Modeling Noise Sources and Propagation in External Gear Pumps

In many cases, the limiting factor in the implementation of hydraulic systems is the amount of noise and vibration introduced into the environment by the displacement machines, as opposed to the noise from valves, loads, and other hydraulic sources. [...]investigation into the sources of noise is fo...

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Bibliographic Details
Published in:Energies (Basel) 2017-07, Vol.10 (7), p.1068
Main Authors: Woo, Sangbeom, Opperwall, Timothy, Vacca, Andrea, Rigosi, Manuel
Format: Article
Language:English
Subjects:
Acoustic noise
Acoustics
air-borne noise
Design optimization
external gear pumps
Fluid power
fluid-borne noise
Gear pumps
Hydraulic equipment
Hydraulics
Integrated approach
Journal bearings
Kinematics
Model accuracy
Noise control
Noise propagation
Noise reduction
Pressure
Pumps
Ripples
structure-borne noise
Theory
Vibration
vibro-acoustic modeling
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Summary:In many cases, the limiting factor in the implementation of hydraulic systems is the amount of noise and vibration introduced into the environment by the displacement machines, as opposed to the noise from valves, loads, and other hydraulic sources. [...]investigation into the sources of noise is focused on the displacement machines and discovering strategies to reduce noise is a key part of applying fluid power systems to a wider area of applications. Despite these efforts, the interaction between pressure ripples and ABN has yet to be clearly investigated [23]. [...]from the perspective of a quiet pump design, a comprehensive modeling approach is needed in order to investigate the relationship between all the internal sources of FBN including outlet pressure ripples and the SBN and resultant ABN. The results showed that there is a very weak correlation between FBN-SBN and FBN-ABN especially at high-frequency regions while the correlation of SBN-ABN is strong through a wide range of frequencies. [...]both numerical and experimental results imply that the outlet pressure ripple alone can hardly contribute to the high-frequency components of the radiated noise. 2.3. [...]the current model can predict the “total” sound energy radiated by the pump per unit time (overall SWL) with a fairly good accuracy. [...]the current acoustic model shows the potentials to investigate the dominant noise sources in a deeper level and serve for future studies aimed at designing quieter pumps. 4.
ISSN:1996-1073
1996-1073
DOI:10.3390/en10071068