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气体热动力润滑与密封(Gas Thermohydrodynamic Lubrication and Seals)

气体热动力润滑与密封(Gas Thermohydrodynamic Lubrication and Seals)

1星价 ¥55.4 (6.3折)
2星价¥55.4 定价¥88.0
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  • ISBN:9787302598336
  • 装帧:70g胶版纸
  • 册数:暂无
  • 重量:暂无
  • 开本:其他
  • 页数:236
  • 出版时间:2021-12-01
  • 条形码:9787302598336 ; 978-7-302-59833-6

本书特色

随着现代机械装备不断向高压、高速和高(低)温现等高参数化发展,高速气体轴承和高压气体密封设计中所面临的流固热等多场耦合、介质相变、高速流效应等气体润滑理论和设计方法问题日益突出。本书针对精密机电装备、石油、化工流程工业装备以及航空装备中典型气体轴承和密封结构形式,系统的阐述了气体润滑理论和分析方法,可作为高校机械工程等相关专业研究生教材,也可为相关领域的气体轴承和密封设计提供参考。 本书以高速气体轴承和高压气体密封的润滑设计为应用背景,系统阐述了多物理场耦合条件下的气体润滑理论和设计分析方法。

内容简介

本书全面系统的阐述了气体润滑与密封的理论和设计分析方法。内容包括:气体状态方程与基本性质、气体润滑方程、等温气体润滑理论、刚性表面气体热润滑理论、气体密封热弹流润滑理论、端面密封气体热弹流动态特性、高压气体冷凝析水润滑、密封实验与设计方法。

目录

Contents CHAPTER 1 Properties of gases 1 Gas equations 1 Ideal gas equations 2 Gas index equation 3 Actual gas equation 5 Degree of gas molecular freedom 5 Specific heat capacity 7 Viscosity 7 Property of wet gas 11 Pressure 12 Humidity. 13 Dew point temperature. 14 References 14 CHAPTER 2 Gas lubrication equations 15 Reynolds equation 15 Derivation of Reynolds equation 16 Reynolds equation in the polar coordinate system 19 Reynolds equation in the cylindrical coordinate system 19 Lubrication parameters 20 Energy equation 22 Chang of gas inner energy 23 External work on gas and energy loss 24 Solid heat conduction equation and the interface equation 26 Numerical analysis method 27 Finite difference method 27 Flow conservation 28 Friction force balance 34 References 35 CHAPTER 3 Isothermal gas lubrication 37 Sliders 37 Lubrication equation 38 Pressure boundary condition 40 Lubrication performance parameters 40 V VI Contents Hydrodynamic lubrication characteristics of sliders 41 Hydrodynamic lubrication characteristics of divergent sliders 43 Lubrication characteristics of the magnetic head slider 45 Journal bearing and radial seal 51 Lubrication equations 52 Boundary conditions 52 Lubrication parameters 53 Lubrication characteristics 55 Spiral groove thrust bearing 56 Gas lubrication equations. 59 Pressure boundary conditions 60 Lubrication parameters 60 Lubrication characteristics 61 Spiral groove face seal 64 Lubrication equations 65 Pressure boundary conditions 65 Seal performance parameters 66 Lubrication regularity 66 References 71 CHAPTER 4 Gas thermohydrodynamic lubrication of rigid surfaces 73 Sliders 73 Gas lubrication equations. 73 Boundary conditions 75 Thermal lubrication characteristics 75 Journal bearing and radial seal 79 Lubrication equations 79 Thermal boundary condition 80 Lubrication property 80 Spiral groove thrust bearing 83 Lubrication equations 83 Boundary conditions 85 Lubrication property 86 Spiral groove face seal 86 Temperature characteristics of gas film 91 Lubrication property 94 References 99 Contents _x00E_VII CHAPTER 5 Gas thermoelastohydrodynamic lubrication of face seals 101 Fundamental equations 101 Lubrication equations 101 Boundary conditions 104 Choked fluid effect 107 Model validation 107 Pressure distribution characteristics 109 Characteristics of thermoelastic distortions of seal faces 109 Characteristics of gas thermoelastohydrodynamic lubrication 111 Mechanical distortions 111 Thermal distortions 115 Thermoelastic distortions 117 References 120 CHAPTER 6 Transient thermoelastohydrodynamic gas lubrication of face seals 121 Fundamental equations 121 Dynamic equations 122 Lubrication equations 122 Boundary conditions 123 Dynamic characteristic parameter 123 Dynamic characteristics of isothermal gas lubrication 124 Axial stiffness and damping 124 Angular stiffness and damping 126 Amplitude-frequency characteristics of gas film 129 Dynamic characteristics of thermal gas lubrication of rigid surfaces 130 Axial stiffness and damping 131 Angular stiffness and damping 134 Amplitude-frequency characteristics of gas film 137 Dynamic characteristics of gas thermoelastohydrodynamic lubrication 137 Axial stiffness and damping 137 Angular stiffness and damping of gas film 139 Amplitude-frequency characteristics of gas film 140 References 141 VIII Contents CHAPTER 7 Vapor-condensed gas lubrication of face seals 143 Fundamental equations 143 Wet gas equations 143 Vapor-condensed parameter 145 Characteristics of vapor condensation in gas lubrication film 145 Laws of vapor condensation in gas lubrication film 146 Humidity 146 Seal clearance 147 Seal pressure 148 Rotational speed 148 Movement of liquid drops on gas lubrication surfaces 150 Surface wetting model 150 Surface-texture geometry parameters and wettability 152 Droplet motion 158 Drop adsorption on seal surface 164 References 164 CHAPTER 8 Cryogenic gas lubrication of face seals 167 Fundamental equations 167 Lubrication equations 168 Boundary conditions 171 Phase change in gas lubrication film 172 Characteristics of thermoelastic distortions of seal faces 173 Characteristics of cryogenic gas lubrication 173 Ambient temperature 174 Rotation speed 174 References 177 CHAPTER 9 Surface grooves of gas face seals and testing technology 179 Surface grooves of gas face seals 179 Testing technology of gas face seals 185 Experimental setup 185 Face groove machining 185 Face morphology test 187 Experimental characteristics of gas face seals 188 Seal opening characteristic 188 Hydrodynamic characteristics 190 Contents IX Surface wear 192 References 195 CHAPTER 10 Design of gas face seals 197 Force analysis of gas seals 197 Opening force 198 Closing force 198 O-ring friction force 199 Geometric parameters of gas face seals 199 Seal clearance 199 Seal face width 199 Balance diameter 200 Seal face and shaft (shaft sleeve) clearance 200 Performance parameters of gas face seals 201 Leakage rate 201 Gas film stiffness 201 Materials of the seal couple 202 Dimension design of seal rings 202 Design of rotor dimension 202 Design of stator dimension 203 Design of the face groove 204 Design of the secondary seal 205 Process of seal design and illustration 205 Process of seal design 205 Design conditions 206 Design steps 206 References 218 Index 219
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作者简介

白少先,男,1976年生,博士,浙江工业大学研究员、博士生导师。1998年7月毕业于山东轻工业学院机械设计与制造专业,获学士学位;2001年7月毕业于太原理工大学机械设计及理论专业,获硕士学位;2004年7月毕业于华南理工大学机械设计及理论专业,获博士学位;2006年11月从清华大学机械工程博士后流动站出站,进入浙江工业大学工作;2011年9月至2012年2月,在美国宾夕法尼亚大学从事访问学者研究。现为中国机械工程学会高级会员,中国机械工程学会摩擦学分会青年工作委员会委员,气体润滑专业委员会副主任委员,入选浙江省151人才计划第三层次、浙江省高校中青年学科带头人,获浙江省自然科学杰出青年基金资助。主要从事高温界面流体润滑与发动机密封研究,重点在高温流体润滑理论、密封表面减磨耐磨新结构设计、密封表面精密加工技术、密封实验测试技术、密封寿命预测与可靠性评定等方面开展工作。主持国家自然科学基金、浙江省自然科学基金、浙江省科技计划项目、清华大学摩擦学国家重点实验室开放基金项目、企业密封技术研发项目等10余项。发表SCI论文20余篇,获授权国家发明专利8项。

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