Page 342 - The Tribology Handbook

c11 Lubrication of flexible coudinrrs

CONTINUOUSLY-LUBRICATED GEAR
COUPLINGS

Lubrication depends on coupling type

a a

Figure 11.4 Damless-type coupling
Oil
- d

0.4
Figure 11.2 Dam-type coupling

0 t Anti-sludge hole
0.3

E
Oil supply d
- @ z

0.2
Figure 11.3 Dam-type coupling with anti-sludge
holes

Limits:
0.1
set by centrifuging of solids or sludge in oil causing 4000 5000 6000 8000
coupling lock: 7000
Speed, rpm
damless-type couplings 45 X lo3 m/sec2 Figure 11.5 Lubrication requirements of gear coup-
dam-type couplings 30 X lo3 m/sec2
lings
Lubricant feed rate:

damless-type couplings Rate given on Figure 11.5
dam-type coupling with 50% of rate on Figures 11.5
sludge holes
dam-type coupling without 25% of rate on Figures 11.5
sludge holes

Lubricant:

Use oil from machine lubrication system (VG32, VG46 or
VG68)

c11.2