High-voltage explosion-proof three-phase asynchronous motor for coal mine belt conveyor

Abstract

The invention discloses a high-voltage explosion-proof three-phase asynchronous motor for a coal mine belt conveyor. The high-voltage explosion-proof three-phase asynchronous motor comprises a stator, a roller and a cooling device, wherein the stator comprises an engine base and a winding stator core arranged in the engine base; the rotor comprises a shaft and a squirrel cage rotor arranged on the shaft; one end of the shaft extends out of the engine base to form a shaft extension end and the other end is located in an end cover of the engine base to form a non-shaft extension end; the shaft extension end and the non-shaft extension end are supported in the stator through an end cover assembly separately; the cooling device comprises an air duct, an inner fan and an outer fan; the air duct and the inner fan are located in the engine base and fixed on the shaft; the air duct is communicated with the inner fan; and the outer fan is located in the end cover and fixed on the non-shaft extension end of the shaft. The high-voltage explosion-proof three-phase asynchronous motor for the coal mine belt conveyor can meet the load characteristic requirement of the coal mine belt conveyor, so that the quality problems such as long starting time of the motor, a high temperature rise of the motor, falling or melting of a rotor end ring, slot wedge falling and stator burn-out are solved, the overall performance of the motor is improved and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of motors, in particular to a high-voltage explosion-proof three-phase asynchronous motor used for a coal mine belt conveyor. Background technique [0002] Belt conveyor is a key conveying tool in modern coal mines, and its reliability directly affects the development and benefits of the coal mining industry. However, in recent years, high-voltage motors supporting belt conveyors have frequently experienced quality problems such as long motor start-up time, high motor temperature, rotor end ring falling off or melting, slot wedge falling off, and stator burning in large mines such as Shanxi, Ningxia, and Inner Mongolia. . Starting from the working conditions of the coal mine belt conveyor, the main reasons are as follows: [0003] 1. Compared with the ground factory environment, the coal mine underground environment is harsh, with high humidity (87%-100%) and high dust concentration (50-100mg / m 3 ), and some even h...

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Problems solved by technology

[0004] 2. According to the characteristics of long distance, high belt speed and high power of large belt conveyors, the motor power is required to be large, but in order to reduce the impact of single large capacity motors on the power grid, belt conveyors are designed with multiple machines Drive, there is a problem of motor power imbalance in practical applications;

[0005] 3. The coal transported from the mining face is often accompanied by gangue, iron materials, wooden sticks, etc. In order to ensure the safety of the conveying system, it is necessary to stop the motor for detection. In addition, due to the failure of the belt conveyor control system, it must also be shut down frequently , which causes frequent heavy-duty startup of the belt conveyor motor

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