| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic valve capable of preventing accumulation of bubbles in a case. SOLUTION: An inlet port 24 is opened/closed by detaching/seating a valve element 26 from/on a seat part 25 by advancing/retracting a needle 20 by a solenoid (not shown) provided on the outer circumference of a case 19. A baffle 30 to shut off the communication of the needle 20 is mounted on the valve element 26, and a space 31 is formed between the baffle 30 and an inner wall of the case 19. Gas dissolved in working fluid is precipitated into bubbles by the pressure fluctuation when the working fluid flows into a valve chest 22 from the inlet port 24, the flow of the bubbles into a communication passage 28 of the needle 20 is shut off by the baffle 30, the bubbles are guided to an outlet port 23, and discharged from the valve chest 22. Bubbles are not accumulated at a bottom part of the case 19 through the communication passage 28. As a result, the self-exciting vibration of the needle 20 by the accumulation of the bubbles can be prevented. COPYRIGHT: (C)2006,JPO&NCIPI
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