Electric conduction oil seal with electric conduction rubber, for railway bearing

Abstract

The invention discloses an electric conduction oil seal with electric conduction rubber, for a railway bearing. The electric conduction oil seal comprises the electric conduction rubber, an electric conduction adhesive, a metal inner framework and a metal outer framework, wherein the electric conduction rubber is bonded with the metal outer framework through the electric conduction adhesive to form an outer oil seal; a rubber sealing lip of the electric conduction rubber is in tight contact with the metal inner framework through press fitting; the outer oil seal tightly cooperates with the metal inner framework through press fitting to form the electric conduction oil seal; the electric conduction oil seal is loaded in the bearing in a press fitting manner; and the metal inner framework tightly cooperates with an inner ring of the bearing, and the metal outer framework tightly cooperates with an outer ring of the bearing. According to the electric conduction oil seal disclosed by the invention, electric currents produced through rolling in the bearing can be timely transmitted out, the damage of electric corrosion to the bearing is greatly reduced, and the maintenance-free cycle and the service life of the bearing are prolonged.

Description

technical field [0001] The invention relates to a conductive oil seal for railway bearings with conductive rubber, which belongs to the field of bearing sealing. Background technique [0002] Dismantling the bearings that have been in operation for a long time will reveal that there will be continuous periodic grooves in the running direction of the raceway surface. Through the scanning electron microscope (SEM), we will clearly see that almost all the damaged surfaces are densely covered with concave grooves. Pits and um-level solder joints. The formation of such pits and welds is due to the electrical discharge that occurs between the raceway and the tiny contact points on the rolling element surface. [0003] During the high-speed operation of railway bearings, electricity will be generated by friction between the raceway and the rolling elements. Under full fluid lubrication, the current will break through the weak points of the oil film, and the energy generated by the...

AI Technical Summary

Problems solved by technology

This can cause significant bearing vibration, which eventually leads to failure of the entire bearing

[0004] At present, the railway bearing oil seals used at home and abroad do not have the function of directing the accumulated current inside the bearing to the outside, and cannot prevent electric corrosion pits and solder joints on the surface of the bearing rolling elements, and avoid the occurrence of pits and solder joints on the surface of the rolling elements. heat and vibration

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