Bearing structure and motor

Abstract

The invention provides a bearing structure and a motor. The bearing structure comprises a bearing outer ring (1), a bearing inner ring (2), a rolling body (3) and a conductive structure, the bearing inner ring (2) is sleeved with the bearing outer ring (1), the rolling body (3) rolls in a raceway formed by the bearing outer ring (1) and the bearing inner ring (2), and the conductive structure is arranged between the bearing outer ring (1) and the bearing inner ring (2) and conductively connects the bearing inner ring (2) and the bearing outer ring (1). According to the bearing structure, the potential difference of the bearing inner ring and the bearing outer ring can be effectively eliminated, and the electric corrosion resistance of a bearing is ensured.

Description

technical field [0001] The present application relates to the technical field of bearings, in particular to a bearing structure and a motor. Background technique [0002] When the motor shaft rotates inside the motor with an alternating magnetic field, an electromotive force is formed on the shaft. The electromotive force on the rotating shaft needs to form a loop through the conductor, and the motor bearing assumes the role of the conductor in the loop. [0003] When the motor shaft is running, due to the need to use lubricating oil inside the motor bearing, an insulating oil film will be formed between the inner ring of the bearing, the outer ring of the bearing and the rolling elements, resulting in the accumulation of charges on the shaft of the motor. Sufficient charge accumulation makes a large enough potential difference between the inner ring and outer ring of the motor bearing, and a large enough potential difference will induce spark discharge between the raceway ...

AI Technical Summary

Problems solved by technology

[0005] However, although this bearing structure can insulate the bearing and the bearing chamber, when the shaft voltage continues to accumulate far greater than the maximum voltage that the bearing can withstand, the bearing capacitance will be broken down, and the shaft current will still form a current in the inner and outer rings through the bearing balls. Cause bearing corrosion, so the problem of bearing electrical corrosion is not substantially solved

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