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Abstract: The poppet valve is a fundamental component in fluid power systems. Under particular conditions, annoying “squeal” noises may be generated in hydraulic poppet valves. In the present study, the frequency spectrum of the squeal noise is obtained by analyzing the sampling data from the accelerometer mounted on the valve body. It is found that the flow velocity, pressure, and structural parameters have crucial effects on the properties of squeal noise, especially frequency. Larger valve chamber volume or lower backpressure leads to lower fundamental frequency of the squeal noise. An explanation for the squeal noise, as a result of helmholtz resonance, is suggested and proved by experimental results.

Noise analysis is not new in the scientific panorama, but the application in poppet valve is interesting. The results are interesting, and the explanations with regard to cavitation are plausible.

液压锥阀中的啸叫噪声

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