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RISOperation of Foil Bearings Beyond the Bending Critical Mode
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A series of experiments were conducted to determine a foil bearings ability to operate in the region of the bending mode of a flexible rotor. Three different bearings, spaced at three different ...
Characterization of Pelletized MoS2 Powder Particle Detachment Process
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A recently postulated concept of friction between solids states that the process exhibits elements of quasi-hydrodynamic lubrication in which the wear particles shed from one or both surfaces ...
Load Capacity and Durability of H-DLC Coated Hydrodynamic Thrust Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Hydrogenated diamondlike carbon (H-DLC) coatings provide excellent wear resistance and low friction for bearing applications. However, the use of such coatings with aqueous lubricants could pose ...
On the Frictional Damping Characterization of Compliant Bump Foils
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High-speed rotor systems use either fluid film or rolling element bearing supports, depending upon their design and operating constraints. Regardless of bearing type used, these systems require ...
Evaluation of DLC Coatings for High-Temperature Foil Bearing Applications
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Diamondlike carbon (DLC) coatings, particularly in the hydrogenated form, provide extremely low coefficients of friction in concentrated contacts. The objective of this investigation was to evaluate ...
Structural Damping of Self-Acting Compliant Foil Journal Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes an experimental investigation into the dynamic characteristics of corrugated foil (bump foil) strips used in compliant surface foil journal bearings and dampers. In the ...
Compliant Foil Bearing Structural Stiffness Analysis—Part II: Experimental Investigation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes the second part of an investigation into the mechanism of deformation of the corrugated foil (bump foil) strips used in compliant surface foil bearings. In the earlier ...
Advancements in the Structural Stiffness and Damping of a Large Compliant Foil Journal Bearing: An Experimental Study
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the results of an experimental investigation into the dynamic structural stiffness and damping characteristics of a 21.6‐cm(8.5in.)-diameter compliant surface foil journal bearing. ...
Comparative Evaluation of MoS2 and WS2 as Powder Lubricants in High Speed, Multi-Pad Journal Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: As part of a program to develop solid/powder-lubricated journal bearings, a comparative evaluation has been performed to aid in determining whether MoS2 and WS2 powder are suitable lubricants ...
Analysis of Gas Lubricated Foil Thrust Bearings Using Coupled Finite Element and Finite Difference Methods
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Load performance of gas lubricated, compliant surface foil thrust bearings has an interlocking relationship with the compliance of the bearing and hydrodynamics of convergent wedge surface. ...