| 摘要 |
An energy-storing flywheel assembly (1) is provided with a flywheel (35) having a vertically-oriented axis of rotation, a shaft (20) connected to the flywheel, and a cageless ball thrust bearing (30) rotatably supporting a lower end (26) of the shaft. The flywheel may be formed from a stack of flywheel discs (37a, 37b, 37c) and is preferably relatively large-radiused and massive. The ball thrust bearing includes a stator (50) having a set of three free-floating bearing balls (58a, 58b, 58c) contained within a cylindrical stator recess (52); a rotor (60) rotatably mounted over the stator which likewise contains a set of three free-floating bearing balls (64a, 64b, 64c) within a cylindrical stator recess (62), and a single, middle bearing ball (70) centrally disposed between and in mutual engagement with the three bearing balls of the stator and the three bearing balls of the rotor. In operation, the relatively massive flywheel (35) is rotated at a peripheral speed that approaches but does not exceed the speed of sound to avoid fluid drag and the danger of explosive shattering. |
