Hlola ama-valvengokuvamile zifakwa epayipini ukuze kuvinjelwe ukugeleza emuva.I-valve yokuhlola ngokuyisisekelo iyi-valve yendlela eyodwa, ukugeleza kungageleza ngokukhululekile ohlangothini olulodwa, kodwa uma ukugeleza kuzungeza, i-valve izovalwa ukuze kuvikelwe ipayipi, amanye ama-valve, amaphampu, njll. Uma uketshezi luzungeza kodwa isheke i-valve ayifakiwe, isando samanzi singenzeka.Isando samanzi sivame ukwenzeka ngamandla amakhulu futhi singalimaza kalula amapayipi noma izingxenye.
Izinto okufanele uzinake lapho ukhetha i-valve yokuhlola
Uma ukhetha i-valve yokuhlola, kubalulekile ukwenza ukuhlaziywa kwezindleko-inzuzo yesistimu ethile.Ukugxila okuvamile ukunciphisa izindleko ngenkathi uthola ukulahlekelwa kwengcindezi ephansi kakhulu, kodwa kuma-valve okuhlola, ukuphepha okuphezulu kulingana nokulahlekelwa kwengcindezi ephakeme.Ngakho-ke, ukuze kuqinisekiswe uhlelo lokuvikela i-valve yokuhlola, isistimu ngayinye idinga ukuhlolwa ngokwehlukana, futhi izici ezifana nengozi yesando samanzi, ukulahlekelwa kwengcindezi eyamukelekayo, kanye nemiphumela yezezimali yokufaka i-valve yokuhlola kufanele kucatshangelwe isando samanzi.
Ukuze ukwazi ukukhetha i-valve yokuhlola efanele yesicelo sakho, kunezindlela eziningi zokukhetha okufanele uzicabangele.Okokuqala, alukho uhlobo olulodwa lwe-valve yokuhlola oluyisinqumo esingcono kakhulu kuzo zonke izinhlelo zokusebenza, futhi indlela yokukhetha ayibalulekile ngokulinganayo kuzo zonke izimo.
Ezinye izindlela zokukhetha okufanele zicatshangelwe lapho ukhetha i-valve yokuhlola
Ezinye izinto ongase udinge ukuzicabangela ukuhambisana koketshezi, izici zokugeleza, ukulahlekelwa ikhanda, izici ezingewona umthelela, kanye nezindleko eziphelele zobunikazi.Ukuze uthole ukusebenza okuhle kakhulu, kubalulekile ukukhetha i-valve ngokuya nezici zezindlela ezihlukene zokufaka.
Uketshezi
Wonke ama-valve okuhlola asetshenziselwa ukwelapha amanzi kanye namanzi angcolile ahlanzekile, kodwa ukwelashwa kwamanzi angcolile/indle kungadala izinkinga ezithile.Lapho ukhetha ama-valve alolu ketshezi, kufanele ucabangele ukuthi ukuba khona kwezinto eziqinile kungase kuthinte kanjani ukusebenza kwama-valve.
Izici zokugeleza
Uma i-valve yokuhlola ivala ngokushesha okukhulu, kungenzeka ukuvimbela ukuqhuma.Kodwa-ke, ukuvala shaqa okusheshayo akuvimbeli ukuqhuma okwenzeka lapho iphampu iqala futhi ivaleka.Uma i-valve ivula (futhi ivala) ngokushesha, izinga lokugeleza lizoshintsha ngokuzumayo futhi ukuhlinzwa kungenzeka kakhulu.
Ukulahlekelwa ikhanda
Ukulahlekelwa kwekhanda le-valve kuwumsebenzi wesivinini soketshezi.Ukulahlekelwa kwekhanda le-valve kuthinteka yizimo zokugeleza kwesistimu kanye nendawo yangaphakathi ye-valve.I-geometry yomzimba we-valve kanye nomklamo wokuvala inquma indawo yokugeleza nge-valve ngakho-ke iphinde ithinte ukulahlekelwa kwekhanda.
Ukulahlekelwa kwekhanda okufanele kucatshangelwe inhlanganisela yekhanda elimile (okubangelwa umehluko wokuphakama) kanye nekhanda elixubekile (okubangelwa ipayipi ne-valve yangaphakathi).Ngalesi sisekelo, kunamafomula amaningi we-valve headloss kanye nenani elilinganiselwe.Okuvame kakhulu kungase kube i-coefficient yokugeleza yenani lamanzi adlula ku-valve ngokuhla kwengcindezi ethile esikhathini esithile.Kodwa uma kuqhathaniswa, kubhekwa ukuthi i-resistivity Kv iyisinqumo esingcono kakhulu.
Isamba sezindleko zobunikazi
Izindleko ze-valve yakho yokuhlola zingabandakanya okungaphezulu kwenani lokuthenga.Kokunye ukufakwa, izindleko ezibaluleke kakhulu mhlawumbe ukuthenga nokufaka, kodwa kwezinye izimo, izindleko zokunakekela noma zamandla zingabaluleke kakhulu noma zibaluleke nakakhulu.Uma usebenzisa izindleko njengenkomba yokukhetha i-valve yokuhlola, kufanele kucatshangelwe izindleko eziphelele ngesikhathi sokuphila kwevalvu.Ngokuvamile, ukwakheka kwe-valve kulula, izidingo zesondlo ziyancipha.
Izici ezingezona ze-slam
Hlola i-valvei-slam idala ukuthi ingcindezi yesistimu iguquguquke.Isinyathelo sokuqala kule nqubo ukubuyisela emuva ukugeleza lapho iphampu ima.Lokhu kungase kubangele ukugeleza okuthile emuva ngevalvu ngaphambi kokuba i-valve ifinyelele endaweni evalwe ngokugcwele.Khona-ke ukugeleza okubuyela emuva kuyavalwa, futhi ukuguqulwa kwezinga lokugeleza kuguqula amandla e-kinetic oketshezi abe yingcindezi.
I-slam izwakala njengomsindo owenziwe lapho i-disc noma ibhola le-valve yokuhlola ishaya isihlalo se-valve, futhi idala umsindo omkhulu.Kodwa-ke, lo msindo awubangelwa ukuvala ngokomzimba, kodwa ngamaza omsindo akhiqizwa ama-spikes okucindezela okwelula udonga lwamashubhu.Ukuze ugweme ukushaya ngokuphelele, i-valve yokuhlola kufanele ivalwe ngaphambi kokuba kwenzeke noma iyiphi isivinini esibuyela emuva.Ngeshwa, lokhu akuzange kwenzeke.I-geometry ye-valve inquma ukuthi kungakanani ukubuyela emuva okuzokwenzeka, ngakho-ke lapho i-valve ivala ngokushesha, i-slamming encane.
Isikhathi sokuthumela: May-14-2021
