Engineering Design and Product Reliability

KuP - Gas-Polymer-Lager

Figure 1: Gas polymer bearing

Figure 2: Waterfall diagram of a gas polymer bearing

Figure 3: Testing rig for gas polymer bearings

  • Project: Numerical and experimental investigation of gas polymer bearings
  • Funding: KuP
  • Project duration:  18.04.2017 - 17.04.2023
  • Project description: Gas foil bearings are a special form of aerodynamic air bearing. A characteristic feature of this type of bearing is the low frictional torque after the rotor has been lifted off the ground. Compared to conventional air bearings, gas foil bearings have higher load carrying capacities and better damping characteristics. These improvements are due to the elastic bearing wall. Due to the interaction of the rotor, the pressure field developing in the bearing gap and the elastic structure, optimized lubrication gap geometries are established and the load carrying capacity increases. The improved damping properties are due to frictional processes within the bearing wall. In contrast to previous gas foil bearings, the elastic bearing wall is created using polymers in this research project.
  • Project objective: Development of a non-linear, coupled simulation model as well as experimental validation of the model 
    • Development of a non-linear structural model for polymers
    • Integration of the structural model into a coupled rotor-bearing model
    • Numerical investigation of the system for different polymers
    • Construction of prototypes
    •  Design of testing rigs
    • Experimental investigations of the structure, bearing geometry, and lift-off and rotordynamic behavior
  • Publications:
    • [1] G., Schilling; R. Liebich: "Numerical Description of a Rotor Supported by Gas Polymer Bearings for Time Domain Simulation – Implementation and Parametrization of the Structure Model". SIRM 2019, 13th International Conference on Dynamics of Rotating Machines, Copenhagen, Denmark, 13th – 15th February 2019.

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