Seakeeper 8000 GYRO - Page 8

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OPERATION
MANUAL
Product: Document#: Rev: Page:
MODEL8000GYRO 90141 3 4of11
Section1:SYSTEMOVERVIEW
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1.1 GyroAssembly
The gyro assembly consists of a flywheel housed in a cast aluminum vacuum‐tight enclosure.The
flywheel spins about a vertical axis and is supported by upper and lower pairs of bearings.A DC
brushlessmotormountedinsidetheenclosurespinstheflywheelathighspeed.
The enclosure is fastened to
 two gimbal shafts that are supported by gim bal  bearings on either side.
These shafts establish an athwartship gimbal axis about which the flywheel and enclosure precess or
rotateupto+/‐60degreesduringoperation.Eachofthegimbalbearingsissupportedbyasaddlebeam
whichisbondedto
thehullstructure.Thesebeamstransfertheloadsthatthegyroproducestothehull
structure.
Anactivehydraulicbrakemechanismislocatedonthegyro assemblytoregulatethegyro’sprecession
motionsaboutthegimbalshaft.Itincludestwohydrauliccylindersmountedonthebrakesaddlebeam
andahydraulic
manifoldonthenon‐brakesaddlebeam.
Acoolantpump,heatexchangerwithreservoir,andther mostaticmixingvalvearelocatedonthebrake
saddle beamnear the hydraulic cylinders.Braces forward andaft ofthe enclosure connect the brake
andnon‐brakesaddlebeams.Aglycol/watermixiscirculatedthru
aclosedlooptothemotordrivebox,
hydraulicmanifold,andtheendcapsoftheenclosuretoremoveheat.
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FIGURE3–GYROASSEMBLY