Kufuneka ndenze ntoni ukuba kukho ukuvuza ngaphakathi kwevalve yokutshekisha

Khangela iivalvuzimveliso zolawulo lwelwelo ezibalulekileyo kushishino lwangoku kwaye ngoku yenye yezona ntlobo zisetyenziswa kakhulu iivalvu. Iimveliso zayo eziphuma kuyo zibanzi kakhulu, kubandakanywa iintlobo ezahlukeneyo zeevalvu ezifana nodidi olusikiweyo, uhlobo olulawulayo, uhlobo lwe-throttling, uhlobo lwenaliti, kunye nohlobo lokuphuma kwe-throttling cut-off, olunokuthi lunqumle ngokukhawuleza okuphakathi kwaye lulawule kwaye luthintele okuphakathi kumbhobho.

Umkhombandlela wofakelo wekhangela iivalveyahlulahlulwe ngokubanzi yaba ziindidi ezimbini, enye kufakelo oluthe tye, oko kukuthi, isiqu sevalve sevalve sikwicala elithe nkqo, kwaye i-axis yeshaneli yevalve ihambelana nenqwelomoya ethe tye. Olunye uhlobo lukwalathiso lofakelo oluthe nkqo, apho isiqu sevalvu sinxusene nenqwelomoya ethe tyaba kwaye i-axis yevalve ikwi-perpendicular kwinqwelomoya ethe tye. Isalathiso sofakelo lweevalvu sichongwa luyilo lwemibhobho yeziko loyilo, nto leyo ethetha ukuba ukufakela okuthe tyaba kunye nokuthe nkqo ziindlela eziqhelekileyo nezingenakuphepheka zofakelo. Emva kokuba ukuveliswa kunye nokuhlanganiswa kwevalve yeglowubhu kugqityiwe, uvavanyo lokusebenza lokutywina kufuneka luqhutywe, kwaye kuphela emva kokuphumelela uvavanyo lunokuthunyelwa. Ngesiqhelo, ivalve inentsebenzo entle yokutywina ngexesha lovavanyo, kodwa iingxaki zokuvuza kwangaphakathi zinokuthi zenzeke xa ivalve idityaniswe kumbhobho othe nkqo.

Umphezulu wokutywina wekhangela iivalveidla ngokwahlulwa ibe ziindidi ezimbini: ukutywina okucaba kunye nokutywinwa okucolekileyo. Ngokusekwe kwingxelo evela kwizicelo zobunjineli, kwimeko yofakelo oluthe nkqo lweevalvu zokutshekisha, ukuvuza kuhlala kusenzeka kwiivalvu zeglowubhu zohlobo lwecone, ezidla ngokuvuza ngexesha lokuqala emva kofakelo. Nangona kunjalo, ubomi benkonzo yeevalvu zeglowubhu yesitywina esisicaba ezifakwe ngokuthe tye nathe nkqo ziyafana.

Ubudlelwane besakhiwo samacandelo angaphakathi kwi-valve yokutshekisha kukuba isiphelo esiphezulu se-valve stem sinyanzeliswa ngokupakisha kunye nesihlalo sokutywina esiphezulu, kwaye isiphelo esisezantsi se-valve idityaniswe kwi-disc ye-valve ngokusebenzisa i-clearance fit. Umphezulu wokutywina wesiphelo esisezantsi sediski yevalve udibana nomphezulu wokutywina wesihlalo sevalve ukwenza itywina. Xa isiqu sevalve sityhala idisc yevalve ukuya kwisitulo sevalvu, kunokubakho unxibelelwano oluhle phakathi komphezulu wokutywina wesihlalo sevalve kunye nediski yevalvu. I-axis yekhowuni yokutywina yediskhi yevalve iyatenxa kwi-axis yekhowuni yokutywina yesitulo sevalve. Xa isiqu sevalve sityhala idisc yevalve ukuya kwisihlalo sevalve, indawo yokutywina ayinakho ukulungelelaniswa kwaye itywine ngokuzenzekelayo, okukhokelela ekuvuzeni. Ukuthambekela kwediski yevalve yeyona nto iphambili ebangela ukuvuza kwangaphakathi kwiivalvu. Kukho izizathu ezibini zokuthambekela okugqithisileyo kwediski yevalve. Okokuqala, kukho isithuba sendibano phakathi kwediski yevalve kunye nesiqu sevalve, kwaye intloko yediski yevalvu iya kuthambeka ezantsi ngenxa yomxhuzulane; Umcimbi wesibini kukuba xa i-valve stem ibekwe ngokuthe tye, iba yi-cantilever beam. Ngenxa yomxhuzulane, isiqu sevalve singena kwi-deformation yokugobela ezantsi, nto leyo eyenza kube mandundu ngakumbi ukuthambeka kwediski yevalve.