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Dynamics Of Rotors On Refrigerant Lubricated Gas Foil Bearings
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Book Synopsis Dynamics of Rotors on Refrigerant-Lubricated Gas Foil Bearings by : Leister, Tim
Download or read book Dynamics of Rotors on Refrigerant-Lubricated Gas Foil Bearings written by Leister, Tim and published by KIT Scientific Publishing. This book was released on 2021-10-28 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gas foil bearing (GFB) technology is a key factor for the transition to oil-free rotating machinery. Among numerous advantages, GFBs offer the unique ability to be lubricated with working fluids such as refrigerants. However, the computational analysis of refrigerant-lubricated GFB–rotor systems represents an interdisciplinary problem of enormous complexity. This work pushes forward existing limits of feasibility and establishes a new strategy that enables stability and bifurcation analyses.
Book Synopsis Advances in Active Bearings in Rotating Machinery by : Athanasios Chasalevris
Download or read book Advances in Active Bearings in Rotating Machinery written by Athanasios Chasalevris and published by Springer Nature. This book was released on 2023-06-26 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on cutting-edge experimental and numerical findings related to the application of active bearings, including smart ones, in rotating machinery. It discusses their role in improving stability and control of rotor systems and reports in depth on the corresponding modeling and control approaches. Chapters are based on peer-reviewed contributions to the 1st Workshop on Active Bearings in Rotating Machinery (ABROM 2022), held on June 29- 30, 2022, in Athens, Greece, and organized in collaboration between the School of Mechanical Engineering of The National Technical University of Athens (NTUA) and the Faculty of Mechanical Engineering of Karlsruhe Institute of Technology (KIT). In connection with the increasing digital transformation of machine elements, this book offers a timely perspective and extensive information on testing methods and experimental procedures involved in the development of intelligent rotors for industrial applications.
Author :Aramendiz Fuentes, Jimmy Alberto Publisher :KIT Scientific Publishing ISBN 13 :373151267X Total Pages :180 pages Book Rating :4.7/5 (315 download)
Book Synopsis On the Influence of Piecewise Defined Contact Geometries on Friction Dampers by : Aramendiz Fuentes, Jimmy Alberto
Download or read book On the Influence of Piecewise Defined Contact Geometries on Friction Dampers written by Aramendiz Fuentes, Jimmy Alberto and published by KIT Scientific Publishing. This book was released on 2023-09-12 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work considers dampers that do not solely focus on a single strategy but instead combine them. The capabilities of conventional dry friction dampers are expanded by taking into account piecewise defined contact geometries. This leads to friction dampers that change their behavior depending on the amplitude of the oscillations. The vibration damping device in this work, introduces damping at high oscillation amplitudes and takes advantage of absorption at low oscillation amplitudes.
Book Synopsis Rotordynamics of Gas-Lubricated Journal Bearing Systems by : Krzysztof Czolczynski
Download or read book Rotordynamics of Gas-Lubricated Journal Bearing Systems written by Krzysztof Czolczynski and published by Springer. This book was released on 2012-09-24 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: A discussion of models for the behaviour of gas bearings, particularly of the aspects affecting the stability of the system. The text begins with a discussion of the mathematical models, identifying the stiffness and damping coefficients, and describing the behaviour of the models in unstable regions. It then turns to apply these results to bearings: static characteristics and stability of various rotor systems and an extensive discussion of air rings.
Book Synopsis Dynamic Behavior of Air Lubricated Pivoted-pad Journal Bearing - Rotor System by : Zolton N. Nemeth
Download or read book Dynamic Behavior of Air Lubricated Pivoted-pad Journal Bearing - Rotor System written by Zolton N. Nemeth and published by . This book was released on 1970 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Foil Bearings for Axial and Radial Support of High Speed Rotors by : L. Licht
Download or read book Foil Bearings for Axial and Radial Support of High Speed Rotors written by L. Licht and published by . This book was released on 1978 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flexible-surface thrust and journal foil-bearings of novel design were fabricated, and their performance was convincingly demonstrated, both individually and jointly as a unified rotor-support system. A versatile rig was constructed and instrumented, and experimental results are copiously documented with graphs and oscilloscopic data of trajectories, waveforms, and scans of amplitude response. The thrust bearings combine advantages of surface compliance with the superior load capacity of the spiral-groove configuration. The flexible supports provide means of deliberate control of clearance topography, in contrast to bearings in which the formation of the lubricating wedge is casual and incidental. At speeds of 40,000 to 45,000 rpm and a mean clearance of the order of 15 to 20 micrometers (600 to 800 micro in.), the resilient, air-lubricated, spiral-groove thrust bearings comfortably support a load of 127 N (29 lb; 13 kgf), equivalent to 3.0 N/sq. cm. (4.5 lb/sq in, 0.31 kgf/sq cm). The construction of journal foil-bearings is extremely simple. In one design, a coiled ribbon of plane foil and a retaining cartridge constitute the only components. In another design, the plane foil is integral with a section preformed to an open octagon with rounded vertices. A radical departure from operational characteristics of rigid gas bearings is achieved.
Download or read book Rotor Dynamics written by J. S. Rao and published by New Age International. This book was released on 1996 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Third Revised And Enlarged Edition Of The Book Presents An In-Depth Study Of The Dynamic Behaviour Of Rotating And Reciprocating Machinery. It Evolved Out Of Lectures Delivered At Different Universities Over The Last Two Decades. The Book Deals With Torsional And Bending Vibrations Of Rotors, Stability Aspects, Balancing And Condition Monitoring. Closed Form Solutions Are Given Wherever Possible And Parametric Studies Presented To Give A Clear Understanding Of The Subject. Transfer Matrix Methods Is Extensively Used For General Class Of Rotors For Both Bending And Torsional Vibrations.Special Attentions Are Given To Transient Analysis Of The Rotors Which Is Becoming An Essential Part Of The Design Of High Speed Machinery. Systems With Fluid Film Bearings, Cracked Rotors And Two Spool Rotors Are Also Presented.A First Course On Theory Of Vibration Is A Prerequisite To This Study. Analysis Used Is Fairly Simple, But Sufficiently Advanced To The Requisite Level Of Predicting Practical Observations. As Far As Possible, Practical Examples Are Illustrated, So That The Book Is Also Useful To Practising Engineers.A Special Feature Of This Book Is Diagnostics Of Rotating Machinery Using Vibration Signature Analysis And Application Of Expert Systems To A Field Engineer In Trouble Shooting Work.
Book Synopsis Dynamic Behavior of Air Lubricated Pivoted-pad Journal Bearing - Rotor System: Pivoted Consideration and pad mass by : Zolton N. Nemeth
Download or read book Dynamic Behavior of Air Lubricated Pivoted-pad Journal Bearing - Rotor System: Pivoted Consideration and pad mass written by Zolton N. Nemeth and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research and Development of High Temperature Gas Bearings. Volume 1 - Analysis and Design of Three Gas Bearings for High Temperature Operation by :
Download or read book Research and Development of High Temperature Gas Bearings. Volume 1 - Analysis and Design of Three Gas Bearings for High Temperature Operation written by and published by . This book was released on 1969 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paper written by and published by . This book was released on 1987 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Dynamics of Rotor Bearing Systems by : M. Goodwin
Download or read book The Dynamics of Rotor Bearing Systems written by M. Goodwin and published by Springer. This book was released on 1989-10-12 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Foil Bearings for Axial and Radial Support of High Speed Rotors by : Lazar Licht
Download or read book Foil Bearings for Axial and Radial Support of High Speed Rotors written by Lazar Licht and published by . This book was released on 1978 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on 1982 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance and Durability of High Temperature Foil Air Bearings for Oil-Free Turbomachinery by : C. DellaCorte
Download or read book Performance and Durability of High Temperature Foil Air Bearings for Oil-Free Turbomachinery written by C. DellaCorte and published by . This book was released on 2000 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance and durability of advanced, high temperature foil air bearings are evaluated under a wide range (10-50 kPa) of loads at temperatures from 25 to 650 deg C. The bearings are made from uncoated nickel based superalloy foils. The foil surface experiences sliding contact with the shaft during initial start/stop operation. To reduce friction and wear, the solid lubricant coating, PS 304, is applied to the shaft by plasma spraying. PS304 is a NiCr based Cr2O3 coating with silver and barium fluoride/calcium fluoride solid lubricant additions. The results show that the bearings provide lives well in excess of 30,000 cycles under all of the conditions tested. Several bearings exhibited lives in excess of 100,000 cycles. Wear is a linear function of the bearing load. The excellent performance measured in this study suggests that these bearings and the PS 304 coating are well suited for advanced high temperature, oil-free turbomachinery applications.
Book Synopsis Handbook of Lubrication and Tribology by : George E. Totten
Download or read book Handbook of Lubrication and Tribology written by George E. Totten and published by CRC Press. This book was released on 2006-04-06 with total page 1219 pages. Available in PDF, EPUB and Kindle. Book excerpt: When it was first published some two decades ago, the original Handbook of Lubrication and Tribology stood on technology's cutting-edge as the first comprehensive reference to assist the emerging science of tribology lubrication. Later, followed by Volume II, Theory and Design and Volume III, Monitoring, Materials, Synthetic Lubricants, and Ap
Book Synopsis Proceedings of the 8th Biennial Conference on Engineering Systems Design and Analysis--2006: Dynamic systems and controls. Symposium on design and analysis of advanced structures. Tribology by :
Download or read book Proceedings of the 8th Biennial Conference on Engineering Systems Design and Analysis--2006: Dynamic systems and controls. Symposium on design and analysis of advanced structures. Tribology written by and published by . This book was released on 2006 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Fabrication, and Performance of Foil Journal Bearing for the Brayton Rotating Unit by : Lazar Licht
Download or read book Design, Fabrication, and Performance of Foil Journal Bearing for the Brayton Rotating Unit written by Lazar Licht and published by . This book was released on 1973 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foil bearings were designed and manufactured to replace pivoted-shoe journal bearings in an existing Brayton Cycle turbo-alternator-compressor. The design of this unconventional rotor support was accomplished within the constraints and space limitations imposed by the present machine, and the substitution of foil bearings was effected without changes or modification other machine components. A housing and a test rig were constructed to incorporate the new foil-bearing support into a unified assemble with an air-driven rotor and the gimbal-mounted thrust bearing, seals, and shrouds of an actual Brayton Rotating Unit. The foil bearing required no external pressure source, and stable self-acting rotation was achieved at all speeds up to 43,200 rpm. Excellent wipe-wear characteristics of the foil bearing permitted well over 1000 start-stop cycles with no deterioriation of performance in the entire speed range.
