ThyssenKrupp TW63B, Руководство по эксплуатации

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Installation and Operational Instructions for
ROBA-stop
®
-Z Type 892.101.0
Size 125
(E073 01 046 000 4 EN)
14/10/2013 TK/HW/SU Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
Page 12 of 14 www.mayr.com , E-Mail: info@mayr.com
Braking Torque
The (nominal) braking torque is the torque effective in the shaft
train on slipping brakes, with a sliding speed of 1 m/s referring to
the mean friction radius.
The brake is loaded statically when used as a service brake and
loaded dynamically in EMERGENCY STOP operation.
Respectively, there are different speed values for the friction
material, which in practice also leads to different friction values
and therefore braking torques.
The braking torque is dependent on the respective run-in
condition of the friction surfaces.
We recommend allowing the friction surfaces to run in when
installed and under permitted loads.
Friction materials develop their optimum effect only under speed
at the appropriate contact pressure, as continuous regeneration
of the friction surface then takes place (torque consistency).
Furthermore, friction materials (synthetic resin bonded rubber
mixtures) are subject to ageing, which is also influenced, among
other things, by higher temperatures and other ambient
influences. We recommend regular inspection of the braking
torque (1 x per year) including the respective dynamic braking
actions as a refresher.
Brake Inspection
(before brake initial operation)

Air Gaps Inspection (Fig. 4)
Measure the air gap "a" (brake de-energised) several times
on the circumference.
The nominal air gap acc. Table 1 must be given.
Measure the min. individual air gap "b" (brake energised) of
brake circuit 1 (inside) and brake circuit 2 (outside) several
times on the circumference.
The respective minimal air gap acc. Table 1 must be given.

Braking torque inspection:
Please compare the requested braking torque with the
torque stated on the Type tag (24).

Release function inspection
by energising the brake.

Hand Release functional Inspection
By moving the hand release (18) manually, the friction
linings are relieved. The brake is free but for a residual
torque of max. 8 %.
The braking torque is not achieved until after the run-in
procedure has been carried out. The braking torque is the torque
effective in the shaft train on slipping brakes, with a sliding speed
of 1 m/s referring to the mean friction radius
(acc. DIN VDE 0580/07.2000).
When actuating the hand release (18), a
switching signal of the release monitoring
device (11) cannot be guaranteed.
Dual Circuit Brake Functional Inspection
The ROBA-stop
® –Z brake is equipped with a double safety
(redundant) braking system. If one brake circuit fails, min. 50 %
of the braking torque remain. The single brake circuit inspection
is carried out using the reference gauges (10) included in
delivery.
DANGER
Should the load begin to move after tilting the
feeler gauges (10) or should it fail to react to
the braking procedure, the reference gauges
must be pivoted back and removed
immediately.
The dual circuit braking function is not
guaranteed.
Shut down the system, lower and secure the
load, remove and inspect the brake.
Please observe the accident prevention
regulations.
Remove the
reference gauges (ideally attached to the motor or
the gearbox).
Inspection brake circuit 1 (mounting-side, see Fig. 1):
1. Push both reference gauges, 180° offset to each other, with
the flattened section between the brake body (2) and the
machine wall.
Set up the reference gauges at 90° (tilt) and hold in this
position (no spring force on rotor 1 (Item 5)).
2. Trigger an EMERGENCY STOP (with maximum load and at
maximum speed) and inspect the stopping distance.
3. Turn the flat sections of the reference gauges once more
and remove them from the brake.
Inspection brake circuit 2 (brake plate-side, see Fig. 1):
1. Push both reference gauges, 180° offset to each other, with
the flattened section between the armature disk (14) and
the brake plate (15). Set up the reference gauges at 90°
(tilt)
and hold in this position (no spring force on rotor 2 (Item
6)).
2. Trigger an EMERGENCY STOP (with maximum load and at
maximum speed) and inspect the stopping distance.
3. Turn the flat sections of the reference gauges once more
and remove them from the brake.
Attach the reference gauges to the motor or gearbox again.