Rolling bearing installation basic knowledge
Critical to the installation of bearings, bearing installation is good or not, will affect the accuracy, bearing life and performance. , The installation of the bearing, in accordance with the operating standards includes the following items, including the bearing installation.
1 cleaning bearings and related parts. Seal or dust cover, has been greased bearings and bilateral ring of the bearing installation without washing.
2, check the size of the relevant parts and finishing.
3, the installation method
Bearing installation in accordance with the nature of the bearing structure, size, and bearing components, pressure should be added to the ferrule end face of a tight fit, and shall not transmit pressure of the rolling element bearings to install and generally use the following methods:
A press-fit
Bearing inner ring and the shaft is a tight fit, the outer ring and the bearing hole is loose with the available presses will be bearing the first pressure in the shaft, then the axis together with the bearing with load bearing hole. Press-fit in the bearing inner side surface of the pad assembly casing of a soft metal material of copper or mild steel
Assembly casing diameter should be slightly larger than the journal diameter, outside diameter slightly smaller than the bearing inner ring ribs, in order to avoid pressure in the cage. The bearing outer ring and the bearing hole for the tight fit, the inner ring and the shaft is loose with the bearing first pressed into the bearing hole, this time the assembly casing diameter should be slightly smaller than the diameter of the bore.
If the bearing ring and shaft housing bore are a tight fit when installing the inner and outer rings at the same time pressed into the shaft and housing bore, the assembly structure of the casing should be at the same time pressed the bearing inner and outer face
B, heated fit
By heating bearings or bearing housing, the use of thermal expansion will be a tight fit to change the installation method for a loose fit. It’s a common and labor-saving method of installation. This method is suitable for the large amount of interference the installation of bearings. Bearings separable type bearing rings into the hot charging uniform heating tank 80 to 100 ° C, and then removed from the oil onto the shaft as soon as possible after cooling, to prevent the inner end and the shaft shoulder fit is not tight, bearing cooling axial fastening. Tight fit of the bearing outer ring and light metal bearing heating bearing thermal loading can be avoided with the surface by abrasion.
Tank heating bearings from the bottom of a certain distance at the application of network gate, or use the hook hanging bearings, bearings can not be put on the bottom to prevent the precipitation of impurities entering the bearing or uneven heating of the fuel tank must have a thermometer, strictly control the oil temperature must not exceed 100 ° C, to prevent back effect, reduce the hardness of the ferrule.



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