Drive tandem explosion-proof fan with two built-in electric motors

Abstract

A draught fan is connected in series by 2 levels of impellers of identical structure, and an electromotor is installed inside the fan. By adopting an internally installed electromotor, only a draught fan needs to be installed when equipment is installed, thereby saving the installation expense, reducing the floor space of the equipment, and lowering the operational and managerial cost. A mid-rectifier is additionally installed between an I-level fan and an II-level fan according to the principle of aerodynamics so as to improve air flow and enhance the efficiency of the draught fan; the draught fan can lead either of the fans to operate independently as a single-level main fan, or to perform double-level series operation, the wind pressure of which is twice the pressure of the single-level operation; a user can flexibly determine the operating mode of the draught fan according to different requirements of coal mines for air volume in different periods, under different conditions and in accordance with different lengths of laneways, thereby reducing the time spent on adjusting the air volume, and helping improve production safety. Because the draught fan can be divided into two levels, enterprises can choose either level at the beginning of exploiting mines according to particular conditions, thus saving initial investment.

Description

Technical field [0001] The invention relates to ventilation for underground mines, improves underground working conditions and air quality, and ensures safe production in mines. Background technique [0002] At present, fans play an extremely important role in mine safety and production. The fans currently in use have the following outstanding problems [0003] 1. The motor is external, the equipment is difficult to install, and it takes up a lot of space; [0004] 2. It takes too long to adjust the air volume of the fan, which is not conducive to the safe production of coal mines; [0005] 3. Large initial investment in equipment; [0006] 4. The management cost of the equipment operation process is high. Contents of the invention [0007] In order to solve the external motor existing in the use of the existing fan, the fan and the motor need to be installed separately, and it is not easy to be coaxial, which makes the equipment installation difficult; when adjusting ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the external motor existing in the use of the existing fan, the fan and the motor need to be installed separately, and it is not easy to be coaxial, which makes the equipment installation difficult; when adjusting the air volume, it needs to stop and change the blade angle, which takes too long, which is not conducive to the safe production of coal mines; In the early stage of mining, a high-power motor is directly configured, resulting in a large initial investment in the equipment and low operating efficiency; high management costs during the operation of the equipment.

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