Turbomachine Guide Blade Ring Inner Ring Segmentation
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Solution Overview
Problem
Existing turbomachines face challenges in the simple and repeatable installation and deinstallation of guide blade rings due to geometric and topological complexities, leading to potential distortion and maintenance issues.
Innovation Solution
An inner ring for the guide blade ring is designed with a specific ratio of outer diameter to height (D_AR/H_R ≥ 12), allowing for easy installation and deinstallation, and featuring ring segments that are elastically deformed to prevent unintended distortion, with bearing bushes inserted into openings to ensure stability and ease of replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner ring is formed from multiple ring segments with complex geometric conditions to enable installation and deinstallation, then the guide blade ring can be assembled and disassembled, but the installation and deinstallation process becomes complex and time-consuming
Solution Approach 1:
The inner ring is divided into multiple ring segments that can be independently positioned and installed. Each segment contains openings for journal bearings, allowing the guide blade ring to be assembled in sections rather than as a single complex piece, thereby simplifying the installation process while maintaining structural integrity
Solution Approach 2:
The ring segments are pretensioned to a constant clamping radius before installation. This preliminary action allows the segments to be positioned in the region of the journal bearings and then relaxed, enabling easy installation and deinstallation without complex geometric conditions
2Ease of operation
If the ring segments are pretensioned to a constant clamping radius for installation, then the guide blade ring can be assembled, but unintended distortion may occur during installation and deinstallation
Solution Approach 1:
The ring segments are pretensioned to a constant clamping radius before installation, which allows them to be easily positioned onto the journal bearings. After installation, the segments are relaxed to their natural state, ensuring that they fit properly without unintended distortion
Solution Approach 2:
The clamping radius of the ring segments is temporarily changed during installation by applying pretension, then returned to its original state after installation. This parameter change enables easy installation while preventing distortion in the final assembled state
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 design enables straightforward and repeatable installation and maintenance of guide blade rings, preventing distortion and ensuring stability, while allowing for a wide variation in blade pitches and materials, including nickel, chromium-nickel steels, aluminum alloys, titanium alloys, and fiber composites.
Implementation Method 1
the ring segments are pretensioned to a constant clamping radius, positioned in the region of the journal bearings, and then relaxed
Data Source
AI summary
An inner ring for forming a guide blade ring for a turbomachine is disclosed, composed of at least two one-part ring segments having a plurality of openings, closed on the peripheral side, for accommodating journal bearings on the blade side, the outer diameter of the inner ring being at least 12 times larger than its height. Also disclosed are a guide blade ring having this type of inner ring and a turbomachine having this type of guide blade ring.