GH3044 Optical Probe for Stable Turbine-Disk Radiation Measurement
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Solution Overview
Problem
Existing temperature measurement methods for turbine disks in aeroengines, such as contact and non-contact methods, face challenges in maintaining stability under high temperature, high pressure, and high vibration conditions, leading to potential damage and inaccurate readings.
Innovation Solution
An optical probe with a one-piece outer casing, GH3044 superalloy components, and a sapphire window piece with an antireflective film, designed for high temperature and pressure resistance, combined with a double-sided fixation and cold air vents for cooling, ensuring structural integrity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If contact temperature measurement method is used, then measurement precision is improved, but the temperature field distribution of the object is destroyed and dynamics deteriorate
Solution Approach 1:
The patent introduces an intermediary optical probe system that measures temperature through thermal radiation without direct contact. The probe includes optical components (lens, optical fiber) that mediate between the turbine disk's thermal radiation and the detection system, allowing temperature field measurement while preserving the original temperature distribution.
Solution Approach 2:
The patent replaces the mechanical contact-based temperature measurement system with an optical-based non-contact system. Instead of physically contacting the turbine disk with temperature sensors, the system uses optical fibers and lenses to detect thermal radiation, eliminating mechanical interference with the temperature field.
2Speed
If non-contact radiation temperature measurement method is used, then the temperature field distribution is preserved and response speed is improved, but measurement stability deteriorates under high temperature and vibration conditions
Solution Approach 1:
The patent applies beforehand cushioning by designing a protective outer casing structure that anticipates and mitigates the effects of high temperature and vibration. The casing includes vibration isolation structures and protective windows that are pre-configured to shield the optical components from environmental stresses before they can affect measurement stability.
Solution Approach 2:
The patent employs composite material structures in the probe design, combining materials with different properties to withstand high temperature and vibration. The outer casing and internal components use material compositions that provide thermal resistance, mechanical strength, and vibration damping, ensuring measurement stability in harsh turbine disk environments.
3Reliability
If complex fixation structures are used to improve stability under vibration, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the fixation system into modular components: an outer casing with integrated mounting features, separate vibration isolation elements, and distinct optical component holders. This modular segmentation allows each component to be optimized for its specific function while simplifying the overall assembly and maintenance processes.
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 probe provides stable and accurate radiation information measurement by withstanding high temperatures and pressures, preventing damage and maintaining signal integrity through air tightness and vibration resistance.
Implementation Method 1
a sapphire window piece with an antireflective film
Implementation Method 2
The basic principle of the noncontact temperature measurement method is that the thermal radiation of the object changes with the temperature
Implementation Method 3
cold air vents for cooling
Implementation Method 4
converting radiation into electrical signals through a photon detector
Data Source
AI summary
An optical probe with high stability for measurement of radiation information of a turbine disk of an aeroengine includes a one-piece outer casing, a pressing ring, a sapphire window piece, an inner spacer, an outer spacer, a lens, first fixing nuts, second fixing nuts, fixing ropes and fixing screws. The one-piece outer casing is made from GH3044 solid solution strengthened nickel-based antioxidant alloy. An interior of the probe is divided into eight parts, which are as follows from a proximal hot end to a right end of the probe in sequence: a pressing ring chamber, a cold air vent, a sapphire window piece chamber, an outer spacer fixing chamber, a lens chamber, a beam chamber, a beam focusing chamber, and an optical fiber chamber.