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Turbine blade CT detection device and detection method

A turbine blade and detection device technology, which is applied in the direction of using radiation for material analysis, etc., can solve problems such as easy missed detection and inability to adjust the angle of the ray fan.

Inactive Publication Date: 2009-05-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the fixture of ordinary industrial CT cannot adjust the angle between the ray fan and the scanned workpiece. When the crack is perpendicular to the ray beam plane, the crack appears as a point or a small area in the CT cross-sectional image, which is easy to be missed.

Method used

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  • Turbine blade CT detection device and detection method
  • Turbine blade CT detection device and detection method

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Embodiment Construction

[0051] Fig. 1 is a schematic cross-sectional view of the structure of the present invention, Fig. 2 is a top view of Fig. 1, and Fig. 3 is a schematic diagram of the present invention, as shown in the figure: the turbine blade CT detection device of the present embodiment includes a workbench 1, a ray generating device 12, Data acquisition device 13 and control and image processing system 14, in the present embodiment, data acquisition device 13 is arc-shaped linear array detector, and described workbench 1 is positioned at the inner side of arc-shaped linear array detector, adopts linear array detector , can avoid the crosstalk of rays; the ray generating device 12 and the data acquisition device 13 are connected with the control and image processing system 14;

[0052] It also includes a retractable rotary fixture, which includes a rotary table 2, a rotary table drive device 17, a pull rod 8, a pull rod drive device, and at least one swing rod 6 and a clamping body 3 distribu...

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Abstract

The invention discloses a turbine blade CT detection device and a detection method thereof. An opening-closing fixture structure is arranged on a fan-beam industrial CT device base; blades are fixed on a fixture so as to be scanned, and the simultaneous scanning for a plurality of blades can be realized; and cracks perpendicular to a scanning sector can be no longer perpendicular to the scanning sector by adjusting the inclination angle of the blades on the fixture. The device can inhibit the influence of dotted noise in CT images on measurement results, is accurate in extraction result to the cracks perpendicular to an X-ray surface, misses no crack detection, is high in measurement precision, adopts a proposal of extracting a crack region by a multi-scale curved-wave transformation method, utilizes the characteristics of curved wave, can adapt to the shape changes of the cracks, and can separate the crack region according to the shapes of the cracks, so as to accurately measure the cracks.

Description

technical field [0001] The invention relates to a turbine blade crack detection device and method, in particular to a turbine blade CT detection device and a detection method thereof. Background technique [0002] Turbine blade detection is an important maintenance procedure in aerospace and shipbuilding industries, which is related to safe operation and an important means to avoid safety accidents. [0003] In the prior art, there are mainly four types of crack detection methods based on industrial CT. The first type is based on the physical principles of CT to obtain the relationship between specimen density damage and volume strain, and obtain a universal calculation formula for crack width. The method does not segment the crack, does not obtain the shape of the crack, and cannot determine the exact position of the crack; the second type is the crack detection of ultrasonic detection technology, and the position and equivalent size of the defect are obtained according to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/18G01N23/04
CPCG01N23/046G01N2223/63G01N2223/409
Inventor 曾理李林升悦秀娟
Owner CHONGQING UNIV
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