카운터 밸런스 밸브를 내장한 양방향 유압 브레이크 시스템 개발

Development of double acting brake system integrated counter balance valve

  • 김형의 (한국기계연구소 유공압연구실) ;
  • 이용범 (한국기계연구소 유공압연구실) ;
  • 윤소남 (부산대학교 기관학과) ;
  • 이일영 (부산대학교 기관학과)
  • 발행 : 1991.10.01

초록

A counter balance valve is used as one part of hydraulic motor brake system. The function of this valve is to protect over-run or free falling of inertia load. But occasionally the brake system with counter balance valve makes some undesirable problems such as pressure surges or vibrations. In this study, for the purpose of easy estimation about dynamic characteristics of hydraulic system including counter balance valve, precise formulation describing fluid dynamics and valve dynamics under various boundary conditions were made. Dynamic characteristics were analysed by numerical integration using Runge-Kutta method, because the equations in this circuit with counter balance valve contain various nonlinear terms. Propriety of this analysis method is verified by experiment. For the purpose of obtaining fundamental data for preventing instability, this study experimented the effects of the spool taper, spring constant, cylindrical choke. And we developed double acting brake system integrated counter balance valve.

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