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Accurate controllable non-contact test piece rotary magnetic field fatigue excitation and vibration test device

A non-contact, rotary technology, applied in the direction of measuring devices, vibration testing, machine/structural components testing, etc., can solve the problems of less vibration characteristic devices and increase the complexity of test devices, etc., and achieve accurate and reliable speed adjustment Convenience and controllability

Active Publication Date: 2016-08-31
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the use of wired sensors for vibration measurement of rotating specimens will increase the complexity of the test device, and its fatigue vibration test is a difficult point in the field of vibration testing. At present, there are few devices for testing the vibration characteristics of rotating specimens

Method used

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  • Accurate controllable non-contact test piece rotary magnetic field fatigue excitation and vibration test device
  • Accurate controllable non-contact test piece rotary magnetic field fatigue excitation and vibration test device
  • Accurate controllable non-contact test piece rotary magnetic field fatigue excitation and vibration test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This embodiment is aimed at rotating specimens.

[0053] A precise and controllable non-contact test piece rotating magnetic field fatigue excitation and vibration measurement device, including vibration-reducing and insulating fixture 2, vibration absorber 3, dynamic balance device 4, vibration exciter 7, electromagnetic piezoelectric coupling vibration measurement sensor 8 , Test bench 14, transmission device and precise control device.

[0054] see figure 1 , the electromagnet support frame 11 is installed on the table of the test bench 14 . The electromagnet support frame 11 is U-shaped, and a through hole is provided in the center of its bottom plate, and a vibration exciter clamping platform 9 and an electromagnetic piezoelectric coupling vibration measuring sensor clamping platform 10 are provided on the inner walls of its two side plates.

[0055] see first Figure 6 to Figure 11 , the part of the electromagnetic piezoelectric coupling vibration measuring sen...

Embodiment 2

[0088] This embodiment is aimed at static test pieces.

[0089] The implementation mode and principle of static test pieces are similar to those of rotating test pieces. Specifically, when the test piece is in a static state, the structure and working principle of the clamp, shock absorber, self-locking screw adjustment device and vibration exciter of the present invention are the same as those in the rotating state, and the control device and principle of the vibration source are also the same ; The difference is: cut off the power supply of the stepless speed-adjustable AC motor, so that the test piece is tested in a static state; and the object of the test is wider than that in the rotating state; in addition, the vibration measuring device can be different. In addition to using electromagnetic piezoelectric coupling sensors, the device can also use wired sensors to measure vibration.

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Abstract

The invention provides an accurate controllable non-contact test piece rotary magnetic field fatigue excitation and vibration test device. The device comprises a vibration damping insulation clamp, a vibration damper, a dynamic balance device, a vibration exciter, an electromagnetic piezoelectric coupling vibration sensor, a test station, a transmission device and an accurate control device. The excitation and vibration test device is suitable for rotary test pieces and especially suitable for vibration characteristic researches on a wind power blade, an engine, a turbine blade, a helicopter rotor and a tail rotor blade, the excitation and vibration test device can vividly simulate vibration fatigue states of rotary test pieces respectively under conditions of 360-DEG all directions, same rotating speed and different excitation forces, same excitation force and different rotating speeds, and different rotating speeds and different excitation forces, the excitation and vibration test device can monitor related vibration characteristic parameters such as the excitation force, the vibration displacement, the vibration speed and the vibration acceleration continuously, and the excitation and vibration test device is suitable for vibration fatigue characteristic analysis on stationary test pieces.

Description

technical field [0001] The invention relates to a fatigue excitation and vibration measurement device, in particular to an accurate and controllable non-contact test piece rotating magnetic field fatigue excitation and vibration measurement device. The invention is particularly suitable as a test excitation and vibration measurement device for blades and rotor tail rotors. Background technique [0002] In the field of machinery, the phenomenon of vibration fatigue is ubiquitous. Vibration fatigue is very harmful to mechanical parts. If it is light, it will shorten the service life of the parts; if it is heavy, it will directly damage the parts and make them unusable; it will even endanger personal safety. Therefore, it is very necessary to study the vibration fatigue of mechanical parts, and its application value is huge. To study the vibration fatigue problem in the mechanical field, it is inseparable from the mechanical vibration device. The vibration excitation device ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/022
Inventor 林腾蛟谢道坤
Owner CHONGQING UNIV
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