Large jaw crusher how to change bearings

We must first bearing, journal , and lubricant oil collector piping clean . Then the main bearing, connecting rod , etc. assembled. Equipment belt when assembled . It should be

slightly higher than normal operation loose a little . Test , first start pumps, oil and make a little when compared with the normal operation

Larger. If the testing process did not show significantly increased and the current oil temperature significantly increased the phenomenon , it shows successful repair , the

equipment can be put into normal use

Keywords: crushing equipment main bearing

Bearing lined mostly by Babbit made ​​large jaw crusher main bearing mostly used off-type sliding bearings. This bearing scraping the higher technical requirements , poor or

scraping gap adjustment improperly research watts or Burnt accidents. Summed up a good scraping for tile

Research and gap adjustment methods , are presented below for your reference .

   An old tile removal should be done

   A measure bearing joints watt mouth old gasket thickness.

   2 measuring spindle levelness .

Whether there is rust , bumps and other defects, three double-check whether the spindle is smooth. If any should try to eliminate .

   4 measuring headspace old bush , and the axial clearance backlash .

   2 detection Watt back with the contact between the bearing seat

Required scraping the tile back good, according to "JB/T5000.10-1998 heavy machinery assembly general technical conditions " requirement . To reach the technical requirements .

Otherwise, the equipment operation between the bearing and the bearing prone reverse slip or turn . To prevent this phenomenon, a

Are used as pins, sleeve positioning mode , as described herein is a locating pin main bearing .

   3 bearing scraping the technical requirements of a

Spindle scraping should meet the following specifications. According to "JB/T5000.10-1998 heavy machinery assembly general technical conditions " in the requirements.

But also with a certain gap , a spindle and bearing both even and smooth touch . The upper and lower spindle bearing and the contact angle formed at a portion other than the oil

wedge and the wedge from tile mouth began a crusher manufacturer gradual transition from maximum to zero .

Bearing pressure will increase , two contact angle is not too large nor too small. Contact angle is too small. Serious cause bush produces large deformation , accelerated wear

and shorten life ; contact angle is too large , it will affect the film formation , destruction of lubrication. Therefore, does not affect the bearing pressure

The conditions set , the smaller the contact angle the better .

The more detailed, the more uniform the better. 3 within the contact angle the more actual contact spots .

   4 main bearing scraping

Both on the research carried out after the use of bore scraper scraping . Scraping the beginning of the sequence is to first scraped tile, scraping shaft bearing should be the

basis . Beginning again scraping tile, then fine scraping the entire tile, scraping side clearance and final point of the oil . Bush can generally be divided into rough scraping

scraping . Scraping and scraping three fine finishing process .

Scraping should be used to take the first re-light , scraping heavy to stay light , scratch big to stay small principle. Scraping bush when only the contact point , the contact

angle meet the technical requirements, but also to make the top . Side clearance to achieve the specified value.

Fine scraping an upper and lower watt thick.

Then coated on the spindle display agents ( such as red lead powder , red Qian oil ) mounted on the spindle bearings, the first of two under the tile installed in the bearing

housing . Positive and negative direction of rotation to two or three times , and then remove the spindle , bearing colored according to the distribution point for rough

scraping . Rough scraping order

Segment can be positive rake angle scraping . Hand can head a few times heavier , multi- scrape some metal in order to accelerate the progress of scraping . When the contact

area of ​​50% . These fine fine scraping scraping scraping stage can be a small rake angle , the knife should be bearing centerline trace a 45 ° angle , scraping can not use

excessive force , anti-

Knife ended traces generated ripples. Scraping knife to trace around the cross , until the contact angle of contact spots within the uniform clouds , horizontal spindle error in

0.2mm / m far between . On tile thickness scraping methods and requirements under the tile of coarse and fine scraping method requires basically the same. The difference of the

Tile placed on top of the spindle on the research carried out .

   Two upper and lower watt fine scraping

Contact pattern is still large, the upper and lower watts through thick and thin after scraping . Needed further refinements . First, the upper and lower joints by adding tile

tile mouth gasket, the spindle , the tile locating pin installed, tighten the screws , so that the direction of rotation of the spindle in the normal running laps , and then

removed on

Tile , hanging spindle go for lapping work . Scraping , it is best to use negative rake angle scraping until the contact surface of the contact pattern meets the technical

requirements so far

   3 scraping side clearance and save oil spots

Should be kept scraping side clearance and oil spots . Scraping side of the gap , the ends should be set aside part of the cone crusher, to prevent the outflow of oil from the

tile sides , thus ensuring bearing lubrication. W contacts between local and non- contact portion , should make a gradual transition ; not have clear boundaries. Then the shaft

Watt arc contact point scraping of the oil , the oil remaining in point is used to store oil storage oil spots can be round or flat , depth is generally 0.30.5mm, fine scraping

is completed . Area of ​​1530mm2, should not exceed the total area of the oil scraping the contact point on the arc , save points are used to store lubricant oil

The existence of oil spots can be round or flat , depth is generally 0.30.5mm area of ​​1530mm2, should not exceed a total area of ​​contact with the arc of 1/5.