Erweiterung der Einsatzgrenzen von wasserhydraulischen Kolbenpumpen

  • Increasing the operating range of waterhydraulic piston pumps

Schoemacker, Florian; Schmitz, Katharina (Thesis advisor); Jacobs, Georg (Thesis advisor)

Düren : Shaker Verlag (2020, 2021)
Book, Dissertation / PhD Thesis

In: Reihe Fluidtechnik. A 104
Page(s)/Article-Nr.: 1 Online-Ressource (v, 133 Seiten) : Illustrationen, Diagramme

Dissertation, RWTH Aachen University, 2020


State of the art water hydraulic piston pumps are lubricated with the pressure fluid and therefore the pressure level is limited to 210 bar due to the high load of the tribological contacts. For high pressure water hydraulic applications, plunger pumps are commonly used, which require a much greater installation space. These two examples show that there is a potential for the development of efficient, compact water hydraulic piston pumps. A simulation model has been developed for the tribological contact of the piston slipper and the swash plate of an axial piston pump, which is based on the Reynold’s equation. The model is combined with an elastic deformation calculation of the sliding surfaces. Within the simulation tribological contacts of metallic and plastic materials can be investigated. Plastic materials are often used in water hydraulics. Furthermore, a radial piston machine with an innovative separation of pressure and lubrication fluid has been developed. This includes the choice of a suitable pump design and the separation itself. Therefore state of the art types of media separation are stated and a new principle is derived. The function is investigated using simulation models and from the results a prototype for experiments is designed. In order to experimentally validate the function of the media separation a test bench has been built at the ifas laboratory. The results are used for a redesign and the development of a fully functional prototype.