平衡形ベーンポンプの圧力脈動に関する研究

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タイトル別名
  • Pressure Ripples of a Balanced Vane Pump.
  • ヘイコウガタ ベーン ポンプ ノ アツリョク ミャクドウ ニ カンスル ケンキ

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説明

This paper describes an experimental and theoretical investigation of the delivery pressure ripples of a balanced vane pump which is commonly used for automobile power steering (PS) hydraulic systems. A linearized model which includes torsional vibration of the pump drive shaft is proposed. The backflow into the pumping chamber resulting from fluid compressibility is not taken into consideration in the mathematical model because the delivery pressure of PS hydraulic systems is relatively low. It is found that the delivery pressure ripple levels of the test pump become lower with decreasing speed and increasing delivery pressure. The theoretical calculation shows that it derives from the fact that the phase of the pressure ripple waveform caused by the leakage flow variation lags behind that caused by the theoretical flow variation by about 180 degrees. Torsional vibration of the drive shaft has influence on the pressure ripple levels.

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