Gasket sealing mechanism
Kev xau yog qhov nruab nrab los ntawm sab hauv ntawm qhov chaw finite mus rau sab nraud, lossis los ntawm sab nraud mus rau sab hauv ntawm qhov chaw finite ntawm tib neeg tsis xav kom tshwm sim. Media ntws los ntawm qhov sib cuam tshuam ntawm qhov chaw sab hauv thiab sab nraud, uas yog, sealing nto to. Lub hauv paus ua rau cov dej xau yog qhov muaj qhov sib txawv ntawm qhov sib cuag ntawm qhov chaw, thaum lub siab sib txawv ntawm ob sab ntawm qhov chaw sib cuag, qhov sib txawv ntawm qhov sib txawv yog lub zog tsav ntawm qhov to. Vim yog daim ntawv sealing nto thiab kev ua haujlwm raug thiab lwm yam, uas ua rau lub sealing nto tsis zoo tag nrho, uas yog, lub sealing nto yuav tshwm sim ntawm qhov sib txawv, thiab yog li cov dej ntws tawm. Txhawm rau txo cov dej xau, nws yog ib qho tsim nyog yuav tsum ua kom pom qhov sib txuas ntawm qhov chaw sib cuag, piv txwv li kom txo qhov ntu ntu ntawm cov xau channel thiab ua kom muaj kev tiv thaiv to kom nws ntau dua li lub zog xau. Siv compressive load rau ntawm qhov chaw sealing tuaj yeem tsim kev ntxhov siab, txhim kho qib ntawm kev sib cuag ntawm lub sealing nto, thaum muaj kev ntxhov siab ntau txaus ua rau cov yas deformation tseem ceeb ntawm qhov chaw, nws tuaj yeem ua rau qhov sib txawv ntawm qhov sealing nto, txhawm rau thaiv. lub leakage channel. Lub hom phiaj ntawm kev siv gaskets yog los sau qhov tsis sib xws me me ntawm lub sealing nto ntawm lub flange nrog kev pab los ntawm cov khoom siv gasket uas yooj yim dua los tsim cov yas deformation nyob rau hauv qhov kev txiav txim ntawm compression load, thiaj li kom paub qhov sealing.
Nyob rau hauv flange sealing pob qij txha, lub zog ntawm compression gasket deforms cov khoom gasket, yog li sau cov micro-kawg ntawm flange sealing nto.
Cov ntaub ntawv xau hauv gasket kaw cov pob qij txha
Hauv flange sealing pob qij txha, lub gasket yog lub ntsiab sealing. Rau cov khoom siv tsis yog xim hlau, kev sib khi ntawm kev sib txuas yog tsim los ntawm kev nruj ntawm cov bolts, ua rau lub flange thiab gasket tiv thaiv nto thiab gasket sab hauv loj compressive kev nyuaj siab, ntawm ib sab, ua rau lub gasket nto thiab flange nto ze rau ntawm lub gasket. flange nto, sau lub flange nto ntawm lub microgap, ntawm qhov tod tes, txo cov porosity ntawm cov khoom siv gasket, piv txwv li, txo cov dej ntws tawm ntawm cov kua dej raug kaw. Raws li txhua txoj kev ua tsis tuaj yeem tsim kom muaj qhov zoo tshaj plaws ntawm qhov chaw, nws tseem tsis tuaj yeem ua tiav qhov sealing nto ntawm qhov sib xyaw ua ke thiab lub foob nws tus kheej qhov pore tag nrho thaiv, yog li nyob rau hauv kev sib cuag nrog txhua lwm yam ntawm sealing nto thiab sealing ntawm lub sealing. sab hauv ib txwm muaj qhov sib txawv me me lossis channel. Yog li, rau gasket sealing, to yog ib txwm inevitable. Thaum lub nruab nrab ntawm ib tug tej yam siab los ntawm lub bolt - flange kev twb kev txuas, ib txwm nyob rau hauv lub sealing point ntawm lub to. Kev soj ntsuam ntawm qhov tshwm sim no tuaj yeem pom, qhov xau yog nyob rau hauv ob daim ntawv, uas yog, "interface to leakage" thiab "tog to" raws li qhia hauv daim duab 2.
1. Interface leakage
Tsis txaus gasket compression kev ntxhov siab, flange sealing nto roughness, thermal deformation, mechanical deformation thiab vibration ntawm lub raj xa dej yuav ua rau lub gasket thiab flange sealing nto ntawm qhov tsis zoo thiab to. Tsis tas li ntawd, flange sib koom ua haujlwm vim qhov kub thiab txias, siab, ntsia liaj qhov rooj deformation thiab elongation, gasket creep so, rebound muaj peev xwm poob, gasket cov khoom laus, deterioration, thiab lwm yam yuav ua rau to ntawm flange thiab flange sealing nto. Qhov no tshwm sim nyob rau hauv lub gasket thiab flange sealing nto ntawm qhov to yog hu ua "interface to leakage".
2. Kev nkag mus
Cov pa roj carbon monoxide feem ntau yog ua los ntawm cov nroj tsuag fibers, tsiaj fibers, ntxhia fibers lossis tshuaj fibers thiab roj hmab sib txuas thiab nias, los yog ua los ntawm cov khoom ntxeem tau xws li graphite hloov tau. Vim nws cov ntaub so ntswg tsis zoo, tsis zoo densification, muaj ntau qhov sib txawv me me ntawm cov fibers thiab fibers, yog li nws yooj yim rau soaked los ntawm nruab nrab, tshwj xeeb tshaj yog nyob rau hauv siab, qhov nruab nrab yuav nkag mus rau hauv lub pores nyob rau hauv cov khoom. Qhov no tshwm sim nyob rau hauv cov khoom siv gasket sab hauv lub to yog hu ua "kev nkag mus rau hauv av".
