Complete Measures on How to Adjust Bearing Installation 2019 [Quick]
Problems during bearing installation
During bearing installation, do not directly hammer the bearing end face and non-stressed surface. Use a pressing block, sleeve or other installation tools to evenly stress the bearing. Do not install the bearing by transferring power through the rolling body. If the installation surface has lubricating oil, the installation will become more smoothly. If the interference is large, it's necessary to install the bearing as soon as possible after heating it up to 80~90℃ in mineral oil. And control the oil temperature less than 100℃ to prevent the hardness reduction of tempering effect and affect the size recovery.
When disassembly is difficult, you must use the disassembly tool to pull outward while carefully pouring hot oil on the inner ring. Heating causes the bearing inner ring expansion, thus making it easy to fall off.
Not all bearings require a minimum working clearance, you must select the appropriate bearing clearance according to the conditions. According to the national standard 4604-93, the rolling bearing radial clearance have five groups: group 2, group 0, group 3, group 4 and group 5. The clearance value increases from small to large, and group 0 is the standard clearance. The basic radial clearance group is suitable for general operating conditions, conventional temperature, and common interference fit.
In high temperature, high speed, low noise, low friction, and other special conditions, select the radial clearance bearing. Select small radial clearance bearing for precision spindle and spindle bearing of the machine tool.
Roller bearings can maintain a small working clearance. In addition, there is no clearance for separated bearings. Finally, the working clearance after installing the bearing is smaller than the original clearance before installation. Because the bearing has to bear a certain amount of load rotation, as well as the elastic deformation caused by bearing fit and load.
Methods of adjusting bearing installation
In order to solve the problem of seal defects of the bearing with Mosaic seal, you have to carry out two steps strictly.
Change insert seal bearing cover structure into both sides of the bearing. Adjust the installation structure of equipment bearing without direct contact with the bearing. This kind of structure seal effect is higher than the bearing itself seal from the bearing agent, which directly blocks the invasion path of granular material and ensures the cleaning inside the bearing. This structure improves the heat dissipation space of the bearing and does little damage to the fatigue resistance of the bearing.
Bearing cooling installation
Bearing the external sealing method. Although the sealing effect is good, the heat dissipation path is also blocked. So it is necessary to install the cooling parts. The cooling device can reduce the operating temperature of the lubricant. After cooling, it can dissipate heat naturally and avoid the high-temperature running of the bearing.
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