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Device and method for vibration measurement and failure analysis of rolling bearing

A fault analysis method, rolling bearing technology, applied in the direction of measuring devices, vibration measurement in solids, mechanical bearing testing, etc., can solve the problems that the actual reliability of products needs to be further improved

Inactive Publication Date: 2011-09-14
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a large gap between domestic bearing vibration measuring instruments and similar foreign advanced enterprises, and the actual reliability of the products needs to be further improved

Method used

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  • Device and method for vibration measurement and failure analysis of rolling bearing
  • Device and method for vibration measurement and failure analysis of rolling bearing
  • Device and method for vibration measurement and failure analysis of rolling bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: This rolling bearing vibration measurement and fault analysis device, see figure 1 , including a bearing installation device under test (5), a speed sensor (1), a signal conditioning circuit (11), a data acquisition device (10) and a computer (9), characterized in that: firstly, the bearing (2) is installed on the on the bearing mounting device (5). The vibration transmission rod of the speed sensor (1) is placed on the middle plane of the outer cylindrical surface of the bearing outer ring with a specified pressure, and the measurement direction is along the radial direction of the bearing and perpendicular to the axis of the bearing. The radial vibration speed signal of the outer ring of the bearing is measured by the speed sensor (1), and the picked-up radial vibration speed signal of the bearing is converted into a corresponding electrical signal. The electrical signal is sent to the data acquisition device (10) after being processed by the signal con...

Embodiment 2

[0028] Embodiment 2: This embodiment is basically the same as Embodiment 1, and the features are as follows: For the tested bearing installation device, see figure 2 , including main shaft (4), motor (7), inverter (8), mandrel (3), vertical slider (13), vertical locking handle (14), hand wheel (12), horizontal slider (16 ), the horizontal locking handle (17), the knob (15), and the bearing (2) and the corresponding mandrel (3) are installed in the taper hole of the main shaft (4). The rotating speed of the main shaft (4) is adjusted by the frequency converter (8), so that the main shaft (4) drives the bearing (2) to rotate at a constant speed. Loosen the vertical locking handle (14) and the horizontal locking handle (17). Adjust the knob (15) to make the horizontal slider (16) move back and forth to complete the adjustment of the horizontal position of the speed sensor (1). Use the hand wheel (12) to raise or lower the vertical slider (13), adjust the vertical position of t...

Embodiment 3

[0030] Embodiment 3: This rolling bearing vibration measurement and failure analysis method uses the above-mentioned device for testing and analysis, see Figure 5 , the data acquisition card starts to work, A / D conversion is performed on the signal conditioned by the signal conditioning circuit, and the data is stored in the user buffer as a voltage value; digital filtering is performed on the collected bearing vibration speed signal to obtain the filtered low frequency Vibration speed signal, medium frequency vibration speed signal and high frequency vibration speed signal; for the filtered bearing vibration speed signal (50-10000hz), respectively calculate the effective value of vibration speed, vibration speed peak value and crest factor of low frequency, medium frequency and high frequency; The filtered bearing vibration velocity signal (50-10000hz) is subjected to time domain analysis, FFT analysis, envelope spectrum analysis, discrete wavelet analysis, wavelet packet ana...

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Abstract

The invention relates to a device and method for vibration measurement and failure analysis of a rolling bearing. The device comprises a detected bearing mounting device, a speed sensor, a signal conditioning circuit, a data collection device and a computer, wherein a detected bearing is mounted on a mandrel of the detected bearing mounting device; a vibration rod of the speed sensor is arranged on a middle plane of an outer cylindrical surface of an outer ring of the detected bearing with prescribed pressure, the measurement direction is along the radial direction of the bearing and vertical to the axis of the bearing, and the signal conditioning circuit and the data collection device are connected to the computer; the speed sensor measures radial vibration speed signals of the outer ring of the bearing, the picked bearing radial vibration speed signals are converted into corresponding electric signals which are processed by the signal conditioning circuit and then transferred to the data collection device which carries out A / D conversion of the conditioned signals to convert the conditioned signals into digital signals capable of being processed by the computer, and finally the computer carries out analysis and processing of the digital signal. The device and the method are applicable to production test and user acceptance of finished bearings by laboratories and bearing manufacture factories.

Description

technical field [0001] The invention relates to a bearing detection and fault analysis device and method, in particular to a rolling bearing vibration measurement and fault analysis device and method. Background technique [0002] Rolling bearings are precision mechanical parts, widely used in aerospace, high-speed rail, machine tools, vehicles, metallurgy and many other fields of national economy and national defense construction. Bearings are key basic components and indispensable components for supporting and transmitting power in rotating machinery. The quality of the bearing directly affects the accuracy and performance of its supporting host and equipment. Therefore, controlling the quality of bearings can reduce economic losses and prevent accidents, and increase the competitiveness of domestic bearing companies. [0003] Vibration and noise performance, life and reliability are important quality and performance indicators for rolling bearings. The theory of life a...

Claims

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Application Information

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IPC IPC(8): G01M13/04G01H1/14
Inventor 郑敏余光伟王成龙李俊朱贸刘江山
Owner SHANGHAI UNIV
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