Planet Carrier Lubrication Circuit Integration for Leak Reduction
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Solution Overview
Problem
Current mechanical reduction gears in turbomachines, particularly in aircraft turbomachines, face challenges in effectively lubricating the planet carrier, leading to increased complexity, part count, and risk of oil leaks.
Innovation Solution
Integration of independent lubrication circuits within the planet carrier cage, featuring a single-piece annular oil chambers and distributors, which simplifies production and assembly while reducing oil leak risks through optimized compactness and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional separate lubrication circuits are used for planet carrier, then lubrication coverage is improved, but device complexity and part count increase
Solution Approach 1:
The patent merges multiple separate lubrication circuits into a single integrated planet carrier structure. The planet carrier incorporates multiple oil supply conduits and chambers that deliver lubrication to different areas (satellite axes, tooth meshing points) through a unified design, reducing the number of separate components while maintaining comprehensive lubrication coverage.
Solution Approach 2:
The planet carrier serves multiple functions simultaneously: it supports satellite axes, provides lubrication pathways to satellite bearings, delivers oil to tooth meshing zones, and maintains structural integrity. This multi-functional integration eliminates the need for separate lubrication components, reducing overall device complexity.
2Device complexity
If integrated single-piece lubrication circuits are used in planet carrier, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent integrates multiple lubrication conduits and channels directly into the planet carrier body as a single-piece component. This approach reduces assembly complexity and the number of parts, though it requires precise manufacturing of the integrated pathways to ensure proper oil flow to all lubrication points.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the number of parts, simplifies assembly, and minimizes oil leaks, enhancing the lubrication efficiency and reliability of the reduction gear system.
Implementation Method 1
The invention relates to a planet carrier for a mechanical reduction gear of a turbomachine, in particular an aircraft, lubrication of a planet carrier for a mechanical gear of a turbine engine
Data Source
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AI summary
The invention relates to the lubrication of a satellite carrier (10) for a mechanical reducer (6) of a turbomachine, in particular of an aircraft, this satellite carrier comprising a cage (14) defining an internal housing intended to receive a central sun (7) with axis X of rotation, and an annular row of satellites (8) arranged around the sun, this cage comprising two radial annular walls (14a, 14b) with respect to said axis X and connected together at their external periphery by a cylindrical wall (14c) with axis X, at least one of the radial walls comprising orifices (14aa) for mounting shafts (10b) of said satellites, and the cylindrical wall comprising openings (14ca) for the passage of teeth of the satellites for their meshing with a tooth of a ring gear (9) intended to extend around the satellites and the cage.