Mayr BRE250, Инструкции по эксплуатации

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Installation and Operational Instructions for BRE250 and BRE400
ROBA-stop
®
-M brake Type 891. 0_ _._
Sizes 250 and 500
(E070 09 203 001 4 EN)
31/10/2019 TK/MW Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 10 of 20 www.mayr.com , E-Mail: info@mayr.com
your reliable partner
Table 1: Technical Data
Size: 250 500
Type: 891.01_._ 891.02_._
Nominal braking torque: 250 Nm 400 Nm
Braking torque tolerance (conditioned): +40% / -20% +40% / -20%
Braking torque tolerance (without conditioning): +40% / -30% +40% / -30%
Reference speed n
ref
: 750 rpm 750 rpm
Max. speed n
max
(brake engagement): 3600 rpm 3000 rpm
Permitted idle speed: 4700 rpm 3800 rpm
Nominal voltage U
N
: see Type tag see Type tag
Electrical power at nominal voltage P
N
: see Type tag see Type tag
Electrical connection, magnetic coil: 2 x 0.88 mm2 2 x 0.88 mm2
Mass with cap screw, without hand release and without hub: 25.9 kg 35.9 kg
Weight of hub / hand release assembly / hand release bar 0.98 kg / 1.27 kg / 1.28 kg 2.95 kg / 2.46 kg / 1.28 kg
Nominal air gap “a” +0.20/-0.05 (Figs. 2/4/6/8):
0.35
+0.1
-0.05
mm 0.40
+0.2
mm
Max. permitted air gap “a” after wear (Figs. 2/4/6/8)
1)
: 0.95 mm 1.0 mm
Minimal width of the counter friction surface: 14 mm 19 mm
Tightening torque Item 6: 45 Nm 45 Nm
Tightening torque Item 8: 18.5 Nm 18.5 Nm
Rotor thickness “new” (+0.08 mm):
17 mm 18.5 mm
Minimum rotor thickness: 16.4 mm 17.9 mm
Mass moment of inertia (hub + rotor):
71.8 x 10
-4
kgm2 215 x 10
-4
kgm2
Friction work Q
r 0.1
(per 0.1 mm wear):
130 x 10
6
J 170 x 10
6
J
Friction work Q
r ges.
(max. possible friction work related to nominal air
gap):
780 x 10
6
J 1700 x 10
6
J
Duty cycle: 100% 100%
Protection (Type 891.0_ _.0): IP 54 / IP55
2)
IP 54 / IP55
2)
Protection (Type 891.0_ _.1): IP 66 IP 66
Ambient temperature: -20 °C to +40 °C -20 °C to +40 °C
1)
Customer-side changes of the spring configuration have an effect on the maximum permitted air gap.
2)
When installed, under a fan cover provided by the customer, Protection IP55 is valid.
The stated value Q
r 0.1
is only a reference value for specific friction work values < 0.5 J/mm
2
and sliding speeds < 10 m/s.
Table 2: Changes in switching time t
11
for different spring configurations
Size Spring configuration Braking torque t11
250 8 x D21.5 250 Nm 100%
250 7 x D21.5 218 Nm 160%
250 6 x D21.5 187 Nm 220%
500 14 x D15 + 2 x D24.5 400 Nm 100%
500 11 x D15 + 2 x D24.5 350 Nm 137.5%