Eemil Zæv
Faculty of mechanical engineering, Ss. Cyril and Methodius University, Skopje, Macedonia
Gerhard Rath
Institute for automation, University of Leoben, Leoben, Austria
Hubert Kargl
Sandvik Mining and Construction, Austria
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http://dx.doi.org/10.3384/ecp1392a35Published in: 13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden
Linköping Electronic Conference Proceedings 92:35, p. 355-364
Mining machines are subjected to severe vibrations during their operation. If we succeed to damp some of those vibrations then we have succeed to reduce the dynamic load of the machine and to improve operator comfort and productivity. The main idea for the research done in this paper is to investigate possible improvements in active vibration damping in hydraulic power systems of a mobile machine (mining machine) influencing hydraulic system layout and control strategy. Modelling of a standard and individual metering (separate meter-in separate meter-out SMISMO) load sensing (LS) hydraulic power system of a machine has been done. Model of the individual metering system has been validated with measurements. Those models have been used to study new concepts of active vibration damping. SMISMO system has been used to develop new energy efficient concept for active vibration damping using the third (crossport) valve between meter-in and meter-out lines of the hydraulic cylinder as a damping element. Using simulations has been shown that this new system can improve damping effect; drastically decreasing usage of the energy from the pump.
Fluid power systems; active vibration damping; dynamic pressure feedback; energy efficiency
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