Practical Balancing of Rotating Machinery

Author: Derek Norfield
Publisher: Elsevier
ISBN: 9780080459387
Format: PDF, Kindle
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Rotating machinery (eg pumps, motors, compressors) is normally manufactured to precise measurements but there comes a point when the costs of manufacture mean that further precision is not cost-effective and thus any slight imbalance inherent in the machine will need to be attended to after manufacture. When such machinery is in operation, often at very high speeds of thousands of revs per minute, any imbalance will set up vibration and often noise. In addition, such imbalance will cause extra wear and loss of efficiency in the machine. The answer is to balance the affected parts of the machine so that it operates smoothly and efficiently. This book is a practical account of such balancing techniques e.g how to balance a rotor, how to set up and verify performance of a balancing machine, and procedures for on-site balancing. In addition, other common causes of vibration will be covered e.g. misalignment, bad bearings and looseness. This book is the distillation of a successful course run by the author and developed over 20 years. University engineering departments do not teach balancing techniques beyond the very basic, and there is a need for educators and engineers to have a practical book available on the topic. · A practical book which will help the reader understand the importance of balance in today's high technology world · Outlines the history of dynamic balancing and other vibration reduction techniques · Profusely illustrated throughout

Rotating Machinery

Author: Robert B. McMillan
Publisher: The Fairmont Press, Inc.
ISBN: 0881734675
Format: PDF, Docs
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A theoretical and practical understanding of unbalance and misalignment in rotating equipment is presented here. These two conditions account for the vast majority of problems with rotating equipment encountered in the real world.;Numerous examples and so.

Vibrations of Rotating Machinery

Author: Osami Matsushita
Publisher: Springer
ISBN: 4431554564
Format: PDF, ePub, Mobi
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This book opens with an explanation of the vibrations of a single degree-of-freedom (dof) system for all beginners. Subsequently, vibration analysis of multi-dof systems is explained by modal analysis. Mode synthesis modeling is then introduced for system reduction, which aids understanding in a simplified manner of how complicated rotors behave. Rotor balancing techniques are offered for rigid and flexible rotors through several examples. Consideration of gyroscopic influences on the rotordynamics is then provided and vibration evaluation of a rotor-bearing system is emphasized in terms of forward and backward whirl rotor motions through eigenvalue (natural frequency and damping ratio) analysis. In addition to these rotordynamics concerning rotating shaft vibration measured in a stationary reference frame, blade vibrations are analyzed with Coriolis forces expressed in a rotating reference frame. Other phenomena that may be assessed in stationary and rotating reference frames include stability characteristics due to rotor internal damping and instabilities due to asymmetric shaft stiffness and thermal unbalance behavior.

Balancing of High Speed Machinery

Author: Mark S. Darlow
Publisher: Springer Science & Business Media
ISBN: 1461236568
Format: PDF, ePub
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Modern rotating machinery, particularly turbomachinery, is frequently being designed to operate at higher speeds than in the past. Consequently, there is an increased need to balance high-speed rotors. The purpose of this book is to provide the engineering student or practicing engineer with a single, complete reference on high-speed rotor balancing. To this end, a detailed analytical background and practical application procedures are presented for each of the principal high-speed rotor balancing methods, i.e. modal balancing, influence coefficient balancing and the Unified Balancing Approach. This information is supplemented and supported through a presentation of the theoretical development of synchronous rotor vibration and a brief overview of rigid rotor balancing techniques and machines. This is the first time this material is available in a single, concise volume, together with detailed descriptions of application procedures.

Advances in Design Simulation and Manufacturing

Author: Vitalii Ivanov
Publisher: Springer
ISBN: 3319935879
Format: PDF, ePub
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This book reports on topics at the interface between manufacturing, mechanical and chemical engineering. It gives a special emphasis to CAD/CAE systems, information management systems, advanced numerical simulation methods and computational modeling techniques, and their use in product design, industrial process optimization and in the study of the properties of solids, structures and fluids. Control theory, ICT for engineering education as well as ecological design and food technologies are also among the topics discussed in the book. Based on the International Conference on Design, Simulation, Manufacturing: The Innovation Exchange (DSMIE-2018), held on June 12-15, 2018, in Sumy, Ukraine, the book provides academics and professionals with a timely overview and extensive information on trends and technologies behind current and future developments of Industry 4.0, innovative design and renewable energy generation.

Proceedings of the 10th International Conference on Rotor Dynamics IFToMM

Author: Katia Lucchesi Cavalca
Publisher: Springer
ISBN: 3319992724
Format: PDF
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IFToMM conferences have a history of success due to the various advances achieved in the field of rotor dynamics over the past three decades. These meetings have since become a leading global event, bringing together specialists from industry and academia to promote the exchange of knowledge, ideas, and information on the latest developments in the dynamics of rotating machinery. The scope of the conference is broad, including e.g. active components and vibration control, balancing, bearings, condition monitoring, dynamic analysis and stability, wind turbines and generators, electromechanical interactions in rotor dynamics and turbochargers. The proceedings are divided into four volumes. This fourth volume covers the following main topics: aero-engines; turbochargers; eolian (wind) generators; automotive rotating systems; and hydro power plants.

Vibration of Structures and Machines

Author: Giancarlo Genta
Publisher: Springer Science & Business Media
ISBN: 9780387985060
Format: PDF, ePub
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This book addresses important aspects of nonlinear vibration analysis, presenting cases of interest to researchers and engineers. Developing the subject from its foundations, the book takes readers through vibrations in linear systems and then into nonlinear vibrations, including a treatment of chaotic vibrations. In this third edition, the classical approach to vibration and the modern approach through dynamical systems theory have been integrated; the material on control and active systems has been completely rewritten; and material relevant to mechatronics has been added.

Rotor Dynamics

Author: J. S. Rao
Publisher: New Age International
ISBN: 9788122409772
Format: PDF, Mobi
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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.

Balancing of rigid and flexible rotors

Author: Neville F. Rieger
Publisher:
ISBN:
Format: PDF, Docs
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Rotor unbalance is a basic concern in the design and operation of machinery because it is a major cause of excessive vibration. An early flexible- rotor balancing technique, was based on mode shapes (modal method). Moore demonstrated the practical application of the method to heavy rotating equipment. The controversy between modal and influence coefficient methods began with Goodman's formulation in 1962 of the influence coefficient methods Thearle for flexible rotors. The exact-point speed method, which was developed for multiple planes and speeds, evolved into the least squares method. This method depends heavily on computers, good measurements, and rigid procedures whereas the modal approach involved physical insight. In the late 1970s, the opposing factions, represented by Parkinson of the U.K., an advocate of the modal method, and Smalley of the U.S., an advocate of the influence coefficient method, worked together to develop the unified method of flexible rotor balancing. This method includes aspects of both the modal and influence coefficient methods. Keywords: Stiffness, Damping.