Rail vehicles and their traction motors

Abstract

The invention discloses a traction motor. The traction motor comprises a bearing outer oil seal, a bearing and a bearing inner oil seal, wherein the bearing outer oil seal, the bearing and the bearinginner oil seal are sequentially arranged in the axial direction, an outer oil seal oil storage chamber is formed in the bearing outer oil seal, and an inner oil seal oil storage chamber is formed inthe bearing inner oil seal. The traction motor further comprises an annular grease pocket, wherein the annular grease pocket comprises an annular groove which is coaxially formed with the bearing anda control piece which is used for driving the annular groove to move to be in contact with the bearing in the axial direction or move to be away from the bearing in the axial direction; the annular groove is arranged in the outer oil seal oil storage chamber or the inner oil seal oil storage chamber; the end, close to the bearing, of the annular groove in the axial direction is open; the end, awayfrom the bearing, of the annular groove in the axial direction is sealed, and a grease supplement opening is formed in the side, close to the annular grease pocket, of the bearing. Old grease in thebearing of the traction motor can be completely replaced during grease supplement maintenance. The invention further discloses a rail vehicle comprising the traction motor, wherein the old lubricatinggrease in the bearing of the traction motor can be completely replaced during grease supplement maintenance.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a traction motor. Furthermore, the invention also relates to a rail vehicle comprising the traction motor described above. Background technique [0002] Generally, the rotors of traction motors for rail vehicles use rolling bearings and are mainly lubricated with grease. [0003] Among them, the grease replenishment maintenance of the traction motor bearing 02 for rail transit vehicles is a key link to ensure the life of the traction motor bearing 02. For details, please refer to figure 1 , figure 1 It is a schematic diagram of the structure of the traction motor in the prior art. There are oil storage chambers on both sides of the bearing 02, grease is provided in the bearing 02 and the two oil storage chambers, and the end cover 06 of the motor is provided with grease or An injection port for fat replenishment, and the injection port is correspondingly arranged in one of the...

AI Technical Summary

Problems solved by technology

[0004] However, part of the grease will age and harden in the oil storage chamber and block the bearing 02. During the grease replenishment process, due to the blocking of the aged old grease 07, the new grease 08 may not be able to store oil after entering the oil storage chamber. The old lubricating grease 07 in the chamber and the bearing 02 is directly discharged, so the old lubricating grease 07 in the bearing 02 may not be replaced at all

In the bearing 02, if the new grease 08 cannot completely replace the old grease 07, the lubrication effect cannot be guaranteed, and thus the reliable operation of the bearing 02 and the service life of the bearing 02 cannot be guaranteed

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