Self-sealing self-aligning roller bearing

Abstract

The invention discloses a self-sealing self-aligning roller bearing. The self-sealing self-aligning roller bearing comprises an outer ring, an inner ring, rollers, holders and a sealing ring. The holders are arranged on the upper portion of the inner ring. The rollers are installed on the holders, and the outer ring is arranged on the upper portions of the rollers. The external diameter of each inner ring small flange is in a circular arc shape, and the external diameters of the two small flanges are combined to form a sphere which uses the bearing rotation center as the center of the circle.The sealing ring is in a circular ring shape, a structure of protrusions is arranged on the external diameter of the sealing ring, the internal diameter of the sealing ring is a beveled sealing lip, and the sealing ring is installed between the outer ring and the inner ring of the bearing. The protrusions on the external diameter of the sealing ring and outer ring toothed grooves of the bearing are in interference fit so that the sealing ring can be fixed to the bearing. The sealing lip of the sealing ring and the edges of the inner ring small flanges of the bearing are in spherical tangency,the inner ring small flanges of the bearing make contact with the sealing lip of the sealing ring all the time when self-alignment of the bearing is conducted, and the situation that the certain-angleself-alignment effect is achieved when self-alignment of the bearing is conducted is guaranteed. The self-sealing self-aligning roller bearing can preferably meet the working condition of long-term operation of the bearing, and has the effects of being long in life and high in reliability and being free of bearing maintenance.

Description

technical field [0001] The invention relates to a self-aligning roller bearing, in particular to a self-sealing structure. Background technique [0002] Since the axis line of the outer ring is often not parallel to the axis line of the inner component when the self-aligning roller bearing is working, the bearing is required to have a certain self-aligning angle. The conventional bearing sealing structure is that the sealing ring is embedded on a fixed and non-rotating part. , usually the outer ring, and the sealing lip contacts the rotating parts. This structure will produce a large gap between the sealing ring and the rotating inner ring when the bearing is aligned, and cannot play a sealing role. Therefore, the conventional self-aligning roller bearing itself Without seals. Open bearings need to be filled with grease regularly, which cannot meet the long-term maintenance-free requirements of oil field pumping units. [0003] In the existing spherical roller bearings, in...

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Problems solved by technology

[0002] Since the axis line of the outer ring is often not parallel to the axis line of the inner component when the self-aligning roller bearing is working, the bearing is required to have a certain self-aligning angle. The conventional bearing sealing structure is that the sealing ring is embedded on a fixed and non-rotating part. , usually the outer ring, and the sealing lip contacts the rotating parts. This structure will produce a large gap between the sealing ring and the rotating inner ring when the bearing is aligned, and cannot play a sealing role. Therefore, the conventional self-aligning roller bearing itself without seal

Open bearings need to be filled with grease regularly, which cannot meet the long-term maintenance-free requirements of oil field pumping units

[0003] In the existing spherical roller bearings, in order to solve the sealing problem, two additional sealing seats are usually added. The sealing ring is installed on the sealing seats, and the sealing lip contacts the end face of the inner ring of the bearing, which not only increases the number of parts, but also changes the installation size of the bearing. At the same time, due to the influence of the seal seat, the centering angle of the bearing will be reduced, which will affect the centering effect, and the bearing will still have a gap when the axis lines of the inner and outer rings of the bearing are not parallel, and the sealing effect will not be good.

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