Ultra-low-noise mining local fan

Abstract

An ultra-low-noise mining local fan comprises an outlet silencer, a main machine body and an inlet silencer. The main machine body comprises a motor, an impeller, an inner shell and an outer shell. The inlet silencer comprises a flow collector, a silencing wall, a silencing barrel, a side air inlet and an air inlet cover plate. The ultra-low-noise mining local fan has the beneficial effects that the inner shell and the outer shell are connected and fixed through elastic materials, and radiation noise of the main machine outer shell is greatly lowered; the inlet silencer achieves the purpose of primary silencing through section area changes and sudden expansion or shrinkage of the pipeline section; when sound waves enter the silencing wall, one part of sound energy is subjected to friction in gaps of porous materials and is converted into heat energy to be dissipated, and therefore the purpose of secondary silencing is achieved; after the silencing wall is blocked by dust, the silencing wall can be very conveniently pulled out to be cleaned or replaced, the silencing effect is kept, and the overhauling time is short; and after part of sound waves at the position of a sound source reach a side air inlet hole plate, one part of the sound waves are absorbed by the silencing material, and accordingly the purpose of tertiary silencing is achieved.

Description

technical field [0001] The invention relates to a mine ventilator, in particular to an ultra-low noise mine local ventilator. Background technique [0002] The mine ventilation system is an important part of mine mining and the basic guarantee for mine safety production. The underground working face provides personnel with breathing, dilutes and removes various toxic and harmful gases and mineral dusts underground, creates a good working environment, and guarantees the health and safety of underground workers. [0003] At present, the local fan fans produced and used in China mainly include FBD, FB, FBDC, FBY and other series. The motors of these fans are all second-class explosion-proof motors, with high motor speed and large aerodynamic noise; most models are equipped with inlet and outlet mufflers. However, the noise reduction effect is average and cannot meet user requirements. Contents of the invention [0004] The purpose of the present invention is to further redu...

AI Technical Summary

Problems solved by technology

[0003] At present, the local fan fans produced and used in China mainly include FBD, FB, FBDC, FBY and other series. The motors of these fans are all second-class explosion-proof motors, with high motor speed and large aerodynamic noise; most models are equipped with inlet and outlet mufflers. However, the noise reduction effect is average and cannot meet user requirements.

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