M. Erhard
Institut für Fluidtechnik, Technische Universität Dresden, Germany
J. Weber
Institut für Fluidtechnik, Technische Universität Dresden, Germany
Georg Schoppel
Bosch Rexroth AG, Germany
Download article
http://dx.doi.org/10.3384/ecp1392a36Published in: 13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden
Linköping Electronic Conference Proceedings 92:36, p. 365-376
Published: 2013-09-09
ISBN: 978-91-7519-572-8
ISSN: 1650-3686 (print), 1650-3740 (online)
This paper demonstrates a novel numerical procedure for a synthesis of electro-hydraulic pressure relief valve performance starting with the performance requirements from a functional specification. Results of this methodological approach are the unknown demands for the solenoid with regard to control orifice concepts and the solenoid geometry itself fulfilling the requirements.
The developed modeling approach comprises two major solution steps. At the beginning the displacement-dependent solenoid-spring force characteristic is calculated from the intended pressure-flow rate characteristic map without the use of optimization tools. This new algorithm performs an inverse simulation of a single stage pressure valve. The next solution step deals with the determination of the geometrical shape of the solenoid. Here steady state FEM computations are used in combination with response surface methodologies to predict the desired geometrical shape. At the end robustness verification is done by means of Monte-Carlo simulation for the uncertainties of the valve assembly.
Starting point for the inverse calculations are different control orifice concepts causing varying demands on the solenoid. As a result of this benchmark the most favorable control orifice concept is used for determination of the solenoid geometry. This is performed within several iterations also considering the spring force. Afterwards the robustness of the valve assembly is examined. The verification of the modeling attempt is done on the basis of prototype parts for the solenoid and the control orifice. Measurements confirm the accuracy of the novel simulation strategy for a standalone virtual product development
[1] G Licskó; A Champneys; and C Hos. Nonlinear Analysis of a Single Stage Pressure Relief Valve. International Journal of Applied Mathematics; 39(4); 2009.
[2] C Bazsó; and C Hos. An experimental; numerical and theoretical study on valve chatter. Proc. of the Fluid Power and Motion Control; Bath; 2010
[3] D Cristofori; and A Vacca. The Modeling of Electrohydraulic Proportional Valves. Journal of Dynamic Systems; Measurement and Control; 134; 2012
[4] T D Spegar et al. An Analytical and Experimental Study of a High Pressure Single Piston Pump for Gasoline Direct Injection (GDi) Engine Applications. SAE Technical Paper; 2009-01-1504; 2009
[5] J Faulkner; N Johnston; and S Weber. Computer Modeling of a Pressure Relief Cartridge Valve. Proc. of the 52nd National Conference on Fluid Power; Las Vegas; 2011
[6] D Wehner. Modellbasierter Systementwurf am Beispiel vorgesteuerter Druckbegrenzungsventile. Dissertation; Technische Universität Dresden; 2008
[7] M Erhard; D Wehner; and J Weber. Numerische Strömungsberechnung (CFD) im Ventilentwurf. Fluid- Struktur-Interaktion (FSI) und deren Anwendungspotenzial. Ölhydraulik und Pneumatik; 11-12; 2011
[8] M Petzold et al. Analysis of the flow conditions in a dosing pump with regards to new fuels. Proc. of the 8th International Fluid Power Conference; Dresden; 2012
[9] P Casoli; and A Vacca. Design Optimization of a special relief valve with Response Surface Methodology. Proc. of the Power Transmission and Motion Control; Bath; 2007
[10] M Erhard; G Schoppel; and J Weber. Simulation-Based Design of a Direct-Operated Proportional Pressure Relief Valve. Proc. of the 8th International Fluid Power Conference; Dresden; 2012
[11] S Han. Varianzbasierte Sensitivitätsanalyse als Beitrag zur Bewertung der Zuverlässigkeit adaptronischer Systeme. Dissertation; Technische Universität Darmstadt; 2011
