End cover water-cooled molybdenum alloy gear electromotor

Abstract

The invention relates to electromotors special for motor train units, particularly to an end cover water-cooled molybdenum alloy gear electromotor. The outer wall of an electromotor housing is provided with a wire window; a stator is fixed inside an inner hole of the electromotor housing, and a rotor is fixed to the largest-diameter position of an electromotor spindle and corresponds to the stator in position; a front end cover is provided with a front screw and fixed to the front end surface of the electromotor housing, the front cover bearing hole of the front end cover is fixedly provided with a front bearing bush, and the inside of the front cover bearing hole is fixedly provided with the front bearing section of the electromotor spindle; a rear end cover is provided with a rear screw and fixed to the rear end surface of the electromotor housing, the rear cover central blind hole of the rear end cover is fixedly provided with a rear bearing bush, and the inside of a rear bearing inner hole is fixedly provided with the rear bearing section of the electromotor spindle. As an improvement, a communicating member is fixedly sealed between the electromotor housing and the front end cover, and another communicating member is fixedly sealed between the electromotor housing and the rear end cover; the front end cover is fixedly provided with a gear rack component, and a bearing without an inner ring is arranged between the gear rack component and an output gear; the component support round surface of the gear rack component is provided with a layer of molybdenum alloy hard wearing-resistant coating.

Description

technical field [0001] The invention relates to a special electric motor for an EMU locomotive, which has double strict requirements on size, space and service life, and in particular relates to a water-cooled molybdenum alloy gear motor with an end cover. Background technique [0002] High-speed EMUs have special and strict requirements on the performance of the electric motor of the traction system, such as high torque, low noise, bending moment resistance and efficient heat dissipation, etc. For this reason, most developed countries in Europe and the United States adopt various water-cooling structures for improvement. The water leakage failure rate of the end cover water-cooled motor is directly related to its reliability, and then to the safe production. Specifically, once the cooling water in the cooling water circuit enters the motor, it will not only affect the safe operation of the motor, but also affect the entire production. Safe operation brings great potential s...

AI Technical Summary

Problems solved by technology

Therefore, in order to allow the motor shaft to withstand the bending moment, the diameter of the motor shaft has to be doubled, which eventually leads to a series of disadvantages: the linear speed of the motor bearing is also doubled, its internal friction is doubled, and the heat generated by the internal friction is doubled Big

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