Magnetofluid sealed positive pressure explosion-proof motor

Abstract

The invention relates to the technical field of explosion-proof motors, in particular to a magnetofluid sealed positive pressure explosion-proof motor. The motor comprises a shell, a rotor, retainers,a positive pressure system and a protective shell; the rotor is installed in the shell, and the retainers sleeve the outer sides of the two ends of the rotor; a part, located outside the shell, of arotor rotating shaft is fixedly sleeved with a plurality of outer convex rings. The two retainers are embedded into embedding grooves in the two sides of the shell respectively; permanent magnets arearranged in the retainers; the shell is connected with the positive pressure system; the positive pressure system comprises a gas conveying pipe, a gas pressure detector and a protective gas tank; thegas conveying pipe is embedded in the outer wall of the shell; the other end of the gas conveying pipe is communicated with the protective gas tank. By the adoption of the technical scheme, a sealingring and lubricating oil are arranged between the outer end faces of the retainers and the shell in the sealing system, the sealing ring of the sealing system and the shell can achieve static sealing, an outer convex ring and an inner concave ring are matched with each other to form a zigzag dust blocking face, and the dust blocking effect is achieved.

Description

technical field [0001] The invention relates to the field of explosion-proof motors, in particular to a magnetic fluid sealed positive pressure type explosion-proof motor. Background technique [0002] During the development of positive pressure explosion-proof motors at the present stage, the rotating seal of the motor has always been the most difficult problem to solve. The known sealing measures currently have a large amount of leakage, and it is difficult to ensure that the inside of the motor is a positive pressure space. When the explosive gas enters the motor, it is easy to cause an explosion, and the consequences are extremely serious. Even if the positive pressure space inside the motor can be ensured, more positive pressure gas will be consumed due to the large leakage. Therefore, the present invention comes about. Contents of the invention [0003] The object of the present invention is to solve the shortcomings in the prior art, and propose a magnetic fluid sea...

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Problems solved by technology

[0002] During the development of positive pressure explosion-proof motors at the present stage, the rotating seal of the motor has always been the most difficult problem to solve. The known sealing measures currently have a large amount of leakage, and it is difficult to ensure that the inside of the motor is a positive pressure space. When the explosive gas enters the motor, it is easy to cause an explosion, and the consequences are extremely serious. Even if the positive pressure space inside the motor can be guaranteed, more positive pressure gas will be consumed due to the large leakage. Therefore, the present invention

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