Eagle Industry Co., Ltd.

Railway Technical Research Institute

Keisuke Yoshizawa

Yuki Arai

Tomohisa Yamashita

Masafumi Ogata

Shinji Nishida

Yoshihisa Takano

A magnetic fluid sealing structure () for high-speed rotation for sealing a gap (S) between a shaft member () and a housing member () disposed around the shaft member (), which are rotatable, includes: magnetic force generating means () which is fixed to the housing member () and generates a magnetic force; magnetic pole members () disposed on both sides in an axial direction of the magnetic force generating means (); and a magnetic fluid () which is magnetically held between the magnetic pole members () and the shaft member () by the magnetic force of the magnetic force generating means () and seals the gap (S) therebetween, in which the shaft member () has a plurality of different material layers concentrically laminated in a radial direction, and an outermost diameter layer () of the shaft member (), which holds the magnetic fluid (), is made of a magnetic material.

Growing community of inventors

Tokyo, Japan

Keisuke Yoshizawa