Variable Stator Vane Control System Preventing Mechanical Interference
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Solution Overview
Problem
Gas turbine engines face mechanical interference between variable stator vanes and rotor blades, leading to potential component damage and significant downtime due to overextension or closure, which existing control systems fail to prevent effectively.
Innovation Solution
A variable stator vane control system utilizing hydraulic actuators and electric trimmer motors, managed by a controller with resolver feedback, to precisely control vane angles and prevent interference by adjusting actuator positions and trimmer motor operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If variable stator vanes extend too far open or closed to optimize airflow, then airflow control is improved, but mechanical interference with rotor blades occurs causing component damage
Solution Approach 1:
The control system performs preliminary action by detecting the angular position of variable stator vanes and predicting potential mechanical interference with rotor blades before it occurs. The controller proactively adjusts the vanes to a safe position or alerts the operator, preventing component damage while maintaining optimized airflow control within safe operational limits.
Solution Approach 2:
The system implements feedback by using resolvers to continuously detect the angular position of variable stator vanes and feeding this information back to the controller. The controller compares the detected position against predetermined safe positions and takes corrective action or alerts the operator, ensuring the vanes remain within safe operational ranges that prevent mechanical interference with rotor blades.
2Reliability
If mechanical interference is prevented by limiting vane movement, then component damage is avoided, but airflow optimization is reduced
Solution Approach 1:
The system applies parameter changes by dynamically adjusting the angular position of variable stator vanes within predetermined safe ranges. The controller modifies the vane angle parameter based on detected position and operational conditions, allowing maximum airflow optimization while ensuring the vanes do not extend to positions that would cause mechanical interference with rotor blades.
3Strength
If extensive repair is required after mechanical clashing, then component durability is maintained, but system downtime increases significantly
Solution Approach 1:
The control system performs preliminary action by continuously monitoring vane position and predicting potential mechanical interference before it occurs. By proactively preventing clashing between vanes and rotor blades, the system avoids component damage that would require extensive repair and resulting system downtime, thereby maintaining component durability while minimizing time loss.
Solution Approach 2:
The feedback mechanism using resolvers and controllers continuously monitors vane position and takes corrective action to prevent mechanical interference. This real-time feedback loop prevents component damage that would otherwise require extensive repair, thereby maintaining component durability while avoiding the significant system downtime associated with repairs after mechanical clashing.
Data Source
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AI summary
The present application provides a variable stator vane control system (100). The variable stator vane control system (100) may include a variable stator vane (110) positioned by an actuator (140) and a trimmer motor (210), a resolver (230) to determine a position of the variable stator vane (110), and a controller (220) in communication with the resolver (230), the actuator (140), and the trimmer motor (210) to prevent over travel of the variable stator vane (110).