Flow-induced Vibration Characteristics of Proportional Directional Valve
With the development of hydraulic technology in the direction of high speed,high pressure and high power,the problem of vibration and noise of hydraulic components becomes more and more serious,and noise pollution becomes a"bottleneck"restricting the development of hydraulic technology.As a control element commonly used in construction machinery and other fields,proportional directional valve has important practical significance for the research on vibration and noise reduction.The flow-induced vibration problem of a certain type of proportional directional valve is analyzed,and the flow field pressure pulsation characteristics,vibration characteristics,vibration and noise reduction of the proportional valve are studied.The flow field in the valve under different openings is numerically simulated,and the flow characteristics of the proportional directional valve pressure pulsation,turbulence intensity,cavitation degree and other flow characteristics are analyzed.The main frequency range of flow-induced vibration is obtained by setting the monitoring points,and compared with the natural frequency under the prestress mode analysis.The fluid-structure interaction numerical simulation of the proportional directional valve is carried out to explore the main factors affecting the vibration energy level.The vibration mechanism of proportional directional valve is summarized,and the working reliability of proportional valve is verified.
proportional directional valveflow-induced vibrationvibration and noise reductionfluid-structure couplingstructure optimization
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