• 제목/요약/키워드: 파일럿조작 첵밸브

검색결과 1건 처리시간 0.014초

양방향펌프와 편로드실린더에 의한 리프터의 구동에 관한 연구 (Study for the Actuation of Lifter by the Bi-Directional Pump and Single-Rod Cylinder)

  • 이성래;김제민
    • 한국자동차공학회논문집
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    • 제15권4호
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    • pp.139-145
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    • 2007
  • The motion of single-rod cylinder is typically controlled by the directional control valve. In some case, the hydraulic system should be energized by the man power and at the same time the motion of a cylinder is controlled manually. It may be confusing for a man to do two things at the same time. The solution is to make up the closed hydraulic circuit with the bi-directional pump and single-rod cylinder without using a directional control valve. In the case of single-rod cylinder, the flows at the rod side and head side are so different that several valves should be installed to make the motion of single-rod cylinder possible. The hydraulic system is composed of a bi-directional pump, a single-rod cylinder, pilot operated check valves, a check valve and a counter balance valve for the purpose of actuating the lifter. The characteristics of a suggested system are analysized mathematically and numerically.