Abstract
This paper deals with noise reduction of a balanced vane pump which is used in power steering system based on a simulation technique.To ensure passenger car riding comfort, it is important to reduce the noise and vibration levels of the hydraulic pumps used in them. From the viewpoint of car energy consumption, a weight reduction of automobile parts and components is becoming an important issue. The weight reduction, however, leads to an insufficiency in stiffness of the parts and components and may cause a lessening of the dynamic characteristics of those parts and components.To develop a quiet hydraulic pump as an automobile part, the internal pressure fluctuation must be reduced. To solve this problem, simulation techniques are usually needed. Conventional simulation techniques, however, do not take into account the effect of the stiffness of the parts and components, and accordingly, the simulation results are not accurate enough.In this study, the effect of the cam deformation on the internal pressure of a vane pump has been investigated both theoretically and experimentally.The advanced simulation technique to predict internal pressure was developed, taking in consideration cam deformation, and noise reduction of 2-4dB could be achieved through the design application of this technique.
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