| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve without unacceptable noise or vibration and without the cost and dynamic disadvantages of a large fluid compliance or the energy wastage with a fixed restrictor, compared to a typical variable-stroke pump.SOLUTION: A variable restrictor 110 is provided for varying the cross sectional area for a flow of fluid through a valve 102, and is movable between a first position A with a larger area and a second position B with a smaller area. Bias means 117 biases the restrictor 110 towards the second position B while opening means Fa urges the restrictor 110 against the bias 117 when the fluid flows through the valve 102, and damping means 126 damps movement of the restrictor 110 between the first and second positions and provides the resistance in accordance with increase of the velocity of movement of the restrictor 110. |
