System and method for measuring exhaust area of turbine guider of aero-engine

Abstract

The invention relates to an aero-engine turbine guider exhaust area measurement system, and the system comprises a single-shaft rotary table which is connected with an aero-engine turbine guider and can drive the aero-engine turbine guider to rotate; an optical scanner; the six-degree-of-freedom mechanical arm is connected with an optical scanner and can drive the optical scanner to move relative to the single-axis rotary table; the controller is connected with the single-shaft rotary table, the six-degree-of-freedom mechanical arm and the optical scanner, can control the single-shaft rotary table and the six-degree-of-freedom mechanical arm to act cooperatively, and can control the optical scanner to collect three-dimensional point cloud coordinates of all parts of the aero-engine turbine guider; and the computer is connected with the optical scanner and can calculate the exhaust area of the aero-engine turbine guider according to the three-dimensional point cloud coordinates of all the parts of the aero-engine turbine guider. In addition, the invention relates to an aero-engine turbine guider exhaust area measuring method.

Description

technical field [0001] The application belongs to the technical field of measuring the exhaust area of ​​an aero-engine turbine guide, and in particular relates to a measurement system and method for the exhaust area of ​​an aero-engine turbine guide. Background technique [0002] The total exhaust area of ​​the turbine guider in the aero-engine and the exhaust area of ​​each window have an important impact on the performance of the aero-engine. Accurately obtaining the total exhaust area of ​​the aero-engine turbine guider and the exhaust area of ​​each window can be Provide guidance for turbine guider machining, manufacturing and its performance prediction. [0003] Currently, the following three methods are mainly used to measure the total exhaust area of ​​an aeroengine turbine guide and the exhaust area of ​​each window: [0004] 1) Standard sample measuring tool method, use the special measuring tool calibrated by the standard sample to measure the relevant geometric ...

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Problems solved by technology

[0004] 1) Standard sample measuring tool method, use the special measuring tool calibrated by the standard sample to measure the relevant geometric parameters of the turbine guide of the aero-engine, and calculate the total exhaust gas of the turbine guide of the aero-engine according to the measured geometric parameters The area and the exhaust area of ​​each window, this method is cumbersome to operate, the measurement efficiency is low, and it needs multiple geometric parameters to support the calculation to obtain the total exhaust area of ​​the aeroengine turbine guider and the exhaust area of ​​each window, and there is a data accumulation error transmission, the error is large;

[0005] 2) Three-coordinate measurement method, using a three-dimensional coordinate measuring machine to collect three-dimensional point coordinates on the turbine guider of the aero-engine, and calculating the total exhaust area of ​​the turbine guider of the aero-engine and the exhaust area of ​​each window according to the measured three-dimensional point coordinates, The density of 3D point coordinates collected by this method is low, and it cannot accurately reproduce the contour characteristics of the turbine guider of the aero-engine, and the windows of the turbine guider of the aero-engine are narrow, and the contact probe of the three-coordinate measuring machine cannot collect the 3D point coordinates area, it is difficult to obtain accurate measurement results;

[0006] 3) Acoustic resonance frequency method, the Helmholtz resonant cavity is in sealing contact with the guide vane of the turbine guider of the aero-engine, and the resonance frequency with the largest sound wave transmission loss is identified by using the acoustic principle, and the volume of the resonant cavity is calculated based on this frequency, and the calculated The exhaust area of ​​each window of the turbine guider of the aero-engine, this method is complex to operate, there are many error terms, and the accuracy of the measurement results is low

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