Multifunctional Motor Bearing Sealing Structure

Abstract

The present invention relates to fields relating to electric motor bearing sealing structures, and in particular to a multi-functional electric motor bearing sealing structure, aiming at solving the technical problems of single function of the current bearing sealing structure, lubricating grease in a bearing chamber tending to enter an electric motor, and oil mist in a gear box tending to enter the bearing chamber. The following technical solution is mainly used: an end cover is provided with a two-step stepped hole gradually expanding from inside to outside; the end cover is further provided with an air inlet channel with two ends respectively in communication with the outside atmosphere and a second through hole; an outer bearing cover is arranged adjacent to an outer side of a bearing cover; an inner ring of the outer bearing cover is provided with several annular grooves, and each annular groove is in communication with an oil return channel leading to a gear box; an outer ring of an outer sealing ring is provided with annular steps corresponding to the annular grooves; an inner end face of the outer bearing cover is further provided with an oil return cavity; and the end cover is further internally provided with a waste oil storage chamber in communication with the oil return cavity, and an exhaust channel with two ends respectively in communication with the second through hole and the oil return cavity. The present invention is mainly used for sealing a bearing of an electric motor.

Description

technical field [0001] The invention relates to the related field of motor bearing sealing structure, in particular to a multifunctional motor bearing sealing structure. Background technique [0002] The motor bearing sealing structure is a sealing structure set up to prevent dust, water, acid gas and other sundries from entering the bearing, and at the same time prevent the loss of bearing lubricant. A reasonable and reliable motor bearing sealing structure is crucial to the safe operation of the motor. important. [0003] The transmission gear in the gearbox matched with the motor is lubricated by splash lubrication. The large gear is immersed in the lubricating oil, and when it rotates at high speed, the lubricating oil is brought up to lubricate the meshing teeth. Due to the friction between the large gear and the lubricating oil and the meshing gears, the temperature of the lubricating oil rises, and the air pressure in the gearbox rises accordingly. Although there is...

AI Technical Summary

Problems solved by technology

This kind of sealing structure has the following problems: a. The structure has a single function, which only acts as a seal, and cannot balance the air pressure difference between the gearbox and the motor; A good structure only has an oil discharge hole or an oil injection hole on the end cover. The structure is old-fashioned and the utilization rate of components is low; c. The role of the internal cooling air of the motor forms a local large negative pressure on the end face of the inner bearing chamber, which cannot be self-adjusted. As a result, the lubricating grease in the bearing chamber is sucked and leaked, polluting the internal components of the motor, and causing safety hazards; d. When the motor is running at high speed, under the action of high pressure in the gearbox and negative pressure inside the motor, the oil mist can easily enter the bearing chamber and pollute the bearing chamber Grease, damage to bearings

Images