Presentation 2006-06-23
Application of a magnetic fluid seal to rotary blood pumps
Daisuke SAKOTA, Yoshinori MITAMURA, Kazumitsu SEKINE, Tetsuya YANO,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) A magnetic fluid seal is exellent in durability because this enables contact free rotation of the shaft without fractional heat and material wears. However, when the seal is applied to a rotary blood pump, the seal fails in a week. The reason has been considered to be due to instability of the magnetic fluid sealing liquid interface induced by Kelvin-Helmholtz problem. The problem is liquid-to-liquid (Magnetic fluid/Sealing liquid) interface instability phenomenon by relative flow velocity difference of two liquids with different density. We developed for the magnetic fluid seal without the Kelvin-Helmholtz problem at relative flow velocity difference within 1.57m/s. However, when the seal, was applied to a rotary blood pump, the seal failed in 6 days. We therefore developed the magnetic fluid seal with "a shield" which minimized the effect of the rotary pump on the sealing liquid velocity. When the seal was applied to a rotary blood pump, the seal with "the shield" showed better durability (a life of 62 days).
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Magnetic fluid / Rotary blood pump / Kelvin-Helmholtz instability / Shield
Paper # MBE2006-26
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Conference Information
Committee MBE
Conference Date 2006/6/16(1days)
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Paper Information
Registration To ME and Bio Cybernetics (MBE)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Application of a magnetic fluid seal to rotary blood pumps
Sub Title (in English)
Keyword(1) Magnetic fluid
Keyword(2) Rotary blood pump
Keyword(3) Kelvin-Helmholtz instability
Keyword(4) Shield
1st Author's Name Daisuke SAKOTA
1st Author's Affiliation Institute of Biomaterials and Bioengineering Tokyo Medical and Dental University()
2nd Author's Name Yoshinori MITAMURA
2nd Author's Affiliation Hokkaido University
3rd Author's Name Kazumitsu SEKINE
3rd Author's Affiliation Institute of Development, Aging and Cancer, Tohoku University
4th Author's Name Tetsuya YANO
4th Author's Affiliation Akita Prefectural University
Date 2006-06-23
Paper # MBE2006-26
Volume (vol) vol.106
Number (no) 127
Page pp.pp.-
#Pages 4
Date of Issue