发明名称 |
LEAF SEAL |
摘要 |
A leaf seal is proposed for effecting a seal between two coaxial and relatively rotating components. The seal has an annular pack of stacked leaves, the pack being mountable to a first one of the components at root portions of the leaves and extending towards the other component such that end edges of the leaves cooperate to define a seal surface of the pack which is presented for air-riding interaction with a surface of the other component during relative rotation between the components such that, in use, a pressure drop is maintained axially across the pack. The seal surface of the pack incorporates a plurality of hydrodynamic lift-generating recesses spaced circumferentially around the pack. Each said recess extends circumferentially across a plurality of adjacent leaves in the pack, each of which leaves being spaced radially from said surface of the other component along at least part of its end edge. |
申请公布号 |
US2015001808(A1) |
申请公布日期 |
2015.01.01 |
申请号 |
US201414317651 |
申请日期 |
2014.06.27 |
申请人 |
ROLLS-ROYCE PLC |
发明人 |
FRANCESCHINI Gervas;EDWARDS David Anthony |
分类号 |
F16J15/32;F01D11/00 |
主分类号 |
F16J15/32 |
代理机构 |
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代理人 |
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主权项 |
1. A leaf seal for effecting a seal between two coaxial and relatively rotating components, the seal having an annular pack of stacked leaves, the pack being mountable to a first one of the components at root portions of the leaves and extending towards the other component such that end edges of the leaves cooperate to define a seal surface of the pack which is presented for air-riding interaction with a surface of the other component during relative rotation between the components such that, in use, a pressure drop is maintained axially across the pack; wherein the seal surface of the pack incorporates a plurality of hydrodynamic lift-generating recesses arranged circumferentially around the pack, each said recess extending circumferentially across a plurality of adjacent leaves in the pack, each of which leaves being spaced radially from said surface of the other component along at least part of its end edge. |
地址 |
LONDON GB |