Unlock instant, AI-driven research and patent intelligence for your innovation.

Test method for anti-loosening characteristics of low-pressure turbine shaft-disc connecting bolts

A low-pressure turbine shaft and characteristic test technology, which is applied in vibration test, machine/structural component test, measuring device, etc., to achieve the effect of convenient and easy method

Active Publication Date: 2018-10-16
DALIAN UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then build a test system to test and simulate the working environment of the bolt force, thermal condition, and axial force dispersion of the low-pressure turbine shaft disk connection during the actual operation of the aeroengine, as well as the test method for the decline of the axial force during the operation process, which can be accurately measured Problems of self-loosening characteristics of low-pressure turbine shaft disk bolted connection structure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Test method for anti-loosening characteristics of low-pressure turbine shaft-disc connecting bolts
  • Test method for anti-loosening characteristics of low-pressure turbine shaft-disc connecting bolts
  • Test method for anti-loosening characteristics of low-pressure turbine shaft-disc connecting bolts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The specific implementation manner of the present invention will be described in detail in conjunction with the accompanying drawings and technical solutions.

[0047] figure 1 It is a flow chart of the test method of the present invention, figure 2 is the schematic diagram of the test device. Embodiment 1 of the present invention according to attached figure 1 The flow chart of the test method is carried out, and the specific steps are as follows:

[0048] Step 1 Assemble the simplified test piece of the low-pressure turbine shaft disk and build the test device.

[0049] The test piece is composed of the test piece rear rotor 8, the test piece front rotor 11, the rear bearing 9, the front bearing 4, and the bolt group 5; one end of the test piece front rotor 11 is installed in the inner ring of the front bearing 4, and the test piece rear rotor 8 One end of the test piece is installed in the inner ring of the rear bearing 9; the front rotor 11 of the test piece an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for testing an anti-loosening characteristic of a low-pressure turbine wheel shaft disc connecting bolt. The method is characterized in that a nonlinear force bearing deformation line graph of a low-pressure turbine wheel shaft disc bolt connecting structure is firstly drawn for determining related functions of low-pressure turbine wheel shaft multi-bolt connecting elasticity; and then a low-pressure turbine wheel shaft bolt connecting structure self-loosening characteristic test piece is manufactured according to two characteristics; and finally a testing system is built for loading a load and extracting a self-loosening characteristic signal.

Description

technical field [0001] The invention belongs to the field of anti-loosening characteristic testing of bolts, and relates to an anti-loosening characteristic test method for a multi-bolt connection test piece of a low-pressure turbine shaft disk of an aero-engine under the comprehensive consideration of force and thermal load. Background technique [0002] The low-pressure turbine is one of the most critical components in an aeroengine, and it is connected to the low-pressure turbine shaft and the cone wall by dozens of high-strength bolts. During the operation of the engine, the low-pressure turbine shaft-disk bolt connection structure bears axial force up to tens to tens of tons, as well as centrifugal force caused by eccentricity during high-speed rotation of thousands of revolutions, and the working temperature of the shaft-disk bolt connection structure can reach 200°C . Loosening during operation is one of the most important failure modes of the low-pressure turbine sh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 孙清超孙新孙志勇马跃
Owner DALIAN UNIV OF TECH