Gas Turbine Compressor Blade Deformation Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gas turbine compressor blades deform over time due to cracks or warping, leading to reduced efficiency and potential damage to other components, necessitating a method to detect deformation accurately and prevent premature replacement.
Innovation Solution
A compressor system with a monitoring part using tip sensors to measure the rotation times of the leading and trailing edges of blades, calculating an estimated chord length, and comparing it with reference data to determine deformation, along with acquiring and comparing shape images to assess blade integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blade deformation is not monitored, then blades are replaced prematurely, but if monitoring is implemented, then detection precision is improved
Solution Approach 1:
The patent replaces complex mechanical monitoring systems with optical sensing. Tip sensors detect blade position and deformation through optical means, measuring rotation times of leading and trailing edges to calculate chord length changes. This substitution achieves high measurement precision while reducing mechanical complexity.
Solution Approach 2:
The patent creates a virtual model of the blade by capturing shape images and comparing them with reference images. This copying approach allows deformation detection through image analysis rather than direct physical measurement, improving detection precision without adding complex hardware.
2Reliability
If monitoring system is added, then blade condition is detected accurately, but compressor structure becomes more complex
Solution Approach 1:
The monitoring system is designed to serve multiple functions: detecting blade deformation through chord length calculation, capturing shape images for visual inspection, and providing rotational position data. This multi-functionality improves reliability while minimizing the number of separate components needed.
Solution Approach 2:
The patent introduces tip sensors as intermediary devices that indirectly measure blade deformation by detecting the rotation times of blade edges. These sensors act as mediators between the blade and the monitoring system, providing reliable deformation data without requiring direct contact or complex instrumentation on the blade itself.
3Measurement precision
If traditional monitoring methods are used, then system is simple, but deformation detection is inaccurate leading to premature replacement
Solution Approach 1:
The system continuously monitors blade rotation times and compares measured chord lengths with reference values. This feedback mechanism allows real-time detection of deformation trends, enabling accurate assessment of blade condition and extending operational time by avoiding premature replacement while ensuring timely detection of actual deformation.
Solution Approach 2:
The patent establishes reference images and reference chord length values before blade operation. These preliminary measurements serve as benchmarks for detecting deformation, allowing the system to accurately determine when actual blade dimensions deviate from their original state, thus improving detection accuracy and preventing premature replacement.
Data Source
AI summary
A compressor for a gas turbine having means for determining whether a blade of the compressor has been deformed includes a rotor having an outer circumference on which a blade is formed; a monitoring part for monitoring a driving state of the blade in order to acquire monitoring information on the driving state of the blade; and a control part for determining whether the blade has been deformed based on the monitoring information. The monitoring part detects time points at which the trailing edge and the leading edge of the blade pass and acquire the detection time information of the detected time point. The control part receives the detection times of the trailing edge and the leading edge from the monitoring part and determines whether the blade has been deformed based on the detection time of the trailing edge and the detection time of the leading edge.