Technical Description; General Description Type "Fa; Construction Of Couplings - Siemens Flender FLUDEX 4600 Series Operating Instructions Manual

5.

Technical description

Observe the instructions in section 3, "Safety instructions"!
5.1

General description Type "FA.."

103
102
7
105
106
8
163
Fig. 3: General description Type "FA.."
The FLUDEX coupling is a hydrodynamic fluid coupling working on the Föttinger principle. The coupling
parts on the in­ and output side are not connected to one another mechanically. The torque is transmitted
by the fluid flowing in the coupling and conducted via radial blades. During continuous operation very low
rotary speed slip occurs.
FLUDEX couplings of the "FA.." series are sutiable for both directions of rotation. They can be fitted in
a horizontal, angled or vertical position. The drive should preferably take place via the hollow shaft (106)
and the bucket wheel (105) to enable the advantages of the compensating chamber (7) and the working
chamber geometry to be utilised.
If locked or overloaded by the driven machine, the coupling heats up until the fusing temperature of the
safety fuse is reached.
When the safety fuse fuses, the operating fluid escapes and the drive motor is disconnected from the
driven machine. To prevent the operating fluid spurting out, electronically or mechanically controlled
thermal monitoring equipment (see separate operating instructions) can be used.
5.2

Construction of couplings

FLUDEX couplings are made up of a few, robust parts.
The inner rotor includes the hollow shaft (106), on which the bucket wheel (105) is mounted. The outer
housing comprises the cover (102) and the blade shell (101), which are connected via a screwed flange
connection.
The outer housing and the inner rotor are double­mounted one inside the other and sealed towards the
outside by shaft-sealing rings.
For filling the coupling, two filling plugs (153) are located in filling channels offset by 180° (to prevent
overfilling). For this a screw plug (163), offset on the periphery (by approx. 60°), to be used for ventilation
while filling, for checking the filling level and for draining off the operating fluid, is located in the coupling
flange. Opposite it is the fusible safety plug (103).
FLUDEX 4600 en
Operating instructions 10/2017
FAD
153
101
12
9
120
FAR
7 Compensating chamber
8 Working chamber
9 N­EUPEX add­on coupling
12 Flexible element (N­EUPEX)
101 Blade shell (outer wheel)
102 Cover
103 Fusible safety plug
105 Bucket wheel (inner wheel)
106 Hollow shaft
120 V­belt pulley
153 Filling plug
163 Screw plug
11