Mechanical vibration analysis and fault simulation test system

1Main functionsAnd its characteristics：

The mechanical vibration analysis and fault simulation test bench is a platform that simulates various faults of mechanical moving components for vibration testing, diagnosis, and analysis. Its main functions are:

a、 Rolling bearing fault simulation: It is convenient to replace the tested part of the bearing with a defective one. The faults that can be simulated include: damage to the inner ring, outer ring, and ball bearings of the bearing.

b、 Gear fault simulation: By replacing defective gears, various gear faults can be simulated (three spare gears are provided, which can be used to process cracks, broken teeth, and wear according to requirements).

c、 Shaft system fault simulation: By adjusting the balance weight on the rotating disk on the shaft, it is possible to simulate shaft imbalance (or impeller imbalance) defects; Adjusting the installation position of the axle seat chassis can simulate the defect of misaligned axle installation.

d、 The fault characteristics of variable speed and variable load simulation under different speed conditions, with a variable speed range of 75-1450 Rpm.

e、 The belt shakes.

f、 Simulation of bolt pre tightening force (bolt loosening) fault.

The fault simulation test bench adopts modular design, powerful functions, and stable performance, and can simulate various mechanical faults; It can be used to study resonance, variable speed, variable load, gearbox and belt drive fault diagnosis, vibration transmission process and mechanism, the relationship between vibration, motor current and noise, and is a validation of a new fault diagnosis method.

2. Fault diagnosis method:

Along with supporting softwareUTekSs and uTekFreq can be used to complete:

Fault diagnosis method for rolling bearings:Resonance demodulation spectrum method, pulse impact meter method, characteristic parameter diagnosis method;

Gear fault diagnosis method:Micro angular velocity fluctuation method, sideband method, inverse frequency spectrum method, resonance demodulation spectrum method, ghost line method, testing gear wear, tooth breakage, peeling, pitch error, etc;

Diagnosis method for misalignment fault of shaft system:Phase method, harmonic method;

Unbalance fault diagnosis method:Absolute error free phase method, spectrum method, and on-site dynamic balancing;

Belt vibration test:Micro angular velocity fluctuation method;

Diagnosis method for bolt pre tightening fault:Dual channel phase method, single channel harmonic method

Structural fault diagnosis method:Modal analysis method;

Diagnostic testing method for torsional vibration faults:Various faults can be diagnosed through the micro angular velocity fluctuation method.

3、 Experimental project

（1） Simulation and Diagnosis of Rolling Bearing Faults

1. Experimental purpose

（1) Familiar with the use of commonly used signal analysis instruments;

（2) Understand the structure, characteristic frequency, and installation of conventional rolling bearings;

（3) Master the vibration measurement and analysis methods of rolling bearings.

By using vibration analysis methods, the measurement and analysis of rolling bearing vibration signals can be completed, thereby improving students' abilities in data acquisition, rolling bearing vibration analysis and status assessment, fault diagnosis, and other aspects.

2. Experimental content

（1) Normal bearings

（2) Simulate damage to the inner ring of the bearing

（3) Simulate damage to the outer ring of the bearing

（4) Simulate bearing rolling element damage

3. Diagnostic methods

（1) Resonance demodulation spectroscopy method

（2) Pulse impact meter method

（3) Characteristic parameter diagnosis method

（4) Micro speed fluctuation method

4. Fault diagnosis of rolling bearings