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Super-miniature rotor dynamic balancing measuring method and equipment for complementing the same

A technology of ultra-miniature rotor and measurement method, which is applied in the field of ultra-miniature rotor dynamic balance measurement method and the equipment implementing the method, which can solve the problems of difficult separation of unbalanced signals, small signals, and low balance speed, and improve the signal-to-noise ratio Effect

Active Publication Date: 2015-07-15
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low balance speed, the signal caused by the unbalance is too small, the signal-to-noise ratio is small, and it is also difficult to separate the unbalanced signal
[0005] To sum up, there is currently no device on the market that can perform dynamic balance measurements on ultra-miniature rotors.

Method used

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  • Super-miniature rotor dynamic balancing measuring method and equipment for complementing the same
  • Super-miniature rotor dynamic balancing measuring method and equipment for complementing the same
  • Super-miniature rotor dynamic balancing measuring method and equipment for complementing the same

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Embodiment Construction

[0033] Embodiment 1 of the ultra-miniature rotor dynamic balance measuring method of the present invention, as Figure 1-5 As shown, the following steps are included: 1) Install a single-degree-of-freedom damping device on the support device for supporting the ultra-micro rotor to be tested, and place the support device at the resonance point of the dynamic balancing machine. In this embodiment, The support device includes a V-shaped support block 11 and a support member 12 located at the bottom of the support block. The stiffness of the support member 12 is adjustable. In this embodiment, the support member 12 adopts a thin sheet soft spring, and there are two support devices. The two supporting devices are sequentially arranged along the axial direction of the ultra-miniature rotor 13 to be tested. In this embodiment, the damping device adopts an oil damper 14, and the damping devices are respectively located on both sides of the supporting device. Figure 2-3 The supporting...

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Abstract

The invention relates to the technical fields of machinery dynamics and vibration measurements, in particular to a super-miniature rotor dynamic balancing measuring method and equipment for complementing the super-miniature rotor dynamic balancing measuring method. The method includes the following steps: (1) arranging a damping device on a bearing device, wherein the damping device is a single freedom degree damping device, and arranging the bearing device at the position of a resonance point of a dynamic balancer through a bearing piece; (2) arranging a to-be-tested super-miniature rotor on the bearing device; (3) driving and connecting a motor for the to-be-tested super-miniature rotor; (4) starting the dynamic balancer and the motor; (5) adjusting a damping coefficient of the damping device, stiffness of the bearing device, and balance revolving speed of the to-be-tested super-miniature rotor so as to enable resonance frequency and amplitude of the to-be-tested super-miniature rotor to reach a set value; (6) measuring a vibration signal of the to-be-tested super-miniature rotor and then after the vibration signal is amplified, analyzed and processed, transmitting the vibration signal to a computer; and (7) obtaining a measured result processed by the computer. The method and the equipment can achieve measurement to dynamic balance of the super-miniature rotor under the lower speed.

Description

technical field [0001] The invention relates to the technical field of mechanical dynamics and vibration testing, in particular to a method for measuring the dynamic balance of an ultra-miniature rotor and equipment for implementing the method. Background technique [0002] Due to its small mass (less than 10g), small size (diameter less than 10mm), and an aspect ratio close to 1, the dynamic balance of ultra-miniature rotors is very difficult. Due to the high working speed and high requirement on balance precision, the existing dynamic balancing methods of soft support and hard support cannot effectively realize the measurement of unbalance of ultra-miniature rotors. [0003] For the soft bearing dynamic balancing machine, the balance speed is above the resonance point of the system, so the balance speed is required to be high. In addition to easily damaging the rotor supporting surface, the self-excited vibration of the system will also be caused by the change of the fric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/16
Inventor 李济顺马伟杨芳隋新刘春阳薛玉君
Owner HENAN UNIV OF SCI & TECH
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