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A processing and positioning method of cooling air film hole of aero-engine flame tube

An aero-engine and positioning method technology, which is applied in the direction of combustion methods, air transportation, climate sustainability, etc., can solve the problems of low yield, large error, time-consuming and labor-intensive, etc., to improve clamping efficiency, avoid positioning errors, The effect of facilitating subsequent removal

Active Publication Date: 2022-07-08
星控激光科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is time-consuming and laborious, with great error and low yield

Method used

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  • A processing and positioning method of cooling air film hole of aero-engine flame tube
  • A processing and positioning method of cooling air film hole of aero-engine flame tube
  • A processing and positioning method of cooling air film hole of aero-engine flame tube

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The precise positioning and processing of the cooling gas film holes of the flame tube are carried out according to the following steps:

[0037] 1) Flame collet mounting

[0038] The flame tube is mounted on a special fixture, which is specially designed and customized.

[0039] 2) Theoretical coordinate acquisition

[0040] According to the UG model of the actual flame tube, the theoretical three-dimensional coordinates of the gas film holes of the flame tube in the world coordinate system are obtained; the three-dimensional hole position coordinates of all the gas film holes on the flame tube in the world coordinate system (X ,Y,Z); where the nth hole coordinate is represented by (X n ,Y n ,Z n ) calibration, n represents the machining sequence of the holes.

[0041] 3) Spray developer

[0042] Evenly spray a thin layer of white contrast-enhancing developer on the surface of the flame barrel.

[0043] 4) Pre-mark dots

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Abstract

The invention discloses a processing and positioning method for cooling air film holes of an aero-engine flame tube. The coordinates of the center point are obtained by processing the "black oxide point" point cloud, and the coordinates of the point are fitted with the corresponding design coordinates of the gas film hole in the theoretical model, and the spatial attitude transformation algorithm is used for correction. The coordinates of the membrane hole are input into the industrial computer, and the center position of the pre-drilling point of the gas membrane hole is tracked in real time, so as to realize the precise processing and positioning of the gas membrane hole. Compared with the prior art, the invention has the positioning accuracy of the gas film hole of the flame cylinder, effectively solves the problems of low geometric accuracy and unstable quality caused by the accumulated deformation in the process of processing the gas film hole of the flame cylinder. The value of popularization and application in the processing of special-shaped gas film holes in engine flame tubes.

Description

technical field [0001] The invention relates to the technical field of laser processing of aero-engine flame cylinders, in particular to a precise processing and positioning method for cooling air film holes of flame cylinders. Background technique: [0002] The flame tube of the aero-engine mainly acts as an air distributor, which can divide the air entering the combustion chamber into several strands and distribute the air to a suitable position to organize combustion or cool the wall of the flame tube. The air film holes play the main purpose of heat exchange. A large number of complex air film holes can guide the cooling air flow into a uniform cooling air film, and improve the wall temperature resistance of the flame tube so that the engine can obtain a higher combustion temperature and thrust-weight ratio. . There are 10,000 to 30,000 air film holes on the flame tube of different types of aero-engines, and the spatial angle covers ±135°. The cooling efficiency of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/28
CPCF23R3/283Y02T50/60
Inventor 贾天卿蒋其麟冯朝鹏曹凯强陈龙徐红星
Owner 星控激光科技(上海)有限公司
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