Geometry of Ball Seat Valves

Authors

  • Felix Fischer RWTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany https://orcid.org/0000-0003-2081-1823
  • Niklas Bauer RWTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany
  • Hubertus Murrenhoff RWTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany
  • Katharina Schmitz WTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany

DOI:

https://doi.org/10.13052/ijfp1439-9776.2222

Keywords:

Ball seat valve, contact, FEM, leakage, sealing

Abstract

The macroscopic geometry of ball seat valves is important for the quality of the seal. This works discusses the influence of different geometric properties on the contact area, the contact pressure and their relation to the leakage. The leakage is calculated using the results of finite element method (FEM) calculations and Persson’s percolation based method. The following properties of the seat are examined: the angle, the curvature and the eccentricity.

Downloads

Download data is not yet available.

Author Biographies

Felix Fischer, RWTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany

Felix Fischer received the master’s degree in Physics from RWTH Aachen University in 2019, specializing on solid state physics. He is working as a scientific associate at the Institute for Fluid Power Drives and Systems (ifas). His research is focused on the simulation of metallic seals.

Niklas Bauer, RWTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany

Niklas Bauer studied mechanical engineering at RWTH Aachen University. Before graduating with a master’s degree in 2019, he was a student research assistant at the Chair and Institute of General Mechanics and the Chair for Computational Analysis of Technical Systems. He is a member of the scientific staff at ifas. His research interest is the numerical simulation of sealing friction.

Hubertus Murrenhoff, RWTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany

Hubertus Murrenhoff is the former director of the Institute for Fluid Power Drives and Systems (ifas), formerly named 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.

Katharina Schmitz, WTH-Aachen University, Institute for Fluid Power Drives and Systems (IFAS), Aachen, Germany

Katharina Schmitz graduated in mechanical engineering at RWTH Aachen University in 2010 with part of her studies at Carnegie Mellon University in Pittsburgh (USA) and working in Le Havre (France). In 2015, Prof. Schmitz graduated as Dr.-Ing. Since March 2018 she is full professor at RWTH Aachen University and Director of the institute for Fluid Power Drives and Systems.

References

F. Fischer, N. Bauer, H. Murrenhoff, and K. Schmitz, “Finite element analysis of the hard-hard contact in seal valves,” in 2020 IEEE Global Fluid Power Society PhD Symposium, 2020.

V. L. Popov, Kontaktmechanik und Reibung: Ein Lehr-und Anwendungsbuch von der Nanotribologie bis zur numerischen Simulation. Springer-Verlag, 2009.

B. B. Mandelbrot and J. R. Wallis, “Noah, joseph, and operational hydrology,” Water resources research, vol. 4, no. 5, pp. 909–918, 1968.

B. B. Mandelbrot, D. E. Passoja, and A. J. Paullay, “Fractal character of fracture surfaces of metals,” Nature, vol. 308, no. 5961, pp. 721–722, 1984.

J. Moreira, J. K. L. da Silva, and S. O. Kamphorst, “On the fractal dimension of self-affine profiles,” Journal of Physics A: Mathematical and General, vol. 27, no. 24, p. 8079, 1994.

A. Balankin, D. Morales, O. Susarrey, I. Campos, F. Sandoval, A. Bravo, A. García, M. Galicia, et al., “Fractal properties of fracture surfaces in steel 1045,” International Journal of Fracture, vol. 106, no. 2, pp. 21–26, 2000.

B. Persson and C. Yang, “Theory of the leak-rate of seals,” Journal of Physics: Condensed Matter, vol. 20, no. 31, p. 315011, 2008.

B. Persson, “On the fractal dimension of rough surfaces,” Tribology Letters, vol. 54, no. 1, pp. 99–106, 2014.

B. Lorenz and B. Persson, “Leak rate of seals: Effective-medium theory and comparison with experiment,” The European Physical Journal E, vol. 31, no. 2, pp. 159–167, 2010.

H. Murrenhoff, Fundamentals of Fluid Power: Hydraulics. Shaker Verlag Gmbh, 2014.

B. N. Persson, “Fluid dynamics at the interface between contacting elastic solids with randomly rough surfaces,” Journal of Physics: Condensed Matter, vol. 22, no. 26, p. 265004, 2010.

M. Schmidt, Dichtheit als Entwicklungsschwerpunkt für Sitzventile hochdynamisch schaltender Zylinderantriebe. PhD thesis, RWTH Aachen, 2009.

T. Mielke, K. Schmitz, X. Ayala Galindo, and M. Rückert, “Experimental investigation of the hard-hard contact in seat valves,” in The Sixteenth Scandinavian International Conference on Fluid Power, 2019.

B. Persson, “Leakage of metallic seals: role of plastic deformations,” Tribology Letters, vol. 63, no. 3, p. 42, 2016.

B. N. Persson, “Theory of rubber friction and contact mechanics,” The Journal of Chemical Physics, vol. 115, no. 8, pp. 3840–3861, 2001.

V. L. Popov and M. Heß, Method of dimensionality reduction in contact mechanics and friction. Springer, 2015.

F. Fischer, K. Schmitz, A. Tiwari, and B. Persson, “Fluid leakage in metallic seals,” Tribology Letters, vol. 68, no. 4, pp. 1–11, 2020.

B. N. J. Persson, “Relation between interfacial separation and load: A general theory of contact mechanics,” Phys. Rev. Lett., vol. 99, p. 125502, Sep 2007.

F. Fischer, C. Peng, H. Murrenhoff, and K. Schmitz, “Research on leakage characteristics of metallic seals based on soft/hard contact theories.” 2020.

Downloads

Published

2021-05-31

Issue

Section

GFPS 2020