Ama-coefficients okugeleza kwevalvu yokulawula (i-Cv, i-Kv no-C) yezinhlelo zamayunithi ahlukene ama-valve okulawula ngaphansi kokucindezela okuhlukile okuhleliwe, umthamo wamanzi ajikelezayo eyunithi yesikhathi lapho i-valve yokulawula ivuleke ngokugcwele, i-Cv, i-Kv ne-C kukhona. ubuhlobo phakathi kweCv = 1.156Kv, Cv = 1.167C.Lesi sihloko sabelana ngencazelo, iyunithi, ukuguqulwa kanye nenqubo yokutholwa okuphelele kwe-Cv, Kv kanye no-C.
1. Incazelo ye-flow coefficient
Umthamo wokugeleza kwevalvu yokulawula uketshezi oluthile ezingeni lokushisa elithile, lapho i-valve iphelela ukucindezela kokuhluka kweyunithi, inani levolumu yoketshezi eligeleza ku-valve yokulawula ngeyunithi yesikhathi, kusetshenziswa isistimu ehlukile yamayunithi lapho kunezindlela ezihlukene. yenkulumo.
Incazelo ye-flow coefficient C
Uma kubhekwa ukushaya, izinga lokushisa lamanzi angu-5-40 ℃, umehluko wengcindezi yevalvu phakathi kweziphetho ezimbili ze-1kgf/cm2, ivolumu yokugeleza ngevalvu ngehora (okuvezwa ku-m3).C yi-flow coefficient yemethrikhi evamile, izwe lethu esikhathini esidlule lisetshenziswe isikhathi eside, ngaphambili elaziwa ngokuthi amandla omjikelezo we-C. I-flow coefficient C yi-flow coefficient yemethrikhi evamile.
② Incazelo ye-flow coefficient Kv
Ngokunikezwa kwe-stroke, umehluko wengcindezi phakathi kweziphetho ezimbili ze-valve ngu-102kPa, izinga lokushisa lamanzi angu-5-40 ℃, umthamo wamanzi ogeleza nge-valve yokulawula ngehora (evezwe ku-m3).I-kv uhlelo lwamazwe ngamazwe lokugeleza kwe-coefficient yamayunithi.
③ Incazelo ye-flow coefficient Cv
Umthamo wamanzi ezingeni lokushisa elingu-60°F eligeleza kuvalvu elawulayo ngomzuzu (okuvezwa ngamalitha ase-US gal) nge-stroke enikeziwe enomfutho ohlukile ongu-1lb/in2 ekugcineni kwevalvu ngayinye.I-Cv iwumbuso ukugeleza kwe-coefficient.
2. Ukutholwa kwamafomula amasistimu amayunithi ahlukene
①Ifomula yomthamo wokujikeleza C namayunithi
当γ/γ0=1，Q=1m3/h，△P=1kgf/cm2时，如C定义为1，则N=1。则流通能力C的公式及单位如下:
Lapho γ/γ0=1, Q=1m3/h, △P=1kgf/cm2, uma u-C echazwa ngokuthi 1, bese kuba N=1.Ifomula kanye neyunithi yomthamo wokujikeleza C imi kanje:
Kufomula C amandla okujikeleza;Iyunithi ye-Q ingu-m3/h;γ/γ0 amandla adonsela phansi athize;△Iyunithi ye-P ingu-kgf/cm2.
② Ifomula yokubala i-Cv ye-coefficient kanye neyunithi
Lapho ρ/ρ0=1, Q=1USgal/min, ∆P=1lb/in2, futhi uma i-Cv=1 ichazwa, bese kuthi N=1.Ifomula namayunithi we-Cv ye-flow coefficient ami kanje:
lapho i-Cv iyi-coefficient yokugeleza;U-Q use-USgal/min;ρ/ρ0 ukuminyana okuthile;futhi ∆P iku-lb/in2.
③ Ifomula yokubala ye-Kv ye-coefficient kanye neyunithi
Lapho ρ/ρ0=1, Q=1m3/h, ΔP=100kPa, uma Kv=1, bese N=0.1.Ifomula neyunithi ye-flow coefficient Kv imi kanje:
lapho i-Kv iyi-coefficient yokugeleza;Q iku-m3/h;ρ/ρ0 ukuminyana okuthile;I-ΔP iku-kPa.
3, Ukuguqulwa komthamo womjikelezo C, i-flow coefficient Kv, i-flow coefficient Cv
① ukugeleza kwe-Cv nobudlelwane bomthamo wokujikeleza C
lapho kwaziwa khona ukuthi i-Q ise-USgal/min;ρ/ρ0 ukuminyana okuthile;futhi ∆P iku-lb/in2.
Lapho u-C=1, Q=1m3/h, γ/γ0=1 (okungukuthi, ρ/ρ0=1), kanye no-∆P=1kgf/cm2, esikhundleni sefomula ye-Cv nesimo sika-C=1 kungukuthi:
Kusukela ezibalweni, siyazi ukuthi i-C=1 ne-Cv=1.167 ziyalingana (okungukuthi, Cv=1.167C).
② Ukuguqulwa kwe-Cv ne-Kv
Lapho i-Kv = 1, Q = 1m3 / h, ρ / ρ0 = 1, △ P = 100kPa ishintsha indlela ye-Cv yokuguqulwa kweyunithi:
Okungukuthi, i-Kv = 1 ilingana ne-Cv = 1.156 (okungukuthi, i-Cv = 1.156Kv).
Ngenxa yolunye ulwazi namasampula omthamo we-valve yokulawula ukugeleza kwe-C, i-flow coefficient Kv nohlelo lokugeleza Cv ezintathu ukuntuleka kwenqubo yokutholwa, ukusetshenziswa kokulula ukukhiqiza ukudideka.I-Changhui Instrumentation C, Kv, Cv kusukela encazelweni, ukusetshenziswa kweyunithi kanye nobudlelwano phakathi kokuthathu okuzocaciswa, ukusiza abaklami bonjiniyela ohlelweni lokulawula ukukhethwa kwamavalvu nokubalwa kwezinkulumo ezihlukene zokugeleza kwama-coefficients (C, Kv, Cv) ukuguqulwa nokuqhathanisa, ukwenza lula ukukhethwa kwama-valve alawulayo kunokukhethwa.
Amanani e-CV amavalvu ovemvane e-Tianjin Zhongfa Valve ami kanje, uma kunesidingo, sicela ubheke.