Draught fan silencer

Abstract

A draught fan silencer comprises an outer wall, an inner wall, a sound insulation packing material, a supporting base, silencing interlayers, resistance type silencing sheets, lifting rings and reinforcing ribs. The supporting base is arranged at the lower end of the outer wall. The silencing interlayers are connected with the inner wall and internally provided with the resistance type silencing sheets. The lifting rings are arranged at the upper end of the outer wall. The outer wall is made of stainless steel. The sound insulation packing material is arranged between the outer wall and the inner wall. The multiple silencing interlayers are arranged in parallel at equal intervals. The reinforcing ribs are arranged on the outer wall. The draught fan silencer has the beneficial effects that air power noise generated by draught fans of various types is lowered, the silencing amount is large, the silencing band width is high, resistance loss is small, and the structure is simple, installation is convenient; the strength of a shell is enhanced through the reinforcing ribs, the overall strength of the product is enhanced, and the silencer is prevented from being scattered in the transportation or installation process.

Description

technical field [0001] The invention relates to a fan muffler. Background technique [0002] Fan is a kind of general mechanical equipment with a wide range of applications. The production of electric power, mining, machinery, metallurgy, chemical industry and other industries cannot do without fans. The noise generated by the fan during operation is often a source of disaster affecting the health of workers and disturbing the environment. Especially the fans adjacent to the living area, the aerodynamic noise radiated by the air inlet and outlet is the main factor that pollutes the environment and forms a public nuisance. A fan is a device that operates continuously. The noise standard stipulated by the International Organization for Standardization (ISO) for this type of equipment is ≤90 decibels, and the new standard in my country is the same. This is also the basis for the continuous noise of industrial enterprises to meet the standard. The noise emitted by the fan inle...

AI Technical Summary

Problems solved by technology

The noise standard stipulated by the International Organization for Standardization (ISO) for this type of equipment is ≤90 decibels, and the new standard in my country is the same. This is also the basis for the continuous noise of industrial enterprises to meet the standard. The noise emitted by the fan inlet and outlet to the environment can reach 110-120 decibels, which greatly exceeds the standard requirements. The fan muffler (Fansilencer) is the same as the exhaust pipe muffler and the drum-induced fan muffler. The principle of resistive sound absorption and noise reduction with good broadband characteristics, the principle of resistive noise reduction and sound reduction with good effects on low, intermediate and pulsating characteristics, as well as micro-perforated mufflers and impedance composite mufflers, although there are some on the market. Mufflers are applied to fans, but these mufflers have complex structures and cumbersome assembly

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