| 摘要 |
<p>The present invention comprises an open hydraulic system (or an open system embedded in a closed system) particularly adapted to power cranes and winches. The system includes an oil tank (33), a hydraulic pump (32) driven by a drive motor (31) via a shaft, a control valve (34), a driven component (36) adapted to drive a load, and a load holding valve (35) which is connected across the driven component (36). In addition, the system includes a hydraulic recovery motor (310) mounted on the shaft from the drive motor (31) and the pump (32). When the load is released, potential energy and positional energy released by the load will drive the recovery motor (310) which in its turn will drive the drive motor (31) as a generator. In this way, the potential energy in the load can be recovered.</p> |
