Archives of Acoustics, 41, 2, pp. 285–296, 2016
10.1515/aoa-2016-0028

Vibroacoustic Measurements and Simulations Applied to External Gear Pumps. An Integrated Simplified Approach

Eleonora CARLETTI
C.N.R.-IMAMOTER Institute for Agricultural and Earthmoving Machines of the National Research Council of Italy
Italy

Giuseppe MICCOLI
C.N.R.-IMAMOTER Institute for Agricultural and Earthmoving Machines of the National Research Council of Italy
Italy

Francesca PEDRIELLI
C.N.R.-IMAMOTER Institute for Agricultural and Earthmoving Machines of the National Research Council of Italy
Italy

Giorgio PARISE
C.N.R.-IMAMOTER Institute for Agricultural and Earthmoving Machines of the National Research Council of Italy
Italy

This paper describes the development phases of a numerical-experimental integrated approach aimed at obtaining sufficiently accurate predictions of the noise field emitted by an external gear pump by means of some vibration measurements on its external casing. Harmonic response methods and vibroacoustic analyses were considered as the main tools of this methodology. FFT acceleration spectra were experimentally acquired only in some positions of a 8.5 cc/rev external gear pump casing for some working conditions and considered as external excitation boundary conditions for a FE quite simplified vibroacoustic model. The emitted noise field was computed considering the pump as a ‘black box’, without taking into account the complex dynamics of the gear tooth meshing process and the consequent fluid pressure and load distribution. Sound power tests, based on sound intensity measurements, as well as sound pressure measurements in some positions around the pump casing were performed for validation purposes. The comparisons between numerical and experimental results confirmed the potentiality of this approach in offering a good compromise between noise prediction accuracy and reduction of experimental and modelling requirements.
Keywords: airborne noise; gear pump; vibroacoustic modelling.
Full Text: PDF

References

Bériot H., Prinn A., Gabard G. (2013), On the performance of high-order FEM for solving large scale industrial acoustic problems, Proceedings of 20th International Congress on Sound and Vibration ICSV20, pp. 1–8, Bangkok.

Bonanno A., Pedrielli F. (2008), A study on the structure-borne noise of hydraulic gear pumps, Proceedings of the 7th JFPS International Symposium on Fluid Power, pp. 641–646, Toyama.

Borghi M., Milani M., Paltrinieri F., Zardin B. (2005), Studying the axial balance of external gear pumps, SAE Technical Paper 2005-01-3634.

Borghi M., Milani M., Paltrinieri F., Zardini B. (2008), External gear pumps and motors bearing blocks design: influence on the volumetric efficiency, Proceedings of the 51st National Conference on Fluid Power, pp. 557–571, Las Vegas.

Carletti E., Pedrielli F. (2005), Sound power levels of hydraulic pumps using sound intensity techniques: towards more accurate values?, Proceedings of 12th International Congress on Sound and Vibration ICSV12, pp. 1247–1254, Lisbon.

Carletti E., Pedrielli F. (2006), Measurement uncertainties in the sound power procedures based on sound intensity, Proceedings of 13th International Congress on Sound and Vibration ICSV13, pp. 1–8, Vienna.

De Borst R., CrisfieldM.A., Remmers J.C., Verhoosel C.V. (2012), Non-linear finite element analysis of solids and structures, 2nd edition, John Wiley & Sons, Chichester.

Huang J.K., Chang R.W., Lian Ch.W. (2008), An optimization approach to the displacement volumes for external gear pumps, Materials Science Forum, 594, 57–71.

ISO 9614-1 (1993), Acoustics – Determination of sound power levels of noise sources using sound intensity – Part 1: Measurement at discrete points.

ISO 9614-2 (1996), Acoustics – Determination of sound power levels of noise sources using sound intensity – Part 2: Measurement by scanning.

ISO 9614-3 (2002), Acoustics – Determination of sound power levels of noise sources using sound intensity – Part 3: Precision method for measurement by scanning.

ISO 16902-1 (2002), Hydraulic fluid power – Test code for the determination of sound power levels of pumps using sound intensity techniques: Engineering method – Part 1: Pumps.

Kuang J., Lin A. (2002), Theoretical aspects of torque responses in spur gearing due to mesh stiffness variation, Mechanical Systems and Signal Processing, 17, 2, 255–271.

Liping C., Yan Z., Fanli Z., Jianjun Z., Xianzhao T. (2011), Modelling and simulation of gear pumps based on Modelica/MWorks, Proceedings of 8th Modelica Conference, Dresden.

Manring N.D., Kasaragadda S.B. (2003), The theoretical flow ripple of an external gear pump, Transactions of the ASME, 125, 396–404.

Margetts L. (2015), Survey of computing platforms for engineering simulation, NAFEMS Benchmark Magazine, 1st issue, 10–14.

Miccoli G., Nizzoli T., Bertolini C. (2012), BEM & FEM-IFEM modeling and analysis methods for high complexity vehicle models, Proceedings of the International Conference on Noise and Vibration Engineering (ISMA), pp. 4145–4158, Leuven.

Mucchi E., Dalpiaz G., Rincolin F. (2010a), Elasto-dynamic analysis of a gear pump. Part I: pressure distribution and gear eccentricity, Mech Syst Signal Process, 24, 2160–2179.

Mucchi E., Dalpiaz G., Rivola A. (2010b), Elasto-dynamic analysis of a gear pump. Part II: meshing phenomena and simulation results, Mech Syst Signal Process, 24, 2180–2197.

Mucchi E., Dalpiaz G., Rivola A. (2011), Dynamic behaviour of gear pumps: effect of variations in operational and design parameters, Meccanica, 46(6), 1191–1212.

Mucchi E., Rivola A., Dalpiaz G. (2014), Modelling dynamic behaviour and noise generation in gear pumps: procedure and validation, Applied Acoustics, 77, 99–111.

Opperwall T., Vacca A. (2014), A combined FEM/BEM model and experimental investigation into the effects of fluid-borne noise sources on the air-borne noise generated by hydraulic pumps and motors, Journal Mechanical Engineering Science, 228(3), 457–471.

Parise G., Miccoli G., Carletti E. (2015), External gear pump noise field prediction by harmonic response and vibroacoustic analyses, Proceedings of the 22st International Congress on Sound and Vibration ICSV22, pp. 1–8, Florence.

Pedrielli F., Carletti E. (2005), Investigation on standardised sound intensity methods for the determination of the sound power level of hydraulic pumps, Proceedings of Forum Acusticum, pp. 2585–2590, Budapest.

Pedrielli F., Carletti E. (2014), Acoustical evaluation of power skiving gears for hydraulic pumps, Proceedings of the 21st International Congress on Sound and Vibration ICSV21, pp. 1–8, Beijing.

Ragunathan C., Manoharan C. (2012), Dynamic analysis of hydrodynamic gear pump performance using design experiments and operational parameters, IOSR Journal of Mechanical and Civil Engineering, 1, 6, 17–23.

Raju M.P., Khaitan S.K. (2012), High performance computing of three-dimensional finite element codes on a 64-bit machine, Journal of Applied Fluid Mechanics, 5, 2, 123–132.

Rodionov L., Pomatilov F., Rekadze P. (2015), Exploration of acoustic characteristics of gear pumps with polymeric pinion shafts, Procedia Engineering, 106, 36–45.

Sandberg G., Ohayon R. (2009), Computational aspects of structural acoustics and vibration, Springer, New York.

Skaistis S. (1988), Noise control of hydraulic machinery, Marcel Dekker Inc., New York.

Stryczek J., Antoniak P., Jakhno O., Kostyuk D., Kryuchkov A., Belov G., Rodionov L. (2015) Visualisation research of the flow processes in the outlet chamber-outlet bridge-inlet chamber zone of the gear pumps, Archives of Civil and Mechanical Engineering, 15, 1, 95–108.

Stupa V.I., Chernyshov Yu.A. (1990), Dependence of gear-pump operation on viscosity of the metered liquid, Chemistry and Technology of Man-Made Fibres, 21, 6, 453–455.

Sung-Hoon K., Hye-Min S., Jae-Cheon L. (2013), The effect of eccentricity between gear and housing in involute gear pump, Journal of the Korean Society of Marine Engineering, 6, 631–637.

Vansant K., B´eriot H., Bertolini C., Miccoli G. (2014), An update and comparative study of acoustic modeling and solver technologies in view of pass-by noise simulation, SAE Int. Journal Engines, 7, 3, 1–17.

Wojnarowski J., Onishchenko V. (2003), Tooth wear effects on spur gear dynamics, Mechanism and Machine Theory, 38, 161–178.




DOI: 10.1515/aoa-2016-0028

Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN)