| 摘要 |
A hydraulic pressure control valve includes a cylindrical valve body (1) and a valve spool (2) coaxially fitted therein, each having oil grooves (4,5) and lands (4a,5a) alternately provided on and along the respective peripheral inside and outside surfaces, the opposing oil grooves and lands forming throttles (6a,6b) whose throttling extent changes in accordance with the relative angular displacement between the valve body and the valve spool. The flow of the working oil is concentrated in wider throttles (6a) to reduce noise due to cavitation. The lands (5a) of the spool are of the same width, but the lands (4a) of the body are alternately wide and narrow to form the wider throttles (6a). <IMAGE> |
