Mining flame-proof type third-level axial flow disrotatory local fan

Abstract

The invention discloses a mining flame-proof type third-level axial flow disrotatory local fan and solves the problems of the existing fan that the ventilation distance is short, the weight is large, and the efficiency of the fan is low. The mining flame-proof type third-class axial flow disrotatory local fan is characterized in that a III level cylinder body, a III level flame-proof motor and a III level impeller are added to a second-level disrotatory fan, and the I level impeller, the II level impeller and the III level impeller are all plastic impellers which are cast generally from modified polyethylene aggregates. The mining flame-proof type third-level axial flow disrotatory local fan provided by the invention can increase the pressure of the fan and the energy of air flow, and thus the long range ventilation is realized, an ultra-long length ventilation requirement of an advancing tunnel is fully and effectively ensured, meanwhile, the stable and efficient operation in a small flow region can be realized, and the application rang is wide; and a disrotatory structure is adopted and the effect of mutual reverse and equal-speed disrotatory is achieved, and the efficiency of the whole fan is improved; the plastic impellers have the characteristics of anti-static electricity, wear resistance and flame retardance, and the mining flame-proof type third-level axial flow disrotatory local fan has the advantages of good security, light weight, good aerodynamic performance, low noises, high efficiency and the like.

Description

technical field [0001] The present invention relates to an axial flow fan, more precisely relates to a mining axial flow fan. Background technique [0002] At present, the ventilation of the coal and rock roadway driving face in the coal mine is mainly realized by the ventilation of the press-in local fan. [0003] Commonly used FBD series fans have the disadvantage of low wind pressure: most of them are secondary fans. When long-distance ventilation is required, the fan must be moved to increase the distance of air delivery. Moreover, cast steel impellers are mostly used, which have large weight, low fan efficiency, and complicated processing and welding procedures for cast steel impellers. Contents of the invention [0004] The first purpose of the present invention is to overcome the deficiencies of the prior art and provide a mine explosion-proof three-stage axial-flow counter-rotating local fan. efficient. [0005] The second object of the present invention is to p...

AI Technical Summary

Problems solved by technology

[0003] Commonly used FBD series fans have the disadvantage of low wind pressure: most of them are secondary fans. When long-distance ventilation is required, the fans must be moved to increase the distance of air delivery.

Moreover, cast steel impellers are often used, which have high weight and low fan efficiency, and the processing and welding procedures of cast steel impellers are complicated.

Images