Kodi mafuta a injini amawira pa kutentha kotani?
Flash point ya mafuta a injini
Tiyeni tiyambe kuganizira nkhaniyi kuchokera kutentha kochepa kwa mfundo zitatu zomwe zatchulidwa m'ndime yoyamba ndipo tidzazikulitsa mu dongosolo lokwera. Popeza pa nkhani ya mafuta galimoto, n'zokayikitsa kuti n'zotheka kumvetsa kuti ndi ziti zomwe zimabwera poyamba.
Pamene kutentha kufika pafupifupi madigiri 210-240 (malingana ndi khalidwe m'munsi ndi zowonjezera phukusi), ndi kung'anima mfundo mafuta injini. Komanso, mawu oti "flash" amatanthauza mawonekedwe anthawi yochepa a lawi popanda kuyaka kotsatira.
Kutentha kwamoto kumatsimikiziridwa ndi njira yowotchera mu crucible yotseguka. Kuti tichite izi, mafuta amatsanuliridwa mu mbale yachitsulo yoyezera ndikutenthetsa popanda kugwiritsa ntchito lawi lotseguka (mwachitsanzo, pa chitofu chamagetsi). Kutentha kukafika pafupi ndi malo omwe akuyembekezeredwa, gwero lamoto lotseguka (nthawi zambiri chowotcha gasi) limayambitsidwa pa kukwera kulikonse kwa 1 digiri pamwamba pa crucible ndi mafuta. Ngati nthunzi yamafuta siyaka, crucible imatenthetsa ndi digiri imodzi. Ndi zina zotero mpaka kung'anima koyamba kupangidwa.
Kutentha kwakuya kumatchulidwa pa chizindikiro choterocho pa thermometer, pamene nthunzi zamafuta sizimangotuluka kamodzi, koma zimapitirizabe kuyaka. Ndiko kuti, mafuta akatenthedwa, nthunzi zoyaka zimatulutsidwa mwamphamvu kotero kuti lawi lamoto pamwamba pa crucible silizima. Pa avareji, chodabwitsa chofananira chimawonedwa 10-20 madigiri atafika ku flash point.
Pofotokoza momwe mafuta a injini amagwirira ntchito, ma flash point okha ndi omwe amadziwika. Popeza mu zochitika zenizeni kutentha kuyaka pafupifupi konse kufika. Osachepera m'lingaliro likafika pa lawi lotseguka, lalikulu.
Malo otentha a mafuta a injini
Mafuta amawiritsa pa kutentha pafupifupi 270-300 madigiri. Zithupsa mu chikhalidwe mfundo, ndiye, ndi kumasulidwa kwa thovu gasi. Apanso, chodabwitsa ichi ndi chosowa kwambiri pakukula kwa voliyumu yonse yamafuta. Mu sump, mafuta sadzafika kutentha uku, chifukwa injini idzalephera nthawi yayitali isanafike madigiri 200.
Kawirikawiri ang'onoang'ono accumulations mafuta chithupsa mu otentha mbali injini ndi ngati malfunction zoonekeratu mu injini kuyaka mkati. Mwachitsanzo, mu yamphamvu mutu mu mphako pafupi ndi mavavu utsi ngati vuto la makina kugawa gasi.
Chodabwitsa ichi chimakhala ndi zotsatira zoyipa kwambiri pakugwira ntchito kwamafuta. Mofanana, matope, mwaye kapena ma depositi amafuta amapangidwa. Zomwe zimaipitsa injiniyo ndipo zimatha kuyambitsa kutsekeka kwamafuta kapena njira zoyatsira mafuta.
Pamlingo wa mamolekyulu, kusintha kogwira kumachitika mumafuta kale pomwe kung'anima kwafika. Choyamba, tinthu tating'onoting'ono tating'ono timapangidwa kuchokera ku mafuta. Izi sizongoyambira zokha, komanso zida zodzaza. Zomwe zimasintha zokha zamafuta amafuta. Ndipo osati zabwino nthawi zonse. Kachiwiri, ndondomeko ya okosijeni imathamanga kwambiri. Ndipo ma oxides mumafuta a injini ndi achabechabe komanso owopsa. Chachitatu, njira yowotcha mafuta mu masilinda a injini imathandizira, chifukwa mafuta amasungunuka kwambiri ndipo amalowa m'zipinda zoyatsira mochulukira.
Zonsezi zimakhudza kwambiri gwero la injini. Choncho, kuti musabweretse mafuta ku chithupsa komanso kuti musakonze injini, m'pofunika kuyang'anitsitsa kutentha. Kukanika kulephera kwa dongosolo lozizira kapena zizindikiro zodziwikiratu za kutenthedwa kwamafuta (kuchuluka kwa sludge pansi pa chivundikiro cha valve ndi mu sump, kuthamangitsidwa kwamafuta opangira zinyalala, kununkhira kwamafuta otenthedwa pakugwira ntchito kwa injini), ndikofunikira kuzindikira ndi kuthetsa chomwe chayambitsa vutoli.
