Abstract: Through the analysis of shaft load in running rotary compressor, researched the changes of shaft load size and direction with Rotary simulation software, obtained that the relation between the power consumption and the lower bearing assemble. The results show that the theoretical analysis was verified by experimental data. Finally confirmed that the lower bearing assembled in the third quadrant can enhance the performance of the compressor, and this analysis method can provide guidance and basis for technics of the lower bearing assemble.

Key words: Rotary compressor, Underside bearing assemblage, Power and capability, Load of shaft