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Device for positioning an inspection tool

A technology for tools and assembly devices, applied in safety devices, machines/engines, engine functions, etc., can solve the problems of excessive assembly clearance accuracy, difficult implementation, long steps, etc., and achieve the effect of good rigidity and improved accuracy

Inactive Publication Date: 2016-12-14
SAFRAN HELICOPTER ENGINES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Thus, in this conventional solution, the performance of the positioning means is directly dependent on the constraints imposed by the aforementioned assembly screw, which can be disadvantageous in many respects
[0006] In particular, the step of placing the positioning means on the casing involves the step of removing said bolt and then placing it back in place, which can be lengthy especially when the bolt is difficult to reach as often happens in turbine engines and difficult to perform, and this step can have an impact on the total time required to perform the inspection
[0007] In addition, the positioning accuracy of the inspection tool relative to the opening of the housing is determined by the bolts, and their assembly clearances are often too large to obtain an accuracy sufficient for inspection purposes

Method used

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  • Device for positioning an inspection tool
  • Device for positioning an inspection tool
  • Device for positioning an inspection tool

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] In the illustrated embodiment (see for details Figures 1 to 4 ), the device according to this embodiment is a device 30 for positioning an inspection tool 130 relative to a flange 10 of a housing 1 having an axis of rotation Z, a peripheral surface 12 and two faces 14 perpendicular to the axis of rotation Z and 16. The device 30 has a first positioning part 40 and a second positioning part 70 separated from each other; and assembling means 90 and 100 for assembling the parts 40 and 70 together. The first part 40 has a fastening portion 45 suitable for fastening on one of the two faces 14 and 16 of the flange 10 . The second part 70 includes a hole 75 defining a reference axis X for positioning the inspection tool 130; and the second part also has a positioning surface 85 adapted to cooperate with the peripheral surface 12 of the flange 10 to place The reference axis X is positioned such that it intersects the axis of rotation Z. The first part 40 and the second part...

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PUM

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Abstract

The present description relates to a device (30) for positioning an inspection tool (130) with respect to a flange (10) of a casing (1). This device (30) comprises a first positioning piece (40) and a second positioning piece (70) which are assembled with one another. The first piece (40) comprises a fixing part (45) able to be fixed to the flange (10). The second piece (70) comprises a bore (75) defining a reference axis (X) for the positioning of the inspection tool (130); and a positioning surface (85) able to collaborate with a circumferential surface (12) of the flange (10) if the reference axis (X) is positioned secant to an axis of revolution (Z) of the flange (10). The first and second pieces (40, 70) comprise respective wedging surfaces (50, 80) able to collaborate with one another with the reference axis (X) being positioned perpendicular to the axis of revolution (Z).

Description

technical field [0001] The present invention relates to a device for positioning an inspection tool relative to a housing flange, in particular for positioning endoscopes for the evaluation of local deformations on movable Corrosion of the blades of movable components of turbine engines such as the impellers of compressors. Background technique [0002] In a known manner, the corrosion of the movable components installed in the housing is evaluated using inspection tools, in particular endoscopes. [0003] Such maintenance checks are particularly welcome when movable components are included in turbine engines, which are subjected to high levels of mechanical stress due to the high speed at which they typically rotate. This point of view is even more relevant when such a turbine engine has a centrifugal compressor, as is usually the case for helicopter engines, the impeller of the compressor being centrifugally subjected to a high level of stress which acts on the blades of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00F01D25/28
CPCF01D21/003F01D25/285F05D2220/329F05D2230/64F05D2230/72F05D2260/80
Inventor T·德罗因O·P·德斯库贝斯
Owner SAFRAN HELICOPTER ENGINES