Interaction Between Swash Plate Movement And Commutation In Axial Piston Machines

Abstract

In a variable displacement pump the swash plate has the ability to oscillate because of the excitation of the piston pressure forces. The odd number of pistons and the alternating piston pressure produce a periodically changing torque load. The resulting swash plate movement alters the piston stroke and therefore interacts with the piston pressure gradient. In this study a simulation model of the dynamics of a variable displacement pump is developed and the interaction between the swash plate movement and the commutation is investigated. The torque load influence of different valve plate designs is analyzed and presented in this paper.