CN2921294Y - Large power turbine medium-pressure horsepower blade - Google Patents
Large power turbine medium-pressure horsepower blade Download PDFInfo
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- CN2921294Y CN2921294Y CN 200520048083 CN200520048083U CN2921294Y CN 2921294 Y CN2921294 Y CN 2921294Y CN 200520048083 CN200520048083 CN 200520048083 CN 200520048083 U CN200520048083 U CN 200520048083U CN 2921294 Y CN2921294 Y CN 2921294Y
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Abstract
The utility model pertains to high-power steam turbine medium-pressure cylinder blade, specifically a high-power steam turbine medium-pressure saber blade, comprising a blade root, blade profiles and a shroud band. It is characterized in that the dynamic and static blade profiles are variable cross section warped blades, curved along their circumference, so that when the blades are formed, the blade height of each cross section of the blades can translate along the circumference; the blade root is a fir-shaped blade root, mounted laterally; the blade top is an integrated shroud band. The utility model can reduce secondary flow loss at the end, improve the efficiency of the medium-pressure cylinder and reduce the whole unit heat loss effectively.
Description
(1) technical field
The utility model relates to large steam turbine intermediate pressure cylinder blade.
(2) background technique
Large steam turbine is being born the function that the heat energy of primary energy is transformed into mechanical energy, is topmost high speed rotating power equipment in the world today.The pneumatic efficiency of intermediate pressure cylinder will directly influence the Economy of complete machine, and existing intermediate pressure cylinder blade often adopts prismatic blade, twisted blade, and its secondary flow loss is bigger.
(3) summary of the invention
The purpose of this utility model is to provide presses the sabre blade in a kind of large steam turbine, press the sabre blade can effectively reduce the end secondary flow loss in this, improves intermediate pressure cylinder efficient.
The utility model is achieved in that presses the sabre blade in a kind of large steam turbine, comprise blade root, blade profile, shroud, it is characterized in that sound leaf blade profile is the variable cross section twisted blade, its circumferential skewing can be with the high corresponding circumferential translation of each cross section leaf of blade during blade forming; Blade root is a fir tree blade root, and side direction is installed; The leaf top is the integral (tip) shroud form.
Press the sabre blade in the above-mentioned large steam turbine, the circumferential skewing of described sound leaf blade profile variable cross section twisted blade is approximately curved 10 degree in top, curved 15 degree of root.
Press the sabre blade in the above-mentioned large steam turbine, described blade applications height is from 160～215mm, 25～50 ° of each cross section established angles, axial width 78～73mm, 55～58 ° of bottom section inlet angles scopes, 83～89 ° of top cross-section inlet angles range.
The utility model adopts brand-new bending united forming technology, keeping on the basis of decreasing than the low blades type, by blade at blade root, Ye Dingqu to the different direction bending, in blade path, radially form " C " shape pressure distribution, boundary layer pressure both ends high, middle low forms certain pressure gradient, has reduced the end secondary flow loss effectively, the application of this sabre blade can effectively improve intermediate pressure cylinder efficient, reduce the complete machine hear rate.
(4) description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the calculating blade grid of middle pressure sabre blade;
Fig. 2 is the long-pending folded figure of middle pressure sabre vane type line;
Fig. 3 is the front view of middle pressure sabre blade;
Fig. 4 is middle pressure sabre blade-side view;
Fig. 5 is middle pressure sabre blade plan view;
Fig. 6 is that E-E is blade root intermediate shape to view among Fig. 4;
Fig. 7 is typical section figure;
Fig. 8 is the enlarged view of leaf top girth band.
Among the figure: 1 blade root, 2 blade profiles, 3 shrouds.
(5) embodiment
Press the sabre blade in a kind of large steam turbine, its citation form is integral (tip) shroud blade (ISB), is divided into blade root 1, blade profile 2, shroud 3 three parts.
Referring to Fig. 1, Fig. 2, Fig. 7, sound leaf blade profile 2 is technical original variable cross section twisted blade, carries out certain circumferential skewing, and its form is that 10 degree are approximately bent at the top, and curved 15 degree of root specifically see Table the long-pending variation of folding point coordinates in the Y direction of throat in 1.During blade forming, can get final product according to original prismatic blade or the high corresponding circumferential translation of each cross section leaf of twisted blade.Can know from Fig. 1 and see blade that by the crooked rule of blade, radially form " C " shape pressure distribution in blade path, boundary layer pressure both ends high, middle low forms certain pressure gradient along circumferential crooked rule.The feature of blade variable cross section, bending united forming as can see from Figure 2; Mark point among Fig. 7 is exactly throat long-pending folded some position.Concrete established angle, geometry advances flow outlet angle, and the long-pending folded point coordinates of throat, can see Table 1.
Referring to Fig. 4, Fig. 5, Fig. 6, press sabre blade applications height from 160～215mm in the steam turbine, 25～50 ° of each cross section established angles, axial width 78～73mm, 55～58 ° of bottom section inlet angles scopes, 83～89 ° of top cross-section inlet angles range.Fig. 4 has listed 1～8 position, vane type line cross section and corresponding height, and corresponding data is listed in the table 1.Fig. 6 is blade root 1 an intermediate shape.
Referring to Fig. 3, blade root 1 is a fir tree blade root, adopts side direction to install.
Referring to Fig. 8, Fig. 4, integral (tip) shroud 3 forms are adopted on the leaf top, can increase blade integral intensity, and shroud 3 tops can be provided with labyrinth gland as required, also the stage teeth packing can be set, and reduce the interstage leakage loss.
The utility model intermediate pressure cylinder sabre blade has good blade grid passage mobile performance, can significantly weaken radially secondary flow and the horizontal secondary flow of end wall, and can eliminate the separation of flow and Modelling of Flow with Recirculation under the design conditions, and the original prismatic blade of its damaged on end reduces by 0.3%.Pressing sabre type blade in such, applicable to 300MW, 600MW series Steam Turbine Through IP Admission part, is example with overcritical 600MW unit, can make intermediate pressure cylinder efficient improve 1%, the complete machine hear rate reduces about 0.25%, and every machine can be saved coal 3000t/, and reduces discharging greatly.
Table 1 sabre type movable vane molded lines cross section geometric data
| The cross section | Pitch (cm) | Axial width (cm) | Chord length (cm) | Established angle (°) | The geometry inlet angles (°) | The geometry flow outlet angle (°) | Throat long-pending folded point coordinates (X, Y) (cm) |
| 1-1 | 6.217 | 7.763 | 8.744 | 26.00 | 57.80 | 27.10 | (-1.8027，0.5438) |
| 2-2 | 6.492 | 7.697 | 9.082 | 30.86 | 58.61 | 26.13 | (-1.6986，0.3147) |
| 3-3 | 6.767 | 7.632 | 9.436 | 34.98 | 58.91 | 25.08 | (-1.5986，0.1219) |
| 4-4 | 7.042 | 7.565 | 9.779 | 38.446 | 60.36 | 24.76 | (-1.4852，0.0064) |
| 5-5 | 7.317 | 7.496 | 10.124 | 41.47 | 64.02 | 23.81 | (-1.3766，-0.031) |
| 6-6 | 7.592 | 7.423 | 10.439 | 44.024 | 69.79 | 23.54 | (-1.2591，0.0307) |
| 7-7 | 7.867 | 7.352 | 10.760 | 46.34 | 77.51 | 23.60 | (-1.1218，0.1614) |
| 8-8 | 8.075 | 7.300 | 10.982 | 47.84 | 83.82 | 23.83 | (-1.0198，0.3209) |
Claims (3)
1. press the sabre blade in a large steam turbine, comprise blade root, blade profile, shroud, it is characterized in that sound leaf blade profile is the variable cross section twisted blade, its circumferential skewing can be with the high corresponding circumferential translation of each cross section leaf of blade during blade forming; Blade root is a fir tree blade root, and side direction is installed; The leaf top is the integral (tip) shroud form.
2. press the sabre blade in the large steam turbine according to claim 1, the circumferential skewing that it is characterized in that sound leaf blade profile variable cross section twisted blade is approximately curved 10 degree in top, curved 15 degree of root.
3. press the sabre blade in the large steam turbine according to claim 1, it is characterized in that the blade applications height from 160～215mm, 25～50 ° of each cross section established angles, axial width 78～73mm, 55～58 ° of bottom section inlet angles scopes, 83～89 ° of top cross-section inlet angles range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520048083 CN2921294Y (en) | 2005-12-28 | 2005-12-28 | Large power turbine medium-pressure horsepower blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520048083 CN2921294Y (en) | 2005-12-28 | 2005-12-28 | Large power turbine medium-pressure horsepower blade |
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| Publication Number | Publication Date |
|---|---|
| CN2921294Y true CN2921294Y (en) | 2007-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520048083 Expired - Lifetime CN2921294Y (en) | 2005-12-28 | 2005-12-28 | Large power turbine medium-pressure horsepower blade |
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| CN (1) | CN2921294Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605540A (en) * | 2017-09-18 | 2018-01-19 | 东方电气集团东方汽轮机有限公司 | Double split flow turbine enters vapour flow-guiding structure |
| CN114483204A (en) * | 2021-12-29 | 2022-05-13 | 东方电气集团东方汽轮机有限公司 | Quiet leaf suitable for radial-axial upright non-perpendicular admits air |
-
2005
- 2005-12-28 CN CN 200520048083 patent/CN2921294Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605540A (en) * | 2017-09-18 | 2018-01-19 | 东方电气集团东方汽轮机有限公司 | Double split flow turbine enters vapour flow-guiding structure |
| CN107605540B (en) * | 2017-09-18 | 2020-01-31 | 东方电气集团东方汽轮机有限公司 | Double-split-flow turbine steam inlet flow guide structure |
| CN114483204A (en) * | 2021-12-29 | 2022-05-13 | 东方电气集团东方汽轮机有限公司 | Quiet leaf suitable for radial-axial upright non-perpendicular admits air |
| CN114483204B (en) * | 2021-12-29 | 2023-07-14 | 东方电气集团东方汽轮机有限公司 | Stationary blade suitable for radial-axial vertical non-vertical air inlet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang: 201100 Patentee after: Shanghai Electric Station Equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Patentee before: Shanghai Steam Turbine Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070711 |
|
| EXPY | Termination of patent right or utility model |