Prediction of Swash Plate Moment Using the Simulation Tool CASPAR

Abstract

The paper presents a new method of prediction of the swash plate moment based on a complex simulation model of the rotating group of swash plate axial piston machines. Due to further important demands within the design of the next generation of displacement machines – the reduction of noise and an increase of efficiency – the optimization of pump and motor control becomes really difficult. The application of the computer aided design tool CASPAR, a simulation tool developed at the Technical University of Hamburg-Harburg for the design and optimization of swash plate axial piston machines, allows the calculation of swash plate moments dependent on time, design and operating parameters of the machine. Especially the valve plate design affects the generated swash plate moment. The paper presents results of a simulation study into the influence of swash plate moments on the valve plate design. The dependency on the instantaneous pressure behaviour in the displacement chamber is explained. The simulation results were compared with experimental results obtained by measurements of the instantaneous pressure behaviour in the displacement chamber for various valve plate designs.