Turbomachine Blade Incidence Control via Fluidic Pressure Balancing
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Solution Overview
Problem
Existing turbomachine blade incidence control systems are complex and require mechanical connection of routing devices with the fluidic cylinder, making them difficult to adapt for secure flight phases and prone to excursion beyond predefined positions.
Innovation Solution
A simplified turbomachine blade incidence control system using a single fluid routing device with a third inlet that communicates with the second chamber when in the protection position, inhibiting fluidic cylinder operation by balancing fluid pressures between chambers, eliminating the need for mechanical connection and reducing system complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blade incidence control system with routing devices is used to prevent blade position excursion during flight phase, then flight safety is improved, but the system complexity increases due to requiring multiple routing devices and mechanical connections
Solution Approach 1:
The invention extracts the essential protection function from the complex multi-device routing system and implements it through a single routing device with a dedicated third inlet. This third inlet is specifically designed to communicate with the second chamber when the fluidic cylinder reaches the predefined position, providing flight phase protection without requiring multiple routing devices or complex mechanical connections.
Solution Approach 2:
The single routing device is designed to perform multiple functions: it controls fluid supply to the first chamber during normal operation and simultaneously provides protection function through the third inlet when the blade reaches the predefined position. This multi-functionality eliminates the need for separate routing devices for normal operation and protection, thereby reducing system complexity while maintaining flight safety.
2Manufacturing precision
If two routing devices are used to control fluid supply to the first chamber, then blade position control is improved, but the ease of manufacture deteriorates due to increased assembly complexity
Solution Approach 1:
The invention merges the functions of two separate routing devices into a single routing device with a third inlet. This unified design integrates the fluid supply control and position protection functions into one component, eliminating the need for complex assembly of multiple routing devices and their interconnections, thereby significantly improving ease of manufacture while maintaining precise blade position control.
3Reliability
If mechanical connection of routing devices with fluidic cylinder is implemented, then position limitation is improved, but the weight increases due to additional mechanical components
Solution Approach 1:
The invention replaces mechanical connection and limitation mechanisms with a fluid-based solution. The third inlet of the routing device communicates with the second chamber through fluid pressure control, eliminating the need for mechanical linkages, levers, or physical stoppers. This substitution maintains effective position limitation while significantly reducing system weight by removing unnecessary mechanical components.
4Reliability
If multiple inlets and routing devices are used in the fluid network, then flight phase security is improved, but the manufacturing cost increases due to more components
Solution Approach 1:
The invention extracts only the essential protection function needed for flight phase security and implements it through a single routing device with a third inlet, rather than using multiple routing devices. This streamlined approach reduces the number of components that need to be manufactured, assembled, and tested, thereby lowering manufacturing costs while maintaining flight phase security.
Solution Approach 2:
The single routing device is designed to perform both normal fluid supply control and flight phase protection functions, making it a multi-functional component. This universality reduces the total component count in the fluid network, simplifying manufacturing processes and reducing overall manufacturing costs while ensuring flight phase security.
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 securely limits excursion beyond predefined positions during flight phases, simplifies the fluid circuit, reduces weight, and lowers manufacturing costs by eliminating the need for additional inlets and mechanical connections, thereby enhancing reliability and adaptability.
Implementation Method 1
a pressurised fluid network adapted to selectively supply pressurised fluid to the first and/or the second chamber with first and second fluid inlets respectively
Implementation Method 2
the routing device being adapted to set up a fluid communication between the third inlet and the second chamber through the fluid network when it is in the protection position, and to block the fluid supply to the third inlet when it is in the normal position
Data Source
AI summary
Turbomachine blade incidence control system including a fluidic cylinder with a first and a second chamber and having a pressurized fluid network adapted to selectively supply pressurized fluid to the first and/or the second chamber, the fluid network having one fluid routing device having a first normal position and a second protection position. The fluidic cylinder includes a fluid inlet positioned to be in fluid communication with the first chamber when the fluidic cylinder is in the blocked position, the routing device being adapted to set up a fluid communication between the inlet and the second chamber when it is in the protection position and to inhibit the fluid supply to the inlet when it is in the normal position.