Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Simulation of EPPR Valve Flow Force Characteristic using CFD Analysis

CFD를 이용한 EPPR 밸브 유동력 특성 분석 및 시뮬레이션

  • Received : 2016.11.29
  • Accepted : 2017.02.02
  • Published : 2017.03.01
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Abstract

Flow force is the additional unbalanced force acting on the valve spool by fluid flow, excluding the static pressure force that is offset on the spool land wall at the same magnitude. When designing the valve spool, it is assumed that the same average value of static pressure is applied to the inlet and outlet spool land wall in one chamber. However, the high velocity of the fluid flow by the inlet or outlet metering orifice creates unbalanced pressure distribution and generates additional force in the opposite direction to that of the solenoid attraction force. This flow force has a negative effect on the control performance of the EPPR valve, which needs to develop uniform output pressure along the entire spool control range. In this study, we developed a 3D model of the EPPR valve and conducted flow force characteristic analysis using CFD S/W (ANSYS FLUENT). The alleviated flow force model was derived by adjusting the design parameters of the spool notch.

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References

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Cited by

  1. Independent Metering Valve: A Review of Advances in Hydraulic Machinery vol.17, pp.4, 2017, https://doi.org/10.7839/ksfc.2020.17.4.054
  2. 변탄성 스프링을 이용한 고정밀 직동형 릴리프 밸브 vol.17, pp.4, 2017, https://doi.org/10.7839/ksfc.2020.17.4.087