변탄성 스프링을 이용한 고정밀 직동형 릴리프 밸브

다국어 초록 (Multilingual Abstract)

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.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 변탄성 스프링과 포핏 힘 평형
• 3. 변탄성 코일 스프링 설계 방법 및 절차
• 4. 적용 사례
• 5. 결론
• References

참고문헌 (Reference)

1 문강현, "스풀형 압력제어밸브의 동특성 해석" 사단법인 유공압건설기계학회 15 (15): 61-66, 2018

2 S. W. Kim, "Optimization of Poppet Shape to Minimize Override on Direct acting Relief Valve" 165-171, 2015

3 Haroon Ahmad Khan, "Modeling and Simulation of an EPPR Valve Coupled with a Spool Valve" 사단법인 유공압건설기계학회 16 (16): 30-35, 2019

4 Ill Yeong Lee, "Hydraulic Engineering" Munundang 220-223, 2019

5 윤주호, "CFD를 이용한 EPPR 밸브 유동력 특성 분석 및 시뮬레이션" 사단법인 유공압건설기계학회 14 (14): 14-22, 2017

6 Robert Eugene Rennington II, "A Numerical and Experimental Investigation of Direct Acting Differential Area Relief Valves" University of South Florida 2002