One of the advantages of tapered roller bearings - smaller installation space

2023/05/05 15:26

The inner and outer rings of tapered roller bearings have tapered raceways, and the rolling elements are also tapered, which is a separable bearing. The main structural forms are divided according to the number of rolling rows: single-row tapered roller bearings, double-row tapered roller bearings, and four-row tapered roller bearings.

According to the size of the contact angle:

Small cone angle (9°<a≤25°)

Large cone angle (> 25°) points.

The axial load-carrying capacity of tapered roller bearings depends on the contact angle a, that is, the raceway angle of the outer ring. The larger the contact angle a, the greater the axial load-carrying capacity. The size of the angle is represented by the calculation coefficient e, the larger the value of e, the larger the contact angle.

Generally, the shaft is not allowed to be inclined relative to the shell hole. If there is any inclination, the maximum inclination shall not exceed 2". If it is used as a rolling bearing of a rolling mill due to the requirements of the production process, it will inevitably be subjected to bending force and the inclination of the axis exceeds 2". , The rollers and raceways of the bearing will generate additional stress, which will increase the load on the bearing and shorten the service life of the bearing. Therefore, the rollers of DMD tapered roller bearings have a modified contact shape with the raceway, especially the four-row tapered roller bearings for rolling mills. In addition to the modified contact shape, the clearance of each row and the contact between the inner ring and the roll neck The points are specially designed, which can effectively solve the problem of shortened bearing life caused by bending force. Double-row tapered roller TDI structure (370000 series) has 2 outer rings, an integral inner ring, and a spacer in the middle of the outer ring. The clearance is adjusted by the thickness of the spacer, and the thickness of the spacer can also be used to adjust the double-row cone Pre-interference for roller bearings. Its performance is similar to the face-to-face installation performance of two single-row tapered roller bearings. Compared with the outward double-row tapered roller-bearing TDO structure (350000 series), it has a smaller installation space, but its rigidity is slightly worse. Compared with Not sensitive to neutral.

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