| 设计方案 |
| Influences on the service life:
Wear and service life of the UNAT slide bearings are
dependent on the following:
● Specific bearing load
● Sliding speed
● PV value
● Roughness depth of the mating surface
● Mating surface material and
● Temperature etc. and so on |
 |
| During running-in, some of the surface of the
PTFE/Pb or
solid lubricants is transferred to the mating
surface. A
running surface is formed which has low coefficient
of
friction and this has a positive effect on the
operating
behaviours. For 3-layer dry bearings, after running
-in, some
of the porous bronze layer can be seen on the
sliding layer
as individual areas of different size. This shows
that the
bearing is functioning correctly. |
 |
| The
PV value has a considerable influence on the bearing
service
life. It is the product of the specific load P and
the
sliding speed V and the PV is very important design
data, we
recommend design lower PV value will leads to a
longer
service life. |
 |
| Direction of
Motion and PV Value |
F: Vertical
load...................................................................................N
{kgf}.
N: Number of
rotation........................................................................S-
1{rpm}
c: Cylic velocity of reciprocatingor oscillating
motion
S: Stroke
distance.............................................................................m{mm}
θ: Oscillating
angle...........................................................................rad{}
d: Bearing
ID......................................................................................mm
{mm}
D: Bearing
OD....................................................................................mm
{mm}
L: Bearing
length...............................................................................mm{mm}
W: Bearing
width...............................................................................mm{mm}
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