Lubrication structure of locomotive motor bearing

Abstract

The invention discloses a lubrication structure of a locomotive motor bearing. The motor comprises a rotating shaft, a bearing inner cover, a bearing, an end cover and a bearing outer cover, wherein the rotating shaft is supported on the end cover by the bearing, the bearing inner cover and bearing outer cover are respectively mounted on the inner and outer sides of the bearing, the rotating shaftextends outside the motor to cooperate with the gear box, the bearing inner cover is further provided with a first vent hole, the end cover is further provided with a second vent hole, the first venthole is communicated with the inside of the motor, the second vent hole is communicated with the outside of the motor, and the first vent hole cooperates with the second vent hole to treat the negative pressure generated by movement of the motor, which balances the internal and external pressures of the motor and ensures that the bearing lubricating oil only enters the motor bearing system when the motor is running, without entering the rotor and other parts.

Description

technical field [0001] The invention relates to the field of motors, in particular to a lubricating structure for a locomotive motor bearing. Background technique [0002] In the operation of railway rolling stock, the traction motor is one of the key components to ensure its safe operation, and the motor bearing is an important part to ensure the operation of the traction motor. Its reliability and life are directly related to the quality and safety of transportation. [0003] With the large-scale introduction of my country's railway speed increase and high-speed EMUs, higher requirements are put forward for the performance and reliability of bearings, and the requirements for bearing lubrication structures are also getting higher and higher. [0004] The bearing is used to support the radial load caused by the action of the rotor shaft and the linkage shaft joint, so as to realize frequent operation. Under normal circumstances, lubricating oil enters the inner and outer r...

AI Technical Summary

Problems solved by technology

Although this structure uses the same lubricant for the motor and the gearbox, it does not treat the gearbox oil. If the gearbox oil is contaminated, it can directly enter the motor bearing, causing pollution to the bearing system, resulting in excessive temperature or wear of the motor bearing.

[0006] In actual manufacturing, the motor and the gearbox cannot be completely sealed, so there are gaps inside the bearing and the motor

When the motor is running, a negative pressure is formed between the rotor on the motor shaft and the bearing chamber, and the negative pressure will suck the unfiltered lubricating oil in the gearbox into the bearing chamber through the gap and into the motor, destroying the motor insulation system, causing Faults such as motor grounding or inter-turn short circuit make the motor unable to operate normally, and serious accidents will cause major safety accidents and bring immeasurable economic losses

Images