Bearing yog dab tsi?

Lo lus bearing yog muab los ntawm dais, uas txhais tau tias txhawb nqa lossis nqa.

Thaum muaj kev sib txheeb ze ntawm ob ntu thiab yog tias ib feem txhawb nqa lwm qhov, qhov kev txhawb nqa yog hu ua bearing.

Yog li, cov kabmob yog ib qho khoom siv ntawm lub tshuab ua haujlwm uas txhawb nqa lwm yam khoom siv lossis ib feem uas yog nyob rau hauv kev sib raug zoo nrog nws.

Cov kev sib txheeb ntawm cov lus tsa suab yuav yog linear lossis rotary.

Raws li nyob rau hauv cov ntaub ntawv ntawm lub cav crosshead thiab cov kev taw qhia, cov kev taw qhia ua raws li bearings thiab cov txheeb ze cov lus tsa suab yog linear. Ib yam li ntawd, txoj kev ntawm cov tshuab milling thiab cov tshuab planar tuaj yeem raug kho raws li cov kabmob.

Raws li nyob rau hauv cov xwm txheej ntawm spindles ntawm lub tshuab dhos, drilling thiab tho txawv tshuab, axles ntawm tsheb, crankshafts, thiab lwm yam., cov txheeb ze ntawm cov no thiab bearing yog teb.

Xav tau Bearings.

Nyob rau hauv yuav luag tag nrho cov hom ntawm machinery, txawm lub zog los yog lub zog yuav tsum tau kis los ntawm lub rotating shafts, uas nyob rau hauv lem yog tuav los ntawm cov bearings.

Cov kabmob no tso cai rau kev sib hloov dawb thiab du ntawm cov ncej nrog kev sib txhuam yam tsawg kawg nkaus. Kev poob ntawm lub zog lossis kev txav tuaj yeem txo qis nrog cov lubrication ntawm cov kabmob uas tsim nyog.

Qhov tsim nyog lossis xav tau ntawm cov bearings yog rau ob lub hom phiaj hauv qab no.

1. Txhawm rau muab kev txhawb nqa rau rotating shafts.

2. Txhawm rau pub dawb thiab du kev sib hloov ntawm shafts.

3. Ua kom muaj zog thiab radial loads.

Hom Bearing.

Feem ntau, cov bearings tuaj yeem muab faib ua ob hom raws li hauv qab no:

1. Sliding contact bearings thiab;

2. Rolling contact bearings lossis tiv thaiv kev sib txhuam bearings.

1. Sliding Contact Bearings;

Sliding contact bearings thiab shafts muaj kev sib txheeb ze vim lawv zawv zawg nrog kev hwm rau ib leeg. Feem ntau, tag nrho cov bearings uas tsis siv chais thiab cov npas tuaj yeem raug hu ua zawv zawg cov kabmob.

Sliding Contacts Bearings tau muab faib ua ntau hom hauv qab no.

i. Txoj kab ncaj nraim los yog Kev Qhia Bearing;

Yog hais tias cov kev taw qhia ntawm cov txheeb ze cov lus tsa suab thiab zawv zawg ntawm qhov chaw yog tib yam, cov kabmob yog hu ua txoj kab ncaj nraim los yog coj cov kabmob xws li cov lus qhia ntawm lub cav hla lub taub hau, txoj kev milling tshuab thiab spindles ntawm drilling thiab tho txawv tshuab.

ii. Radial lossis Journal Bearing;

Yog hais tias tus txheeb ze txav ntawm ncej thiab bearing yog teb thiab yog hais tias lub load ua perpendicular mus rau lub axis ntawm lub ncej los yog raws lub vojvoog ntawm lub ncej, lub bearing yog hu ua journal bearing los yog radial bearing.

Ib feem ntawm cov ncej uas kaw los ntawm cov kabmob yog hu ua phau ntawv xov xwm.

iii. Thrust Bearing;

Yog hais tias lub load ntawm lub bearing yog parallel mus rau lub axis ntawm lub ncej, lub bearing yog hu ua thrust bearing.

ib iv. Ko taw kauj ruam los yog Pivot Bearing;

Nyob rau hauv thrust bearing, yog tias qhov kawg ntawm tus ncej xaus los ntawm so ntawm cov kabmob nto vertically, nws yog hu ua footstep bearing lossis pivot bearing.

v. dab tshos Bearing;

Nyob rau hauv thrust bearing, yog tias qhov kawg ntawm ncej txuas mus dhau thiab dhau ntawm cov kabmob nto, nws yog hu ua dab tshos bearing. Lub axis ntawm tus ncej tseem nyob kab rov tav.

vi. Bushed Bearing;

Ib yam yooj yim ntawm bushed bearing yog qhia nyob rau hauv ##Fig. 1.8 hauv qab no. Nws muaj lub cev cam khwb cia hlau thiab ib lub hav txwv yeem ua los ntawm tooj dag lossis phom phom.

Lub cev muaj lub hauv paus. Lub hauv paus yog ua hollow los txo qhov machining nto cheeb tsam. Ob lub qhov elliptical yog muab rau ntawm lub hauv paus rau bolting cov kabmob.

Ib lub qhov roj yog muab rau saum lub cev uas khiav los ntawm lub hav txwv yeem. Yog li, lubrication tuaj yeem ua tiav rau ncej thiab hav txwv yeem los ntawm cov roj qhov.

Sab hauv txoj kab uas hla ntawm lub hav txwv yeem yog sib npaug rau lub taub hau. Lub hav txwv yeem yog tsau imposition los ntawm grub ntsia hlau kom nws txoj kev sib hloov los yog zawv zawg nrog rau ncej yog tiv thaiv.

Yog hais tias Bush tau hnav tawm, nws yog hloov los ntawm ib qho tshiab. Cov ncej tuaj yeem muab tso rau hauv cov kabmob kawg nkaus xwb. Qhov no yog ib tug disadvantage ntawm no bearing.

Bushed bearing pom daim ntawv thov nyob rau hauv lub teeb loads thiab tsawg ceev.

vii. Pedestal Bearing;

Pedestal bearing yog nrov npe hu ua Plummer block. Nws tseem yog hu ua kev sib cais lossis faib cov ntawv xov xwm.

Nws muaj cov cam khwb cia hlau hu ua pedestal, cam khwb cia hlau hau, phom hlau brasses nyob rau hauv ob halves, ob me me steel square-headed blots thiab ob pawg hexagonal xauv ceev raws li qhia nyob rau hauv ##Fig. 1.9 hauv qab no.

Cov kabmob yog cais hom; nws yog ua rau ob halves.

Sab saum toj yog hu ua cap, uas yog fastened mus rau lub ntsiab lub cev hu ua pedestal los ntawm txoj kev ntawm square-headed bolts thiab hexagonal ceev.

Qhov kev sib cais lossis kev faib cov kabmob no ua rau yooj yim tso thiab tshem tawm cov ncej nrog rau ib nrab ntawm cov hav txwv yeem.

Cov bushes sib cais yog hu ua tooj dag lossis cov kauj ruam.

Ib tug snug yog muab nyob rau hauv ib tug qis cais Bush uas haum rau hauv lub qhov muab rau hauv lub cev.

Yog li hais tias kev sib hloov ntawm hav txwv yeem raug tiv thaiv nrog rau cov ncej, thiab kev txav ntawm axial yog tiv thaiv los ntawm txoj hlua caj dab flanges ntawm qhov kawg.

Cov khoom siv sib cais yog tooj dag, bronze, dawb hlau, thiab lwm yam.

Tus ncej rests tshaj lub sab phua bush. Lub sab sauv sib cais yog muab tso rau ntawm lub ncej, thiab thaum kawg, lub hau yog nruj nreem.

Ib qho kev tshem tawm me me yog sab laug ntawm lub hau thiab lub cev uas yuav pab tau thaum lub kaus mom qis dua vim kev cawm cov hav txwv yeem nrog cov kab tshiab.

Qhov no bearing pom nws daim ntawv thov nyob rau hauv kev kub ceev thiab txawv cov lus qhia ntawm lub load.

vii. Footstep bearing lossis Pivot bearing.

Nyob rau hauv footstep los yog pivot bearing, lub siab ua tib yam rau lub axis ntawm lub ncej thiab ncej rests nyob rau hauv cov kabmob ntawm nws ib kawg.

Nws muaj cov cam khwb cia-hlau ntsug ncig lub cev los yog lub cev nrog lub hauv paus thiab ib rab phom phom, raws li qhia hauv ## Daim duab. 1.10 hauv qab no.

Lub block muaj qhib kawg los ntawm qhov uas tus ncej yog ntxig. Lub ncej rests vertically ntawm ib tug steel disc uas muaj ib tug concave scating.

Lub disc yog tiv thaiv los ntawm kev sib hloov nrog rau cov ncej los ntawm txhais tau tias ntawm ib tug pin uas yog ib nrab muab tso rau hauv disc thiab lub cev.

Kev sib hloov ntawm hav txwv yeem nrog rau cov ncej yog tiv thaiv los ntawm txoj kev snug muab ntawm nws lub caj dab hauv qab dab tshos.

Cov kabmob no pom cov ntawv thov hauv tshuab ntawm textiles, ntawv, thiab lwm yam, siv rau lub teeb loads thiab qis ceev.

Nyob rau hauv footstep bearing, lubrication yog qhov nyuaj vim cov roj raug pov tawm sab nraud ntawm qhov chaw los ntawm lub zog centrifugal.

2. Rolling Contact Bearings lossis Anti-Friction Bearings.

Nyob rau hauv dov kev sib cuag bearings, qhov kev sib txheeb ntawm cov ncej thiab cov kabmob yog tshwm sim vim yog dov ntawm cov khoom thiab cov menyuam siv hauv cov kabmob.

Yog li cov no yog hu ua dov hu bearings lossis pob thiab cov menyuam bearings.

Kev sib txhuam ntawm cov kabmob yog tsawg dua li cov zawv zawg sib cuag bearings, thiab tsis muaj kev puas tsuaj ntawm cov tshuab uas yuav tsum tau pib thiab nres hauv qab load.

Yog li ntawd, cov bearings no hu ua anti-friction bearings.

Muaj ob hom kev tiv thaiv kev sib txhuam, thiab lawv yog;

1. Pob bearings thiab;

2. Cov menyuam bearing.

i. Pob Bearings;

Spherical npas yog siv rau hauv pob bearings.

Muaj ob hom pob bearings;

(i) Radial pob bearings thiab (ii) Thrust pob bearings.

Radial pob bearings yog siv rau nqa lub radial loads los yog loads perpendicular mus rau lub axis ntawm lub shafts, thaum lub thrust bearings yog siv rau lub thrust loads, piv txwv li, loads ua yeeb yam mus rau lub axis ntawm lub ncej.

Thrust pob bearings yog siv los nqa thrust loads ntawm shafts.

Lawv muaj cov pob hlau tawv uas muab tso rau ntawm ob qhov kev sib tw. Cov kev sib tw yog grooved hardened steel rings. Ib qho kev sib tw tig nrog cov ncej, thiab lwm qhov yog tsau rau hauv cov kabmob vaj tse.

Cov npas yog tuav nyob rau hauv txoj hauj lwm los ntawm txoj kev tawb. Cov tawb yog cov khoom sib cais ntawm cov khoom ua los ntawm cov tooj dag nias.

Qhov kev npaj ntawm qhov yooj yim thrust bearing yog qhia nyob rau hauv ##Fig. 1.11 hauv qab no. Lub thrust pob bearings yog siv mus txog qhov ceev ntawm 2000 rpm.

Rau siab dua speeds ntawm thrust loads, angular contact pob bearings yog siv. Nyob rau hauv kev kub ceev, cov npas raug yuam tawm ntawm cov kev sib tw vim yog lub zog centrifugal tsim nyob rau hauv lub thrust bearings.

ii. Cov menyuam Bearings;

Cov menyuam bearings tuaj yeem raug cais raws li radial roller bearings thiab thrust roller bearings. Radial thiab thrust roller bearings nqa radial thiab thrust loads feem.

Ob leeg cov kabmob no tuaj yeem raug cais ntxiv raws li cov hom kev siv, xws li cylindrical roller bearings, koob roller bearings, thiab tapered roller bearings.

Thaum piv rau cov pob bearings, cov menyuam bearings tsim kev sib txhuam ntau dua tab sis muaj peev xwm thauj khoom ntau dua. Rau kev siv lub teeb load, pob bearings yog siv uas nws cov txij nkawm tsawg dua li ntawm tib lub me me rau cov menyuam bearings.

Txawm li cas los xij, yog tias cov khoom hnyav hnyav thiab cov bearings yuav tsum muaj kev poob siab, tsuas yog siv cov menyuam bearings xwb.

Qhov zoo thiab qhov tsis zoo ntawm lub pob thiab cov menyuam bearings;

Thaum piv rau zawv zawg sib cuag bearings, rolling contact bearings muaj qhov zoo thiab qhov tsis zoo hauv qab no.

Qhov zoo.

1. Qhov pib thiab khiav kev sib txhuam yog tsawg.

2. Hloov tau yooj yim.

3. Yuav siv tau rau ob qho tib si radial thiab axial loads.

4. Lubrication yog yooj yim.

5. Tus nqi tu yog tsawg.

Qhov tsis zoo.

1. Tus nqi pib siab.

2. Yooj yim rau pom qhov tshwm sim ntawm cov kabmob tsis ua haujlwm.

3. High precision machining yog yuav tsum tau rau bearing vaj tse.