Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Speed-Variant Balancing Method for Flexible Rotary Machines Based on Acoustic Responses

Version 1 : Received: 22 April 2021 / Approved: 23 April 2021 / Online: 23 April 2021 (13:18:55 CEST)

A peer-reviewed article of this Preprint also exists.

Peplow, A.; Isavand, J.; Kasaei, A.; Afzali, B.; Bard-Hagberg, D. A Speed-Variant Balancing Method for Flexible Rotary Machines Based on Acoustic Responses. Sustainability 2021, 13, 7237. Peplow, A.; Isavand, J.; Kasaei, A.; Afzali, B.; Bard-Hagberg, D. A Speed-Variant Balancing Method for Flexible Rotary Machines Based on Acoustic Responses. Sustainability 2021, 13, 7237.

Abstract

As rotary machines have become more complicated, balancing processes have been classified as a vital step in condition monitoring to ensure machines operate both reliably and safely. This is especially important for flexible machines which normally work at rotations speeds above critical limits. Imbalance is a common problem in flexible rotating machinery that can lead to extreme vibration and noise levels. This is one of the major reasons for studying various balancing methods applied to the vibration response of rotating machines. Recently, the relation between acoustic and vibration response during a rotary machine balancing process based on the Four-Run method has been presented for constant speed machines. This method cannot be applied to machines in start-up or shut-off. Hence, by considering the acoustic and vibration responses of a machine between its critical speeds, this research presents a new innovative speed-variant balancing method based on the original Four-Run method, named as "Peak to Peak for Critical Speeds (PPCS)". The proposed method consists of two major types of application: the first is in the Run-up of the machine and the second is in Shut-down. Experimental laboratory results show that the PPCS method can be implemented for speed-variant and flexible rotary machines during run-up or shut-down transient processes based on acoustic and vibration measurements. As a phase-less and a contactless method, the PPCS can be employed as an innovative and readily available method for condition monitoring in the future.

Keywords

flexible rotating machinery; balancing method; speed-variant; acoustic feedback

Subject

Engineering, Automotive Engineering

Comments (0)

Comment 1
Received: 28 April 2021
Commenter: Armin Hekmat
The commenter has declared there is no conflict of interests.
Comment: Is this research method done when starting and shutting down engines for all diesel engines? Or have you considered a specific type of engine in research?
I think this was an interesting article, and researching such cases into the effects of sound motion on engine motion can be very effective.
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