氣體熱動力潤滑與密封

定　價：￥88.00

作　者：	白少先，溫詩鑄著
出版社：	清華大學出版社
叢編項：
標　簽：	暫缺

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ISBN：	9787302598336	出版時間：	2022-01-01	包裝：
開本：	16開	頁數(shù)：		字數(shù)：

內容簡介

　　本書全面系統(tǒng)的闡述了氣體潤滑與密封的理論和設計分析方法。內容包括：氣體狀態(tài)方程與基本性質、氣體潤滑方程、等溫氣體潤滑理論、剛性表面氣體熱潤滑理論、氣體密封熱彈流潤滑理論、端面密封氣體熱彈流動態(tài)特性、高壓氣體冷凝析水潤滑、密封實驗與設計方法。

作者簡介

　　白少先，男，1976年生，博士，浙江工業(yè)大學研究員、博士生導師。1998年7月畢業(yè)于山東輕工業(yè)學院機械設計與制造專業(yè)，獲學士學位；2001年7月畢業(yè)于太原理工大學機械設計及理論專業(yè)，獲碩士學位；2004年7月畢業(yè)于華南理工大學機械設計及理論專業(yè)，獲博士學位；2006年11月從清華大學機械工程博士后流動站出站，進入浙江工業(yè)大學工作；2011年9月至2012年2月，在美國賓夕法尼亞大學從事訪問學者研究?，F(xiàn)為中國機械工程學會高級會員，中國機械工程學會摩擦學分會青年工作委員會委員，氣體潤滑專業(yè)委員會副主任委員，入選浙江省151人才計劃第三層次、浙江省高校中青年學科帶頭人，獲浙江省自然科學杰出青年基金資助。主要從事高溫界面流體潤滑與發(fā)動機密封研究，重點在高溫流體潤滑理論、密封表面減磨耐磨新結構設計、密封表面精密加工技術、密封實驗測試技術、密封壽命預測與可靠性評定等方面開展工作。主持國家自然科學基金、浙江省自然科學基金、浙江省科技計劃項目、清華大學摩擦學國家重點實驗室開放基金項目、企業(yè)密封技術研發(fā)項目等10余項。發(fā)表SCI論文20余篇，獲授權國家發(fā)明專利8項。

圖書目錄

CHAPTER 1 Properties of gases.1
1.1 Gas equations 1
1.1.1 Ideal gas equations.. 2
1.1.2 Gas index equation.. 3
1.1.3 Actual gas equation. 5
1.1.4 Degree of gas molecular freedom .. 5
1.1.5 Specific heat capacity 7
1.2 Viscosity ..7
1.3 Property of wet gas .11
1.3.1 Pressure .. 12
1.3.2 Humidity. 13
1.3.3 Dew point temperature 14
References 14
CHAPTER 2 Gas lubrication equations. 15
2.1 Reynolds equation 15
2.1.1 Derivation of Reynolds equation.. 16
2.1.2 Reynolds equation in the polar coordinate system . 19
2.1.3 Reynolds equation in the cylindrical coordinate system.. 19
2.1.4 Lubrication parameters .. 20
2.2 Energy equation.22
2.2.1 Chang of gas inner energy 23
2.2.2 External work on gas and energy loss 24
2.3 Solid heat conduction equation and the interface equation ..26
2.4 Numerical analysis method.27
2.4.1 Finite difference method 27
2.4.2 Flow conservation. 28
2.4.3 Friction force balance . 34
References 35
CHAPTER 3 Isothermal gas lubrication .. 37
3.1 Sliders .37
3.1.1 Lubrication equation 38
3.1.2 Pressure boundary condition 40
3.1.3 Lubrication performance parameters.. 40
VI Contents
3.2
3.3
CHAPTER 4
4.1
4.2
4.3
4.4
3.1.4 Hydrodynamic lubrication characteristics of sliders.. 41
3.1.5 Hydrodynamic lubrication characteristics of divergent sliders .. 43
3.1.6 Lubrication characteristics of the magnetic head slider . 45 Journal bearing and radial seal .51
3.2.1 Lubrication equations.. 52
3.2.2 Boundary conditions 52
3.2.3 Lubrication parameters .. 53
3.2.4 Lubrication characteristics 55
Spiral groove thrust bearing56
3.3.1 Gas lubrication equations.. 59
3.3.2 Pressure boundary conditions . 60
3.3.3 Lubrication parameters .. 60
3.3.4 Lubrication characteristics 61
3.3.5 Spiral groove face seal 64
3.3.6 Lubrication equations.. 65
3.3.7 Pressure boundary conditions . 65
3.3.8 Seal performance parameters.. 66
3.3.9 Lubrication regularity . 66
References 71
Gas thermohydrodynamic lubrication of rigid surfaces.. 73 Sliders .73
4.1.1 Gas lubrication equations.. 73
4.1.2 Boundary conditions 75
4.1.3 Thermal lubrication characteristics . 75
Journal bearing and radial seal .79
4.2.1 Lubrication equations.. 79
4.2.2 Thermal boundary condition 80
4.2.3 Lubrication property 80
Spiral groove thrust bearing83
4.3.1 Lubrication equations.. 83
4.3.2 Boundary conditions 85
4.3.3 Lubrication property 86
Spiral groove face seal..86
4.4.1 Temperature characteristics of gas film 91
4.4.2 Lubrication property 94
References 99
Contents VII
CHAPTER 5 Gas thermoelastohydrodynamic lubrication of face seals . 101
5.1 Fundamental equations101
5.1.1 Lubrication equations 101
5.1.2 Boundary conditions . 104
5.2 Choked fluid effect107
5.2.1 Model validation . 107
5.2.2 Pressure distribution characteristics . 109
5.3 Characteristics of thermoelastic distortions of seal faces..109
5.4 Characteristics of gas thermoelastohydrodynamic lubrication..111
5.4.1 Mechanical distortions . 111
5.4.2 Thermal distortions 115
5.4.3 Thermoelastic distortions 117
References. 120
CHAPTER 6 Transient thermoelastohydrodynamic gas lubrication of face seals 121
6.1 Fundamental equations121
6.1.1 Dynamic equations. 122
6.1.2 Lubrication equations 122
6.1.3 Boundary conditions . 123
6.1.4 Dynamic characteristic parameter . 123
6.2 Dynamic characteristics of isothermal gas lubrication .124
6.2.1 Axial stiffness and damping . 124
6.2.2 Angular stiffness and damping 126
6.2.3 Amplitude-frequency characteristics of gas film .. 129
6.3 Dynamic characteristics of thermal gas lubrication of rigid surfaces 130
6.3.1 Axial stiffness and damping . 131
6.3.2 Angular stiffness and damping 134
6.3.3 Amplitude-frequency characteristics of gas film .. 137
6.4 Dynamic characteristics of gas thermoelastohydrodynamic lubrication..137
6.4.1 Axial stiffness and damping . 137
6.4.2 Angular stiffness and damping of gas film .. 139
6.4.3 Amplitude-frequency characteristics of gas film. 140 References. 141
VIII Contents
CHAPTER 7 Vapor-condensed gas lubrication of face seals .. 143
7.1 Fundamental equations143
7.1.1 Wet gas equations .. 143
7.1.2 Vapor-condensed parameter . 145
7.2 Characteristics of vapor condensation in gas lubrication film 145
7.3 Laws of vapor condensation in gas lubrication film..146
7.3.1 Humidity.. 146
7.3.2 Seal clearance 147
7.3.3 Seal pressure . 148
7.3.4 Rotational speed.. 148
7.4 Movement of liquid drops on gas lubrication surfaces.150
7.4.1 Surface wetting model . 150
7.4.2 Surface-texture geometry parameters and wettability 152
7.4.3 Droplet motion . 158
7.4.4 Drop adsorption on seal surface . 164
References. 164
CHAPTER 8 Cryogenic gas lubrication of face seals 167
8.1 Fundamental equations167
8.1.1 Lubrication equations 168
8.1.2 Boundary conditions . 171
8.2 Phase change in gas lubrication film..172
8.3 Characteristics of thermoelastic distortions of seal faces 173
8.4 Characteristics of cryogenic gas lubrication173
8.4.1 Ambient temperature 174
8.4.2 Rotation speed.. 174
References. 177
CHAPTER 9 Surface grooves of gas face seals and testing technology.. 179
9.1 Surface grooves of gas face seals .179
9.2 Testing technology of gas face seals ..185
9.2.1 Experimental setup. 185
9.2.2 Face groove machining 185
9.2.3 Face morphology test 187
9.3 Experimental characteristics of gas face seals ..188
9.3.1 Seal opening characteristic 188
9.3.2 Hydrodynamic characteristics.. 190
Contents IX
9.3.3 Surface wear.. 192
References. 195
CHAPTER 10 Design of gas face seals 197
10.1 Force analysis of gas seals197
10.1.1 Opening force. 198
10.1.2 Closing force.. 198
10.1.3 O-ring friction force 199
10.2 Geometric parameters of gas face seals 199
10.2.1 Seal clearance. 199
10.2.2 Seal face width.. 199
10.2.3 Balance diameter.. 200
10.2.4 Seal face and shaft (shaft sleeve) clearance.. 200
10.3 Performance parameters of gas face seals201
10.3.1 Leakage rate 201
10.3.2 Gas film stiffness . 201
10.4 Materials of the seal couple .202
10.5 Dimension design of seal rings..202
10.5.1 Design of rotor dimension .. 202
10.5.2 Design of stator dimension . 203
10.5.3 Design of the face groove 204
10.6 Design of the secondary seal ..205
10.7 Process of seal design and illustration205
10.7.1 Process of seal design 205
10.7.2 Design conditions. 206
10.7.3 Design steps 206
References. 218
Index .219