转套式配流系统U型减振槽结构设计优化
Structural Optimization Design of U-shaped Damping Groove in Rotating-sleeve Distributing-flow System

转套式配流系统中减振槽结构参数对系统的流量脉动、压力冲击、工作噪声、工作寿命等具有重要影响。以转套式配流系统U型减振槽的厚度、高度和包角为设计变量，考虑流量倒灌约束，建立了以压力极值最小为目标的设计优化模型。以iSIGHT优化设计框架搭建了系统设计优化平台，完成了设计变量对优化目标的灵敏度分析和结构优化。优化后泵的容积效率基本不变，泵腔压力极值减小了8.3%，显著降低了压力超调现象引起的冲击、振荡等问题，提高了整个配流系统工作的稳定性。优化结果具有较强的稳健性，但额定工作转速设定值较大时还需要重新优化U型减振槽结构。
The structure of damping groove of rotating-sleeve distributing-flow system has important influence on flow pulsation, pressure pulsation, working noise and operation life. Considering the constraint of flow backward, a structural optimization model of U-shaped damping groove was set up to get the minimized extreme pressure based on the design variables of its thickness, height and angle. It has completed that the structural optimization with sensitivity analysis of design variables to optimization goal using iSIGHT optimal design framework. After optimization, the volumetric efficiency of the pump is basically unchanged, and the extreme pressure of pump chamber is reduced by 8.3%, which significantly reduces the impact and oscillation caused by the pressure overshoot. The optimization design also improves the stability of whole distribution system. The optimization result has strong stability, but the U-shaped damping groove needs to be re-optimized when the rated working speed is higher