Positive displacement machines present a well-known major drawback that is the oscillation in delivered flow rate. This paper presents two active solutions for reducing the flow ripple generated by a pump with an external device actuated by means of a piezo-stack actuator. The work is focused on a theoretical analysis, with the aim of collecting information about the performance of the solutions proposed and their main advantages and drawbacks. The active methods proposed involve a cylindrical actuator connected to the delivery line of the pump. The piston could be actuated directly by a piezo-stack actuator or by a differential pressure modulated by a proportional piezo actuated valve. The actuators were modelled and a control algorithm based on Least Mean Square algorithm was used to achieve the adaptability for both systems at different operating con-ditions. The developed mathematical model permits to define the great potential of these solutions that can drastically reduce the flow ripple. The first architecture presented resulted as the best solu-tion, while the second one allowed reduction of the production cost.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Theoretical Analysis of Active Flow Ripple Control in Positive Displacement Pumps



    Erscheinungsdatum :

    01.01.2022



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629




    Methods of Reducing Flow Ripple from Fluid Power Pumps - a Theoretical Approach

    Palmberg, Jan-Ove S. / Weddfelt, Kenneth G. / Pettersson, Maria E. | SAE Technical Papers | 1991



    The overall efficiency of positive-displacement pumps

    Schlösser, W. M. J. | TIBKAT | 1969


    Simulation of Suction Flow Ripple in Power Steering Pumps

    Jones, B. L. / Longmore, D. K. / Johnston, D. N. | SAE Technical Papers | 1998