At first, authors established an experimental system to acquire crankcase pressure signal and vibration acceleration signal.
通过搭建试验台架，从实车试验中获取曲轴箱压力信号和机身振动加速度信号；
Return oil is equally divided, and uniform crankcase pressure and oil level are purposely kept in equilibration parallel system.
油气平衡式并联技术平均分配回油，并强调气压和油位的平衡。
The dynamic technology ranks the compressors according to the crankcase pressure levels, and return oil is not distributed equally but according to the order based on the ranks.
非平衡并联机技术建立了压缩机回气压力等级，并按等级高低分配回油。
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