| 摘要 |
A flywheel apparatus for energy storage and recovery typically includes a housing 1 within which there is a chamber in which a flywheel 3 on a shaft 4 rotates. The chamber is evacuated to at or near vacuum pressure, so that air resistance-related energy losses of the flywheel 3 as it rotates are reduced. Maintaining near-vacuum pressure within the chamber requires an effective seal between the housing 1 and the shaft 4. The effective seal must be maintained despite any relative movement (in particular translational movement) of the flywheel 3 and the housing 1. To this end, the shaft is mounted via a bearing arrangement on a carrier 12, 13 on which is also mounted a sealing arrangement 11. The carrier 12, 13 is mounted on the housing 1 such that the carrier 12,13, the bearing arrangement and the sealing arrangement 11 move substantially together relative to the housing 1. |
