在各種液壓泵中，軸向柱塞泵(Axial Piston Pump)由於容積效率高、功率密度大、使用壽命長等獨特優點得到廣泛應用。在提升軸向柱塞泵性能同時，如何有效降低柱塞泵噪音成為重要研究課題。
在軸向柱塞泵中，配流盤(Valve Plate)是關鍵零組件之一。它的結構形式、尺寸材料及加工精度合理與否，將直接影響柱塞泵的工作可靠性、容積效率和壽命。在柱塞泵運作過程產生之壓力衝擊(Pressure Impact)與流量脈動(Flow Fluctuation)是激發液壓系統噪音的主要原因。而配流盤結構的優化設計是降低泵系統噪音的主要途徑，也是本研究的主軸。
本研究以CFD模擬軸向柱塞泵內部流場行為，藉以了解柱塞泵運轉時的流場情形並加以探討，並模擬柱塞泵之不同工作情況，將助於對柱塞泵之運作機制有更進一步了解，最後將對配流盤緩衝槽(Buffer Groove)的尺寸進行優化設計，達到降低流量脈動與噪音的目的。

Axial piston pump with its high volume efficiency, high power density and long work life is widely used in engineering applications of hydraulic pump. It was important to develop its performance and to reduce the noise of axial piston pump during operation.
Valve plate was a key component of axial piston pump. Its structure, material and precision which are either reasonable or not will affect the reliability, volume efficiency and work life directly. The pressure impact and flow fluctuation were the main sources of noise in hydraulic system during the piston pump operating. Design of valve plate structure was a main manner to reduce noises of axial piston pump, It is also important in this research.
In this research, the flow field in axial piston pump was simulated using CFD to consider the flow characteristic during piston pump operating. In addition, the different working conditions of axial piston pump were also investigated. Based on results, we can know deeply the operation of axial piston pump mechanisms. Finally, the dimensions of buffer grooves of valve plate were designed to reduce the flow fluctuations and noises.

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