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Steam turbine stator blade and steam turbine

A technology for steam turbines and stationary blades, applied in the direction of machines/engines, supporting components of blades, mechanical equipment, etc., can solve problems such as the inability to obtain sliding contact areas, and achieve the effect of suppressing self-excited vibration

Active Publication Date: 2013-08-07
MITSUBISHI POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to manufacturing tolerances (manufacturing deviations) of the stator blades and sliding contact parts, sometimes the sliding contact parts are partially in contact with the inner surface of the blade, and the sliding contact area in the design (planning, calculation) proposal cannot be obtained

Method used

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  • Steam turbine stator blade and steam turbine
  • Steam turbine stator blade and steam turbine
  • Steam turbine stator blade and steam turbine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0049] Figure 1 to Figure 3 A first embodiment of the steam turbine according to the present invention is shown. Figure 4 to Figure 9 The first embodiment of the stator blade of the steam turbine according to the present invention is shown. Next, the first embodiment of the steam turbine and the first embodiment of the stator blade of the steam turbine will be described respectively.

[0050] [Description of Steam Turbine 1]

[0051] exist figure 1 In , symbol 1 is the steam turbine in the first embodiment. The steam turbine 1 is, for example, a steam turbine used in a nuclear power plant. The nuclear power plant includes: a steam generator 2 that generates high-pressure steam, a high-pressure steam turbine 3 that directly supplies high-pressure steam from the steam generator 2, and separates moisture from the steam from the steam generator 2 and the high-pressure steam turbine 3 The moisture separation heater 4 that heats it, and the low-pressure steam turbine (low-pre...

no. 2 approach

[0081] Figure 10 A second embodiment of the steam turbine stator blade according to the present invention is shown. Next, the stator blade of the steam turbine according to the second embodiment will be described. in the figure, with Figure 1 to Figure 9 The same symbols in the symbols represent the same part.

[0082] In the above-described first embodiment, the stator blade 7 of the steam turbine is composed of a single leaf spring member. In contrast, the stator blades 7 of the steam turbine in the second embodiment, such as Figure 10 As shown, the leaf spring member 190 is divided into a plurality of blade members 17, 18 in the longitudinal direction. roughly equal contact area) into nine slices. That is, the positioning portion 27 is divided into a plurality (nine) by the groove 32 together with the elastic contact portion 28 and the connection portion 29 of the leaf spring member 190 .

[0083] The stator blade 7 of the steam turbine according to the second embo...

no. 3 approach

[0086] Figure 11 (A) and (B) show the third embodiment of the stator blade of the steam turbine according to the present invention. Next, the stator blade of the steam turbine according to the third embodiment will be described. in the figure, with Figure 1 to Figure 10 The same symbols in the symbols represent the same part.

[0087] In the steam turbine stator blades 7 according to the first and second embodiments described above, the leaf spring members 19 and 190 are divided into a plurality (nine pieces) by the grooves 32 having substantially equal widths, and divided into a plurality (nine pieces) The contact areas of the elastic contact portions 28 of the leaf spring members 19 and 190 are substantially equal to the inner surface 22 of the back member 18 (the contact area of ​​the elastic contact portion 28 on the tip side is slightly different from the contact area of ​​the other elastic contact portions 28 ). . On the other hand, in the stator blade 7 of the ste...

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PUM

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Abstract

The present invention comprises blade members (17, 18) within which a space (14) is formed, and a leaf spring member (19) disposed in the space (14) of the blade members (17, 18) and elastically contacting inner surfaces (21, 22) of the blade members (17, 18). The leaf spring member (19) includes a positioning portion (27), an elastic contact portion (28), and a coupling portion (29). The elastic contact portion (28) includes a plurality of divided portions disposed along a longitudinal direction of the blade members (17, 18). As a result, according to the invention, the elastic contact portion (28) can elastically contact the inner surfaces (21, 22) of the blade members (17, 18) across substantially the entire surfaces of the inner surfaces (21, 22) without partial contact. Thus, the area of elastic contact between the elastic contact portion (28) and the inner surfaces (21, 22) of the blade members (17, 18) is increased, enabling a reliable suppression of flattering in a stator blade.

Description

technical field [0001] The present invention relates to a stator blade of a steam turbine having a space formed therein. Furthermore, the present invention relates to a steam turbine including a stator blade having a space formed therein. Background technique [0002] In order to reduce the weight of the stator blade of a steam turbine and the steam turbine, there is known a hollow structure in which a space is formed inside the stator blade. In addition, in order to improve the performance of the stator blades of steam turbines and steam turbines, it has been proposed that the stator blades be provided with slits connecting the inner space and the outside of the stator blades, and the water (steam, water droplets) attached to the surface of the stator blades will be removed. ) into the internal space of the stator blade to remove it (for example, refer to Patent Document 1). [0003] In the stator blades with a hollow structure, depending on the exterior shape (geometric ...

Claims

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Application Information

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IPC IPC(8): F01D9/02F01D25/04
CPCF05D2300/501F01D9/04F01D9/041F01D5/16F01D5/26F01D25/06F05D2260/96F01D25/00F01D9/02F01D25/04
Inventor 山下洋行大山宏治丸山隆山本勇辉檀野将平
Owner MITSUBISHI POWER LTD
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