2013/2/27 23:07:07
Most large jaw crusher main bearing split plain bearings, and bearing liner is mostly made of babbitt. The technical requirements of this bearing scraping, scraping, bad or improper gap adjustment, will lead the research watts or bush-burning accident. Therefore, the main bearing damage rate is relatively high. This requires the main bearing to be replaced for repair.
1.to understand the technical standards of the spindle scraping
Spindle and bearing both even and smooth contact, but also with the gap, so that the upper part of the formation of oil under the bush and spindle outside the contact angle wedge and wedge began a gradual transition from maximum to zero watts mouth; contact angle can not be too large can not be too small; within the scope of the contact angle of the actual contact spots more finer and more uniform, the better.
2.remove the old tile
To measure the removal of old tile old bearing joint surface pad thickness, levelness and smoothness of the spindle, the old bush headspace, backlash and axial clearance.
3.the detection watt back bearing contact
Repair is replaced according to the contact situation, to select the corresponding technology.
4.the main bearing scraping
The scraping bush axis basis, the inner hole scraper research of scraping. The scraping procedure early scraped watts, then early scraping on the tile, then fine scraping across the tile, the last scraping the side of the gap and the point of deposit and oil. The bearing scraping general can be divided into rough scrape, the fine scrape and fine scraping three processes. The scraping should adopt the principle of light after the first heavy scraping heavy to stay light, scraping large stay small. Based on the specific circumstances of different parts of the scraping.