| 摘要 |
<p>PROBLEM TO BE SOLVED: To save energy and at the same time reduce the temperature increase of oil by utilizing hydraulic energy effectively. SOLUTION: The accumulator-testing device is provided with a solenoid switching valve 7 that is connected to accumulators 4 and 5 under test, a pressurized pipe 20 for forcibly feeding oil W in a tank 11 to the switching valve 7 via a main pump 2, a pressure-discharging pipe 25 for leading oil that is discharged from the switching valve 7 into a tank 1, a hydraulic motor 14 that is provided at the pressure-discharge pipe 25, a sub pump 15 that is driven by the hydraulic motor 14 and forcibly sending oil in the tank to the pressurized pipe 20, and pressure switches 6 and 16 for detecting the pressure of accumulators 4 and 5, and controlling the switching valve 7.</p> |
