一种液压系统脉动消除器的设计与分析

面向航空液压系统消除压力脉动、提升系统可靠性和寿命的需求，设计了一种液压系统压力脉动消除器。基于流体网络理论建立了脉动消除器及实验系统的理论模型，并考虑安装方式和负载类型的不同，分析了脉动消除器在不同工况下的滤波效果。然后通过仿真方法验证了设计方案的可行性以及理论分析的准确性，仿真过程考虑了系统负载对脉动的影响。最后实验验证了脉动消除器的滤波效果。结果表明：设计的新型结构压力脉动消除器无运动部件、布局紧凑，与飞机液压系统中常用的液压柱塞泵使用匹配度高，是消除液压系统脉动的有效部件；在300~500 Hz的压力脉动频率范围内，研究设计的脉动消除器可以消除10 dB的压力脉动，能够满足飞机液压系统消除压力脉动的需求，在航空领域中具有广泛的应用前景。

Design and analysis of one type of pulse filter for hydraulic system

Aiming at the requirement of eliminating the pressure pulsation and improving the reliability and the life of the aeronautical hydraulic system, a new type of pressure pulse filter for the hydraulic system is designed. Based on the fluid network theory, the theoretical models for the pulse filter and the experimental system are established. Considering the difference of installation mode and load type, the filtering effect of the pulse filter is analyzed. Then the feasibility of the structure and the accuracy of the theoretical analysis are verified through simulation. The fluent software is used in the simulation method, and the throttling load of the system is considered. Finally, the filtering effect of the pulse filter under different working conditions is verified by experiments. The results show that the developed pressure pulse filter has no moving part and compact layout, and has high compatibility with commonly used piston pump, and is one type of the available component to decrease the hydraulic pressure. Moreover, in the range of 300-500 Hz, the pulse filter can eliminate the pulsation of 10 dB in the experiment, meeting the requirement for aircraft hydraulic system. The pulse filter can be applied in aeronautical field in the future.