Fault Diagnostic System for Centrifugal Milk Separator’s Rotor Bearings with Vibration Isolators

Trumpa, Andrius; Vekteris, Vladas; Mokšin, Vadim; Kilikevičius, Artūras

doi:10.17559/tv-20160501130126

“…1. In terms of fault diagnosis, this bearing-rotor system is difficult to diagnose as it is not possible to measure its vibrations due to the interference of vibration suppression system, which influences measurement results [1,2]. One of the most important tasks of diagnostic simulation is the modelling of real dynamic systems using mathematical models, robust algorithms and computer software.…”

Section: Object Of the Researchmentioning

confidence: 99%

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2022

Teh. vjesn.

0

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This paper analyses the dynamic behaviour of centrifugal milk separator's bearing-rotor system equipped with vibration absorbers. It is shown that rotational milk motion inside the separator causes a centrifugal force that increases dynamic unbalance of the rotor and has a negative effect on performance of the bearings. Mathematical simulation of bearing-rotor system has shown that the rotor rotates at frequency that is outside the resonant frequency region and the amplitude resonances are associated with the bearings and the components of step-up gear. Investigations of vibration transmissibility of vibration damping system have shown that the resonant frequencies are outside the rotor resonance interval and damping system suppresses the effect of separator with milk on rotor bearings and housing. However, it distorts results of diagnostic measurements. Experimental studies confirmed the last statement and showed that results of indirect (through the housing) vibration measurements cannot be used to diagnose the state of damped bearing-rotor system.

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“…Forces caused by unbalance or centrifugal forces are considered as the excitation forces. Bearing-rotor system of modern centrifugal milk separator requires precise and reliable fault diagnostics [1,2]. The centrifugal effect of moving mass (milk), motor, gearbox and the unbalance of the rotor are the main sources of vibration in centrifugal separators.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Dynamics of Damped Bearing-Rotor System of Centrifugal Milk Separator

Trumpa

¹

,

Mokšin

²

,

Turla

³

et al. 2022

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This paper analyses the dynamic behaviour of centrifugal milk separator's bearing-rotor system equipped with vibration absorbers. It is shown that rotational milk motion inside the separator causes a centrifugal force that increases dynamic unbalance of the rotor and has a negative effect on performance of the bearings. Mathematical simulation of bearing-rotor system has shown that the rotor rotates at frequency that is outside the resonant frequency region and the amplitude resonances are associated with the bearings and the components of step-up gear. Investigations of vibration transmissibility of vibration damping system have shown that the resonant frequencies are outside the rotor resonance interval and damping system suppresses the effect of separator with milk on rotor bearings and housing. However, it distorts results of diagnostic measurements. Experimental studies confirmed the last statement and showed that results of indirect (through the housing) vibration measurements cannot be used to diagnose the state of damped bearing-rotor system.

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A Review on Vibration-Based Condition Monitoring of Rotating Machinery

Tiboni

¹

,

Remino

²

,

Bussola

³

et al. 2022

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Monitoring vibrations in rotating machinery allows effective diagnostics, as abnormal functioning states are related to specific patterns that can be extracted from vibration signals. Extensively studied issues concern the different methodologies used for carrying out the main phases (signal measurements, pre-processing and processing, feature selection, and fault diagnosis) of a malfunction automatic diagnosis. In addition, vibration-based condition monitoring has been applied to a number of different mechanical systems or components. In this review, a systematic study of the works related to the topic was carried out. A preliminary phase involved the analysis of the publication distribution, to understand what was the interest in studying the application of the method to the various rotating machineries, to identify the interest in the investigation of the main phases of the diagnostic process, and to identify the techniques mainly used for each single phase of the process. Subsequently, the different techniques of signal processing, feature selection, and diagnosis are analyzed in detail, highlighting their effectiveness as a function of the investigated aspects and of the results obtained in the various studies. The most significant research trends, as well as the main innovations related to the various phases of vibration-based condition monitoring, emerge from the review, and the conclusions provide hints for future ideas.

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Fault Diagnostic System for Centrifugal Milk Separator’s Rotor Bearings with Vibration Isolators

Cited by 3 publications

References 9 publications

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Untitled

Investigation of Dynamics of Damped Bearing-Rotor System of Centrifugal Milk Separator

A Review on Vibration-Based Condition Monitoring of Rotating Machinery

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