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Title:
METHOD FOR MONITORING THE VOLUMETRIC EFFICIENCY OF AN HP PUMP OF A TURBOMACHINE HYDRAULIC REGULATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2013/038085
Kind Code:
A3
Abstract:
Method for monitoring the volumetric efficiency of a high-pressure pump of a turbomachine hydraulic regulation system comprising a high-pressure volumetric pump delivering a flow rate Q, dependent on an engine speed N of the turbomachine which speed is defined by a control computer, the flow being bound for an actuator that controls the variable-pitch of the turbomachine blades and for a bypass valve positioned in a turbomachine engine supply line, in which method the engines are started up at a low engine speed N0, with the valve closed, the actuator is made to move, the engine speed N is increased progressively until the flow rate Q reaches a predetermined value Q0 high enough to open the valve, the position of the actuator on the one hand, and, on the other hand, the engine speed N corresponding to the opening of the valve, then being stored in the computer and the previous steps are repeated at successive moments t1, t2, tn during the life of the engines, the high-pressure volumetric pump being replaced when the engine speed N exceeds a predefined limit value Nlimite.

Inventors:
POTEL, Nicolas (Rond-point René Ravaud-Réau, Moissy Cramayel Cedex, F-77550, FR)
GOMES, Nicolas (Rond-point René Ravaud-Réau, Moissy Cramayel, F-77550, FR)
Application Number:
FR2012/051888
Publication Date:
March 20, 2014
Filing Date:
August 13, 2012
Export Citation:
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Assignee:
SNECMA (2 boulevard du Général Martial Valin, Paris, Paris, F-75015, FR)
POTEL, Nicolas (Rond-point René Ravaud-Réau, Moissy Cramayel Cedex, F-77550, FR)
GOMES, Nicolas (Rond-point René Ravaud-Réau, Moissy Cramayel, F-77550, FR)
International Classes:
F04B51/00; F01D17/16; F01D17/18; F02C6/06; F02C7/26; F02C7/268; F02C7/27; F02C7/28; F02C9/18; F02C9/22; F04D27/02; F04D29/56
Foreign References:
FR2923871A1
FR2942001A1
EP1785348A2
EP1798400A2
EP1138933A2
Attorney, Agent or Firm:
DAVID, Alain et al. (Cabinet Beau de Loménie, 158 rue de l'Université, Paris Cedex 07, F-75340, FR)
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