Low noise local ventilator for mine

A local ventilation and low-noise technology, which is applied in the ventilation of mines/tunnels, components of pumping devices for elastic fluids, mining equipment, etc., can solve the problem of ineffective noise reduction of rotating noise and eddy current noise, and the aerodynamic performance of fans. To improve the sound absorption and noise reduction effect and increase the sound absorption area of ​​the flow channel

Pending Publication Date: 2019-03-01
WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although this technical solution can achieve a certain noise reduction function, its noise reduction treatment is mainly realized by outsourcing the noise reduction structure on the fan, and the noise reduction effect on the rotating noise and eddy current noise is not obvious, and the aerodynamic performance of the fan has a greater impact

Method used

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  • Low noise local ventilator for mine
  • Low noise local ventilator for mine
  • Low noise local ventilator for mine

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] like Figure 1 to Figure 3 As shown, a low-noise mining local ventilator of the present invention includes an anechoic box and a fan host installed in the anechoic box. The fan host is composed of a primary fan 11 and a secondary fan 12. On the left and right sides of the anechoic box, an anechoic current collector 1 and an anechoic diffuser 6 are arranged oppositely.

[0036] The muffler collector 1 is mainly composed of a muffler structure and a built-in rectifier 2, and the built-in rectifier 2 is an arc-shaped rectifier; the muffler diffuser 6 is mainly composed of a muffler structure and a built-in diffuser 5, and the built-in diffuser 5 is selected Conical diffuser.

[0037] The above-mentioned muffler structures all include three concentric ring-type mufflers: inner, middle and outer, wherein the outer muffler 10...

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Abstract

The invention discloses a low noise local ventilator for the mine. The ventilator comprises a silence chamber and a fan body installed in the silence chamber, wherein the left and right sides of the silence chamber are oppositely provided with a silence current collector and a silence diffuser; the silence current collector is mainly composed of silencer structures and a built-in rectifying device; the silence diffuser is mainly composed of a silencer structure and a built-in diffusing device; each silencer structure includes an inner, a middle and an outer silencers of three concentric rings.The low noise local ventilator for the mine has the advantages that the silence current collector has the function of the original fan current collector while eliminating the noise in a fan inlet, the silence diffuser has the function of the original fan diffuser while eliminating noise in a fan outlet, and the silence chamber the noise radiated from the main body shell. The noise value radiatedfrom all directions of the fan is effectively reduced by the mine counter-rotating ventilator and the problem of high noise of the mine axial flow fan is successfully solved.

Description

technical field [0001] The invention relates to the technical field of mine local ventilators, in particular to a low-noise mine local ventilator. Background technique [0002] Mine local ventilators are generally composed of collectors, primary and secondary main engines, and diffusers. They are used to deliver fresh air for mine ventilation. And the eddy current noise is relatively large, which not only seriously affects the physical and mental health of workers, but also affects the mutual communication between workers, and will cause abnormal noise in the mine to not be detected in time, causing safety hazards. [0003] At present, although certain noise reduction measures have been taken for this type of fan, due to the small space in the mine, the noise of the fan measured on site is still higher than the requirements of the national "Noise Hygienic Standard for Industrial Enterprises". With the development of society, users are paying more and more attention to noise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66F04D29/54E21F1/00
CPCF04D29/663E21F1/00F04D29/541F04D29/664
Inventor 庞浩磊张楠文秀明卢前进贾乾张智浩张海红王晓辉王铁成
Owner WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
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