Isingeniso Mayelana namaPiston

Izinjini zifana 'nenhliziyo' yezimoto futhi i-piston ingaqondwa njenge 'isikhungo esiyinsika' yenjini. Ingaphakathi le-piston liwumklamo ongenalutho othanda isigqoko, izimbobo eziyindilinga emikhawulweni yomibili zixhunywe kuphini le-piston, iphini le-piston lixhunywe ekugcineni okuncane kwenduku yokuxhuma, futhi ekugcineni okukhulu kwenduku yokuxhuma ixhunywe ku-crankshaft, eguqula ukunyakaza okuphindayo kwe-piston kukunyakaza okuyindilinga kwe-crankshaft.

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Isimo sokusebenza

Isimo sokusebenza kwama-piston sibi kakhulu. Ama-piston asebenza ngaphansi kwezinga lokushisa okuphezulu, umfutho ophakeme, isivinini esikhulu nezimo zokuthambisa ezingezinhle. I-piston ixhumana ngqo negesi eshisa kakhulu, kanti izinga lokushisa elisheshayo lingafinyelela ngaphezu kuka-2500K. Ngakho-ke, i-piston ishiswa kakhulu futhi isimo sokushabalalisa ukushisa sibi kakhulu. Ngenxa yalokho, ama-piston asebenza ezingeni lokushisa eliphakeme kakhulu, phezulu kufinyelela kuma-600 ~ 700K, kanti ukwabiwa kwamazinga okushisa akulingani kakhulu. 

Ingaphezulu le-piston linengcindezi enkulu yegesi, ikakhulukazi ngesikhathi sokusebenza, elifinyelela ku-3 ~ 5MPa yezinjini zikaphethiloli kanye no-6 ~ 9MPa wezinjini zikadizili. Lokhu kwenza ama-piston akhiqize umthelela futhi athwale umphumela wengcindezi eseceleni. I-piston iya emuva naphambili kusilinda ngejubane elikhulu (8 ~ 12m / s), futhi ijubane liyashintsha njalo. Lokhu kudala amandla amakhulu we-inertia, enza ukuthi i-piston incike enanini elikhulu lomthwalo owengeziwe. Ukusebenza ngaphansi kwalezi zimo ezinzima kwenza ukuthi ama-piston akhubazeke futhi enze ukudleka kwama-piston asheshise, kanye nokukhiqiza imithwalo eyengeziwe nokucindezela kokushisa nokufakwa ukugqwala kwamakhemikhali ngegesi. Isibonelo, ipiston enobubanzi obungu-90 mm, ibingathwala cishe ingcindezi engamathani amathathu. Ukuze wehlise isisindo namandla e-inertia, i-piston imvamisa yenziwa nge-aluminium alloy, amanye ama-piston wokugijimela ayenziwa okwenza aqine futhi aqine.

Ngaphandle kwezimo zokusebenza ezeqisayo, ingelinye lamatasa kakhulu enjinini. Ingaphezulu layo, ikhanda lesilinda nomgqomo wesilinda kwakha igumbi lokushisa umlilo. Futhi ibuye ibambe iqhaza ekuphefumuleni, ekucindezeleni nasekuqedeni igesi.

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Amasongo episton

I-piston ngayinye inemibimbi emithathu yokufakwa kwamasongo omoya amabili nendandatho kawoyela namasongo omoya phezulu. Ngesikhathi sokuhlangana, ukuvuleka kwamasongo omoya amabili kufanele kumiswe ukuze kusebenze njengezimpawu. Umsebenzi oyinhloko wendandatho kawoyela ukususa uwoyela oweqile owafafazwa odongeni lwesilinda nokwenza ulingane. Njengamanje, izinto ezisetshenziswa kabanzi zamasongo e-piston zifaka phakathi i-high quality grey cast iron, i-ductile cast iron, i-alloy cast iron nokunye.

Ngaphezu kwalokho, ngenxa yezindawo ezahlukahlukene zamasongo e-piston, ukwelashwa kwendawo nakho kwehlukile. Ubuso bangaphandle bendandatho yokuqala ye-piston imvamisa ukwelashwa kokufafaza i-chrome-plated noma i-molybdenum, ikakhulukazi ukuze kwenziwe ngcono ukuthambisa nokugqoka ukumelana. Amanye amasongo e-piston avamise ukufakwa ngothayela noma nge-phosphated ukuthuthukisa ukumelana nokugqoka.

 


Isikhathi Iposi: Jul-16-2020