Yuav Ua Li Cas O-rings Ua Haujlwm

Yuav ua li cas O-rings ua haujlwm

O-ring yog ib qho yooj yim thiab siv ntau hom ntawm cov ntsaws ruaj ruaj rau ntau qhov zoo li qub thiab cov ntawv thov nquag. Kev tsim qauv ntawm O-ring groove yog qhov yooj yim - kev lag luam pheej yig thiab txhim khu kev qha tau txais los ntawm kev ua raws cov cai ntawm kev tsim cov zawj puab. Qhov zoo ntawm O-nplhaib rov qab mus rau nws qhov qub qauv thaum tus ntoo khaub lig-sib piv ua ke yog qhov laj thawj rau O-ring ua kom zoo foob.

Yeej, O-ring foob muaj qhov ncaj ncaj kab sib tshooj uas txuas mus rau hauv O-ring groove, muab qhov pib ua kom tiav.

Qhov quab yuam uas yuav tsum muaj rau O-ntiv nplhaib yog qhov tshwm sim ntawm qhov nyuaj thiab hla-ntu txoj kab uas hla. Qhov nro ntawm O-ring kis tau los ntawm kev sib tshooj sib tshooj, uas txo kev tuav pov hwm lub peev xwm ntawm O-ring foob.

Lub ntuj elasticity ntawm roj hmab teb muab ib lub foob ntawm xoom lossis tsis tshua muaj siab. Qhov kev ua tau zoo tuaj yeem txhim kho tau los ntawm nce radial extrusion. Qhov no nce nyob rau hauv extrusion tuaj yeem muaj lub siab dua qhov siab dynamic foob qhov cuam tshuam.

Radial extrusion muab kev sib txhuam ntawm O-ntiv nplhaib thiab qhov zawj uas tuav nws qhov chaw. Txheeb kom deform, cov roj hmab compound ntws tawm mus rau hauv qhov sib txawv extrusion, kiag li sealing nws tiv thaiv xau dej kom txog thaum lub siab thov yog txaus kom kov yeej kev sib txhuam thiab deformation ntawm O-ntiv nplhaib rau hauv qhov me me extrusion kis (kwv yees tias cov roj hmab tau mus txog qhov nws txwv ntws hauv qhov siab, nce ntxiv hauv kev quab yuam yuav ua rau poob tsis dhau ntawm shear lossis extrusion).

Qhov zawj yog tsim los muab thawj qhov kev txiav txim siab hla lub cev ntawm 7% mus rau 30% ntawm qhov foob feem pua.Qhov qhov ntsuas quab yuam feem ntau yog txiav txim siab mus rau qhov ntau ntawm cov quab yuam. Muaj qhov pub dawb ntawm qhov slots ntawm lwm lub axes.

Thaum muab siab siv, O-ntiv nplhaib txav mus rau qhov qis siab ntawm lub zawj. Lub siab sib khi tau hloov mus rau saum npoo yuav tsum tau muab khi, uas yog qhov siab tshaj qhov ntsuas lub zog sib zog los ntawm qhov nqi sib npaug los ntawm qhov pib cuam tshuam siab.

Ua kom muaj kev ntxhov siab ntxiv ntawm kev cuam tshuam ntawm lub foob thiab mating nto tshwm sim los ntawm cov ntawv thov. Txawm hais tias qhov xwm txheej no tseem muaj, O-lub nplhaib yuav txuas ntxiv mus rau qhov tsis xws luag thiab muaj kev ntseeg siab txog ntau pua phaus ntawm cov quab yuam, kwv yees tias O-ring raug xaiv kom raug qhov loj thiab qhov zawj yog machined rau qhov tsim nyog loj.

Nrog qhov nce ntawm lub siab, lub nplhaib deformation yuav ua rau exaggerated, thiab thaum kawg nyem ib feem ntawm lub nplhaib mus rau qhov sib nrug extrusion. Yog hais tias qhov extrusion clearance loj dhau, ces lub foob uas tag nrho extruded los ntawm kev kub siab yuav poob.

Thaum lub siab tawm ntawm cov roj hmab sib txuas, lub elasticity ntawm O-nplhaib rov qab rau nws cov duab ntuj, npaj rau lub voj voog zoo sib xws.

Cov ntaub ntawv no, nyob rau lawv qhov kev ua haujlwm ib txwm kub, yuav luag tsis yooj yim yuav zaws thiab muaj qhov tsis tshua muaj ywj elastic. Lawv cov duab tuaj yeem hloov tau (tsis yog lawv qhov ntim) thiab qhov radial nyem thov yuav ua rau muaj qhov nce ntawm qhov ntev ntawm kev foob thoob plaws ntawm qhov zawj.

Qhov nce no yuav muaj ntau dua qhov tshwm sim ntawm cov roj hmab txuas ntxiv thiab kho qhov kub vim qhov kev sib raug zoo ntawm kev sib khi ntawm cov kua dej thiab cov khoom siv. Lub thawv dej yuav tsum muaj qhov loj me rau kev tso cai rau cov roj hmab sib txuas ntxiv lossis cov khoom siv tivthaiv yuav tsim kom muaj kev ntxhov siab heev.

Thaum lub zog txaus thov, O-nplhaib yuav txav mus rau sab tsis tshua muaj siab kom txog rau thaum nws cov nplaim tiv tauj ntawm qhov zawj. Ntxiv siab lossis quab yuam yuav nyem qhov deformed O-ring mus rau qhov sib txawv. O-ring yuav xub pib txiav kom" d" duab. Qhov kev hloov pauv no nce qhov pib sib tshooj ntawm thaj chaw sib chwv yog 70% - 80%. Qhov sib tiv tauj thaj tsam ntawm O-ntiv nplhaib hauv qhov siab siab yog kwv yees li ob zaug ntawm qhov qub geometry ntawm lub siab.

Lub peev xwm ntawm kev sib khi extrusion tsis txwv rau kev siv dynamic. Hauv kev siv cov hluav taws xob zoo li qub, qhov nro ntawm cov kev sib dhos ntsia liaj qhov rooj siab dua qhov siab tuaj yeem qhib qhov sib txawv extrusion txaus kom tso tawm tuaj.

Qhov siab tsis pub dhau sab hauv yog txiav txim siab los ntawm kev tshem tawm thiab qhov nyuaj ntawm lub nplhaib foob (qee cov ntaub ntawv yog qhia hauv daim duab saum toj no). Hauv kev coj ua, cov khoob tsis zoo li qub feem ntau tau hais tseg rau lub nplhaib muab thiab daim ntawv thov. Yog tias ua haujlwm ntawm qhov kub tsis tshua muaj kev kub ntxhov, nws yuav tsim nyog txo qog qhov tob kom them nyiaj rau cov nplhaib sib cog lus thiab muab qhov yuav tsum tau nyem nyob hauv qhov loj me me.

Ntawm qhov ntsuas kub no ntawm lwm qhov kawg ntawm qhov sib npaug, nws yuav xav tau kom nce qhov zawj tob tob me ntsis kom tsis txhob hla kev txhaws ntawm lub nplhaib ntawm qhov ntsuas kub. Cov nyhuv no tuaj yeem yog qhov tseem ceeb ntawm qhov kub tsis txias vim tias cov coefficient ntawm thermal expansion ntawm elastomers yog siab dua li ntawm cov hlau.