Centrifugal fan volute employing granular damping vibration attenuation

Abstract

The invention discloses a centrifugal fan volute employing granular damping vibration attenuation. The centrifugal fan volute comprises a volute body, wherein the volute body is provided with an air inlet (4); a centrifugal fan (7) is arranged in the volute body and is driven by a motor (8). The centrifugal fan volute is characterized in that the volute body consists of an inner volute (1) and an outer volute (2); a vibration attenuation and noise reduction chamber is formed between the inner volute (1) and the outer volute (2) and is filled with damping vibration attenuation granules (6). According to the centrifugal fan volute, the chamber between the inner volute and the outer volute is filled with spherical granules, the non-elastic collision and the friction between the granules and between each granule and the wall of the chamber are caused by the vibration of the inner volute, the energy is consumed, and the aim of vibration attenuation is achieved; meanwhile, the radiation noise of the volute can be reduced. The centrifugal fan volute can be applied to the industrial fields of energy power, petrochemical industry, petrochemical industry and the like, and the field of national defense and military industry.

Description

Technical field [0001] The invention relates to gas conveying equipment, and more specifically to a centrifugal fan volute which can be widely used in the fields of energy and power, petrochemical industry, metallurgy, national defense and the like. Background technique [0002] Centrifugal fan is a large-scale and wide-ranging mechanical equipment. It is widely used in energy and power, petrochemical, metallurgical and other industrial fields and various military ships, especially in the ventilation and air conditioning systems of various ships. Plays an extremely important role. The fan volute is a thin-walled container structure. The pressure pulsation formed by the interaction between the gas flow and the volute wall will cause the volute to produce greater vibration and radiate noise, which will affect the work and rest of the station personnel and reduce the service life of the equipment. Passing to the feet of the equipment installation will affect the ship's acoustic inv...

AI Technical Summary

Problems solved by technology

The volute of the fan is a thin-walled container structure. The pressure pulsation formed by the interaction between the flow of the gas and the wall of the volute will cause the volute to generate large vibrations and radiate noise, which will affect the work and rest of the station personnel, reduce the service life of the equipment, and cause vibration. Transmitting to equipment mounting feet will affect the acoustic stealth of the ship

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