Self-lubricating sliding bearing for high-speed large-power motor

Abstract

The invention discloses a self-lubricating sliding bearing for a high-speed large-power motor. A bearing box adopts a D-shaped large oil cavity structure; and cooling fins are cast at the periphery of the oil cavity. The structure inside the bearing box can avoid the situation that the high-temperature lubricating oil leaked from the inner end and the outer end of a bearing bush is directly introduced to a lubricating clearance between a shaft and the bearing bush by an oil ring, and ensure that the lubricating oil supplied by the oil ring to the bearing bush is efficiently-cooled low-temperature lubricating oil, so as to reduce the temperature of the bearing. The improved structure of the oil ring can enlarge the amount of the bearing lubricating oil, enhance the lubrication of the bearing bush, and reduce the friction loss of the bearing bush. An air passage is cast in the bearing box to compensate air that is sucked by the local part of the bearing box by the air outside the bearing box. A cavity inside the bearing box is partially sealed, so that the partial negative pressure that is naturally formed when the gas is expanded isothermally and by the equal volume can counteract the negative pressure inside the motor, which ensures that the sliding bearing is free from the leakage hidden trouble. The sliding bearing has the advantages of reasonable structure and design, strong bearing radiating capability, reliability in lubrication, good sealing performance and the like.

Description

technical field [0001] The invention belongs to the technical field of motor accessories, and relates to a self-lubricating sliding bearing structure for high-speed and high-power motors. Background technique [0002] Motors using self-lubricating sliding bearings do not require an external circulating oil system, have the advantages of low initial capital investment in equipment, convenient installation and maintenance, and easy operation and running status monitoring. Therefore, they have been widely used in modern industries. In the known technology, the self-lubricating sliding bearing used by the motor relies on the oil ring that rotates with the shaft to bring the lubricating oil stored in the bearing box into the gap between the shaft and the bearing bush for lubrication. The heat generated by the friction between the bearing bush and the shaft is mainly dissipated by the convective heat exchange between the bearing seat and the air in the natural environment. Limite...

AI Technical Summary

Problems solved by technology

In the prior art, although measures such as forced air cooling and strengthening of bearing seals are taken for the bearings, the effect is still not ideal

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