초록 ▼

A device in machines (1) which are driven by means of a hydraulic cylinder, such as hydraulic presses and the like, and which has at least one pump (5) for the hydraulic fluid which pump is driven by a driving machine (6) through an energy accumulator, for example a flywheel (7). The object of the i

A device in machines (1) which are driven by means of a hydraulic cylinder, such as hydraulic presses and the like, and which has at least one pump (5) for the hydraulic fluid which pump is driven by a driving machine (6) through an energy accumulator, for example a flywheel (7). The object of the invention is to provide a considerable energy saving and recovery of energy. This has been achieved by at least one driving unit (5) connectable to the hydraulic system in the machine, said driving unit being arranged to bring back the elastically stored energy in the machine to the energy accumulator (7) during the decompression phase of the machine.

대표청구항 ▼

An energy recovery device for machines operated by variable fluid pressure such as hydraulic presses which are driven by a hydraulic piston and cylinder means, said device further comprising: at least one hydraulic pump/motor unit for the hydraulic fluid; a motor for driving the pump; a flywheel ene

An energy recovery device for machines operated by variable fluid pressure such as hydraulic presses which are driven by a hydraulic piston and cylinder means, said device further comprising: at least one hydraulic pump/motor unit for the hydraulic fluid; a motor for driving the pump; a flywheel energy accumulator associated with said motor; an adjustment device for switching said pump/motor unit in relation to the position of the hydraulic piston after a full working cycle from pumping work to motor work at unchanged direction of rotation, so that the unit, at least during the beginning of the decompression phase of the machine, works as a motor which via the pressurized oil in the hydraulic system brings back the elastically stored energy in the machine to the flywheel.