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Online multi-parameter detection method for special-shaped film holes of engine flame tube

A detection method and technology of air film holes, which are used in measuring devices, instruments, optical devices, etc., can solve the problems that limit the development of air film hole processing technology. , real-time detection of spatial azimuth angle, etc., to achieve huge economic benefits and social value, improve reliability and stability, and high yield.

Inactive Publication Date: 2021-06-25
EAST CHINA NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible to detect the hole profile, roughness, and spatial azimuth of each film hole in real time, which greatly limits the development of film hole processing technology and the further improvement of the flame tube's withstand temperature

Method used

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  • Online multi-parameter detection method for special-shaped film holes of engine flame tube
  • Online multi-parameter detection method for special-shaped film holes of engine flame tube
  • Online multi-parameter detection method for special-shaped film holes of engine flame tube

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Experimental program
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Effect test

Embodiment 1

[0041] See attached figure 1 , carry out online multi-parameter detection and error analysis on the gas film hole of the flame tube according to the following steps:

[0042] (1), clamping and positioning

[0043] Assemble the flame cylinder in the special fixture of the flame cylinder positioning device 8 and fix it on the five-axis precision translation table. In order to ensure the reliability of processing and measurement, the design and production of the special fixture must be strictly consistent with the model of the flame cylinder.

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Abstract

The invention discloses an online multi-parameter detection method for special-shaped film holes of an engine flame tube, which is characterized in that a CCD (Charge Coupled Device) coaxial feature recognition system is integrated in a film hole laser processing device, a five-axis translation table is used to adjust the spatial attitude of a flame tube, and a CCD coaxial detection module and a white light interferometer are used to carry out online multi-parameter detection and error analysis on the film holes. Compared with the prior art, the method has the advantages that the positioning precision, the space azimuth angle error, the three-dimensional hole pattern contour error and the like of each film hole are detected in a non-contact mode, it is ensured that the cooling films efficiently and completely protect the flame tube wall, no gap is left to cause local damage, the yield of the film holes of the flame tube is well ensured, the machining precision is improved, the practicability is high, and the method has wide popularization and application prospects.

Description

technical field [0001] The invention relates to the technical field of non-contact detection, in particular to an on-line multi-parameter detection method for the cooling air film hole of the flame tube of the combustion chamber of an aero-engine. Background technique [0002] Gas turbine engines have been widely used in aviation and marine fields since their inception. With the continuous development of the aviation industry, the performance requirements for engines are getting higher and higher. The temperature of the aero-engine combustion chamber is the key to increasing the thrust-to-weight ratio. When the temperature of the engine combustion chamber is 1850-1950K, the thrust-to-weight ratio can reach about 10, and when the combustion chamber temperature reaches 2100-2300K, the thrust-to-weight ratio increases to 15-20. The temperature of the combustion chamber has greatly exceeded the melting point of the flame cylinder. At present, the structure design of the flame t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01B11/26G01B11/00
CPCG01B11/2441G01B11/002G01B11/26
Inventor 贾天卿蒋其麟曹凯强陈龙徐红星
Owner EAST CHINA NORMAL UNIV
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