The main function of the bearing is to support the mechanical rotating body, reduce the friction coefficient during , and ensure its rotation accuracy. The motor bearing can be understood as being used to fix the motor shaft, so that its rotor can rotate in the circumferential direction, and at the same time control its axial and radial position and movement.
Motors with frequent start and stop and forward and reverse rotation have some special requirements for the motor winding, shaft extension, and the fixing between parts, such as the insulation level of the motor winding, the motor shaft extension is mostly conical, the stator iron core and the frame , Rotor core and shaft are fixed by long key positioning and other measures. A netizen suggested that the frequent forward and reverse rotation of the motor will affect the bearing.
Small and medium-sized motors use deep groove ball bearings and cylindrical roller bearings, which are all symmetrical structures. There is no regulation on the steering of the bearing, and there is no constraint on the assembly direction. Therefore, the forward rotation and reverse rotation will not affect the bearing, that is Bearings have no special requirements for forward and reverse rotation. However, for motors with frequent forward and reverse rotations, when the shaft of the motor is deflected, it will directly cause the bearing system to be non-concentric, which will still have a certain impact on the operation of the bearing. Therefore, ensuring the normal operation of the bearing has a direct bearing on the quality of the matching parts. relation.
From the selection analysis of the motor bearing system structure, for motors under heavy load conditions, including motors that start and stop frequently (the starting process is particularly similar to the case of heavy loads), more cylindrical roller bearings are selected, which is also the difference between the motor bearing system and the motor. instances that match the operating conditions.
But a point to be reminded here is that the installation of angular contact ball bearings involves a problem of “forward installation” and “reverse installation”, that is, the directional problem in the vertical direction. The detailed analysis will not be repeated here.
Unlike most motor product bearings, some equipment only allows one-way rotation. In this case, one-way bearings are used; one-way bearings are free to rotate in one direction and locked in the other direction. bearing. One-way bearings contain many rollers, needles, or balls, and the shape of their rolling seats allows them to roll in one direction only, and create a lot of resistance in the other direction. One-way bearings are mainly used in textile machinery, printing machinery, automobile industry, household appliances and money detectors.
Post time: Jul-04-2022