Deep groove ball bearing with double-layer sealing rings

Abstract

The invention discloses a deep groove ball bearing with double-layer sealing rings. The deep groove ball bearing with the double-layer sealing rings comprises a bearing outer ring, a bearing inner ring, a ball and a retainer, wherein the ball is arranged between the bearing outer ring and the bearing inner ring, and the retainer is used for fixing the ball; and the first sealing ring and the second sealing ring are further arranged between the bearing outer ring and the bearing inner ring, and a gap exists between the first sealing ring and the second sealing ring. According to the deep grooveball bearing with the double-layer sealing rings, the sealing effect of the deep groove ball bearing is good through the arrangement of the double-layer sealing rings, the service life is long, meanwhile, lubricating grease is not easy to leak, and external pollutants are not likely to enter the bearing.

Description

technical field [0001] The invention relates to the technical field of bearing sealing, in particular to a double-layer sealing ring deep groove ball bearing. Background technique [0002] Deep groove ball bearings are the most representative rolling bearings. This type of bearing has small friction coefficient, high limit speed, simple structure, low manufacturing cost, easy to achieve high manufacturing accuracy, and various size ranges and forms. It is widely used as gearbox bearings. practical. [0003] Usually, the sealed bearing filled with grease is sealed with a sealing ring on each side after filling the grease. The national standard stipulates that the allowable grease leakage rate of contact sealed bearings filled with grease (that is, the sealing lip and the inner ring seal groove are in close contact and have interference) is 5%, and that of non-contact sealed bearings (that is, the sealing lip and the inner ring are sealed) The grease leakage rate is 10% when...

AI Technical Summary

Problems solved by technology

[0004] However, the grease-filled sealed bearings used in some occasions require zero leakage, and it is difficult to achieve zero leakage with ordinary sealed bearings.

At the same time, in some special polluted environments and under certain external pressure, external dirt can easily penetrate into the bearing through the sealing ring. After the dirt penetrates into the bearing, the bearing will quickly fail. The usual single-sided seal It is also difficult to block the external dirt from penetrating into the bearing

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