METHOD FOR PRODUCING A KINETIC ENERGY STORAGE SYSTEM

摘要

A flywheel energy storage system incorporates various embodiments in design and processing to achieve a very high ratio of energy stored per unit cost. The system uses a high-strength steel rotor rotating in a vacuum envelope. The rotor has a geometry that ensures high yield strength throughout its cross-section using various low-cost quenched and tempered alloy steels. Low-cost is also achieved by forging the rotor in a single piece with integral shafts. A high energy density is achieved with adequate safety margins through a pre-conditioning treatment. The bearing and suspension system utilizes an electromagnet that off-loads the rotor allowing for the use of low-cost, conventional rolling contact bearings over an operating lifetime of several years.

主权项

1. A flywheel device comprising:
a sealed housing section; a rotor disposed within the housing section; a bearing housing comprising lower contact bearings and upper contact bearings disposed between the rotor and a plate; and an off-loading electromagnet configured to provide a vertical off-loading force that lifts the rotor against the upper bearings and off of the lower bearings.