드라이브 ㆍ 컨트롤 (Journal of Drive and Control)

  • 제17권4호
  • /
  • Pages.87-96
  • /
  • 2020
  • /
  • 2671-7972(pISSN)
  • /
  • 2671-7980(eISSN)
유공압건설기계학회 (The Korean Society for Fluid Power and Construction Equipment)
권호 표지
DOI QR코드

DOI QR Code

변탄성 스프링을 이용한 고정밀 직동형 릴리프 밸브

High-Precision Direct-Operated Relief Valve with a Variable Elasticity Spring

  • Kim, SungDong (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
  • 투고 : 2020.10.26
  • 심사 : 2020.11.20
  • 발행 : 2020.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, a variable elasticity spring was applied to improve the pressure control precision of conventional relief valves. The equilibrium equation of the forces acting on the valve poppet was derived; it is demonstrated that matching the elastic rate of the pressure-adjusting coil spring to the equivalent elastic rate of the flow force improved the pressure override. The procedures that were used to design the variable elasticity spring are presented, and some applications of the variable elasticity spring are also introduced. Computer simulations were used to analyze three cases: a poppet-closed flow force structure, a poppet-open flow force structure with a constant elasticity spring, and a structure containing a variable elasticity spring. It is confirmed that the pressure control precision of the relief valve can be significantly improved upon by applying a variable elasticity spring to the poppet-open flow force structure.

키워드

참고문헌

  1. H. A. Khan and S.-N. Yun, "Modeling and Simulation of an EPPR Valve Coupled with a Spool Valve", Journal of Drive and Control, Vol.16, No.2, pp.30-35, 2019. https://doi.org/10.7839/ksfc.2019.16.2.030
  2. M. K. Hyun and J. Y. Huh, "An Analysis of the Dynamic Characteristics of a Spool Type Pressure Control Valve", Journal of Drive and Control, Vol.15, No.4, pp.61-66, 2018. https://doi.org/10.7839/KSFC.2018.15.4.061
  3. J. H. Yoon et al., "Simulation of EPPR Valve Flow Force Characteristic using CFD Analysis", Journal of Drive and Control, Vol.14, No.1, pp.14-22, 2017. https://doi.org/10.7839/ksfc.2017.14.1.014
  4. S. W. Kim, Y. M. Seo and H. S. Ahn, "Optimization of Poppet Shape to Minimize Override on Direct acting Relief Valve", Drive·Control 2015 Spring Conference, pp. 165-171, 2015.
  5. Ill Yeong Lee and Technique Education Business Division in Bosch Rexroth Korea, "Hydraulic Engineering", Munundang, 2nd Edition, pp.220-223 and 232-244, 2019.
  6. Robert Eugene Rennington II, "A Numerical and Experimental Investigation of Direct Acting Differential Area Relief Valves", A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Department of Mechanical Engineering, College of Engineering, University of South Florida, May 2002.