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El. knyga: Fundamentals of Engineering Tribology with Applications

(Indian Institute of Technology, Delhi)
  • Formatas: PDF+DRM
  • Išleidimo metai: 11-Mar-2016
  • Leidėjas: Cambridge University Press
  • Kalba: eng
  • ISBN-13: 9781316675458
Kitos knygos pagal šią temą:
Fundamentals of Engineering Tribology with ApplicationsDidesnis paveikslėlis
  • Formatas: PDF+DRM
  • Išleidimo metai: 11-Mar-2016
  • Leidėjas: Cambridge University Press
  • Kalba: eng
  • ISBN-13: 9781316675458
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Tribology is related to friction, wear and lubrication of machine elements. Tribology not only deals with the design of fluid containment systems like seals and gasket but also with the lubrication of surfaces in relative motion. This book comprehensively discusses the theories and applications of hydrodynamic thrust bearing, gas (air) lubricated bearing and elasto-hydrodynamic lubrication. It elucidates the concepts related to friction, including coefficient of friction, friction instability and stick-slip motion. It clarifies the misconception that harder and cleaner surfaces produce better results in wear. Recent developments, including online condition monitoring (an integration of moisture sensor, wear debris and oil quality sensors) and multigrid technique, are discussed in detail. The book also offers design problems and their real-life applications for cams, followers, gears and bearings. MATLAB programs, frequently asked questions and multiple choice questions are interspersed throughout for easy understanding of the topics.

Daugiau informacijos

This book offers detailed treatment of the fundamental concepts of tribology and its related applications. It will be useful to both senior undergraduate and graduate students.
List of Figures xii
List of Tables xxi
Preface xxiii
Acknowledgments xxiv
Nomenclature xxv
1 Introduction 1(51)
1.1 Defining Tribology
1(3)
1.1.1 What is tribology?
1(1)
1.1.2 Need of tribology as a separate subject
1(2)
1.1.3 History of Tribology
3(1)
1.2 Tribology in Design
4(6)
1.2.1 Mechanical design of seal and gasket
4(5)
1.2.2 Tribological design of seals and gasket
9(1)
1.3 Tribology in Industry (Maintenance)
10(3)
1.3.1 Example: seal
10(1)
1.3.2 Example: cam
11(1)
1.3.3 Example: journal bearings
11(1)
1.3.4 Example: magnetic bearing
12(1)
1.3.5 Example: multi-row roller bearing
12(1)
1.3.6 Example: gear
13(1)
1.4 Defining Lubrication
13(4)
1.4.1 Examples
13(1)
1.4.2 Applications of lubricant
14(1)
1.4.3 What is expected from a lubricant?
15(2)
1.5 Basic Modes of Lubrication
17(1)
1.5.1 Thick and thin lubrications
17(1)
1.5.2 Lubrication mechanisms
17(1)
1.6 Properties of Lubricants
18(1)
1.7 Types of Lubricants
19(15)
1.7.1 Solid lubricants
20(6)
1.7.2 Semi-solid lubricant
26(3)
1.7.3 Liquid lubricants
29(5)
1.7.4 Gaseous lubricants
34(1)
1.8 Lubricant Additives
34(4)
1.8.1 Need of Additives
34(1)
1.8.2 Types of additives
35(3)
1.8.3 Interference between additives
38(1)
1.9 Lubrication Selection
38(1)
1.10 Defining Bearing Terminology
39(4)
1.10.1 Comparison between sliding and rolling contact bearings
40(1)
1.10.2 Rolling contact bearings
40(1)
1.10.3 Sliding contact bearings
41(2)
Frequently Asked Questions
43(4)
Multiple Choice Questions
47(3)
Answers
50(1)
References
51(1)
2 Friction, Wear and Boundary Lubrication 52(68)
2.1 Friction
52(5)
2.1.1 Classification of friction
53(1)
2.1.2 Laws of friction
54(2)
2.1.3 Causes of dry friction
56(1)
2.2 Theories of Dry Friction
57(8)
2.3 Friction Measurement
65(3)
2.4 Stick—Slip Motion and Friction Instabilities
68(4)
2.5 Wear
72(27)
2.5.1 Classification of wear
74(24)
2.5.2 Factors affecting wear
98(1)
2.6 Theories of Wear
99(3)
2.7 Approaches to Friction Control and Wear Prevention
102(1)
2.8 Boundary Lubrication
103(7)
Frequently Asked Questions
110(5)
Multiple Choice Questions
115(3)
Answers
118(1)
References
118(2)
3 Lubrication of Bearings 120(67)
3.1 Mechanics of Fluid Flow
121(13)
3.1.1 Theory of hydrodynamic lubrication
122(2)
3.1.2 Lubricant Viscosity
124(8)
3.1.3 Mechanism of pressure development in lubricant film
132(2)
3.2 Reynolds' Equation and its Limitations
134(4)
3.3 Idealized Bearings
138(15)
3.3.1 Infinitely long plane fixed sliders
138(5)
3.3.2 Infinitely long plane pivoted sliders
143(1)
3.3.3 Infinitely long journal bearings
144(7)
3.3.4 Infinitely short journal bearings
151(2)
3.4 Journal Bearings
153(25)
3.4.1 Locating journal position
156(1)
3.4.2 Lubricant supply in bearing
156(2)
3.4.3 Design of journal bearings
158(20)
Frequently Asked Questions
178(2)
Multiple Choice Questions
180(3)
Answers
183(1)
References
183(1)
Program Listing in MATLAB for Problem 3
184(3)
4 Hydrodynamic Thrust Bearing 187(22)
4.1 Introduction
187(1)
4.2 Pressure Distribution
188(13)
4.2.1 Fixed pad thrust bearing
198(2)
4.2.2 Tilting pad thrust bearing
200(1)
4.3 Load
201(1)
4.4 Centre of Pressure
201(1)
4.5 Friction
202(1)
Frequently Asked Questions
203(4)
Multiple Choice Questions
207(1)
Answers
208(1)
References
208(1)
5 Hydrostatic and Squeeze Film Lubrication 209(52)
5.1 Hydrostatic Lubrication
209(18)
5.1.1 Basic concept
209(1)
5.1.2 Advantages and limitations
210(1)
5.1.3 Viscous flow through rectangular slot
210(3)
5.1.4 Types and configurations
213(2)
5.1.5 Circular step thrust bearing
215(4)
5.1.6 Rectangular thrust bearing
219(3)
5.1.7 Hydrostatic journal bearing
222(4)
5.1.8 Energy losses
226(1)
5.2 Squeeze Film Lubrication
227(10)
5.2.1 Basic concept
228(1)
5.2.2 Squeeze action between circular flat plates
229(2)
5.2.3 Squeeze action between rectangular plates
231(1)
5.2.4 Squeeze action under variable and alternating loads
232(2)
5.2.5 Application to journal bearings
234(3)
5.3 Engine Bearing Lubrication
237(11)
5.3.1 Oil flow
240(1)
5.3.2 Power loss
241(1)
5.3.3 Temperature rise
241(1)
5.3.4 Design procedure
241(2)
5.3.5 Case studies
243(5)
Frequently Asked Questions
248(8)
Multiple Choice Questions
256(3)
Answers
259(1)
References
259(2)
6 Elasto—Hydrodynamic Lubrication 261(36)
6.1 Principles and Applications
261(2)
6.2 Hertz Theory
263(6)
6.3 Pressure—Viscosity Term in Reynolds' Equation
269(5)
6.4 Ertel—Grubin Equation
274(4)
6.5 Numerical Method for Determining Oil Film Thickness in Elasto-Hydrodynamic Lubrication
278(3)
6.6 Rolling Element Bearings
281(3)
6.7 EHL of Gear—Teeth Contact
284(4)
Frequently Asked Questions
288(2)
References
290(1)
Program Listing in MATLAB for Figure 6.3.2-6.3.4
290(3)
Program Listing in MATLAB for Figure 6.5.2-6.5.3
293(4)
7 Gas (Air) Lubricated Bearings 297(29)
7.1 Introduction
297(3)
7.2 Merits, Demerits and Applications
300(1)
7.3 Aerodynamic Bearings
301(8)
7.3.1 Pad bearings
301(5)
7.3.2 Cylindrical bearings
306(1)
7.3.3 Magnetic recording discs with flying head
307(2)
7.4 Aerostatic Bearings
309(10)
7.4.1 Flow through restrictors
311(2)
7.4.2 Radial aerostatic bearings
313(3)
7.4.3 Thrust aerostatic bearings
316(3)
Frequently Asked Questions
319(2)
Multiple Choice Questions
321(2)
Answers
323(1)
References
323(1)
Program Listing in MATLAB for Figure 7.3.7
324(2)
8 Mixed Lubrication 326(45)
8.1 Introduction
326(4)
8.2 Surface Topography
330(7)
8.3 Characterization of Surface
337(1)
8.4 Boundary Lubrication
338(12)
8.5 Effect of Surface Topography on Mixed Lubrication
350(1)
8.6 Asperity Temperatures in Mixed Film Lubrication
350(1)
8.7 Tribological Performance of Bearing Operating in Mixed Lubrication Regime
351(6)
Frequently Asked Questions
357(1)
Multiple Choice Questions
358(2)
Answers
360(1)
References
360(1)
Program Listing in MATLAB for Figure 8.39
361(10)
9 Tribological Aspects of Rolling Motion 371(29)
9.1 Rolling Element Bearings
371(21)
9.1.1 Bearing terminology
371(3)
9.1.2 Classification of rolling bearings
374(2)
9.1.3 Load capacity
376(6)
9.1.4 Standardization
382(1)
9.1.5 Tribology of rolling bearings
383(3)
9.1.6 Case study: failure analysis of four row cylindrical roller bearing
386(6)
9.2 The Mechanics of Tyre—Road Interactions
392(2)
Frequently Asked Questions
394(2)
Multiple Choice Questions
396(2)
Answers
398(1)
References
398(2)
10 Tribological Aspects of Gears 400(29)
10.1 Spur Gears
401(1)
10.2 Friction and Wear of Spur Gears
401(6)
10.3 Contact Stresses
407(3)
10.4 Lubrication of Spur Gears
410(2)
10.5 Surface Failures
412(1)
10.6 Offline Monitoring of Gears
412(6)
10.6.1 Offline condition monitoring — a case study
415(3)
10.7 Online Monitoring of Gears
418(3)
10.7.1 Online condition monitoring — a case study
419(2)
Frequently Asked Questions
421(4)
Multiple Choice Questions
425(1)
Answers
426(1)
References
427(2)
Index 429
Harish Hirani received his PhD from the Indian Institute of Technology, Delhi. He was a visiting researcher at Massachusetts Institute of Technology, USA, from 2003 to 2004. He has published nearly 35 papers in national and international journals. His areas of interest are semi-active magneto rheological bearing, rolling element bearing, hydrodynamic bearing and seals.
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