Axial surface oil seal used for high-speed motor

Abstract

The invention discloses an axial surface oil seal used for a high-speed motor. The axial surface oil seal used for the high-speed motor comprises a circular ring-shaped metal casing and a rubber ring, wherein a circle of groove is formed in the periphery of the inner diameter of the circular ring-shaped metal casing; the one section of the outer edge of the groove bottom upwards extends in a vertical direction to form a circumference of vertical groove wall; the outer edge of the top of the vertical groove wall extends in outward oblique direction to form a sealing protective structure of the rubber ring; a positioning part of the rubber ring is circular ring-shaped, the height of the positioning part is matched with the vertical groove wall of the groove, and the width of the bottom of the positioning part is matched with the width of the groove; the top of the positioning part extends in the outward oblique direction to form a sealing part; and the part between the inner diameter of the bottom of the sealing part and the inner diameter of the top of the positioning part forms a buckling surface of the rubber ring, and the buckling surface is matched with a buckling structure. The axial surface oil seal is applicable to the high-speed motor, and is simple in structure, low in manufacturing cost, long in service life and obvious in effect.

Description

technical field [0001] The invention relates to a sealing structure of a motor, in particular to an oil seal suitable for a high-speed motor. Background technique [0002] The patent authorized by the inventor with the notification number CN2662520Y discloses a special axial surface oil seal for motors. The oil seal with this structure cannot be applied to high-speed motors. When the shaft diameter of the motor is greater than 70 mm and the speed is 3000 rpm, the rubber ring will Disengagement occurs. Because the higher the speed of the motor, the larger the diameter of the motor shaft, the greater the centrifugal force on the rubber ring in the oil seal when the motor rotates, and the easier it is to separate from the metal ring shell and become a strip of rubber. For oil seals with this structure, the bottom end surface of the metal ring shell is prone to arching. When the arching is 0.3mm, the machine will be deflected when the machine moves, causing the temperature to r...

AI Technical Summary

Problems solved by technology

However, when the frame oil seal is used, the contact surface between the frame and the motor shaft rubs, and the friction temperature is higher than 100 degrees, causing the grease in the bearing chamber to smoke, which is easy to burn the bearing and cause safety hazards

When the V-ring is used, if the interference between the V-ring and the motor shaft is more than 5mm, the V-ring will generally crack within three months. If the interference is below 5mm, the V-ring will crack when the motor rotates at high speed. easy to drop

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