Method for monitoring a hydraulic system
AssigneeKraussMaffei Technologies GmbH
InventorsSTEFAN MOSER, SINA GREGER-GÜRBÜZ, SEBASTIAN FRUTH
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Abstract
The application relates to a method for monitoring a hydraulic system including several hydraulic components, the hydraulic system comprising at least one pump and subsystems which can be shut off from one another and each have a hydraulic motor and/or a hydraulic cylinder as consumers. According to the application, leakage in the pump and in the subsystems is determined and, on the basis thereof, leakage in the consumers is subsequently determined. These values can be used to determine the efficiencies of the pump and the consumers.
Claims11
A method for monitoring a hydraulic system comprising several hydraulic components, comprising a source of a hydraulic fluid, at least one hydraulic pump and one or more hydraulic consumers, which are flowed through by the hydraulic fluid which is conveyed by the hydraulic pump, wherein the method comprises the following steps:
- (a) Determining the leakage of the at least one hydraulic pump as a function of the pressure via predeterminable values of the pressure;
- (b) Operation of one or more hydraulic subsystems of the hydraulic system which can be shut off from one another, and determining of the present leakage of these subsystems in the operating state, wherein a subsystem of the at least one hydraulic pump of step (a) and a consumer is formed;
- (c) Determining the leakage of the consumers of the subsystems operated according to step (b) by formation of the difference value between the leakage of the at least one hydraulic pump of step (a) and the leakage of the subsystem of step (b) which has the above-mentioned consumer,
- (d) Determining the efficiency of the components of the hydraulic system according to the steps:
- (d1) Determining the efficiency of the pump in the subsystems in the operating state, by the volume flow QactualPump, actually conveyed by the pump, calculated from the leakage of step (a), being set in relation to the volume flow Qtarget requested in the subsystem by the consumer,
- (d2) Determining the efficiency of the consumer or consumers in the operating state, by the volume flow Qconsumer actually effective for the force conversion at a particular consumer in the operating state being set in relation to the volume flow Qactual actually conveyed by the pump and delivered to this consumer, wherein the volume flow effective at the consumer in the operating state results from the leakages from steps (a) and (c) and the volume flow actually delivered by the pump in the operating state to this consumer results taking into consideration the leakage of the pump from step (a).
Dependencies are inferred from the claim text.