Conductive rolling bearing with nickel graphite conductive coating and preparation method

Abstract

The invention discloses a conductive rolling bearing with a nickel graphite conductive coating and a preparation method. The rolling bearing comprises a bearing inner ring, a bearing outer ring, a rolling body and a retainer, the rolling body is installed between the bearing inner ring and the bearing outer ring through the retainer, and the surfaces of raceways of the bearing inner ring and the bearing outer ring are each coated with the nickel graphite conductive coating or the outer surface of the rolling body is coated with the nickel graphite conductive coating. Compared with a traditional bearing, the conductive rolling bearing has the advantages of being good in conductivity, high in bearing capacity, resistant to high-temperature molten salt corrosion, good in lubricating performance and the like.

Description

technical field [0001] The invention belongs to a rolling bearing in the technical field of rolling bearings, and in particular relates to a conductive rolling bearing with a nickel-graphite conductive coating and a preparation method thereof. Background technique [0002] Urban subway traction motors, construction machinery high-power motors, electrified railway traction motors and other motors have large traction power, little environmental pollution, and are suitable for sustainable development. This is the development direction of traction motors. Electrified railways use electric locomotives as traction power, and bearings, as important core components of major equipment and main engines, are key components to ensure the normal operation of traction motors. Due to the interaction between the magnetic field of the motor and the rolling bearing, eddy currents inevitably exist in the bearing. In recent years, more and more electric corrosion failures have been detected in...

AI Technical Summary

Problems solved by technology

The hybrid ceramic insulated bearing that insulates the bearing has complex processing technology, high production cost, and difficult to ensure the dimensional accuracy of the bearing.

Resin-coated insulating coating is brittle and has low thermal conductivity

Insulated bearings sprayed with ceramics have a good insulation effect on high-frequency shaft currents in AC motors, but eddy currents in bearing parts cannot be avoided

Traditional conductive bearings usually use the grounding method of adding peripheral conductive components such as carbon brushes. Similarly, this technology cannot avoid eddy currents in bearing components

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