一种贯流式机组伸缩节密封结构
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAOZHUSI HYDROPOWER PLANT OF HUADIAN SICHUAN POWER GENERATION CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-17
AI Technical Summary
The expansion joint sealing structure of a cross-flow turbine is prone to leakage during operation due to vibration of the runner chamber. The pressure plate bolts of the traditional hard connection are easily damaged, resulting in poor sealing performance.
It adopts the size matching of the expansion joint and the impeller chamber, sets two sealing rings and a sealed cavity, and is equipped with a drain hole and an air blowing hole. The traditional pressure plate form is eliminated. The sealing is achieved by the size matching and structural design of the sealing ring. Leaking water is discharged through the drain hole and foreign objects are cleaned through the air blowing hole.
It improves the sealing effect, prevents water leakage, protects the sealing structure from vibration, ensures that the sealing ring is not damaged, and achieves stable sealing performance.
Smart Images
Figure CN224515292U_ABST
Abstract
Claims
1. A seal structure for a hydraulic turbine unit expansion joint, characterized in that It includes a telescopic joint (2) and a rotating chamber (1); the outer periphery of the tail of the rotating chamber (1) is provided with a first sealing ring (3) and a second sealing ring (4) at intervals; the telescopic joint (2) is installed on the outer side of the tail of the rotating chamber (1), and the inner wall of the telescopic joint (2) presses the first sealing ring (3) and the second sealing ring (4) to form a sealed cavity between the first sealing ring (3) and the second sealing ring (4).
2. The expansion joint seal for tubular turbine units according to claim 1, characterized in that The lower part of the expansion joint (2) is provided with a drain hole (8) that communicates with the sealed cavity.
3. The expansion joint seal for tubular turbine units according to claim 2, characterized in that The upper part of the expansion joint (2) is provided with an air blowing hole (5) that communicates with the sealed cavity.
4. The expansion joint seal for tubular turbine units according to claim 3, characterized in that A sealing bolt (6) is provided on the air blowing hole (5).
5. The sealing structure of the expansion joint of the axial flow unit according to claim 1, characterized in that, The telescopic joint (2) is circumferentially provided with adjusting bolts (7) for adjusting the position of the impeller chamber (1).