This paper presents theoretical calculation results of the axis excitation force associated with compression operation of a three-cylinder rotary compressor, and shows that the axis excitation force is reduced to about 30% of that of a two-cylinder rotary compressor. Our paper has performed an axis behavior analysis, and clarifies that the axis runout amplitude of the upper end of the crankshaft during high-speed rotation is reduced by 55% by improving counter balancer arrangement. To demonstrate these effects, we measured vibration and sound of a three-cylinder prototype with a 20% larger displacement volume than a two-cylinder maximum model, and compared them with that two-cylinder model. The vibration due to compression force fluctuation was reduced to less than 30%, and the vibration due to axis runout moment was also reduced to about half. The sound overall value at a rotation speed of 90 rps was reduced three decibels.

本文介绍了与三缸回转式压缩机压缩运行相关的轴向激振力的理论计算结果，表明轴向激振力降低到两缸回转式压缩机的 30% 左右。我们的论文进行了轴行为分析，阐明了通过改进平衡器布置，曲轴上端在高速旋转时的轴跳动幅度降低了55%。为了证明这些效果，我们测量了排量比两缸最大模型大 20% 的三缸原型的振动和声音，并将它们与两缸模型进行了比较。压缩力波动引起的振动降低到30%以下，轴跳动力矩引起的振动也降低了一半左右。