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Ultrasonic radial bearing friction torque and high-speed operation stability testing device

A technology for stability testing and radial bearings, applied in mechanical bearing testing, measuring devices, force/torque/power measuring instruments, etc., can solve problems such as bearing damage, achieve good real-time performance, and scientific and reasonable structural design and measurement schemes , the effect of strong flexibility

Inactive Publication Date: 2020-03-27
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the bearing-rotor system is unstable, the outer circle of the rotor will rub or scrape against the inner ring of the bearing, causing the bearing to be damaged

Method used

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  • Ultrasonic radial bearing friction torque and high-speed operation stability testing device
  • Ultrasonic radial bearing friction torque and high-speed operation stability testing device
  • Ultrasonic radial bearing friction torque and high-speed operation stability testing device

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Experimental program
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Embodiment Construction

[0032] Below in conjunction with embodiment the present invention will be further described.

[0033] Such as Figure 1-5 As shown, an ultrasonic radial bearing friction torque and high-speed running stability test device includes a vibration isolation platform 1, an airtight cover 2, a bearing rotor system 3, an axis track measurement system 4 and a data acquisition and control system 5, the The airtight cover 2 covers the bearing rotor system 3 installed on the vibration isolation platform 1,

[0034] The airtight cover 2 is connected to the vibration isolation platform 1 by bolts. According to the wiring design requirements, the airtight cover 2 has an airtight cover outlet hole 2-1 at the top and near the installation plane, and the laser displacement sensor 4- 1, the power supply line of the motor 3-13, and the connecting wire of the motor driver 5-9 pass through the outlet hole 2-1 of the airtight cover; for the convenience of observation and to ensure a certain strengt...

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Abstract

The invention discloses an ultrasonic radial bearing friction torque and high-speed operation stability testing device, and relates to a friction torque operation stability measuring method of an ultrasonic radial bearing during high-speed operation. According to a current feedback method, the friction torque of the bearing during high-speed operation can be calculated through the current value output by the current detection port of the motor driver. By means of the laser displacement sensors arranged in the horizontal direction and the vertical direction, a track diagram of the center of thebearing rotor can be measured. A combined time-frequency spectrogram of a bearing rotor center track can be obtained by using a short-time Fourier transform method, and then the high-speed operationstability of the ultrasonic bearing rotor is judged. An xPC-Target system is adopted in the rotor rotating speed control and motor load current measurement process, and the real-time performance of the control and data acquisition process is ensured. The device is used for measuring the friction torque during high-speed operation of the ultrasonic radial bearing and judging the high-speed operation stability of the bearing supporting rotor.

Description

technical field [0001] The invention belongs to the technical field of bearing performance testing, in particular to an ultrasonic radial bearing friction torque and high-speed running stability testing device. Background technique [0002] The magnitude and fluctuation of the friction torque of ultrasonic bearings have an important influence on the dynamic characteristics and running accuracy of the bearings. As a non-contact bearing with air as the working medium, ultrasonic bearings show different friction characteristics in high-speed operation compared with low-speed operation. Using the current feedback method, the friction torque of the ultrasonic bearing under the above-mentioned different working conditions can be measured, and the influence law of the bearing speed on its friction torque can be obtained. When the bearing is running at high speed, factors such as the dynamic unbalance of the rotor, the installation accuracy of the bearing, and the vibration of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04G01L5/00G01B11/02
CPCG01B11/02G01L5/0009G01M13/04
Inventor 李贺王禹孙伟姚燕安
Owner SHANDONG UNIV OF SCI & TECH
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