Kodi chitsogozo cha valavu yagalimoto chimatanthauza chiyani
Ntchito ya chitsogozo cha valavu ndi kutsogolera kayendedwe ka mavalavu, kuonetsetsa kuti mavalavuwo akuchita mayendedwe obwerezabwereza, kulola mavalavu ndi mphete za mipando ya valavu kuti zigwirizane bwino, ndikusamutsa kutentha kwa tsinde la valavu kupita ku mutu wa silinda.
Kutentha kwa ntchito ya chitsogozo cha valavu kumakhala kokwera kwambiri, pafupifupi 200℃. Pamene chitsinde cha valavu chikuyenda mu chubu chotsogolera, chimadzozedwa ndi mafuta a injini omwe amatuluka kuchokera mu chitoliro cha valavu, motero chimatha kutha. Chifukwa chake, zipangizo zachitsulo chosungunuka kapena ufa zokhala ndi mphamvu zodzitsetsereka nthawi zambiri zimagwiritsidwa ntchito popanga ziwalo zosiyanasiyana, zomwe zimakanikizidwa m'mabowo a chitsogozo cha valavu pamutu wa silinda ndi cholumikizira china kuti zisagwe. Mainjini ena amagwiritsa ntchito mphete zosungira kuti akonze ndikuyika zitsogozo za valavu kuti zisamasuke.
Gawo la pansi la chitsogozo cha valavu limafikira m'mitsempha yolowera ndi yotulutsa mpweya. Pofuna kupewa kukana kwa mpweya, bwalo lakunja la kumapeto kotambasula limapangidwa kukhala mawonekedwe a conical. Pali mpata wa 0.05 mpaka 0.12mm pakati pa chitsogozo cha valavu ndi tsinde la valavu, zomwe zimathandiza kuti tsinde la valavu liziyenda momasuka mkati mwa chitsogozo.
Chitsogozo cha mavavu chimathandizira ndi kutsogolera mavavu omwe amayenda mmbuyo ndi mtsogolo mkati mwake, kuonetsetsa kuti mavavu ndi mipando ya mavavu imatha kulowa bwino, komanso imathandizira kutentha.
Pali mitundu iwiri ya malangizo a ma valavu: mtundu wophatikizika ndi mtundu wophatikizika. Malangizo a valavu wophatikizika amayendetsa mwachindunji dzenje la tsinde la valavu pamutu wa silinda. Malangizo a valavu wophatikizika amakanikizidwa mu chubu chozungulira kudzera mu dzenje lotsogolera pamutu wa silinda ndi kulowerera kwa 0.015 mpaka 0.065mm.
Ma valavu ena otsogolera ali ndi mipata yozungulira yomwe imapangidwa pamwamba pa cylindrical, yomwe imayikidwa ndi mphete zosungira kuti ziyike, zomwe zimaletsa kuya kwa mbali yapansi kupita ku njira yolowera mpweya ndikuletsa kuti isamasuke.
Kawirikawiri pamakhala malo okwana a 0.05 mpaka 0.12mm pakati pa tsinde la valavu ndi chowongolera valavu. Amathiridwa mafuta ndi mafuta a injini omwe amatuluka kuchokera ku ziwalo zotumizira valavu.
Ngati mpata pakati pa tsinde la valavu ndi chitsogozo cha valavu ndi wochepa kwambiri, n'zosavuta kuti tsinde la valavu lizimirire ndikukhala ndi kutseka kosayenera, zomwe zingayambitse kutopa kwa valavu ndi kuchepa kwa magwiridwe antchito amagetsi, kuchepetsa ndalama komanso kutulutsa mpweya woipa.
Ngati kusiyana pakati pa tsinde la valavu ndi chitsogozo cha valavu kuli kwakukulu kwambiri, kungayambitse zochitika zachilendo zotsatirazi:
Mpando wa valavu sukhazikika, magwiridwe antchito otsekera amachepa, ndipo umatha mofulumira kwambiri, zomwe zimapangitsa kuti mavalavu azitentha komanso mphamvu yamagetsi ichepe, ndalama zoyendetsera ntchito, komanso mpweya woipa uchepe.
Kutuluka kwa mpweya mu dongosolo lolowera mpweya kumapangitsa kuti chisakanizo cha injini ya petulo chikhale chocheperako.
Mafuta ambiri a injini amatsikira m'mipata kupita ku chipinda choyaka moto kapena njira yodutsa mpweya (makamaka panthawi yolowetsa mafuta), zomwe zimapangitsa kuti mafuta a injini agwiritsidwe ntchito kwambiri, utsi wabuluu utuluke, komanso kupanga mpweya woipa mwachangu.
Pa nthawi yotulutsa utsi, mpweya wotuluka umalowa mu crankcase kudzera pakati pa tsinde la valavu yotulutsa utsi ndi chitsogozo cha valavu.
Pamene mphamvu ya mpweya wotuluka m'chitsime chotulutsa mpweya ili yotsika kuposa ya mkati mwa chimbudzi, mafuta a injini amalowa mu mpweya wotuluka kudzera pakati pa tsinde la mpweya wotuluka ndi chitsogozo cha mpweya wotuluka.
Chifukwa cha utsi wabuluu panthawi yoyambitsa injini nthawi zambiri chimakhala chakuti mpata wa chitsogozo cha valavu yotulutsa mpweya ndi waukulu kwambiri. Makinawo akaima, mafuta amalowa m'mpata wa chitsogozo cha valavu yotulutsa mpweya kupita ku chipinda choyaka moto ndikumamatira ku manifold a utsi, ndipo amatenthedwa panthawi yoyambitsa injini. Chochitikachi chidzachepa kapena kutha pamene kutentha kwa injini kukukwera.
Ntchito ya chisindikizo cha mafuta a valavu ndikuletsa mafuta ambiri a injini kuti asalowe m'chipinda choyaka moto kapena m'njira zotulutsira mpweya ndi zotulutsira mpweya kudzera m'mpata pakati pa chitsogozo cha valavu ndi tsinde la valavu. Ndi mphete yotsekera ya rabara, yoyikidwa kumapeto kwa chitsogozo cha valavu. Ngati chisindikizo cha mafuta a valavu chawonongeka, mafuta ambiri a injini adzatsika kudzera m'mpata pakati pa valavu ndi chitsogozo cha valavu kupita m'chipinda choyaka moto kapena njira yopumira mpweya, zomwe zimapangitsa kuti mafuta a injini agwiritsidwe ntchito kwambiri. Izi zimaphatikizidwa ndi utsi wabuluu mu utsi ndipo zimathandizira kupanga carbon deposits pa mavalavu ndi m'chipinda choyaka moto.
Njira zosinthira ma valve guides zimagawidwa m'mitundu iwiri: kusintha ma valve guides ndi ma flanges ndikusintha ma valve guides opanda ma flanges.
Pali chitsogozo cha valavu ya flange
Pamene mutu wonse wa silinda watenthedwa kufika pa 100-150℃ mu bokosi lotentha lokhazikika, litulutseni ndikukweza mutu wa silinda. Gwiritsani ntchito chida chochotsera ndi kusonkhanitsa ma valve guide kuti mukankhire valve guide kumbali ya camshaft. Kenako ikani mafuta odzola ku O-ring yatsopano, ikani pa valve guide yatsopano, kenako gwiritsani ntchito chida chochotsera ndi kusonkhanitsa ma valve guide kuti mulowetse valve guide yatsopano kumbali ya camshaft. Pambuyo poti mutu wa silinda wazizira, tsanulirani mafuta odulidwa mkati mwa dzenje la valve guide, ndikugwiritsa ntchito valve guide reamer kuti muchepetse valve guide kuti mupeze malo oyenera pakati pa tsinde la valve ndi valve guide. Pomaliza, yeretsani bwino mutu wa silinda ndi petulo kapena mafuta a palafini ndipo mutha kuyiyika ndikugwiritsa ntchito. Sinthani valve guide popanda ma flanges
Musanachotse chitsogozo cha valavu pa silinda, yesani kutalika kwa gawo lowonekera ndi vernier caliper ndikulemba. Pamene mutu wa silinda watenthedwa kufika pa 100-150℃ mu bokosi lotentha lokhazikika, litulutseni ndikukweza mutu wa silinda. Gwiritsani ntchito chida chochotsera chitsogozo cha valavu ndi cholumikizira kuti mukankhire chitsogozo cha valavu kumbali ya camshaft. Kenako, gwiritsani ntchito chida chochotsera chitsogozo cha valavu ndi cholumikizira kuti muyendetse chitsogozo chatsopano cha valavu kumbali ya camshaft. Mukamayesa kutalika kwa gawo lowonekera la chitsogozo cha valavu, yendetsani chitsogozo chatsopano cha valavu pang'onopang'ono mpaka chikwaniritse zofunikira zomwe zafotokozedwa. Mutu wa silinda ukazizira, thirani mafuta odulira pang'ono m'dzenje lamkati la chitsogozo cha valavu ndikugwiritsa ntchito hinge ya chitsogozo cha valavu kuti muchepetse chitsogozo cha valavu kuti mupeze malo oyenera pakati pa tsinde la valavu ndi chitsogozo cha valavu. Pomaliza, yeretsani bwino mutu wa silinda ndi mafuta kapena mafuta a palafini ndipo mutha kuyiyika ndikugwiritsa ntchito.
Ngati mukufuna kudziwa zambiri, pitirizani kuwerenga nkhani zina patsamba lino!
Chonde tiimbireni foni ngati mukufuna zinthu zotere.
Malingaliro a kampani Zhuo Meng Shanghai Auto Co., Ltd. yadzipereka kugulitsa MG&MAXUSzida zamagalimoto zalandiridwa kugula.
