| 摘要 |
<p>PURPOSE:To aim at energy saving, by constituting liquid supply paths leading to hydraulic driving devices of hydraulic circuits with two or more systems of different pressures. CONSTITUTION:Hydraulic driving devices 1 and a hydraulic supply 2 are connected together, by a high pressure path 3 which is a path for an actuation liquid discharged from the hydraulic supply 2 under a high pressure, a low pressure path 4 which is a path for the actuation liquid discharged from the hydraulic supply 2 under a low pressure, and a return path 5 which is a path for return of the actuation liquid ejected from the hydraulic driving devices 1 respectively. Thus, when differences among pressures required by the hydraulic driving devices 1 are big, the actuation liquid in a liquid path having an optimum pressure out of the supplying liquid paths 3 or 4 of two or more systems of different pressures is supplied to the hydraulic driving devices 1 depending on required pressures so that a pressure difference between the supplied liquid pressure and the required liquid pressure by the hydraulic driving devices 1 is lessened and thus a waste consumption of energy can be eliminated.</p> |
