A Method for Measuring Wall Thickness of Hollow Turbine Blade Leading Edge

A technology of turbine blades and measurement methods, applied in the direction of measuring devices, instruments, and using wave/particle radiation, etc., can solve problems such as inaccurate measurement results, and achieve the effects of eliminating inaccurate measurement, eliminating amplification effects, and accurate measurement

Active Publication Date: 2021-11-09
AECC AVIATION POWER CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for measuring the wall thickness of the leading edge of a hollow turbine blade, which solves the problem of inaccurate measurement results in the prior art method for measuring the wall thickness of the leading edge of a hollow turbine blade.

Method used

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  • A Method for Measuring Wall Thickness of Hollow Turbine Blade Leading Edge
  • A Method for Measuring Wall Thickness of Hollow Turbine Blade Leading Edge
  • A Method for Measuring Wall Thickness of Hollow Turbine Blade Leading Edge

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Experimental program
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Embodiment

[0104] Step 1, make the blade bracket tooling: According to the data model of the hollow turbine blade, determine the tangent direction of the leading edge of the blade, convert the reference to the easy-to-clamp part, which is generally the tenon part, design and manufacture the bracket tooling to ensure the stable placement of the blade , the tangent direction of the leading edge of the blade is vertical, and the support tooling is as follows: Figure 16 , Figure 17 As shown, the vertebral head can be naturally placed on the tooling during use.

[0105] Step 2, select a stainless steel pipe with uniform diameter as a size standard block. The material of the pipe standard sample block is 1Cr18Ni9Ti, and the wall thickness is about 1mm.

[0106] Step 3, measure the inner diameter or outer diameter of the standard sample block of the pipe to obtain the standard value of the inner diameter or outer diameter. The reserved digits of the standard value are the same as the requir...

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Abstract

A method for measuring the wall thickness of the leading edge of a hollow turbine blade provided by the present invention comprises the following steps: Step 1, fixing the hollow turbine blade on a support tooling, and the tangential direction of the leading edge of the hollow turbine blade is vertically arranged in the vertical direction; Step 2: Arrange the standard sample block and the clamped hollow turbine blade side by side on the digital ray detector, and perform digital radiographic detection transillumination at the same time to obtain a digital image including the standard sample block and the hollow turbine blade, wherein the standard sample The block is a tubular structure with uniform diameter; step 3, use the size of the standard sample block to calibrate the spatial size of the digital image obtained in step 2; step 4, use the calibrated size of step 3 to process the digital image obtained in step 2 , to obtain the wall thickness of the leading edge of the hollow turbine blade; this method eliminates the inaccurate measurement caused by the amplification effect; eliminates the inaccurate measurement caused by the ambiguity, and the measurement by this method is more accurate.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, in particular to a method for measuring the wall thickness of the leading edge of a hollow turbine blade. Background technique [0002] During the manufacture and repair of aeroengine turbine blades, it is necessary to strictly monitor the changes in the blade profile and wall thickness, especially the hollow blades, to ensure that the blades can meet the required strength during work. [0003] At present, for the wall thickness measurement of hollow turbine blades, industrial CT thickness measurement and ultrasonic thickness measurement methods are mostly used at home and abroad. Using industrial CT technology to measure the wall thickness of hollow turbine blades requires high equipment costs and long inspection processing time (slow tomography and scanning speed), so it is not widely used in the production inspection process. Ultrasonic thickness measurement is mainly based on the princ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B15/02
CPCG01B15/02
Inventor 郭乃鹏王克广王婵周笔文马龙刘荣刘畅杨龙
Owner AECC AVIATION POWER CO LTD
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