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Flow dam design for labyrinth seals to promote rotor stability

机译：迷宫式密封的流量坝设计可提高转子的稳定性

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摘要

A method and apparatus for reducing steam swirl in a steam turbine. A plurality of seal segments (14) are circumferentially juxtaposed to form a seal ring (12) encircling the turbine shaft (10), each seal segment (14) supporting a plurality of circumferentially disposed annular seal fins (20) to limit axial steam flow along the shaft (10). A plurality of flow dams (40) are disposed within grooves (42) defined in the plurality of seal fins (20) and seal segments (14) for limiting circumferential steam flow and thereby reducing rotor instability.

机译：一种减少蒸汽轮机中的蒸汽涡流的方法和设备。多个密封段（ 14 ）沿周向并置以形成环绕涡轮轴（ 10 ）的密封环（ 12 ），每个密封部分（ 14 ）支撑多个沿圆周设置的环形密封翅片（ 20 ），以限制沿轴（ 10 ）的轴向蒸汽流。在多个密封片（ 20 ）和密封段（ 42 ）中限定的凹槽（ 42 ）内设置有多个导流坝（ 40 ）。 14 ）以限制周向蒸汽流，从而降低转子的不稳定性。 展开▼

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公开/公告号US2005067789A1

专利类型

公开/公告日2005-03-31

原文格式PDF

申请/专利权人 MATTHEW J. MCHALE;LEWIS GRAY;
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申请/专利号US20030672192

发明设计人 LEWIS GRAY;MATTHEW J. MCHALE;
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申请日2003-09-26

分类号F16J15/447;

国家 US

入库时间 2022-08-21 22:22:53

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2. 用于涡轮机的迷宫式密封衬套和用于安装具有迷宫式密封衬套的迷宫式密封装置的方法 [P] . 中国专利： CN102341628A . 2012-02-01

3. Flow dam design for labyrinth seals to promote rotor stability [P] . 美国专利： US7004475B2 . 2006-02-28

机译：迷宫式密封的流量坝设计可提高转子的稳定性

4. FLOW DAMS IN LABYRINTH SEALS TO IMPROVE ROTOR STABILITY [P] . 韩国专利： KR960004212B1 . 1996-03-28

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5. FLOW DAMS IN LABYRINTH SEALS TO IMPROVE ROTOR STABILITY [P] . CA1317613C . 1993-05-11

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6. Self-excited rotor vibrations by hydrodynamic forces in labyrinth seals. The effect of the inlet swirl on the system damping coefficient. [O] . Kenji TAKITA, Mitsumasa SATOH, Hiroshi AOKI 1988

7. Theory and measurements of labyrinth seal coefficients for rotor stability of turbocompressors [R] . Syssmann, H. R. 1987

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