The design of quiet power steering vane pumps requires accurate experimental and analytical tools to assess fluidborne noise. Measurement of vane pump fluidborne noise-generating potential must minimize hydraulic circuit effects. The difficulties of distinguishing between pump and hydraulic circuit effects is discussed. A technique called the “secondary source” method for measuring positive displacement pump flow ripple is described. The technique allows evaluation of the pump discharge impedance and flow ripple based on the analysis of the wave propagation characteristics in a special test circuit. This test method is used to validate a computer model of the vane pump flow ripple at the rotating group discharge. The model computes the vane chamber pressure histories which are used to obtain net discharge flow ripple. Geometric definition is kept flexible in the model so that compression and leakage can be evaluated for any vane pump design. The flow ripple is predicted and compared with measurements for two pumps, showing good agreement.


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    Title :

    Measurement and Prediction of Power Steering Vane Pump Fluidborne Noise


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Noise & Vibration Conference & Exposition ; 1993



    Publication date :

    1993-05-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Measurement and prediction of power steering vane pump fluidborne noise

    Dickinson,A.L. / Edge,K.A. / Johnston,D.N. et al. | Automotive engineering | 1993


    Hydraulic Fluidborne Noise Mechanics

    Skaistis, Stanley J. | SAE Technical Papers | 1975