Method for removing fault of vibration value of engine

A troubleshooting and engine technology, applied in machine/structural component testing, static/dynamic balance testing, measuring devices, etc., can solve problems such as long troubleshooting period, large decomposition depth, and many troubleshooting inspection items, etc. Achieve the effects of shortening the troubleshooting cycle, saving repair costs and high economic benefits

Inactive Publication Date: 2013-02-13
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of decomposition depth is large, there are many troubleshootin

Method used

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  • Method for removing fault of vibration value of engine
  • Method for removing fault of vibration value of engine

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Experimental program
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Embodiment

[0018] For an engine with a vibration change fault, the method for eliminating the vibration value change fault provided by the present invention is adopted, and the specific process steps are as follows:

[0019] (1) Partially disassemble the engine: divide the lower half of the outer duct and the first half of the high-pressure stator casing to expose the high-pressure compressor rotor;

[0020] (2) Query balance data: query the balance data of the high-pressure compressor rotor of the engine before the test run, see Table 1, and find out the actual light-point position of the high-pressure compressor rotor through the light-point position displayed by the balance data;

[0021] Table 1: Balance data before test run

[0022] Implementation number

High pressure rotor unbalance value (g.cm)

Tap the phase angle (°)

1

68.9

347

2

80.7

111

3

51.4

20

[0023] (3) Adjust the unbalance of the high-pressure compress...

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PUM

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Abstract

The invention provides a method for removing a fault of a vibration value of an engine. The method is characterized in that residual unbalance of a high-pressure rotor is changed by a method for adjusting the quality of a high-pressure air injection primary rotor blade, so that the vibration fault is removed. The adjustment scheme of the high-pressure air injection primary rotor blade is characterized in that the mass difference of an I level light key point blade of the high-pressure rotor according to a phase of front balance of an engine test, so that the increased unbalance is obtained; and the mass of the blade to be adjusted is equal to dividing a rotation radius of a mass center of the high-pressure air injection I level rotor blade by the increased unbalance. The method acts on an engine using an elastic oil membrane damping manner, so that the vibration fault can be effectively removed through little resolving depth. Therefore, the vibration value of the engine meets working requirements; meanwhile, the damping period of the engine can be reduced; the fault removing cost of the engine can be reduced; and the labor intensity of the operator can be reduced.

Description

technical field [0001] The invention relates to the field of engine repairs, and specifically provides a method for troubleshooting aeroengine vibration changes. Background technique [0002] After the repair of the aero-engine is completed, it is necessary to conduct a test run assessment. In the test run assessment, the vibration value has always been one of the key assessment indicators of the engine. As one of the inherent characteristics of the rotor, vibration cannot be eliminated. We can only reduce the excitation source of vibration by various methods and avoid the resonant frequency of the rotor. [0003] Vibration faults usually have two types: large vibration and change in vibration value. For the engine with a change in vibration value, it is necessary to disassemble the engine every time it is eliminated, check the remaining unbalance of the rotor, and formulate a corresponding troubleshooting plan, which not only takes a long period but also high cost. pass ...

Claims

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Application Information

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IPC IPC(8): G01M1/32
Inventor 李明孙汕民耿旭宋扬
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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