Mechanical Reducer Oil Gutter With Curved Deflector Channel
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Solution Overview
Problem
Existing gutters for mechanical reducers in aircraft turbomachines are ineffective in recovering lubrication oil, leading to oil falling back onto rotary parts and causing significant losses due to momentum transfer.
Innovation Solution
A gutter with an annular main body and a deflector featuring a curved evacuation channel that deflects oil radially outward, improving oil recovery by guiding it toward a suction point and reducing turbulence and accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gutter is used to recover lubrication oil, then the structure is simple, but the oil recovery effectiveness is insufficient and oil falls back onto rotary parts
Solution Approach 1:
The deflector incorporates a curved evacuation channel with a specific radius of curvature that matches the gutter's main body. This curvature allows the oil flow to follow a smooth arc from the inner cavity outward, preventing turbulence and oil rebound against the gutter walls, thereby improving recovery effectiveness while maintaining structural simplicity
Solution Approach 2:
The deflector extends the oil evacuation path into a three-dimensional curved trajectory rather than a straight line. The evacuation channel is positioned and shaped to guide oil radially outward from the inner cavity, utilizing spatial dimensionality to direct oil away from rotary parts and toward the suction point
2Productivity
If the evacuation channel is made straight, then the structure is simple, but oil turbulence and accumulation occur reducing recovery efficiency
Solution Approach 1:
The evacuation channel is designed with a curved profile having a radius of curvature substantially equal to the radius of the gutter's inner cavity. This curvature enables the oil to flow smoothly along the curve without creating turbulence or accumulating, thereby maintaining high recovery rates while avoiding complex multi-component structures
3Reliability
If the deflector is positioned to maximize oil collection, then oil recovery improves, but the deflector becomes oversized increasing device complexity
Solution Approach 1:
The deflector is positioned at the lower part of the gutter where oil naturally accumulates under gravity and centrifugal force. The evacuation channel is strategically located to intercept oil flow at this critical position, providing effective oil retention with a compact, localized structure rather than requiring a large-scale deflector system
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
The proposed gutter design enhances oil recovery rates and reduces losses by effectively guiding lubrication oil away from rotary parts and toward a suction point, minimizing momentum transfer and overflow.
Implementation Method 1
the lubrication and cooling oil used to lubricate the different wheels of the reducer is generally evacuated by centrifugal force by way of radial channels formed in a flange of the outer ring gear
Implementation Method 2
an evacuation channel configured to deflect oil from the main sleeve and having a curved shape such that a first end of the evacuation channel, communicating with the inner cavity, is tangent to the main body, and a second end of the evacuation channel is directed outward with respect to the annular main body
Data Source
AI summary
A gutter for recovering lubrication oil, particularly for a mechanical reducer, comprising un corps principal comprising an annular main body around a central axis, and a deflector attached to the main body and configured to allow the evacuation of the oil radially from an inner cavity of the main body toward the outside of the gutter, the deflector comprising a main sleeve disposed in the extension of the main body, and an evacuation channel configured to deflect oil from the main sleeve and having a curved shape such that a first end of the evacuation channel, communicating with the inner cavity, is tangent to the main body, and a second end of the evacuation channel is directed outward with respect to the annular main body.