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Method for measuring fatigue test maximum stress of single-journal vane

A technology of maximum stress and fatigue test, applied in the testing of machine/structural components, measuring force, measuring device, etc., can solve the problems of difficult clamping, difficult to determine the position and data of the maximum stress point, and difficult to test, and achieve social and military effectiveness

Inactive Publication Date: 2009-04-29
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
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  • Application Information

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Problems solved by technology

[0003] Due to the particularity of the structure of the single-journal blade (the arc is connected to the straight line, and the arc is small), it is not easy to clamp, the test is quite difficult, and the position and data of the maximum stress point are difficult to determine. There is no blade with this structure in China. The test method can be used for reference

Method used

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  • Method for measuring fatigue test maximum stress of single-journal vane
  • Method for measuring fatigue test maximum stress of single-journal vane
  • Method for measuring fatigue test maximum stress of single-journal vane

Examples

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Embodiment 1

[0022] Example 1 A method for measuring the maximum stress of a single-journal blade fatigue test blade body

[0023] The equipment used is: electromagnetic vibrating table and special positioning device;

[0024] The specific structure of the special positioning device includes the following parts: clamp body 1, spring collet 4, pressure block 5, clamping screw 6, tension screw 7, angular positioning groove 8; wherein: the clamp for installing the detected blade Specifically 1 is fixed on the electromagnetic vibrating table, the pressure block 5 and the spring sleeve 4 are installed in the hole on the clamp body 1 for fixing the shaft diameter of the blade, and the tension screws 7 are respectively fixed on the clamp body 1 and the tail of the blade to be tested. The tightening screw 6 presses the pressure block 5 in a direction substantially perpendicular to the axial direction of the journal of the blade to be tested.

[0025] In the process of measuring the stress distrib...

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Abstract

The invention relates to a method for measuring the maximum stress of a fatigue test leaf lamina of a single-journal leaf blade, which comprises the following steps: firstly, the method of electrical measurement of a stress gauge is adopted for measuring stress distribution on the surface of the leaf lamina of the leaf blade and initially determining an area with large blade vibration stress; and secondly, the measuring method of sequential approximation is adopted for moving the stress gauge in the vertical or / and horizontal direction according to the small dimension of between 0.01 and 1 millimeter each time in the area with large blade vibration stress, performing repeated measurement, and finally finding out a coordinate of a point with the maximum stress on the leaf blade. The method is particularly suitable to be applied to a fatigue test of the single-journal leaf blade, can be well applied to a fatigue test assessment item in the field of national defense, solves the technical problem of related tests, and has large potential social benefit and military benefit.

Description

technical field [0001] The invention relates to material science and performance measurement technology of structural parts, and in particular provides a method for measuring the maximum stress of a blade body in a fatigue test of a single-journal blade. Background technique [0002] In our national defense industry, the production and testing technology of engine compressor blades is an important technology that has been gradually developed independently on the basis of imported products. Since the blades of the engine compressor work in a high-speed, high-pressure environment, the vibration problem of the blades is inevitable. In order to ensure that the blade has sufficient fatigue strength, vibration fatigue testing should be carried out on the blade according to regulations during the trial production and batch production of the blade. [0003] Due to the particularity of the structure of the single-journal blade (the arc is connected to the straight line, and the arc ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G01L1/22
Inventor 唐秀珍张荫鳌徐东阳万利陈国瑞王增玉徐永蛟李志贤范秀杰吴海峰
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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