Abstract
In order to study the thermal effect and noise of cavitation in hydraulic cone type throttle valve, a cone type throttle valve cavitation experiment platform is built. With the organic glass having a better transparency as the material, the model valve was made. The pressure characteristics of five kinds of spool case cone type throttle valves were analyzed through simulation and experimental study, and the main production parts of cone type throttle valve cavitation bubble were obtained. The results show that the frequency of cone type throttle valve noise is above 8kHz. On this basis, we can determine whether the cone type throttle valve noise is the main source of noise in hydraulic system by measurement of noise spectrum. Based on the above findings, it is concluded that it is helpful for fault diagnosis of hydraulic system. The cavitation has relatively great impact on the hydraulic oil temperature flowing through the throttle valve, and its impact cannot be ignored.
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