| 摘要 |
PURPOSE:To prevent a hydraulic control device from deterioration in its load responsiveness with varying rate-of-flow gain due to change in the discharge pressure of a hydraulic pump, wherein the load is such a one as driven by a servo valve. CONSTITUTION:A pressure sensor 2 is furnished in a pipeline 15 which is a supply line leading to a servo valve 7, and the amplification gain of a variable gain servo amplifier 5 is adjusted in accordance with the rate-of-flow gain varying with pressure change, and it is made practicable to supply a working oil with a rate of flow in conformity to a command value given by a command signal output device 6. |
