Damping of Pressure Pulsations in Mobile Hydraulic Applications by the Use of Closed Cell Cellular Rubbers Integrated into a Vane Pump

The present study evaluates the potential of a bio-inspired pulsation damper in a vane pump used in mobile hydraulic applications. Pressure pulsations caused by such positive displacement pumps can lead to malfunctions and noise in a hydraulic system. A common measure to reduce pressure pulsations is the integration of pressure pulsation dampers downstream of the pump. This type of damping measure can also be found in biology as e.g. in the human blood circulatory system. Such working principles found in living organisms offer a high potential for a biomimetic transfer into technical applications. The newly developed bio-inspired damper consists of cellular rubbers with non-linear viscoelastic material properties. In order to evaluate the new damping method, pressure pulsations were measured at two different back pressures and at a wide engine speed range of the vane pump. For further assessment, different setups, varying the stiffness of the cellular rubber materials and the damper volume, were tested. Within the tested back pressures, the pressure pulsations could be reduced by up to 40%. The developed integrated pulsation damper offers a high potential to dampen pressure pulsations of positive displacement pumps used in mobile hydraulic applications operating below 10 bar.

[1]  Hans-Heinrich Harms.  Maßnahmen zur Geräuschminderung in Hydraulikanlagen von Ackerschleppern , 2013 .

[2]  Thomas Speck,et al.  Quantitative and qualitative changes in primary and secondary stem organization of Aristolochia macrophylla during ontogeny: functional growth analysis and experiments , 2008, Journal of experimental botany.

[3]  S. Glagov,et al.  Structural Basis for the Static Mechanical Properties of the Aortic Media , 1964, Circulation research.

[4]  Kenneth A. Cunefare,et al.  Material Modeling of High-Pressure Compliant Syntactic Foams , 2015 .

[5]  R. Shadwick,et al.  Mechanical design in arteries. , 1999, The Journal of experimental biology.

[6]  Michael F. Ashby,et al.  The mechanical properties of cellular solids , 1983 .

[7]  Kyungnam Kim,et al.  Development of optimal diaphragm-based pulsation damper structure for high-pressure GDI pump systems through design of experiments , 2013 .

[8]  Hua Zhou,et al.  Investigations on Pulsation-Reduction Characteristics of Hydraulic Attenuator Based on Experimental Method , 2014 .

[9]  V.Larry Bernart.  Pulsation dampening in suction and discharge systems for PD pumps , 1999 .

[10]  Alan Plumtree,et al.  Modelling compressive cyclic stress–strain behaviour of structural foam , 2001 .

[11]  T Masselter,et al.  A review of selected pumping systems in nature and engineering—potential biomimetic concepts for improving displacement pumps and pulsation damping , 2015, Bioinspiration & biomimetics.

[12]  Andreas F. Koegler,et al.  Experimental Characterization of a Flow‐through Pulsation Damper Regarding Pressure Pulsations and Vibrations , 2017 .

[13]  L. Mullins.  Effect of Stretching on the Properties of Rubber , 1948 .

[14]  Hiroshi Murata,et al.  Rheology - Theory and Application to Biomaterials , 2012 .

[15]  Uwe Heisel,et al.  Verfahren zur Messung der Druckpulsation von Verdrängerpumpen , 1989 .

[16]  Zongxia Jiao,et al.  A compact design of pulsation attenuator for hydraulic pumps , 2016, 2016 IEEE International Conference on Aircraft Utility Systems (AUS).

[17]  A. C. Burton,et al.  The reason for the shape of the distensibility curves of arteries. , 1957, Canadian journal of biochemistry and physiology.

[18]  Nicholas E. Earnhart,et al.  Model and analysis of a cylindrical in-line hydraulic suppressor with a solid compressible liner , 2014 .

[19]  S. Mizrahi,et al.  Mechanical behavior of closed cell plastic foams used as cushioning materials , 1989 .

[20]  S. Glagov,et al.  Transmural Organization of the Arterial Media: The Lamellar Unit Revisited , 1985, Arteriosclerosis.

[21]  P. Dobrin,et al.  Mechanical properties of arteries , 1978, Physiological reviews.

[22]  P B Dobrin.  Mechanical properties of arterises. , 1978 .