Hub bearing sealing ring of railway wagon and bearing equipped with same

Abstract

The invention relates to a hub bearing sealing ring of a railway wagon. The hub bearing sealing ring of the railway wagon comprises an outer framework which is fixed to an outer ring of a bearing, an inner framework which is fixed to an inner ring of the bearing, and a maze type sealing part which is arranged between the inner framework and the outer framework, wherein the inner framework comprises an inner ring which fixedly sleeves the periphery of the inner ring of the bearing, an outer ring which is annularly arranged at the periphery of the inner ring of the inner framework, an outer annular plate which is fixedly connected between the outer end of the inner ring of the inner framework and the outer end of the outer ring of the inner framework, and an inner annular plate which is fixedly connected to the inner end of the inner ring of the inner framework and radially outwards extends; the maze type sealing part comprises a sealing body, and a plurality of lip parts which extend from the sealing body and form maze gaps with the wall surfaces of an inner chamber of the inner framework; lubricating grease fills each maze gap to form a lubricating grease sealing ring. According to the hub bearing sealing ring of the railway wagon, the inner framework box design is adopted, so that vulcanized rubber is not exposed in air; the added maze structure can effectively prevent outside foreign materials and liquid from invading as well as prevent the inside lubricating grease from leaking.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a sealing ring of a railway freight wheel hub bearing and a bearing equipped with the sealing ring. Background technique [0002] At present, the hoop spring structure is usually used in the traditional railway bearing sealing ring. The main lip of this structure is in interference fit with the shaft, and the wear and heat will be large in high-speed applications, which will easily cause early failure of the seal and eager cutting of the shaft. Patent application number 201410269871.1 discloses a labyrinth-type non-contact sealing ring. The rubber is directly vulcanized on the outer frame. This design has a low friction torque, thereby reducing the temperature rise, and has a certain ability to prevent foreign matter from entering. However, the reliability of this design is poor, and the rubber is exposed on the outside, and the joint between the outer metal frame and the rubber...

AI Technical Summary

Problems solved by technology

However, the reliability of this design is poor, and the rubber is exposed outside, and the joint between the outer metal frame and the rubber is likely to cause debonding, resulting in early failure. In addition, the ability to prevent external liquid from entering is also insufficient, so a new type of sealing ring is urgently needed. Low friction torque and low temperature rise, but also to prevent the intrusion of external foreign objects and liquids, the leakage of internal grease, etc.

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