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    • Study on Torsional Vibration Response of Compressor Flexible Rotor System Considering Collision Clearance

    Cheng Wang,Zhiqiang Huang,Tao Li,Jie Wang

    International Journal of Non-Linear Mechanics（2025）

    Southwest Petroleum University

    Cited 0|Views2
    Abstract
    In order to explore the influence of clearance and flexibility on the torsional vibration of compressor rotor system, a torsional vibration calculation model of compressor crankshaft system considering the influence of contact clearance and flexibility characteristics is proposed. The simulation results show that rub-impact occurs between the second and fourth rows of crankshaft bushing and pin shaft. In addition, the transmission torque of the coupling is lost by 7.1%. At the same time, the compressor vibration test experiment was carried out, and the vibration velocity error of the free end of the crankshaft system under the experiment and simulation was 11.9%, which verified the accuracy of the research method and model. Based on this, the torsional vibration dynamic response of crankshaft system under different clearances and different driving speeds is further carried out. The results show that the larger the clearance and speed, the worse the power transmission matching of the crankshaft system, however, the standard deviation of piston acceleration shows a trend of high-low-high with the increase of rotational speed, indicating that there is room for adjustment of rotational speed. The research has certain guiding significance for improving the operation stability of the compressor.
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    Key words
    reciprocating compressor,crankshaft torsional vibration,collision clearance,flexible multibody dynamics,resonance
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