Ua ke nrog cov lus nug uas yuav tsum muaj, feem ntau muaj kev tswj hwm nruj heev rau kev ua haujlwm ntawm tus pas nrig piston. Qhov no yog vim hais tias qhov zoo ntawm piston qws ua yuav ncaj qha mus rau lub neej thiab kev ntseeg ntawm tag nrho cov khoom. Nws yog feem ntau yuav tsum tau hais tias qhov chaw npoo ntawm qhov khoom tiav yog Ra 0.4 mus 0.8 μm, thiab cov kev cai rau coaxiality thiab hnav tsis ua hauj lwm yog nruj heev.
Feem ntau, piston pas nrig tiav qhov khoom yuav tsum ua raws li cov hauv qab no:
Ua ntej, pistis piston yuav tsum muaj zog txaus, rigidity thiab ruaj ntseg los xyuas kom meej siv;
Qhov thib ob, qhov khoom tiav lawm yuav tsum muaj kev coj zoo thiab kev ua kom siab thiab qhov yuav tsum tau ua kom muaj zog;
Qhov thib peb, cov qauv tsim ntawm lub piston pas nrig ua tiav cov khoom tsim nyog yuav tsum txo qaub ntawm kev nyuab siab concentration;
Qeb plaub, qhov txuas yuav tsum muaj kev sib ntseeg txhawm rau siv kom tsis txhob xoob;
Qhov tsib, qhov tsim ntawm piston qws qauv yuav tsum pab txhawb lub disassembly thiab sib dhos ntawm lub piston.
Raws li tuaj yeem pom los ntawm cov kev taw qhia saum toj no, qhov zoo ntawm tus pas nrig piston tseem ceeb heev. Hauv cov txheej txheem ntau lawm, cov txheej txheem tsis tas yuav tsum tswj kom nruj kom paub tseeb tias cov khoom tiav yog ua raws li cov kev cai ntawm theem pib.
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