一种消减高水头水泵水轮机上冠间隙流道内腔不连续涡结构的密封环装置
By adjusting the local dimensions and layout of the sealing ring, the discontinuous vortex structure in the inner cavity of the crown gap flow channel of the high-head pump turbine was reduced, the problem of flow-induced vibration of the top cover was solved, and the safe and stable operation of the unit was achieved.
CN117189449BActive Publication Date: 2026-07-17CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
- Filing Date
- 2023-08-30
- Publication Date
- 2026-07-17
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Figure CN117189449B_ABST
Abstract
本发明提供一种消减高水头水泵水轮机上冠间隙流道内腔不连续涡结构的密封环装置，包括：径向上与上冠间隙外腔和上冠间隙内腔连接的上冠间隙迷宫密封环，所述上冠间隙迷宫密封环为多级迷宫密封环，外侧连接上冠间隙流道外腔，内侧接上冠间隙内腔；所述上冠间隙迷宫密封环包括多级密封环、多级密封腔和多级密封齿。本发明是基于常规迷宫密封环结构，明确了各级密封环的尺寸和体型，并对最后一级密封环的密封尺寸提出约束条件，以此抑制最后一级密封环进入内腔的射流流速，从而消减了射流与内腔不连续涡结构的相互作用，抑制了间隙内腔不连续涡结构及其产生的压力脉动，消减了内腔不连续涡引起的流激振动隐患。
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