Measuring system for centrifugal pump flow induced noise

Abstract

The invention provides a measuring system for centrifugal pump flow induced noise. The measuring system for the centrifugal pump flow induced noise is reliable and stable in measuring performance, has completeness and is extensively applied to the field of fluid flow noise measurement. The measuring system for the centrifugal pump flow induced noise comprises a centrifugal pump and a noise signal acquisition system, and is structurally characterized in that one end of the centrifugal pump is connected with a pressure equalizer I which is connected with a cavitation cylinder, the other end of the centrifugal pump is connected with a pressure equalizer II which is connected with a diffusion pipe, the diffusion pipe is connected with a pressure stabilizing cylinder, flowmeters I are arranged in the pressure equalizers, and a butterfly valve I is arranged in the diffusion pipe; a straight pipe section is further connected between the cavitation cylinder and the pressure stabilizing cylinder and is in cross and communicating connection with the pressure equalizers, and a flowmeter II and butterfly valves II are arranged in the straight pipe section; the noise signal acquisition system is connected with the centrifugal pump.

Description

technical field [0001] The invention belongs to the technical field of energy conversion devices for centrifugal pumps, and in particular relates to a measurement system for flow-induced noise of centrifugal pumps. Background technique [0002] As an important energy conversion device and general machinery, centrifugal pumps are widely used in various sectors of the national economy and high-end scientific and technological fields such as aerospace. The noise generated by centrifugal pump operation includes mechanical noise and internal flow induced noise. Flow-induced noise refers to the radiation noise caused by the interaction between the moving fluid and the solid boundary and the turbulent flow inside the fluid; the main excitation mechanism is: the internal stress and pressure disturbance of the fluid caused by the relative motion of the solid and the fluid and the irregular motion of the fluid itself transfer in the medium. [0003] With the development of society a...

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Problems solved by technology

[0006] Theoretical and experimental research on flow-induced noise inside centrifugal pumps has increasingly become the focus and focus of pump industry research in developed countries such as the United States, the United Kingdom, and Japan. Some empirical or semi-empirical conclusions have been obtained, but there are no widely applicable theoretical or empirical formulas. , and there is no relatively mature detection equipment to analyze flow-induced noise

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