Ama-valve e-globebezilokhu ziyinsika yokulawula uketshezi iminyaka engu-200 futhi manje zitholakala yonke indawo.Kodwa-ke, kwezinye izinhlelo zokusebenza, amadizayini amavalvu embulunga nawo angasetshenziswa ukuphatha ukuvala ukuvala ngokuphelele koketshezi.Ama-valve e-globe ngokuvamile asetshenziselwa ukulawula ukugeleza koketshezi.Ivalvu yeglobhu ivuliwe/ivaliwe kanye nokusetshenziswa kwe-modulating kungabonakala ngaphandle kwezindlu nezakhiwo zebhizinisi, lapho kubekwa khona amavalvu njalo.

Umusi namanzi kwakubalulekile kuNguquko Yezimboni, kodwa lezi zinto ezingase zibe yingozi kwakudingeka zivinjelwe.Ii-valve yomhlabaiyi-valve yokuqala edingekayo ukuze kuqedwe lo msebenzi ngempumelelo.Idizayini yevalvu yomhlaba yaba yimpumelelo futhi yathandwa kakhulu kangangokuthi yaholela ekutheni iningi labakhiqizi abakhulu bendabuko be-valve (i-Crane, i-Powell, i-Lunkenheimer, i-Chapman, ne-Jenkins) bathole amalungelo abo obunikazi okuqala.

Ama-valve esangoahloselwe ukuthi asetshenziswe ezindaweni ezivuleke ngokugcwele noma ezivalwe ngokugcwele, kuyilapho amavalvu eglobhu angasetshenziswa njengama-block noma amavalvu ahlukanisayo kodwa aklanyelwe ukuthi avuleke ngokwengxenye ukuze alawule ukugeleza lapho elawula.Ukunakekela kufanele kusetshenziswe ezinqumweni zokuklama lapho kusetshenziswa ama-valve embulunga kuma-valve asebenza eyedwa navaliwe, njengoba kuyinselele ukugcina uphawu oluqinile ngokucindezela okukhulu kudiski.Amandla oketshezi azosiza ekufinyeleleni uphawu oluhle futhi enze kube lula ukuvala lapho uketshezi lugeleza lusuka phezulu luye phansi.

Amavalvu eglobhu akulungele ukusetshenziswa kwamavalvu okulawula ngenxa yomsebenzi wawo wokulawula, ovumela ukulawulwa okuhle kakhulu ngezindawo ezibeka indawo kanye nama-actuator axhunywe kubhonethi yamavalvu embulunga kanye nesiqu.Zihamba phambili ezinhlelweni eziningi zokulawula uketshezi futhi kubhekiselwa kuzo kulezi zinhlelo zokusebenza njengokuthi “Izinto Zokugcina Zokulawula.”

indlela yokugeleza engaqondile

I-Globe yaziwa nangokuthi i-valve yembulunga ngenxa yesimo sayo sokuqala esiyindilinga, esafihla imvelo engavamile nephithizelayo yendlela yokugeleza.Njengoba iziteshi zayo ezingenhla nezingezansi zibolile, i-valve yembulunga evuleke ngokugcwele isabonisa ukungqubuzana okuphawulekayo noma umgoqo wokugeleza koketshezi ngokungafani nesango elivuleke ngokugcwele noma i-valve yebhola.Ukungqubuzana koketshezi okubangelwa ukugeleza okutshekile kunciphisa ukudlula kuvalvu.

I-flow coefficient, noma “Cv,” yevalvu isetshenziselwa ukubala ukugeleza kuyo.Amavalvu esango anokumelana nokugeleza okuncane kakhulu uma esendaweni evulekile, yingakho i-Cv izohluka kakhulu kuvalvu yesango kanye nevalvu yeglobhu enosayizi ofanayo.

I-disc noma ipulaki, esebenza njengendlela yokuvala i-valve yembulunga, ingenziwa ibe yizinhlobonhlobo zomumo.Izinga lokugeleza ngevalvu lingashintsha ngokuphawulekayo ngokusekelwe enanini lesiqu lama-spins lapho i-valve ivuliwe ngokushintsha ukuma kwediski.Idizayini yediski egobile evamile kakhulu noma “yendabuko” isetshenziswa kuningi lezinhlelo zokusebenza ngoba ifaneleka kangcono kuneminye imiklamo yokunyakaza okuthile (ukuzungezisa) kwesiqu se-valve.Amadiski e-V-port afanele bonke osayizi bamavalvu embulunga futhi adizayinelwe ukuvinjelwa kokugeleza okuhle kumaphesenti ahlukene okuvula.Ukulawulwa kokugeleza okuphelele kuwumgomo wezinhlobo zezinaliti, kodwa ngokuvamile zinikezwa ngamadayimitha amancane kuphela.Okufakiwe okuthambile, okuqinile kungafakwa kudiski noma esihlalweni uma ukuvala shaqa kuyadingeka.

I-globe valve trim

Ukuvalwa kwengxenye yangempela kuya kwengxenye ku-valve yembulunga kunikezwa i-spool.Isihlalo, idiski, isiqu, isihlalo sangemuva, futhi ngezinye izikhathi i-hardware enamathisela isiqu kudiski yenza ukunquma kwevalvu yembulunga.Ukusebenza kahle kwanoma iyiphi i-valve neminyaka yokuphila kuncike ekwakhiweni kwe-trim nasekukhetheni kwezinto ezibonakalayo, kodwa ama-valve eglobhu asengozini kakhulu ngenxa yokungqubuzana kwawo okuphezulu koketshezi kanye nezindlela zokugeleza eziyinkimbinkimbi.Isivinini kanye nesiyaluyalu kukhuphuka njengoba isihlalo nediski zisondelana.Ngenxa yesimo sokugqwala soketshezi kanye nesivinini esikhulayo, kungenzeka ukulimaza i-valve trim, okuzokwandisa kakhulu ukuvuza kwe-valve lapho ivaliwe.Intambo yigama lephutha elivela ngezikhathi ezithile njengama-flakes amancane esihlalweni noma kwi-disc.Okuqale njengendlela encane yokuvuza kungase kukhule futhi kuphenduke ukuvuza okubalulekile uma kungalungiswa ngesikhathi.

Ipulaki yevalvu kumavalvu eglobhu yethusi amancane ivamise ukwenziwa ngento efanayo nomzimba, noma ngezikhathi ezithile ingxube eqinile efana nethusi.Impahla ye-spool ejwayelekile kakhulu yamavalvu eglobhu yensimbi eyithusi.I-IBBM, noma “I-Iron Body, Bronze Mounting,” igama lalesi sici sensimbi.Kunezinto eziningi zokunquma ezitholakalayo zamavalvu ensimbi, kodwa ngokuvamile i-elementi yokunquma eyodwa noma ngaphezulu yenziwa ngensimbi engagqwali engu-400 ye-martensitic.Ukwengeza, izinto eziqinile ezifana ne-stellite, uchungechunge lwama-stainless steels angu-300, nama-alloys e-copper-nickel njenge-Monel asetshenziswa.

Kunezindlela ezintathu eziyisisekelo zama-valve embulunga.Umumo othi "T", onesiqu esibheke ekugelezeni kwepayipi, yiwona ojwayelekile kakhulu.
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Ngokufanayo ne-T-valve, i-valve ye-engeli izungezisa ukugeleza ngaphakathi kwevalve ngamadigri angu-90, isebenza njengedivayisi yokulawula ukugeleza kanye nendololwane yepayipi engu-90 degree.“Ezihlahleni zikaKhisimusi” zikawoyela negesi, ama-engeli eglobhu ama-valve awuhlobo lwamavalvu alawula ukuphuma kokugcina asasetshenziswa kakhulu phezu kwamabhayela.
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Idizayini ethi “Y”, okuwumklamo wesithathu, ihloselwe ukuqinisa idizayini yokuvula/ukuvala izinhlelo zokusebenza kuyilapho kuncishiswa ukugeleza okunesiyaluyalu okwenzeka emzimbeni wamavalvu embulunga.Ibhonethi, isiqu, kanye nediski yalolu hlobo lwevalvu yembulunga i-engeli engu-30-45 degrees ukwenza umzila ogelezayo uqonde kakhudlwana futhi unciphise ukungqubuzana koketshezi.Ngenxa yokuncipha kokungqubuzana, ivalvu mancane amathuba okuthi igcine umonakalo ogugulekayo futhi izici zokugeleza zesistimu yamapayipi ziyathuthukiswa.