【作者】 郭长虹； 史俊强； 权凌霄； 李长春；

【Author】 GUO Chang-hong;SHI Jun-qiang;QUAN Ling-xiao;LI Chang-chun;School of Mechanical Engineering, Yanshan University;Shanghai Aircraft Design and Research Institute;

【机构】 燕山大学机械工程学院； 上海飞机设计研究院；

【摘要】 轴向柱塞泵工作产生的流量脉动和机械振动绝大部分通过液压管路向系统中传递。采用蓄能器等常见的泵口流量脉动吸收装置虽然取得了较好效果,但是对于振动控制和系统可靠性要求更好的飞机液压系统,仍有一些不足。本文基于仿生学思想,结合四足动物心脏出口血管能够承受瞬间高压大流量血液脉动的生物学特点,提出一种新型仿生式液压管路,其具有"外刚内柔,内壁超滑"的特点,从而使其能够直接吸收流量脉动,而且避免了泵口管路中湍流的产生,能够更好地从源头吸收航空液压泵口流量脉动并抑制管路振动。针对仿生式液压管路的结构优点,参考某型飞机液压泵口不锈钢液压管路参数,在ANSYS软件平台中建立该不锈钢液压管路和仿生式液压管路的双向液固耦合动力学模型,利用Workbench对模型进行迭代解耦,得到各自对应的流量脉动及管路振动结果。结果表明,所设计的仿生式液压管路对流量脉动的吸收及管路振动的抑制具有更好的效果,为管路振动控制提供新的技术途径。更多还原

【Abstract】 Flow pulsation and mechanical vibration generated by axial piston pump are mostly transmitted through hydraulic pipeline to the system. Although it obtains good effect to use the common method of absorbing pump flow pulsation, for example, accumulator and other devices, there are still some deficiencies for the aircraft hydraulic systems which have higher requirements for the vibration control and system reliability. Combining the principle of bionics with the biological characteristics that the blood vessel of quadruped heart outlet can withstand instantaneous high pressure and large flow blood pulsation, this paper put forward a new type of bionic hydraulic pipeline which have a hard outer wall and a soft and smooth inner wall. The characteristics make it can directly absorb the flow pulsation and avoid the generation of turbulence in the pipeline of pump outlet. So it can better absorb the flow pulsation from source in the aero hydraulic pump outlet, and then suppress the pipeline vibration. According to the advantages of bionic hydraulic pipeline structure and the parameters hydraulic stainless steel pipeline in hydraulic pump outlet of a certain aircraft, we establish two-way fluid solid coupling dynamics model of the stainless steel and bionic hydraulic pipeline in ANSYS, then solve the above model with the method of iteration decoupling in Workbench, and finally, get the corresponding results of flow pulsation and pipeline vibration. The results show that the bionic hydraulic pipeline has a better effect on the absorption of flow pulsation and the suppression of the pipeline vibration, and it is a new technical approach for the vibration control of the pipeline.更多还原