High-voltage compound explosion prevention type three-phase asynchronous motor

Abstract

The invention discloses a high-voltage compound explosion prevention type three-phase asynchronous motor. The motor comprises a base, a rotating shaft and end covers, wherein explosion insulation structures are arranged in positions, where the end covers are in fit with the rotating shaft, to prevent combustible dusts from entering bearing chambers or the motor; each explosion insulation structure comprises a labyrinth seal cartridge, the rotating shaft is fixedly sleeved by the labyrinth seal cartridge, and the labyrinth seal cartridge is located outside the motor and is coaxial with the rotating shaft; and each labyrinth seal cartridge comprises a radial retaining ring and an axial cylinder, the inner ring of the retaining ring is hermetically and fixedly connected with the rotating shaft, the outer ring of the retaining ring is hermetically and fixedly connected with the outer end part of the cylinder, the inner end part of the cylinder is axially extended towards the corresponding end cover and partially inserted into the corresponding end cover, a seal groove is formed in the corresponding end cover in a position corresponding to the cylinder, and the inner end part of the cylinder is inserted into the corresponding seal groove and is in clearance fit with the corresponding seal groove. The motor provided by the invention has the advantages that dust explosion prevention measures are added based on a gas explosion prevention motor, so that dust explosion prevention and gas explosion prevention can be simultaneously achieved.

Description

technical field [0001] The invention relates to a motor used in combustible dust and explosive gas environments, in particular to a high-voltage compound explosion-proof three-phase asynchronous motor. Background technique [0002] With the improvement of safety production requirements in coal, petroleum, chemical, steel and other industries, the explosion-proof requirements for equipment are also further enhanced. There are more and more occasions with high composite explosion-proof requirements (A21 area IIC or A22 area IIC), and there is an increasing demand for equipment that can operate safely in such an environment with high explosion-proof requirements. In this situation, there is an urgent need to improve the clearance design of the parts of the original motor and develop a composite explosion-proof motor. [0003] There is no effective design in the existing motor products that can meet the requirements of compound explosion-proof, and the industry uses motors that...

AI Technical Summary

Problems solved by technology

However, there are still no dust explosion-proof measures, and there are great safety hazards

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