Ukukhetha imodi ye-valve drive, ukufunda isisombululo sokuvuza kwe-valve

Ukukhetha imodi ye-valve drive, ukufunda isisombululo sokuvuza kwe-valve

Ukukhetha imodi ye-valve drive kusekelwe kulokhu:
1) uhlobo lwe-valve, ukucaciswa nokwakheka.
2) umzuzu wokuvula nowokuvala wevalvu (ingcindezi yepayipi, umehluko omkhulu wengcindezi wevalvu), i-thrust.
3) Qhathanisa izinga lokushisa eliphezulu le-ambient nezinga lokushisa loketshezi.
4) Imodi kanye nemvamisa yokusetshenziswa.
5) Ukuvula nokuvala isivinini nesikhathi.
6) Ububanzi besiqu, umzuzu wesikulufa, isiqondiso sokujikeleza.
7) Imodi yokuxhuma.
8) Imingcele yomthombo wamandla: amandla kagesi kagesi, inombolo yesigaba, imvamisa; Ingcindezi yomthombo womoya womoya; I-Hydraulic medium pressure.
9) Ukucatshangelwa okukhethekile: izinga lokushisa eliphansi, ukulwa nokugqwala, ukuvimbela ukuqhuma, ukuvimbela amanzi, ukuvimbela umlilo, ukuvikelwa kwemisebe, njll.
Kuwo wonke amadivaysi e-valve actuation, imishini kagesi neyefilimu yomoya yizona ezisetshenziswa kakhulu. Amadivayisi kagesi asetshenziswa ikakhulukazi kuma-valve wesifunda avaliwe; Idivayisi ye-pneumatic yefilimu encane isetshenziswa ikakhulukazi ku-valve yokulawula. Idrayivu ye-electromagnetic isetshenziselwa ikakhulukazi ama-valve amancane ububanzi. I-bellows drive eshumekiwe isetshenziswa kakhulu kumavalvu e-disc stroke kanye nemidiya ebolayo neyingozi. Kodwa ububanzi bayo bokusetshenziswa ngokuvamile bulinganiselwe idivayisi yokushayela eyisiza elawula ukudluliselwa okuyinhloko.
Isidingo esikhethekile sokusebenza kwe-valve yikhono lokukhawulela i-torque noma amandla e-axial. Idivayisi kagesi ye-valve isebenzisa ama-couplings okunciphisa i-torque. Kumishini yokushayela ye-hydraulic kanye ne-pneumatic, amandla ahlobene ancike endaweni esebenzayo ye-diaphragm noma i-piston kanye nokucindezela kwendawo yokushayela. Isiphethu singasetshenziswa futhi ukukhawulela amandla asetshenzisiwe.
Izixazululo zokuvuza kwe-valve
Ukuvuza kwe-valve sekungomunye wemithombo eyinhloko yokuvuza kudivayisi, ngakho-ke kubaluleke kakhulu ukuthuthukisa ikhono lokuvimbela ukuvuza kwe-valve, ukuvimbela ukuvuza kwe-valve, kumele kube nolwazi oluyisisekelo lwezingxenye zokuvala ama-valve ukuvimbela ukuvuza kwemidiya —— valve. ukubeka uphawu, lokhu kuyinto ehamba phambili.
Ukubeka uphawu ukuvimbela ukuvuza, ngakho-ke umgomo wokuvala ama-valve nawo usuka ekuvimbeleni ucwaningo lokuvuza. Kunezici ezimbili eziyinhloko ezibangela ukuvuza, enye iyisici esibaluleke kakhulu esithinta ukusebenza kokuvala, okungukuthi, kukhona igebe phakathi kwepheya elivalayo, enye iwukuthi kukhona umehluko wengcindezi phakathi kwezinhlangothi ezimbili zokuvala uphawu.
Umgomo wokuvala ama-valve nawo usuka ekuvaleni uketshezi, ukuvalwa kwegesi, umgomo wokuvuza kokuvalwa kwama-valve kanye nezinye izici ezine okufanele zihlaziywe.
1. Ukuqina koketshezi
Ukuqina koketshezi kunqunywa yi-viscosity yalo kanye nokuqina kwendawo. Lapho i-valve evuzayo ye-capillary igcwele igesi, ukungezwani kwendawo kungase kuxoshe noma kudonsele uketshezi ku-capillary. Futhi lokho kwakha i-Angle e-tangent. Lapho i-Angle ye-tangent ingaphansi kuka-90 °, uketshezi lujovwa ku-capillary tube, futhi ukuvuza kwenzeka.
Isizathu sokuvuza sisezicini ezihlukahlukene ze-medium. Ukuhlola ngemidiya ehlukene, ngaphansi kwesimo esifanayo, kuzothola imiphumela ehlukene. Ungasebenzisa amanzi, umoya, uphalafini, njll. Uma i-tangent Angle inkulu kuno-90°, ukuvuza nakho kuzokwenzeka.
Ngenxa yobuhlobo namafutha noma ifilimu ye-wax ebusweni bensimbi. Uma lawa mafilimu angaphezulu esencibilikisiwe, izici zobuso bensimbi ziyashintsha, futhi uketshezi, olwaluxoshiwe ngaphambili, luzomanzisa indawo futhi luvuze. Ngenxa yalesi simo esingenhla, ngokusho kwefomula kaPoisson, inhloso yokuvimbela ukuvuza noma ukunciphisa ukuvuza ingabonakala ngaphansi kwesimo sokunciphisa ububanzi be-capillary kanye ne-viscosity ephakathi.
2. Ukuqina kwegesi
Ngokusho kwefomula kaPoisson, ukuqina kwegesi kuhlobene nama-molecule egesi kanye ne-viscosity yegesi. Ukuvuza kuhambisana ngokuphambene nobude be-capillary kanye ne-viscosity yegesi, futhi ngokulingana nobubanzi be-capillary namandla okushayela. Lapho ububanzi be-capillary kanye namazinga ajwayelekile enkululeko yama-molecule egesi afana, ama-molecule egesi azogeleza ku-capillary ngokunyakaza kwamahhala okushisayo.
Ngakho-ke, lapho senza ukuhlolwa kokuvalwa kwe-valve, okuphakathi kufanele kube ngamanzi ukudlala indima yokuvala, ngomoya noma igesi ayikwazi ukudlala indima yokuvala.
Ngisho noma sinciphisa ububanzi be-capillary ngaphansi kwe-molecule yegesi ngokuguqulwa kwepulasitiki, ukugeleza kwegesi akukwazi ukumiswa. Isizathu siwukuthi igesi isengasakaza ezindongeni zensimbi. Ngakho-ke lapho senza ukuhlolwa kwegesi, kufanele siqine kakhulu kunokuhlola uketshezi.
3. Isimiso sokuvala isiteshi sokuvuza
Isivalo se-valve sakhiwe izingxenye ezimbili, ubuhhadlahhadla, obakhiwe ubulukhuni bokungalingani okusabalele endaweni ye-waveform kanye nokubanda kwebanga phakathi kweziqongo. Ngaphansi kwesimo sokuthi amandla okunwebeka ezinto eziningi zensimbi aphansi ezweni lethu, sidinga ukuphakamisa izidingo eziphakeme zamandla okucindezela izinto zensimbi, okungukuthi, amandla okucindezela wezinto ezibonakalayo kufanele adlule ukunwebeka kwawo, uma sifuna ukufeza isimo sokufaka uphawu. Ngakho-ke, ekwakhiweni kwe-valve, umbhangqwana wokuvala uphawu uhlanganiswe nomehluko othile wokuqina ukuze ufanise.
4. Ipheya yokuvala i-valve
I-valve seal pair ingxenye yesihlalo se-valve kanye nokuvala okuvala lapho zixhumene. Indawo yokubeka uphawu yensimbi ijwayele ukulimala kusuka ku-clamping media, ukugqwala kwemidiya, izinhlayiya zokugqoka, i-cavitation kanye nokuguguleka ngesikhathi sokusetshenziswa.
Isibonelo, gqoka izinhlayiya, uma izinhlayiya ezigugile kunobulukhuni bobuso buncane, lapho indawo yokuvala ifakwa, ukunemba kwendawo kuzothuthukiswa, futhi ngeke kube kubi. Ngokuphambene nalokho, kuzokwenza ukunemba kwendawo kube kubi nakakhulu. Ngakho-ke, ekukhethweni kwezinhlayiya zokugqoka, izinto ezibonakalayo, isimo sokusebenza, i-lubricity kanye nokugqwala kwendawo yokubeka uphawu kufanele kucatshangelwe ngokugcwele. Njengezinhlayiya zokugqoka, lapho sikhetha izimpawu, kufanele sicabangele ngokucophelela izici ezihlukahlukene ezithinta ukusebenza kwazo ukuze sidlale umsebenzi wokuvimbela ukuvuza. Ngakho-ke, izinto ezimelana nokugqwala, ukuhuzuka nokuguguleka kufanele kukhethwe. Uma kungenjalo, ukuntuleka kwanoma iyiphi enye yezidingo kuzokwenza ukusebenza kwayo kokubeka uphawu ** kwehliswe.
Kunezici eziningi ezithinta uphawu lwe-valve, ikakhulukazi okulandelayo:
1. Isakhiwo sesesekeli sokuvala uphawu
Ngaphansi kokushintsha kwezinga lokushisa noma amandla okuvala, ukwakheka kwepheya yokuvala kuzoshintsha. Futhi lolu shintsho luzothinta futhi luguqule umbhangqwana wokuvala phakathi kwamandla, ukuze ukusebenza kwe-valve seal kuncishiswe.
Ngakho-ke, lapho sikhetha izimpawu, kufanele sikhethe izimpawu ezine-deformation elastic. Ngesikhathi esifanayo, qaphela ububanzi bendawo yokubeka uphawu. Isizathu siwukuthi indawo yokuxhumana ye-sealing pair ayihambisani ngokuphelele. Lapho ububanzi bendawo yokuvala inyuka, kuyadingeka ukwandisa amandla adingekayo ukuze kufakwe uphawu.
2. Ukucindezela okuqondile kwendawo yokuvala uphawu
Ukucindezela okuqondile kwendawo yokuvala kuthinta ukusebenza kokuvala kanye nempilo yesevisi ye-valve.
Ngakho-ke, ukucindezela kwendawo yokubeka uphawu nakho kuyisici esibaluleke kakhulu. Ngaphansi kwezimo ezifanayo, ukucindezela okukhulu kakhulu kuzodala ukulimala kwe-valve, kodwa ukucindezela okuncane kakhulu kuzodala ukuvuza kwe-valve. Ngakho-ke, kudingeka sicabangele ngokugcwele ingcindezi ethile ekwakhiweni kokufanelekile.
3. Izinto ezibonakalayo ze-medium
Izakhiwo ezibonakalayo ze-medium nazo zithinta ukusebenza kophawu lwe-valve. Lezi zakhiwo zomzimba zihlanganisa izinga lokushisa, i-viscosity, kanye ne-surface hydrophilicity.
Ukushintsha kwezinga lokushisa akuthinti nje kuphela ukukhululeka kwebhangqa lokuvala kanye nobukhulu bezingxenye, kodwa futhi kunobudlelwane obungenakuhlukaniswa ne-viscosity yegesi. I-viscosity yegesi iyanda noma yehla ngokunyuka noma ukwehla kwezinga lokushisa.
Ngakho-ke, ukuze sinciphise umthelela wokushisa ekusebenzeni kokuvala kwe-valve, kufanele siklame ipheya yokuvala ibe isihlalo esivumelana nezimo namanye ama-valve anesinxephezelo sokushisa.
4. Ikhwalithi yokuvala uphawu
Ikhwalithi ye-Seal ngokuyinhloko ibhekisela ekukhethweni kwezinto zokwakha, ukufanisa, ukunemba kokukhiqiza esheke. Isibonelo, i-disc ihambisana kahle nobuso bokuvala isihlalo ukuze kuthuthukiswe ukuqina. Isici sokukhohlakala okwengeziwe kwendandatho ukuthi ukusebenza kwayo kokuvala i-labyrinth kuhle.