Auxiliary Drive, Designed As A Maintenance Drive Or Load Drive - Siemens FLENDER H SH Series Assembly And Operating Instructions Manual

5.14.1 Auxiliary drive, designed as a maintenance drive or load drive

The motor of the auxiliary drive is dimensioned such that conveyor system can be operated at a lower
speed in the same direction of rotation. The auxiliary gear unit is flanged to the main gear unit by means
of an intermediate flange. The auxiliary gear unit is a MOTOX N bevel­gear motor coupled to the main gear
unit by means of an overrunning clutch. The overrunning clutch is accommodated within the intermediate
flange and is supplied with oil from the main gear unit. The MOTOX­N bevel­gear motor has its own oil filling
which is separated from the main gear unit.
The auxiliary drive should be protected from overloads.
For the exact designation of the geared motor as well as the mounting position please refer to the
dimensioned drawing.
The auxiliary gear unit is already filled with oil when delivered.
Before connecting the motor, determine the direction of rotation of the three­phase
current supply using a phase­sequence indicator, and connect the motor in
accordance with the pre­determined direction of rotation.
Observe the notice fixed to the gear unit.
The Special operating instructions should be observed for operation of the auxiliary gear unit
(MOTOX­N bevel­gear motor).
To avoid overspeeds in case of malfunctions of the overrunning clutch and for safety reasons, the drive
combination is equipped with a speed monitoring device. The speed monitoring device (EOC system)
consists of a pulse generator mounted in the intermediate flange (Figure 32), and of an evaluating
instrument.
A threaded M18x1 hole for the pulse generator is provided at a suitable position in the
intermediate flange. The dimension "x" depends on the instructions given by the equipment
manufacturer (see Figure 32).
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Fig. 32: Auxiliary drive
1 Main gear unit
2 Auxiliary gear unit
3 Intermediate flange
The speed­monitoring device must be connected in such a manner that the main drive is disabled
automatically at "> Zero" speed at the output shaft of the auxiliary drive. For safety reasons, the disabling
function must be checked at regular intervals, i.e. at least quarterly. To check the disabling function, the
auxiliary drive is switched on. If the speed­monitoring device connects ­ which can be verified, for instance,
by means of a warning light ­ the speed­monitoring device is ready for operation.
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7
"X"
4 Drive shaft
of main gear unit
5 Backstop
BA 5030 en 02/2013
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3
"X"
6
1
"X"
7
6 Overrunning clutch
7 Pulse generator for speed monitoring
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3
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