Design, Modeling and Reliability in Rotating Machinery (eBook, PDF)

Redaktion: Perez, Robert X.

• Format: PDF

Produktbeschreibung

Design, Modeling, and Reliability in ROTATING MACHINERY This broad collection of current rotating machinery topics, written by industry experts, is a must-have for rotating equipment engineers, maintenance personnel, students, and anyone else wanting to stay abreast with current rotating machinery concepts and technology. Rotating machinery represents a broad category of equipment, which includes pumps, compressors, fans, gas turbines, electric motors, internal combustion engines, and other equipment, that are critical to the efficient operation of process facilities around the world. These machines must be designed to move gases and liquids safely, reliably, and in an environmentally friendly manner. To fully understand rotating machinery, owners must be familiar with their associated technologies, such as machine design, lubrication, fluid dynamics, thermodynamics, rotordynamics, vibration analysis, condition monitoring, maintenance practices, reliability theory, and other topics. The goal of the "Advances in Rotating Machinery" book series is to provide industry practitioners a time-savings means of learning about the most up-to-date rotating machinery ideas and best practices. This three-book series will cover industry-relevant topics, such as design assessments, modeling, reliability improvements, maintenance methods and best practices, reliability audits, data collection, data analysis, condition monitoring, and more. This first volume begins the series by focusing on rotating machinery design assessments, modeling and analysis, and reliability improvement ideas. This broad collection of current rotating machinery topics, written by industry experts, is a must-have for rotating equipment engineers, maintenance personnel, students, and anyone else wanting to stay abreast with current rotating machinery concepts and technology. Design, Modeling, and Reliability in Rotating Machinery covers, among many other topics: * Rotordynamics and torsional vibration modeling * Hydrodynamic bearing design theory and current practices * Centrifugal and reciprocating compressor design and analysis * Centrifugal pump design, selection, and monitoring * General purpose steam turbine sizing

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 384
• Erscheinungstermin: 5. Januar 2022
• Englisch
• ISBN-13: 9781119631705
• Artikelnr.: 63298892

Autorenporträt

Robert Perez is a mechanical engineer with more than 40 years of rotating equipment experience in the petrochemical industry. He has worked in petroleum refineries, chemical facilities, and gas processing plants. He earned a BSME degree from Texas A&M University at College Station, an MSME degree from the University of Texas at Austin and holds a Texas PE license. Mr. Perez has written numerous technical articles for magazines and conferences proceedings and has authored five books and coauthored four books covering machinery reliability, including several books also available from Wiley-Scrivener.

Inhaltsangabe

Preface xiii

Acknowledgements xv

Part 1: Design and Analysis 1

1 Rotordynamic Analysis 3
By William D. Marscher

Introduction 3

Rotor Vibration - General Physical Concepts 4

Rotor Vibration - Mathematical Description 6

Natural Frequencies and Resonance 6

Critical Speed Analysis 10

Phase Angle, and Its Relationship to Natural Frequency 15

Gyroscopic Effects 16

Accounting for Bearings 18

Cross-Coupling Versus Damping and "Log Dec" 20

Annular Seal "Lomakin Effect" 21

Fluid "Added Mass" 23

Casing and Foundation Effects 24

Lateral Vibration Analysis Methods for Turbomachinery and Pump Rotor Systems 25

Manual Methods Single Stage 25

Computer Methods 26

Forced Response Analysis 30

Mechanical Excitation Forces 32

Balance 32

Fluid Excitation Forces 37

Impeller Reaction Forces 37

Impeller Active Forces 38

Rotordynamic Stability 43

Subsynchronous Whirl & Whip 43

Stabilizing Component Modifications 47

Vertical Turbine Pump Rotor Evaluation 48

Conclusions 51

Nomenclature 52

Acknowledgements 53

References 53

2 Torsional Analysis 57
By William D. Marscher

Introduction 58

General Concerns in the Torsional Vibration Analysis of Pump and Turbomachinery Rotor Assemblies 58

Predicting Torsional Natural Frequencies 59

Torsional Excitations 63

Torsional Forced Response 68

Case History 72

Conclusions 73

Nomenclature 79

Acknowledgements 79

References 80

3 Hydrodynamic Bearings 83
By John K. Whalen

API Mechanical Equipment Standards for Refinery Service 83

Bearings 84

Hydrodynamic Lubrication 85

Tower's Experiments 86

Reynolds Equation 88

Stribeck Curve 93

Journal Bearings 94

Dynamic Coefficients 101

Tilting Pad Journal Bearings 103

Pivot Types 107

Lubrication Methods 117

Thrust Bearings 120

A Note on Thrust Bearing Diameters 122

Fixed Geometry Thrust Bearings 122

Pivot Types 127

Lubrication 127

Increasing Load Capacity 130

Babbitt 131

Polymer-Lined Bearings 132

Current and Future Work 134

References 135

4 Understanding Rotating Machinery Data Trends and Correlations 139
By Robert X. Perez

Pattern Recognition 139

Static Versus Dynamic Data 141

Trends 142

Flat Trends 142

Trends with Step Changes 144

Upward and Downward Trends 146

Cyclic Trends 148

Is It the Machine or the Process? 148

Correlations 149

"Correlation Does Not Imply Causation" 151

Combination Trends 154

Exponential Growth Trends 155

Erratic Trends 160

Induced Draft Fan Experiences Unpredictable Vibration 160

Erratic Vibration Related to Rotor Instability 161

Some Rules of Thumb 162

5 An Introduction to Sizing General Purpose Steam Turbines 165
By Robert X. Perez and David W. Lawhon

Why Do We Use Steam Turbines? 165

How Steam Turbines Work 165

Steam Generation 167

Waste Heat Utilization 168

The Rankine Cycle 169

General Purpose Steam Turbine Sizing 170

General Purpose, Back Pressure, Steam Turbines 170

Single Stage B