Injection-discharge oil device for lubrication of rotor bearing of high capacity motor

Abstract

The invention relates to an injection-discharge oil device for lubrication of a rotor bearing of a high capacity motor, which is mainly characterized in that: the upper part of an end cover of the motor is provided with an injection oil channel hole, a bearing pressing end face of a bearing inner cover is provided with a ring oil groove communicated with the injection oil channel hole and the bearing, the outer end face of a bearing outer cover is provided with a discharge oil groove with a ring opening communicated with the bearing, the opening of the discharge oil groove is provided with anoil throwing disc fixedly connected with a rotary shaft of the motor, and the lower part of the bearing outer cover is provided with a discharge oil hole communicated with the discharge oil groove. The device has the advantages that: the structure of an oil path is reasonably designed, and the lubricating performance is reliable; because the whole oil path is enclosed and circulated, the intrusion of dust and sewage and the plugging of the oil part can be effectively avoided, the cleanness of the lubricating grease is ensured, the spoiled waste of the lubricating grease is eliminated, and theoperation of injection oil is convenient.

Description

technical field [0001] The invention belongs to the technical field of motor accessory parts, and relates to a large-capacity motor rotor bearing lubricating oil injection and discharge device. Background technique [0002] During the operation of a large generator, as the bearing connecting the motor shaft and the end cover, it bears a huge and alternating radial and axial load, so the lubrication during its operation is particularly important. Once there is poor lubrication , it will cause downtime accidents due to bearing damage or burning. Moreover, the replacement and maintenance of the bearing is very troublesome. The generator end cover, bearing and rotor must be disassembled and disassembled before a new bearing can be replaced. In addition, the bearing and the motor shaft are assembled by hot pressing, which is very difficult to disassemble. Users bring great economic losses. In the existing technology, the lubrication of the motor bearings is usually provided wit...

AI Technical Summary

Problems solved by technology

The disadvantages of this method of oil injection and drainage are: waste oil ages and deteriorates at high temperature, and carries metal powder, which accumulates for a long time and stays in the cavity between the inner wall of the bearing outer cover and the bearing, and easily flows back to the friction surface of the bearing , causing contamination of newly replenished grease, resulting in lubrication failure of the bearing, early wear and damage, and waste of grease

Moreover, there is no effective seal between the outer bearing cover and the motor shaft, and external dust can easily enter the friction surface of the bearing, which affects the lubrication effect of the bearing.

In addition, when injecting and discharging oil at the fan end of the motor, it is necessary to stop the machine, disassemble and install the fan cover and plug, which is very troublesome.

So far, this problem has not been solved satisfactorily

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