|
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}
NEXT |
