Draught fan silencing device and application of draught fan silencing device on transformer cooler draught fan

Abstract

The invention provides a silencing device used for a transformer cooler draught fan. The silencing device comprises a silencing wind tunnel, a first silencing component, a second silencing component and a silencing material. The first silencing component is arranged in the silencing wind tunnel, the second silencing component is arranged in the first silencing component, windward parts of the first silencing component and the second silencing component form a taper structure, each of the first silencing component and the second silencing component is provided with several micropores and is filled with the silencing material. According to the invention, two layers of silencing components being of taper structures are arranged creatively, the silencing wind tunnel is arranged on the periphery of the silencing components, micropores are formed in the sidewalls of the silencing components, the silencing components are filled with silencing cotton, a prevention-type structure capable of reducing high-intermediate frequency noise and a resistance-type structure capable of reducing intermediate-low frequency noise are formed, the silencing frequency band is widened, the pressure loss is reduced, air flow regeneration noise is reduced, and a good silencing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of noise reduction, and more particularly to a noise reduction device, especially a fan noise reduction device applied to a fan of a transformer cooler. Background technique [0002] The noise reduction device is an environmental protection device widely used in the prior art to reduce noise pollution. In order to meet different noise reduction requirements in different fields, there are huge differences in the structure of the noise reduction device used. The noise generated during the operation of the cooling fan used in the transformer cooler often becomes a source of disaster affecting the health of workers and disturbing the environment, especially the fans near the living area, the aerodynamic noise radiated by the air inlet and outlet is even more polluting. The main factor of the environment has formed a public nuisance, and it is also one of the main targets of noise pollution control in my country's...

AI Technical Summary

Problems solved by technology

For this technical problem in the prior art, most of the traditional or commonly used noise reduction devices are directly applied to this kind of transformer cooling fan, which not only has poor noise reduction effect, but also is inconvenient to install and use. Therefore, it needs to be specially developed for transformer cooling fans. A fan noise reduction device with good noise reduction effect, which is of great significance to reduce the pollution caused by transformer noise to the environment

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