Full Content is available to subscribers

Subscribe/Learn More  >

Investigation of Steady-State Flow Forces in Spool Valves of Different Geometries and at Different Oil Temperatures With the Help of Measurements and CFD Simulations

[+] Author Affiliations
Patrik Bordovsky, Hubertus Murrenhoff

RWTH Aachen University, Aachen, Germany

Paper No. FPMC2016-1724, pp. V001T01A013; 10 pages
  • BATH/ASME 2016 Symposium on Fluid Power and Motion Control
  • BATH/ASME 2016 Symposium on Fluid Power and Motion Control
  • Bath, UK, September 7–9, 2016
  • Conference Sponsors: Fluid Power Systems and Technology Division
  • ISBN: 978-0-7918-5006-0
  • Copyright © 2016 by ASME


When designing an actuator for a spool type directional control valve, axial forces acting on the spool have to be estimated. The steady-state flow force is the dominant axial force, which usually acts in the closing direction of the valve. However, many factors such as the valve geometry and the oil properties influence the flow force characteristics. Investigations regarding their effects on steady-state flow forces are described within this paper.

Different spool geometries of a test 2/2-way spool valve are used for steady-state flow force measurements at different oil temperatures. The measurement data are used for validation of CFD simulations, which are carried out to scrutinise the flow inside the valve. Besides the steady-state flow forces, the fluid flow angles at the inlet and the outlet of the spool chamber are analysed.

The results show that the spool geometry has a significant influence both on the flow rate and the steady-state flow force characteristics. Especially, the shape of the control edge has an impact on the flow patterns and on the magnitudes of steady-state flow forces. Moreover, the inlet and outlet fluid flow angles do not correlate with the expected values, which are commonly used for an analytical estimation of the flow forces. Furthermore, the oil temperature leads to quantitative deviations of the steady-state flow forces.

Copyright © 2016 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In