valavu yolumikizira ma hydraulic relief LADRV-10

khalidwe

Chomwe chimatchedwa valavu yaing'ono yoyendetsa kayendedwe kake, monga dzina lake limatanthawuzira, ndi valve yolamulira yokhala ndi mphamvu zochepa zozungulira.

Kuthamanga kwa valve ndi chiwerengero cha valve mphamvu pansi pamikhalidwe yogwirizana. China ikuimiridwa ndi mtengo wa C. Zimatanthauzidwa kuti: pamene valavu imatsegulidwa mokwanira, pamene kusiyana kwapakati kusanayambe ndi pambuyo pa valve ndi 1kg / cm2 ndipo kulemera kwapakati ndi 1g / cm3, misa yapakati (m3 / hr) ikuyenda mu valve ola lililonse. Kwa madzimadzi osasunthika, pansi pa chipwirikiti chonse (pamene nambala ya Reynolds ndi yayikulu mokwanira, Re> 10 5 yamadzi; Re> 5.5×104 ya mpweya)

Kumene:

△ kusiyana kwa p-pressure isanayambe komanso itatha valavu (kg / cm2) υ-pakatikati kuuma (g/cm3)

Q-Media kuyenda (m3/h)

United States ndi mayiko ena amagwiritsa ntchito mtengo wa c kusonyeza mphamvu yothamanga ya valve. Miyezo yodziwika padziko lonse lapansi ya I, E ndi C makamaka yokhudzana ndi magetsi amagwiritsa ntchito mtengo wa Av kuwonetsa kuchuluka kwa ma valve. Ubale wa kutembenuka pakati pawo uli motere:

Cv =1 ．17 C Cv =10 6 /24Av C=10 6 /28Av

Kuthamanga kwa valve kumangotengera kapangidwe ka valve yokha. Powerengera mphamvu yothamanga ya valve yofunikira, ziyenera kuzindikiridwa kuti kayendedwe ka kayendedwe ka valve kadzakhala kosiyana kwambiri pamene sing'anga ndi yosiyana kapena mikhalidwe yothamanga ndi yosiyana.

Pankhani ya kuchepa kwazing'ono, makamaka viscous fluid ndi kutsika kwapansi, choletsa chachikulu cha madzimadzi nthawi zambiri chimakhala chalaminar kapena chosakanikirana cha laminar ndi kutuluka kwa chipwirikiti. Mukuyenda kwa laminar, pali mgwirizano wapakati pakati pa kayendedwe kapakati kupyola mu valve ndi kusiyana kwa kuthamanga musanayambe ndi pambuyo pake. M'malo osakanikirana a laminar ndi kutuluka kwa chipwirikiti, ndi kuwonjezeka kwa chiwerengero cha Reynolds, ngakhale kusiyana kwapakati kumakhala kosalekeza, misa ya dielectric ikuyenda kupyolera mu valve idzawonjezeka. Mu chipwirikiti chathunthu, kuchuluka kwakuyenda sikusintha ndi nambala ya Reynolds. Komabe, kusankha valavu yowongolera yoyenda pang'ono kumachitidwabe ndi njira zachikhalidwe ndi mawerengedwe amitundu. Komabe, mtengo wowerengeredwa umapatuka kwambiri pamtengo weniweniwo. Malinga ndi deta, CV ikakhala pansi pa Cv=0.01, imangogwiritsidwa ntchito ngati index index ndipo imakhala ndi tanthauzo. Mphamvu yeniyeni yozungulira iyenera kutsimikiziridwa molingana ndi