| 摘要 |
<p>An energy-saving method and an energy-saving device for operating a single-acting cylinder device provided with a return function, which comprises a cylinder part (2) with an interior duct (50) and a piston (4) which is arranged in a movable manner in the duct (50) and which defines a working chamber (5) and a return chamber (6) in the duct (50). The piston (4) executes a working stroke and a return stroke in the duct. The method of operating the cylinder device comprises the steps of causing a first fluid to flow into the working chamber (5) from a pressure source (39), which has an output pressure, and thereby operating the working stroke of the piston (4), closing the return chamber (6), so that a second fluid in the return chamber (6) is compressed during the working stroke of the piston, and opening the working chamber (5) after the working stroke, so that the first fluid is permitted to flow out of the working chamber (5) to the atmosphere and the second fluid compressed in the return chamber (6) returns the piston (4) during the return stroke. By reducing the pressure of the second fluid in the return chamber (6) if this pressure exceeds an upper pressure value, which is the pressure reached first of either the output pressure of the pressure source (39) or a maximum pressure value, which corresponds to a maximum permissible pressure in the return chamber (6) during operation, the building up of an undesirable pressure in the return chamber (6) is avoided.</p> |
