Low noise centrifugal pump

A centrifugal pump, low-noise technology, used in pumps, pump components, non-variable-capacity pumps, etc., can solve the problems of difficult installation and fixation of membranes, unsuitable for engineering applications, unstable membranes, etc., to achieve stable and reliable structure and reduce broadband. Effects with flow noise and simple implementation

Active Publication Date: 2013-05-08
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to install and fix the film in this structure, and when the fluid moves fast, the film itself is unstable and may vibrate, which is not suitable for engineering applications

Method used

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  • Low noise centrifugal pump
  • Low noise centrifugal pump

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Embodiment

[0022] Such as figure 1 Shown is part of the pump inlet 4 of one embodiment of the present invention. The implementation structure of centrifugal pump flow noise control consists of volute 1, impeller 2, rubber layer 3 and shaft 6. The increased width and radius of the volute 1 is filled with rubber, the position of the inner edge of the rubber is determined by the hydrodynamic characteristics of the design of the centrifugal pump.

[0023] Such as figure 2 Shown is part of the pump outlet 5 of this embodiment of the invention. and figure 1 Similarly, the increased width and radius of the volute 1 are filled with rubber to partially offset the radiated noise on both sides of the impeller 2 .

[0024] In this embodiment, although rubber or polyurethane is used as the acoustic filling material, the filling material of the present invention is not limited to these two, and other materials that meet the requirements may also be used.

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Abstract

The invention relates to a low noise centrifugal pump which comprises a volute and an impeller. The low noise centrifugal pump is characterized in that the width and the radius of the volute are enlarged and enlarged space is filled with acoustic materials which are made from rubber or polyurethane; the inner wall of the acoustic materials is attached to the impeller; and the inner edge position of a rubber layer is determined by fluid dynamics characteristics of the design of the low noise centrifugal pump. In low frequency, the filled acoustic materials in an enlarged position can effectively enable acoustic waves to be smoothly spread to enable fluid not to pass through and accordingly an acoustic self-cancellation channel between two monopoles is established to enable a same-amplitude and reversed-phase radiation noise part on the bilateral sides of the impeller to be canceled out. In medium-high frequency, damping of the filled acoustic materials in the enlarged position can convert acoustic energy into heat energy to enable the acoustic energy to be attenuated. The low noise centrifugal pump has the advantages of being simple in implementation process, stable and reliable in structure and capable of reducing flow noise of broadband of the low noise centrifugal pump based on guaranteeing hydrodynamic parameters of the low noise centrifugal pump.

Description

technical field [0001] The invention relates to the flow noise control technology of a centrifugal pump, in particular to a new low-noise centrifugal pump, which controls the flow noise of the centrifugal pump by combining the acoustic self-cancellation principle and the sound absorption effect of materials. Background technique [0002] Existing centrifugal pumps have strong flow noise, which is an important noise source of the pipeline system, which not only affects the workplace and surrounding environment, but also seriously affects people's physical and mental health and work efficiency. [0003] At present, there are mainly three ways to control pipeline noise: installing mufflers, laying sound-absorbing materials, and active control. In order to reduce the flow noise of fluid machinery, people generally install noise reduction equipment such as mufflers in the pipeline system. However, due to the long sound wave in water and the size limitation, the muffler cannot eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66
Inventor 张浩周城光刘碧龙刘克
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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