Piston pump and method for operating a piston pump
AssigneeSchwing GmbH
InventorsAndreas Lehmann, Friedrich Schwing
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for operating a piston pump with a differential cylinder drive (1) with at least two differential cylinders (2, 3) for driving at least two conveying pistons movable in conveying cylinders, each conveying piston being driven via an associated differential cylinder (2, 3) of the differential cylinder drive (1) for operating the piston pump, with a hydraulic circuit (4) for driving the differential cylinder drive (1) by the action of hydraulic fluid. The invention also relates to a piston pump for carrying out the method.
Claims22
1-22. (canceled)
A method for operating a piston pump with a differential cylinder drive with a first differential cylinder and a second differential cylinder for respectively driving a first conveying piston and a second conveying piston respectively movable in a first conveying cylinder and a second conveying cylinder, the first conveying cylinder being driven via the first differential cylinder of the differential cylinder drive, the second conveying cylinder being driven via the second differential cylinder of the differential cylinder drive, with a hydraulic circuit for controlling the differential cylinder drive and/or for driving the differential cylinder drive by action of hydraulic fluid, the method comprising the following cyclically performed steps:
- suctioning material to be conveyed via the first conveying cylinder by driving the first differential cylinder and simultaneously discharging material to be conveyed via the second conveying cylinder by driving the second differential cylinder;
- pre-compressing the sucked-in material via the first conveying cylinder by driving the first differential cylinder and simultaneously discharging material via the second conveying cylinder by driving the second differential cylinder;
- discharging material via the first conveying cylinder by driving the first differential cylinder and simultaneously suctioning material to be conveyed via the second conveying cylinder by driving the second differential cylinder;
- and
- discharging material via the first conveying cylinder by driving the first differential cylinder and simultaneously pre-compressing the sucked-in material via the second conveying cylinder by driving the second differential cylinder.
A piston pump comprising:
- a differential cylinder drive with first and second differential cylinders that are configured and arranged to drive respective first and second conveying pistons that are movable in respective first and second conveying cylinders, each of the first and second conveying pistons arranged to be driven via respective first and second differential cylinders for operating the piston pump, a hydraulic circuit is configured to control the differential cylinder drive and/or to drive the differential cylinder drive by the action of hydraulic fluid.
Dependencies are inferred from the claim text.