Tribology in Machine Design 2009 Part 5 pot

... /'=/ in a loose bearing, = 1 .57 /in a new well-fitted bearing, = 1.2 75 /in a well-worn bearing. 4.9.1. Axially loaded bearings Figure 4.28 shows a thrust block or pivot designed ... principle of uniform displacement outlined in case C. In other words, we have the case of a journal rotating in a bush under ideal conditions of wear. 108 Tribolog...

Ngày tải lên: 11/08/2014, 18:21

... be determined by examining the plasticity index, \\i. However, in the mixed lubrication regime in which /I is in the range 1.0-3.0, where most machine sliding contacts or sliding/rolling ... is particularly true in the case of the adhesive wear resulting from direct metal-metal asperity contacts. If lubricant molecules remain attached to 38 Tribology in...

Ngày tải lên: 11/08/2014, 18:21

... and wear in lower kinematic pairs 1 05 the fact that when a>0 the machine will not sustain the load when the effort is removed. Thus, referring to the inclined plane, ... reduced in the ratio 4. 75: 0.9 = 5. 23:1. In general, the following is approximately true: a machine will sustain its load, if the effort is removed, when its efficienc...

Ngày tải lên: 11/08/2014, 18:21

... bearings have been designed with a reduced 212 Tribology in machine design more serious situation exists for the self-acting gas bearings during the period of attaining nominal ... established in the following areas: (i) Machine tools. Use of gas lubrication in grinding spindles allows attainment of high speeds with minimal heat generation. Sliding-element b...

Ngày tải lên: 11/08/2014, 18:21

... speed. 250 Tribology in machine design during the rolling of the ball along the surface of the inner and outer races respectively, / ; , / 0 are the distances moved in unit ... of the principal radii of curvature of the bodies at the point of contact and K is a coefficient depending on the function F(p) defined as 238 Tribology in machine...

Ngày tải lên: 11/08/2014, 18:21

... 25 -0.0200 0.0144 25 35 -0.0187 0.0088 25 85 -0.0167 0.0161 12 35 -0.0402 0.0101 35 85 -0.0087 276 Tribology in machine design is formed between the surfaces in contact. The ... lubricant viscosity Pitch line velocity 1 2 .5 4.0 10 16 25 (ms' 1 ) Kinematic viscosity 180-3001 252 00100-16070100 50 80 40- 65 (cSt) Rolling-contact bearings 2 65 7 ....

Ngày tải lên: 11/08/2014, 18:21

... 15 Kinematics of rolling-contact bearing, Kinetic friction, 98 Kingsbury, 186 256 Labyrinth seals, 164 Lambda ratio, 26, 29, 260, 2 65, 281 Line contact, 242 L life, 7, 267 Load bearing ... sliding between involute gear teeth consists of sliding in one direction during approach, reducing to zero at the pitch point where the direction of sliding changes, and increa...

Ngày tải lên: 11/08/2014, 18:21

... NEW DELHI 2 Tribology in machine design the engineering task of mechanical engineers in general, and of machine designers in particular. The task of a mechanical engineer consists ... bearing 213 5. 8.3. Minimum oil film thickness 214 5. 9. Modern developments in journal bearing design 217 5. 9.1. Bearing fit 218 5. 9.2. Grooving 219 5. 9.3. Cleara...

Ngày tải lên: 22/03/2014, 13:20

... mechanical engineering in general. In any attempt to integrate tribology and tribodesign into mechanical engineering and machine design, it is advantageous to start by visualizing X ... machine design concerning all machine elements where friction, lubrication and wear play a significant part. In its most advanced form, tribodesign can be integrat...

Ngày tải lên: 27/06/2014, 06:20

... mechanical engineering in general. In any attempt to integrate tribology and tribodesign into mechanical engineering and machine design, it is advantageous to start by visualizing Basic ... machine design concerning all machine elements where friction, lubrication and wear play a significant part. In its most advanced form, tribodesign can be inte...

Ngày tải lên: 27/06/2014, 18:20