Auxiliary Drive; Auxiliary Drive, Designed As A Maintenance Drive - Siemens FLENDER B3 E Series Assembly And Operating Instructions Manual

5.17

Auxiliary drive

For certain applications the gear unit can, in addition to the main drive unit, be equipped with an auxiliary
drive unit. This enables the main gear unit to be operated at a lower output speed in the same direction of
rotation. The auxiliary drive is connected with the main gear unit by an overrunning clutch. For the basic
drive­train arrangement refer to figure 31.
Fig. 31: Basic design of the gear unit with main and auxiliary drives
1 Main motor
2 Auxiliary motor
3 Coupling
Depending on use, two auxiliary drives of different capacities are available for each gear­unit size.

5.17.1 Auxiliary drive, designed as a maintenance drive

The motor of the auxiliary drive is dimensioned in such a manner that it is possible to operate the conveyor
system when running idle ­ i.e. for operation without load ­ at low 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 type KF MOTOX 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 MOTOX bevel­gear motor has its own oil filling.
The auxiliary drive should be protected from overloads.
The drive of the conveyor system via the auxiliary drive must only be effected during
idle running, i.e. without load.
For the exact designation of the geared motor as well as the mounting position please refer to the drawings
(see section 1, "Technical Data"). The auxiliary gear unit has its own oil circulation system which is
separated from that of the main gear unit. 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
(Type KF MOTOX bevel­gear motor).
To avoid overspeeds in case of malfunctions of the overrunning clutch, the drive combination must be
equipped with a speed­monitoring device by the customer for safety reasons. The speed­monitoring
device consists of a pulse generator mounted in the intermediate flange (figure 32) and of an evaluating
instrument.
A threaded hole M12x1 for the pulse generator to be made available by the customer 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). The pulse generator must
satisfy the requirement "suitable for flush mounting".
4
7
5
2
4 Main gear unit
5 Auxiliary gear unit
6 Backstop
BA 5033 EN 03/2011
42 / 96
8
6
3
1
7 Overrunning clutch
8 Output shaft of the main gear unit