Wichita Clutch CBA Combination Clutch Brake - Manual (Page 6)

67 I N D U S T R I A L C L U T C H P R O D U C T S
Model CBA
MODEL CBA COMBINATION CLUTCH-BRAKE
COOLER
TEMP.
SWITCH
PRES.
SWITCH
OIL ANNULUS
HEATED OIL
FROM CLUTCH-BRAKE FILTER
COOLED OIL
TO CLUTCH-BRAKE
BRAKE/QUILL
SUPPORT MEMBER
PITOT TUBE CIRCULATION SYSTEM PUMPS OIL
TO EXTERNAL COOLER AND DISC PACKS WHEN
FLYWHEEL ROTATES IN EITHER DIRECTION
EXTERNAL COOLING DESCRIPTION
For those applications requiring external cooling, the pitot
tubes scoop the oil from the rotating column of oil within the
Model CBA’s housing. This oil contains the engagement
heat. The oil is then pumped through passages drilled in the
quill support member to an external cooler where the
engagement heat is removed.
Cooled oil returns through a different set of passages drilled
in the quill support member and is introduced through a
series of orifices directly into the center of the clutch and
brake disc packs. This oil provides the cooling for the disc
packs and removes the heat of engagement. It then returns
to the rotating column of oil where it is again removed by the
pitot tube pumping system and delivered to the cooler to
repeat the cycle.
The pitot tube pumping system is bi-directional and will
pump oil from either direction of rotation. Being a centrifugal
type pumping system, its output is related to the speed of
rotation. This closely matches the cooling oil requirements of
the disc packs since engagement energy is also related to
the speed of rotation in the same manner.
This system is completely self-contained and requires no
additional energy source other than housing rotation. If the
housing rotates, oil is delivered in the correct quantity to the
disc packs.
Low pressure switches,(indicating low oil level), as well as
hi-temperature switches, and a filter are normally included
as shown to complete the cooling lube system.
Figure 3