Research on dynamic behaviors of counter-rotating cylindrical roller bearing based on quasi-dynamic method

The characteristics of the counter-rotating cylindrical roller bearing directly affect the stability and reliability of the aero-engine. In order to study dynamic behaviors of counter-rotating cylindrical roller bearing, based on elasto-hydrodynamic lubrication theory, hydrodynamic lubrication theory as well as the quasi-dynamic analysis method, a new quasi-dynamic model of the counter-rotating cylindrical roller bearing is established. And then, this model is utilized to verify rollers sliding ratio. As the radial load increases, the calculated values decrease from 7% to 2%, which agree well with the experimental data. Moreover, the model is used to calculate and analyze the dynamic behaviors of counter-rotating cylindrical roller bearing. The distribution of dynamic load and rotating speed of the counter-rotating bearing is studied in operation and the rotating sliding ratio of the counter-rotating bearing is discussed in different conditions. Results show that the load distribution in the loaded zone is more even in the inverted configuration than it in the natural configuration, while the slipping of the rollers in the unloaded zone and the cage is more serious in the inverted configuration.