Hydroturbine possessing cylinder-shaped valve bottom end surface seal
An end-face sealing, barrel valve technology, applied in mechanical equipment, hydroelectric power generation, engine components, etc., can solve the problems that the molding seal cannot meet the sealing requirements of the barrel valve body, leaking water flow, etc., to improve the service life and protect the seal. parts, stable performance
Inactive Publication Date: 2008-09-17
TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD
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Problems solved by technology
[0002] Due to the particularity of the structure of the hydraulic turbine cylindrical valve, the existing various forming seals cannot meet the sealing requirements between the lower end surface of the cylindrical valve body and the bottom ring; When the water flow is stopped, after the cylinder valve is closed, there is still leakage between the lower end of the valve body and the seat ring
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[0011] In order to further understand the content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0012] Such as figure 1 As shown, the vertical section is a right-angled trapezoidal rubber sealing ring 3 with a small upper part and a large bottom part and an annular pressure plate 4 with a right-angled trapezoidal shape with a large upper part and a small bottom part. On the groove, and the end surface of the upper end of the rubber sealing ring 3 is higher than the end surface of the upper end of the annular pressure plate 4 . A plurality of screw holes are distributed on the annular groove of the seat ring 6, and the number of screw holes distributed on the annular groove of the seat ring 6 also has the same number of holes on the shape pressing plate 4; The hole fixes the annular pressure plate 4 in the corresponding screw hole on the annular ...
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The invention relates to a water turbine with a cylinder valve sealed the lower head face, which comprises a cylinder valve, a seat ring, a right-trapezoid sealing ring component and a ring-shaped pressure plate, wherein, an inner circle corner of an upper head face of the seat ring bottom is provided with a ring-shaped groove; a rubber sealing ring component is fixedly connected to and tightly fixed by the ring-shaped pressure plate on the ring-shaped groove of the seat ring, and the rubber sealing ring component and the ring-shaped pressure plate are rightly matched and positioned inside the ring-shaped groove of the seat ring; sealing convex ring is arranged at the lower inner circle of the cylinder valve body; when the cylinder valve is closed downwards, the sealing convex ring is connected with the upper end of the rubber sealing ring. As the material of the sealing ring with high-quality granule wear resistance, stable performance and medium elasticity is adopted, the sealing ring and the ring-shaped pressure plate adopt the right-trapezoid structure, and the sealing convex ring projecting to the direction of the circle center is arranged at the lower inner circle of the valve body of the cylinder valve. Therefore, the structure is beneficial to sealing fixation, meets the needs of sealing and protects the sealing component. In addition, a hexagon socket screw bolt sinks into the interior of the ring-shaped pressure plate, thus ensuring that the screw bolt does not disturb the water flow state in the flow passage.
Description
technical field [0001] The invention belongs to a water turbine, in particular to a water turbine with a lower end face seal of a cylindrical valve. Background technique [0002] Due to the particularity of the structure of the hydraulic turbine cylindrical valve, the existing various forming seals cannot meet the sealing requirements between the lower end surface of the cylindrical valve body and the bottom ring; When the water flow is stopped, after the cylindrical valve is closed, there is still leakage water flow between the lower end of the valve body and the seat ring. Contents of the invention [0003] In order to solve the technical problems in the known technology, the present invention provides a water turbine with a seal on the lower end face of the cylindrical valve, which can meet the sealing requirements between the lower end face of the valve body and the seat ring of the cylindrical valve. [0004] The technical solution adopted by the present invention to...
Claims
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IPC IPC(8): F03B15/04
CPCY02E10/226Y02E10/20
Inventor 周学均严孟王军单庆臣
Owner TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD