Simulation and Experimental Analysis of the Effect of Differential Pressure on the Noise of High-speed Switching Valves

doi:10.3901/JME.260509

Abstract

Abstract: The high-speed switching valve, as a new type of digital hydraulic component, is characterized by fast response and low energy consumption. However, its application is restricted by severe vibration noise and the considerable influence of differential pressure. To clarify the influence of differential pressure on the noise characteristics of high-speed switching valves and provide theoretical support for low-noise structural design, the motion behavior of the valve under electro-magnetic-fluid-solid coupling is analyzed, and a dynamic model is established. Through combined experimental and numerical studies, the fluid-induced noise mechanism is revealed. Fluid resistance to spool motion effectively attenuates mechanical noise, especially when the differential pressure is less than or equal to 3 MPa. With increasing differential pressure, intensified fluid pressure shocks give rise to prominent hydrodynamic noise, causing the overall noise level to first decrease and then increase. At low differential pressure, fluid noise mainly occupies the mid-frequency range (400-1 600 Hz), whereas under high differential pressure, both mid- and high-frequency components increase simultaneously. Additionally, fluid turbulence within the valve cavity further intensifies high-frequency noise generation.

Key words: high-speed switching valves, noises, experimentation, dropout voltage, pressure impact

CLC Number:

TH137

HUANG Hui, LEI Zhenwen, CHEN Shaorong, LI Yuzheng, SU Junshou. Simulation and Experimental Analysis of the Effect of Differential Pressure on the Noise of High-speed Switching Valves[J]. Journal of Mechanical Engineering, 2026, 62(10): 425-436.

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http://www.cjmenet.com.cn/EN/Y2026/V62/I10/425

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