Motor vibration characteristic frequency detection device and method

A technology of characteristic frequency and detection device, which is applied in the direction of measurement device, vibration test, and test of machine/structural components, etc., can solve the problems of inability to obtain the characteristic frequency of equipment, complex structure, etc., and achieves low test cost, good repeatability, high impact small effect

Active Publication Date: 2017-10-13
HARBIN ENG UNIV
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Problems solved by technology

However, in engineering applications, due to the complex structure of the equipment, it

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  • Motor vibration characteristic frequency detection device and method
  • Motor vibration characteristic frequency detection device and method
  • Motor vibration characteristic frequency detection device and method

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention is described in more detail:

[0023] The device of the present invention includes a mounting base 5, a vibration isolator 4, a flywheel disc 6, an air bearing 7, an elastic coupling 9, an acceleration sensor 1, and a vibration test analyzer 2 to measure the characteristic frequency of the motor 3. Two specific implementation technical solutions are given below for the horizontal installation and vertical installation of the motor:

[0024] Technical solution one:

[0025] Such as figure 1 As shown, a detection device for the vibration characteristic frequency of a motor of the present invention includes that the mounting flange of the motor 3 is horizontally installed on the mounting base 5 through the vibration isolator 4, and the mounting base 5 is placed horizontally, and the upper surface is also in a horizontal state. In order to reduce the influence of the base on the vibration of the motor, ...

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Abstract

The invention provides a motor vibration characteristic frequency detection device. The device comprises a mounting base, a flywheel disk, counterweight mass blocks, an air flotation bearing, a flexible coupling, a carrying shaft, an acceleration sensor, a vibration test analyzer and a vibration isolator; a motor is mounted on the mounting base through the vibration isolator; the shaft of the motor is connected with the carrying shaft through the elastic coupling; the carrying shaft is supported by the air flotation bearing; the carrying shaft is provided with the flywheel disk; inertia adjustment holes are evenly distributed in the flywheel disk along a radial direction; the counterweight mass blocks are installed in the inertia adjustment holes; and the acceleration sensor is mounted on the outer surface of the motor and is connected with the vibration test analyzer through a wire. The motor vibration characteristic frequency detection device of the invention has the advantages of convenient installation and adjustment, low test cost, long sampling time, fast separation, adjustable load inertia and high repeatability. The influence of external vibration on motor test vibration is small; and an electromagnetic excitation frequency and a natural frequency can be detected and separated out with only one-time signal continuous acquisition required.

Description

technical field [0001] The invention belongs to the field of motor vibration, and in particular relates to a detection device for the vibration characteristic frequency of a motor, and also relates to a detection method for the vibration characteristic frequency of a motor. Background technique [0002] Electric motors are very common in engineering applications, and squirrel-cage asynchronous motors play a pivotal role because of their simple structure, low price, and long service life, and are widely used. With the increasing requirements of production on the reliability of the control system, many motors need to test the reliability of their operation, and the characteristic frequency of the motor is an important object of investigation. Due to the diversity of operating modes, in the process of detection and fault diagnosis, it is necessary to use different methods to extract fault features for different operating modes. It is often necessary to test the characteristic ...

Claims

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Application Information

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IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 黄健哲闫东生王东华卢熙群吴江飞焦殿霖孔德峰郝玉涛
Owner HARBIN ENG UNIV
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