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Last-stage dehumidifying stator blade of high-power turbine

A steam turbine and high-power technology, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problems of low dehumidification efficiency, achieve the effect of improving dehumidification efficiency and improving the overall strength

Active Publication Date: 2014-07-30
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of low dehumidification efficiency caused by the water film cross-flow phenomenon between the dehumidification tank on the suction side and the dehumidification tank on the pressure side of the existing dehumidification structure, the present invention further proposes a dehumidification static blade in the final stage of a high-power steam turbine

Method used

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  • Last-stage dehumidifying stator blade of high-power turbine
  • Last-stage dehumidifying stator blade of high-power turbine

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 and figure 2 This embodiment is described. The final stage dehumidification static blade of a high-power steam turbine described in this embodiment includes a blade body 1, a plurality of dehumidification tanks 3 on the pressure surface and a plurality of dehumidification tanks 4 on the suction surface. The blade body 1 is provided with blades The cavity 2 is provided with a plurality of pressure surface dehumidification tanks 3 along the radial inner arc of the blade body 1, and the multiple pressure surface dehumidification tanks 3 are arranged at intervals, and a plurality of suction surface dehumidification tanks are arranged along the radial outer arc of the blade body 1 4. A plurality of dehumidification tanks 4 on the suction surface are arranged at intervals. The last-stage dehumidification static blade of a high-power steam turbine also includes a rib plate 5, which is arranged in the blade cavity 2 along the ...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination figure 1 and figure 2 To describe this embodiment, the axial width of the dehumidification tank 3 on the pressure side in this embodiment is 1.5 mm to 3.0 mm, and the axial width of the dehumidification tank 4 on the suction side is 1.5 mm to 3.0 mm. Such a setting is an optimal structural design that comprehensively considers the dehumidification effect and blade strength. Other compositions and connections are the same as those in the first embodiment.

[0010] working principle

[0011] In the present invention, two rows of parallel pressure surface dehumidification grooves 3 are arranged on the inner arc of the blade body 1, and two parallel rows of parallel suction surface dehumidification grooves 4 are arranged on the outer arc of the blade body 1, and the rib plate 5 divides the blade cavity 2 into the first cavity 2 -1 and the second cavity 2-2, the first cavity 2-1 communicates with the dehumidification tank 3 o...

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Abstract

The invention relates to a stator blade, and specifically relates to a last-stage dehumidifying stator blade of a high-power turbine, which is used for solving the problem of low dehumidifying efficiency caused by water film series flow phenomena existing between suction surface dehumidifying tanks and pressure surface dehumidifying tanks of an existing dehumidifying structure. The last-stage dehumidifying stator blade of the high-power turbine comprises a rib plate, wherein the rib plate is arranged in a blade hollow cavity along the axial direction of a blade body, the blade hollow cavity is divided into a first hollow cavity and a second hollow cavity by the rib plate, multiple pressure surface dehumidifying tanks are arranged in two parallel rows along the radial direction of the blade body, multiple suction surface dehumidifying tanks are arranged in two parallel rows along the radial direction of the blade body, the multiple pressure surface dehumidifying tanks are communicated with the first hollow cavity, and the multiple suction surface dehumidifying tanks are communicated with the second hollow cavity. The last-stage dehumidifying stator blade disclosed by the invention is used for the high-power turbine.

Description

technical field [0001] The invention relates to a stationary vane, in particular to a dehumidifying stationary vane at the final stage of a high-power steam turbine. Background technique [0002] At present, the principle of the commonly used dehumidification structure of the stator blade is to open a wet removal tank on the surface of the stator blade, which communicates with the low pressure area, and use the pressure difference inside and outside the dehumidification tank to suck the water film at the dehumidification tank on the surface of the stator blade, so as to achieve the purpose of dehumidification . Considering the dehumidification effect and aerodynamic efficiency comprehensively, it is the optimal solution to equalize the pressure at the dehumidification tank on the suction side and the dehumidification tank on the pressure side. There is a pressure difference between the surface dehumidification tank and the pressure side dehumidification tank, and the water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D9/02
Inventor 石玉文刘云锋付丽鹏高永新金子印周佳惠段森曲文波
Owner HARBIN TURBINE