| 摘要 |
A magnetic fluid sealing apparatus closes a portion between a shaft member provided at a rotation center and an external member concentrically arranged outside the shaft member. This magnetic fluid sealing apparatus includes magnetic circuit forming means, fixed to the external member, for forming a magnetc circuit between the magnetic circuit forming means and the shaft member, and a magnetic fluid held between the shaft member and the magnetic circuit forming means by the magnetic circuit. The magnetic fluid sealing apparatus also includes a scattering preventing means arranged close to the magnetic fluid and having a non-magnetic material projecting from the magnetic circuit forming means toward the shaft member.
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