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2024 | OriginalPaper | Chapter

Spool Valve Stability and Sealing Land Deformation

Authors : Rudolf Scheidl, Bernhard Manhartsgruber

Published in: Advances in Hydraulic and Pneumatic Drives and Control 2023

Publisher: Springer Nature Switzerland

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Abstract

The chapter delves into the critical issue of spool valve stability and sealing land deformation, particularly focusing on the destabilizing effects of pressure-induced elastic deformations. It begins by examining historical cases of valve problems due to unfavorable sealing gap pressure fields, such as those encountered in common rail diesel injectors. The authors then present a rigorous nondimensional analysis to understand the main effects and influences of major system parameters on spool valve stability. The study introduces a simplified axisymmetric model and a Finite Element model to analyze elastic deformations and their impact on lateral spool valve stability. Notably, the chapter discusses innovative design modifications, like chamfering the sealing land, to enhance the self-centering capability of the valve. The comprehensive analysis, including both theoretical and practical aspects, offers valuable insights for professionals aiming to optimize spool valve performance and stability.
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previous chapter New Combined Centrifuge for Cleaning the Working Fluids of Hydraulic Drives from Mechanical Contaminations
next chapter Modelling of the Hydrostatic Relief in the Cylinder Block of an Axial Piston Pump
Literature
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Mitter, R.: Rechnerische Untersuchung eines Verschleißproblems im Injektor eines Common Rail Dieseleinspritzsystems auf Basis eines elasto-hydrodynamischen Modells – Ventilkolbenführung und Dichtfunktion gegen Hochdruck. Diploma thesis, Johannes Kepler University Linz, Austria (2000)
2.
Winkler, B., Mikota, G., Scheidl, R., Manhartsgruber, B.: Modelling and simulation of the elastohydrodynamic behavior of sealing gaps. Aust. J. Mech. Eng. 2(1), 72–86 (2005)CrossRef
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Gradl, C., Scheidl, R.: A combined hydrostatic hydrodynamic bearing based on elastic deformation. In: Proceedings of the Proceedings of the 9th FPNI Ph. D. Symposium on Fluid Power: 26–28 October 2016, Florianópolis, SC, Brazil (2016)
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Schulz, M., Baumann, M., Bauer F., Haas, W.: Influence of different shaft surface finishes on the tribological and functional behaviour of radial shaft seals. In: Proceedings of 11th IFK, 19–21 March 2018 Aachen
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Matthias, S., Rudolf, S., Lukachev, E.: A new elastic non contacting sealing concept for valves. Int. J. Fluid Power 23(3), 433–452 (2022)
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Rituraj, R., Scheidl, R.: Stability analysis of spools with imperfect sealing gap geometries. Int. J. Fluid Power 21(3), 383–404 (2020)
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Drozdov, A.D., deClaville Christiansen, J.: Thermo-mechanical behavior of poly (ether ether ketone): experiments and modeling. Polymers (Basel) 13(11), 1779 (2021)
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US Patent #7537026, Filed: Apr 5, 2005, Date of Patent: May 26, 2009. Inventors: Dantlgraber, J., Försterling, H., Scheidl, R., Winkler, B.
11.
Scheidl, R., Resch, M., Scherrer, M., Zagar, P.: An approximate, closed form solution of sealing gap induced lateral forces for imperfect sealing land geometries. In: Advances in Hydraulic and Pneumatic Drives and Control 2020, pp. 102–111. Springer International Publishing. (2021). https://​doi.​org/​10.​1007/​978-3-030-59509-8_​9
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Gradl, C.: Hydraulic stepper drive: Conceptual study, design and experiments. PhD thesis, Johannes Kepler University Linz, 2017
Metadata
Title
Spool Valve Stability and Sealing Land Deformation
Authors
Rudolf Scheidl
Bernhard Manhartsgruber
Copyright Year
2024
Book
Advances in Hydraulic and Pneumatic Drives and Control 2023

Print ISBN: 978-3-031-43001-5

Electronic ISBN: 978-3-031-43002-2

Copyright Year: 2024

DOI
https://doi.org/10.1007/978-3-031-43002-2_2

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