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Date:2011-10-12 11:01:18
Bearing is a major part of the machine, the machine operation is flexible, mainly depends on the bearing assembly quality of key guarantee quality of assembly should grasp the disassembly and installation of bearing method.
1. The removal of bearing
(1) sliding bearing and the removal of bush
Sliding boat side very sad arm in a thin, easy to damage and strain. Remove, the first dismantled around the import bearings fixed screw and pin. A position of the flange bearing in bearing housings, lid and separated should pay attention to remove the direction. Remove the tiles, application tongbang or stick against the steel back end of the watts, and pay attention to protect, alloy layer. Sleeve type bearings should use remove tool or pressure, and do not take a knock fiercely, lest cause deformation and damage bearing.
(2) the removal of rolling bearings
Remove the scroll in the boat was sad, should be removed before check to make sure the direction, pay attention to whether axial positioning device. Remove from the shaft bearing, stress points in bearing of the inner ring be elected; In the hole disassembled, stress points in bearing outer lane be elected, remove hard to even, in case bearing skewed.
2. The installation of the bearing
(1) sleeve type of sliding bearings installation
Installation to ensure the shaft and bearings with suitable clearances between. So that the formation of the oil film. Bearing and a hole should be proper tight degrees, in order to prevent the operation with the shaft bearing rotation. Specific requirement as follows:
(1) in the pressure should check the bearing before bearing whether meet the requirements for size defects, and wipe the surface in contact, daub lubricating oil, oil stolen goods on the way cleaned and the oil on way holes.
(2) in the body according to the location of the bearing and the size of the bearing, choose when installed in the right tools.
(3) after being on the bearing interference fitted should add the screw or pin and to check whether meet the requirements of the inner diameter, such as the distortion, it must be overhauled in general use, boring, reaming, and scraping method.
(2) of the open sliding bearing installation
(1) of the open sliding bearing usually says bush before the installation, should clean oil, the oil, the word with noodles, check boat side very sad holder and the oil on whether bush hole relative. Pay attention to remove the rust on bush, not use wax the fire, and avoid the temperature too high melting and metal, should be put in hot water or the hot oil clean up after molten.
(2) the bearings when installed, application board in bush ends, mat again will tile with tongbang gently into a watts, axle bush and the outer surface of the bearing and bearing cover to engage closely, Buddha, axle bush easily, or alloy layer falls off even rupture. To ensure the close coordination of the bearing, the separate face should be separate a little higher than bearing surface (generally 0.05 0.1 mm).
(3) the load bearing in the body, does not allow to have the axial or radial mobile, generally USES the positioning pin, convex key check mouth or steps to fixed. The assembly of bearing surfaces in requirements in 70% 75%.
(3) the installation of rolling bearings
(1) before installing needs will roll bearing ways, the oil when word clean, should be lubricated bearing should daub lubricating oil.
(2) the installation will not fall into the dirt bearing circles, to avoid the damage and rolling roller surface.
(3) according to the requirements of the internal and external circle with check bearing over surplus quantity standards.
(4) use a special tool should be installed in the face, with a tight circles on the seat of the compression strength to even, in case, bearing skewed.
(5) when installation interference larger bearings, shall not violent, should use press or knock the method of heating assembly.
(6) bearing after installation, should be examined for end face and shaft or turrets shoulder bearing surface, whether turning against is flexible, without card lag phenomenon.