A model-based evaluation method for aeroengine blade profile data
A technology of aero-engine and surface data, applied in the direction of measuring devices, instruments, etc., can solve problems such as irregularities, measurement results that cannot reflect the real situation of parts, and unreasonable evaluation methods of surface measurement data, so as to achieve good measurement reproducibility and improve The effect of product quality and detection efficiency
Active Publication Date: 2021-04-30
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology
[0005] In view of the unreasonable and non-standard evaluation method of profile measurement data in the detection process of aero-engine blades in the prior art, which leads to the shortcomings that the measurement results cannot reflect the real situation of the parts and the measurement reproducibility is poor, the problem to be solved by the present invention is to provide a A model-based evaluation method for aeroengine blade profile data that can reflect the real situation of parts and has good measurement reproducibility
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[0033]The invention is further illustrated in the drawings of the specification below.
[0034]A model-based air engine blade type data evaluation method includes the following steps:
[0035]1) The evaluated leaf type profile is a wireless line profile, and the wire profile is fitted to the theoretical line before evaluation;
[0036]2) Thicken on the existing blade type design model, and generate a new blade type as the theoretical model of profile evaluation through the curve group of the blade;
[0037]3) In the case where the position of the blade surface tolerance is unchanged, the upper and lower limit values of the tolerance belt are changed, and the original tolerance + 0.05mm ~ -0.01mm is changed, and the new tolerance is +0.03mm ~ -0.03. MM, make the contour tolerance belt as a symmetrical tolerance;
[0038]4) The theoretical data using thickened theoretical models is evaluated as the profile profile of the blade profile.
[0039]This method is in the original design model, the upper an...
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The invention discloses a method for evaluating the profile data of an aeroengine blade based on a model. The steps are as follows: the profile of the blade profile to be evaluated is a line profile, and the line profile is fitted with a theoretical profile before the evaluation; the existing The blade profile design model is thickened, and a new blade profile is generated through the blade curve group as a theoretical model for profile evaluation; under the condition that the position of the blade profile tolerance zone remains unchanged, the upper and lower limits of the tolerance zone Change the value, change the original tolerance +0.05mm~‑0.01mm, set the new tolerance to +0.03mm~‑0.03mm, make the contour tolerance zone a symmetrical tolerance zone; use the theoretical data of the thickened theoretical model as the contour evaluation The theoretical profile of the blade profile. The invention reflects the real situation of parts and has good measurement reproducibility, promotes the development of engine detection technology to the integration of digital design, manufacture and detection, and improves key detection technology and detection efficiency.
Description
Technical field[0001]The present invention relates to an aviation engine blade data evaluation technique, specifically a model-based aeroengine blade type data evaluation method.Background technique[0002]The air engine blade has a non-standard surface characteristic, and the surface of the surface is a closed curve in the direction of the air flow. In the case of the blade surface geometric size, 4 to 5 sections are selected along the direction of the blade coordinate system (egfigure 1 The showing of the blade parameter is performed.[0003]Design requirements for profile profiles, position degrees, stringed angles, and string lengths and other parameters are evaluated according to design models. From the design model and tolerance band allocation, the blade profile is -0.01 ~ + 0.05, the leaf type allows the thickening of 0.05mm, thinner is only 0.01mm (egfigure 2 As shown), the measurement cost is added to the machining and measurement equipment accuracy of the processing and measu...
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IPC IPC(8): G01B21/20
CPCG01B21/20
Inventor 张露穆轩高阳任丽芬高金磊
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION