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一、本文的目的 脉管制冷法发明于六十年代,称为基本脉管。七十年代末出现了改进型,称为小孔脉管,后来又经不断改进,制冷温度达到实用要求,从而把这种新颖的制冷方法推进到实甩化的研究阶段,引起高技术和军工部门的很大兴趣。1989年西安交大热工教研室脉管研究组进一步提出了双向进气脉管制冷方案,并获得专利。试验表明,双向进气小孔脉管比之当今国内外常规的单向进气小孔脉管可以达到更低的制冷温度,而且方法简便可行。然而,脉管制冷内部过程复杂,详尽的理论和试验工作尚很缺乏。本文的目的是由实验探索阀门开度、脉动频率、充气压力等对脉管内部压力波形的调相调幅作用。因为文献[1]已分析表明,脉管内部动态参数幅值和相位的变化对其制冷过程有着直接的影响。
First, the purpose of this article Pipe cooling law invented in the sixties, called the basic vessel. The late seventies of the improved type, known as the pinhole vessel, and later has been continuously improved, the refrigeration temperature to meet practical requirements, so that this new method of cooling to the real rejection of the research stage, causing high-tech and military Department of great interest. 1989 Xi’an Jiaotong University Thermal Engineering Vascular Research Group further proposed bidirectional inlet pulse tube cooling scheme and obtained the patent. Experiments show that the bi-directional air inlet micro-orifice vessels can reach a lower refrigeration temperature than the conventional one-way air inlet micro-orifice vessels at home and abroad, and the method is simple and feasible. However, the internal process of pulse tube refrigeration is complex and exhaustive theoretical and experimental work is still lacking. The purpose of this paper is to experimentally explore the valve opening, pulse frequency, inflation pressure on the internal pressure waveform modulation and amplitude modulation effect. Since the literature [1] has been analyzed, the variation of the amplitude and phase of the dynamic parameters in the vessel has a direct impact on the cooling process.