Stacked disc flywheel

Details Stacked disc flywheel Stacked disc flywheel

2007-09-11

2007-09-11

Kim, Chong H. (Department: 2167)

Machine element or mechanism

Elements

Power generating-type flywheel

Reexamination Certificate

active

10148935

ABSTRACT:
A high-speed steel flywheel for a flywheel uninterruptible power is constructed by stacking several unpierced steel discs together. Each disc is heat treated prior to assembly. Thin axial thickness of each disc enables complete rapid quenching to attain a fully hardened condition and development of high tensile strength. The individual discs are machined or ground to shape and assembled to form an axially thicker flywheel capable of storing several kilowatts of energy or more. The discs are attached together by welding, brazing, soldiering, bonding or an interference assembly. The stacked disc configuration minimizes chances of catastrophic failure of the flywheel due to initiation of a crack in a single disc by restricting axial crack propagation to that single disc, and supporting the cracked disc by one or more adjacent discs until the flywheel can be safely decelerated.

REFERENCES:
patent: 3775831 (1973-12-01), Cachat
patent: 3788162 (1974-01-01), Rabenhorst et al.
patent: 4000665 (1977-01-01), Rabenhorst
patent: 4244240 (1981-01-01), Rabenhorst
patent: 4385845 (1983-05-01), Hoshino
patent: 4538079 (1985-08-01), Nakayama et al.
patent: 4608874 (1986-09-01), Audren
patent: 4629947 (1986-12-01), Hammerslag et al.
patent: 5398571 (1995-03-01), Lewis
patent: 5590569 (1997-01-01), Nardone et al.

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