Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Bearing fault detection method

A fault detection and bearing technology, applied in the direction of mechanical bearing testing, etc., can solve problems such as manual comparison, achieve the effect of improving efficiency and accuracy, realizing automation and intelligence, and being easy to implement

Inactive Publication Date: 2015-05-13
DALIAN SCI TEST & CONTROL TECH INST
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent discloses an automatic rolling bearing fault diagnosis system with application number 200610017613.1, which involves various methods such as power spectrum, cepstrum, and wavelet transform. The final result is compared with the calculated fault characteristic frequency to obtain the fault type, but the fault Manual comparison is still required in the discrimination stage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bearing fault detection method
  • Bearing fault detection method
  • Bearing fault detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the steps of bearing fault detection are:

[0032] 1. Fix the vibration sensor (HD-ST-3), fixed bracket and power amplifier on the workbench of the test machine tool, fix the bearing to be tested on the rotary shaft of the machine tool platform, fix the bearing position with the fixed bracket, and keep the outer ring stationary Without moving, the inner ring rotates with the rotary shaft. Adjust the vibration sensor so that it is in light contact with the outer ring of the bearing. The power amplifier is used to amplify the vibration signal collected by the vibration sensor, which is beneficial to subsequent software analysis. Connect the vibration sensor to the acquisition card (NI9234) with a data transmission line, connect the output end of the acquisition card to the computer, and send the signal sent by the vibration sensor to the computer through the acquisition card.

[0033] 2. Test parameter setting, input the parameters of the bea...

Embodiment 2

[0046] Another bearing is tested according to the steps and conditions in Example 1, wherein: the number of rolling elements z =7, rolling body diameter d =3.969 mm, bearing outer diameter 22mm, bearing inner diameter 8mm, contact angle 0°, bearing pitch circle diameter D=(bearing outer diameter + bearing inner diameter) / 2=15mm, rotation frequency of the machine tool f =25Hz (that is, the rotation frequency of the bearing).

[0047] According to the calculation formula, the computer calculates the fault characteristic frequency as: =110.7Hz, =64.3Hz, =87.9Hz, =9.2Hz. Power spectrum analysis shows that there is a line spectrum at a frequency of 9.2Hz, indicating that the bearing is faulty with a cage, see Figure 4 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A bearing fault detection method includes six steps of collecting signals, obtaining the fault character frequency, conducting analysis, conducting filtering, extracting thresholds and distinguishing faults. The method has the advantages that the characteristic result of an envelope spectrum is extracted by comprehensively using a power spectrum and wavelet conversion, whether a line spectrum in the bearing detection process is an interference spectrum or a fault line spectrum is judged, and the bearing detection efficiency and accuracy are effectively improved. The method is simple, small in calculation amount and easy to achieve, the detection result can be displayed in a computer in real time, and the automated and intelligent bearing detection is completely achieved.

Description

technical field [0001] The invention relates to a bearing fault detection method, in particular to a method for bearing fault detection by using bearing line spectrum extraction and discrimination. Background technique [0002] Rolling bearings are key components commonly used in mechanical equipment. Whether their working status is normal or not is directly related to the production quality and safety of the entire unit and even the entire production line. Compared with other mechanical parts, rolling bearings have a prominent feature: their life spans are highly discrete, that is, some bearings have greatly exceeded the design life and still work intact, while some bearings fail far before reaching the design life. In actual work, if the bearing is used directly without testing whether it is good or bad, when the equipment breaks down and needs to be repaired, it will greatly increase the difficulty of fault detection and maintenance costs. Therefore, after the bearing l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01M13/04
Inventor 王杨高峰贾兵
Owner DALIAN SCI TEST & CONTROL TECH INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com