Kev hnav nrawm yog tshwm sim los ntawm cov khoom xws li machining, sib dhos, thiab kev hloov kho ntawm lub tshuab tshiab, uas ua rau muaj kev sib txhuam ntawm qhov chaw, me me ntawm qhov chaw sib txuas, thiab qhov tsis sib xws ntawm qhov siab. Thaum lub sijhawm ua haujlwm tshuab, qhov tsis sib xws ntawm qhov chaw ntawm qhov chaw sib cuam tshuam thiab rub tawm rau ib leeg, thiab cov khib nyiab hlau hnav tawm ua haujlwm zoo li abrasive, ntxiv rau kev hnav ntawm cov mating nto. Yog li ntawd, qhov so - nyob rau hauv lub sij hawm yog nquag hnav ntawm qhov chaw (tshwj xeeb tshaj yog mating nto). Overloading thaum lub sijhawm no tuaj yeem ua rau muaj kev puas tsuaj rau qhov chaw thiab ua tsis tiav ntxov.
Lub lubrication tsis zoo kuj yog ib qho teeb meem. Cov khoom sib dhos tshiab tshiab muaj qhov tshem tawm me me, thiab vim yog kev sib dhos thiab lwm yam laj thawj, nws yog ib qho nyuaj los xyuas kom meej qhov tsis sib xws. Lubricating roj (greasy) tsis tuaj yeem yooj yim tsim cov roj pleev xim rau ntawm qhov chaw sib txhuam kom tsis txhob hnav. Qhov no txo cov roj lubrication efficiency thiab ua rau ntxov ntxov abnormality ntawm lub tshuab qhov chaw. Hauv qhov xwm txheej hnyav, nws tuaj yeem ua rau khawb lossis khawb ntawm qhov tseeb- haum rau qhov chaw sib txhuam, ua rau muaj kev ua haujlwm tsis zoo.
Loosing ntawm tshiab machined thiab assembled qhov chaw yuav tshwm sim vim deviations nyob rau hauv geometry thiab dimensional haum. Thaum lub sij hawm pib siv, cov khoom no yog yooj yim rau loosening vim alternating loads xws li kev cuam tshuam thiab kev co, nrog rau tej yam xws li tshav kub, deformation, thiab ceev ceev.
Cov dej xau kuj tuaj yeem tshwm sim vim xoob ntawm qhov chaw, kev co, thiab cua sov. Qhov no tuaj yeem ua rau xau ntawm qhov chaw sib khi thiab cov yeeb nkab txuas. Qee qhov casting thiab machining defects tej zaum yuav nyuaj rau nrhiav tau thaum lub sij hawm sib dhos thiab debugging, tab sis cov tsis xws luag yog raug los ntawm kev co thiab cuam tshuam thaum lub sij hawm ua hauj lwm, manifesting li roj (dej) to. Yog li ntawd, kev xau yog tshwm sim thaum lub sijhawm so - nyob rau lub sijhawm.
Kev ua haujlwm yuam kev, feem ntau yog vim tsis muaj kev nkag siab ntawm lub tshuab cov qauv thiab kev ua haujlwm (tshwj xeeb tshaj yog rau cov neeg ua haujlwm tshiab), tuaj yeem ua rau muaj kev ua haujlwm tsis zoo lossis txawm tias muaj kev sib tsoo tshuab.
