Hydrodynamic Lubrication:9784431278986:Hori, Yukio:eCampus.com

1 Friction, Wear, and Lubrication

(8)

1.1 Friction, Wear, and Lubrication � Tribology

(1)

1.2 Various Forms of Lubrication

(5)

1.2.1 Solid Friction

(2)

1.2.2 Hydrodynamic Lubrication

(1)

1.3 Meanings of Tribology

(1)

References

(1)

2 Foundations of Hydrodynamic Lubrication

(14)

2.1 Tower's Experiment

(2)

2.2 Reynolds' Theory of Hydrodynamic Lubrication

(11)

2.2.1 Interpretation of Reynolds' Equation

(4)

References

(1)

3 Fundamentals of Journal Bearings

(24)

3.1 Circular Journal Bearings

(4)

3.1.1 Cross Section of a Bearing

(1)

3.1.2 Shape of the Oil Film

(1)

3.1.3 Bearing Length (Bearing Width)

(1)

3.1.4 Boundary Conditions for the Oil Film

(2)

3.2 Infinitely Long Bearings

(12)

3.2.1 Oil Film Pressure

(2)

3.2.2 Infinitely Long Bearing Under Sommerfeld's Condition

(6)

3.2.3 Infinitely Long Bearing Under G�mbel's Condition

(4)

3.3 Short Bearings

(2)

3.3.1 Oil Film Pressure

(1)

3.3.2 Characteristics of a Short Bearing Under G�mbel's Condition

(1)

3.4 Finite Length Bearings

(3)

References

(1)

4 Fundamentals of Thrust Bearings

(16)

4.1 Infinitely Long Plane Pad Bearings

(6)

4.1.1 Basic Formulae

(1)

4.1.2 Basic Characteristics

(5)

4.2 Finite Length Plane Pad Bearings

(1)

4.3 Sector Pad Bearings

(3)

4.3.1 Reynolds' Equation in Cylindrical Coordinates

(2)

4.3.2 Numerical Solution of a Sector Pad

(1)

4.4 Additional Topics

(2)

4.4.1 Influence of Deformation of the Pad

(1)

4.4.2 Magnetic Disk Memory Storage

(1)

References

(3)

5 Stability of a Rotating Shaft � Oil Whip

(56)

5.1 Oil Whip

(3)

5.2 Oil Whip Theory

(22)

5.2.1 Oil Film Pressure

(3)

5.2.2 Oil Film Force

(1)

5.2.3 Linearization of the Oil Film Force

(3)

5.2.4 Equations of Motion

(1)

5.2.5 Stability Limit

(8)

5.2.6 Occurrence of Oil Whip � Hysteresis

(4)

5.2.7 Coordinate Axes

(1)

5.3 Stability of Multibearing Systems

(3)

5.4 Influence of Earthquakes on Oil Whip

(6)

5.4.1 Basic Equations

(1)

5.4.2 Examples of Simulation

(3)

5.5 Limit Cycle in an Unstable Domain

(4)

5.5.1 Approximate Nonlinear Analysis of Journal Bearing Characteristics

(3)

5.5.2 Results of Analysis

101

(1)

5.6 Floating Bush Bearings

102

(4)

5.7 Three Circular Arc Bearings

106

(3)

5.8 Porous Bearings

109

(2)

5.8.1 Governing Equations

109

(1)

5.8.2 Stability of a Shaft System

110

(1)

5.9 Chaos in Rotor�Bearing Systems

111

(2)

5.10 Prevention of Oil Whip

113

(1)

References

114

(5)

6 Foil Bearings

119

(18)

6.1 Basic Equations

121

(1)

6.2 Finite Element Solution of the Basic Equations

122

(4)

6.2.1 Reynolds' Equation

122

(3)

6.2.2 Equation of Balance for the Foil

125

(1)

6.2.3 Solution Procedure

126

(1)

6.3 Characteristics of Foil Bearings

126

(4)

6.3.1 Single Cylinder Heads

127

(1)

6.3.2 Double Cylinder Heads

128

(2)

6.3.3 Comparison with Experiments

130

(1)

6.4 Additional Topics

130

(6)

6.4.1 Magnetic Tape Memory Storage

130

(1)

6.4.2 Foil Disk

131

(5)

References

136

(1)

7 Squeeze Film

137

(24)

7.1 Basic Equations

138

(3)

7.2 Squeeze Between Rigid Surfaces

141

(4)

7.2.1 Squeeze Without Fluid Inertia

141

(1)

7.2.2 Squeeze with Fluid Inertia

142

(2)

7.2.3 Sinusoidal Squeeze Motion

144

(1)

7.3 Sinusoidal Squeeze by a Rigid Surface (Experiments)

145

(4)

7.3.1 Mild Sinusoidal Squeeze

145

(1)

7.3.2 Intense Sinusoidal Squeeze Cavitation

146

(3)

7.4 Sinusoidal Squeeze with a Soft Surface

149

(10)

7.4.1 Low-Frequency Squeeze

150

(3)

7.4.2 High-Frequency Squeeze

153

(1)

7.4.3 Results of Experiment and Calculation

154

(5)

References

159

(2)

8 Heat Generation and Temperature Rise

161

(36)

8.1 Basic Equations for Thermohydcodynamic Lubrication

162

(1)

8.2 Generalized Reynolds' Equation

163

(3)

8.2.1 Balance of Forces

163

(1)

8.2.2 Flow Velocity

164

(1)

8.2.3 Continuity Equation

164

(1)

8.2.4 Generalized Reynolds' Equation

165

(1)

8.3 Energy Equation

166

(5)

8.3.1 General Energy Equation

166

(2)

8.3.2 Energy Equation

168

(2)

8.3.3 Transformation of the Energy Equation

170

(1)

8.4 Temperature Distribution in Bearings

171

(1)

8.5 Temperature Analyses of Tilting Pad Thrust Bearings-Sector Pads

172

(13)

8.5.1 Basic Equations

173

(2)

8.5.2 Boundary Condit ions

175

(1)

8.5.3 Numerical Analyses

175

(2)

8.5.4 Examples of Three-Dimensional Analyses of Temperature Distribution

177

(1)

8.5.5 Comparisons of Three-Dimensional, Two-Dimensional, and Isoviscous Analyses

178

(2)

8.5.6 Analysis Considering Inertia Forces

180

(4)

8.5.7 Comparison of Calculated Results and Experiments

184

(1)

8.6 Temperature Analyses of Circular Journal Bearings

185

(8)

8.6.1 Basic Equations

187

(1)

8.6.2 Boundary Conditions

187

(2)

8.6.3 Comparison of Calculated Results and Experiments

189

(4)

References

193

(4)

9 Turbulent Lubrication

197

(32)

9.1 Time-Average Equation of Motion and the Reynolds' Stress

198

(3)

9.2 Turbulent Flow Model

201

(3)

9.2.1 Mixing Length Model

201

(2)

9.2.2 k-epsilon Model

203

(1)

9.3 Turbulent Lubrication Theory Using the Mixing Length Model

204

(7)

9.3.1 Modified Mixing Length

204

(2)

9.3.2 Turbulent Velocity Distribution Between Two Surfaces

206

(2)

9.3.3 Turbulent Reynolds' Equation

208

(1)

9.3.4 Turbulent Coefficients of Fluid Film Seals

209

(2)

9.4 Comparison of Analyses Using the Mixing Length Model with Experiments

211

(3)

9.4.1 Turbulent Static Characteristics of Fluid Film Seals

211

(2)

9.4.2 Turbulent Dynamic Characteristics of Fluid Film Seals

213

(1)

9.5 Turbulent Lubrication Theory Using the k-s Model

214

(4)

9.5.1 Application of the k-epsilon Model to an Oil Film

215

(1)

9.5.2 Turbulent Reynolds' Equation

216

(2)

9.6 Comparison of Analyses Using the k-epsilon Model with Experiments

218

(4)

9.7 Reduction of Friction in a Turbulent Bearing by Toms' Effect

222

(2)

9.8 Taylor Vortices in a Journal Bearing

224

(2)

References

226

(3)

Index

229


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