Kinematics and Mechanisms 2008 Part 7 docx

... Elements 22.1 Threaded Fasteners 22.2 Clutches and Brakes Rim-Type Clutches and Brakes • Axial-Type Clutches and Brakes • Disk Clutches and Brakes • Cone Clutches and Brakes • Positive-Contact Clutches Gordon ... fibers to provide strength and ability to withstand high temperatures; various friction particles to obtain a degree of wear resistance and higher coefficient of fricti...

Ngày tải lên: 12/08/2014, 03:20

... macrotribology and micro/nanotribology and their significance. We then describe mechanisms of friction, wear, and lubrication, followed by micro/nanotribology. 21.1 History of Tribology and Its Significance ... Micro- and nanotribological techniques are ideal to study the friction and wear processes of micro- and nanostructures. Although micro/nanotribological studies are crit...

Ngày tải lên: 12/08/2014, 03:20

... 1.0 1.0 1.0 1.0 2  0.8 67 0.88 0.905 0.9 37 0. 97 0.99 1 0.605 0 .72 0 .74 5 0 .79 0.843 0.91 0.958 0.5 0.33 0.50 0.56 0.635 0 .73 2 0.84 0.908 0.3 0. 17 0.30 0.355 0.435 0.551 0 .70 5 0.81 0.1  0.105 0.115 ... pressure of the lubricant at µ = 0 in Fig. 23 .7, and µ 1 is the angle at which the oil film pressure is a maximum. Brief derivations of the Reynolds equation and the Harris...

Ngày tải lên: 12/08/2014, 03:20

... Elements 22.1 Threaded Fasteners 22.2 Clutches and Brakes Rim-Type Clutches and Brakes • Axial-Type Clutches and Brakes • Disk Clutches and Brakes • Cone Clutches and Brakes • Positive-Contact Clutches Gordon ... fibers to provide strength and ability to withstand high temperatures; various friction particles to obtain a degree of wear resistance and higher coefficient of fricti...

Ngày tải lên: 11/08/2014, 10:22

... nickel 0 .78 0.56 Copper on glass 0.68 0.53 Cast iron on cast iron 1.10 0.15 0. 070 (d) 0.064(n) Bronze on cast iron 0.22 0. 077 (n) Oak on oak (parallel to grain) 0.62 0.48 0.164(r) 0.0 67( s) Oak ... humidity, normal pressure, and sliding velocity). Many materials show sliding speed and normal load dependence on the coefficients of static and kinetic friction in dry and lubricated c...

Ngày tải lên: 12/08/2014, 03:20

... impact, and repeated impact leads to pitting and erosive wear. Caviation erosion arises when a solid and fluid are in relative motion and bubbles formed in the fluid become unstable and implode ... adhesive- and abrasive-wear mechanisms. Of the aforementioned wear mechanisms, one or more may be operating in one particular machinery. In many cases wear is initiated by one mechan...

Ngày tải lên: 12/08/2014, 03:20

... (Lond.) 177 :1 57 −234. Ruan, J. and Bhushan, B. 1994. Atomic-scale and microscale friction of graphite and diamond using friction force microscopy. J. Appl. Phys. 76 :5022 −5035. Tabor, D. and Winterton, ... 62:463 − 473 . Petroff, N. P. 1883. Friction in machines and the effects of the lubricant. Eng. J. (in Russian; St. Petersburg) 71 −140, 228− 279 , 377 −436, 535−564. Rabi...

Ngày tải lên: 12/08/2014, 03:20

... Machine Design. 37( 23): 128−131. Gagne, A. F., Jr. 1953. Torque capacity and design of cone and disk clutches. Product Eng. 24(12): 182−1 87. Ito, Y., Toyoda, J., and Nagata, S. 1 977 . Interface pressure ... 1 973 . Tribology Handbook. John Wiley & Sons, New York. Osgood, C. C. 1 979 . Saving weight in bolted joints. Machine Design, vol. 51, no. 24, 25 October 1 979 , pp. 128−133...

Ngày tải lên: 12/08/2014, 03:20

... In high-speed pumps and compressors, bushing seals interact with the shaft and bearing system dynamically. Bushing seals can utilize complex shapes and patterns of the shaft and seal surfaces to ... suspension of iron particles in a special liquid) within the magnetic flux field, as shown. The fluid creates a continuous bridge between the rotating and nonrotating parts at all times...

Ngày tải lên: 12/08/2014, 03:20

... nitrile rubber is most common and suitable for oils and aqueous solutions, fluorocarbon is excellent for hot oils. Many of the elastomer materials are made into O-rings and find application in certain ... graphite/tungsten carbide 500 000 17: 5 ¢ 10 6 Carbon graphite/silicon carbide > 500 000 > 17: 5 ¢ 10 6 Friction or seal power can be estimated from P = p c A f f c V (24:9) whe...

Ngày tải lên: 12/08/2014, 03:20