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Practical Rotordynamics and Fluid Film Bearing Design

Practical Rotordynamics and Fluid Film Bearing Design
Author: Wen Jeng Chen
Publisher:
Total Pages: 0
Release: 2015-09-09
Genre: Bearings (Machinery)
ISBN: 9781490762296

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Includes bibliographical references and index.


Thermohydrodynamic Instability in Fluid-Film Bearings

Thermohydrodynamic Instability in Fluid-Film Bearings
Author: J. K. Wang
Publisher: John Wiley & Sons
Total Pages: 216
Release: 2016-01-07
Genre: Science
ISBN: 1118536347

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Thermohydrodynamic Instability in Fluid-Film Bearings aims to establish instability criteria for a rotor-bearing system associated with fluid-film journal bearings. • It focuses on how the influencing factors such as rotor flexibility, manufacturing imperfections such as residual shaft unbalance, and service-related imperfections such as uneven wear affect the stability of a rotor-bearing system • It shows how the specific operating conditions such as oil inlet temperature, inlet pressure, and inlet position of a rotor-bearing system directly influence the system stability • General design guidelines have been summarized to guide the engineering system design and the correction of failure and/or malfunction


Rotor and Structural Dynamics of Turbomachinery

Rotor and Structural Dynamics of Turbomachinery
Author: Raj Subbiah
Publisher: Springer
Total Pages: 306
Release: 2018-01-16
Genre: Technology & Engineering
ISBN: 331973296X

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This book provides engineers and scientists with practical fundamentals for turbomachinery design. It presents a detailed analysis of existing procedures for the analysis of rotor and structure dynamics, while keeping mathematical equations to a minimum. Specific terminologies are used for rotors and structures, respectively, allowing the readers to clearly distinguish between the two. Further, the book describes the essential concepts needed to understand rotor failure modes due to lateral and torsional oscillations. It guides the reader from simple single-degree-of-freedom models to the most complex multi-degree-of-freedom systems, and provides useful information concerning steel pedestal stiffness degradation and other structural issues. Fluid-film bearing types and their dynamical behavior are extensively covered and discussed in the context of various turbomachinery applications. The book also discusses shaft alignment and rotor balancing from a practical point of view, providing readers with essential information to help them solve practical problems. As the main body of the book focuses on the diagnostics and description of case studies addressing the most pressing practical issues, together with their successful solutions, it offers a valuable reference guide, helping field engineers manage day-to-day issues with turbomachinery.


Rotor Dynamics

Rotor Dynamics
Author: J. S. Rao
Publisher: New Age International
Total Pages: 460
Release: 1996
Genre: Rotors
ISBN: 9788122409772

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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.


Rotors Mounted on Fluid Film Bearings

Rotors Mounted on Fluid Film Bearings
Author: Madhumita Kalita
Publisher: LAP Lambert Academic Publishing
Total Pages: 148
Release: 2011-07
Genre:
ISBN: 9783838366517

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Stability analysis of high-speed machinery based on rigid rotor model mounted on rigid supports was found to be inadequate for stability predictions. But in actual practise bearings have some flexibility. Stiffness and damping properties of fluid film bearings alter the critical speeds of a rotor. Dynamic coefficients of fluid film bearing are dependent on speed, geometry of the bearing and other operating conditions. Plain circular bearings do not suit the stability requirements of high-speed machines and precision machine tools. Alternate bearing designs are sought to meet the new requirements. But a very little information is available in this field. In this work dynamic characteristics and stability of rotor-bearing system supported on circular and non-circular hydrodynamic bearings (short bearing and finite bearing) is studied. To demonstrate the worth of the study, it is proposed to take up models like bearings supporting rigid rotor and simplified flexible rotors for different bearing configurations. This study appears to provide a better understanding of this type of problem and the present results should be utmost importance to rotor-bearing system designers and analyst.