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What is the difference between the two structures of self-aligning ball bearings?

wallpapers Tech 2021-04-07
What is a self-aligning ball bearing?
The bearing is equipped with spherical balls between the inner ring box and the outer ring of the spherical surface of the two raceways. The outer diameter of the self-aligning function bearing and the inner diameter of the bearing seat is spherical, and there is an active self-aligning function between the two, which can compensate for the misalignment of the axis caused by the device error and the deformation of the device bottom surface. The material of the cage includes steel plates, synthetic resin, etc. Self-aligning ball bearings have two structures: cylindrical bore and tapered bore, and the cage is made of steel plate, synthetic resin, etc. Its characteristic is that the outer ring raceway is spherical, with self-alignment, which can compensate for the errors caused by misalignment and shaft deflection, but the relative inclination of the inner and outer rings should not exceed 3 degrees.
 
Two structures of self-aligning ball bearing
Cylindrical hole
1. Since it has two rows of steel balls and a curved raceway in the outer ring, self-aligning ball bearings can be self-aligned.
2. It can accept the point of view error between the shaft and the bearing seat. It is suitable for the working conditions that simply present the shaft deflection and misalignment caused by the misalignment of the shaft center.
3. Friction is the lowest among all rolling bearings.
4. Even in the case of high speed; still only has a small temperature rise.
Conical hole
1. Tapered hole self-aligning ball bearing has the characteristics of cylindrical hole self-aligning ball bearing (but the inner hole is a tapered hole (conventional taper 1:12).
2. The device is installed on the tapered shaft to fine-tune the bearing clearance. This type of bearing is mostly used on double-supported shafts with large twists under load.
3. And the two supporting seat holes can not ensure strict concentric parts. It is mainly used to accept the radial load, but also accept a small amount of axial load.
4. Generally, the pure axial load cannot be accepted. The versatility of this type of bearing is second only to deep groove ball bearings.
5. Its limit speed is lower than that of the same standard deep groove ball bearing, but its load capacity is higher than that of a deep groove ball bearing.

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