deck crane bearing Bearing clearance selection technique

Clearance is an important factor in rolling bearing can work normally, divided into the axial clearance and the radial clearance. Select the appropriate clearance, can make the load in the bearing rolling body between the reasonable distribution; can limit axis (or shell) of the axial and radial deck crane bearing‍ displacement, ensure the rotating precision of shaft; the bearing work at a prescribed temperature; reduce the noise and vibration, to improve the bearing life. Therefore. In the selection of bearings, bearing clearance, must choose the appropriate.

Selection of bearing clearance, should consider the following aspects:

1, the bearing working conditions, angular contact bearing‍ such as load, temperature, speed etc.;

2, on the use of performance requirements (bearing rotation accuracy, friction torque, vibration, noise);

3, the bearing and the shaft and housing bore is in interference fit with the lead to reduction of bearing clearance;

4, when the inner and outer rings of bearing, the temperature difference caused reduction of bearing clearance;

5, because the expansion coefficient of shaft and housing materials of different, resulting in the decrease or increase of bearing clearance.

6, according to experience, the most suitable for ball bearing clearance work to nearly zero; roller bearing should keep a small amount of clearance. At the request of supporting rigid good parts, Thin section bearings‍ bearing preload has certain value. Here is particularly pointed out that, the so-called clearance refers to the bearing clearance, in the actual operating condition. There is also a play called the original clearance, refers to the bearing without clearance. The original clearance than installation clearance. We choose to play, mainly is to choose appropriate clearance.