Circuit for lubricating a guide bearing of a bearing chamber
The lubrication circuit with a gyroscopic and accelerometric-controlled valve system addresses lubricant drainage issues in turbomachines, ensuring reliable lubricant drainage and reducing system size and mass under extreme aircraft attitudes.
WO2026150185A1PCT designated stage Publication Date: 2026-07-16SAFRAN AIRCRAFT ENGINES SAS
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SAFRAN AIRCRAFT ENGINES SAS
- Filing Date
- 2026-01-06
- Publication Date
- 2026-07-16
AI Technical Summary
Technical Problem
Conventional lubrication circuits in turbomachines face issues with lubricant accumulation and loss of power or leaks during extreme aircraft attitudes due to inadequate lubricant drainage, leading to pump malfunction and increased system size and mass.
Method used
A lubrication circuit with a movable valve system controlled by gyroscopic and accelerometric data, selecting the appropriate recovery port based on aircraft attitude to ensure continuous lubricant drainage using a single suction means, reducing system size and mass while maintaining robustness.
Benefits of technology
The system effectively prevents air ingress and pump malfunction, ensuring reliable lubricant drainage even under extreme conditions, minimizing system size and mass.
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Smart Images
Figure FR2026050008_16072026_PF_FP_ABST
Abstract
The invention relates to a circuit (20) for lubricating a guide bearing (16) of an aircraft turbine engine shaft (14), comprising: - at least two ports (26A, 26B) for recovering the lubricant (18) which are connected to a bearing chamber (12) and spaced apart from one another such that there is at least one possible attitude of the aircraft in which a recovery port is immersed in the lubricant while another recovery port is not immersed, - a valve (30), movable between a first opening position and a second opening position and comprising: - at least two inlets (32A, 32B) which are alternately in communication with one of the recovery ports, and - an outlet (34) which is in communication with a means (40) for suctioning the lubricant, and - a means (36) for controlling the valve, configured to select one of the recovery ports on the basis of gyroscopic and accelerometric data.
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