Method for operating a hydraulic drive device and method of operating the same
AssigneeVoith Patent GmbH
InventorBert Brahmer
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for operating a hydraulic drive device comprising a hydraulic piston-cylinder unit having a working piston that can be moved in a working direction between an upper dead point and a lower dead point, a set point for the position of the working piston in the working direction being predefined, and an actual value of the position of the working piston in the working direction being interrogated, and the movement of the working piston being regulated as a function of the set point and the actual value. The invention additionally relates to a hydraulic drive device.
Claims13
A method for operating a hydraulic drive device (10) comprising
- moving a working piston of a hydraulic cylinder between an upper dead point and a lower dead point;
- defining a set point for the position of the working piston;
- determining an actual value of the position of the working piston;
- regulating the movement of the working piston as a function of the set point and the actual value
- performing a double stroke of the working piston by starting from the upper dead point,
- defining the set point at a lower overcontrol position below the lower dead point
- reversing the movement of the working piston when the actual value reaches a changeover value above the lower dead point, by defining the set point at an upper overcontrol position above the upper dead point and,
- defining the set point at the upper dead point when the actual value reaches a fixed switching value below the upper dead point.
A hydraulic drive device comprising
- a hydraulic piston-cylinder unit having a working piston (16) that can be moved between an upper dead point and a lower dead point,
- a setting device to define a set point for the position of the working piston,
- control feedback which interacts with the setting device to define the set point as a function of an actual value of the position of the working piston, where the setting device defines
- the set point at a lower overcontrol position below the lower dead point
- an upper overcontrol position above the upper dead point,
- a changeover value above the lower dead point and
- a fixed switching value below the upper dead point,
- the control feedback interacts with the setting device in such a way that when the actual value reaches the changeover value, the set point is define at the upper overcontrol position, and that when the actual value reaches the fixed switching value from the direction of the lower dead point, the set point is defined at the upper dead point.
Dependencies are inferred from the claim text.