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Common problems of rolling bearings and their causes (1)
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.2) Bearing operation has a strange sound,
.3) bearing oscillations,
.4) the inner race is detached and cracked,
.5) The outer race is detached and cracked,
.6) bearing raceway and rollover indentation.
2. Analysis of the cause of the disease. 1) Check before installation is not careful; the bearing should be removed before installation and carefully look at the bearing inside the seat, roll and cage; can there be rust, burrs, bumps and cracks, check the bearing Whether the gap is suitable; whether the transformation can be light and self-sufficient; whether there is a sudden appearance, together with the scale, roundness and cylindricity of the shaft diameter and the bearing seat hole, and whether the appearance can be burred or uneven. Bearing housing; between the bearing surface of the bearing cap and the bearing base and the outer circular surface of the outer race; should leave a gap of 0. 1mm ~ 0. 25mm; to prevent the "bucket" on the two sides of the outer seat The appearance of the void caused by the reduction.
.2) Improper installation. Improper installation will incur the bearing's various ways of dealing with the above; and the following conditions:
A. The cooperation between the inner hole and the shaft of the bearing is selected by the base hole system; the cooperation between the outer circle of the bearing and the bearing housing hole is made by the base shaft system. Centrifugal pumps, centrifuges, reducers, motors and centrifugal type, which are generally operated under normal load conditions. The shaft of the compressor and the inner race of the bearing; use j5; js5; js6; k5; k6; m6 cooperation; the bearing seat hole and the bearing outer race are selected j6; j7 cooperation. Rotating race (the inner race of most bearings) It is a rotating race; the outer race is not a rotating race; the other part is the opposite; generally, the interference cooperation is used; under the load effect, the race can be prevented from rolling and sliding on the cooperative appearance of the shaft diameter and the bearing housing hole under the load effect. .
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