| 发明名称 |
SEAL STRUCTURE AND ROTARY MACHINE |
| 摘要 |
In a seal structure that seals a gap between a first structure and a second structure which faces the first structure in a radial direction and rotates relative to the first structure, one of the first structure and the second structure has a base surface and a step surface that protrudes toward the other side from the base surface, and the other is provided with: a first fin which extends toward the step surface and forms a first gap between the step surface; a second fin that, on the downstream side of the first fin, extends toward the base surface and forms a second gap between the base surface; and a protrusion part that is disposed between the first fin and the second fin and that divides a leak flow, into a first vortex along the first fin and a second vortex along the second fin. |
| 申请公布号 |
US2017022838(A1) |
申请公布日期 |
2017.01.26 |
| 申请号 |
US201415039580 |
申请日期 |
2014.11.26 |
| 申请人 |
MITSUBISHI HITACHI POWER SYSTEMS, LTD. |
发明人 |
KUWAMURA Yoshihiro;MATSUMOTO Kazuyuki;OYAMA Hiroharu;TANAKA Yoshinori;NISHIKAWA Toyoharu;UEHARA Hidekazu;NISHIMOTO Shin |
| 分类号 |
F01D11/02;F01D11/08;F16J15/447;F01D5/12 |
主分类号 |
F01D11/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A seal structure that seals a gap between a first structure and a second structure which faces the first structure in a radial direction and rotates relative to the first structure about an axis, wherein
one of the first structure and the second structure has a base surface and a step surface that protrudes toward the other side from the base surface, wherein the other is provided with: a first fin which extends toward the step surface and forms a first gap at a space with respect to the step surface; a second fin that, on a downstream side of the first fin, extends toward the base surface and forms a second gap at a space with respect to the base surface; and a protrusion part that is disposed between the first fin and the second fin and that divides a leak flow which has passed through the first gap, into a first vortex along the first fin and a second vortex along the second fin, and wherein the protrusion part includes a reattachment edge that extends in the circumferential direction and causes the leak flow to be reattached thereon, wherein the reattachment edge is provided in a position between a downstream side end part of the step surface and the second fin in the axial direction, and between the step surface and the other structure in the radial direction. |
| 地址 |
Kanagawa JP |
