Reduction Gear Oil Recovery Gutter With Multi-Outlet Evacuation
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Solution Overview
Problem
Conventional oil recovery gutters in turbomachine reducers are prone to clogging, causing oil to return to the gearbox, which disrupts the dynamic behavior and efficiency of the gearbox.
Innovation Solution
An oil recovery gutter with multiple radially oriented evacuation openings around the axis, designed to maximize oil evacuation and minimize return to the gearbox, featuring varying radial dimensions, curved profiles, and chamfered edges for efficient oil flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous gutter extending around the crown with a single outlet is used, then oil recovery is facilitated, but the gutter becomes clogged causing oil to return to the reducer
Solution Approach 1:
The single outlet is divided into multiple outlets (at least two, preferably three or more) distributed around the gutter perimeter. This segmentation prevents oil accumulation and clogging by providing multiple discharge paths, thereby maintaining reliable oil recovery while eliminating the harmful clogging effect.
Solution Approach 2:
Each outlet is equipped with specific geometric features including chamfered edges and curved profiles tailored to local flow conditions. These localized quality enhancements optimize oil discharge at each specific outlet position, preventing clogging while maintaining effective oil recovery throughout the gutter.
2Productivity
If multiple discharge openings are implemented, then oil evacuation is maximized, but device complexity increases
Solution Approach 1:
Multiple outlets are integrated into a single continuous gutter structure rather than separate components. The outlets are formed as integral features of the gutter body through casting or forming processes, merging the function of multiple discharge points into one unified structure. This maintains high oil evacuation capability while avoiding the complexity of assembling multiple separate outlet components.
Solution Approach 2:
The gutter structure serves multiple functions simultaneously: it collects oil from the crown, transports it through its circumferential path, and discharges it through multiple outlets. The same structural elements (chamfers, curved profiles) serve both aesthetic/manufacturing purposes and functional oil flow optimization, reducing overall device complexity.
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 design significantly reduces oil return to the gearbox, enhancing the dynamic behavior and efficiency by effectively evacuating oil through multiple openings with optimized geometry and orientation.
Implementation Method 1
The oil is usually injected into the reducer via various nozzles and then ejected around the periphery of the crown under the effect of centrifugal force.
Data Source
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AI summary
Oil recovery gutter (17) for a turbomachine reducer, the gutter (17) being intended to be arranged around and opposite oil ejection means formed in a ring of the reducer, the gutter (17) extending around an axis and being open towards the axis in order to recover the ejected oil, the gutter (17) being a ring having a bottom wall (18) delimited by two axial end walls (19) arranged axially opposite each other; characterized in that the bottom wall (18) of the gutter (17) comprises several oil evacuation openings (20) each configured to evacuate oil recovered by the gutter (17), each opening (20) projecting radially outwards so as to open radially outside the gutter (17) and having a circumferential orientation with respect to the axis (X), the openings (20) preferably being distributed regularly around the axis (X).