Wavelength adjustable noise reduction tube of centrifugal pump

Abstract

The invention discloses a wavelength adjustable noise reduction tube of a centrifugal pump and belongs to the technical field of a noise reduction technology of the centrifugal pump. The wavelength adjustable noise reduction tube which is arranged above a casing tongue of the centrifugal pump comprises a first tube body and a second tube body and also comprises a wavelength adjusting device and a sealed acoustical transmission piece; the wavelength adjusting device which is located in the first tube body is formed by an adjusting bolt and an acoustic reflection plug cock; the adjusting bolt is in threaded connection with the acoustic reflection plug cock; the acoustic reflection plug cock can vertically move along the inner wall of the first tube body to adjust the length of the noise reduction tube and maintain that the phase difference of acoustic waves and reflected acoustic waves is 180 degrees; the sealed acoustical transmission piece is located at the connecting position of the first tube body and the second tube body. According to the wavelength adjustable noise reduction tube of the centrifugal pump, the purpose of noise reduction can be achieved without major modification of a pump casing and redesign of the centrifugal pump; noise is reduced through superposition of the phase difference and the original performance of the centrifugal pump cannot be affected; the installation is simple and convenient, the appearance is attractive, the cost is low, and the practicability is high.

Description

technical field [0001] The invention belongs to the field of centrifugal pump noise reduction, in particular to an adjustable wavelength centrifugal pump noise reduction tube. Background technique [0002] Due to the complex flow inside the centrifugal pump, it is often accompanied by strong noise during operation, which not only affects the surrounding environment, but also creates potential safety hazards. With the continuous improvement of people's requirements for the living environment, the restrictions on noise are becoming more and more stringent. Therefore, reducing the noise pollution of centrifugal pumps has become an important content of noise control in places where pumps are used. There are many sources of noise in centrifugal pump systems, which are mainly divided into two categories in current research: mechanical vibration noise and flow-induced noise. Mechanical vibration noise is caused by the asymmetry and misalignment of rotating parts, such as bearings,...

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Problems solved by technology

[0010] Aiming at the need to redesign and manufacture the pump body when reducing the noise in the pump in the prior art, the improvement is relatively complicated, the cost is high and the implementation is difficult, or the pump body does not need to be redesigned and manufactured, but it still cannot scientifically and effectively solve the problem of reducing the noise of the centrifugal pump , the present invention provides an adjustable wavelength centrifugal pump noise reduction tube, which can achieve the purpose of noise reduction without extensive modification of the pump casing or redesign of the centrifugal pump, and the original performance of the centrifugal pump is not Will be affected, has the advantages of easy installation, beautiful appearance, low cost and high practicability

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