Explosion-proof three-phase asynchronous motor suitable for mine working conditions

Abstract

The invention discloses an explosion-proof three-phase asynchronous motor suitable for mine working conditions, which includes a main shaft assembly, a rotor, a stator, a casing, a front end cover and a rear end cover, and a front cover bearing is arranged where the main shaft assembly passes through the front end cover. A junction box is set on the outside of the shell, the external power is connected to the motor through the power cord, a gasket is provided on the contact surface between the front end cover and the casing, a gasket is provided on the contact surface between the rear end cover and the casing, the center of the front cover, the front cover bearing The side facing the outside is provided with a rotary shaft seal, and positive pressure safety gas is introduced into the casing. A through hole is provided on the shell of the casing, and the through hole connects the interior of the casing with the space in the junction box, and the positive pressure safety gas introduced into the casing is introduced through the power cord. The power line includes cables and air pipes. Terminals are installed in the junction box. The terminal is connected to the stator. The cable is connected to the terminal. The air pipe extends into the junction box. The end of the air pipe away from the junction box is blown into the ground through an external fan. on the air.

Description

technical field [0001] The invention relates to the field of motors, in particular to an explosion-proof three-phase asynchronous motor suitable for mine working conditions. Background technique [0002] Electrical appliances in mines have very high safety requirements, and motors used in mines must be explosion-proof. [0003] In the prior art, explosion protection is mostly carried out by means of flameproofing, that is, even if an explosion occurs at some high-temperature points, as long as the explosion does not spread, the explosion of the ambient gas around the motor will not be caused by the explosion at a small point. Explosion, then it is called explosion-proof. [0004] However, the components of the gas in the mine are always under the characteristics of being explosive. As long as the third factor of the explosion-the temperature reaches the explosion point, it will cause an explosion. The sealing additional structure is very bulky, which greatly increases the ...

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Problems solved by technology

[0004] However, the components of the gas in the mine are always under the characteristics of being explosive. As long as the third factor of the explosion-the temperature reaches the explosion point, it will cause an explosion. The sealing additional structure is very bulky, which greatly increases the complexity and manufacturing cost of the motor, and greatly increases the weight

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