某火炮液压缓冲器缓冲特性研究

Study on the Buffer Characteristics of Artillery Hydraulic Buffer

针对某火炮液压缓冲器在工作过程中流道结构变化的特点,在Fluent软件中建立了缓冲器的等效流场模型;根据伯努利方程,由工作腔压力推导反映液体流动过程受流道结构特征和流速影响的压力损失的液压阻力系数K,分析了流速、节流杆直径与液压阻力系数K之间的关系。将系数K动态取值的方法应用到某火炮运动机构仿真分析中,通过试验对比缓冲器活塞杆位移验证了系数K动态取值方法的合理性。

In view of the change of channel structure of a artillery hydraulic buffer during its working process,the problem of how to select the hydraulic resistance coefficient K was studied. The equivalent flow field model of the buffer was built in Fluent. According to the Bernoulli equation,the coefficient K was derived from the pressure of working chambers. The relationship between the velocity,the diameter of the control rod and the hydraulic resistance coefficient K was analyzed. The method of choosing dynamic value of K was applied to a simulation model of a motion mechanism. By comparing the displacement of the piston rod with the test data,the rationality of the selection method of K was verified.