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Detailed description of the device method of the motor bearing
Source: China Bearing Network Time: 2014-09-28
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2. View the dimensions and finishing conditions of the associated parts. 3. 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:
1) Pressing into the inner ring of the cooperative bearing and the shaft to cooperate tightly; when the outer ring and the bearing housing hole are loosely engaged; the bearing can be press-fitted on the shaft first; then the shaft is loaded into the bearing housing hole together with the bearing ; press-fit on the end face of the bearing inner ring; pad a device made of soft metal material (copper or mild steel).
The outer ring of the bearing is tightly cooperated with the hole of the bearing seat; when the inner ring and the shaft are loosely engaged; the bearing can be first pressed into the hole of the bearing seat; at this time, the outer diameter of the casing of the device should be slightly smaller than the diameter of the seat hole.
If the bearing ring and the shaft and the seat hole are tightly cooperated; 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 tightly close the end faces of the inner ring and the outer ring of the bearing.
2) Heating cooperation through heated bearings or bearing housings; using thermal expansion to transform tight cooperation into loose cooperation device method. It is a common and labor-saving device method. This method is suitable for devices with large interference bearing; hot loading Put the bearing or the ferrule of the separate bearing into the fuel tank and heat it evenly at 80-100 °C; then remove it from the oil and load it on the shaft; to avoid the inner ring end face and the shoulder joint not tight after cooling; bearing cooling After the axial fastening can be carried out. When the outer ring of the bearing is tightly cooperated with the bearing seat made of light metal; the hot-filling method of the heated bearing seat is adopted; the cooperating surface can be prevented from being scratched.
When heating the motor bearing with the fuel tank; there should be a grid at a certain distance from the bottom of the box; perhaps the bearing should be hung with a hook; the bearing should not be placed on the bottom of the box; to prevent the sinking of impurities into the bearing or uneven heating; there must be a thermometer in the tank Strictly control the oil temperature must not exceed 100 ° C; to avoid the tempering effect; the hardness of the ferrule is reduced.
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