Flash thiab cavitation ntawm regulating valve
Cov kua ntws hauv lub valve feem ntau muaj ob qhov tshwm sim: flash thiab cavitation. Lawv qhov tshwm sim tsis tsuas yog cuam tshuam rau kev xaiv thiab suav cov caliber, tab sis kuj ua rau lub suab nrov, kev co, cov khoom puas tsuaj thiab lwm yam. Nyob rau hauv cov ntaub ntawv no, lub neej ua hauj lwm ntawm lub regulating valve yuav luv heev, uas yog tsim nyog los piav qhia.
Raws li ib txwm muaj, raws li cov kua nruab nrab, cov dej ntws mus rau hauv, los ntawm thiab tawm ntawm cov regulator yog khaws cia ua kua.
Flash raws li lub xeev cov kua nruab nrab, ntws mus rau hauv lub regulator yog kua, ntws los ntawm lub regulator ntawm lub shrinkage point ntawm cov kua siab yog qis dua lub vaporization siab, cov kua nruab nrab rau hauv ib tug gaseous nruab nrab, thiab nws siab yuav tsis rov qab mus lub vaporization siab, qhov nruab nrab tau tseem gaseous thaum ntws tawm ntawm lub regulator.
Flash yog zoo li lub sandblasting tshwm sim, uas ua rau qis qis ntawm lub valve lub cev thiab kab, ua rau muaj kev yaig loj nyob rau sab hauv ntawm cov regulator thiab kab, thiab kuj txo cov peev xwm ntawm cov regulator.
Cavitation raws li lub xeev cov kua nruab nrab, ntws mus rau hauv lub regulator yog kua, ntws los ntawm lub regulator nyob rau hauv lub shrinkage ntawm cov kua siab yog qis dua lub vaporization siab, cov kua nruab nrab mus rau hauv ib tug gaseous nruab nrab, ces nws siab rov qab mus rau lub vaporization siab. , thiab thaum kawg nyob rau hauv lub outflow ntawm lub regulator ua ntej qhov nruab nrab rau hauv cov kua. Lub hav zoov ntawm cavitation tuaj yeem txiav txim siab ua ntej raws li qee qhov tshwm sim. Thaum cavitation pib, nws yuav ua rau lub suab "hissing", ib yam li lub suab ntawm pob zeb ntws los ntawm tus tswj hwm. Cavitation kev puas tsuaj rau cov tswj valve thiab cov internals yog zoo, thiab nws kuj txo cov khiav efficiency ntawm lub valve tswj, ib yam li flash.
Flash thiab cavitation ntawm regulating valve (Daim duab 1)
Yog li ntawd, kev ntsuas zoo yuav tsum tau coj los tiv thaiv lossis txo qis qhov tshwm sim ntawm flash lossis cavitation: Sim txhim kho lub regulator nyob rau hauv qhov chaw qis tshaj ntawm lub kaw lus, kom lub siab ntawm lub regulator inlet thiab qhov hluav taws xob yuav kuj nce.
b. Txhim kho qhov nres valve lossis throttle orifice phaj nce toj lossis nqes dej ntawm tus tswj hwm kom hloov pauv tus yam ntxwv ntawm lub siab poob qis ntawm tus tswj hwm (tus qauv no feem ntau siv tau zoo rau cov xwm txheej me me).
C. Kev xaiv tshwj xeeb los tiv thaiv cavitation internals kuj tseem tuaj yeem tiv thaiv flash lossis cavitation, uas tuaj yeem hloov pauv tus nqi ntawm cov kua hauv cov tswj valve, yog li ua kom lub siab sab hauv.
d. Sim xaiv cov khoom siv nyuaj ntawm cov tswj valve, vim hais tias nyob rau hauv qhov kev tshwm sim ntawm cavitation, rau xws li kev cai, nws muaj ib tug tej yam erosion kuj thiab hnav tsis kam, yuav ua rau cavitation nyob rau hauv tej yam kev mob, thiab yuav tsis ua puas lub sab hauv ntawm cov tswj. valve. Ntawm qhov tsis sib xws, rau kev tswj lub valve ntawm cov ntaub ntawv mos, vim nws qhov tsis zoo corrosion kuj thiab hnav tsis kam, thaum cavitation tshwm sim, cov khoom siv sab hauv ntawm lub valve yuav hnav sai sai, thiab yog li tsis tuaj yeem ua haujlwm ib txwm nyob rau hauv cov ntaub ntawv cavitation.
Hauv luv luv, tam sim no, tsis muaj cov khoom siv engineering uas tuaj yeem hloov kho rau cov cavitation nyob rau hauv cov xwm txheej hnyav, thiab nws tsuas tuaj yeem txheeb xyuas qhov tseeb ntawm lub hom phiaj xwm txheej thiab xaiv cov kev daws teeb meem tsim nyog.