This paper presents a simulation model for the analysis of internal gear ring pumps. The model follows a multi domain simulation approach comprising sub-models for parametric geometry generation, fluid dynamic simulation, numerical calculation of characteristic geometry data and CAD/FEM integration. The sub-models are interacting in different domains and relevant design and simulation parameters are accessible in a central, easy to handle graphical user interface.
The potentials of the described tool are represented by simulation results for both steady state and transient pump operating conditions and by their correlation with measured data. Although the presented approach is suitable to all applications of gear ring pumps, a particular focus is given to hydraulic actuation systems used in automotive drivetrain applications. In particular, simulation results of entire drive cycles on the example of an electro-hydraulic actuated AWD coupling (considering electric control unit, electric motor, internal gear ring pump, pressure relief valve and multi-plate clutch) are presented in the final part of the paper.
The presented results aim to show the capability of the developed tool for design considerations: due to fully parameterized models, a comparison of different pump design concepts regarding to pump efficiency and system performance and can rapidly be performed already in an early stage of the development process.
