Adjustable Guide Vane Fixing Device for Turbomachines
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Solution Overview
Problem
Existing solutions for fixing the position of adjustable guide vane rows in turbomachines are not robust enough to withstand field conditions and lack flexibility in adjusting the position of synchronizing rings and guide vanes.
Innovation Solution
A device comprising a support arm, ring fixing sets with holding members and fixing bolts, where the fixing bolts are adjustable to securely engage with radial recesses or through-holes of synchronizing rings, allowing for variable positioning and angle adjustment of the guide vanes, and the support arm is securely fastened to the turbomachine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing solutions are used to fix the position of adjustable guide vane rows, then the position can be fixed, but the solution is not robust enough to withstand field conditions and lacks flexibility in adjusting the position of synchronizing rings and guide vanes
Solution Approach 1:
The fixing device incorporates adjustable components including the support arm with adjustable angle relative to the turbine axis, the holding member with adjustable angle relative to the support arm, and the fixing bolt with adjustable position along both the longitudinal direction of the holding member and the longitudinal axis of the fixing bolt. These dynamic adjustment capabilities allow the device to adapt to different field conditions while maintaining reliable fixation of the synchronizing ring and guide vanes
Solution Approach 2:
The device enables multiple parameter adjustments: the angle of the support arm relative to the turbine axis, the angle of the holding member relative to the support arm, and the position of the fixing bolt along the longitudinal direction of the holding member and its own longitudinal axis. By changing these parameters, the device achieves both reliability in fixation and flexibility in adaptation to various field conditions and turbomachine configurations
2Reliability
If the fixing device provides robust fixation for field conditions, then reliability improves, but device complexity increases due to multiple adjustable components
Solution Approach 1:
The fixing device is divided into distinct functional segments: the support arm for positioning relative to the turbine, the holding member for securing the synchronizing ring, and the fixing bolt for final fixation. Each segment has specific adjustment capabilities, allowing the complex functionality to be distributed across modular components that can be independently adjusted and maintained
3Adaptability or versatility
If multiple adjustment capabilities are provided for flexibility, then adaptability improves, but ease of operation decreases due to multiple adjustment steps
Solution Approach 1:
The device allows preliminary positioning through the support arm angle adjustment relative to the turbine axis, followed by securing the synchronizing ring through the holding member angle adjustment. The fixing bolt is then positioned along the longitudinal direction of the holding member and its own axis to lock the configuration. This sequential preliminary action approach breaks down complex adjustments into manageable steps, improving ease of operation while maintaining adaptability
Data Source
AI summary
A device for fixing the position of adjustable vane rows of a turbomachine is disclosed. The device is intended for use with a turbomachine in which the guide vanes of a row of adjustable guide vanes are coupled together by a synchronizing ring. The device includes a support arm and at least one ring fixing set including a holding member and a fixing bolt. The fixing bolt is provided and dimensioned to engage an opening at the circumference of the synchronizing ring and to fix the position of the synchronizing ring and thus of the adjustable guide vanes coupled to the synchronizing ring.