Composite explosion-proof three-phase asynchronous motor

Abstract

The invention discloses a composite explosion-proof three-phase asynchronous motor comprising a base, a stator installed in the base, and a rotor in a clearance fit relationship with the stator. The rotor is fixedly installed at a rotating shaft. End covers are arranged at the front end and the rear end of the base correspondingly and respectively; bearings are arranged between the end covers and the rotating shaft; and inner bearing covers and outer bearing covers are arranged at the inner sides and the outer sides of the bearings respectively. Explosion-proof structures for preventing combustible dust from entering a bearing chamber or a motor are arranged at cooperation parts between the outer bearing covers and the rotating shaft and consist of oil sealing elements and first explosion-proof connection surfaces; the oil sealing elements sleeving the rotating shat are in an interference fit relationship with the rotating shaft; and the first explosion-proof connection surfaces arranged at the inner sides of the oil sealing elements are formed in the cooperation parts between the outer bearing covers and the rotating shaft. Second explosion-proof connection surfaces are formed at the cooperation parts between the inner bearing covers and the base and the cooperation parts between the end covers and the base. Third explosion-proof connection surfaces are formed at the cooperation parts between the inner bearing covers and the rotating shaft. The composite explosion-proof three-phase asynchronous motor has high reliability; dust explosion-proof and gas explosion-proof requirements are met; and thus the equipment can work safely.

Description

technical field [0001] The invention relates to a high-efficiency motor used in combustible dust and explosive gas environments, in particular to a compound explosion-proof three-phase asynchronous motor. Background technique [0002] With the improvement of the international community's awareness of green economy and low-carbon economy, countries are vigorously promoting the use of high-efficiency motors. On May 31, 2010, my country's Ministry of Finance and Development and Reform Commission announced the "Implementation Rules for the Promotion of High-Efficiency Motor Products". The introduction of this policy has played a role in promoting the promotion of high-efficiency and high-voltage three-phase asynchronous motors in my country. [0003] YBFBX series high-efficiency composite explosion-proof three-phase asynchronous motors (hereinafter referred to as: YBFBX series motors), are suitable for factory temperature groups T1~T4, where explosive gas and combustible dust mix...

AI Technical Summary

Problems solved by technology

It can effectively solve the explosive hazardous places where explosive gas and combustible dust mixture coexist in current direct liquefaction projects, coal liquefaction units and coal-to-hydrogen units. The traditional composite explosion-proof motor has low efficiency, and the shaft penetration part is sealed with a skeleton oil seal To achieve the purpose of preventing dust from entering the inside of the motor, the long-term use of the skeleton oil seal will lose its protective performance due to the wear and tear caused by the high-speed operation of the motor, resulting in the failure of the dust explosion-proof performance and seriously affecting the safety of the equipment

[0004] Therefore, it is urgent to design a new composite explosion-proof three-phase asynchronous motor to solve the problem of low reliability of the explosion-proof structure of the traditional composite explosion-proof motor and seriously affect the safety of equipment.

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