| 摘要 |
<p>A flow rate control valve (11) comprises: a body (12) provided with a variable throttle (12a) on the high-pressure side, and also with a control throttle (12b) on the low-pressure side; a spool (13) for dividing the inside of the body (12) into a control chamber (12d) which connects to both the variable throttle (12a) and the control throttle (12b), and into a damper chamber (12e), the spool (13) being capable of being changed between an initial state (S) in which the variable throttle (12a) is entirely open because the spool (13) has slid within the body (12) and a control state (C) in which the variable throttle (12a) is only partially open; a pressing means (14) disposed within the damper chamber (12e) and pressing the spool (13) to the initial state (S) side; and a check valve (15) for permitting the flow of operating fluid between the inside and outside of the damper chamber (12e) when the spool (13) changes from the initial state (S) to the control state (C), and interrupting the connection between the inside and outside of the damper chamber (12e) when the spool (13) changes from the control state (C) to the initial state (S). The spool (13) is provided with a damper hole (13c) which connects the inside and outside of the damper chamber (12e).</p> |
