Experimental study of the process of the static and dynamic balancing of the axial fan impeller by ball auto-balancers
DOI:
https://doi.org/10.15587/1729-4061.2017.96374Keywords:
axial fan, aerodynamic unbalance, vibration acceleration, auto-balancer, dynamic balancing, transition processesAbstract
The process of the static and dynamic balancing of the impeller of the axial fan by ball auto-balancers is experimentally investigated. The influence of auto-balancers on sections of the racing and the run-out of the fan and the efficiency of the auto-balancers in the cruising sections are studied.
It is shown that the vibrations of the impeller occur with the frequency of its rotation. This means that the usual and aerodynamic unbalances are the main sources of vibrations and they are similar to each other; both unbalances give rise to vibrations with the rotor frequency.
It is shown that the impeller has two resonant frequencies (although the impeller itself is a short rotor and has one resonant frequency). This is because the impeller is mounted into a massive corps and dynamically it behaves like a long rotor. The larger resonant frequency of the impeller is almost 2 times lower than its operating frequency. Therefore, it falls into the area of the beginning of balancing with a margin.
It is shown that the presence of one auto-balancer does not worsen the racing process of the fan.
It is shown that in the run-out when the rotor passes through the resonant velocities, the value of the vibration accelerations and the duration of the passage of the velocities:
– in the presence of one auto-balancer are decreased insignificantly by 20–40 %;
– in the presence of two auto-balancers are decreased significantly by 60–80 %.
These are explained by the following: in auto-balancers at the run-out there is retention of the balls and balls are retained in the balancing positions almost until the rotor stops.
It is shown that dynamic balancing occurs faster than static balancing.
It is shown that on the cruising steady motion:
– one auto-balancer, mounted from the side of the impeller (the shank), significantly reduces vibration accelerations in its plane and almost does not reduce vibration accelerations from the side of the shank (the impeller);
– two auto-balancers significantly reduce the vibration accelerations of the impeller in all planes.
It is shown that the attachment of additional masses to the fan protective casing reduces its vibrations, but does not reduce the loads on the bearings.
References
- Polyakov, V., Skvortsov, L. (1990). Nasosy i ventylatory [Pumps and Fans]. Moscow: Stroyizdat, 336.
- Iatsenko, V. (2009). Disbalans kak odna iz prichin vibratsii rotornykh shakhtnykh mashin [Disbalance as a Cause of Vibration of Mine Stationary Machine Rotors]. Scientific papers of Donetsk National Technical University. Series Mining electromechanical, 17 (157), 284–291.
- Ziborov, K., Vanga, G., Marenko, V. (2013). Disbalans kak odin iz osnovnykh faktorov, vliyayushchikh na rabotu rotorov shakhtnykh ventilatorov glavnoho provetrivaniya [Imbalance As A Major Factor Influencing The Work Rotors Mine Main Fan]. Modern engineering. Science and education, 3, 734–740. Available at http://www.mmf.spbstu.ru/mese/2013/734_740.pdf
- Korneev, N. (2008). Aerodinamicheskiy disbalans turbogeneratorov i algoritmy eho prognozirovaniya [Aerodynamic disbalance of the turbocompressor as the reason of lowering of power indexes of internal combustion engines]. Machine Builder, 10, 24–27.
- Korneev, N., Polyakova, E. (2014). Raschet aerodinamicheskoho disbalansa rotora turbokompresora DVS [The calculation of the aerodynamic the disbalance rotor of turbocharger ICE]. Machine Builder, 8, 13–16.
- Korneev, N., Polyakova, E. (2014). Aerodinamicheskiy disbalans turbokompressora kak prichina snizheniya energeticheskikh pokazateley dvigatela vnutrenneho zgoraniya [Aerodynamic disbalance of the turbocompressor as the reason of lowering of power indexes of internal combustion engines]. Appliances engineering, 21 (1), 51–57.
- Suvorov, L. (2009). Pat. No. 2419773 RU. Sposob nizkooborotnoy balansirovki massy i aerodinamiki vysokooborotnovo lopatochnovo rotora [Procedure for low speed mass balancing and aerodynamics of high speed vane rotor]. IPC G01M 1/00 (2006.01). No. 2009109011/28; declareted: 11.03.2009; published: 27.05.2011, Bul. No. 15.
- Kim, J.-H., Ovgor, B., Cha, K.-H., Kim, J.-H., Lee, S., Kim, K.-Y. (2014). Optimization of the Aerodynamic and Aeroacoustic Performance of an Axial-Flow Fan. AIAA Journal, 52 (9), 2032–2044. doi: 10.2514/1.j052754
- Gusarov, A. (2002). Avtobalansirujushhie ustrojstva prjamogo dejstvija [Auto-balancers direct action devices]. Мoscow: Nauka, 119.
- Yatsun, V., Filimonihin, G. (2008). Eksperymentalne doslidzhennya efektyvnosti zrivnovazhennya krylchatok ocevykh ventylatoriv pasyvnymy avtobalansyramy [Experimental study of the efficiency of equilibration of impellers of axial fans by passive auto-balancers]. Konstruyuvannya, vyrobnytstvo ta eksplyatatsiya silskohospodarskykh mashyn, 38, 100–105.
- Filimonikhin, G., Olijnichenko, L. (2011). Eksperymentalne vyznachennya efeknyvnosti dynamichnoho zrivnovazhennya kulevymy avtobalansyramy krylchatky ocevoho ventylatora [Experimental determination of the efficiency of dynamic balancing by ball-type auto-balancers of the impeller of axial fan]. Automation products. Machine build processes and instrument, 45, 496–503.
- DeSmidt, H. A. (2010). Automatic Balancing of Bladed-Disk/Shaft System via Passive Autobalancer Devices. AIAA Journal, 48 (2), 372–386. doi: 10.2514/1.43832
- Filimonikhin, G., Olijnichenko, L. (2015). Investigation of the possibility of balancing aerodynamic imbalance of the impeller of the axial fan by correction of masses. Eastern-European Journal of Enterprise Technologies, 5 (7 (77)), 30–35. doi: 10.15587/1729-4061.2015.51195
- Goncharov, V., Filimonikhin, G., Nevdakha, A., Pirogov, V. (2017). An increase of the balancing capacity of ball or roller-type auto-balancers with reduction of time of achieving auto-balancing. Eastern-European Journal of Enterprise Technologies, 1 (7 (85)), 15–24. doi: 10.15587/1729-4061.2017.92834
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2017 Lubov Olijnichenko, Valery Goncharov, Valerii Sidei, Olga Horpynchenko
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
