In this paper, the vibration signals of rolling bearings are detected by sensors for fault detection and diagnosis, and different vibration signals of different rolling bearings under different faults can be studied. Taking deep groove ball bearings with outer ring diameters of 50㎜ and 60㎜ as examples, the mechanical structure of the test bench for fault vibration detection of rolling bearings is designed, which consists of power source, reducer, transmission device and clamping device. Its working principle is to collect the vibration signal of the detected point when the bearing is running, draw the frequency spectrum of each monitoring point, and compare it with the reference frequency spectrum database established at the beginning, analyze the frequency points where the vibration level value increases, so as to judge the fault. The experimental platform enables students to establish a deeper understanding of fault diagnosis, a new discipline, especially the vibration diagnosis technology of rolling bearing faults, and further realize the importance of fault diagnosis technology.
Rolling bearing; Fault detection and diagnosis; Vibration diagnosis technology; sensor
abstract
In this paper, the vibration signals of rolling bearings are diagnosed by sensors for fault detection and diagnosis. It can study different types of vibration signals displayed by different bearings. This paper mainly takes the antifriction bearings with diameters of 50 mm and 60 mm as examples to design the experimental platform. It comprises a power source, a gearbox, a transmission device and a charging device. Its working principle is to collect the vibration signal of the measured point when the rolling bearing rotates through the sensor, and then draw the frequency spectrum, and then compare it with the established database. Analyze the place where the vibration value increases, and then judge the location and type of the fault. The base can display more subjects about fault diagnosis, especially the topic about fault diagnosis of antifriction bearings. Understanding the importance of fault diagnosis.
Keywords rolling bearing fault detection and diagnosis vibration diagnosis technology sensor
catalogue
Abstract Ⅰ
Ⅱ Introduction to Chapter 1 1
1. 1 project background
1. 1. 1 subject source and research purpose and significance 1
1. 1.2 Development Status of Fault Diagnosis Technology 1
1. 1.3 rolling bearing fault diagnosis technology 2
1.2 Content 3 of this article
1.3 Summary of this chapter 3
Chapter II Overall Design of Rolling Bearing Fault Detection Test Bench 4
2. 1 functional requirement analysis of experimental platform 4
2.2 Suggestions and evaluation of vibration test experimental platform 4
2. 1. 1 Determination of basic parameters 4
2. 1.2 Determination and evaluation of design scheme 4
2.3 Overview of this chapter 5
Chapter III Design of Transmission Components of Test Bench 6
3. 1 motor selection 6
3. 1. 1 Select motor type and structure type 6
3. 1.2 Determine the capacity of the motor 6
3.2 Design of Reducer 8
3.2. 1 gear design 8
3.2.2 Lubrication and sealing of reducer and selection of accessories 16
3.3 Selection of Coupling and Design of Flange 17
3.3. 1 coupling type selection 17
3.3.2 Selection of coupling size and model 17
3.3.3 Design of Flange 17
3.4 Overview of this chapter 18
Chapter IV 19 Structural Design of Card Loading Mechanism of Test Bench
4. 1 structural design of bearing box 19
4. 1. 1 Stiffness and concentricity of supporting parts 19
4. 1.2 Axial fastening of the tested rolling bearing 19
4. 1.3 Adjustment of bearing clearance to be measured 20
4. 1.4 Pre-tightening force of the tested rolling bearing. 20
4. 1.5 Lubrication of tested rolling bearing 20
4. 1.6 Sealing device of the tested rolling bearing 2 1
4. 1.7 design of the loading device for the mounting shaft of the tested rolling bearing 22
4. 1.8 Design and verification of the mounting shaft of the tested rolling bearing 22
4. 1.9 design of guide rail 24
4.2 Design of Chuck 25
4.3 Overview of this chapter 26
Chapter 5 Selection and Installation of Sensors 27
5. 1 sensor selection 27
5.2 Sensor installation
5.3 Overview of this chapter 34
Chapter VI Economic and Technical Analysis of Test Bench 35
6. 1 Rationality of system structure design 35
6.2 Economy of system design 35
Material selection 35
Power supply 35
6.2.3 Use, Maintenance and Maintenance 36
6.3 Overview of this chapter 36
Conclusion 37
Confirmation 38
Reference 49
Appendix 1 40
Appendix 2 49 The above answers come from:/html/44-6/6168.htm.