| 摘要 |
<p>A hydraulic system (10) that includes a rotating group (600) with a plurality of fluid chambers and a plurality of valve sets that valve a corresponding one of the fluid chambers is disclosed. The hydraulic system may function as a hydraulic transformer (26). The hydraulic system may transfer energy between a high pressure fluid supply (12,720) (e.g., from a pump), an accumulator (34,734), a hydraulic component (e.g., a hydraulic cylinder, a hydraulic motor, and/or a hydraulic pump-motor), and/or an input/output shaft (36,736). The hydraulic system may include a single rotating group with a common axis. Each of the valve sets may include a first valve (670s) that fluidly connects to the pump, a second valve (670t) that fluidly connects to a tank, a third valve (670a) that fluidly connects to the accumulator, and a fourth valve (670x) that fluidly connects to the hydraulic component. The valves may have a valving period set to less than half or one- third of a rotational period of the rotating group. The valves may have a frequency of greater than 100 Hertz and may be digitally controlled.</p> |
