Dowson / Higginson / Hopkins Elasto-Hydrodynamic Lubrication

International Series on Materials Science and Technology
1. Auflage 2014
ISBN: 978-1-4831-8189-9
Verlag: Elsevier Science & Techn.
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, Band Volume 23, 250 Seiten, Web PDF

Reihe: International Series on Materials Science and Technology

Elasto-Hydrodynamic Lubrication deals with the mechanism of elasto-hydrodynamic lubrication, that is, the lubrication regime in operation over the small areas where machine components are in nominal point or line contact. The lubrication of rigid contacts is discussed, along with the effects of high pressure on the lubricant and bounding solids. The governing equations for the solution of elasto-hydrodynamic problems are presented. Comprised of 13 chapters, this volume begins with an overview of elasto-hydrodynamic lubrication and representation of contacts by cylinders, followed by a discussion on equations relevant to lubrication, including the Reynolds equation. The reader is then introduced to lubrication of rigid cylinders; the importance of film thickness in highly loaded rigid contacts; the elasticity of solids in contact; and the theory of elasto-hydrodynamic lubrication. Subsequent chapters focus on apparatus and measurements of film thickness and film shape; friction and viscosity; and lubrication of gears and roller bearings. This book will be of interest to tribologists.

Autoren/Hrsg.

Dowson, D.

Higginson, G. R.

Hopkins, D. W.

Inhaltsverzeichnis

1;Front Cover;1
2;Elasto-Hydrodynamic Lubrication;4
3;Copyright Page;5
4;Table of Contents;6
5;PREFACE TO SECOND EDITION;8
6;PREFACE TO FIRST EDITION;10
7;NOTATION;12
8;CHAPTER 1. INTRODUCTION;16
8.1;Representation of Contacts by Cylinders;29
9;CHAPTER 2. LUBRICATION EQUATIONS;35
9.1;The Reynolds Equation;35
9.2;The Energy Equation;43
10;CHAPTER 3. LUBRICATION OF RIGID CYLINDERS;45
10.1;Solution of the Reynolds Equation for a Rigid Circular Cylinder and Plane;46
10.2;Solution of the Reynolds Equation for a Rigid Parabolic Cylinder and Plane;58
11;CHAPTER 4. FILM THICKNESS IN HIGHLY LOADED RIGID CONTACTS;60
12;CHAPTER 5.
ELASTICITY;72
12.1;The Displacements;74
12.2;The Stresses;77
13;CHAPTER 6. ELASTO-HYDRODYNAMIC THEORY;80
13.1;Grubin's Theory;85
13.2;A Numerical Solution;87
14;CHAPTER 7. THEORETICAL RESULTS;93
14.1;Speed Effects;100
14.2;Effects of Lubricant Compressibility;103
14.3;Summary of Theoretical Results;110
14.4;Formula for Film Thickness;111
14.5;A Note About Thermal Effects;117
15;CHAPTER 8. EXPERIMENTAL BACKGROUND;121
15.1;Oil Film Shape;133
15.2;Coefficient of Friction;135
15.3;Pressure Distribution;141
16;CHAPTER 9. APPARATUS AND MEASUREMENTS OF FILM THICKNESS AND FILM SHAPE;156
16.1;Apparatus;156
16.2;Details of Electrical Measurements;160
16.3;Measurement of Film Thickness Using Pads;162
16.4;Measurement of the Shape of the Gap;167
16.5;Comparison of Results Obtained by Different Methods;172
16.6;The Controlling Viscosity;173
16.7;Experimental Values of the Film Thickness;175
17;CHAPTER 10. FRICTION AND VISCOSITY;180
17.1;Theory;180
17.2;The Heat Balance;182
17.3;Sliding Friction and Effective Viscosity;185
17.4;The Rolling Friction;187
17.5;Experimental Results and Their Comparison With Theory. High Speeds of Sliding;187
17.6;Rolling Friction and Results of Low Speeds of Sliding;193
18;CHAPTER 11. COMPARISON OF THEORY AND EXPERIMENT;201
18.1;Film Thickness and Shape;203
18.2;A Simplified Formula for Film Thickness;209
19;CHAPTER 12. ANALYSIS OF ROLLER BEARINGS;212
19.1;Roller Bearing kinematics for Dry Contact;213
19.2;Lubrication Analysis for a Constant Viscosity Lubricant and Rigid Bearing Components;214
19.3;Elastic Deformation of a Roller Bearing Assembly;220
19.4;Elasto-hydrodynamic Force Components;226
19.5;Roller Bearing Lubrication Analysis for Pressure Dependent Viscosity and Elastic Bearing Components;229
20;CHAPTER 13. A NOTE ON GEAR LUBRICATION;235
21;REFERENCES;243
22;AUTHOR INDEX;250
23;SUBJECT INDEX;252