| 摘要 |
PCT No. PCT/JP81/00149 Sec. 371 Date Nov. 17, 1981 Sec. 102(e) Date Nov. 17, 1981 PCT Filed Jun. 30, 1981 PCT Pub. No. WO82/00322 PCT Pub. Date Feb. 4, 1982.A highly reliable device for stopping the operation of a flywheel apparatus for storing electrical energy in the event of interruption of power supply includes a thrust plate 11 connected to the rotatory part of the apparatus, and having a lower surface defining a thrust bearing surface. A pressure receiving surface 26 facing the lower surface of the thrust plate, and defining a thrust bearing surface is provided with a plurality of radially extending grooves 27 each having at least one sidewall which defines an upwardly inclined land 28 as viewed in the direction of rotation of the rotatory part. Provided below the pressure receiving surface 26 is a cooling fluid passage 33 connected to an electromagnetic valve 35 adapted to open upon interruption of power supply to allow a cooling fluid to flow into the passage 33. The device further includes means for maintaining a hydraulic fluid between the thrust bearing surfaces during interruption of power supply.
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