Chii chinonzi NPSH uye nzira yekudzivirira cavitation phenomenon

NPSH ndiyo yakakosha parameter inoyera kugona kwepombi kana mamwe mashini emvura kudzivirira vaporization yemvura pasi pemamiriro chaiwo. Inomiririra yakawandisa simba payuniti huremu hwemvura papombi inopinza inodarika mhepo yekupisa.

Chiitiko che cavitation chinokonzerwa negasi rinogadzirwa nemvura pane inlet ye impeller pasi peimwe vacuum pressure panguva yekushanda kwepombi, ichiita mabhubhu. Aya mabhuru, pasi pekufamba kwezvimedu zvemvura, anokonzeresa kukukurwa kwesimbi pamusoro pe impeller, nekudaro kukuvadza impeller nedzimwe simbi. Kudzivirira cavitation, matanho anotevera anogona kutorwa:

Wedzera kupinza. Nekuwedzera inlet pressure, iyo fluid pressure inogona kuwedzerwa uye kuitika kwecavitation kunogona kuderedzwa.

Deredza kuyerera. Kuderedza kuyerera kwemvura kunogona kuderedza dhigirii yekuderera kwekumanikidzwa kwemvura, kuderedza kuumbwa kwemabhuru, uye kudzivirira kuitika kwecavitation phenomena.

Kuvandudza magadzirirwo emidziyo. Nekuvandudza chimiro chemidziyo, kudonha kwekumanikidza kwemvura kunogona kuderedzwa, kudzivirira zvinobudirira kuitika kwemabhuru uye cavitation.

Wedzera inoshanda cavitation margin. Inoshanda NPSHa ndiyo NPSHa yemudziyo (pipeline), iyo ine hukama nenzira yekuisa pombi. Kuwedzera kukosha kwayo kunogona kuwedzera iyo anti cavitation kuita kwepombi.

Deredza NPSH inodiwa. NPSHr ndiyo yakakosha parameter ye cavitation performance yepombi pachayo, uye kuderedza kukosha kwayo kunogona kuvandudza iyo anti cavitation mashandiro epombi.

Kuburikidza nematanho aya, cavitation inogona kudzivirirwa zvinobudirira uye yakajairika kushanda kwemapombi nemimwe michina yemvura inogona kuchengetedzwa.

Mapombi mazhinji anogona kuwedzera kureba kwavo, asi havagone kugadzirisa dambudziko recavitation. Iye VSPyakasimba vacuum self priming pombiine yakanaka anti cavitation performance, ine hurefu hwekuyamwa kwepamusoro pe8 metres, uye haizobudise cavitation phenomenon.