| 摘要 |
PROBLEM TO BE SOLVED: To smoothly and surely bring a valve element into contact with a valve seat by moving the valve element as a valve rod moves, thereby securely opening and closing a valve. SOLUTION: In the solenoid valve (booster control valve) 30 of an actuator A for hydraulic control, the valve rod 35 which is integrally formed with a movable core 34 is advanceably and retreatably arranged in a valve housing 36, and the valve element 37 is brought into contact with and separated from the valve seat 38 by the advance and retreat movement of the valve rod so as to open and close the valve. The valve element is formed integrally with the valve rod for opening and closing the valve. A guide for the valve element is provided in the valve seat. In case of guiding the valve element 37 to the valve seat 38a by the guide, even when a line of movement c<SB>1</SB>of the valve element determined by a movement axial line of the valve rod does not slightly coincide with the center line c<SB>2</SB>of the valve seat, the valve element 37 is smoothly guided to the valve seat by the guide so that the valve element smoothly comes into contact with the valve seat. Because a flow channel 42 extending from the valve seat to a circulation hole 15a of a housing 36a is formed in the guide, the fluid flow b is not disturbed. COPYRIGHT: (C)2007,JPO&INPIT
|
