Vibration and noise prediction method for a diaphragm pump based on the transfer matrix theory

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (18) : 329-336.

CHEN Siyu1, ZHAO Kai2, WU Haijun1

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Abstract

Diaphragm pump is power device of the household water purifier, and its vibration and noise have a negative impact on the users. Constructing an effective vibration and noise prediction method for diaphragm pumps can achieve accurate prediction of noise during the design stage of the pump, thereby reducing design costs. According to the working principle of the pump, this paper constructs a dynamic model of transverse vibration based on transfer matrix theory for the shafting of the diaphragm pump, and establishes a calculation method for the natural frequency of the shafting. With introducing the extended transfer matrix and establishing an equivalent model of the external excitation of the pump, a frequency response analysis method for the force exerted by the shafting on the pump housing under typical working conditions is developed. Taking the force as input, finite element software is used to calculate the radiated sound field of the pump housing. An experimental test of the radiated noise of the pump housing is carried out. The result shows that the average sound pressure level of the pump housing is in good consistency with the simulation results, which demonstrates the accuracy of the equivalent modeling method proposed in the paper and has guiding significance for the low noise optimization design and analysis of diaphragm pumps.

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transfer matrix theory / diaphragm pump / transverse vibration / noise analysis

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CHEN Siyu1, ZHAO Kai2, WU Haijun1. Vibration and noise prediction method for a diaphragm pump based on the transfer matrix theory[J]. Journal of Vibration and Shock, 2024, 43(18): 329-336

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