Vibration Analysis of Rotating Machinery Under Induced Unbalance, Shaft Misalignment, and Coupling Deformation

Vibration Analysis of Rotating Machinery Under Induced Unbalance, Shaft Misalignment, and Coupling Deformation
Author: Gustavo Ibarguen
Publisher:
Total Pages:
Release: 2015
Genre:
ISBN:

Rotating machinery is used in a variety of essential engineering systems, including motors, pumps, compressors, and gearboxes. The gas, oil, power, manufacturing, and process industries rely heavily on rotating machines. Their failures can be very expensive and lead to a decrease in production so proper maintenance is essential. Condition based maintenance is a relatively new strategy of performing maintenance on equipment when signal processing of sensor signals indicates a failure may be imminent. The most popular sensors for condition based maintenance measure the vibration of the rotating machine. These sensors provide information about the overall state of the machine and point to potential faults. This thesis studies the effectiveness of analyzing vibration data to determine the state of operation of rotating machine systems. Specifically, research and experiments are performed to discover if vibration signatures can determine if a system has certain faults, such as shaft misalignment, unbalance, or deformation in shaft couplings. The presence or absence of these faults can lead to the determination of the health of operation of a rotating machine system.

Rotating Machinery Vibration

Rotating Machinery Vibration
Author: Maurice L. Adams
Publisher: CRC Press
Total Pages: 376
Release: 2000-10-24
Genre: Technology & Engineering
ISBN: 0824745418

This comprehensivereference/text provides a thorough grounding in the fundamentals of rotating machinery vibration-treating computer model building, sources and types of vibration, and machine vibration signal analysis. Illustrating turbomachinery, vibration severity levels, condition monitoring, and rotor vibration cause identification, Rotating Machinery Vibration Provides a primer on vibration fundamentals Highlights calculation of rotor unbalance response and rotor self-excited vibration Demonstrates calculation of rotor balancing weights Furnishes PC codes for lateral rotor vibration analyses Treats bearing, seal, impeller, and blade effects on rotor vibration Describes modes, excitation, and stability of computer models Includes extensive PC data coefficient files on bearing dynamics Providing comprehensive descriptions of vibration symptoms for rotor unbalance, dynamic instability, rotor-stator rubs, misalignment, loose parts, cracked shafts, and rub-induced thermal bows, Rotating Machinery Vibration is an essential reference for mechanical, chemical, design, manufacturing, materials, aerospace, and reliability engineers; and specialists in vibration, rotating machinery, and turbomachinery; and an ideal text for upper-level undergraduate and graduate students in these disciplines.

Rotating Machinery Vibration

Rotating Machinery Vibration
Author: Maurice L. Adams
Publisher: CRC Press
Total Pages: 478
Release: 2010-08-09
Genre: Technology & Engineering
ISBN: 143984755X

Diagnosis and correction are critical tasks for the vibrations engineer. Many causes of rotor vibration are so subtle and pervasive that excessive vibration continues to occur despite the use of usually effective design practices and methods of avoidance. Rotating Machinery Vibration: From Analysis to Troubleshooting provides a comprehensive, consolidated overview of the fundamentals of rotating machinery vibration and addresses computer model building, sources and types of vibration, and machine vibration signal analysis. This reference is a powerful tool to strengthen vital in-house competency on the subject for professionals in a variety of fields. After presenting governing fundamental principles and background on modern measurement, computational tools, and troubleshooting methods, the author provides practical instruction and demonstration on how to diagnose vibration problems and formulate solutions. The topic is covered in four sequential sections: Primer on Rotor Vibration, Use of Rotor Dynamic Analyses, Monitoring and Diagnostics, and Troubleshooting Case Studies. This book includes comprehensive descriptions of vibration symptoms for rotor unbalance, dynamic instability, rotor-stator rubs, misalignment, loose parts, cracked shafts, and rub-induced thermal bows. It is an essential reference for mechanical, chemical, design, manufacturing, materials, aerospace, and reliability engineers. Particularly useful as a reference for specialists in vibration, rotating machinery, and turbomachinery, it also makes an ideal text for upper-level undergraduate and graduate students in these disciplines.

Vibrations of Rotating Machinery

Vibrations of Rotating Machinery
Author: Osami Matsushita
Publisher: Springer
Total Pages: 367
Release: 2017-05-22
Genre: Technology & Engineering
ISBN: 4431554564

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.

Vibration Problems of Rotating Machinery Due to Coupling Misalignments

Vibration Problems of Rotating Machinery Due to Coupling Misalignments
Author: Frederick Lee Barber
Publisher:
Total Pages: 280
Release: 1988
Genre: Mechanical engineering
ISBN:

Vibrational analysis of rotating machinery is able to identify a large number of system ills. Shaft bow, shaft unbalance and coupling misalignments make up the major portion of the observed vibrational frequency spectra of rotating machinery. These vibrational spectra can be used to determine the type of rotating system abnormality, the degree of misalignment and the rate of alignment degradation. The proper joining of rotating machinery is a critical issue with high power and a high speed equipments. Couplings used to join machinery have a broad spectrum of characteristics and specific purposes. Couplings are used to compensate for axial, lateral and angular misalignments. In addition, couplings may exhibit constant or non-constant input versus output speed relationships. The importance of mating a driving and driven piece of equipment with the properly designed coupling is paramount. In the following report the author discusses numerous types of couplings, the behavioral characteristics of couplings and the considerations which must be taken into account when selecting a coupling for a rotating system. The analysis which follows list the various alignment discrepancies which can be detected by vibrational analysis and the requirements for non-constant and constant velocity characteristics of couplings. In addition, numerous types of couplings are catalogued and discussed. Theses. (FR).

Machinery Vibration Alignment

Machinery Vibration Alignment
Author: Victor Wowk
Publisher: McGraw Hill Professional
Total Pages: 400
Release: 2000
Genre: Technology & Engineering
ISBN: 9780070719392

Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. How-to-do-it guide to eliminating machine vibrations One of the most common causes of severe machinery vibration is the misalignment of drive shafts and othercomponents. Machinery Vibration: Alignment, by Victor Wowk, gives you a practical resource for aligning shafts, bearings, gears, pulleys and a wide variety of power transmission components in machines without further training. You get step-by-step procedures for balancing, resonance, structural vibrations, isolation, instruments, diagnostics, and trending. Many of the methods described require only simple tools, eliminating the need for a $20,000 laser alignment system. Case studies covering everything from simple fans to high-speed turbines give you examples of real-world problem solving. You will find the extensive coverage of the FFT spectrum analyzer a valuable addition to this hands-on toolkit.

Practical Machinery Vibration Analysis and Predictive Maintenance

Practical Machinery Vibration Analysis and Predictive Maintenance
Author: Cornelius Scheffer
Publisher: Elsevier
Total Pages: 263
Release: 2004-07-16
Genre: Technology & Engineering
ISBN: 0080480225

Machinery Vibration Analysis and Predictive Maintenance provides a detailed examination of the detection, location and diagnosis of faults in rotating and reciprocating machinery using vibration analysis. The basics and underlying physics of vibration signals are first examined. The acquisition and processing of signals is then reviewed followed by a discussion of machinery fault diagnosis using vibration analysis. Hereafter the important issue of rectifying faults that have been identified using vibration analysis is covered. The book also covers the other techniques of predictive maintenance such as oil and particle analysis, ultrasound and infrared thermography. The latest approaches and equipment used together with the latest techniques in vibration analysis emerging from current research are also highlighted. Understand the basics of vibration measurement Apply vibration analysis for different machinery faults Diagnose machinery-related problems with vibration analysis techniques

Vibration and Wear in High Speed Rotating Machinery

Vibration and Wear in High Speed Rotating Machinery
Author: Júlio M. Montalvão e Silva
Publisher: Springer Science & Business Media
Total Pages: 830
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 940091914X

Proceedings of the NATO Advanced Study Institute on Vibration and Wear Damage in High Speed Rotating Machinery, Tróia, Sebútal, April 10-22, 1989

Vibrations of Rotating Machinery

Vibrations of Rotating Machinery
Author: Osami Matsushita
Publisher: Springer
Total Pages: 573
Release: 2019-06-04
Genre: Technology & Engineering
ISBN: 9784431554523

Building on the previous volume “Vibrations of Rotating Machinery - Volume 1. Basic Rotordynamics: Introduction to Practical Vibration Analysis,” this book is intended for all practical designers and maintenance experts who are responsible for the reliable manufacturing and operation of rotating machinery. It opens with the dynamics of oil film bearings and their influences on unbalance, vibration resonance and the stability of rotor whirl motion. Subsequently, the book introduces readers to vibration diagnosis techniques for traditional ball bearings and active vibration control from magnetic bearings. Case studies on vibration problems and troubleshooting in industrial turbo machines are then presented and explained, showing rotor designers how to eliminate instability and modify resonance characteristics. Torsional vibration and other coupled vibration phenomena are discussed, and vibration measurement techniques and related signal processing procedures for vibration diagnosis are provided. Our latest three topics are included, covering: (a) the importance of the modeling order reduction (MOR) technique; (b) the approximate evaluation for oil-wheel/whip instability; and (c) a systematic method for shafting-blading coupled vibration analyses. In closing, a 100-question trial test is supplied as an example of the certification of vibration experts based on the ISO standard.