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Bearing device common sense (1)
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1. Clear the bearing and related parts to the grease-smooth bearing and the double-sided oil seal or dust cover; the seal ring bearing device does not need to be removed.
Second, to view the dimensions and finishing conditions of the associated parts. III. Device The bearing device should be based on the bearing layout; the size of the scale and the cooperative nature of the bearing components; the pressure should be added directly to the end face of the ferrule; Body transfer pressure; bearing devices usually use the following methods:
a. Pressing the inner ring of the cooperative bearing and the shaft to make a tight cooperation; when the outer ring and the bearing housing hole are loosely engaged; the bearing can be first pressed on the shaft by the press; then the shaft is loaded into the bearing housing hole together with the bearing; Installed on the end face of the inner ring of the bearing; pad a device casing made of soft metal material (copper or mild steel); the inner diameter of the casing of the device should be slightly larger than the diameter of the journal; the diameter of the outer diameter should be slightly smaller than the inner ring of the bearing庋乖诒 庋乖诒 3 苌. The outer ring of the bearing and the bearing housing hole tightly cooperate; when the inner ring and the shaft are loosely cooperative; the bearing can be pressed into the bearing housing hole first; Less than the diameter of the seat hole. If the bearing ring is tightly engaged with the shaft and the seat hole; the inner ring and the outer ring of the device should be pressed together into the shaft and the seat hole; the layout of the device bushing should be able to hold the inner ring of the bearing together and The end face of the outer ring.
b. Heating cooperation through heated bearings or housings; using thermal expansion to transform tight cooperation into a loosely cooperating device approach. It is a common and labor-saving device approach. This method is suitable for devices with large interference bearings; The bearing or the ferrule of the separate bearing is placed in the fuel tank and heated evenly at 80-100 ° C; then it is taken out from the oil and quickly loaded onto the shaft; in order to avoid the cooling, the end face of the inner ring and the shoulder are not tight; after the bearing is cooled, Then the axial fastening is carried out. When the outer ring of the bearing is tightly cooperated with the bearing seat made of light metal; the hot-packing method of the heated bearing seat is adopted; the cooperating surface can be prevented from being scratched. When the bearing is heated by the oil tank; at a certain interval from the bottom of the box There should be a grid; perhaps the bearing should be hung with a hook; the bearing should not be placed on the bottom of the box; to prevent sinking impurities from entering the bearing or uneven heating; there must be a thermometer in the tank; strictly control the oil temperature should not exceed 100 °C; to avoid attacks Tempering effect; the hardness of the ferrule is reduced.
c. The tapered bore bearing of the tapered bore bearing can be mounted directly on the tapered journal; or the tapered surface of the adapter sleeve and the withdrawal sleeve; the degree of tightness of the cooperation can be measured by the reduction of the radial clearance of the bearing; Therefore, the radial clearance of the bearing should be measured before the device; during the installation process, the clearance should be measured to reach the required clearance reduction; the lock nut device is usually used in the device; the heating device can also be used.
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