Method and device for detecting fastening force of low-pressure turbine shaft disk of aeroengine based on eddy current sensor group

A technology of eddy current sensors and low-pressure turbine shafts, applied to measuring devices, measuring torque/torsion force during tightening, instruments, etc., can solve problems such as low test efficiency

Active Publication Date: 2019-02-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the connection structure of the low-pressure turbine shaft disk of an aero-engine is a flange surface with an outer diameter of several hundred millimeters. Dozens of bolts are used for connection. It is inefficient to test the displacement of the entire disk surface. How to quickly and accurately determine the value of each bolt The preload state is also a problem that needs to be solved in practical applications

Method used

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  • Method and device for detecting fastening force of low-pressure turbine shaft disk of aeroengine based on eddy current sensor group
  • Method and device for detecting fastening force of low-pressure turbine shaft disk of aeroengine based on eddy current sensor group
  • Method and device for detecting fastening force of low-pressure turbine shaft disk of aeroengine based on eddy current sensor group

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Experimental program
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Effect test

Embodiment 1

[0101] A method for detecting fastening force of an aeroengine low-pressure turbine shaft disk based on an eddy current sensor group has the following steps:

[0102] S1. Obtain the relationship between the pre-tightening force of the low-pressure turbine bolts and the relative displacement and distribution of the upper and lower disk surfaces:

[0103] S11. Use the bolt axial force test system to tighten each bolt more than 3 times, record the relationship between the torque and the axial force after tightening 3 times, and select the bolt with the same end surface friction coefficient, tooth surface friction coefficient and axial force, And record its position on the low-pressure turbine shaft disk;

[0104] S12. Making the same low-pressure turbine shaft disk test piece as the low-pressure turbine shaft disk refers to making the same material as the low-pressure turbine shaft disk, the same inner and outer diameter of the flange, the same flange thickness, the same bolt spaci...

Embodiment 2

[0133] Such as Figure 5-Figure 7 As shown, an aero-engine low-pressure turbine shaft disk fastening force detection test device based on eddy current sensor group, including base 1, eddy current sensor feeding device 2 and V-shaped iron I3, V-shaped iron II4 and V-shaped iron III5, the V-shaped iron I3 is connected to the base 1 through the base 6, and the V-shaped iron II4 is connected to the base 1 through the horizontal feed platform I7 and the lifting platform I8 in turn, The V-shaped iron III5 is sequentially connected to the base 1 through the horizontal feed platform II9 and the lifting platform II10, and the V-shaped iron I3, the V-shaped iron II4 and the V-shaped iron III5 are all provided with pressure plates 11,

[0134] The eddy current sensor feeding device includes an eddy current sensor group connected in sequence, a sensor chuck 12, a radial micro-motion feeding platform 13, an angular position platform 14, a vertical feeding platform 15 and a horizontal feed...

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Abstract

The invention discloses a method and device for detecting the fastening force of a low-pressure turbine shaft disk of an aero-engine based on an eddy current sensor group. relationship; test the relative displacement of the upper and lower surfaces of the low-pressure turbine shaft-disc structure during or after assembly; determine whether the pre-tightening force is insufficient or too large for each bolt to be tested or adjacent bolts; determine unreasonable pre-tightening force bolts, and pre-tightening Tightness deviation value. The invention measures the relative displacement of the upper and lower disk surfaces of the low-pressure turbine shaft disk of the aero-engine, quickly and accurately judges the pre-tightening state of the bolts, does not need to destroy the bolt structure during the measurement process, and has higher precision than the current method of directly measuring the length of short bolts, and measures the relative displacement of the upper and lower disk surfaces , and the relative displacement deviation of the disk surface caused by the pretightening force deviation relative to the expected value, avoiding the influence of the basic coordinate deviation of the disk surface on the measurement data during the preloading process.

Description

technical field [0001] The invention belongs to the assembly technology of aero-engines, and in particular relates to a method and a device for detecting fastening force of a low-pressure turbine shaft disk of an aero-engine based on an eddy current sensor group. Background technique [0002] The low-pressure turbine of an aeroengine is a structure that transmits the power of the low-pressure turbine disk to the fan. It has a high operating speed and a large transmission torque value. The assembly work of the low-pressure turbine shaft disk is mainly composed of bolt tightening operations. The tightening process parameters such as tightening force, tightening sequence, and tightening times will affect the pre-tightening force of the bolts, and then affect the contact stress of the shaft-disk connection interface and the surface of the disk. Deformation and low-pressure turbine shaft coaxiality, low-pressure turbine shaft disc dynamic stiffness and dynamic stability will have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/90G01L5/24G01N27/9013G01N27/904G01N27/9093
CPCG01L5/24G01N27/9046
Inventor 孙清超黄伟强穆晓凯李鉴峰张伟
Owner DALIAN UNIV OF TECH
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