Theoretical investigation of hybrid foil-magnetic bearings on operation mode and load sharing strategy

This paper presents a theoretical investigation on operation mode and load sharing strategy of hybrid foil-magnetic bearings (HFMBs). According to the inherent characteristics gas foil (GFBs) active magnetic (AMBs), six possible work scopes are discussed understand HFMBs. A numerical model coupling calculations film pressure in GFBs forces AMBs is conducted predict performance The accuracy proved by comparing predicted tested friction torques. Analysis static dynamic HFMBs within three representative cases varying ratio. supporting stiffness position can be obviously enhanced adjusting operating strategy. Results show that direct damping adopting significantly higher than those AMB or GFB independent mode.