Mechanical Engineering-Tribology In Machine Design Episode 1 pdf
Mechanical Engineering-Tribology In Machine Design Episode 1 pdf
... design
1. 2 .1. Plain sliding bearings
1. 2.2. Rolling contact bearings
1. 2.3.
Piston, piston rings and cylinder liners
1. 2.4. Cam and cam followers
1. 2.5. Friction drives
1. 2.6. Involute ... wear in higher kinematic pairs
Introduction
Loads acting on contact area
10
Tribology in machine design
1. 2.5. Friction drives
Friction drives, which are being used increasi...
Mechanical Engineering-Tribology In Machine Design Episode 2 potx
...
2 tan0
simplified
Vabr
=-
-
71
H
WL,
Figure
2. 8
P
E
w3I2
refined
Vabr
=n2
~2
~3 12
L9
Ic
30
Tribology in machine design
where
k=h
-
2BmR.
If
1,
is known, then
In ...
determined by examining the plasticity index,
rl/.
However, in the mixed lubrication regime in which
A
is in the range
1.0-3.0, where most machine sliding contacts or
slid...
Mechanical Engineering-Tribology In Machine Design Episode 3 pdf
... defines the allowed ranges of certain
parameters. In using this equation these parameters cannot be allowed to
assume values for which the assumptions made in obtaining eqn (2.102) are
invalid. ...
Tribology in machine design
equilibrium, are the basis of the theory of fluid-film lubrication or
hydrodynamic lubrication.
The solution of the indefinite integral
(dp/dO)dO is gi...
Mechanical Engineering-Tribology In Machine Design Episode 4 pptx
... continues rapidly in a direction away from the
arrowhead point of origin, increasing in width and length. It is then called
spalling. Spalling occurs more often in rolling-element bearings ... so-called inclusion-origin failure. Inclu-
80
Tribology in machine design
3.7.3.
Refinement for thermal bulging in the conjunction zone
Thermal bulging relates to the fact that fri...
Mechanical Engineering-Tribology In Machine Design Episode 5 pps
... lubrication and wear in lower kinematic pairs
1 05
the fact that when
r>+
the machine will not sustain the load when the
effort is removed. Thus, referring to the inclined plane, Fig. 4.9, ... corresponding to the maximum
efficiency given above
and the mechanical advantage is reduced in the ratio 4. 75
:
0.9
=
5. 23
:
1.
In general, the following is approximately t...
Mechanical Engineering-Tribology In Machine Design Episode 6 ppt
...
=
2 267
Nm
kinetic energy developed in machine shaft
=
+lo2
=
44 .6
x
31.4~
=
2 267
Nm
thus
total energy supplied during the period of clutch slip
=energy dissipated
+
kinetic ...
=2 267
+
2 267 =4534Nm.
1
1
6
Tribology in machine design
and
Q
=pA
=
R,
sin
oc
hence,
torque transmitted
=
fpAr,, (4.45)
where
f
is the coefficient of friction...
Mechanical Engineering-Tribology In Machine Design Episode 7 ppt
... have from eqn (4.110)
tab
lZY
sin O sin(b
-
O)dO -0.
Again, expanding sin@
-
O) and integrating
411,-sin4$
tanP=
1
-
cos 4*
146
Tribology in machine design
F
=the maximum possible ... from the line of action of
R, and the above equations become
156
Tribology in machine design
;T
can be distinguished; free rolling, braking, accelerating, cornering or any
co...
Mechanical Engineering-Tribology In Machine Design Episode 8 ppsx
... 70.9 -83 .0 70.9-103 .8 27.7 6.57-20 .8 13 .84 14.7
-
-
-
-
-
-
-
-
-
Density (kg/m3)
7 169-74 18 3405 3792 16 331 287 9 24 08 1771 -1910 2297-2 685
Hardness
217-269 87 8 7 9 2 86 -88 280 0 ... fluctuating loads on cylindrical bearing films is more
difficult to analyse. Squeeze-film action is important in cushioning and
maintaining a film in linkage bearings suc...
Mechanical Engineering-Tribology In Machine Design Episode 9 pot
... established in the following areas:
(i) Machine tools. Use of gas lubrication in grinding spindles allows
attainment of high speeds with minimal heat generation.
196
Tribology in machine design ... parameters, including length, which is
useful in design and in plotting experimental results. It will be used here in
the remaining derivations and discussion of the prin...
Mechanical Engineering-Tribology In Machine Design Episode 10 docx
... expressed in
consistent units.
5.9.
Modern
Thin-wall bearings, defined as lined inserts which, when assembled into a
developments in journal
housing conform to that housing, are commonly used in ... where bearings have been designed with a reduced
236
Tribology in machine design
trailing wheels of a vehicle, however, rotate in bearings assumed to be
frictionless and t...
Mechanical Engineering-Tribology In Machine Design Episode 11 pot
... use in high-temperature rolling-element bearing lubrication. Primary
use of bonded films and composites containing solid film lubricants occurs
in plain bearings and bushing in the aerospace industry. ... following expression may be used
to determine the thermal correction factor for line contacts
In eqn
(6.28)
the thermal loading factor, Tl, is defined as
260
Tribology in m...
Mechanical Engineering-Tribology In Machine Design Episode 12 pot
... out. In most cases pitting is initiated in
the vicinity of the pitch line. At the pitch point there is only pure rolling
while above and below it there is an increasing amount of sliding aiong ... in machine design
transmitting power in the range of 100-500 kW at a pitch line velocity not
exceeding 15
nl s-
'.
The usual procedure is to determine both a thermal
rating...
Mechanical Engineering-Tribology In Machine Design Episode 13 pps
... further increase in
velocity. There is, however, one important difference in the lubrication
mechanism operating in plain journal bearings and in gears. In the case of
the journal bearings, ... bearing, 7
Rolling contact bearing, 7, 248
Rolling friction, 235, 248
Rolling of tyre, 155
Rope drive, 134
Run -in, 11
Screw jack, 105
Scuffing, 9,
1
1, 12, 278
Self-lubricating...
Plastics Engineered Product Design Episode 1 pdf
...
70
71
73
74
75
76
78
80
83
84
86
86
87
88
89
91
92
97
10 1
10 2
10 4
10 5
10 6
10 9
10 9
11 0
11 1
11 3
11 3
11 5
11 5
11 6
12 0
12 6
12 9
12 9
13 0
13 0
13 2
13 5
8
Plastics ...
15 4
15 4
15 5
15 6
15 7
15 7
15 8
15 9
15 9
15 9
16 1
16 1
16 5
16 7
16 8
17 0
17 0
17 1
17 2
17 3
1 74
1 74
17 7
17 7
17 8
18 0
18 9
19...
Tribology in Machine Design Episode 1 docx
... of
tribodesign
1
1 .1.
Specific
principles
of
tribodesign
4
1. 2.
Tribological problems
in
machine design
6
1. 2 .1. Plain sliding bearings
6
1. 2.2.
Rolling contact bearings
7
1. 2.3.
... Conditions
in the
cylinder
of an
internal combustion engine
can be
10
Tribology
in
machine design
1. 2.5.
Friction
drives
Friction drives, which
are
being u...
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