Hermetically sealed flywheel and method of making the same

Details Hermetically sealed flywheel and method of making the same Hermetically sealed flywheel and method of making the same

1990-12-11

1992-11-24

Braun, Leslie A.

Machine element or mechanism

Elements

Flywheel, motion smoothing-type

219 7801, 2191171, 219162, 228165, 228170, F04B 3900

Patent

active

051653052

ABSTRACT:
A flywheel assembly adapted to act also as a high inertia journal bearing in a canned pump or the like is composed of an annular core of heavy metal material which is hermetically sealed in a stainless steel casing formed by a number of enclosure pieces welded together along circumferential weld edges. The weld edges are specially configured by mating weld canopies provided on the respective pieces which minimize the potential for damage to the annular core during welding, and which act to minimize stress concentrations due to the welds and thermal expansion of the casing. An outer cylindrical shell of the casing is heat shrunk onto the outer core and grooves are provided in the outer surface of the annular core to axially secure the outer enclosure member to the core, and to ensure that thermal expansion of the cylindrical shell occurs substantially equally in each axial direction of the shell. The flywheel assembly includes radial and axial bearing surfaces provided on the outer casing. The casing configuration protects the heavy annular core, which may include depleted uranium, from oxidation and a reliable hermetic seal is insured by the welded edge configuration.

REFERENCES:
patent: 3450056 (1969-06-01), Heathcote et al.
patent: 3475631 (1969-10-01), Stark et al.
patent: 4084924 (1978-04-01), Ivanoff et al.
patent: 4596522 (1986-06-01), Onoda
patent: 4886430 (1989-12-01), Veronesi et al.
patent: 5058453 (1991-10-01), Graham et al.

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