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GP
Series
The primary function
of rotary couplings
is for the purpose
of transferring
either liquids,
such as water or
thermal oil to a
rotating workpiece
such as a roll or
screw so as to either
heat or cool the
unit, or air for
the purpose of actuating
a brake or clutch,
or both.
OPERATION
The coupling consists
of a main housing,
which remains stationary,
and a hollow shaft
which is able to
rotate. The latter
is normally attached
to the rotating
workpiece by either
a thread or a flange.
The media being
transferred enters
the coupling via
either the axial
or radial ports
of the housing and
is discharged into
the workpiece via
the hollow rotating
shaft.
The seal between
the housing and
shaft is affected
by means of a balanced
mechanical seal.
On the outside of
the housing is a
grease nipple for
lubricating the
bearings as well
as bleed holes,
which allow for
drainage of media
from the housing
in the event of
excessive wear,
this also indicates
that the seal is
leaking.
MONO-FLOW:
The mono-flow configuration
allows the media
to flow into the
rotary coupling
through either the
radial or axial
ports and be discharged
into the workpiece
via the hollow shaft.
In this configuration
the liquid is usually
returned via a second
coupling fitted
to the opposite
side of the workpiece.
The shafts of these
couplings are also
handed so as to
eliminate the tendency
to unscrew themselves
during operation.
DUAL-FLOW:
The dual-flow configuration
allows the media
to enter the rotary
coupling by means
of the axial port
at the rear of the
unit, which is fitted
with a dual-flow
adaptor. A siphon
tube is screwed
into the dual-flow
adaptor. The siphon
tube extends through
the hollow shaft
into the workpiece,
into which the media
is the discharged.
The media then returns
back around the
outside of the siphon
tube, through the
hollow shaft and
is discharged via
the radial port.
INFORMATION
NEEDED TO SPECIFY
ROTARY COUPLING
1. PRODUCT: What
is the product going
through the rotary
coupling?
2. PRESSURE: What
pressure is the
product running
at?
3. SPEED: What speed
in revolutions per
minute is the workpiece
rotating at?
4. TEMPERATURE:
What temperature
is the product?
5. THREAD SIZE:
What is the thread
size of the shaft,
radial and axial
ports?
6. HANDING OF THE
SHAFT THREADS: Is
the shaft thread
left or right handed?
(This does not pertain
to the radial and
axial ports)
7. DUAL-FLOW/MONO-FLOW:
Is the rotary coupling
in a dual-flow or
mono-flow application?
8. DOES THE MEDIA
CONTAIN ABRASIVES?
9. DOES THE MEDIA
CONTAIN AGGRESSIVE
CHEMICALS?
|
|
MONO
FLOW |
DUO
FLOW |
|
Water |
2000 Kpa (290
psi) |
2000 Kpa |
|
Air |
1000 Kpa (145
psi) |
1000 Kpa |
|
Steam |
800 Kpa (116
psi) |
800 Kpa |
|
Oil |
600 Kpa (87
psi) |
600 Kpa |
|
Temperature |
160°C (320°F) |
160°C |
|
Rpm's |
1500 |
1000 |
|
MACHINERY
AND INDUSTRIES
WHERE ROTARY
COUPLINGS
ARE USED |
|
MACHINERY |
INDUSTRY |
|
Rolling
Mills |
Steel |
|
Ball
Mills |
Aluminium |
|
Calendar
Rolls |
Rubber and
Plastic |
|
Extruders
& Mixers |
Rubber and
Plastic |
|
Air
Clutches and
Brakes |
Widely used
but sell most
to Corrugated
Cardboard
industry |
|
Die
Plants |
Textiles |
|
Sizing
Lines |
Textiles |
|
Guillotines
and Eccentric
Presses |
Press Shops |
|
Flexible
Packaging |
Printing |
|
Mixers |
Rubber |
|
Mills |
Paper and
Pulp |
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