Vertical rotator dynamic balance detection system without additional sensor

A technology of balance detection and rotating body, which is applied in static/dynamic balance test, machine/structural component test, instrument, etc., to achieve the effect of low cost, error avoidance and convenient production

Active Publication Date: 2012-11-21
KEDE NUMERICAL CONTROL CO LTD
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  • Description
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Problems solved by technology

[0019] This also makes it possible to realize the dynamic balance ...

Method used

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  • Vertical rotator dynamic balance detection system without additional sensor
  • Vertical rotator dynamic balance detection system without additional sensor
  • Vertical rotator dynamic balance detection system without additional sensor

Examples

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Embodiment Construction

[0049] Basic principles such as Figure 5 as shown,

[0050] When an object rotates at an angular velocity ω, the partial velocities of any particle in the XY coordinate system are:

[0051] V X =ω*R*cosθ①

[0052] V y =ω*R*sin ②

[0053] Where θ is the angle between the mass point M and the X axis

[0054] Calculate the first derivative of the formula ①② to get:

[0055] dV x dt = ω * R * sin θ ③

[0056] dV y dt = ω * R * cos θ ④

[0057] Therefore, for the mass point M, the stress in the XY direction is

[0058] f X =ω*R*sin*M⑤

[0059] f y =ω*R*cosθ*M⑥

[0060] It can be seen from the formula ⑤⑥ that when the object rotates at a constant speed, the centripetal stress in the X ...

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Abstract

The invention discloses a vertical rotator dynamic balance detection system without an additional sensor, which is characterized by comprising the following steps: connecting a current sensor with a servo driver for a driving motor of a vertical rotator, inputting into an FIFO (first-in first-out) unit, buffering data, controlling the start of an FFT (fast fourier transform) processor by judging whether data is prepared or not, and converting the time domain signal into the frequency domain signal by the data through the FFT processor; and obtaining the corresponding amplitude-frequency characteristics and phase-frequency characteristics, wherein the amplitude-frequency characteristics reflect the relationship between the relative mass of the eccentric point and the vibration frequency, and the phase-frequency characteristics reflect the relationship between the relative position of the eccentric point and the vibration frequency, thus the dynamic balance state of the vertical rotator is obtained. The vertical rotator dynamic balance detection system without the additional sensor has the advantages of small error, convenience of installation and low cost, thereby being suitable for wide popularization.

Description

technical field [0001] The invention relates to a dynamic balance detection system, in particular to a dynamic balance detection system without additional sensors. Background technique [0002] Commonly used machinery contains a large number of parts for rotating motion, such as various transmission shafts, main shafts, turntables and motors, collectively referred to as gyratory. Ideally, when the revolving body is rotating and not rotating, the pressure on the bearing is the same, and such a revolving body is a balanced revolving body. However, due to various factors such as uneven material or blank defects, errors in processing and assembly, and even asymmetrical geometric shapes in design, the various rotating bodies in the project make the rotating body rotate. The centrifugal inertial force generated by a tiny particle cannot cancel each other out. The centrifugal inertial force acts on the machine and its foundation through the bearing, causing vibration. The amplitud...

Claims

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Application Information

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IPC IPC(8): G01M1/22
Inventor 张赞秋于德海郝天阳李俊隋继平
Owner KEDE NUMERICAL CONTROL CO LTD
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