Motor bearing cooling structure

Abstract

The embodiment of the invention provides a motor bearing cooling structure. The motor bearing cooling structure comprises an end cover, a bearing, a main shaft and an inner sealing ring. First centrifugal fan blades are arranged on the inner sealing ring, a cavity used for containing the first centrifugal fan blades is formed in the inner wall of the end cover, an air outlet channel and an air inlet channel which extend to the cavity are formed in the outer wall of the end cover; the air outlet channel, the air inlet channel and the cavity jointly form a bearing cooling air channel; and the air inlet channel is arranged close to the shaft hole, so that the bearing cooling air channel is close to the bearing. The inner sealing ring is in transmission connection with the main shaft, when the main shaft rotates, the inner sealing ring is driven to rotate, the first centrifugal fan blades on the inner sealing ring drive air to enter the cavity from the air inlet channel, and the air in the cavity flows out from the air outlet channel; and the air inlet channel is arranged close to the shaft hole, and in the air circulating process, the air in the air inlet channel exchanges heat with the side wall of the shaft hole, so that heat dissipation of the end cover near the shaft hole is achieved, cooling of the bearing is achieved, and the situation that the lubricating performance is affected due to the fact that the temperature of the bearing is too high is avoided.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a cooling structure for motor bearings. Background technique [0002] Motors are commonly used in rail trains, automobiles and other equipment as a power source. The motor includes a housing, a stator and a rotor. The stator is arranged on the inner wall of the housing, and the stator is surrounded by a rotating cavity. The rotor is arranged in the rotating cavity. The rotor One end has a main shaft protruding outside the housing. [0003] In the related art, the housing includes end caps for blocking the two ends of the rotating cavity, the end caps are provided with shaft holes, the main shaft protrudes from the shaft holes to the outside of the housing, and a bearing is provided between the main shaft and the shaft holes to realize The main shaft rotates at high speed in the shaft hole of the end cover. [0004] During the working process of the motor, the rotor speed is high...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a motor bearing cooling structure, which is used to solve the technical problem in the prior art that the rotor rotates at a high speed during the operation of the motor, which causes the temperature of the bearing to rise, thereby affecting the lubrication performance of the bearing.

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