Hollow deep-hole tapered roller thrust bearing

Abstract

The invention relates to a hollow deep-hole tapered roller thrust bearing. The hollow deep-hole tapered roller thrust bearing mainly comprises an upper seat ring, a lower seat ring, a retainer and a hollow deep-hole tapered roller. The hollowness of the tapered roller ranges from 50% to 65%, and the deep-hole structure is cylindrical, conical, spherical or parabolic. According to the technical scheme, the hollow deep-hole tapered roller is mounted in the retainer to form a roller assembly, and then the roller assembly, the upper seat ring and the lower seat ring form the thrust bearing. The tapered roller adopts the hollow structure and the deep-hole structure, the contact rigidity of the tapered roller can be reduced, and when the thrust bearing bears the axial load, the stress concentration phenomenon at the ends of the roller can be effectively reduced. The vibration absorbing and reducing performance of the thrust bearing can be increased with the hollow structure, the weight of the whole bearing can be reduced, and meanwhile, the heat dissipation area and the lubricating oil storage space are increased, so that the service life of the bearing is prolonged. Thus, the bearing isapplicable to bad working conditions such as high speed, heavy load, high temperature, impact and the like.

Description

technical field [0001] The invention relates to a thrust tapered roller bearing mainly bearing axial loads, in particular to a deep cavity hollow tapered roller thrust bearing under high-speed, heavy-load, and large-impact working conditions. Background technique [0002] Thrust tapered roller bearings mainly bear axial loads, but failures such as fatigue, severe wear, and ablation often occur at both ends of the tapered rollers, which cause premature failure of the bearing and reduce the service life of the bearing. The main reason is that under the axial load, the equivalent stress and contact stress at both ends of the tapered roller are larger than the middle part, that is, the stress concentration at the end of the roller or "edge effect" is more serious. When running continuously for a long time, It is easy to cause fatigue failure at the end of the tapered roller. At the same time, because the lubrication storage space is limited or cannot be replenished in time, the...

AI Technical Summary

Problems solved by technology

[0002] Thrust tapered roller bearings mainly bear axial loads, but failures such as fatigue, severe wear, and ablation often occur at both ends of the tapered rollers, which cause premature failure of the bearing and reduce the service life of the bearing

The main reason is that under the axial load, the equivalent stress and contact stress at both ends of the tapered roller are larger than the middle part, that is, the stress concentration at the end of the roller or "edge effect" is more serious. When running continuously for a long time, It is easy to cause fatigue failure at the end of the tapered roller

At the same time, because the lubrication storage space is limited or cannot be replenished in time, the lubrication is insufficient, which leads to excessive frictional heat generation of the bearing during high-speed operation and cannot be fully dissipated, resulting in ablation failure of the bearing.

However, when the thrust bearing is under a large impact condition, the thrust bearing of the tapered roller with a solid structure is relatively rigid, which may easily cause serious deformation or rupture at both ends of the tapered roller

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