First, the bearing of the demolition
1 sliding bearings and bearing disassembly
The arm of the sliding bearing is thin, easy to damage and strain. When removing, first remove the fixed screw and pin around the bearing. Bearing with the positioning flange, the bearing cover and the bearing seat should pay attention to the direction of disassembly after separation. Remove tiles, steel backing copper or stick to the end bearing application, and pay attention to protect the alloy layer. Sleeve type bearing should use the removal tool out or press out, do not knock fiercely, so as to avoid the bearing deformation and damage.
2 rolling bearing removal
Before dismantling the rolling bearing, check to determine the direction of removal, pay attention to whether the axial positioning device. Remove the bearing from the shaft by the point to be elected in the inner ring of the bearing; from the hole to remove the stress points to be elected in the outer ring of the bearing, split when unloading force should be uniform, to prevent the bearings askew.
Two, bearing the installation
1 sleeve type sliding bearing installation
Installation must ensure that there is a proper clearance between the shaft and the bearing to facilitate the formation of the lubricant film. The bearing seat hole and Yingguang proper tightness, to prevent operation with the rotation of the shaft bearing. Specific requirements are as follows:
One in front of pressure should check the bearing and the size of each part is whether it meets the requirements, defects, and clean the contact surface dirt, grease, oil cleaned and alignment on the body of the oil passage hole.
Two according to the bearing in the body of the position and bearing size, in the installation of the appropriate tools.
3 bearing pressing, to over fit should be added to the fixed screws or pins, and to check the diameter is in accordance with the requirements, such as deformation occurs, it must be trimmed, one like the boring, reaming and the scraping method.
2 the installation of open sliding bearing
One of the open sliding bearing usually known as bearing, before installation should be cleaning oil path, oil tank, all mating surfaces, check the bearing seat and bearing oil hole is relative. Attention to remove the anti rust wax bearing member shall not be burned with fire, so as to avoid the high temperature molten metal should be put in the hot melting after clean.
Bearing installation, the application of wood pad on the end surface of the bearing, and then copper w gently beating the bearing seat, bearing outer surface and a bearing seat and a bearing cover joint to tightly, otherwise bearing easy deformation, or alloy layer rupture or even fall off. To work closely with guaranteed bearing. The bearing surface should be separated apart a little higher than the surface (generally 0.05 ~ 0.1mm).
3 bearing load in the body, does not allow axial or radial movement, one like the locating pins and the convex key check mouth or steps to fix. Assembly contact surface bearing requirements in 70% ~ 75%.
3 rolling bearing installation
Before the installation of the bearing must be rolled, shaft hole of the oil road clean, lubrication of the bearings should be applied to the lubrication oil.
Two installation can not be dirt into the bearing ring, so as to avoid damage to the rolling body and rolling surface.
According to the requirements of the internal and external ring to check the amount of interference is consistent with the standard.
Four using special tool mounting pressure should be in the seat with the face tight, force should be uniform, to prevent bearing skew.
Wudang interference the larger bearings, not strike, should adopt methods of press or heating assembly.
The bearing after installation should check the end and shaft or a shoulder supporting surface is tightly, rotation is flexible, without card hysteresis phenomenon.