| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a valve applied to an arbitrary hydraulic system containing a fluid actuator requiring a signal pressure gradually transferred to a compensation valve, and capable protecting a component of the hydraulic system and executing a high responsive pressure regulation providing consistent actuator performance with a simple, inexpensive constitution, wherein the signal pressure gradually transferred reduces pressure serge in hydraulic circuit 22. <P>SOLUTION: The valve for the hydraulic system including a pressurized fluid source, the fluid actuator and a proportional pressure compensation valve is provided. The valve has a bore in fluid communication with the fluid source and the fluid actuator. The valve has a valve element disposed in the bore and movable between a circulation shutoff position and a communication position to selectively bring the fluid source into fluid communication with the fluid actuator. The valve has a valve signal passage disposed in the valve element and in fluid communication with pressurized fluid having the signal pressure indicating pressure supplied to the fluid actuator. The valve further includes first and second orifices disposed within the valve element in fluid communication with the valve signal passage and the bore. The valve signal passage transfers the signal pressure to/from the first and second orifices in liquid communication. The first orifice is brought into fluid communication with the system signal passage by shift of the valve element from the circulation shutoff position to the circulation position before the second orifice. Both the first and second orifices are brought into fluid communication with the system signal passage when the valve element is in circulation position. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
