Bosch Rexroth Hagglunds VI 64 Series - Draining of Brake Cylinders

40/68 Installation
Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
Draining of brake cylinders
The diagram below shows how the braking torque M
max.
for dierent brake cylinders
falls in proportion to the counter pressure in the brake cylinder drain line.
Example:
Double-acting brake equipment BA-63 has a brake cylinder designated BCI-M-1X
and a maximum braking torque (M
max.
) of 65 000 Nm/47 900 lbf·ft when the brake
cylinder is not under pressure and µ = 0.35.
Assume that the counter pressure in the brake cylinder drain line is 1.5 bar/75 psi.
The diagram then shows the actual brake torque (M
act.
) that corresponds to only
60% of M
max.
.
0
1,5
5
10
15
20
bar
0
50
100
%
50
150
200
250
100
300
350
psi
BCI-M-1X
BCI-M-30
Back pressure in brake cylinder drainage line.
WARNING
If the brake is used in cold environment as an emergency brake, it must be ushed.
WARNING
Motors with special brakes may have dierent working operations.
Please check the ordering code for your brake.