Experimental Investigation of Pedestal Looseness in a Rotor-Bearing System

Wen Xiu Lu; Fu Lei Chu

doi:10.4028/www.scientific.net/KEM.413-414.599

Paper Titles

A Novel Fault Diagnosis Method Using PCA and ART-Similarity Classifier Based on Yu’s Norm
p.569

Wavelet Selection for Bearing Defect Diagnosis
p.575

Research on Nonlinear Process Monitoring and Fault Diagnosis Based on Kernel Principal Component Analysis
p.583

Shaft Crack Analysis and Diagnosis for the 600MW Steam Turbine Generator
p.591

Experimental Investigation of Pedestal Looseness in a Rotor-Bearing System
p.599

Fault Diagnostics Based on Pattern Spectrum Entropy and Proximal Support Vector Machine
p.607

Signal Processing by Energy Normalization Method Based on Wavelet Packet
p.613

Application of Cyclic Correlation Analysis to Gear Damage Detection
p.621

Feature Extraction for Damage Detection in Structures Based on Nonlinearity Analysis
p.627

HomeKey Engineering MaterialsKey Engineering Materials Vols. 413-414Experimental Investigation of Pedestal Looseness...

Experimental Investigation of Pedestal Looseness in a Rotor-Bearing System

Abstract:

An experimental setup of rotor-bearing system is installed and vibration characteristics of the system with pedestal looseness are investigated. The pretightening bolt between the bearing house and pedestal is adjusted to simulate the pedestal looseness fault. The vibration waveforms, spectra and orbits are used to analyze the nonlinear response of the system with pedestal looseness. Different parameters, including speed, looseness gap, imbalance mass and disk position are changed to observe the nonlinear vibration characteristics. The experiments show that the system motion generally contains the 1/2X fractional harmonic component and multiple harmonic components such as 2X, 3X, etc. Under some special conditions, the pedestal looseness occurs intermittently, that is, occurs in some periods and doesn’t in other periods.