Axial clearance ntawm cov kabmob

 

Qhov hu ua kev coj uakev tshem tawm yog hais txog qhov ntau ntawm kev txav mus los thaum lubkev coj uatsis tau teeb tsa rau hauv lub qhov lossis lub tsev ntawm cov kabmob, kho ib sab ntawm lub nplhaib sab hauv lossis lub nplhaib sab nraud, thiab tom qab ntawd ua rau sab tsis kho txav mus rau radial lossis axially. Raws li kev taw qhia ntawm kev txav mus los, nws tuaj yeem faib ua radial clearance thiab axial clearance.

Qhov loj ntawm qhov chaw tshem tawm (hu ua qhov chaw ua haujlwm) thaum lub sijhawm ua haujlwm muaj feem cuam tshuam rau lub neej ntawm kev dov, qhov kub nce, suab nrov, kev co thiab lwm yam khoom ntawm cov kabmob.

Thaum ntsuas qhov kev tshem tawm ntawm cov kabmob, nws yog qhov hu ua qhov kev tshem tawm ntawm cov kabmob, uas yog hais txog qhov ntau ntawm kev txav mus los thaum cov kabmob tsis tau teeb tsa rau hauv lub qhov lossis lub tsev ntawm cov kabmob, kho ib sab ntawm lub nplhaib sab hauv lossis lub nplhaib sab nraud, thiab tom qab ntawd ua rau sab tsis ruaj khov txav mus rau radial lossis axially. Raws li kev taw qhia ntawm kev txav mus los, nws tuaj yeem muab faib ua radial clearance thiab axial clearance.

Qhov loj ntawm qhov chaw tshem tawm (hu ua qhov chaw ua haujlwm) thaum lub sijhawm ua haujlwm muaj feem cuam tshuam rau lub neej ntawm kev dov, qhov kub nce, suab nrov, kev co thiab lwm yam khoom ntawm cov kabmob.

Thaum ntsuas qhov clearance ntawm ib qhokev coj ua, ib qho kev ntsuas ntsuas tshwj xeeb feem ntau yog siv rau qhov kev coj tus kheej kom tau txais tus nqi ntsuas ruaj khov.

Yog li ntawd, tus nqi ntsuas tau loj dua qhov tseeb clearance (hu ua theoretical clearance), piv txwv li qhov ntau ntawm elastic deformation vim yog qhov ntsuas tau nce.

Txawm li cas los xij, nyob rau hauv cov ntaub ntawv ntawm cov menyuam bearings, qhov kev hloov pauv elastic no tsis tseem ceeb vim nws me me.

Qhov kev tshem tawm sab hauv ntawm cov kabmob ua ntej kev teeb tsa feem ntau yog qhia raws li kev tshem tawm theoretical.

Kev xaiv ntawm kev tshem tawm

Qhov kev tshem tawm tom qab rho tawm qhov ntau ntawm kev nthuav dav lossis kev cog lus ntawm lub nplhaib vim muaj kev cuam tshuam thaum lub bearing raug mounted rau ntawm lub ncej lossis hauv lub tsev los ntawm qhov kev tshem tawm theoretical hu ua "mounting clearance".

 

Qhov kev tshem tawm tom qab ntxiv lossis rho tawm qhov sib txawv ntawm qhov ntev vim qhov sib txawv ntawm qhov kub thiab txias sab hauv lub bearing hu ua "kev tshem tawm zoo".

Cov kabmob no tau teeb tsa nrog qhov chaw tshem tawm thaum nws muab tso rau hauv qab qee yam khoom siv kho tshuab, uas yog, qhov chaw tshem tawm zoo tau ntxiv rau qhov kev hloov pauv elastic los ntawm cov khoom thauj, yog li nws hu ua "kev tshem tawm ua haujlwm".　

 

Thaum qhov chaw ua haujlwm me ntsis tsis zoo, lub neej qaug zog ntawm cov kabmob yog ntev tshaj plaws, tab sis nrog qhov chaw tsis zoo nce ntxiv, lub neej qaug zog txo qis ntau heev. Yog li ntawd, thaum xaiv qhov chaw ntawm cov kabmob, feem ntau nws raug nquahu kom ua qhov chaw ua haujlwm xoom lossis me ntsis zoo.

Tsis tas li ntawd xwb, thaum tsim nyog los txhim kho qhov nruj ntawm cov kabmob lossis txo qhov suab nrov, qhov kev tshem tawm ua haujlwm yuav tsum tsis zoo ntxiv, thiab thaum qhov kub nce siab ntawm cov kabmob hnyav, qhov kev tshem tawm ua haujlwm yuav tsum zoo ntxiv, thiab lwm yam, thiab kev tshuaj xyuas tshwj xeeb yuav tsum tau ua raws li cov xwm txheej siv.

 

Lub tswv yim ntawm kev tshem tawm hauv cov kabmob dov

1. Kev tshem tawm thawj zaug

Qhov chaw seem hauv lub xeev dawb ua ntej kev teeb tsa cov kabmob. Qhov chaw seem thawj zaug yog txiav txim siab los ntawm kev ua thiab sib dhos ntawm lub Hoobkas tsim khoom.

 

2. Kev teeb tsa ntawm qhov chaw tshem tawm

Nws tseem hu ua qhov sib dhos, uas yog qhov sib dhos thaum lub bearing, ncej thiab lub rooj zaum bearing tau teeb tsa tab sis tseem tsis tau ua haujlwm. Vim muaj kev cuam tshuam kev teeb tsa, ob qho tib si lub nplhaib sab hauv loj dua, lub nplhaib sab nraud txo qis, lossis ob qho tib si, qhov sib dhos me dua li qhov sib dhos thawj.

 

3. Kev tso cai ua haujlwm

Thaum cov kabmob nyob rau hauv lub xeev ua haujlwm, qhov kub nce ntawm lub nplhaib sab hauv yog qhov loj tshaj plaws, thiab qhov thermal nthuav dav yog qhov loj tshaj plaws, yog li ntawd qhov kev tshem tawm ntawm cov kabmob raug txo qis; Tib lub sijhawm, vim yog qhov hnyav, qhov kev hloov pauv elastic tshwm sim ntawm qhov sib cuag ntawm lub ntsiab lus dov thiab txoj kev sib tw, uas ua rau qhov kev tshem tawm ntawm cov kabmob nce ntxiv. Seb qhov kev tshem tawm ntawm kev ua haujlwm ntawm cov kabmob loj dua lossis me dua qhov kev tshem tawm ntawm kev teeb tsa nyob ntawm qhov cuam tshuam ua ke ntawm ob yam no.