Hydraulic drive system for a construction material pump, and construction material pump
AssigneePutzmeister Engineering GmbH
InventorJan-Martin Veit
Life of this patent
Estimating the term…
Abstract
A hydraulic drive system for a construction material pump has a hydraulic circuit for hydraulic fluid, a feed pump which is designed to feed hydraulic fluid into the hydraulic circuit, at least one controllable pressure-limiting valve unit, which is designed for variable adjustment of a limit pressure of hydraulic fluid of at least one portion of the hydraulic circuit within a pressure range, and a control unit. The control unit is designed to control the pressure-limiting valve unit according to at least one operating parameter of the hydraulic drive system and/or according to the hydraulic fluid in such a way that the pressure-limiting valve unit adjusts the limit pressure of the portion of the hydraulic circuit.
Claims16
A hydraulic drive system for a construction material pump, the hydraulic drive system comprising:
- a hydraulic circuit for hydraulic fluid;
- a feed pump which is designed for feeding hydraulic fluid into the hydraulic circuit;
- at least one controllable pressure limiting valve unit which is designed for variably setting a limit pressure of hydraulic fluid of at least one section of the hydraulic circuit within a pressure range;
- a control unit which is designed to control the pressure limiting valve unit in a manner dependent on at least one operating parameter of the hydraulic drive system and/or of hydraulic fluid such that the pressure limiting valve unit sets the limit pressure of the section of the hydraulic circuit;
- and
- a cooler which is designed for cooling hydraulic fluid,
- wherein the at least one pressure limiting valve unit is designed for variably setting a cooling flow of hydraulic fluid via the cooler by setting the limit pressure, and
- wherein the control unit is designed to control the pressure limiting valve unit in a manner dependent on the at least one operating parameter such that the pressure limiting valve unit sets the cooling flow of hydraulic fluid via the cooler.
A hydraulic drive system for a construction material pump, the hydraulic drive system comprising:
- a hydraulic circuit for hydraulic fluid;
- a feed pump which is designed for feeding hydraulic fluid into the hydraulic circuit;
- at least one controllable pressure limiting valve unit which is designed for variably setting a limit pressure of hydraulic fluid of at least one section of the hydraulic circuit within a pressure range;
- a control unit which is designed to control the pressure limiting valve unit in a manner dependent on at least one operating parameter of the hydraulic drive system and/or of hydraulic fluid such that the pressure limiting valve unit sets the limit pressure of the section of the hydraulic circuit;
- at least one measuring sensor which is designed for measuring at least one property of the hydraulic drive system and/or of hydraulic fluid,
- wherein the control unit is designed for determining the at least one operating parameter in a manner dependent on the measured property, and
- wherein the at least one property is a temperature and/or a degree of contamination.
Dependencies are inferred from the claim text.