Stress Analysis of the Cylinder Block in an Axial Piston Pump

Authors

  • Ivan Baus Danfoss Power Solutions, Krokamp 35, 24539 Neumünster, Germany
  • Robert Rahmfeld Danfoss Power Solutions, Krokamp 35, 24539 Neumünster, Germany
  • Andreas Schumacher Danfoss Power Solutions, Krokamp 35, 24539 Neumünster, Germany
  • Henrik C. Pedersen Aalborg University, Department of Energy Technology, Pontoppidanstraede 111, 9220 Aalborg, Denmark https://orcid.org/0000-0002-1034-3280

DOI:

https://doi.org/10.13052/ijfp1439-9776.2332

Keywords:

axial piston pump, fatigue, reliability, load life, cylinder block, stress determination

Abstract

For axial piston units, product optimisation plays an essential role in the development phase, where an efficient and price-attractive product design and manufacturing process is the key to the success of a product. Moreover, the market needs are on lighter, more compact, efficient, and reliable products designed to the limit. Therefore, reliability is the focus of this work, where the research includes method analysis of the material stress calculation applied to the cylinder block implemented in an axial piston pump. A simplified calculation model is presented and evaluated concerning load while remaining accessible for users without deep technical knowledge or access to expensive Finite Element (FE) simulation tools. The analytical calculation method delivers a stress distribution intended for different purposes like design evaluation or as load spectrum for lifetime calculation. Additionally, the developed calculation method is generalised, enabling the methodology to be used on any standard axial piston pump. The methodology utilises the stress determination model, which includes the load as a sum of forces caused by the external and internal influencing factors. To show the method’s success, a comparison demonstrates strong positive agreement between the calculated and simulated stress results obtained by Finite Element Analysis.

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Author Biographies

Ivan Baus, Danfoss Power Solutions, Krokamp 35, 24539 Neumünster, Germany

Ivan Baus is a PhD fellow at the Aalborg University, and his research field is the lifetime prediction of axial piston units. Ivan has been with Danfoss for over 10 years, operates in various development & research projects, and has several scientific publications. In the Research and Development team, his focus is on axial piston units for mobile applications covering the expertise and responsibilities of Condition Monitoring and Embedded Controller Solutions.

Robert Rahmfeld, Danfoss Power Solutions, Krokamp 35, 24539 Neumünster, Germany

Robert Rahmfeld is the Senior Director Engineering for Hydrostatics at Danfoss Power Solutions, being technically responsible for all hydrostatic axial piston units, including swash plate and bent-axis principle. He is with Danfoss over 15 years in various engineering positions, holds several patents, and is author or co-author of more than 50 scientific journal and conference papers. Before joining Danfoss, Dr. Rahmfeld completed his PhD on new displacement controlled hydraulic linear actuators at the Technical University of Hamburg in 2002 under supervision of Professor Monika Ivantysynova, and his MSc in mechanical engineering at Duisburg University in 1996. He was also holding a postdoc position for 2 years at Technical University of Hamburg and Purdue University, Indiana, USA, before joining Danfoss Power Solutions.

Andreas Schumacher, Danfoss Power Solutions, Krokamp 35, 24539 Neumünster, Germany

Andreas Schumacher is the Senior Director Centers of Excellence for Danfoss Power Solutions, delivering special Engineering Services like Electronics developments, Simulation, Functional Safety, Compliance, Sustainability, etc. for the complete DPS segment. He has been with Danfoss for close to 15 years in various engineering positions, holds several patents, and is an author or co-author of several scientific publications. Prior to Danfoss, Dr. Schumacher completed his PhD and his MSc in Mechanical Engineering at the Technical University of Braunschweig under Professor. H.-H. Harms.

Henrik C. Pedersen, Aalborg University, Department of Energy Technology, Pontoppidanstraede 111, 9220 Aalborg, Denmark

Henrik C. Pedersen is a Professor at the Department of Energy, Aalborg University, with speciality in Fluid Power and Mechatronic Systems. His research areas include modelling, analysis, design, optimization and control of mechatronic systems and fluid power systems in particular. He is the Head of the Section for Mechatronic Systems and program leader for several research projects within these areas.

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Published

2022-03-21

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Original Article