The clearance of the crossed tapered roller bearing refers to the gap between the inner roller of the bearing and the raceway, which is set to ensure the normal operation of the bearing. The existence of clearance can compensate to a certain extent the deformation and thermal expansion of the bearing caused by factors such as assembly errors, thermal expansion and contraction of materials, etc., so as to ensure the normal operation and life of the bearing.
For crossed tapered roller bearings, the clearance is mainly divided into two types: radial clearance and axial clearance. Radial clearance refers to the gap between the roller and the raceway in the radial direction, which is used to accommodate the deformation of the bearing in the radial direction. Axial clearance refers to the gap between the roller and the raceway in the axial direction, which is used to accommodate the deformation and thermal expansion of the bearing in the axial direction.
The size of the clearance will affect the working performance and stiffness of the bearing. Too small clearance may cause the bearing to be too tight, increase rolling friction and wear, and reduce the life of the bearing. Excessive clearance may cause the bearing to loosen, affecting the accuracy and stability of the bearing.
Therefore, when designing and installing crossed tapered roller bearings, it is necessary to reasonably select the appropriate clearance according to the specific working conditions and requirements. Generally speaking, the size of the clearance should be calculated and determined according to the type, size, load, speed and other factors of the bearing.
The selection principle of clearance mainly considers the following aspects:
1. Bearing load
The clearance directly affects the stiffness and load carrying capacity of the bearing. Generally speaking, a larger clearance can provide a higher load-bearing capacity, which is suitable for bearing larger radial and axial loads. Smaller clearance provides higher rigidity, suitable for high-speed operation and higher positioning accuracy.
2. Working temperature
The selection of the clearance should also consider the temperature change of the bearing during the working process. Due to the influence of thermal expansion and contraction, the bearing will have greater thermal expansion at high temperature, so it is necessary to choose a larger clearance to compensate for the deformation caused by thermal expansion.
3. Bearing precision
The clearance of the bearing is closely related to the precision of the bearing. Generally speaking, bearings with higher precision require smaller clearances to ensure higher positioning accuracy and rigidity.
To sum up, when selecting the clearance of crossed tapered roller bearings, factors such as load, working temperature and precision should be considered comprehensively. According to the specific application requirements and working conditions, the appropriate clearance can be selected to meet the performance requirements of the bearing. In practical applications, you can usually refer to the technical information and suggestions provided by the bearing manufacturer, or consult the opinions of professional and technical personnel.
