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RISA Thermohydrodynamic Sparse Mesh Model of Bump Type Foil Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A numerical model for 3D thermohydrodynamic analysis of bumptype foil bearings with a sparse mesh across the air film is described. The model accounts for heat convection into cooling air, thermal expansion of the bearing ...
Thermohydrodynamic Analysis of a Controllable Stiffness Foil Bearing With Shape Memory Alloy Springs: Experimental Tests and Theoretical Predictions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Shape memory alloy (SMA)-gas foil bearings (SMA-GFBs) are novel gas bearings comprising top foil, SMA springs, and housing. The radial clearance, stiffness, and damping coefficients of SMA-GFBs can be regulated by the ...
Experimental Evaluation of the Structure Characterization of a Novel Hybrid Bump Metal Mesh Foil Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Rotors supported by gas foil bearings (GFBs) experience stability problem caused by subsynchronous vibrations. To obtain a GFB with satisfactory damping characteristics, this study presented a novel hybrid bumpmetal mesh ...
Structural Characterization of a Novel Gas Foil Bearing With Nested Compression Springs: Analytical Modeling and Experimental Measurement
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel nested compression spring gas foil bearing (NSFB), which used a series of nested compression springs as compliant supporting structure, was proposed and designed. NSFBs can be easily manufactured and are able to ...
Measurements of the Rotordynamic Response of a Rotor Supported on Porous Type Gas Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A test rig is built in this study to measure the rotordynamic response of a rotor supported on porous-type gas bearings. A rotor with a double impulse turbine at one end is driven by compressed air and supported on two ...
Identification of Dynamic Characteristics of Hybrid Bump-Metal Mesh Foil Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The stability of oil-free high-speed turbo-machinery can be effectively improved by increasing the damping characteristic of the gas foil bearing (GFB). Novel hybrid bump-metal mesh foil bearings (HB-MFBs) have been ...
Full-Size Experimental Investigations on Planetary Gear Journal Bearings in High-Power Wind Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To satisfy the large-scale and high-power demands of wind turbines, planetary gear journal bearings (PGJBs) have been applied in large wind turbine gearboxes (WTGs), as an alternative to traditional rolling bearings, due ...
Numerical and Experimental Investigations on the Lubrication Regime Transition Characteristics of Journal Bearings Used in Wind Turbine Gearboxes
Publisher: The American Society of Mechanical Engineers (ASME)
Full-Size Experimental Investigations on Planetary Gear Journal Bearings in High-Power Wind Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To satisfy the large-scale and high-power demands of wind turbines, planetary gear journal bearings (PGJBs) have been applied in large wind turbine gearboxes (WTGs), as an alternative to traditional rolling bearings, due ...