Impact excitation system and test system based on impact excitation system

A technology of impact excitation and testing system, which is applied in the direction of impact testing, machine/structural component testing, measuring devices, etc. It can solve the problems of secondary impact and inability to accurately obtain impulse response, so as to avoid secondary impact and remove noise , the effect of accurate experimental results

Inactive Publication Date: 2018-12-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes an impact excitation system and a test system based on the impact excitation system, which solves the problems of secondary collisions and the inability to accurately obtain the impulse response in the prior art, and can apply a Pulse excitation to measure the static frequency of the blade

Method used

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  • Impact excitation system and test system based on impact excitation system
  • Impact excitation system and test system based on impact excitation system
  • Impact excitation system and test system based on impact excitation system

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Embodiment Construction

[0024] The present invention will now be further described in conjunction with the embodiments and accompanying drawings:

[0025] The embodiment includes a fixed base 1, a magnetic square box auxiliary support block 2, a magnetic square box 3, an electromagnet 4, an impact box 5, an impact box shell 5-1, a rebound spring baffle 5-2, and a rebound spring 5-3 , Front V-shaped limit roller 5-4, rear V-shaped limit roller 5-5, cylindrical limit roller 5-6, baffle 5-7, top screw 5-8, impact rod 6, measured blade 7, Vibration measurement system 8 , vibration measurement system support block 9 and position adjustment bracket 10 .

[0026] One end of the impact box 5 is provided with an electromagnet 4, and the contact of the electromagnet 4 is placed in the through hole in the center of the baffle plate 5-7; the impact rod 6 passes through the rebound spring baffle plate 5-2 and the rebound spring 5-3 and The punch 4-1 of the electromagnet 4 is in contact but not connected, the baf...

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PUM

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Abstract

The invention relates to an impact excitation system and a test system based on the impact excitation system. An impact rod is mounted in an impact box and controlled by an electromagnet; a rebound spring in the impact box ensures that the impact rod does not have a secondary impact with a blade to be tested; a blade fixture system is firmly connected with a base through a blade supporting seat soas to reduce noise caused by vibration of the system; the overall position of the excitation system is controlled by a magnetic square box; and an impact depression angle/elevation angle of the impact rod is adjusted through a position adjusting bracket. The invention effectively removes the noise generated by the secondary impact in the prior blade vibration measurement experiment, so that the experimental results of the vibration measurement system are more accurate. The impact excitation system can also be used as a mechanical vibration excitation source for vibration measurement systems for components other than the blade.

Description

technical field [0001] The invention belongs to a blade testing device, and relates to an impact excitation system and a test system based on the impact excitation system. Background technique [0002] Blades are one of the most important components in aeroengines. Whether it is a compressor or a turbine, the essence of its work is the interaction between the blades and the airflow. Therefore, the performance and life of the blades play a crucial role in the performance of the engine. During the working process of the aero-engine, the blade will always be impacted by the gas, and the excitation force of the alternating airflow will cause the blade to vibrate. When the frequency of the excitation force is equal to the natural vibration frequency of the blade, resonance will occur, resulting in blade fatigue or even fracture. In the pulse detonation turbine engine, the detonation engine will generate periodic and pulsed thrust, and its blades will be subjected to the test of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/08
CPCG01M7/08
Inventor 李勍杨训刘坤
Owner NORTHWESTERN POLYTECHNICAL UNIV
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