Uyini umehluko kanye nemisebenzi ye-single eccentric, i-double eccentric kanye ne-triple eccentric butterfly valve

I-valve yevemvane eyi-eccentric eyodwa

Ukuze uxazulule inkinga ye-extrusion phakathi kwe-disc kanye nesihlalo se-valve ye-valve ye-butterfly egxilile, i-valve ye-butterfly eyodwa ye-eccentric ikhiqizwa. Hlakaza futhi unciphise ukukhishwa ngokweqile kweziphetho ezingenhla nezingezansi zepuleti levemvane kanye nesihlalo sevalvu. Kodwa-ke, ngenxa yesakhiwo esisodwa se-eccentric, i-scraping phenomenon phakathi kwe-disc nesihlalo se-valve ayinyamalala phakathi nayo yonke inqubo yokuvula nokuvala i-valve, futhi ububanzi besicelo bufana ne-valve ye-butterfly egxilile, ngakho-ke ayisetshenziswa kakhulu.

I-valve yevemvane ene-eccentric ephindwe kabili

Ngokwesisekelo se-valve ye-butterfly eyodwa eccentric, kunjalo i-valve ye-butterfly ephindwe kabili esetshenziswa kabanzi njengamanje. Isici saso sesakhiwo ukuthi isikhungo se-shaft se-valve stem sisuka enkabeni ye-disc kanye nendawo yomzimba. Umphumela we-eccentricity kabili wenza i-disc ihlukane nesihlalo se-valve ngokushesha ngemva kokuvulwa kwe-valve, okuqeda kakhulu ukukhishwa ngokweqile okungadingekile nokunwaya phakathi kwe-disc nesihlalo se-valve, kunciphisa ukumelana nokuvula, kunciphisa ukuguga, futhi kuthuthukise impilo yeSitulo. I-scraping iyancipha kakhulu, futhi ngesikhathi esifanayo,i-valve ye-butterfly ephindwe kabili ingasebenzisa futhi isihlalo se-valve yensimbi, ethuthukisa ukusetshenziswa kwe-valve ye-butterfly endaweni yokushisa ephezulu. Kodwa-ke, ngenxa yokuthi isimiso sayo sokubeka uphawu siyisakhiwo sokuvala se-positional, okungukuthi, indawo yokuvala i-disc kanye nesihlalo se-valve sixhumene nomugqa, futhi ukuguqulwa kwe-elastic okubangelwa i-disc extrusion yesihlalo se-valve kuveza umphumela wokuvala, ngakho-ke kunezidingo eziphakeme zokuvala (ikakhulukazi isihlalo se-Valve yensimbi), ingcindezi ephansi ethwala umthamo, yingakho ngokwesiko abantu be-valve becabanga ukuthi i-butterfant high ayinayo ingcindezi.

I-valve yevemvane eyi-eccentric kathathu

Ukumelana nokushisa okuphezulu, uphawu oluqinile kufanele lusetshenziswe, kodwa inani lokuvuza likhulu; ekuvuzeni kwe-zero, uphawu oluthambile kufanele lusetshenziswe, kodwa alumelani nokushisa okuphezulu. Ukuze unqobe ukungqubuzana kwe-valve butterfly eccentric ephindwe kabili, i-valve uvemvane ibe yi-eccentric okwesithathu. Isici saso sesakhiwo ukuthi ngenkathi i-valve eccentric stem eccentric i-eccentric, i-axis ye-conical ye-disc sealing surface ithambekele ku-axis ye-cylinder yomzimba, okusho ukuthi, ngemva kwe-eccentricity yesithathu, isigaba sokuvala se-disc asishintshi. Khona-ke iyindilinga yeqiniso, kodwa i-ellipse, futhi ukuma kwendawo yayo yokubeka uphawu nayo i-asymmetrical, uhlangothi olulodwa luthambekele emgqeni ophakathi komzimba, kanti olunye uhlangothi luhambisana nomugqa ophakathi womzimba. Isici salokhu okugqamile kwesithathu ukuthi isakhiwo sokuvala sishintshiwe ngokuyisisekelo, akusesona uphawu lwesikhundla, kodwa uphawu lwe-torsion, okungukuthi, alunciki ekuguquguqukeni kwesihlalo se-valve, kodwa sincike ngokuphelele ekucindezelweni kwendawo yokuxhumana yesihlalo se-valve ukufeza umphumela wokuvala ngokulingana nokucindezela okuphakathi, ukucindezela okuphezulu nokumelana nokushisa okuphezulu nakho kuxazululwa kalula.