Lub Net Positive Suction Head (NPSH) margin yog qhov tseem ceeb uas feem ntau saib tsis tau thaum xaiv lub twj tso kua mis. Nws yog qhov sib txawv ntawm NPSH muaj (NPSHa) ntawm lub twj tso kua misthiab NPSH xav tau (NPSHr) los ntawm lub twj tso kua mis ua haujlwm yam tsis muaj cavitation.
Dab tsi yog Net Positive Suction Lub taub hau hauv lub twj tso kua mis?
NPSH stands rau Net Positive Suction Lub taub hau thiab yog ib qho kev ntsuas ntawm lub siab uas tau ntsib los ntawm cov kua dej ntawm qhov nqus ntawm acentrifugal twj. … NPSH txhais tau tias yog tag nrho lub taub hau ntawm cov kua hauv nruab nrab kab ntawm lub impeller tsawg dua cov kua vapor siab.
Vim li cas thiaj hu ua Net Positive Suction Head?
Qhov sib txawv ntawm qhov nkag siab thiab qhov qis tshaj plaws hauv lub twj tso kua misyog hu ua NPSH: Net Positive Suction Head. NPSH yog li ntawd ib qho kev qhia ntawm qhov poob siab uas tshwm sim hauv thawj feem ntawm lub twj tso kua mis.
Koj pom lub taub hau nqus dej li cas?
Kev piav qhia: Txhawm rau xam NPSH Muaj, coj qhov chaw siab, ntxiv lub siab atmospheric, rho tawm qhov poob los ntawm kev sib txhuam hauv cov raj xa dej thiab rho tawm lub vapor siab ntawm cov kua. Cov txiaj ntsig sib npaug ntawm NPSHA (lossis Net Positive Suction Head Available) ntawm koj lub cev.
Ntawm qhov zoo nqus taub hau yog dab tsi?
NPSHR (Net Positive Suction Head Required) yog muab rau hauv cov ntaub ntawv rau txhua lub twj tso kua mis. NPSHR qhia qhovqis inlet siab xav tau los ntawm lub twj tso kua mis tshwj xeeb ntawm qhov muab ntws kom tsis txhob cavitation.
