发明名称 |
HYDRAULIC SEAL FOR A TURBOCHARGER |
摘要 |
A hydraulic seal is defined between a rotating member such as a turbocharger shaft and a stationary member such as part of a bearing housing of a turbocharger. The members define a projecting annular disc that is received in an annular channel that is filled with hydraulic sealing fluid such as oil. Rotation of the rotary member applies a centrifugal force to the fluid thereby ensuring that it is retained in the channel between walls thereof and the disc. This annulus of fluid provides a hydraulic seal around the shaft between the bearing housing and the compressor or turbine housing. The oil is delivered into the channel from a supply in the rotary member. One of the walls of the channel serves as a weir whereby when the channel has an excess supply of oil is overflows the wall and passes the drain. The arrangement provides a seal against blow-by across the turbine end seal and restricts gas flow from the high pressure regions of the compressor and turbine housings into the low pressure area of the bearing housing. |
申请公布号 |
WO2008065359(A3) |
申请公布日期 |
2008.07.31 |
申请号 |
WO2007GB04501 |
申请日期 |
2007.11.26 |
申请人 |
CUMMINS TURBO TECHNOLOGIES LIMITED;PURDEY, MATTHEW, J. |
发明人 |
PURDEY, MATTHEW, J. |
分类号 |
F01D25/18;F01D11/04;F16J15/42 |
主分类号 |
F01D25/18 |
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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