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许多文献[2]、[3]介绍活塞式压缩机当其进气管长满足强制脉冲二次谐波的谐振条件时,能提高排气量,同时给出进气管共振管长的计算公式。文献还指出,按这些公式计算出的共振管长,与实际有很大差别。因为这些公式没有考虑系统如此重要的声学元件的影响,也没有考虑气缸的变化容积以及气缸联接管内压力最大程度增高的时刻同吸气阀关闭时刻之间的关系。吸气阀关闭时刻气缸内压力增高的程度,是最终决定利用进气管内气体的压力波动效应提高活塞式压缩机排气量的关键。
Many literatures [2], [3] introduce that when the intake pipe length meets the resonance condition of the second harmonic of the forced pulse, the piston compressor can increase the exhaust volume and give the calculation formula of the resonance pipe length of the intake pipe. The literature also pointed out that according to these formulas to calculate the resonance tube length, and the actual is very different. Since these equations do not take into account the influence of the system’s so-called acoustic elements, they do not take into account the variation volume of the cylinder and the relationship between the moment when the maximum pressure in the cylinder connection increases and the closing moment of the suction valve. When the suction valve is closed, the degree of increase of the pressure in the cylinder is the key to ultimately determine the displacement of the piston compressor by utilizing the pressure fluctuation effect of the gas in the intake pipe.