Cov xwm txheejAcuam ​​tshuam rauWpob ntseg ntawmHydraulicSandblastingFkev ua siab tawvNozzles

Kev hnav ntawm lub nozzle los ntawm hydraulic sandblasting dav hlau yog feem ntau yog cov khoom siv ntawm cov xuab zeb nyob rau sab hauv phab ntsa ntawm lub nozzle. Kev hnav ntawm lub nozzle yog qhov tshwm sim ntawm qhov kev txiav txim ntawm cov xuab zeb dav hlau nyob rau sab hauv phab ntsa ntawm lub nozzle. Nws yog feem ntau ntseeg hais tias macroscopic ntim poob ntawm lub puab nto ntawm lub nozzle vim hnav yog tsim los ntawm tsub zuj zuj ntawm cov khoom microscopic ntim poob los ntawm kev cuam tshuam ntawm ib qho xuab zeb particle. Kev yaig hnav ntawm cov xuab zeb nyob rau sab hauv ntawm lub nozzle feem ntau suav nrog peb hom: micro-txiav hnav, qaug zog hnav thiab hnav tawg tawg. Txawm hais tias peb daim ntawv hnav tshwm sim nyob rau tib lub sijhawm, vim muaj cov yam ntxwv sib txawv ntawm cov khoom siv nozzle thiab cov yam ntxwv ntawm cov xuab zeb hais, qhov kev ntxhov siab tom qab kev cuam tshuam yog sib txawv, thiab qhov feem ntawm peb cov ntaub ntawv hnav yog txawv.

1. Yam cuam tshuam rau lub nozzle hnav

1.1 Cov khoom tseem ceeb ntawm lub nozzle nws tus kheej

Tam sim no, cov khoom siv feem ntau siv los tsim cov dav hlau nozzles yog cov cuab yeej steel, ceramics, cemented carbide, dag pob zeb diamond, pob zeb diamond thiab lwm yam. Covmicrostructure, hardness, toughness thiab lwm yam khoom siv lub cev thiab txhua yam ntawm cov khoom muaj qhov cuam tshuam tseem ceeb ntawm nws qhov hnav tsis kam.

1.2 Internal flow channel qauv duab thiab geometric tsis.

Los ntawm kev simulation ntawm ntau hom nozzles, tus sau pom tau hais tias nyob rau hauv lub hydraulic sandblasting dav hlau system, qhov sib txawv ntawm qhov ceev nozzle yog zoo dua li cov streamlined nozzle, lub streamlined nozzle yog zoo dua li lub conical nozzle, thiab lub conical nozzle yog zoo dua. conical nozzle. Qhov hluav taws xob txoj kab uas hla ntawm lub nozzle feem ntau txiav txim siab los ntawm tus nqi ntws thiab siab ntawm lub dav hlau. Thaum tus nqi ntws tsis hloov, yog tias lub qhov hluav taws xob qhov hluav taws xob txo qis, lub siab thiab ntws tus nqi yuav loj dua, uas yuav ua rau muaj kev cuam tshuam kinetic zog ntawm cov xuab zeb hais thiab nce qhov hnav ntawm qhov hluav taws xob. Kev ua kom txoj kab uas hla ntawm lub dav hlau nozzle kuj yuav ua rau kom qhov hnyav hnyav, tab sis lub sij hawm no lub sab hauv nto poob, yog li qhov zoo tshaj plaws nozzle txoj kab uas hla yuav tsum tau xaiv. Cov txiaj ntsig tau txais los ntawm cov lej simulation ntawm nozzle flow field nrog sib txawv contraction ces kaum.

Yog xav paub ntxiv, flos yog conical nozzle, qhov me dua lub contraction Lub kaum sab xis, qhov ruaj khov ntawm qhov ntws, qhov tsis muaj zog dissipation tsawg dua, thiab tsawg dua hnav rau lub nozzle. Qhov ncaj cylindrical seem ntawm lub nozzle plays lub luag hauj lwm ntawm rectification, thiab nws qhov ntev-inch ratio yog hais txog qhov sib piv ntawm qhov ntev ntawm lub tog raj kheej seem ntawm lub nozzle mus rau txoj kab uas hla ntawm lub qhov hluav taws xob, uas yog ib qho tseem ceeb parameter rau hnav. Kev ua kom ntev ntawm lub nozzle tuaj yeem txo qhov hnav tus nqi ntawm qhov hluav taws xob, vim tias txoj hauv kev ntawm kev coj nkhaus mus rau qhov hluav taws xob txuas ntxiv mus. Lub inletangle ntawm lub nozzle muaj qhov cuam tshuam ncaj qha rau kev hnav ntawm sab hauv ntws. Thaum lub inlet contractionangle txo, qhov hluav taws xob coj tus nqi txo linearly.

1.3 Sab hauv roughness

Lub micro-convex nto ntawm phab ntsa sab hauv ntawm lub nozzle ua rau muaj kev cuam tshuam zoo rau cov xuab zeb-blasting dav hlau. Qhov cuam tshuam ntawm cov xuab zeb hais rau ntawm qhov tawm ntawm lub pob tuaj yeem ua rau lub ntsej muag micro-crack nthuav dav thiab ua kom lub ntsej muag abrasive ntawm lub nozzle. Yog li ntawd, txo qhov roughness ntawm sab hauv phab ntsa pab txo kev sib txhuam.

1.4 Kev cuam tshuam ntawm cov xuab zeb blasting

Quartz xuab zeb thiab garnet feem ntau siv hauv hydraulic sandblasting fracturing. Kev yaig ntawm cov xuab zeb ntawm cov khoom siv nozzle yog qhov tseem ceeb ntawm kev hnav, yog li hom, zoo li, particle loj thiab hardness ntawm cov xuab zeb muaj kev cuam tshuam zoo rau kev hnav ntawm lub nozzle.