发明名称 |
Plural fluid magnetic/centrifugal seal |
摘要 |
A plural fluid magnetic/centrifugal-fluid seal is provided for hermetically sealing the space between a rotated shaft member and a close fitting spaced-apart stationary housing wherein the housing and the shaft are shaped to provide magnetic pole-like close clearance gap regions between their opposed surfaces. A high viscosity ferromagnetic fluid normally is disposed in the magnetic gap region with the rotating shaft member at rest and at low rotational speeds. A permanent magnet or electromagnet is provided which forms a closed magnetic circuit through the magnetic gap region with the high viscosity ferromagnetic fluid. A circumferentially arranged centrifugal seal forming region is radially disposed outward from the magnetic gap region and is located between the rotatable shaft and the stationary housing member. A low viscosity centrifugal sealing fluid is disposed in the centrifugal seal forming region and is centrifugally thrown outwardly during high speed rotation of the rotating shaft member to form a centrifugal hermetic seal between the rotating shaft member and the housing at high rotational speeds of the rotating member.
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申请公布号 |
US4335885(A) |
申请公布日期 |
1982.06.22 |
申请号 |
US19800179432 |
申请日期 |
1980.08.19 |
申请人 |
MECHANICAL TECHNOLOGY INCORPORATED |
发明人 |
HESHMAT, HOOSHANG |
分类号 |
F16J15/42;F16J15/43;(IPC1-7):F16J15/42;F16J15/56 |
主分类号 |
F16J15/42 |
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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