Finite Element based Transient Elastohydrodynamic Simulation of Translational Hydraulic Seals

Authors

  • Julian Angerhausen Institute for Fluid Power Drives and Systems, RWTH Aachen University, Germany
  • Hubertus Murrenhoff Institute for Fluid Power Drives and Systems, RWTH Aachen University, Germany
  • Bo N. J. Persson Peter Grünberg Institut – 1, FZ Jülich, Jülich, Germany
  • Leonid Dorogin Peter Grünberg Institut – 1, FZ Jülich, Jülich, Germany
  • Michele Scaraggi Department of Engineering for Innovation, Universit´a del Salento, Italy

DOI:

https://doi.org/10.13052/ijfp1439-9776.2011

Keywords:

Hydraulic seal, sliding friction, lubricated contact, finite element, fluid structure interaction

Abstract

Seals are crucial machine elements in hydraulic devices. However, especially with regard to dynamic seals – for example in cylinder applications – the physical understanding of the sealing mechanism is still insufficient. In this paper a physically based, transient elastohydrodynamic simulation for translational hydraulic seals is presented. The deformation of the seal is calculated in a dynamic finite element (FE) simulation, hyper- and viscoelastic material properties are taken into account. For the numerical calculation of the fluid film and its influences on the seal deformation the FE simulation is coupled with an implementation of the transient Reynold’s equation. For a physically based calculation of the solid contact, the FE-model is coupled with Persson’s theory of rubber friction and contact mechanics. Both, normal force and solid friction are implemented. In a simulation study the influence of the relative velocity in the contact between the elastic, highly deformable seal and a hard cylinder is investigated. The initial phase of motion is investigated in detail. The simulation results are compared to experimental data of a lubricated sliding contact between an nitrile butadiene rubber (NBR) O-ring and a rough steel surface.

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Author Biographies

Julian Angerhausen, Institute for Fluid Power Drives and Systems, RWTH Aachen University, Germany

Julian Angerhausen Born in 1988 in Krefeld, Germany. Studied mechanical engineering and economics at RWTHAachen University. Since October 2014 he is member of the scientific staff at the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University. His research focuses on the transient behaviour of translational hydraulic seals.

Hubertus Murrenhoff, Institute for Fluid Power Drives and Systems, RWTH Aachen University, Germany

Hubertus Murrenhoff Born in 1953 he is the director of the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University, Germany. Main research interests cover hydraulics and pneumatics including components, systems, controls, simulation programs and the applications of fluid power in mobile and stationary equipment.

Bo N. J. Persson, Peter Grünberg Institut – 1, FZ Jülich, Jülich, Germany

Bo N. J. Persson Born in 1952 he is research scientist at FZ-Juelich and CEO at MultiscaleConsulting. Main interest at present is all aspects of tribology, e.g., friction, adhesion and contact mechanics.

Leonid Dorogin, Peter Grünberg Institut – 1, FZ Jülich, Jülich, Germany

Leonid Dorogin Born in St.-Petersburg, Russia in 1984, and graduated from University of Tartu in Estonia. Currently researcher at FZ Juelich, Germany. Main interests in adhesion, tribology, nanomechanics and theory of defects.

Michele Scaraggi, Department of Engineering for Innovation, Universit´a del Salento, Italy

Michele Scaraggi Born in 1982 he is assistant professor in applied mechanics at University of Salento, Italy. Main research interests cover contact mechanics and tribology, surface physics, bio-mimetics, multibody and computational mechanics, mechanical design.

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Published

2019-04-18

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Section

Original Article

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