Electromotor

Abstract

The invention discloses an electromotor for realizing stator sealing and rotor opening ventilation manners by adopting axial flow ventilation. An adopted shaft is provided with an external circumference spiral groove and is matched with an axial flow fan with two ends clinging to each other and same spiral direction so as to form an axial flow combination ventilation device; the devices are arranged on the inner part of a rotor and two ends of the rotor so as not to occupy an extra motor axial space, so that the electromotor is compact in structure; due to different steering directions, the air flow direction is also different, but the motor can be cooled; by matching with labyrinth seal, a cooling manner combining stator seal type ventilation cooling with rotor open type ventilation cooling of the electromotor is realized, so that the stator insulation reliability and the rotor heat radiation capacity are ensured through the combined cooling manner, and the motor efficiency is improved; a stator cooling air flue is formed by (2x), (2h) and (6h); a rotor cooling air flue is formed by (5y), (9b), (4b) and (10b); the two cooling air flues are connected with each other in series and is jointly supplied with air pressure by the spiral combination device.

Description

[0001] This application is a divisional application of an invention patent application with application number: 2016101574905, invention name: using axial flow ventilation to realize stator closure and rotor open ventilation, and application date: March 17, 2016. technical field [0002] The present invention relates to a totally enclosed self-ventilated electric motor for industrial applications and for driving railway vehicles. Background technique [0003] The heat generated by the stator and the rotor of the three-phase asynchronous motor accounts for about half, and the heat generated by the stator of the industrial motor is slightly higher than that of the rotor. The traction motor used for railway vehicles has a large workload and a large slip rate of the rotor, and the heat generated by the rotor will reach the overall heat generation. More than half of the calories; [0004] Railway vehicles run on two steel rails with a standard gauge of 1435 mm. The power module c...

AI Technical Summary

Problems solved by technology

[0012] At present, open forced ventilation traction motors are commonly used in high-speed trains and locomotives, because vehicles require high motor power, and the existing open self-ventilated motors are too large to accommodate the bogie space; open forced ventilation traction motors Independent fans and air ducts are required, and they are arranged under the carriage. The installation work is very cumbersome, and it is a very troublesome task for the entire vehicle factory.

[0013] 4. The rotor of the three-phase asynchronous motor generates a lot of heat. Usually, the operating temperature of the rotor is 50 to 100 degrees higher than that of the stator. The heat of the rotor is easily transmitted to the bearing through the shaft. The high operating temperature of the bearing will reduce the performance of the grease and reduce the life of the bearing; The excessive expansion of the inner ring of the bearing may cause the working clearance of the bearing to disappear, the bearing will be stuck and the motor will be burned

Images