EATON
WSB11206 WCSB Tensioner / Brake with ORB Coolant Ports Installation, Operation and Maintenance Manual E-CLCL-II009-E
August 2015
15
3.4.2 Air pressure is first applied through the ports in the
mounting flange / cylinder (112) to apply force to the
piston (33) in the WCSB tensioner / brake assembly.
Adequate pressure should be applied to support
the load the WCSB tensioner / brake assembly is
controlling. Air pressure is then applied through the
ports in the cylinder (19) on the spring set section
of the WCSB tensioner / brake assembly, until it is
fully released.
Caution
Observe all pressure and speed limits while
operating the WCSB tensioner / brake assembly.
See Section 3.2.
3.4.3 After release of the spring set brake, slowly relieve
the air pressure within the mounting flange /
cylinder (112) to reduce the clamp force applied to
the friction disc assemblies (7), allowing the shaft
to rotate. Modulation of the air pressure will vary
the applied torque of the WCSB tensioner / brake
assembly. Modulation control is dependent upon the
specific pneumatic control system used. Refer to the
manufacturers information for operation of control
valves or feedback systems.
3.4.4 WCSB tensioner / brake assembly with dual pressure
pistons (33) provide a more finite range of control.
Each chamber within the dual pressure piston can be
pressurized independently or simultaneously.
Caution
When applying or exhausting operating pressure to
only one of two ports on units with dual pressure
pistons (33), the second piston pressure port must
be open/vented to atmosphere. Open ports should
be filtered to avoid contamination of the piston and
cylinder during piston operation.
3.4.5 Exhausting air pressure from the cylinder (19) of the
spring set brake allows it to engage. Air pressure
within the mounting flange / cylinder (112) can be
exhausted simultaneously with that in the cylinder
(19). For more rapid brake response, exhaust the air
pressure in the mounting flange / cylinder (112) after
engaging the spring set brake.
Note: The spring set brake is intended for parking or
emergency braking only.
Warning
Dynamic braking with the air cooled,
spring set brake is not recommended except for
emergency stopping situations or during initial
wear-in. High heat generated during dynamic
braking can result in damage or failure of the
WCSB tensioner / brake assembly's components.
Caution
Rapid engagement of a fully released WCSB
tensioner / brake assembly could result in pressure
spikes within the coolant cavities and subsequent
leakage.
3.5 Periodic
Maintenance
3.5.1 As the friction material wears, adjustment of
the brake may be required to keep pistons and
cylinders within the proper stroke range.
See the MAINTENANCE section for wear adjustment
procedures and component wear limits.
3.5.2 Periodically check for external air leakage in the
area of the piston seals (21) (23), and internal leakage
across the dual pressure piston seals (114).
For replacement, refer to procedures in
Section 4.6, Maintenance.
3.5.3 Moisture that may accumulate in the brake cylinder
can be purged on size all WCSB tensioner / brake
assemblies. With air pressure exhausted from the
cylinder, remove the pipe plug (105) at the 6 o’clock
position on the cylinder, and apply low air pressure to
assist in expelling any excess moisture. After draining
the cylinder, reinstall the pipe plug, applying a pipe
thread sealant on the threads prior to installation.
Caution
Applied air pressure greater than 10 psig (.69 Bar)
should not be used when draining the cylinder. Use
adequate shielding to avoid contact with direct spray
from moisture being purged from the cylinder.
3.5.4 Periodically observe the discs while the brake or
tensioner is fully released. Dragging discs may
be caused by wear or contamination of the gear
or disc splines, disc imbalance, warped discs, or
misalignment. Correct as required.
3.5.5 Pneumatic and electrical control interlocks
should be periodically checked for proper settings
and operation.
WCSB tensioner / brake with ORB coolant ports
Содержание Airflex WSB11206
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