基于空化特性的高速轴向柱塞泵配流盘优化设计

Optimization Design of Valve Plate for High Speed Axial Piston Pump Based on Cavitation Characteristics

以某型号高速轴向柱塞泵为研究对象,搭建其带空化模块的CFD数值仿真模型,并以此为基础,对柱塞泵在旋转过程中的空化情况进行分析。结果表明:空化主要发生在柱塞腔内,充液率不足及射流角过大是发生空化的主要原因。针对空化的产生机制,利用仿真数据与理论数据相结合的方法,对配流盘开口角度进行优化。根据流场情况,提出一种两端具有一定斜度的配流盘结构,并对该结构进行优化。在配流盘开口角度和结构优化后,柱塞腔内的整体空化程度下降了74.2%,对空化具有明显的抑制效果。

Taking a high-speed axial piston pump as the research object,a CFD numerical simulation model with cavitation module was built.Based on the simulation model,the cavitation of the piston pump during the rotation process was analyzed.The results show that the cavitation mainly occurs in the piston cavity,and the main reasons for the cavitation are insufficient liquid filling rate and too large jet angle.Aiming at the cavitation mechanism,the opening angle of the valve plate was optimized by combining simulation data with theoretical data.According to the flow field,a valve plate structure with a certain slope at both ends was proposed and optimized.After the optimization of valve plate opening angle and structure,the overall cavitation degree in the piston is reduced by 74.2%,which has obvious inhibition effect on cavitation.