FLYWHEEL STABILITY SLEEVE
A flywheel rotating assembly has a flywheel mass that receives a sleeve that receives peripheral portions of a hub that is mounted on a shaft.
1 . A flywheel assembly comprising;
a rotatable shaft supplying mechanical energy to and receiving mechanical energy from a means for exchanging mechanical energy;
a hub having a central passage and first and second peripheral projections, said central passage receiving at least a portion of the shaft;
a mass for storing kinetic energy, said mass having a central cavity;
the first peripheral projection immovably coupled to a sleeve;
the second peripheral projection slidably engaged with the sleeve; and,
the mass receiving in its central cavity at least a portion of the sleeve.
2 . The flywheel assembly of claim 1 wherein the means for exchanging mechanical energy is an electric motor and an electric generator.
3 . The flywheel assembly of claim 1 wherein the means for exchanging mechanical energy is an electric motor-generator.
4 . The flywheel assembly of claim 3 wherein an anti-friction material separates at least a portion of the second peripheral projection and the sleeve.
5 . The flywheel assembly of claim 4 wherein the anti-friction material is a vacuum compatible dry-film lubricant.