Abstract
In an oil-pressure circuit with conventional flow control valves jumping or shock often occurs when the actuator starts or stops, which causes much trouble such as damage to driven tools or works.
In this study a new-type flow control valve mechanism was presented to eliminate such jumping or shock motion. Analytical study revealed its characteristics better than conventional ones. A sample valve was manufactured and tested. Experimental results also revealed much smoother motion of the hydraulic cylinder.
In this valve a throttle valve and a compensator are separated, the former being connected to the meter-in line and the latter to the meter-out line, so that the latter may be always in operating condition. The opening area of the throttle valve is not fixed but is increased slowly to its final value.
