Method for monitoring a fluid system lubricating a mechanical system
AssigneeAirbus Helicopters
InventorsMathieu Charrier, Sylvain Berthalon, Jerome Belmonte
Life of this patent
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Abstract
A method for monitoring a fluid system for lubricating a mechanical system. The fluid system comprises a spraying circuit connected to a main fluid circuit and to a back-up fluid circuit. The back-up fluid circuit comprises a back-up check valve closed in a nominal operating mode. The method comprises a monitoring phase comprising the generation of a first alert in the presence of the detection of a malfunction making the main fluid circuit inoperative and the back-up check valve in an open state and the generation of a second alert different from the first alert in the presence a malfunction and the back-up check valve in a closed state.
Claims15
A method for monitoring a fluid system for lubricating a mechanical system, the fluid system comprising a tank containing a lubricating fluid inside a casing of the mechanical system, the fluid system comprising a spraying circuit provided with at least one sprinkler, the fluid system comprising a main fluid circuit extending from the tank to the spraying circuit, the fluid system comprising a back-up fluid circuit extending from the tank and joining the spraying circuit, the back-up fluid circuit comprising a back-up check valve configured to be either in a closed state preventing the lubricating fluid from flowing or in an open state allowing the lubricating fluid to flow from the tank to the spraying circuit, the back-up fluid circuit being dimensioned such that the back-up check valve is in the closed state in a nominal operating mode, the method comprising a monitoring phase comprising the following steps:
- detection of a malfunction by monitoring at least one monitoring parameter, the malfunction making the main fluid circuit inoperative;
- and
- detection that the back-up check valve is in the open state or the closed state;
- wherein the monitoring phase comprises the following steps:
- generation of a first alert in the presence of the detection of the malfunction and the detection that the back-up check valve is in the open state;
- and
- generation of a second alert different from the first alert in the presence of the detection of the malfunction and the detection that the back-up check valve is in the closed state.
Dependencies are inferred from the claim text.