Repozytorium publikacji - Politechnika Gdańska

Axial piston pumps are the core elements of most medium and high-pressure hydraulic systems. High volumetric efficiency and high working pressures are the main advantages of this type of pumps. Therefore it is necessary to accurately calculate the leakage flow through the gaps to design efficient high-pressure pump. The main difficulty of such calculations is the fact, that the gaps change their geometry during pumping process. The change of gaps’ geometry can be caused by the motion of the pump’s elements or can be pressure-induced. Both of these factors are included in the article. The paper describes the leakage in: a gap between piston and cylinder block, gap in commutation window, gaps in hydrostatic bearings, the gap between commutation plate and cylinder block. The article includes the methodology and results of FEM and CFD simulation of flow through deformed and undeformed gaps. Basing on the CFD results the mathematical models of such gaps were prepared and added to the article.

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