Ma'aunin kwararar bawul ɗin sarrafawa (Cv, Kv da C) na tsarin raka'a daban-daban bawuloli ne masu sarrafawa a ƙarƙashin matsin lamba mai tsauri, girman ruwa yana zagayawa a cikin naúrar lokaci lokacin da bawul ɗin sarrafawa ya buɗe gaba ɗaya, Cv, Kv da C akwai alaƙa tsakanin Cv = 1.156Kv, Cv = 1.167C. Wannan labarin ya raba ma'anar, naúrar, juyawa da cikakken tsarin samowa na Cv, Kv da C.
1, Ma'anar ma'aunin kwarara
Ƙarfin kwararar bawul ɗin sarrafawa wani takamaiman ruwa ne a takamaiman zafin jiki, lokacin da bawul ɗin ya ƙare don matsin lamba na bambancin naúrar, adadin yawan ruwa da ke gudana ta cikin bawul ɗin sarrafawa a cikin wani yanki na lokaci, ta amfani da tsarin raka'a daban-daban lokacin da akwai hanyoyi daban-daban na bayyanawa.
Ma'anar ma'aunin kwararar C
Idan aka yi la'akari da bugun jini, zafin ruwa na 5-40 ℃, bambancin matsin lamba tsakanin ƙarshen biyu na 1kgf/cm2, girman kwararar da ke tafe ta cikin bawul a kowace awa (wanda aka bayyana a cikin m3).C shine ma'aunin kwararar da ke cikin ma'aunin gama gari, ƙasarmu a baya an yi amfani da ita na dogon lokaci, wanda a da aka sani da ƙarfin zagayawa na C. Ma'aunin kwararar C shine ma'aunin kwararar da ke cikin ma'aunin gama gari.
② Ma'anar ma'aunin kwararar Kv
Idan aka yi la'akari da bugun jini, bambancin matsin lamba tsakanin ƙarshen bawul ɗin guda biyu shine 102kPa, zafin jiki na ruwa 5-40 ℃, girman ruwan da ke gudana ta cikin bawul ɗin sarrafawa a kowace awa (wanda aka bayyana a cikin m3). kv shine tsarin duniya na raka'a mai ma'aunin kwarara.
③ Ma'anar ma'aunin kwararar Cv
Girman ruwa a zafin jiki na 60°F wanda ke gudana ta cikin bawul mai sarrafawa a minti ɗaya (wanda aka bayyana a cikin galan Amurka gal) don bugun jini tare da matsin lamba daban-daban na 1lb/in2 a kowane ƙarshen bawul. Cv shine ma'aunin kwararar imperial.
2, Tsarin tsari na tsarin raka'a daban-daban
① Tsarin da raka'a na ƙarfin zagayawa C
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
Idan γ/γ0 = 1, Q=1m3/h, △P=1kgf/cm2, idan C an ayyana shi a matsayin 1, to N=1. Tsarin da kuma naúrar ƙarfin zagayawa C sune kamar haka:
A cikin dabarar C akwai ƙarfin zagayawar jini; naúrar Q ita ce m3/h; γ/γ0 ita ce takamaiman nauyi; △Naúrar P ita ce kgf/cm2.
② Tsarin lissafi da naúrar lissafin ma'aunin kwararar CV
Idan ρ/ρ0=1, Q=1USgal/min, ∆P=1lb/in2, kuma idan an ayyana Cv=1, to N=1. Tsarin da raka'o'in ma'aunin kwararar Cv sune kamar haka:
inda Cv shine ma'aunin kwarara; Q yana cikin USgal/min; ρ/ρ0 shine takamaiman yawan; kuma ∆P yana cikin lb/in2.
③ Tsarin lissafi da naúrar Kv mai yawan kwarara
Idan ρ/ρ0=1, Q=1m3/h, ΔP=100kPa, idan Kv=1, to N=0.1. Tsarin da kuma naúrar ma'aunin kwararar Kv sune kamar haka:
inda Kv shine ma'aunin kwarara; Q yana cikin m3/h; ρ/ρ0 shine takamaiman yawan; ΔP yana cikin kPa.
3, Canza ƙarfin zagayawa C, ƙimar kwararar Kv, ƙimar kwararar Cv
① kwararar ma'aunin CV da ƙarfin zagayawa C dangantaka
inda aka san cewa Q yana cikin USgal/min; ρ/ρ0 shine takamaiman yawan; kuma ∆P yana cikin lb/in2.
Idan C=1, Q=1m3/h, γ/γ0=1 (watau, ρ/ρ0=1), da ∆P=1kgf/cm2, maye gurbin dabarar Cv da yanayin C=1 shine:
Daga lissafin, mun san cewa C=1 da Cv=1.167 daidai suke (watau, Cv=1.167C).
② Canjin CV da Kv
Lokacin da Kv = 1, Q = 1m3 / h, ρ / ρ0 = 1, △ P = 100kPa wanda ke maye gurbin dabarar Cv don canza raka'a:
Wato, Kv = 1 yayi daidai da Cv = 1.156 (watau, Cv = 1.156Kv).
Saboda wasu bayanai da samfuran ƙarfin kwararar bawul mai sarrafawa C, ma'aunin kwararar Kv da tsarin kwararar Cv uku rashin tsarin samowa, amfani da sauƙin haifar da rudani. Changhui Instrumentation C, Kv, Cv daga ma'anar, aikace-aikacen raka'a da alaƙar da ke tsakanin ukun da za a fayyace, don taimakawa masu ƙira injiniya a cikin tsarin daidaita zaɓin bawul da lissafin maganganu daban-daban na ma'aunin kwararar (C, Kv, Cv) don canzawa da kwatantawa, don sauƙaƙe zaɓin bawul mai daidaitawa fiye da zaɓin.
Ƙimar CV na bawuloli na malam buɗe ido na Tianjin Zhongfa bawul sune kamar haka, idan ya cancanta, don Allah a duba.