Electric Bypass Valve Control for Aircraft Lubricant Heat Exchangers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cooling systems for aircraft lack efficient flow control mechanisms that can dynamically regulate lubricant flow through a bypass around a heat exchanger, leading to suboptimal temperature management and potential system resonance issues.
Innovation Solution
A system incorporating a lubricant flow circuit with a bypass valve powered by a rotary electric motor, which is controlled by a sensor and controller to maintain lubricant parameters within operating ranges, allowing for dynamic regulation of lubricant flow through a bypass passage parallel to the heat exchanger passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a passive thermal valve is used to direct process fluid through a bypass around a heat exchanger, then the system structure is simple, but the flow control precision and dynamic response are insufficient
Solution Approach 1:
The patent replaces the passive thermal valve (mechanical/thermal system) with an electric motor-driven bypass valve. This substitution enables precise flow control through electrical actuation while maintaining relatively simple system structure. The electric motor provides controlled rotational movement to adjust the bypass valve opening, achieving accurate flow regulation without complex mechanical linkages.
2Temperature
If existing cooling systems are used without dynamic flow control, then the system complexity is low, but temperature management effectiveness deteriorates
Solution Approach 1:
The patent implements a feedback control system where temperature sensors monitor the process fluid temperature and feed this information to a controller. The controller adjusts the electric motor-driven bypass valve to maintain optimal temperature. This closed-loop feedback mechanism significantly improves temperature management effectiveness while keeping the overall system complexity manageable through automated control.
Solution Approach 2:
The patent introduces dynamic flow control capability through the electric motor-driven bypass valve, which can adjust its opening position in real-time based on temperature requirements. This dynamic adjustment allows the system to adapt to changing thermal conditions, improving temperature management effectiveness compared to static cooling systems.
3Reliability
If passive thermal valve systems are used, then the system is simple to operate, but system resonance issues occur
Solution Approach 1:
The patent replaces the passive thermal valve with an electric motor-driven system, which eliminates mechanical linkages that could cause resonance. The electric motor provides smooth, controlled actuation without the mechanical vibrations and resonance issues inherent in purely mechanical valve systems. This substitution improves system stability while maintaining operational simplicity through electrical control.
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 enables precise control of lubricant flow, preventing system resonance and improving temperature management by allowing for real-time adjustments to maintain lubricant parameters within desired thresholds, enhancing the efficiency and stability of the cooling system.
Implementation Method 1
The bypass valve includes a rotary electric motor
Implementation Method 2
The heat exchanger passage extends through the heat exchanger
Data Source
AI summary
A system is provided for an aircraft. This aircraft system includes a heat exchanger, a lubricant flow circuit and a bypass valve. The lubricant flow circuit includes an inlet passage, an outlet passage, a heat exchanger passage and a bypass passage. The heat exchanger passage extends through the heat exchanger. The bypass passage bypasses the heat exchanger. The heat exchanger passage and the bypass passage are fluidly coupled in parallel between the inlet passage and the outlet passage. The bypass valve is fluidly coupled inline along the lubricant flow circuit. The bypass valve is operable to regulate lubricant flow through the bypass passage. The bypass valve includes a rotary electric motor.