I-valve yokusiza i-hydraulic ehlanganisiwe ye-LADRV-10

isici

Okubizwa ngokuthi i-valve encane yokulawula ukugeleza, njengoba igama layo lisho, i-valve yokulawula enamandla amancane okujikeleza.

Umthamo wokugeleza we-valve yinkomba yamandla e-valve ngaphansi kwezimo ezihlangene. I-China imelelwe inani elingu-C. Ichazwa ngokuthi: lapho i-valve ivuliwe ngokugcwele, lapho umehluko wengcindezi ngaphambi nangemva kwe-valve ingu-1kg/cm2 futhi isisindo esiphakathi singu-1g/cm3, isisindo esimaphakathi (m3/hr) sigeleza ku-valve njalo ngehora. Oketshezini olungenakucindezelwa, ngaphansi kwesimo sesiyaluyalu esigcwele (lapho inombolo kaReynolds inkulu ngokwanele, Re > 10 5 ngamanzi; Re > 5.5× 104 ukuze uthole umoya)

Kuphi:

△ umehluko we-p-pressure ngaphambi nangemva kwe-valve (kg/cm2) υ-ubunzima obumaphakathi (g/cm3)

Ukugeleza kwe-Q-Media (m3/h)

I-United States namanye amazwe asebenzisa inani lika-c ukukhombisa umthamo wokugeleza wevalvu. Amazinga aqashelwa umhlaba wonke i-I, E kanye no-C ikakhulukazi ahlobene nokusetshenziswa kukagesi ivelu engu-Av ukukhombisa amandla okugeleza kwamavalvu. Ubudlelwano bokuguqulwa phakathi kwabo bumi kanje:

Cv =1 ．17 C Cv =10 6 /24Av C=10 6 /28Av

Umthamo wokugeleza we-valve uncike kuphela esakhiweni se-valve ngokwayo. Lapho ubala umthamo odingekayo wokugeleza kwe-valve, kufanele kuqashelwe ukuthi isimo sokugeleza ku-valve sizohluka kakhulu lapho i-medium ihlukile noma izimo zokugeleza zihlukile.

Endabeni yezinga lokugeleza elincane, ikakhulukazi uketshezi lwe-viscous nokucindezela okuphansi, umkhawulo oyinhloko woketshezi ngokuvamile u-laminar noma isimo esixubile sokugeleza kwe-laminar kanye ne-turbulent. Ekugelezeni kwe-laminar, kunobudlelwano bomugqa phakathi kokugeleza okuphakathi nevalvu kanye nomehluko wengcindezi ngaphambi nangemuva kwevalvu. Esimeni esixubile sokugeleza kwe-laminar nokugeleza kwesiyaluyalu, ngokukhuphuka kwenombolo ye-Reynolds, noma ngabe umehluko wengcindezi uhlala njalo, i-dielectric mass egeleza nge-valve izokhula. Uma kunesiphithiphithi esiphelele, izinga lokugeleza alishintshi ngenombolo ye-Reynolds. Noma kunjalo, ukukhethwa kwe-valve encane elawula ukugeleza kusaqhutshwa ngezindlela zendabuko kanye namafomula wokubala. Nokho, inani elibaliwe lehla kakhulu kunani langempela. Ngokwedatha, uma i-CV ingaphansi kwe-Cv=0.01, isetshenziswa kuphela njengenkomba yamandla futhi inokubaluleka kwereferensi. Umthamo wangempela wokujikeleza kufanele unqunywe ngokusho