Dynamic stress testing method for stator vane under operating state of gas turbine engine

A technology of engine operation and gas turbine, applied in the direction of measuring force, measuring devices, instruments, etc., can solve the problems of difficult realization of dynamic test conditions, and achieve the effect of real test data, complete information, and real and reliable test data

Active Publication Date: 2014-07-30
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the dynamic test of the blade under the running state of the engine is rarely carried out at present, because the conditions for the dynamic test under the running state of the engine are difficult to achieve

Method used

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  • Dynamic stress testing method for stator vane under operating state of gas turbine engine
  • Dynamic stress testing method for stator vane under operating state of gas turbine engine

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Experimental program
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Embodiment Construction

[0013] 1. Determine the sticking position of the strain gauge. Using modal tests and simulation calculations, the cloud map of the stress distribution of the guide vane or the stator blade under the actual constraint conditions is given, and the maximum stress area of ​​the stress distribution on the cloud map is selected, combined with the actual location of the defect problems such as cracks or missing pieces of the blade to be analyzed , determine the pasting position of the strain gauge, and then paste the strain gauge on the leaf pot and the leaf back of the blade respectively according to the determined position;

[0014] 2. Sticking and curing of strain gauges. Since the blades are installed in the engine casing, the temperature inside the casing is generally close to 200°C during operation, and there are high pressure and flow velocity, so the strain gauges must be firmly pasted, otherwise if the engine falls off during the working process It will cause a safety hazar...

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Abstract

The invention belongs to the technology for testing aircraft engines and relates to an engine vane surface dynamic stress testing method. A dynamic stress testing method for a stator vane under the operating state of a gas turbine engine allows a dynamic stress test to be conducted on a guide vane and the stator vane of the engine under the operating state of the engine. Due to the fact that strain gages are directly stuck to the vanes of the engine to conduct dynamic testing, test data are real and accurate, information is complete, quantitative analysis is easy, and bases can be provided for analysis of faults such as vane cracking and chip off-falling, and meanwhile reliable data are provided for the further mastering of the distribution of charges on the surfaces of the engine vanes.

Description

technical field [0001] The invention belongs to the testing technology of aero-engine, and relates to a method for testing dynamic stress on the surface of engine blades. Background technique [0002] Modern aircraft have higher and higher requirements for aero-engine performance, such as high temperature, high speed, high thrust-to-weight ratio, high reliability, and long life. The reliability and life of the engine blades are determined by the structural strength of the blades and the distribution of surface pressure loads and stresses. However, the dynamic test of the blades under the running state of the engine is seldom carried out at present, because the conditions for carrying out the dynamic test under the running state of the engine are difficult to realize. First of all, how to find out the maximum stress point on the blade, how to arrange the points so that the stress characteristics of the blade can be accurately measured without affecting the stress characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22
Inventor 田慧清刘忠华张顺利张振宇苗向马英万东强俞静华
Owner AECC AVIATION POWER CO LTD
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