Calculations of load rotational moment and rating power of centrifuges with rotation arms

YIN Yihui, LIU Yuandong, WANG Xinlun, YU Shaorong
(Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, China)

Abstract: In order to solve the problem that the chosen electromotor based on previous calculations could not accurately provide needed rotational moment and power for dynamic centrifuges with rotational arms, the method to determine rating power of the driving electromotor of a centrifuge with rotational arms was investigated. After the analysis of total rotational moment acted on and the total power consumed by the load, the formulas of the maximum total load rotational moment and the maximum total load power were established according to the operation curve of the centrifuge. A method was presented to calculate the rating power of the driving electromotor. And an analytical computational example was carried out. The results show that the present method is much more accurate than previous ones.
Key words: centrifuge with rotational arms; load rotational moment; load power; rating power