Cov khoom siv coj los siv hauv cov twj centrifugal feem ntau muab faib ua ob pawg: cov khoom siv hlau thiab cov khoom tsis yog xim hlau.

Cov khoom siv hlau

Cov ntaub ntawv hlau feem ntau siv cov ntaub ntawv hlau rau zawv zawg bearings muaj xws li cov kabmob alloys (tseem hu ua Babbitt alloys lossis dawb alloys), hnav-resistant cam khwb cia hlau, tooj liab-raws li thiab aluminium-raws li alloys.

1. Cov kabmob Alloy

Lub ntsiab alloy ntawm bearing alloys (tseem hu ua Babbitt alloys los yog dawb alloys) yog tin, lead, antimony, tooj liab, antimony, thiab tooj liab, uas yog siv los txhim kho lub zog thiab hardness ntawm alloy. Feem ntau ntawm cov kabmob alloy muaj cov ntsiab lus melting tsawg, yog li lawv tsim nyog rau kev ua haujlwm hauv qab 150 ° C.

2. Copper-based Alloy

Copper-raws li alloys muaj ntau dua thermal conductivity thiab zoo hnav tsis kam tshaj hlau. Thiab cov tooj liab-raws li alloy muaj kev ua haujlwm zoo thiab lubricity, thiab nws cov phab ntsa sab hauv tuaj yeem ua tiav, thiab nws yog nyob rau hauv kev sib cuag nrog tus ncej du. 

Cov khoom siv tsis yog xim hlau

1. PTFE

Nws muaj qhov zoo ntawm tus kheej lubricating zog thiab siab thermal stability. Nws cov coefficient kev sib txhuam me me, nws tsis nqus dej, tsis nplaum, tsis yog nplaim taws, thiab tuaj yeem siv rau hauv qhov xwm txheej ntawm -180 ~ 250 ° C. Tab sis kuj tseem muaj qhov tsis zoo xws li loj linear expansion coefficient, tsis zoo ntawm qhov ruaj khov, thiab thermal conductivity tsis zoo. Txhawm rau txhim kho nws cov kev ua tau zoo, nws tuaj yeem sau thiab ntxiv dag zog nrog cov hlau hais, fibers, graphite thiab inorganic tshuaj.

2. Graphite

Nws yog cov khoom siv zoo ntawm tus kheej lubricating, thiab vim tias nws yooj yim rau kev ua, thiab qhov ntau nws yog hauv av, qhov smoother, yog li nws yog cov khoom ntawm kev xaiv rau bearings. Txawm li cas los xij, nws cov khoom siv kho tshuab tsis zoo, thiab nws cov kev cuam tshuam tsis zoo thiab lub peev xwm thauj khoom tsis zoo, yog li nws tsuas yog tsim nyog rau lub teeb load zaus. Txhawm rau txhim kho nws cov khoom siv kho tshuab, qee cov hlau fusible nrog zoo hnav tsis kam yog feem ntau impregnated. Cov khoom siv impregnation feem ntau yog Babbitt alloy, tooj liab alloy thiab antimony alloy. 

3. Roj Hmab

Nws yog ib tug polymer ua los ntawm elastomer, uas muaj zoo elasticity thiab poob siab absorbing. Txawm li cas los xij, nws cov thermal conductivity tsis zoo, kev ua haujlwm tsis yooj yim, qhov tso cai ua haujlwm kub qis dua 65 ° C, thiab nws xav tau cov dej ntws mus rau lubricate thiab txias tsis tu ncua, yog li nws tsis tshua siv.

4. Carbide

Nws muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, kub tsis kam, thiab corrosion kuj. Yog li ntawd, cov zawv zawg bearings ua tiav nrog nws muaj qhov siab precision, ruaj khov ua haujlwm, siab hardness, zoo zog, thiab durability, tab sis lawv kim heev.

5. SiC

Nws yog ib hom tshiab ntawm cov khoom siv hluavtaws hluavtaws uas tsis yog-hlau. Lub hardness yog inferior rau cov pob zeb diamond. Nws muaj cov tshuaj zoo corrosion kuj, hnav tsis kam, kub tsis kam, siab mechanical zog, zoo self-lubricating kev ua tau zoo, siab kub creep kuj, me me kev sib txhuam, siab thermal conductivity, thiab thermal expansion coefficient. Nws tuaj yeem siv dav siv hauv roj av, metallurgy, tshuaj lom neeg kev lag luam, tshuab, aerospace thiab nuclear zog thiab lwm yam kev lag luam, feem ntau yog siv los ua cov khoom sib txhuam ntawm cov zawv zawg bearings thiab mechanical seals.