Lub hauv paus chiv keeb ntawm kev loj hlob
Daim ntawv thaum ntxov ntawm linear motion bearings yog tso ib kab ntawm cov ncej ntoo nyob rau hauv ib kab ntawm daim phiaj. Niaj hnub nimno linear motion bearings siv tib lub hauv paus ntsiab lus ua haujlwm, tab sis qee zaum siv cov pob es tsis txhob chais. Z' qhov yooj yim teb cov kabmob yog cov kabmob bushing, uas tsuas yog ib lub hav txwv yeem nyob nruab nrab ntawm lub log thiab lub qag. Qhov kev tsim no tom qab hloov los ntawm dov bearings, uas hloov cov thawj bushings nrog ntau cylindrical rollers, txhua yam zoo li ib lub log sib cais.
Ib qho piv txwv thaum ntxov ntawm lub pob bearing tau pom nyob rau ntawm lub nkoj Roman thaum ub ua nyob rau hauv 40 BC nyob rau hauv Lake Nami, Ltalis: ib tug ntoo pob bearing yog siv los pab txhawb ib tug rotating tabletop. Nws tau hais tias Leonardo da Vinci ib zaug tau piav qhia txog lub pob bearing nyob ib ncig ntawm 1500. Ntawm ntau yam tsis paub qab hau ntawm pob bearings, muaj ib qho tseem ceeb heev uas kev sib tsoo ntawm cov pob yuav ua rau muaj kev sib txhuam ntxiv. Tab sis qhov tshwm sim no tuaj yeem tiv thaiv tau los ntawm kev tso cov pob hauv cov tawb me me ib los ntawm ib qho. Nyob rau hauv lub xyoo pua 17th, Galileo tau piav qhia thaum ntxov ntawm" tawb pob" pob bearing. Thaum kawg ntawm lub xyoo pua 17th, British C. Wallo tau tsim thiab tsim cov pob bearings, thiab muab lawv tso rau ntawm cov tsheb thauj khoom xa tuaj rau kev sim siv, thiab British P. Tsim nyog tau txais patent rau pob bearings. Cov kabmob dov nrog lub tawb uas Z muab tso rau hauv kev siv thaum ntxov tau tsim los ntawm watchmaker John Harrison hauv 1760 los ua H3 chronograph. Thaum kawg ntawm lub xyoo pua kaum yim, German HR Hertz tau luam tawm ib daim ntawv ntawm kev sib cuag kev ntxhov siab ntawm pob bearings. Raws li lub hauv paus ntawm Hertz' qhov kev ua tiav, R. Stribeck ntawm lub teb chaws Yelemees, A. Palmgren ntawm Sweden thiab lwm tus tau ua ntau qhov kev sim, thiab tau pab txhawb rau txoj kev loj hlob ntawm dov bearing tsim txoj kev xav thiab qaug zog lub neej. xam. Tom qab ntawd, Russia tus NP Petrov tau siv Newton txoj cai lij choj ntawm viscosity los xam cov kabmob kev sib txhuam. Thawj patent ntawm pob channel tau txais los ntawm Philip Vaughan ntawm Carmarthen hauv 1794.
Feature ntawm bearing steel:
1. Hu rau lub zog qaug zog
Nyob rau hauv qhov kev txiav txim ntawm lub sij hawm thauj khoom, cov kabmob yog nquag ua rau qaug zog puas tsuaj thaum hu rau saum npoo, uas yog, tawg thiab tev tawm, uas yog qhov tseem ceeb ntawm kev puas tsuaj ntawm cov kabmob. Yog li ntawd, txhawm rau txhim kho lub neej kev pabcuam ntawm cov kabmob, cov kabmob steel yuav tsum muaj lub zog tiv taus siab zog.
2. Hnav tsis kam
Thaum lub sij hawm ua hauj lwm bearing, tsis tsuas yog dov kev sib txhuam tshwm sim ntawm lub nplhaib, dov lub caij thiab lub tawb, tab sis kuj zawv zawg kev sib txhuam tshwm sim, yog li ntawd cov bearings yog tas li hnav. Txhawm rau nce qhov hnav ntawm cov kabmob, tswj qhov raug thiab ruaj khov ntawm cov kabmob, thiab txuas ntxiv lub neej kev pabcuam, cov kabmob steel yuav tsum muaj kev hnav zoo.
3. Hardness
Hardness yog ib qho tseem ceeb ntawm kev coj tus kheej zoo, thiab nws muaj kev cuam tshuam ncaj qha rau kev tiv thaiv qaug zog, hnav tsis kam, thiab kev txwv elastic. Lub hardness ntawm bearing steel nyob rau hauv kev ua hauj lwm tej yam kev mob yuav tsum ncav cuag HRC61 ~ 65, uas enables cov bearings kom ncav cuag siab zog qaug zog thiab hnav tsis kam.
Nws yog txhim kho lub ncej kom nws tsuas tuaj yeem ua tiav kev sib hloov, thaum tswj nws cov axial thiab radial txav. Lub cev muaj zog tsis tuaj yeem ua haujlwm txhua yam tsis muaj bearings. Vim tias cov ncej yuav txav mus rau txhua qhov kev taw qhia, thiab lub cev muaj zog tsuas yog yuav tsum tig thaum nws ua haujlwm. Kev hais lus theoretical, nws tsis tuaj yeem ua tiav lub luag haujlwm ntawm kev sib kis. Tsis tas li ntawd xwb, tab sis cov kabmob tseem yuav cuam tshuam rau kev sib kis. Txhawm rau txo cov nyhuv no, lubrication zoo yuav tsum ua tiav ntawm cov bearings ntawm - ceev ncej. Qee cov bearings twb tau lubricated, uas yog hu ua pre - lubricated bearings. Feem ntau cov bearings yuav tsum muaj roj lubricating. Thaum khiav ntawm kev kub ceev, kev sib txhuam yuav tsis tsuas yog nce lub zog noj, tab sis qhov txaus ntshai tshaj yog tias nws yooj yim rau kev puas tsuaj rau cov bearings. Lub tswv yim ntawm tig zawv zawg kev sib txhuam rau hauv kev sib txhuam yog ib qho - sab, vim tias muaj qee yam hu ua zawv zawg kabmob.