Vibrodiagnostics of Rolling Ball Bearings Connected With Processing, Result´s Comparison and Prediction of Service Life

Abstract

This article deals with vibration analysis and the processing of the vibration signal obtained during the experimental measurement on a rotary shaft at start-up, constant speed and run-out, with rolling ball bearings. The next step of the research is the introduction and application of mathematical and numerical methods for the processing of input and measured data using diagnostic and mathematical software. The principle of measurement and processing was to compare the results of oscillation of an undamaged bearing with several types of damaged bearings with corresponding deformations in the orbits/raceways. The purpose of this research and comparison was to achieve optimal results (in terms of amplitude values, the occurrence of eigenvalue vibrations and the resonance phenomenon) of individual bearings with corresponding deformations in the raceways and to obtain calibration diagrams as a tool for possible prediction of bearings in operation.

Analysis of insulating parameters of oil transformer by time and frequency methods

“…Applying a sinus frequency sweep in wide range means to measurement the dielectric response in depending on quality transformer insulate [13], [14].…”

Novel Design of Variable Stiffness Pneumatic Flexible Shaft Coupling: Determining the Mathematical-Physical Model and Potential Benefits

“…Presently, minimizing the vibration and noise of mechanical system drives has become increasingly important and demanding [1,2]. The entire issue is very extensive and includes aspects such as safety and lifetime of machines [3][4][5][6][7][8][9] and protection of workers against noise and vibration [10,11]. In the field of piston combustion engines, as a source of vibration, emphasis is placed on improving their efficiency and reducing emissions [12][13][14].…”