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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 ...