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Loading and unloading process of cylindrical bore radial bearing
Source: China Bearing Network Time: 2013-09-19
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1. Generally, the inner and outer rings are inseparable from the radial bearing; the inner ring and the shaft are often tightly cooperative, and the outer ring and the seat hole are loosely cooperative. At this moment, the bearing can be pressed on the shaft first; then the bearing is coupled with the shaft. It is installed together in the bearing housing hole. The device sleeve used for press fitting is made of soft metal; for example, copper or mild steel. The inner diameter of the sleeve is slightly larger than the shaft diameter; the outer diameter is slightly smaller than the inner ring of the bearing. When installed together in the shaft and the seat hole; a pressure plate is added between the sleeve and the bearing end face. The hole diameter is slightly larger than the shaft diameter; the outer diameter is slightly smaller than the outer diameter of the bearing. The function is to prevent the outer ring of the bearing from flexing in the seat hole. Or stuck. The pressure exerted on the sleeve can be mechanical or hydraulic. However, it is absolutely impossible to directly hammer the end face of the ferrule. Since the ferrule is a hardened thin-walled part; hammering is prone to external cracks.
2. The force required for the interference ferrule of the heating device is related to the bearing scale and the size of the cooperative interference. For medium and large bearings with large interference, the heating device is often used. The bearing is placed before the hot loading. The oil tank is evenly heated to 80 ° C ~ 100 ° C; then removed from the oil and mounted on the shaft. Bearings should not be placed on the bottom of the box when heating; to prevent deposition of impurities into the bearing. Should be strictly controlled oil temperature should not exceed 100 ° C. According to the bearing Bulk size can also choose other electric heating methods; such as induction heaters, electric heating plates and electric furnaces.
3. Disassemble and disassemble the inseparable bearing whose inner ring is tightly engaged with the shaft and the outer ring and the seat hole are loosely engaged; first remove the shaft and the bearing from the bearing housing hole; then remove the bearing from the shaft. When the inner and outer rings can be divided into bearings; first remove the shaft together with the inner ring; then remove the inner ring from the shaft, and the outer ring is removed from the bearing housing hole. The bearing is removed from the shaft or the inner ring of the bearing is on the shaft. Remove the available press. It can also be screwed. When the outer ring cooperates tightly in the seat hole; the outer ring can be pressed out by pressure tissue.
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