutentha kwa mpweya woipa.
1. Zifukwa ndi njira zochizira kutentha kwambiri kwa mabearing a mota:
1. Chogwirira chozungulira sichinakhazikitsidwe bwino, kulekerera koyenera ndi kolimba kwambiri kapena komasuka kwambiri.
Yankho: Kugwira ntchito bwino kwa ma rolling bearing kumadalira osati kokha pa kulondola kwa kupanga kwa bearing yokha, komanso pa kulondola kwa miyeso, kulekerera mawonekedwe ndi kukhwima kwa shaft ndi dzenje lomwe likugwirizana nalo, momwe mwasankha komanso ngati kukhazikitsa kuli kolondola kapena ayi.
Mu ma mota opingasa, ma rolling bearings osonkhanitsidwa bwino amangonyamula mphamvu ya radial, koma ngati kuyenerera pakati pa mphete yamkati ya bearing ndi shaft kuli kolimba kwambiri, kapena kuyenerera pakati pa mphete yakunja ya bearing ndi chivundikiro chakumapeto kuli kolimba kwambiri, ndiko kuti, pamene kulekerera kuli kwakukulu kwambiri, ndiye kuti pambuyo pa kusonkhana, malo operekera bearing adzakhala ochepa kwambiri, nthawi zina pafupifupi zero. Kuzungulira sikusinthasintha motere, ndipo kumapanga kutentha panthawi yogwira ntchito.
Ngati kuyenererana pakati pa mphete yamkati ya bearing ndi shaft kuli komasuka kwambiri, kapena mphete yakunja ya bearing ndi chivundikiro chakumapeto kuli komasuka kwambiri, ndiye kuti mphete yamkati ya bearing ndi shaft, kapena mphete yakunja ya bearing ndi chivundikiro chakumapeto, zidzazungulirana, zomwe zimapangitsa kuti pakhale kukangana ndi kutentha, zomwe zimapangitsa kuti bearing iwonongeke kwambiri. Nthawi zambiri, malo olekerera a m'mimba mwake wa mphete yamkati ya bearing ngati gawo lofotokozera amasunthidwa pansi pa mzere wa zero mu standard, ndipo malo olekerera a shaft yomweyo ndi mphete yamkati ya bearing amapanga kuyenerera komwe kumakhala kolimba kwambiri kuposa komwe kumapangidwa ndi dzenje lofotokozera lonse.
2. Kusankha kosayenera mafuta opaka kapena kugwiritsa ntchito ndi kukonza mosayenera, mafuta opaka osakwanira kapena owonongeka, kapena kusakaniza ndi fumbi ndi zonyansa kungayambitse kutentha kwa bearing.
Yankho: Kuonjezera mafuta ochulukirapo kapena ochepa kwambiri kungayambitsenso kutentha kwa bearing, chifukwa mafuta akakhala ambiri, padzakhala kukangana kwakukulu pakati pa gawo lozungulira la bearing ndi mafuta, ndipo mafuta akawonjezeredwa pang'ono kwambiri, kuuma kungachitike. Kukangana ndi kutentha. Chifukwa chake, kuchuluka kwa mafuta kuyenera kusinthidwa kuti kukhale pafupifupi 1/2-2/3 ya kuchuluka kwa malo a bearing chamber. Mafuta opaka mafuta osayenera kapena owonongeka ayenera kutsukidwa ndikusinthidwa ndi mafuta oyera oyenera.
3. Mpata wa axial pakati pa chivundikiro chakunja cha mota ndi bwalo lakunja la chogwirira chozungulira ndi wochepa kwambiri.
Yankho: Ma mota akuluakulu ndi apakatikati nthawi zambiri amagwiritsa ntchito ma bearing a mpira kumapeto kwa non-shaft. Ma roller bearing amagwiritsidwa ntchito kumapeto kwa shaft extension, kotero kuti rotor ikatenthedwa ndi kukulitsidwa, imatha kutalikitsidwa momasuka. Popeza malekezero onse awiri a mota yaying'ono amagwiritsa ntchito ma bearing a mpira, payenera kukhala mpata woyenera pakati pa chivundikiro chakunja cha bearing ndi mphete yakunja ya bearing, apo ayi, bearing ikhoza kutentha chifukwa cha kutalika kwambiri kwa kutentha mbali ya axial. Izi zikachitika, chivundikiro chakutsogolo kapena chakumbuyo chiyenera kuchotsedwa pang'ono, kapena pepala lopyapyala liyenera kuyikidwa pakati pa chivundikiro chakunja cha bearing ndi chivundikiro chakumbuyo, kuti pakhale malo okwanira pakati pa chivundikiro chakunja cha bearing kumapeto kwina ndi mphete yakunja ya bearing. Kutsegula.
4. Zivundikiro za kumapeto kapena zipewa zoperekera mbali zonse ziwiri za mota sizinakhazikitsidwe bwino.
Yankho: Ngati zophimba kumapeto kapena zophimba zotengera mbali zonse ziwiri za mota sizinayikidwe motsatizana kapena mipata si yolimba, mipirayo idzapatuka panjira ndikuzungulira kuti ipange kutentha. Zophimba kumapeto kapena zophimba zotengera mbali zonse ziwiri ziyenera kubwezeretsedwanso mosalala, ndikuzunguliridwa mofanana ndikukhazikika ndi mabolts.
5. Mipira, ma rollers, mphete zamkati ndi zakunja, ndi zitseko za mipira zimawonongeka kwambiri kapena zitsulo zimachotsedwa.
Yankho: Chotengeracho chiyenera kusinthidwa panthawiyi.
6. Kulumikizana koyipa ndi makina opakira katundu.
Zifukwa zazikulu ndi izi: kusalumikizana bwino kwa cholumikizira, kukoka kwambiri kwa lamba, kusagwirizana ndi mzere wa makina onyamula katundu, m'mimba mwake wa pulley wochepa kwambiri, kutali kwambiri ndi kuberekera kwa pulley, katundu wochuluka wa axial kapena radial, ndi zina zotero.
Yankho: Konzani kulumikizana kolakwika kuti mupewe mphamvu yolakwika pa bearing.
7. Mzere wapindika.
Yankho: Pakadali pano, mphamvu pa bearing si mphamvu yeniyeni ya radial, zomwe zimapangitsa bearing kutentha. Yesani kuwongola shaft yokhota kapena kuisintha ndi bearing yatsopano.
2. Kodi mungateteze bwanji chotengera cha injini kuti chisatenthe kwambiri?
Ikhoza kuganiziridwa kuti ikwirire chinthu choyezera kutentha pafupi ndi bearing, kenako nkuteteza bearing kudzera mu control circuit. Kawirikawiri, mota imakhala ndi chinthu choyezera kutentha (monga thermistor) mkati mwa mota, kenako mawaya awiri amatuluka kuchokera mkati kuti alumikizane ndi choteteza chapadera, ndipo choteteza chimatumiza magetsi osasintha a 24V, pamene bearing ya mota ikapitirira mtengo wokhazikika wa choteteza, imagwa ndikuchita gawo loteteza. Pakadali pano, opanga magalimoto ambiri mdziko muno amagwiritsa ntchito njira yotetezera iyi.
Nthawi yotumizira: Juni-25-2023
