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Method for determining fatigue test load of engine main shaft

A technique for fatigue testing and determination of methods, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc. It can solve the problems that the spindle fatigue test can only be carried out on a special shaft fatigue tester, and achieve improvement The effect of load loading accuracy, reducing loading difficulty and reducing cost

Active Publication Date: 2019-03-26
AECC SICHUAN GAS TURBINE RES INST
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AI Technical Summary

Problems solved by technology

Through the equivalent conversion of the fatigue test load of the shaft parts, the test load can simulate the fatigue load of the parts, and can be loaded by a commonly used material fatigue testing machine, so as to solve the problem that the spindle fatigue test can only be carried out on a special shaft fatigue tester question

Method used

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  • Method for determining fatigue test load of engine main shaft
  • Method for determining fatigue test load of engine main shaft
  • Method for determining fatigue test load of engine main shaft

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Embodiment Construction

[0030] The invention of the present invention is optimized and improved on the basis of determining the test load by the original life divergence coefficient method. After determining the standard cyclic load of the main shaft, the standard cyclic load is converted into an equivalent cyclic load by adding an equivalent conversion of the load, and then multiplied by With the corresponding divergence coefficient, the test load spectrum is obtained. Taking the axial flow engine as an example, its technical scheme and specific implementation are introduced.

[0031] The specific process for determining the fatigue test load of the engine main shaft is as follows: figure 1 shown.

[0032] (1) Determine the standard cyclic load

[0033] The load that affects the fatigue life of the spindle is mainly the torque M T , vibration torque ΔM T , axial force P, rotational bending moment M b , these loads of the main shaft life assessment part constitute the standard cyclic load of the...

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Abstract

The invention provides a method for determining the fatigue test load of an engine main shaft, which solves a problem that the rotating bending moment load cannot be loaded on the ordinary fatigue test machine in the shaft fatigue test through equivalently converting the rotating bending moment load into the vibration torque load, enables small-size shaft parts to be subjected to a fatigue test byusing the ordinary fatigue test machine and does not need to carry out special shaft fatigue tester design, reconstruction or great transformation in allusion to the size of the tested shaft, therebyreducing the cost of the shaft fatigue test, also reducing the test load loading difficulty, and improving the load loading accuracy.

Description

technical field [0001] The invention belongs to the field of engines and relates to a method for determining the fatigue test load of an engine main shaft. Background technique [0002] Aeroengine shaft parts are the supporting parts on the rotor and the parts that transmit torque (power) on the rotor. The main shaft of the engine is a very important load-bearing part. During work, it bears low-cycle fatigue loads including main torque, axial force and axisymmetric load, and high-cycle fatigue loads including gyro torque, vibration torque, unbalanced force, etc. at the same time. In engine design, it is necessary to assess its life through shaft fatigue tests. [0003] In engineering, the determination of the spindle fatigue test load is generally directly multiplied by the standard cyclic load and the divergence coefficient as the test load spectrum, that is, directly multiplied by the standard cyclic load such as axial force, torque, vibration torque and rotational bendin...

Claims

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Application Information

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IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 沈晓薇于进学高雄兵张晓晶
Owner AECC SICHUAN GAS TURBINE RES INST
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