The inner and outer rings of tapered roller bearings are tapered raceways, and the rolling elements are also tapered, which are separable bearings. 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, there are: small cone angle (9°25°). The axial load carrying capacity of tapered roller bearings depends on the contact angle a, which is the raceway angle of the outer ring. The larger the contact angle a, the greater the axial load carrying capacity. 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 housing hole. When rolling bearings, it is unavoidable to be subjected to bending force and the inclination of the axis exceeds 2', extra stress will be generated on the rollers and raceways of the bearing, which will increase the load of the bearing and shorten the service life of the bearing. Therefore, the DMD tapered roller bearing has a modified contact shape between the roller and the raceway, especially the four-row tapered roller bearing for rolling mills. In addition to the modified contact shape, the clearance of each row and the inner ring are in contact with the roll neck. All points are specially designed, which can effectively solve the problem of shortened bearing life due to bending force. Double row tapered roller TDI structure (370000 series) 2 outer rings, integral inner ring, spacer ring in the outer ring, the clearance is adjusted by the thickness of the spacer ring, and the thickness of the spacer ring can also be used to adjust the double-row taper Pre-interference of roller bearings. Its performance is similar to the face-to-face installation performance of two single-row tapered roller bearings. Compared with the outward-facing double-row tapered roller bearing TDO structure (350000 series), it has a smaller installation space, but the rigidity is slightly worse. Not sensitive to neutrality.
