FAG flat needle roller bearing clearance maintenance performance characteristics
If the FAG bearing can be used correctly without the wrong choice, it can be used for a long time before the service life of the flat needle roller bearing. On the other hand, there is an accidental early damage, and the early damage that cannot be used is used as the The causes of early damage are not enough to consider the use of lubrication, and there are also foreign matter intrusion, the error of bearing assembly and the deflection of the shaft are large, and the research on the shaft and the bearing housing is insufficient. It can be said that these reasons overlap each other.
A comparative study using various mechanical design lifes and various durable bearing limits, while determining the FAG bearing size. In the selection of FAG bearings, flat needle bearings tend to be considered, the grease life in aging, the fatigue life of the grease, wear resistance, and low noise, also need to be fully studied.
When the FAG bearing ring rotates the load, if the clearance fit is used, the mating surface of the ferrule will be creeping during the rotation of the flat needle bearing, which is prone to fretting wear. , cracks and other damage. Therefore, the fit of the ferrule bearing the rotating load and the journal or seat hole of the mechanical component should be an interference fit.
In the mechanical bearing part, the planar needle bearing should be positioned and fixed in different directions in the radial, axial and circumferential (tangential) directions. In general, the axial fixation of the FAG bearing is achieved by axial closure or partial radial fit. The bearings on the free side of the mechanism support are often not axially fixed to compensate for the axial installation of the mechanism system or Dimensional changes during thermal expansion and contraction.
1. High support precision, stable and reliable operation.
2. It can be operated in high temperature, deep cold and vacuum environment.
3. The structure is complex, the requirements are harsh, and there is magnetic interference to the environment, but there is no other pollution.
4. Low friction, low power consumption, and ultra-high speed operation.
5. DC-excited bearings can only be active (active).
6. Permanent magnet bearings can only be passive (passive), while passive bearings are not stable in all three directions. At least one direction should be active.
7. Repulsive magnetic bearings, due to the low magnetic utilization rate, the structure is more attractive than the suction type, and is rarely used.
8. Pure electromagnet type bearings can only be 5 degree of freedom controlled bearings, which are relatively large in size, quality and power consumption.
A comparative study using various mechanical design lifes and various durable bearing limits, while determining the FAG bearing size. In the selection of FAG bearings, flat needle bearings tend to be considered, the grease life in aging, the fatigue life of the grease, wear resistance, and low noise, also need to be fully studied.
When the FAG bearing ring rotates the load, if the clearance fit is used, the mating surface of the ferrule will be creeping during the rotation of the flat needle bearing, which is prone to fretting wear. , cracks and other damage. Therefore, the fit of the ferrule bearing the rotating load and the journal or seat hole of the mechanical component should be an interference fit.
In the mechanical bearing part, the planar needle bearing should be positioned and fixed in different directions in the radial, axial and circumferential (tangential) directions. In general, the axial fixation of the FAG bearing is achieved by axial closure or partial radial fit. The bearings on the free side of the mechanism support are often not axially fixed to compensate for the axial installation of the mechanism system or Dimensional changes during thermal expansion and contraction.
1. High support precision, stable and reliable operation.
2. It can be operated in high temperature, deep cold and vacuum environment.
3. The structure is complex, the requirements are harsh, and there is magnetic interference to the environment, but there is no other pollution.
4. Low friction, low power consumption, and ultra-high speed operation.
5. DC-excited bearings can only be active (active).
6. Permanent magnet bearings can only be passive (passive), while passive bearings are not stable in all three directions. At least one direction should be active.
7. Repulsive magnetic bearings, due to the low magnetic utilization rate, the structure is more attractive than the suction type, and is rarely used.
8. Pure electromagnet type bearings can only be 5 degree of freedom controlled bearings, which are relatively large in size, quality and power consumption.
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