Iyini isiphethu se-valve yemoto
Isiphethu se-valve yemoto siyingxenye ebalulekile yenjini yemoto, etholakala phakathi kwekhanda le-cylinder nesihlalo se-valve rod tail spring. Umsebenzi wayo oyinhloko uwukuqinisekisa ukuthi i-valve ihlezi ngesikhathi futhi ifakwe ngokuqinile ukuze ivimbele i-valve ukuthi ingashayi ngesikhathi sokudlidliza kwenjini, ngaleyo ndlela ibhubhise ukuvaleka kwayo.
Iziphethu zamavalvu ngokuvamile zenziwe ngensimbi yensimbi eyingxubevange yekhwalithi ephezulu futhi ziphathwa ngokushisa ukuze kwandiswe amandla azo okukhathala. Ukuze uvimbele ukugqwala kwentwasahlobo, indawo engaphezulu izoba yi-galvanized noma i-phosphating. Iziphetho zayo ezimbili kufanele zibe phansi futhi zibe yi-perpendicular ku-axis yasentwasahlobo ukuvimbela i-skew phakathi nenqubo yokusebenza.
Ukuklama nokukhethwa kwempahla yesiphethu se-valve kunomphumela obalulekile ekusebenzeni kwenjini. Ukuze ugweme ukuzwakala kwemisindo, izinjini zesimanje ngokuvamile zisebenzisa iziphethu zepitch eziguquguqukayo noma iziphethu ezifakwe kabili ezibekwe kahle. Umklamo wentwasahlobo ophindwe kabili uhlanganisa iziphethu ezimbili eziphendulwe ngokuphambene ngaphakathi nangaphandle. Ukuqina kwentwasahlobo kwangaphandle kukhulu, okungavimbela ngokuphumelelayo i-resonance, futhi lapho intwasahlobo eyodwa iphukile, enye ingaqhubeka nokusebenza ukuze kuqinisekiswe ukuvala okuvamile kwe-valve.
Isimiso sokusebenza se-valve spring ukuqinisekisa ukuthi i-valve ifakwe eduze kwesihlalo se-valve ngokunqoba amandla angenayo ngesikhathi senqubo yokuvala i-valve futhi ivimbele i-valve ekugxumeni ngaphansi komthwalo wengcindezi. Ngaphezu kwalokho, isiphethu se-valve singakwazi futhi ukulawula ukunyakaza kwe-valve ukugwema ukuhlukaniswa kwe-valve mechanism.
Kafushane, nakuba isiphethu se-valve sisincane enjinini, indima yayo ibalulekile ukuze kuqinisekiswe ukusebenza okujwayelekile nokusebenza okuzinzile kwenjini.
Indima eyinhloko ye-valve yemoto spring ihlanganisa izici ezilandelayo:
Qinisekisa ukuthi isihlalo se-valve esifike ngesikhathi kanye nokulingana okuqinile : isiphethu se-valve singaqinisekisa ukuthi i-valve ingafakwa iqine nesihlalo se-valve noma iringi yesihlalo sevalvu lapho ivaliwe, igweme i-valve ukuthi ingagxumi lapho injini idlidliza, ukuze igcine ivaleke kahle.
nqoba amandla angenayo : lapho i-valve ivuliwe, indlela ye-valve izokhiqiza amandla angenayo, isiphethu se-valve singanqoba la mandla angenayo ukuze kuqinisekiswe ukuthi izingxenye zokudlulisela zihlala zilawulwa yi-CAM futhi azihlukaniswanga komunye nomunye.
ukuvimbela i-resonance kanye ne-flutter : ukuze kuvinjwe i-valve spring resonance ohlelweni lokusebenza, ezinye izinjini zisebenzisa isakhiwo se-valve spring esiphindwe kabili, okuphambene nokujikeleza kwentwasahlobo okubili, okungahlehlisa ukudlidliza kwentwasahlobo komunye nomunye, kuthuthukise ukuzinza kwe-valve spring.
Amandla okukhathala athuthukisiwe nokuthembeka : Iziphethu zevalvu zivame ukwakhiwa ngocingo lwensimbi oluyingxubevange yekhwalithi ephezulu futhi ziphathwe ngokushisa ukuze zithuthukise ukumelana kwazo nokukhathala. Ukuvimbela ukugqwala, indawo engaphezulu ifakwe i-galvanized noma i-phosphating.
Zijwayelanise nengcindezi eguquguqukayo ephezulu kanye nokusebenza ngesivinini esikhulu : injini ibe namandla aphezulu, ukuthuthukiswa kwesivinini esikhulu, iziphethu zamavalvu zidinga ukumelana nengcindezi ephezulu kanye nesivinini sokuphendula esisheshayo. Ngakho-ke, ukuklama nokukhiqizwa kwama-valve spring kudinga izidingo zobuchwepheshe eziphakeme.
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