Abstract: A prototype of 2D pressure servo-valve was designed by using Bourdon tube for servo feedback equipment to keep output pressure constant. Aiming at Bourdon tube, which was linearly changed with pressure variations in a particular range, based on the analysis of its deformation mechanism, a mathematical model was established and its deformation processes were simulated, the influences of its structural parameters on linear deformation were presented. The linear deformation experiments of Bourdon tube and its test stand were designed and built, experimental results show that the deformation has nearly linear relationship with pressure risings, the linear deformation range is as 0.7mm when system pressure is of 16MPa. In dynamic experiments of Bourdon tube, it took about 0.9ms from impacts to basic stabilizing. Experimental results and simulated analysis are basically consistent, the research lays the foundation for the applications in a 2D pressure servo-valve.

Key words: Bourdon tube, pressure servo-valve, servo feedback, static and dynamic characteristics

摘要： 设计了2D压力伺服阀样机模型，利用波登管作为伺服压力反馈单元保持其输出压力恒定。针对波登管在特定范围内随压力线性变形的特性，在分析其变形机理的基础上，建立了数学模型，仿真分析了其受力变形过程，得到其结构参数对线性变形的影响。设计了波登管线性变形实验方案并搭建实验平台，实验结果表明：随着压力的升高，波登管的变形与压力升高基本成线性关系，16MPa时，其线性变形量为0.7mm； 动态实验中波登管从受冲击开始到基本稳态耗时约0.9ms。实验结果与仿真分析基本一致，波登管的特性研究为其在2D压力伺服阀上的应用奠定了基础。

关键词: 波登管, 压力伺服阀, 伺服反馈, 静动态特性