微型脉冲管制冷机调相部件的数值模拟和实验研究

Numerical Simulation and Experiment Analysis of Phasor Shift of a Micro Pulse Tube Cryocooler

由于脉冲管制冷机冷端没有运动部件,具有可靠性高、寿命长、振动小等优点,非常适合应用于空间领域。本文介绍了一款微型脉冲管制冷机的基本结构、数值模拟和实验性能,其线性压缩机采用动磁式结构,板弹簧支撑和间隙密封技术,膨胀机的蓄冷器和脉冲管为同轴型布置,这种结构使冷头与器件之间的耦合非常方便。使用SAGE软件对脉冲管制冷机的调相机构进行数值模拟,并对模拟结果进行实验验证。

With no moving parts at cold head, the pulse tube cryocooler has merits of high reliability, long life and low vibration, which are evident advantages in space use. Basic structure, numerical simulation and experiment performance of a micro pulse tube cryocooler（C391） are introduced in this paper. The compressor is driven by a moving-magnet linear motor, supported by flexure bearings and clearance seal technology, and the expander is with coaxial structure between regenerator and pulse tube, which is very convenient for coupling between cold head and infrared devices. The phasor shift characteristics of C391 is simulated using SAGE software, and it is verified by experiments.