Curtiss-Wright EL30, Инструкция по установке и обслуживанию

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Curtiss-Wright | EL30 Rev. H PN23942 6/14/16 10
Grease Renewal
The angular contact thrust bearings located in the front of the
actuator, the roller screw cylinder, and the roller screw assembly are
the components that require grease. They require a
coating of
grease. They do not need to be packed with grease. Excess grease
only requires more torque from the motor when returned to operation,
and does not improve the lubrication of the unit.
1. Use a brush to work approximately 0.5 in
3
of grease for every 3
inches of stroke length into the roller screw cylinder. Be sure to
cover all of the threaded areas of the cylinder.
2. Use a brush to work grease in to the roller screw assembly. Be
sure to cover all the threaded surfaces of the screw assembly. This
can be accomplished by applying grease to a few places on the
roller screw assembly and rotating the components repeatedly in
both directions to work the grease into the assembly.
3. Force grease into the front of the thrust bearing assembly. Make a
concerted effort to insure that the grease is well worked in. Grease
must reach the bearing just behind the bearing that is visible as
well. Use the following amounts of grease for each size roller screw
and bearing: Use
EL30: 0.75 in
3
4.3 Reassembly
1. Rethread the roller screw into the internally threaded cylinder
(ITC). It is a multiple start screw, and this is not always easy.
DO NOT FORCE THE ROLLER SCREW INTO THE
CYLINDER. It is best to have the actuator vertical with the
open end of the roller screw cylinder facing up. Position the
roller screw above the cylinder so that it is aligned axially with
the ITC. Slowly turn the roller screw 1/4 to 1/2 a turn
counterclockwise with it in contact with the ITC. This will help
to align the threads on the roller screw with the threads in the
ITC. Rotate the roller screw clockwise and it should begin to
thread into the cylinder. If it does not turn freely, remove it
and begin again. When threading the screw into the cylinder,
it will roll freely into the actuator. When it reaches the portion
of the cylinder that contains the motor magnets, the roller
screw will be more difficult to turn because of the magnetic
field of the magnets. THIS IS NORMAL. Continue to thread
the roller screw into the cylinder. When it reaches the bottom,
it will become difficult to turn and the motor and bearings will
begin to rotate with it. The roller screw is now fully inserted
into the cylinder.