| 摘要 |
A hydraulic hybrid system for rotatory applications having an actuator (49, 91) in the form of a motor pump unit (91), which is coupled to a rotatory-operating device (94), such as a traction drive, and works as a consumer of hydraulic energy in one operating state of the device (94) and works as a producer of hydraulic energy in another operating state of the device (94), and having a hydraulic accumulator (1), which can be charged by the motor pump unit (91) for energy storage in the one operating state and can be discharged for energy release to the motor pump unit (91) in the other operating state, said hybrid system being characterised in that at least one hydraulic accumulator is provided in the form of an adjustable hydropneumatic piston accumulator (1) in which a plurality of pressure chambers (19, 21, 23, 25) that are delimited by active surfaces (11, 13, 15, 17) of different sizes on the fluid side of the accumulator piston (5) are formed and in that an adjusting arrangement (51) is provided, which connects a selected pressure chamber (19, 21, 23, 25) or a plurality of selected pressure chambers (19, 21, 23, 25) of the piston accumulator (1) to the actuator (49, 91) depending on the prevailing pressure level on the gas side of the piston accumulator (1) and at the actuator (49, 91). |
| 主权项 |
1. A hydraulic hybrid system for rotary applications, having an actuator (49, 91) in the form of a motor pump unit (91), which is coupled with a rotary-operating device (94), for example a traction drive, and which works as a consumer of hydraulic energy in one operating state of the device (94) and as a producer of hydraulic energy in another operating state of the device (94), whereby said hydraulic hybrid system has a hydraulic accumulator (1), which can be charged by the motor pump unit (91) for energy storage in the one operating state, and which can be discharged for energy release to the motor pump unit (91) in the other operating state, characterized in that at least one hydraulic accumulator in the form of an adjustable hydropneumatic piston accumulator (1) is provided, in which a plurality of pressure chambers (19, 21, 23, 25) are formed, which are adjacent to active surfaces (11, 13, 15, 17) of different sizes on the fluid side of the accumulator piston (5), and in that an adjustment assembly (51) is provided, which connects a selected pressure chamber (19, 21, 23, 25) or a plurality of selected pressure chambers (19, 21, 23, 25) of the piston accumulator (1) to the actuator (49, 91), depending on the respective prevailing pressure level on the gas side of the piston accumulator (1) and at the actuator (49, 91). |
