Intshayelelo malunga nePistons

Iinjini zifana 'nentliziyo' yeemoto kwaye ipiston inokuqondwa 'njengeziko lesiseko' se-injini. Ingaphakathi lepiston luyilo olwenziweyo oluthandayo umnqwazi, imingxunya ejikelezileyo kwiziphelo zombini inxulunyaniswe nepini ye-piston, isikhonkwane se-piston sidityaniswe kwisiphelo esincinci sentonga yokuqhagamshela, kunye nesiphelo esikhulu sentonga yokudibanisa iqhagamshelwe kwi-crankshaft, eguqula ukuphindaphinda kwesishukumisi sepiston ukuya kwisangqa setyhula se-crankshaft.

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Imeko yokusebenza

Imeko yokusebenza kweepiston imbi kakhulu. Iipiston zisebenza phantsi kobushushu obuphezulu, uxinzelelo oluphezulu, isantya esiphezulu kunye neemeko zokuthambisa ezibi. IPiston inxibelelana ngqo negesi enobushushu obuphezulu, kwaye amaqondo obushushu kwangoko anokufikelela ngaphezulu kwe-2500K. Ke ngoko, ipiston iyavutha kakhulu kwaye imeko yokuchithwa kobushushu ihlwempuzeke kakhulu. Ngenxa yoko, iipiston zisebenza kubushushu obuphezulu kakhulu, kunye phezulu kufikelela kuma-600 ~ 700K, kwaye ukuhanjiswa kweqondo lobushushu akulingani kakhulu. 

I-piston ephezulu ithwala uxinzelelo olukhulu lwegesi, ngakumbi ngexesha lokusebenza, eliphezulu njenge-3 ~ 5MPa yeinjini zepetroli kunye ne-6 ~ 9MPa yeinjini zedizili. Oku kwenza iipiston zivelise ifuthe kwaye zithwale uxinzelelo lwecala. I-piston iyahamba ngapha nangapha kwisilinda ngesantya esiphezulu (8 ~ 12m / s), kwaye isantya sihlala sitshintsha. Oku kudala amandla amakhulu e-inertia, enza ukuba i-piston ixhomekeke kwisixa esikhulu somthwalo owongezelelweyo. Ukusebenza phantsi kwezi meko zingqwabalala kwenza ukuba iipiston zikhubazeke kwaye zenze ukuguga kweepiston zikhawuleze, kunye nokuvelisa umthwalo owongezelelekileyo kunye noxinzelelo lobushushu kunye nokufakwa kumhlwa ngamachiza yigesi. Ipiston enobubanzi obuyi-90 mm, umzekelo, yayiya kuthwala malunga neetoni ezintathu zoxinzelelo. Ukunciphisa ubunzima kunye namandla e-inertia, i-piston ngokubanzi yenziwe nge-aluminium alloy, ezinye iipiston zomdyarho ziyenziwe ezenza zomelele kwaye zomelele.

Ngaphandle kweemeko zomsebenzi ezigqithileyo, yenye yezona zixakeke kakhulu enjini. Umphezulu wayo, intloko yesilinda kunye nomgqomo wesilinda wenza igumbi lokutsha. Kwaye ikwadlala indima ekuphefumlweni, ekucinezelweni nasekukhupheni irhasi.

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Amakhonkco episton

I-piston nganye inemibimbi emithathu yokufakelwa kwamakhonkco omoya amabini kunye neringi yeoyile kunye nemisesane yomoya ephezulu. Ngexesha lokudibana, ukuvulwa kweeringi zomoya ezimbini kufuneka kugxadazelwe ukuze zisebenze njengetywina. Umsebenzi ophambili wesangqa seoyile kukukrola ioyile egqithileyo ethe tyaba kudonga lwesilinda kwaye iyenze ilingane. Okwangoku, izinto ezisetyenziswa ngokubanzi zeringi yeepiston zibandakanya isinyithi esikumgangatho ophezulu, i-ductile yentsimbi, i-alloy cast iron njalo njalo.

Ukongeza, ngenxa yeendawo ezahlukeneyo zamasongo episton, unyango lomphezulu nalo lwahlukile. Umphezulu wangaphandle wesangqa sokuqala se-piston uhlala unyinyiwe nge-chrome okanye unyango lwe-molybdenum, ikakhulu ukulungiselela ukuphucula ukuthambisa kunye nokunxiba ukunganyangeki. Amanye amakhonkco episton ahlala edityaniswe nge-tin okanye nge-phosphated ukuphucula ukuxhathisa kokunxiba.

 


Ixesha Post: Jul-16-2020