Coefficient ya valve igenzura (Cv, Kv na C) ya sisitemu zitandukanye zigizwe ni valve igenzura munsi yumuvuduko utandukanye, ubwinshi bwamazi azenguruka mugice cyigihe iyo valve igenzura ifunguye neza, Cv, Kv na C hari isano hagati ya Cv = 1.156Kv, Cv = 1.167C. Iyi ngingo isangiye ibisobanuro, ubumwe, guhinduka hamwe nuburyo bukomoka kuri Cv, Kv na C.
1 、 Ibisobanuro bya coefficient
Ubushobozi bwo kugenzura ububiko bwamazi ni amazi yihariye mubushyuhe bwihariye, iyo valve irangiye kubice bitandukanya igitutu, umubare wamazi yatemba anyura mumashanyarazi mugihe cyigihe, ukoresheje sisitemu itandukanye yibice mugihe hari uburyo butandukanye bwo kwerekana.
Ibisobanuro bya coefficient C.
Urebye inkorora, ubushyuhe bwa 5-40 ℃ amazi, itandukaniro ryumuvuduko wa valve hagati yimpande zombi za 1kgf / cm2, ingano yimigezi inyura muri valve kumasaha (yerekanwe muri m3) .C ni coeffisente yimigezi ya metero isanzwe, igihugu cyacu kera cyakoreshejwe igihe kinini, cyahoze kizwi nkubushobozi bwikwirakwizwa rya C.
Ibisobanuro bya coefficient ya Kv
Urebye inkorora, itandukaniro ryumuvuduko hagati yimpande zombi za valve ni 102kPa, ubushyuhe bwamazi 5-40 ℃, ubwinshi bwamazi atembera mumashanyarazi (isaha muri m3). kv nuburyo mpuzamahanga bwibice bitwara coefficient.
Ibisobanuro bya coefficient ya Cv
Ingano y’amazi ku bushyuhe bwa 60 ° F inyura mu cyuma kigenzura ku munota (bigaragarira muri gallon yo muri Amerika gal) yo mu bwonko bwatanzwe hamwe n’umuvuduko utandukanye wa 1lb / in2 kuri buri mpera ya valve.Cv ni coefficente yu bwami.
2 、 Inkomoko ya formulaire ya sisitemu zitandukanye
Ubushobozi bwo kuzenguruka C formula hamwe nibice
Γ 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：
Iyo γ / γ0 = 1, Q = 1m3 / h, △ P = 1kgf / cm2, niba C isobanuwe nka 1, hanyuma N = 1. Inzira hamwe nubushobozi bwo kuzenguruka C nuburyo bukurikira:
Muri formula C nubushobozi bwo kuzenguruka; Q igice ni m3 / h; γ / γ0 ni uburemere bwihariye; Unit P igice ni kgf / cm2.
② Flow coefficient Cv yo kubara hamwe nibice
Iyo ρ / ρ0 = 1, Q = 1USgal / min, ∆P = 1lb / in2, kandi niba Cv = 1 isobanuwe, noneho N = 1. Inzira hamwe nibice bya coefficient Cv nibi bikurikira:
aho Cv ni coefficient de flux; Q iri muri USgal / min; ρ / ρ0 nubucucike bwihariye; na ∆P iri muri lb / in2.
③ Flow coefficient Kv yo kubara hamwe nibice
Iyo ρ / ρ0 = 1, Q = 1m3 / h, ΔP = 100kPa, niba Kv = 1, noneho N = 0.1. Inzira hamwe nibice bya coefficient Kv nibi bikurikira:
aho Kv ni coefficient de flux; Q iri muri m3 / h; ρ / ρ0 nubucucike bwihariye; ΔP iri muri kPa.
3 Guhindura ubushobozi bwo kuzenguruka C, coefficient ya Kv, coefficient Cv
① coefficient ya Cv nubushobozi bwo kuzenguruka C isano
aho bizwi ko Q iri muri USgal / min; ρ / ρ0 nubucucike bwihariye; na ∆P iri muri lb / in2.
Iyo C = 1, Q = 1m3 / h, γ / γ0 = 1 (ni ukuvuga, ρ / ρ0 = 1), na ∆P = 1kgf / cm2, gusimbuza formula ya Cv hamwe na C = 1 ni:
Duhereye ku mibare, tuzi ko C = 1 na Cv = 1.167 bihwanye (ni ukuvuga Cv = 1.167C).
Guhindura Cv na Kv
Iyo Kv = 1, Q = 1m3 / h, ρ / ρ0 = 1, △ P = 100kPa isimbuza Cv formula yo guhindura ibice:
Ni ukuvuga, Kv = 1 ihwanye na Cv = 1.156 (ni ukuvuga, Cv = 1.156Kv).
Bitewe namakuru amwe hamwe nicyitegererezo cyubugenzuzi bwa valve ubushobozi bwo gutembera C, coefficient ya Kv na sisitemu ya Cv eshatu kubura uburyo bwo gukuramo, gukoresha byoroshye kubyara urujijo. Igikoresho cya Changhui C, Kv, Cv uhereye kubisobanuro, gushyira mubikorwa hamwe nubusabane hagati yabatatu bigomba gusobanurwa, kugirango bafashe abashinzwe ubwubatsi mugikorwa cyo kugenzura ihitamo rya valve no kubara imvugo itandukanye ya coefficient zitemba (C, Kv, Cv) kugirango bahindure kandi bagereranye, kugirango boroherezwe guhitamo kugenzura ibiciro kuruta guhitamo.
Indangagaciro za CV zinyugunyugu za Tianjin Zhongfa Valve nizi zikurikira, nibiba ngombwa, nyamuneka reba.