i-valve yokhuseleko sisixhobo sokhuseleko esisetyenziselwa ukukhusela uxinzelelo kwisixhobo soxinzelelo ekugqithiseni ixabiso elivumelekileyo. Umsebenzi we-valve yokukhusela ufezekiswa yinkqubo yesenzo esilandelayo: Xa inkqubo ifikelela kuxinzelelo oluphezulu oluvumelekileyo, i-valve yokukhusela inokuvula ngokuchanekileyo, kwaye ifike ngokukhawuleza kubude bokuvula okulinganiselweyo, kwaye ikhuphe inani elilinganisiweyo lendawo yokusebenza; ivalve yokhuseleko ikwimeko evulekileyo Ukukhutshwa kufuneka kuzinzile; xa uxinzelelo lwenkqubo luwela kwixabiso elithile, i-valve yokhuseleko kufuneka ivalwe ngexesha, kwaye kwimeko evaliweyo, kufuneka igcinwe kuhlobo oluvaliweyo. Oku kulandelayo kuchaza iimfuno ezisisiseko zokusebenza kweevalvu zokhuseleko.
1. Vula ngokuchanekileyo
Ivalve yokhuseleko kufuneka ivuleleke ngokuthembekileyo kubude obuchaziweyo bokuvula phantsi koxinzelelo olumiselweyo kwaye ifikelele kumthamo ochaziweyo wokukhupha. Le yimfuno esisiseko yevalve yokhuseleko. Oko kukuthi, xa uxinzelelo lwe-inlet ye-valve yokhuseleko lufikelela kuxinzelelo olumiselweyo, i-valve yokhuseleko kufuneka ivule ngokuchanekileyo kwaye ifike ngokukhawuleza kubude obucacileyo bokuvula.
Xa uxinzelelo kwinkqubo lufikelela kuxinzelelo oluphezulu oluvumelekileyo, impendulo engabonakaliyo yevalve yokhuseleko ekunyukeni koxinzelelo iya kukhokelela kwiimeko ezinobungozi ezifana nokuqhaqha kunye nokulimala kweebhoyili, iinqanawa zoxinzelelo kunye nemibhobho. Ngokukodwa kwimidiya yegesi ecinezelayo, ingozi iphezulu.
Uxinzelelo olumiselweyo lwevalve yokhuseleko akufanele lube lukhulu kunexabiso loxinzelelo loyilo lwebhoyili, isitya soxinzelelo kunye nombhobho.
Ukuphambuka koxinzelelo olulungileyo lwevalve yokhuseleko luchazwe ngokucacileyo kwimimiselo kunye nemigangatho efanelekileyo. Xa i-valve yokhuseleko ilungelelaniswa kuxinzelelo lokumisela, ukuphambuka kwayo kufuneka kulawulwe ngokungqongqo ngaphakathi koluhlu oluchaziweyo.
2. Ukukhutshwa okuzinzileyo
Emva kokuba i-valve yokhuseleko ifikelele ekuphakameni okuchaziweyo okuvulekileyo, igcina i-stable state dischalled state kwaye inokukhupha inani elilinganisiweyo lendawo yokusebenza. Kufuneka kubekho iipropathi ezilungileyo zoomatshini (akukho kuxhuma rhoqo, ukuncokola, njl.njl.) ngexesha lokukhupha okuphakathi. Le mfuneko ibaluleke kakhulu.
I-valve yokhuseleko kufuneka ibe nesakhiwo esifanelekileyo kunye nentwasahlobo enokuqina okufanelekileyo ukugcina iimpawu ezintle zomatshini kunye nomthamo ozinzileyo wokukhupha. Ubungakanani bendlela yokuhamba yevalve yokhuseleko kufuneka ihlangabezane neemfuno ezifunekayo zepharamitha yokubala. Ukuba indawo enqamlezileyo yendlela yokuhamba incinci kakhulu, emva kokuba i-valve yokhuseleko ivuliwe, inxalenye yoxinzelelo oluphakathi ayikwazi ukukhutshwa ngexesha, kwaye uxinzelelo lwenkqubo luyaqhubeka nokunyuka, oluyingozi kakhulu. Ngokuchasene noko, ukuba indawo ye-cross-sectional ye-flow passage inkulu kakhulu, emva kokuba i-valve yokhuseleko ivuliwe, uxinzelelo luya kuhla ngokukhawuleza ngaphantsi koxinzelelo lokusebenza, kwaye i-disc ye-valve yokhuseleko iya kuvala kwaye ibangele impembelelo enobundlobongela kwisihlalo sevalve; nangona kunjalo, ngenxa yokuba inkqubo yokunyuka koxinzelelo lwenkqubo ayizange isuswe, i-disc iya kuphinda ivule ukwenza i-frequency jump, kwaye ngenxa yoko, isihlalo sevalve kunye nokutywinwa kwendawo yediski kuya konakala ngenxa yeempembelelo eziphindaphindiweyo. Xa iivalvu zokhuseleko zisetyenziselwa ulwelo olungacinezelekiyo, ukutsiba rhoqo kunokubangela ihamile yamanzi kwisixokelelwano.
Uxinzelelo lwe-inlet yevalve yokhuseleko xa lufikelela kubude obulinganisiweyo bokuvula kuthiwa luxinzelelo lokukhupha. Isetyenziswe kumajelo ahlukeneyo okanye amajelo afanayo phantsi kweemeko ezahlukeneyo zokusebenza, kwaye uxinzelelo lwayo lokukhutshwa luhlukile, oluchazwe ngokucacileyo kwimimiselo kunye nemigangatho efanelekileyo. Ngokuqhelekileyo ibonakaliswa njengepesenti yoxinzelelo olusetiweyo oludlula ixabiso. Uyilo lwesakhiwo sevalve yokhuseleko kufuneka luqinisekise ukuba uxinzelelo olulinganisiweyo lokukhutshwa lulawulwa ngokungqongqo ngaphakathi koluhlu oluchaziweyo.
3. Vala ngexesha
Xa ukukhutshwa kwevalve yokhuseleko kunciphisa uxinzelelo oluphakathi kwixabiso elithile, i-valve flap iwela ekudibaneni kwendawo yokutywina yesihlalo se-valve kwaye ifike kwindawo evaliweyo kwakhona. I-valve yokukhusela inokuhlala kwaye ivalwe ngexesha nangempumelelo, nto leyo isalathisi esibalulekileyo sokusebenza kakuhle.
Isenzo sevalve yokhuseleko ayifuni ukuba izixhobo okanye inkqubo yokuyeka ukusebenza okanye ukulungiswa. Ngamanye amaxesha, isenzo se-valve yokhuseleko sibangelwa yimiba yengozi efana ne-misoperation kwinkqubo. Kule meko, akunqweneleki ukuba uxinzelelo lokubuya lwe-valve yokhuseleko luphantsi kakhulu kunoxinzelelo olusebenzayo. Uxinzelelo lwembuyekezo oluphantsi kakhulu luthetha ukulahleka kwamandla okugqithisileyo kunye nokuphakathi, kwaye kuphazamisa ukusebenza okuqhelekileyo kwenkqubo yonke. Ngokuchasene noko, uxinzelelo lwesihlalo ngasemva aluphezulu kakhulu. Ukuba uxinzelelo lokubuyisela lusondele kuxinzelelo lokuvula, kulula ukubangela ukuba i-valve yokukhusela ivuleke kwakhona, ibangela ukuba i-valve yokhuseleko igxume rhoqo, kwaye ayinakulungele ukuseka kwakhona isitywina emva kokuvala. Ukongezelela, kwimeko yokuba i-valve yokukhusela ayikwazi ukuvalwa ngokuthembekileyo, ekubeni i-medium phakathi kweendawo zokutywina ayinqunyulwanga ngokupheleleyo, akunakwenzeka ukubuyisela ukusebenza kokutywinwa phantsi koxinzelelo oluqhelekileyo lokusebenza kwenkqubo.
Uyilo lwevalve yokhuseleko kufuneka luqinisekise ukuba lunokuvalwa ngokukhawuleza nangempumelelo. Ukubuya kwesihlalo esikhawulezileyo nesinamandla kuluncedo ngakumbi ekusekweni kokutywinwa kunokubuya kancinci kancinci nokucotha kwesitulo.
Ukusebenza kwesihlalo sokubuyisela i-valve yokhuseleko kulinganiswa ngokunyuka kwexabiso loxinzelelo lokuvula, ngokuqhelekileyo luchongwa ngokuvula kunye nokuvala ukuhlukana koxinzelelo. Iivalve zokhuseleko ezisetyenziselwa imidiya eyahlukeneyo zineenguqu ezahlukeneyo zokuvula kunye nokuvala uxinzelelo, ezichazwe ngokucacileyo kwimimiselo efanelekileyo kunye nemigangatho.
4. Ukutywinwa okuthembekileyo
Xa inkqubo ekhuselweyo iphantsi koxinzelelo oluqhelekileyo lokusebenza, i-valve evaliweyo yokhuseleko inomsebenzi wokutywinwa ofanelekileyo kunye nothembekileyo. Ngenxa yokuba ivalve yokhuseleko ivuza, indawo yokusebenza (ngamanye amaxesha ibiza kakhulu okanye iyingozi) iya kulahleka, ukusetyenziswa kwamandla kuya kwandiswa, kwaye indawo engqongileyo kunye ne-atmosfera iya kungcoliswa lisixhobo sokusebenza. Ukuvuza okugqithisileyo kuya kuchaphazela nokusebenza okuqhelekileyo kwesixhobo okanye inkqubo, kwaye nokunyanzela isixhobo ukuba siyeke ukusebenza. Ukuvuza okuqhubekayo kuya kutshabalalisa umphezulu wokutywina wevalve yokhuseleko, okukhokelela kukusilela ngokupheleleyo kwevalve yokhuseleko.
Ukumisela kwakhona isitywina emva kokuba i-valve yokhuseleko iqhutywe kunzima kunokugcina isimo sokutywinwa sokuqala. Ngenxa yokuba ivalve yokhuseleko ivaliwe, uxinzelelo oluphakathi lusebenza kwindawo enkulu yediski yevalve, kodwa ngaphambi kokuvula, isebenza kuphela kwindawo encinci ethintelwe ngumphezulu wokutywina. Ngoko ke, ukusebenza kokutywinwa kwevalve yokhuseleko kunokwenzeka ukuba kuncitshiswe emva kokusebenza, kwaye ngaloo ndlela kulahleke. Ngokukodwa, kunzima ngakumbi ukusombulula i-back-seat seal ye-valve yokhuseleko olusebenza ngokuthe ngqo. Kwii-valve zokhuseleko ezineendlela zokusebenza ezincedisayo, le ngxaki isonjululwa ngokutywinwa ngokunyanzeliswa.
Kunzima kakhulu ukufuna iivalvu zokhuseleko ukugcina ukuqina kuneevalvu eziqhelekileyo ezisetyenziselwa ukuvala. Ngenxa yokuba akukho mandla amakhulu asetyenziswayo phakathi kwamatywina, idiskhi yevalve yokhuseleko ibambelela kwisihlalo sevalve kuphela ukwenza uxinzelelo lwetywina ngoxinzelelo oluncinci oluthile. Ukunyanzeliswa kokutywinwa kunqunywe ngumahluko phakathi koxinzelelo lokumisela i-valve yokukhusela kunye noxinzelelo olusebenzayo lwezixhobo, ngokuqhelekileyo ixabiso elincinci (ngokuqhelekileyo i-10% yoxinzelelo lokumisela), ngoko ke ubukhulu kunye nobunzima bomgangatho wokutywinwa kwendawo yokukhusela i-valve yokukhusela iyadingeka kakhulu.
Iimfuno zokuqina kwevalve yokhuseleko ziyahluka ngokuxhomekeka kwimeko ephakathi okanye yokusebenza. Ngokuqhelekileyo, kunzima ukufezekisa i-valve yokhuseleko kunye nentsimbi-yentsimbi yokutywina indawo yokufumana ukuvuza. Ivalve yokhuseleko enesakhiwo sokutywina esithambileyo sesinyithi-esingeyontsimbi inomsebenzi ongcono kakhulu wokutywina.
Ixesha lokuposa: Sep-02-2021