Research on Noise Evolution Law and Influencing Factors of High-speed On/Off Valve for Unmanned Road Sweepers
The high-speed on/off valve for unmanned road sweepers exhibits significant differences in noise under different driving parameters.In order to reveal the mechanism of the influence of driving parameters on the noise of high-speed on/off valve,the relationship between the driving parameters and noise characteristics of high-speed on/of valve is first analyzed,and an electric-magnetic-fluid-structure coupling dynamic model is established.It is clarified that the driving parameters affect the noise of high-speed on/off valve by affecting the force on moving parts and the speed at the moment of collision.Secondly,a noise measurement experimental platform is built in a hydraulic semi anechoic chamber,and the noise evolution law at different driving frequencies is studied through a combination of experiments and simulations.The effectiveness of the analysis of the mechanism of the influence of driving parameters on the noise of high-speed on/off valve is verified.Finally,the influence of different driving voltages and different duty cycles on the noise sources of high-speed on/off valve has been studied.It has been found that under the same duty cycle,the noise gradually decreases with the increase of driving frequency.At the same driving frequency,the noise gradually increases with the increase of duty cycle.
high-speed on/off valvemechanical collisionvibration and noisedrive parameters
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