Curved Deaeration Conduit for Centrifugal Air-Oil Separation
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Solution Overview
Problem
Existing deaeration systems in engine lubrication systems, particularly in aircraft engines, face challenges in optimizing separation efficiency while minimizing maintenance, weight, and cost, as they rely on static reservoirs which are not practical in dynamic environments and may not effectively separate air from oil using centrifugal acceleration.
Innovation Solution
A deaeration system comprising a rotatable deaeration rotor and a deaeration conduit with a splitter and curved inlet, which utilizes centrifugal acceleration to separate air from oil by routing the air-oil mixture through a curved conduit and rotor passages, enhancing separation efficiency and reducing the need for a large static reservoir.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a static reservoir is used for deaeration, then the system is simple in structure, but separation efficiency is insufficient in dynamic engine environments
Solution Approach 1:
The patent transitions from a static reservoir to a dynamic deaeration rotor that rotates at high speed. The rotor creates centrifugal forces that actively separate air from oil, making the system adaptable to dynamic engine environments while maintaining high separation efficiency.
Solution Approach 2:
The patent changes the operating parameters by introducing rotational speed as a key variable. The deaeration rotor operates at specific RPM ranges to generate sufficient centrifugal acceleration for effective separation, transforming the deaeration process from passive gravitational separation to active centrifugal separation.
2Reliability
If a deaeration rotor is used to actively separate air from oil, then separation efficiency is improved, but device complexity and maintenance needs increase
Solution Approach 1:
The deaeration system is segmented into distinct functional components: the deaeration rotor for separation, the conduit for fluid transport, and the splitter for flow distribution. This modular segmentation allows each component to be optimized independently and simplifies maintenance by isolating wear-prone elements.
Solution Approach 2:
Instead of trying to separate air from oil in a static container, the patent inverts the approach by using a rotating rotor where the oil and air are forced outward by centrifugal force, with air escaping through specially designed passages while oil is collected separately. This inverted separation mechanism achieves high efficiency with simpler overall system architecture.
3Reliability
If centrifugal acceleration is used for deaeration, then separation efficiency is maximized, but weight of rotating components increases
Solution Approach 1:
The deaeration rotor employs curved surfaces and rotational geometry to generate centrifugal forces. The curved pathways in the rotor and conduit optimize fluid flow patterns, allowing efficient separation with minimized material usage and reduced rotor weight while maintaining the necessary centrifugal acceleration.
4Productivity
If the conduit inlet extends away from the splitter in a curved manner, then flow distribution is optimized, but manufacturing complexity increases
Solution Approach 1:
The conduit inlet features a curved extension that optimizes flow distribution into the rotor. This curvature is designed to match the rotational flow patterns, improving separation efficiency. The curved geometry can be manufactured using standard forming techniques, balancing performance optimization with manufacturing feasibility.
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 system effectively separates air from oil, improving separation efficiency, reducing maintenance needs, and minimizing weight and cost by leveraging centrifugal forces to enhance the separation process in dynamic engine environments.
Implementation Method 1
it may not be practical to base a deaerating strategy solely on usage of a static reservoir. Such considerations can favor the use of a deaerator to actively separate the air from the oil using centrifugal acceleration.
Implementation Method 2
A deaeration system comprising a rotatable deaeration rotor and a deaeration conduit with a splitter and curved inlet, which utilizes centrifugal acceleration to separate air from oil by routing the air-oil mixture through a curved conduit and rotor passages
Data Source
AI summary
A deaeration system for an engine lubrication system, the deaeration system comprising: a deaeration rotor rotatable about an axis and including: a rotor inlet extending circumferentially around the axis, a first and a second rotor outlet, a first rotor passage in fluid communication between the rotor inlet and the first rotor outlet, and a second rotor passage in fluid communication between the rotor inlet and the second rotor outlet in parallel to the first rotor passage; and a deaeration conduit including: a conduit inlet, a splitter downstream of the conduit inlet relative to a flow of lubricant through the deaeration conduit, a first conduit outlet and a second conduit outlet downstream of the splitter, the first conduit outlet in fluid communication with the rotor inlet, the conduit inlet having a curved portion extending away from the splitter.