Dual Spool Valve Control for Aircraft Actuator Flow Demands
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Solution Overview
Problem
Existing hydraulic systems for aircraft flight control actuators face challenges in efficiently managing hydraulic fluid flow and pressure to meet varying load demands and movement rates, leading to inefficiencies and potential energy losses.
Innovation Solution
A dual spool valve system with independently movable spools in two manifolds, allowing for precise control of hydraulic fluid flow between supply and return lines, and into and out of actuators, optimizing fluid movement based on pressure and load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single spool valve is used to control hydraulic fluid flow, then the device complexity is reduced, but the ability to meet varying load demands and movement rates is insufficient
Solution Approach 1:
The valve assembly is segmented into a first spool for controlling fluid flow into the actuator and a second spool for controlling fluid flow from the actuator. Each spool can be independently positioned to control flow in its respective direction, allowing the system to meet varying load demands and movement rates while maintaining manageable complexity through functional separation.
2Speed
If hydraulic fluid is continuously supplied to the actuator, then the responsiveness of flight control members is improved, but energy losses increase
Solution Approach 1:
The valve assembly dynamically controls hydraulic fluid flow by allowing the first and second spools to be independently positioned based on real-time flight control demands. This dynamic control ensures fluid is supplied only when and where needed, improving responsiveness while minimizing energy losses by preventing continuous fluid flow.
3Productivity
If the valve assembly controls fluid flow precisely, then the efficiency of hydraulic fluid management is improved, but the device complexity increases
Solution Approach 1:
The valve assembly is divided into separate first and second spools that independently control fluid flow in opposite directions. This segmentation enables precise control of hydraulic fluid management by allowing each spool to be positioned according to specific flow requirements, improving efficiency while keeping each individual spool design relatively simple.
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 dual spool valve system enhances the efficiency of hydraulic fluid management, reducing energy losses and improving the responsiveness and control of flight control members by optimizing fluid flow according to load and rate demands, thereby enhancing aircraft performance.
Implementation Method 1
A dual spool valve system with independently movable spools in two manifolds, allowing for precise control of hydraulic fluid flow between supply and return lines, and into and out of actuators, optimizing fluid movement based on pressure and load conditions.
Data Source
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AI summary
A dual spool valve and methods of controlling hydraulic fluid that is moved to a hydraulic actuator of an aircraft. The dual spool valve may include first and second manifolds that each includes a movable spool. Multiple ports are positioned in each of the manifolds. The movable spools are positionable within their respective manifolds to control the movement of the hydraulic fluid that is supplied to and removed from the hydraulic actuator.