Li-coefficient tsa phallo ea valve ea taolo (Cv, Kv le C) tsa litsamaiso tse fapaneng tsa yuniti ke li-valve tsa taolo tlas'a khatello e sa fetoheng ea phapang, bophahamo ba metsi bo potolohang ka yuniti ea nako ha valve ea taolo e bulehile ka botlalo, Cv, Kv le C ho na le kamano pakeng tsa Cv = 1.156Kv, Cv = 1.167C. Sengoloa sena se arolelana tlhaloso, yuniti, phetoho le ts'ebetso e felletseng ea ho fumana Cv, Kv le C.
1, Tlhaloso ea phallo ea coefficient
Bokgoni ba phallo ya valve ya taolo ke mokelikeli o itseng mochesong o itseng, ha valve e fela bakeng sa kgatello e fapaneng ya yuniti, palo ya bophahamo ba mokelikeli o phallang ka har'a valve ya taolo ka yuniti ya nako, ho sebediswa sistimi e fapaneng ya diyuniti ha ho na le mekgwa e fapaneng ya tlhahiso.
Tlhaloso ea coefficient ea phallo C
Ka lebaka la ho otloa, mocheso oa metsi a 5-40 ℃, phapang ea khatello ea valve pakeng tsa lipheletso tse peli tsa 1kgf/cm2, bophahamo ba phallo ka har'a valve ka hora (e hlalositsoeng ka m3). C ke coefficient ea phallo ea metric e tloaelehileng, naha ea rona nakong e fetileng e 'nile ea sebelisoa ka nako e telele, eo pele e neng e tsejoa e le bokhoni ba potoloho ea C. Coefficient ea phallo C ke coefficient ea phallo ea metric e tloaelehileng.
② Tlhaloso ea coefficient ea phallo Kv
Ka lebaka la ho otloa, phapang ea khatello lipakeng tsa lipheletso tse peli tsa valve ke 102kPa, mocheso oa metsi a 5-40 ℃, bophahamo ba metsi a phallang ka har'a valve ea taolo ka hora (e hlalositsoe ka m3). kv ke sistimi ea machaba ea coefficient ea phallo ea liyuniti.
③ Tlhaloso ea coefficient ea phallo Cv
Bophahamo ba metsi mochesong oa 60°F bo phallang ka har'a valve e laolang ka motsotso (e hlalosoang ka ligalone tsa US tsa US gal) bakeng sa stroke e fanoeng e nang le khatello e fapaneng ea 1lb/in2 pheletsong ka 'ngoe ea valve. Cv ke coefficient ea phallo ea borena.
2, Ho nkuwa ha diforomo bakeng sa ditsamaiso tse fapaneng tsa yuniti
①Bokgoni ba potoloho C formula le diyuniti
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:
Ha γ/γ0=1, Q=1m3/h, △P=1kgf/cm2, haeba C e hlalosoa e le 1, joale N=1. Foromo le yuniti ea bokhoni ba potoloho ea mali C ke tse latelang:
Foromong C ke bokgoni ba ho potoloha ha metsi; yuniti ya Q ke m3/h; γ/γ0 ke matla a khoheli a itseng; △yuniti ya P ke kgf/cm2.
② Foromo ea palo ea Cv le yuniti ea phallo
Ha ρ/ρ0=1, Q=1USgal/min, ∆P=1lb/in2, mme haeba Cv=1 e hlalositsoe, joale N=1. Foromo le diyuniti tsa coefficient ya phallo Cv ke tse latelang:
moo Cv e leng coefficient ea phallo; Q e ho USgal/min; ρ/ρ0 ke bongata bo itseng; 'me ∆P e ho lb/in2.
③ Foromo ea palo ea Kv le yuniti
Ha ρ/ρ0=1, Q=1m3/h, ΔP=100kPa, haeba Kv=1, joale N=0.1. Foromo le yuniti ea coefficient ea phallo Kv ke tse latelang:
moo Kv e leng coefficient ea phallo; Q e ho m3/h; ρ/ρ0 ke bongata bo itseng; ΔP e ho kPa.
3, Phetoho ea bokhoni ba potoloho C, coefficient ea phallo Kv, coefficient ea phallo Cv
Kamano ea ① ea phallo ea mali Cv le bokhoni ba potoloho ea mali C
moo ho tsejoang hore Q e ho USgal/min; ρ/ρ0 ke bongata bo itseng; mme ∆P e ho lb/in2.
Ha C=1, Q=1m3/h, γ/γ0=1 (ke hore, ρ/ρ0=1), le ∆P=1kgf/cm2, ho nkela foromo ya Cv sebaka ka boemo ba C=1 ke:
Ho tsoa lipalo-palong, rea tseba hore C=1 le Cv=1.167 li lekana (ke hore, Cv=1.167C).
② Phetoho ea Cv le Kv
Ha Kv = 1, Q = 1m3 / h, ρ / ρ0 = 1, △ P = 100kPa ho nkela foromo ya Cv sebaka bakeng sa phetoho ya yuniti:
Ke hore, Kv = 1 e lekana le Cv = 1.156 (ke hore, Cv = 1.156Kv).
Ka lebaka la tlhahisoleseding e itseng le disampole tsa bokgoni ba phallo ya valve ya taolo C, coefficient ya phallo Kv le sistimi ya phallo Cv tse tharo tse se nang tshebetso ya ho tswa, tshebediso ya ho le bonolo ho hlahisa pherekano. Changhui Instrumentation C, Kv, Cv ho tswa tlhalosong, tshebediso ya yuniti le kamano pakeng tsa tse tharo tse tla hlakiswa, ho thusa baqapi ba boenjiniere tshebetsong ya ho laola kgetho ya valve le ho bala dipolelo tse fapaneng tsa coefficient ya phallo (C, Kv, Cv) bakeng sa phetoho le papiso, ho nolofatsa kgetho ya di-valve tse laolang ho feta kgetho.
Boleng ba CV ba li-valve tsa serurubele tsa Tianjin Zhongfa Valve ke tse latelang, haeba ho hlokahala, ka kopo sheba.