Menene sharewa kuma ta yaya ake auna sharewa don bearings masu birgima?

Tsarin da ke riƙe da bearing mai birgima shine matsakaicin adadin ayyukan da ke riƙe da zobe ɗaya a wurinsa ɗayan kuma a cikin alkiblar radial ko axial. Matsakaicin aiki a alkiblar radial ana kiransa radial clearance, kuma matsakaicin aiki a alkiblar axial ana kiransa clearance axial. Gabaɗaya, girman radial clearance, girman axial clearance, da akasin haka. Dangane da yanayin bearing, ana iya raba clearance zuwa nau'i uku masu zuwa:

I. Asali izinin

Ba tare da izini ba kafin a shigar da kayan ɗaukar kaya. Ana tantance ainihin izinin ta hanyar sarrafawa da haɗawar masana'anta.

2. Shigar da sharewa

Haka kuma an san shi da fit clearance, shine clearance lokacin da aka sanya bearing da shaft da bearing housing amma ba su yi aiki ba tukuna. Clearancen hawa ya fi ƙanƙanta fiye da clearancen asali saboda tsangwama, ko dai ƙara zoben ciki, rage zoben waje, ko duka biyun.

3. Tabbatar da aiki

Idan bearing ɗin yana cikin yanayin aiki, zafin zoben ciki yana ƙaruwa zuwa matsakaicin kuma faɗaɗawar zafi zuwa matsakaicin, don haka share bearing ɗin yana raguwa. A lokaci guda, saboda tasirin kaya, lalacewar roba tana faruwa a wurin hulɗa tsakanin jikin birgima da hanyar tsere, wanda ke ƙara share bearing ɗin. Ko share bearing ɗin aiki ya fi girma ko ƙarami fiye da share bearing ɗin ya dogara ne akan haɗin tasirin waɗannan abubuwan biyu.

Wasu bearings masu birgima ba za a iya gyara su ko wargaza su ba. Suna samuwa a cikin samfura shida, daga 0000 zuwa 5000; Akwai nau'in 6000 (bearings masu kusurwa) da nau'in 1000, nau'in 2000 da nau'in 3000 tare da ramukan mazugi a cikin zoben ciki. Bayanin hawa na waɗannan nau'ikan bearings masu birgima, bayan daidaitawa, zai zama ƙarami fiye da izinin asali. Bugu da ƙari, ana iya cire wasu bearings, kuma ana iya daidaita izinin. Akwai nau'ikan bearings guda uku: Nau'in 7000 (bearings masu tapered roller bearing), nau'in 8000 (bearings masu thrust ball bearing) da nau'in 9000 (bearings masu thrust roller bearing). Babu izinin asali a cikin waɗannan nau'ikan bearings guda uku. Ga bearings masu birgima nau'in 6000 da nau'in 7000, an rage izinin radial kuma an rage izinin axial, kuma akasin haka, yayin da ga bearings masu birgima nau'in 8000 da nau'in 9000, izinin axial kawai yana da mahimmanci a aikace.

Daidaitaccen izinin hawa yana sauƙaƙa aikin birgima na yau da kullun. Ɓacewar ta yi ƙanƙanta, zafin birgima yana ƙaruwa, ba zai iya aiki yadda ya kamata ba, don haka jikin birgima ya makale; Ɓacewar da ta wuce gona da iri, girgizar kayan aiki, ƙarar birgima.

Hanyar duba radial clearance ita ce kamar haka:

I. Hanyar azanci

1. Idan aka yi amfani da na'urar juyawa da hannu, na'urar ya kamata ta kasance mai santsi da sassauƙa ba tare da mannewa da kuma tauri ba.

2. A girgiza zoben waje na bearing da hannu. Ko da radial clearance ɗin 0.01mm ne kawai, motsi na axial na saman bearing shine 0.10-0.15mm. Ana amfani da wannan hanyar don bearings na centripetal ball bearings jere ɗaya.

Hanyar aunawa

1. Duba kuma tabbatar da matsakaicin matsayin nauyin beyar birgima da na'urar jifa, saka na'urar jifa tsakanin jikin birgima 180° da zoben waje (na ciki), kuma kauri mai dacewa na na'urar jifa shine radial clearance na beyar. Ana amfani da wannan hanyar sosai a cikin beyar birgima masu daidaitawa kai tsaye da beyar birgima masu silinda.

2, duba da alamar bugun kira, da farko saita alamar bugun kira zuwa sifili, sannan ka ɗaga zoben waje mai birgima, karatun alamar bugun kira shine radial clearance na bearing.

Hanyar dubawa ta hanyar sharewar axial ita ce kamar haka:

1. Hanyar azanci

Duba yankin da ke kewaye da belin da yatsanka. Ya kamata a yi amfani da wannan hanyar lokacin da ƙarshen shaft ya bayyana. Idan ƙarshen shaft ya rufe ko kuma ba za a iya duba shi da yatsunsu ba saboda wasu dalilai, duba ko shaft ɗin yana da sassauƙa yayin juyawa.

2. Hanyar aunawa

(1) Duba da abin jifa. Hanyar aiki iri ɗaya ce da ta duba radial clearance tare da abin jifa, amma ya kamata a yi amfani da axial clearance.

C = lambda/sin (beta 2)

Inda c -- sharewar axial, mm;

-- Kauri mai aunawa, mm;

-- Kusurwar mazugi mai siffar bearing, (°).

(2) Duba da alamar bugun kira. Lokacin da aka yi amfani da sandar murhu don tura sandar motsi zuwa matsayi biyu masu tsauri, bambancin karatun alamar murhu shine sharewar axial na bearing. Duk da haka, ƙarfin da aka yi amfani da shi a sandar murhu bai kamata ya yi girma ba, in ba haka ba harsashin zai sami nakasar roba, koda kuwa nakasar ƙarama ce, zai shafi daidaiton sharewar axial da aka auna.