CN103953397A - Last-stage dehumidifying stator blade of high-power turbine - Google Patents
Last-stage dehumidifying stator blade of high-power turbine Download PDFInfo
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- CN103953397A CN103953397A CN201410161121.4A CN201410161121A CN103953397A CN 103953397 A CN103953397 A CN 103953397A CN 201410161121 A CN201410161121 A CN 201410161121A CN 103953397 A CN103953397 A CN 103953397A
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- wet sump
- blade
- dehumidifying
- cavity
- blade body
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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
The present invention relates to a kind of stator blade, be specifically related to a kind of large steam turbine final stage dehumidifying stationary blade sheet.
Background technique
At present, the principle of conventional stator blade dehumidification structure, for to open an eliminating wet sump on stator blade surface, communicates with low pressure area, utilizes the pressure reduction suction stator blade surperficial moisture film except wet sump place inside and outside except wet sump, thereby reaches the object of dehumidifying.Consider effect on moisture extraction and pneumatic efficiency, suction surface equates for optimal case except the pressure at wet sump place except wet sump and pressure side, but, be subject to the restriction of the aspect such as blade profile, structure of stator blade, be difficult to accomplish this point, so suction surface removes wet sump and pressure side exists pressure reduction except between wet sump, moisture film crossfire, thus cause dehumidification rate low.
Summary of the invention
The present invention is that the suction surface of the existing dehumidification structure of solution removes wet sump and pressure side exists moisture film crossfire phenomenon except between wet sump, thereby causes the problem that dehumidification rate is low, and then proposes a kind of large steam turbine final stage dehumidifying stationary blade sheet.
The present invention addresses the above problem the technological scheme of taking to be: a kind of large steam turbine final stage dehumidifying stationary blade sheet of the present invention, it comprises blade body, multiple pressure sides remove wet sump and multiple suction surface removes wet sump, in blade body, be provided with blade cavity, be provided with multiple pressure sides except wet sump along blade body inner arc radially, multiple pressure sides are except the setting of wet sump interval, be provided with multiple suction surfaces except wet sump along blade body outer arc radially, multiple suction surfaces are except the setting of wet sump interval, described a kind of large steam turbine final stage dehumidifying stationary blade sheet also comprises gusset, gusset is axially disposed within blade cavity along blade body, blade cavity is divided into the first cavity and the second cavity by gusset, multiple pressure sides remove wet sump and are radially arranged to two parallel rows along blade body, multiple suction surfaces remove wet sump and are radially arranged to two parallel rows along blade body, multiple pressure sides remove wet sump and are all communicated with the first cavity, multiple suction surfaces remove wet sump and are all communicated with the second cavity.
The invention has the beneficial effects as follows: the present invention adopts, in blade cavity, gusset is set, blade cavity is divided into the first cavity and second cavity two-part, making the first cavity and pressure side remove wet sump is communicated with, the second cavity removes wet sump with suction surface and is communicated with, thereby avoid the generation of the crossfire phenomenon causing except the pressure difference between wet sump except wet sump and suction surface due to pressure side, and increase gusset, improved the bulk strength of blade.Meanwhile, pressure side is all arranged to two row's parallel structures except wet sump and suction surface except wet sump, makes dehumidification rate improve 30%.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention, and Fig. 2 is the A-A place sectional view of Fig. 1.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, a kind of large steam turbine final stage dehumidifying stationary blade sheet described in present embodiment, it comprises blade body 1, multiple pressure sides remove wet sump 3 and multiple suction surface removes wet sump 4, in blade body 1, be provided with blade cavity 2, be provided with multiple pressure sides except wet sump 3 along blade body 1 inner arc radially, multiple pressure sides are except wet sump 3 intervals settings, be provided with multiple suction surfaces except wet sump 4 along blade body 1 outer arc radially, multiple suction surfaces are except wet sump 4 intervals settings, described a kind of large steam turbine final stage dehumidifying stationary blade sheet also comprises gusset 5, gusset 5 is axially disposed within blade cavity 2 along blade body 1, blade cavity 2 is divided into the first cavity 2-1 and the second cavity 2-2 by gusset 5, multiple pressure sides remove wet sump 3 and are radially arranged to two parallel rows along blade body 1, multiple suction surfaces remove wet sump 4 and are radially arranged to two parallel rows along blade body 1, multiple pressure sides remove wet sump 3 and are all communicated with the first cavity 2-1, multiple suction surfaces remove wet sump 4 and are all communicated with the second cavity 2-2.
So arrange, avoided the generation of the crossfire phenomenon causing except the pressure reduction between wet sump 4 except wet sump 3 and suction surface due to pressure side, make pressure side remove wet sump 3 and suction surface and can play exsiccation except wet sump 4.And multiple pressure sides, except wet sump 3 and multiple suction surface are except wet sump 4 is the staggered intermittent configuration of two rows, have improved dehumidification rate.
Embodiment two: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, described in present embodiment pressure side except the axial width of wet sump 3 be 1.5mm～3.0mm, suction surface except the axial width of wet sump 4 be 1.5mm～3.0mm.So arranging, is to have considered effect on moisture extraction and blade strength, is optimum structural design.Other compositions are identical with embodiment one with annexation.
Working principle
The present invention establishes the parallel pressure side of two rows except wet sump 3 at blade body 1 inner arc, blade body 1 outer arc is established the parallel suction surface of two rows except wet sump 4, blade cavity 2 is divided into the first cavity 2-1 and the second cavity 2-2 by gusset 5, the first cavity 2-1 removes wet sump 3 with pressure side and is communicated with, the second cavity 2-2 removes wet sump 4 with suction surface and is communicated with, avoid the generation of the crossfire phenomenon causing except the pressure reduction between wet sump 3 except wet sump 4 and pressure side due to suction surface, pressure side is communicated with low pressure area after level respectively except wet sump 4 except wet sump 3 and suction surface, utilizing pressure side to remove the inside and outside pressure reduction of wet sump 3 and suction surface dehumidifies except wet sump 4 inside and outside pressure reduction.
Claims (2)
1. a large steam turbine final stage dehumidifying stationary blade sheet, it comprises blade body (1), multiple pressure sides remove wet sump (3) and multiple suction surface removes wet sump (4), in blade body (1), be provided with blade cavity (2), be provided with multiple pressure sides except wet sump (3) along blade body (1) inner arc radially, multiple pressure sides are except the setting of wet sump (3) interval, be provided with multiple suction surfaces except wet sump (4) along blade body (1) outer arc radially, multiple suction surfaces are except the setting of wet sump (4) interval, it is characterized in that: described a kind of large steam turbine final stage dehumidifying stationary blade sheet also comprises gusset (5), gusset (5) is axially disposed within blade cavity (2) along blade body (1), blade cavity (2) is divided into the first cavity (2-1) and the second cavity (2-2) by gusset (5), multiple pressure sides remove wet sump (3) and are radially arranged to two parallel rows along blade body (1), multiple suction surfaces remove wet sump (4) and are radially arranged to two parallel rows along blade body (1), multiple pressure sides remove wet sump (3) and are all communicated with the first cavity (2-1), multiple suction surfaces remove wet sump (4) and are all communicated with the second cavity (2-2).
2. a kind of large steam turbine final stage dehumidifying stationary blade sheet according to claim 1, is characterized in that: the axial width that pressure side removes wet sump (3) is 1.5mm～3.0mm, and the axial width that suction surface removes wet sump (4) is 1.5mm～3.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410161121.4A CN103953397B (en) | 2014-04-21 | 2014-04-21 | A kind of large steam turbine final stage dehumidifying stationary blade sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410161121.4A CN103953397B (en) | 2014-04-21 | 2014-04-21 | A kind of large steam turbine final stage dehumidifying stationary blade sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103953397A true CN103953397A (en) | 2014-07-30 |
| CN103953397B CN103953397B (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410161121.4A Active CN103953397B (en) | 2014-04-21 | 2014-04-21 | A kind of large steam turbine final stage dehumidifying stationary blade sheet |
Country Status (1)
| Country | Link |
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| CN (1) | CN103953397B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194292A (en) * | 2016-08-31 | 2016-12-07 | 中国船舶重工集团公司第七�三研究所 | Steam turbine rotary spacing plate |
| CN110030039A (en) * | 2019-05-16 | 2019-07-19 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine dehumidifying grade hollow shelf |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128060A (en) * | 2011-04-28 | 2011-07-20 | 武汉大学 | Superhydrophobic hollow dehumidifying stationary blade |
| CN103437831B (en) * | 2013-08-28 | 2015-06-17 | 国家电网公司 | Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device |
| CN203742678U (en) * | 2014-04-21 | 2014-07-30 | 哈尔滨汽轮机厂有限责任公司 | Last-stage dehumidification stator blade of high-power turbine |
-
2014
- 2014-04-21 CN CN201410161121.4A patent/CN103953397B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194292A (en) * | 2016-08-31 | 2016-12-07 | 中国船舶重工集团公司第七�三研究所 | Steam turbine rotary spacing plate |
| CN110030039A (en) * | 2019-05-16 | 2019-07-19 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine dehumidifying grade hollow shelf |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103953397B (en) | 2015-11-18 |
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Effective date of registration: 20230301 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Patentee after: HARBIN TURBINE Co.,Ltd. Patentee after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Patentee before: HARBIN TURBINE Co.,Ltd. |
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