Optimal design of the cross-angle for pulsation reduction in variable displacement pumps
2002 (English)In: Power Transmission and Motion Control: PTMC 2002 / [ed] Burrows, C. R. and Edge, K. A, Wiley-Blackwell, 2002, 319-333 p.Conference paper (Refereed)
The cross-angle, illustrated in this paper, is a fixed displacement angle around the axis perpendicular to the normal trunnion axis. With the cross-angle, the traditional piston dead centres will change as the normal displacement angle is varied. The result is a behaviour similar to thal of the revolving valve plate technique. but without any movable parts. When the cross-angle is used in a constant pressure system with a variable pump, the desired dead centre for optimal pro-compression coincides with the obtained dead centre for a wide range of displacement angles. This implies that when the cross-angle is used, the flow ripple becomes less sensitive to changes in displacement angles. The cross-angle does not constitute an alternative to the different design features developed, but rather as complement for preserved effective flow ripple reduction over a wide range of displacement angles.
ln this study. simulation-based optimisations, employing non-gradient optimisation techniques such as genetic algorithms and the Complex method, are used in order to find the optimal cross-angle for a variable displacement pump. Furthermore. with the help of optimisation, the trade-offs between attributes such as low flow ripples, avoidance of large cylinder pressure-peaks, and cavitation have been studied. Increased insight is thereby gained into what possibilities the cross-angle offers regarding reduction of pump ripple for a variable displacement pump.
Place, publisher, year, edition, pages
Wiley-Blackwell, 2002. 319-333 p.
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-36697Local ID: 32178ISBN: 1860583792ISBN: 978-1860583797OAI: oai:DiVA.org:liu-36697DiVA: diva2:257546
Bath Workshop on Power Transmission and Motion Control (PTMC 2002), September 2002, Bath, UK