EATON
WSB11206 WCSB Tensioner / Brake with ORB Coolant Ports Installation, Operation and Maintenance Manual E-CLCL-II009-E
August 2015
13
3.0 OPERATION
3.1
Conditions of Operation
The following Hazard Warnings are to be followed for
proper WCSB functioning:
Warning
Friction material must be worn in to achieve product
torque rating. Verify proper operation before putting
the product into service. See Section 3.3 for
additional burnishing procedures.
Warning
Protective means must be used to prevent oil,
grease, dirt or coolant from coming into contact with
the surfaces of the friction discs (8), (118), disc (119)
or the wear plates (3). Oil or grease on these parts
will significantly reduce the torque capacity of the
WCSB tensioner / brake assembly. Dirt or coolant will
produce erratic torque. Do not risk personal injury or
damage to the equipment!
Warning
Maximum free-wheeling speed must not exceed
the speeds listed in Table 6. Exposure to speeds in
excess of these values may cause the friction discs
(8) to burst and result in extensive damage to the
tensioner and / or cause personal injury.
Caution
For proper cooling of the WCSB tensioner / brake
assembly, it is required that the coolant inlet is
located as close as possible to the 6 o’clock position
and the outlet is located near the 12 o’clock position.
This will help to assure that all coolant cavities are
water-filled to help avoid over-heating.
Caution
For operation in subfreezing temperatures,
ethylene glycol antifreeze must be added to the
water. The antifreeze content of the mixture is
critical and should not exceed 50% by volume.
Excessive amounts of antifreeze will reduce
cooling capacity and can cause coolant leakage
due to overheating. Refer to Table 5.
Caution
Maximum ambient temperature is 110
o
F (43
o
C).
Minimum ambient temperature for closed loop
systems using ethylene glycol antifreeze is 0
o
F
(-18
o
C).For open loop systems using water, the
minimum temperature is 45
o
F (7
o
C).
Table 6
Maximum Disc Speeds
Maximum Maximum
Free
Slip Speed
Wheeling Speed
Size RPM
RPM
24WCSB 715
1200
36WCSB 475
700
48WCSB 360
600
3.2
Pressure and Speed Limits
3.2.1 Maximum allowable coolant pressure is 40 psig (2.8
bar) for the 36WCSB and 48WCSB tensioner / brake
assemblies and 45psgi (3.1 bar) for the 24WCSB
tensioner / brake assembly. The use of an
accumulator or pressure relief valve may be desirable
to reduce the effect of pressure spikes in the coolant
system during operation.
Warning
Maximum allowable water pressure is dependent
upon WCSB tensioner / brake assembly model.
Applied pressure or surges exceeding maximum
allowable may result in damage to the WCSB
tensioner / brake assembly.
3.2.2 Maximum slip speeds and free-wheeling disc speeds
are shown in Table 6.
Caution
Excessive slip speeds will result in rapid friction
material wear. For good life, the values in Table 9
should not be exceeded.
3.2.3 Maximum allowable pressure is 150 psig (10.2 bar)
in the spring set brake cylinder (19). Refer to the
assembly drawing (available on request) for
minimum pressure required for full release of the
spring set brake. Release pressure is dependent
upon the quantity of springs (22) (52) used in the
specific brake.
3.2.4 Maximum allowable pressure within the air applied
tensioner mounting flange / cylinder (112) is 150 psig
(10.2bar). Maximum operating pressure is specified
on the assembly drawing mentioned in section
before 3.2.3.
WCSB tensioner / brake with ORB coolant ports
Содержание Airflex WSB11206
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