The influencing factors of noise caused by mechanical collision for high-speed switch valve considering multiple physical fields

The high-speed switch valve (HSV) is affected by the coupling of electric-magnetic-fluid-solid multiple physical fields, resulting in unclear noise variation patterns and inability to determine the direction of noise reduction. In response to these issues, this article first analyzes the relationship between multi effect coupling and noise characteristics of HSVs, and identifies the key factors affecting the noise of HSVs. Secondly, a noise model for HSVs is established. The characteristics of noise generated by mechanical collisions under high-frequency noise are analyzed. Subsequently, the noise variation patterns with different duty cycles at the same frequency are analyzed experimentally. Finally, the influence of key parameters such as collision speed and material on noise is analyzed. The results indicate that as the duty cycle increases, the noise increases. The duty cycle only affects the noise when the valve core is closed. When the opening of the valve port is small, materials with higher elastic modulus should be selected. When the opening of the valve port is large, materials with lower elastic modulus should be selected.