Multifunctional motor bearing sealing structure

Abstract

The invention relates to the field of motor bearing sealing structures, in particular to a multifunctional motor bearing sealing structure. The objective of the invention is to solve problems that thecurrent bearing sealing structure has single function, lubricating grease in a bearing chamber easily enters the motor and oil mist in a gear box easily enters the bearing chamber. The structure is characterized in that a two-stage stair hole which is gradually expanded from the interior to the exterior is arranged in the end cover; an air charging channel is arranged in the end cover and two ends of the air charging channel communicates with the external atmosphere and a second through hole; an outer bearing cover is arranged to be adjacent to the outer side of the bearing cover; multiple annular grooves are arranged in the inner ring of the outer bearing cover; each annular groove communicates with an oil returning channel led to the gear box; annular stairs are arranged on the outer ring of an outer sealing ring by corresponding to the annular grooves; an oil returning cavity is arranged in the end face of the outer bearing cover; a waste oil storage chamber communicating with theoil returning cavity, and an air discharging channel are arranged in the end cover, wherein two ends of the air discharging channel communicate with the second through hole and the oil returning cavity. According to the invention, the structure is mainly used for sealing of the motor bearing.

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