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(1) Assembly of cylindrical bore bearings

a. Non-separable bearings (such as deep groove ball bearings, self-aligning ball bearings, spherical roller bearings, angular contact bearings, etc.) should be assembled according to the tightness of the seat ring. When the inner ring fits tightly with the journal and the outer ring fits loosely with the housing, first install the bearing on the shaft, and then install the bearing into the housing together with the shaft. When the outer ring of the bearing is in a tight fit with the housing hole, and the inner ring and the journal are loosely matched, the bearing should be pressed into the housing first; when the inner ring is tightly fitted with the shaft, the outer ring and the housing hole , The bearing should be pressed on the shaft and the housing hole at the same time.

b. Since the inner and outer rings of separable bearings (such as tapered roller bearings, cylindrical roller bearings, needle roller bearings, etc.) can be freely disengaged, the inner ring and rolling elements are mounted on the shaft together, and the outer ring is mounted on the shell. Inside the body, and then adjust the clearance between them.

If the journal size is large and the interference is large, the hot mounting method can be used to facilitate assembly, that is, the bearing is heated in oil at a temperature of 80~100~C, and then matched with the shaft at normal temperature. When the bearing is heated, it should be placed on the grid in the oil tank to prevent the bearing from contacting the bottom of the tank, which is much higher than the oil temperature, and to prevent contact with the sediment on the bottom of the tank. For small bearings, they can be hung on a hook and immersed in oil for heating. Bearings filled with lubricating grease with dust caps or sealing rings cannot be assembled by hot mounting.

(2) When the assembly interference of the tapered bore bearing is small, it can be directly installed on the tapered journal, or it can be installed on the tapered surface of the adapter sleeve or the withdrawal sleeve; for the large journal size or matching interference The large-volume and frequently disassembled tapered bore bearings are usually disassembled by hydraulic sleeves.

(3) Thrust ball bearing assembly Thrust ball bearings are divided into loose ring and tight ring. When assembling, the tight ring should be placed against the end face of the rotating part, and the loose ring should be against the end face of the stationary part, otherwise the rolling elements will lose their function. , And will accelerate the wear between mating parts.

2021-01-19 17:14:08, views: 59, Comments: 0