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本文对双作用脉管制冷机试验中出现的双频率现象进行分析,分析了系统中压缩机参数的不一致性对系统性能的影响,利用DeltaEc软件进行数值模拟,分别考察了压缩机的机械参数(动质量、弹簧刚度、机械阻尼)和电参数(电机内阻)等出现不一致时对系统性能的影响。计算表明当系统中的各个部件结构参数完全一致时,其工作状态也是相同的。当其中一个压缩机单个参数发生变化时,三个单元的工作状态均会受到不同程度的影响。
In this paper, we analyzed the double frequency phenomenon in the double-acting pulse tube refrigerator experiment, analyzed the influence of the inconsistency of the compressor parameters on the system performance, and used DeltaEc software to conduct numerical simulation. The mechanical parameters of the compressor Dynamic mass, spring stiffness, mechanical damping) and electrical parameters (motor resistance) and other inconsistencies in the system performance. Calculations show that when the structural parameters of the various components in the system are exactly the same, their working conditions are the same. When one of the compressor parameters changes, the working status of the three units will be affected to varying degrees.