What effect does the size of the axial clearance have on the assembly of the bearing?

Jan,04.2024

Axial clearance directly affects the performance and reliability of bearings under different working conditions. This axial clearance, that is, the axial gap between the inner and outer rings, is considered a carefully regulated factor, and the proper selection of its dimensions is crucial to the function and life of the bearing.

The size of the axial clearance affects the axial preload or relaxation state of the bearing. Moderate axial preload can improve the rigidity of the bearing, making it more stable under high speed and high load conditions. In contrast, larger axial clearance places the bearing in a relaxed state and is suitable for low speed and high vibration applications. This flexibility adjustment is to adapt to the different needs for bearing performance under different working conditions.

Secondly, changes in axial clearance are also related to temperature and thermal expansion. As the internal components of the bearing gradually heat up during operation, if the axial clearance is not large enough, thermal expansion may be restricted, thus affecting the normal operation of the bearing. Therefore, the selection of a reasonable axial clearance must take into account the thermal expansion factors of the bearing at different temperatures to ensure that the bearing can operate stably at various operating temperatures.

The size of the axial clearance is also directly related to the bearing's ability to withstand axial loads. Appropriate axial clearance helps to evenly distribute axial load and ensure that abnormal stress concentration does not occur when the bearing is loaded, thus improving the life and reliability of the bearing.

By adjusting the axial clearance, the axial rigidity of the bearing can be adjusted to meet the rigidity requirements under different working conditions. This is critical to ensure axial stability under high load conditions.

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