| 摘要 |
The present invention relates to a hydraulic pressing apparatus, operating with an open hydraulic circuit (31, 32, 33, 18, 16, 19, 23, 10, 15). The apparatus comprises a flywheel (22) for accumulating kinetic energy, first valve means (20) for directional control, connected to the delivery line (19), to discharge the flow of the pump (16) to the tank (31), and a first pilot line (80) for the first valve means (20). The first valve means (20) comprise: a slidable poppet (110) loaded by the pressure of the first pilot line (80). The poppet's closure force is proportional to the pilot pressure. The invention allows energy savings, high speed and reliability. |
