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Working sealing structure of axial-flow Kaplan turbine

A sealing structure and hydraulic turbine technology, applied in mechanical equipment, hydroelectric power generation, engine components, etc., can solve problems such as wear of the lower sealing plate and large pressure fluctuations of the working seal, so as to avoid local friction, reduce the wear rate, and improve pressure fluctuations Effect

Pending Publication Date: 2022-07-12
CHINA YANGTZE POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The sealing structure is an important part to ensure the safe operation of the turbine unit, but the structure is prone to defects such as large fluctuations in working sealing pressure during operation. The main reason for this problem is that the lower sealing plate is severely worn

Method used

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  • Working sealing structure of axial-flow Kaplan turbine
  • Working sealing structure of axial-flow Kaplan turbine
  • Working sealing structure of axial-flow Kaplan turbine

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Embodiment Construction

[0020] In order to make those skilled in the art better understand the technical solutions of the present invention, the preferred embodiments of the present invention will be described below in conjunction with specific examples, but it should be understood that the accompanying drawings are only used for illustrative description, and should not be construed as a reference to the present invention. Limitation; in order to better illustrate this embodiment, some parts of the drawings will be omitted, enlarged or reduced, which do not represent the size of the actual product; for those skilled in the art, some well-known structures and their descriptions in the drawings may be The omission is understandable; the positional relationship described in the drawings is only for exemplary illustration, and should not be construed as a limitation on the present patent.

[0021] The turbine of Gezhouba Hydropower Station is an axial-flow slug-type structure. Please refer to the attached...

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Abstract

The invention relates to the technical field of hydroelectric generation, in particular to an axial flow Kaplan turbine working sealing structure which comprises a sealing water tank for providing sealing pressure into a sealing cavity, an upper sealing mechanism and a lower sealing mechanism which are arranged in the axial direction of a main shaft are arranged in the sealing cavity, and the lower sealing mechanism comprises a lower flat plate and a lower wear-resistant ring. And the lower supporting plate is pressed and covered on the lower flat plate. The lower supporting plate is additionally arranged in the working sealing structure of the hydraulic turbine set, the pressure fluctuation of working sealing in the operation process of the hydraulic turbine set is improved, the operation stability and safety of the hydraulic turbine set are improved, the overhaul frequency of the hydraulic turbine set is reduced, and the economic benefit of operation power generation of a hydropower station is improved; the outer edge of the lower flat plate is prevented from tilting due to external pressure fluctuation in the operation process of the lower flat plate, so that the lower flat plate always keeps surface friction in the operation process, local friction is avoided, the abrasion rate of the lower flat plate is reduced, and the service life of the lower flat plate is prolonged.

Description

technical field [0001] The invention relates to the technical field of hydropower generation, in particular to a working sealing structure of an axial flow rotary paddle turbine. Background technique [0002] The working seal of the axial-flow rotary paddle turbine is a double-layer flat seal structure, and its main components are the upper flat plate, the lower flat plate, the sealing water tank and the pressure water pipe and other auxiliary parts. See attached figure 1 , The working sealing principle of the hydraulic turbine unit is to inject clean pressure water into the sealed water tank through the pressure water pipe. Close to the lower anti-wear ring, the upper and lower flat plates and the corresponding anti-wear ring respectively form two sealing surfaces, under the combined action of these two sealing surfaces, the turbid river water can be prevented from surging through the gap between the rotating part and the fixed part. The upper anti-wear ring and the lower...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B11/00
CPCF03B11/006F03B11/00Y02E10/20
Inventor 吴江吴涛王元元
Owner CHINA YANGTZE POWER
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