PolyChain® GT Timing Belts - Walther Flender

Walther Flender Gruppe
PolyChain ® GT Timing Belts PAGE Page Page 05
5
General features
Positive power transmission
The positive meshing of the PolyChain®
belt teeth in the teeth of the drive pulleys
ensures the positive synchronous transmission
of power. Slippage and related deviations
in speed are eliminated.
Constant angular velocity
The PolyChain® timing belt wraps around
the timing belt pulley in a circular pattern
and not in the form of a polygon, preventing
periodic fluctuations and vibrations.
Cost effectiveness
Due to the high transmission capacity
of PolyChain® timing belt drive systems,
the pulley diameter and width can be
reduced substantially as compared with
other drive elements, saving additional
installation space within the machine
constructions.
With efficiency ratings as high as 98 %,
PolyChain® timing belts are modern drive
train elements that fully meet the trend for
energy-saving drive units.
Power and speed range
The power range of PolyChain® timing
belts extends from slow-running drive
units with extremely high torques, such
as those that are typical for heavy chain
drives, to high-performance drive units
with several hundred kW. Belt speeds of
more than 30 m/s are possible, in which
case it may be necessary to provide suitable
sound insulation.
.
.
No maintenance
While chain drives generally have to be
lubricated and require complex lubricating
systems even for relatively low peripheral
speeds, the PolyChain® timing belt drive
unit operates entirely without lubrication.
This minimizes the design and equipment
requirements, in addition to eliminating
contamination from the area around the
drive unit.
Noise level
The PolyChain® timing belt drive satisfies
requirements for low noise levels, as confirmed
by extensive tests in cooperation
with technical universities. The noise level
is reduced by the special profile of the Poly-
Chain® timing belt and by the capability of
Drehzahl der kleinsten Scheibe (1/min)
Speed of the smallest pulley (1/min)
Drehzahl der kleinsten Scheibe (1/min)
10000
5000
1000
100
10
10000
5000
1000
100
10
PC-8MGT2
PC-14MGT2
0,1 1 10 100 1000
Berechnungsleistung (kW)
Calculated power output (kW)
Diagram 1: Selection diagram: belt pitch PolyChain® GT2
Speed of the smallest pulley (1/min)
PCC-8MGTC
PCC-14MGTC
maintaining the same power transmission
with a narrower belt than those used in
other systems. At high belt speeds, various
options are available for reducing noise;
please ask our application engineers.
Constant belt tension
Since PolyChain® timing belts do not elongate
due to permanent plastic deformation
when used within the permissible power
range, the belt tension remains constant
once the belt has been adjusted. Due to
minimal stretching during the wear-in
period, the belt tension can decrease
slightly; one-time re-tightening is necessary
only in exceptional cases, eliminating
expensive and time-consuming maintenance
at regular intervals.
0,1 1 10 100 1000
Berechnungsleistung (kW)
Calculated power output (kW)
Diagram 2: Selection diagram: belt pitch PolyChain® GT Carbon TM
10000
.
10000
.