Seal structure in power storage device

Japanese Patent JP6323641

B2

PROBLEM TO BE SOLVED: To prevent deterioration in cooling efficiency by securely blocking gas at a place where the rotation shaft of a fly wheel is journaled.SOLUTION: A power storage apparatus 1 is provided in which a fly wheel 5 under a cryogenic temperature and high vacuum is rotated to store electric power as kinetic energy. The power storage apparatus 1 includes a gas encapsulation mechanism 20 that journals a lower rotation shaft 4 and is provided between a vacuum vessel 8 for accommodating the fly wheel 5 and the lower rotation shaft 4. The gas encapsulation mechanism 20 includes: a rotary magnetic body 21 that rotates together with the fly wheel 5; a stationary member 22 that is fixed to the vacuum vessel 8 and has a gap 23 between the stationary member 22 and the rotary magnetic body 21; magnetic fluid 24 accommodated in the gap 23 between the rotary magnetic body 21 and the stationary member 22; and the rotary magnetic body 21 and a magnetic material 25 that keep the magnetic fluid 24 in the gap 23.

Arai
Ken Nagashima
Keisuke Yoshizawa
Masafumi Ogata
Yoshiki Miyazaki
Tetsuo Kubo
Tomofumi Shibata

JP2013217326A

May 16, 2018

October 18, 2013

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Railway Technical Research Institute
Emergy Inc.

H02J15/00; F16C17/02; F16C32/04; F16J15/43

JP4031368U
JP6233479A
JP2008086095A
JP58131474A
JP58099558U
JP2027017U
JP10213146A
JP2010249118A
JP2012196099A

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Suzuki Mitsuyoshi
Yasuhiko Murayama

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