| 摘要 |
<p>The invention relates to a distance-dependent control valve (77), particularly for controlling a belt brake. The piston rod (65) of an hydraulic cylinder (63) is displaceable against the action of a spring (95) and connected to a control rod (45) which is applied to a belt brake (11). The control valve (77) comprises a control slider (97), the position of which within the valve is determined by an equilibrium of forces between a pressure signal and a spring force. The latter varies in dependence on the cylinder actuation. By controlling the position of the control slider (97), pressure fluid can enter in a controllable volume into the hydraulic cylinder (63) or flow out of it, in such a manner that the actuation of the hydraulic cylinder (63) is dependent on the variations of the said pressure signal. <IMAGE></p> |
