Weir Warman 650 M200-MCR-G, Руководство пользователя, Страница: 165 / 287

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BA 5010 EN 03.10
5.8 Backstop
For certain requirements, the gear unit can be fitted with a mechanical backstop. This backstop permits
only the specified direction of rotation during the operation of the unit. The direction of rotation is marked
by a corresponding arrow on the input and output side of the gear unit.
The backstop is mounted oiltight on an adapter flange on the gear unit and integrated in its oil­circulation
system.
The backstop is fitted with centrifugally operated sprags. If the gear unit rotates in the prescribed direction,
the inner ring rotates with the sprag cage in the direction of shaft rotation, while the outer ring remains
stationary. From a specific speed up (disengagement speed) the sprags disengage from the outer ring.
In this operating condition the backstop operates wearfreely.
6
5
3
4
2
1
Fig. 24: Backstop
1 Outer ring 4 Shaft
2 Inner ring 5 Cover
3 Cage with sprags 6 Residual­oil drain
The stop direction can be changed by turning the cage around. If a change in stop
direction is required, FLENDER should be consulted beforehand.
To avoid damaging the backstop or the gear unit, the motor must not be run
adversely to the stop direction of the gear unit.
Observe the notice fixed to the gear unit.
The minimum lift­off speeds must not be exceeded during operation.
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.