Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Pressure Transfer Analysis and Experimental Verification of Thin Plate Spring Type Check Valve Considering P-delta Effect

P-delta 효과를 고려한 박판 스프링 형 체크밸브의 압력전달 해석 및 실험적 검증

  • Hwang, Yong-Ha (Department of Aerospace and Mechanical Engineering, Graduate School at KAU) ;
  • Nguyen, Anh Phuc (Department of Aerospace and Mechanical Engineering, Graduate School at KAU) ;
  • Hwang, Jai-Hyuk (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Bae, Jae-Sung (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 황용하 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 응위웬 안 푹 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 황재혁 (한국항공대학교 항공우주 및 기계공학부) ;
  • 배재성 (한국항공대학교 항공우주 및 기계공학부)
  • Received : 2018.07.18
  • Accepted : 2018.10.07
  • Published : 2018.10.31
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Abstract

In this paper, the calculation of the theoretical pressure transfer ratio due to the deformation of the thin-plate spring type check valve applied to the small piezoelectric-hydraulic pump was carried out. A thin-plate check valve is a flexible body that is deformed by an external force. The deformation of the check valve affects the rate at which the chamber pressure is transferred to the load pressure. The theoretical pressure transfer ratio for each model was calculated to compare the difference between the assumption that the thin-plate check valve is a rigid body and that of the flexible body model. The P-delta effect was considered for the calculation of the pressure transfer ratio of the flexible check valve model. In addition, a verification test for the calculated pressure transfer ratio obtained by considering the deformation of the flexible check valve model was carried out. The load pressure was measured by applying a thin-plate and ball-thin plate spring type check valves, respectively. The experimental pressure transfer ratio was calculated using the respective load pressure obtained from the experiments. The validity of the pressure transfer analysis of the check valve, taking into consideration the P-delta effect, was verified by comparing it with the theoretically calculated pressure transfer ratio.

본 논문에서는 소형 압전유압펌프에 적용된 박판 스프링 형 체크밸브의 변형에 의한 이론적인 압력전달 비율을 계산하였다. 박판 체크밸브는 외력에 의해 변형이 발생하는 유연체이며, 체크밸브의 변형은 챔버 압력이 부하 압력으로 전달되는 비율에 영향을 미친다. 박판 체크밸브를 강체로 가정하였을 때와 유연체 모델일 때의 차이를 비교하기 위해 각각의 모델에 대한 이론적인 압력 전달 비율을 계산하였고, 유연체 체크밸브 모델의 압력 전달 비율 계산을 위해 P-delta 효과를 고려하였다. 또한, 유연체 체크밸브 모델의 변형을 고려하여 계산된 압력 전달 비율의 검증 실험을 수행하였다. 실험에는 박판 스프링 형의 체크밸브와 볼-박판 스프링 형의 체크밸브를 각각 적용하여 부하 압력을 측정하였다. 실험을 통해 얻어진 각각의 부하 압력을 이용하여 실험적인 압력 전달 비율을 계산하였다. 실험으로 얻어진 결과를 이론적으로 계산된 압력 전달 비율과 비교하여 P-delta 효과를 고려한 박판형 체크밸브 압력전달 해석의 타당성을 검증하였다.

Keywords

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