PSI - Issue 35

Gaston Haidak et al. / Procedia Structural Integrity 35 (2022) 124–131 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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4. Conclusions Although the interface between slipper and swashplate in axial piston machines is lubricated, it faces damage and failure problems. The lack of lubrication interfaces causes these problems during their normal working condition. In addition, the rise of temperature between the solid-fluid interface due to friction forces causes an excessive flow; once there is flow, the chance of having solid-solid contact is higher, which leads to the exaggerated deformation and failure of the solid parts. Thus, the balance between external and fluid pressure force is more than necessary to continuously obtain the optimum fluid film thickness for minimum energy loss. The results show that even as the interface between the slipper and the swashplate contains lubricant, the load applied to the slipper, especially when the rotational speed is not too high, can be huge to be borne by the slippers. These loads come from the pistons/cylinder block assembly and the reaction of the swashplate. It is also this that explains the rapid deformation and destruction of the slipper compared to the swashplate. Acknowledgements The authors gratefully acknowledge financial support by the Key Research and Development Program of Zhejiang Province (Grant No. 2019C01134) and the Key Research and Development Program of Zhejiang Province (Grant No. 2020C01153). References Bergada, J.M., Kumar, S., Davies, D.Ll., Watton, J., 2012. A complete analysis of axial piston pump leakage and output flow ripples. Applied Mathematical Modelling 36, 1731 – 1751. https://doi.org/10.1016/j.apm.2011.09.016 Bergada, J.M., Watton, J., Haynes, J.M., Davies, D.L., 2010a. The hydrostatic/hydrodynamic behaviour of an axial piston pump slipper with multiple lands. Meccanica 45, 585 – 602. https://doi.org/10.1007/s11012-009-9277-0 Bergada, J.M., Watton, J., Haynes, J.M., Davies, D.L., 2010b. The hydrostatic/hydrodynamic behaviour of an axial piston pump slipper with multiple lands. Meccanica 45, 585 – 602. https://doi.org/10.1007/s11012-009-9277-0 Bhattacharya, A., Bagdi, A., Das, D., 2016. Influence of microstructure on high-stress abrasive wear behaviour of a microalloyed steel. Perspectives in Science 8, 614 – 617. https://doi.org/10.1016/j.pisc.2016.06.036 Flegler, F., Neuhäuser, S., Groche, P., 2020. Influence of sheet metal texture on the adhesive wear and friction behaviour of EN AW-5083 aluminum under dry and starved lubrication. Tribology International 141, 105956. https://doi.org/10.1016/j.triboint.2019.105956 Haidak, G., Wang, D., E, S., Li, F., 2019a. The Impact of the Deformation Phenomenon on the Process of Lubricating and Improving the Efficiency Between the Slipper and Swashplate in Axial Piston Machines. IEEE Access 7, 69393 – 69409. https://doi.org/10.1109/ACCESS.2019.2919493 Haidak, G., Wang, D., Ekemeyong Awong, E.L., 2020. Modelling of deformation and failure of slipper-retainer assembly in axial piston machine. Engineering Failure Analysis 111, 104490. https://doi.org/10.1016/j.engfailanal.2020.104490 Haidak, G., Wang, D., Shiju, E., 2019b. Research on the thermo-elastic deformation and fracture mechanism of the slipper retainer in the axial piston pumps and motors. Engineering Failure Analysis. https://doi.org/10.1016/j.engfailanal.2019.02.041 Haidak, G., Wang, D., Shiju, E., Liu, J., 2018. Study of the influence of slipper parameters on the power efficiency of axial piston pumps. Advances in Mechanical Engineering 10, 168781401880146. https://doi.org/10.1177/1687814018801460 Hashemi, S., Kroker, A., Bobach, L., Bartel, D., 2016. Multibody dynamics of pivot slipper pad thrust bearing in axial piston machines incorporating thermal elastohydrodynamics and mixed lubrication model. Tribology International 96, 57 – 76. https://doi.org/10.1016/j.triboint.2015.12.009 Kumar, S., Bergada, J.M., Watton, J., 2009. Axial piston pump grooved slipper analysis by CFD simulation of three-dimensional NVS equation in cylindrical coordinates. Computers & Fluids 38, 648 – 663. https://doi.org/10.1016/j.compfluid.2008.06.007 Lin, Q., Wei, Z., Wang, N., Chen, W., 2013. Analysis on the lubrication performances of journal bearing system using computational fluid dynamics and fluid – structure interaction considering thermal influence and cavitation. Tribology International 64, 8 – 15. https://doi.org/10.1016/j.triboint.2013.03.001 Ma, J., Chen, J., Li, J., Li, Q., Ren, C., 2015. Wear analysis of swash plate/slipper pair of axis piston hydraulic pump. Tribology International 90, 467 – 472. https://doi.org/10.1016/j.triboint.2015.05.010 Schenk, A., 2014. Predicting lubrication performance between the slipper and swashplate in axial piston hydraulic machines. Theses and Dissertations Available from ProQuest 1 – 179. Schenk, A., Ivantysynova, M., 2015. A Transient Thermoelastohydrodynamic Lubrication Model for the Slipper/Swashplate in Axial Piston Machines. J. Tribol 137, 031701. https://doi.org/10.1115/1.4029674