Research on Pitting Corrosion Fault Model of Vibrating Screens Rolling Element Bearing

Zhao, Xuan; Guo, Bao Liang; Duan, Zhi Shan

doi:10.4028/www.scientific.net/amm.401-403.254

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…There are several elements of the screen that are especially prone to fail due to operational fatigue. The most important are the springs that suspend the machine [ 36 , 37 ], and bearings that hold the rotating shafts [ 38 , 39 ]. Due to the importance of this type of machine, attempts are made to optimize them at the stage of design based on previous experience [ 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

Model of the Vibration Signal of the Vibrating Sieving Screen Suspension for Condition Monitoring Purposes

Michalak

Wodecki

Drozda

et al. 2020

Sensors

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Diagnostics of industrial machinery is a topic related to the need for damage detection, but it also allows to understand the process itself. Proper knowledge about the operational process of the machine, as well as identification of the underlying components, is critical for its diagnostics. In this paper, we present a model of the signal, which describes vibrations of the sieving screen. This particular type is used in the mining industry for the classification of ore pieces in the material stream by size. The model describes the real vibration signal measured on the spring set being the suspension of this machine. This way, it is expected to help in better understanding how the overall motion of the machine can impact the efforts of diagnostics. The analysis of real vibration signals measured on the screen allowed to identify and parameterize the key signal components, which carry valuable information for the following stages of diagnostic process of that machine. In the proposed model we take into consideration deterministic components related to shaft rotation, stochastic Gaussian component related to external noise, stochastic α-stable component as a model of excitations caused by falling rocks pieces, and identified machine response to unitary excitations.

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Section: Introductionmentioning

confidence: 99%

Model of the Vibration Signal of the Vibrating Sieving Screen Suspension for Condition Monitoring Purposes

Michalak

Wodecki

Drozda

et al. 2020

Sensors

View full text Add to dashboard Cite

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Vibration Behavior of Dual-Rotor Caused by Maneuver Load and Intershaft Bearing Defect

et al. 2023

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This paper concentrates on the vibration amplitude modulation and frequency modulation behavior of a dual-rotor system induced by the maneuver load and defective intershaft bearing. The motion equations of a dual-rotor system are presented by considering the intershaft bearing force with a local defect of the outer raceway and the maneuver load of a barrel-roll flight. The fourth-order Runge–Kutta method is employed to study the vibration responses of the dual-rotor system, which are reflected by the time history curves, the bearing contact force curves, and the Hilbert envelope spectra. It is shown that the rotor responses display impulse vibrations due to the defective intershaft bearing; and the corresponding Hilbert envelope spectra contain defect characteristic frequencies, multiple defect frequencies, side frequencies, and modulation frequencies. The results reveal the frequency modulation behavior of the impulse vibrations induced by the rotating speed ratio and the amplitude modulation behavior influenced by the maneuver load, the bearing defect span, and the rotating speed. Finally, defective intershaft bearing experiments under maneuvering flight are conducted, confirming the availability of the numerical vibration amplitude modulation and frequency modulation behavior. This analysis provides a theoretical foundation for bearing state detection during flight maneuvers.

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Research on Pitting Corrosion Fault Model of Vibrating Screens Rolling Element Bearing

Cited by 2 publications

References 5 publications

Model of the Vibration Signal of the Vibrating Sieving Screen Suspension for Condition Monitoring Purposes

Model of the Vibration Signal of the Vibrating Sieving Screen Suspension for Condition Monitoring Purposes

Vibration Behavior of Dual-Rotor Caused by Maneuver Load and Intershaft Bearing Defect

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