j | BA 14.0168 | 10/2013
23
3.4 Friction work / operating frequency
10
1
10
2
10
3
10
4
10
5
10 10
2
10
3
10
4
25
20
18
16
14
12
10
08
06
Operating f requency S
h
[h
-1
]
Friction work Q [J]
Sizes
Fig. 4 Friction work as a function of the operating frequency
p
Üã~ñ
=
− p
ÜìÉ
äå
N −
n
o
n
b
n
ëã~ñ
= n
b
N − É
−p
ÜìÉ
p
Ü
The permissible operating frequency S
hmax
depends on the quantity of heat Q
R
(see Fig. 4).
If the operating frequency S
h
is specified, the permissible quantity of heat Q
smax
will result.
With high speed and friction work, the wear increases strongly, because very high
temperatures occur at the friction faces for a short time.
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