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Motor-driven non-contact shock excitation device and shock excitation method thereof

A motor-driven and vibration-exciting device technology, which is used in measuring devices, machine/structural component testing, vibration testing, etc. The effect of axial excitation

Inactive Publication Date: 2013-05-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small force of the electric vibrator, it cannot generate a large exciting force. In addition, it is extremely inconvenient to install and use a large permanent magnet.

Method used

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  • Motor-driven non-contact shock excitation device and shock excitation method thereof
  • Motor-driven non-contact shock excitation device and shock excitation method thereof
  • Motor-driven non-contact shock excitation device and shock excitation method thereof

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Experimental program
Comparison scheme
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Embodiment Construction

[0030] The present invention is described in further detail below in conjunction with accompanying drawing:

[0031] see Figure 1 to Figure 4 As shown, a motor-driven non-contact excitation device of the present invention includes a stepping motor 1, a shaft coupling 2, an eccentric shaft 3, a first support bearing 4, a second support bearing 5, a connecting rod 7, and a linear guide rail 8 , the first slider 9, the second slider 10, the electro-permanent magnet 12, the armature 13, the strain gauge bridge 11, the strain signal conditioning circuit 17, the AD converter 16, the industrial computer 15 and the subdivision driver 14. The subdivision driver 14 drives the stepping motor 1, and the stepping motor 1 drives the eccentric shaft 3 through the shaft coupling 2, and the first supporting bearing 4 and the second supporting bearing 5 arranged at intervals are used to support the eccentric shaft 3. The first slider 9 and the second slider 10 are fixed on the linear guide ra...

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Abstract

The invention discloses a motor-driven non-contact shock excitation device and a shock excitation method of the motor-driven non-contact shock excitation device. The motor-driven non-contact shock excitation device comprises a stepping motor, a subdivision actuator, a coupler, two supporting bearings, an eccentric shaft, a linear guide rail and two sliding blocks, a connection rod, an electricity permanent magnet and an armature, a strain foil bridge, a strain signal conditioning circuit, an alternating current / direct current (A / D ) converter and an industrial computer. The shock excitation device is a slider-crank mechanism as a whole, the eccentric shaft is driven by the stepping motor to rotate, the stepping motor drives the electricity permanent magnet to move on the linear guide rail in a reciprocation mode, the thickness of the air gap between the electricity permanent magnet and the armature is changed, and the dynamic shock excitation electromagnetic force is generated. The motor-driven non-contact shock excitation device can impose the large margin period excitation force or the sine excitation force on a rotary shaft, and is suitable for testing the dynamic characteristic of a high-rigidity sliding thrust bearing.

Description

technical field [0001] The invention belongs to the technical field of power equipment, and specifically relates to a non-contact vibration excitation device driven by a motor and a vibration excitation method thereof, which are mainly suitable for testing the dynamic stiffness of an oil film of a high-rigidity thrust bearing. Background technique [0002] The stability and reliability of machinery have been paid more and more attention. Therefore, before the mechanical equipment is put into use, it is necessary to fully grasp and be able to predict the various performances of the equipment. The dynamic characteristics of the support bearings affect the critical speed of the rotor, the unbalance response and the stability of the rotor. For the sliding bearing-rotor system, it is very important to correctly predict the dynamic characteristic coefficient of the sliding bearing oil film. [0003] The dynamic characteristic coefficient of the thrust sliding bearing oil film is ...

Claims

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Application Information

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IPC IPC(8): G01M7/02
Inventor 徐华熊显智王琳付玉敏周夕维
Owner XI AN JIAOTONG UNIV
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