发明名称 |
Ferrofin magnetic seal with opposed fin-like projections |
摘要 |
A ferrofin magnetic-fluid seal for hermetically sealing the space between a portion of a rotating member of magnetically permeable material and a portion of a close-fitting, spaced-apart stationary member also fabricated from magnetically permeable material and comprising a part of a housing for journalling the rotating member. The ferrofin magnetic-fluid seal is comprised of a plurality of concentric, fin-like projections of magnetically permeable material formed on each of the rotating member and the stationary member in spaced-apart opposing relation to define a plurality of magnetic gap regions. The magnetic ferrofluid is disposed within the magnetic gap regions. A magnetic field producing means is magnetically coupled in closed magnetic circuit relationship with at least the portions of the rotating and stationary members, the opposed fin-like projections and the magnetic ferrofluid trapped in the magnetic gaps defined between the opposing ends of the fin-like projections. The new and improved ferrofin magnetic-fluid seal can be used either alone or in conjunction with a centrifugal seal to form a combination magnetic/centrifugal fluid-seal.
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申请公布号 |
US4440402(A) |
申请公布日期 |
1984.04.03 |
申请号 |
US19820361787 |
申请日期 |
1982.03.25 |
申请人 |
MECHANICAL TECHNOLOGY INCORPORATED |
发明人 |
PINKUS, OSCAR;WALOWIT, JED A. |
分类号 |
F16J15/40;F16J15/43;(IPC1-7):F16J15/16;F16J15/44 |
主分类号 |
F16J15/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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