ʻO nā coefficients kahe kahe o ka valve control (Cv, Kv a me C) o nā ʻōnaehana ʻokoʻa he mau kīwaha mana ma lalo o ke kaomi ʻokoʻa paʻa, ʻo ka nui o ka wai e kahe ana i loko o kahi manawa i ka wā e wehe piha ai ka pahu mana, Cv, Kv a me C aia. he pilina ma waena o Cv = 1.156Kv, Cv = 1.167C.Hōʻike kēia ʻatikala i ka wehewehe ʻana, ʻāpana, hoʻololi a me ke kaʻina hana derivation o Cv, Kv a me C.
1、Ka wehewehe ʻana o ka helu kahe
ʻO ka mana kahe o ka valve control he wai kikoʻī i kahi mahana kikoʻī, i ka wā e pau ai ka pahu no ka puʻe ʻokoʻa o ka ʻāpana, ʻo ka helu o ka nui o ka wai e kahe ana ma o ka valve mana i kahi manawa, me ka hoʻohana ʻana i kahi ʻōnaehana ʻokoʻa o nā ʻāpana ke loaʻa nā ʻano like ʻole. o ka hoike ana.
Wehewehe o ke kahe kahe C
Hāʻawi ʻia i ka hahau, ka mahana o ka wai 5-40 ℃, ka ʻokoʻa o ke kaomi valve ma waena o nā wēlau ʻelua o 1kgf / cm2, ka nui o ke kahe ʻana ma ka valve i kēlā me kēia hola (i hōʻike ʻia i ka m3). ʻO ko mākou ʻāina i ka wā ma mua ua hoʻohana ʻia no ka manawa lōʻihi, i ʻike mua ʻia ʻo ka hiki ke kahe o ka C. ʻO ka coefficient kahe C ka coefficient kahe o ka metric maʻamau.
② Wehewehe o ka huina kahe Kv
Hāʻawi ʻia i ka hahau, ʻo ka ʻokoʻa ʻokoʻa ma waena o nā ʻaoʻao ʻelua o ka valve he 102kPa, ka mahana o 5-40 ℃ wai, ka nui o ka wai e kahe ana ma o ka valve control i kēlā me kēia hola (i hōʻike ʻia ma m3).ʻO kv ka ʻōnaehana holoʻokoʻa o nā ʻāpana kahe.
③ Wehewehe o ka huina kahe Cv
ʻO ka nui o ka wai ma kahi mahana o 60 ° F e kahe ana ma o ka valve hoʻoponopono i kēlā me kēia minuke (i hōʻike ʻia ma US galani US gal) no ka hahau i hāʻawi ʻia me ke kaomi ʻokoʻa o 1lb/in2 ma kēlā me kēia hopena o ka valve. ʻO Cv ka imperial. kaha kahe.
2、Derivation of formula no nā ʻōnaehana wae like ʻole
①Circulation capacity C formula and units
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：
Inā γ/γ0=1, Q=1m3/h, △P=1kgf/cm2, inā wehewehe ʻia ʻo C he 1, a laila N=1.ʻO ke kumu a me ka ʻāpana o ka hiki ke kahe C penei:
Ma ka helu C ka hiki ke holo;ʻO ka ʻāpana Q he m3/h;ʻO γ/γ0 ka umekaumaha kikoʻī;△P he kgf/cm2.
② ʻO ke kumu helu helu Cv coefficient a me ka wae
Ke ρ/ρ0=1, Q=1USgal/min, ∆P=1lb/in2, a inā wehewehe ʻia ʻo Cv=1, a laila N=1.ʻO ke kumu a me nā ʻāpana o ka coefficient kahe Cv penei:
kahi o Cv ka huina kahe;Aia ʻo Q ma USgal/min;ʻO ρ/ρ0 ka mānoanoa kikoʻī;a ʻo ∆P i loko o lb/in2.
③ Ka helu helu Kv me ka wae
Ina ρ/ρ0=1, Q=1m3/h, ΔP=100kPa, ina Kv=1, alaila N=0.1.ʻO ke kumu a me ka ʻāpana o ka huina kahe Kv penei:
ma kahi o Kv ka huina kahe;Aia ka Q i ka m3/h;ʻO ρ/ρ0 ka mānoanoa kikoʻī;Aia ka ΔP i kPa.
3、Ka hoʻololi ʻana o ka hiki ke kahe C, kahe kahe Kv, kahe kahe Cv
① kahe kahe Cv a me ke kaapuni hiki C pilina
kahi i ʻike ʻia aia ʻo Q ma USgal/min;ʻO ρ/ρ0 ka mānoanoa kikoʻī;a ʻo ∆P i loko o lb/in2.
Inā ʻo C=1, Q=1m3/h, γ/γ0=1 (ʻo ia hoʻi, ρ/ρ0=1), a me ∆P=1kgf/cm2, e hoʻololi i ke ʻano Cv me ke kūlana o C=1:
Mai ka helu ʻana, ʻike mākou ua like ka C=1 a me Cv=1.167 (ʻo ia hoʻi, Cv=1.167C).
② Huli Cv a me Kv
Ke hoʻololi ʻo Kv = 1, Q = 1m3 / h, ρ / ρ0 = 1, △ P = 100kPa i ka hoʻololi Cv no ka hoʻololi ʻana o ka ʻāpana:
ʻO ia hoʻi, Kv = 1 ua like ia me Cv = 1.156 (ʻo ia hoʻi, Cv = 1.156Kv).
Ma muli o kekahi mau 'ike a me nā la'ana o ka mana valve kahe ka mana C, kahe coefficient Kv a me ka kahe nenoaiu Cv ekolu nele o ka derivation kaʻina hana, ka hoʻohana 'ana o ka oluolu e hana huikau.Changhui Instrumentation C, Kv, Cv mai ka wehewehena, noi hui a me ka pilina ma waena o nā mea ekolu e e ho'ākāka 'ia, e kōkua 'enekinia mea hoʻolālā i ke kaʻina hana o ka hooponopono ana koho valve a me ka helu ana o na olelo like ole o kahe ana coefficients (C, Kv, Cv) no. ka hoʻololi a me ka hoʻohālikelike, e hoʻomaʻamaʻa i ke koho ʻana i nā valve hoʻoponopono ma mua o ke koho.
ʻO nā kumukūʻai CV o nā valve butterfly o Tianjin Zhongfa Valve penei, inā pono, e ʻoluʻolu e nānā.