Air-leakage-preventing bearing sealing structure for automobile engine

Abstract

The invention discloses an air-leakage-preventing bearing sealing structure for an automobile engine. A sealing part is arranged between the ends of a bearing inner ring and a bearing outer ring and comprises a rigid framework and a sealing body wrapping the rigid framework. The inner end of the sealing body is provided with a sealing portion matched with the bearing inner ring. The outer end of the sealing body is provided with an installation portion matched with the bearing outer ring. The outer side end of the bearing inner ring is in a step shape and comprises an inner step, a slope and an outer step. The sealing portion comprises a sealing inner lip and a sealing outer lip, and an arc concave portion is arranged between the sealing inner lip and the sealing outer lip. The sealing inner lip obliquely extends to the inner step to make contact with the inner step in an abutting mode. The sealing outer lip obliquely extends to the outer step and makes contact with the slope in an abutting mode. The single-layer sealing part of the special structure is matched with a sealing groove, the better sealing effect is achieved under small frictional resistance, installation and using are convenient, stability is achieved, deformation is not likely to be caused, and the service life of a bearing is effectively prolonged.

Description

technical field [0001] The invention relates to a sealing structure of an anti-leakage bearing for an automobile engine, belonging to the technical field of automobile engine bearing manufacturing. Background technique [0002] The existing automobile engine bearing structure generally adopts a single-layer sealing structure. Under the high pressure of engine water vapor, due to the poor sealing effect of the bearing, high-pressure water vapor often enters the interior of the bearing; when water vapor enters the interior of the bearing, it will It causes deterioration of lubricating grease inside the bearing, corrosion of the bearing raceway and rolling body surface, increases the frictional resistance of the bearing during operation, causes the temperature rise of the bearing to be too fast, causes secondary tempering of the bearing material, reduces the hardness of the bearing material, and reduces the life of the bearing. In addition, there are bearings with a double-laye...

AI Technical Summary

Problems solved by technology

[0002] The existing automobile engine bearing structure generally adopts a single-layer sealing structure. Under the high pressure of engine water vapor, due to the poor sealing effect of the bearing, high-pressure water vapor often enters the interior of the bearing; when water vapor enters the interior of the bearing, it will It will cause deterioration of lubricating grease inside the bearing, corrosion of the bearing raceway and rolling body surface, increase the frictional resistance of the bearing during operation, cause the temperature rise of the bearing to be too fast, cause secondary tempering of the bearing material, reduce the hardness of the bearing material, and shorten the life of the bearing

In addition, there are bearings with a double-layer seal structure. Because the double-layer seal is used for sealing, the material cost increases, the production efficiency is low, and the processing cost is high.

Images