| 摘要 |
<p>A control block (10, 100) for controlling the flow of fluid pressure medium to a fluid pressure operated device (14), said control block having an inlet (11) for receiving a pumped supply of fluid pressure medium, an outlet (13) for delivery of fluid pressure medium from the control block for supply to the fluid pressure operated device, a flow passage (17, 18; 106) in the control block extending between the inlet and the outlet, a valve element (19, 109) arranged to control the flow through said passage, and an actuator (20, 108) coupled with the valve element and operative to move the valve element between open and closed positions with respect to the passage; a flow monitor which is arranged in the control block (10, 100) to monitor instantaneous rate of flow of fluid pressure medium to the fluid pressure operated device (14), said flow monitor issuing electrical signals representative of the instantaneous rate of flow; an electronic controller (22) which is programmed, or programmable with desired performance data for the operation of the device (14), and which is arranged to receive and to process the electrical signals from the flow monitor.</p> |
