CN2851583Y - Penult-stage twisted blades of large-sized full-speed steam turbine - Google Patents
Penult-stage twisted blades of large-sized full-speed steam turbine Download PDFInfo
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- CN2851583Y CN2851583Y CN 200520022091 CN200520022091U CN2851583Y CN 2851583 Y CN2851583 Y CN 2851583Y CN 200520022091 CN200520022091 CN 200520022091 CN 200520022091 U CN200520022091 U CN 200520022091U CN 2851583 Y CN2851583 Y CN 2851583Y
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- blade
- steam turbine
- variable cross
- section twisted
- rotary speed
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Abstract
The utility model relates to a penultimate variable section twisted blade of a large-sized full speed steam turbine, which is a steam turbine blade. The utility model solves the problems that in the existing steam turbine blade, work efficiency is low; work process is unsafe; the assembly of the blade is inconvenient; the connection point of the blade and a surrounding belt is easily broken, and is composed of the surrounding belt 1, the blade 2, a waterproof brush 3, an intermediate body 4, a blade root 5 and a wheel rim 7 of an impeller, wherein the waterproof brush 3 is arranged at the air inlet side at the upper part of the blade 2, the upper part of the intermediate body 4 and the bottom of the blade 2 are connected into an integral body, and the lower part of the intermediate body 4 and the upper part of the blade root 5 are connected into the integral body. The surrounding belt 1 and the top of the blade 2 are integrated, the blade 2 is the variable section twisted blade, and the blade root 5 is inlaid and fixed in the wheel rim 7 of the impeller. Compared with the existing arched surrounding belt, the penultimate variable section twisted blade 2 of the utility model is self-contained with the surrounding belt. Assembly is convenient, and break is not easy. Through the design of an integral structure and the size of the blade 2, the safety and the high efficiency of the blade 2 are organically combined, and the blade 2 can safely run with high efficiency under variable working condition.
Description
Technical field
The utility model relates to turbine blade.
Background technique
At present, the power that the exhaust stage blade of steam turbine set sends only accounts for 1/10 of aggregate capacity, and along with the increase of thermal power steam turbine capacity, the long steam turbine second last stage blade of research and development has become development trend.Existing turbine blade is because the restriction of length of blade and its corresponding angle of swing, make its inefficiency, working procedure dangerous, and the assembling of existing turbine blade is complicated; Because the riveted structure that adopts between existing arched cover band and blade is concentrated so easily produce stress in riveted joint place, therefore has the defective of the joint easy-rupturing of shroud and blade.
The model utility content
There is inefficiency in existing turbine blade to the utility model, working procedure is dangerous and the problem of the joint easy-rupturing of blade assembling inconvenience and blade and shroud in order to solve, a kind of large-scale full rotary speed steam turbine time final stage variable cross section twisted blade is provided, and it is as follows to address the above problem the technological scheme that is adopted:
It is made up of a kind of large-scale full rotary speed steam turbine of the present utility model time final stage variable cross section twisted blade shroud 1, blade 2, waterproof brush 3, intermediate 4, blade root 5 and wheel rim 7, waterproof brush 3 is installed in the steam admission side on blade 2 tops, the bottom of the top of intermediate 4 and blade 2 is connected as a single entity, the top of the bottom of intermediate 4 and blade root 5 is connected as a single entity, shroud 1 is an one with the top of blade 2, blade 2 is the variable cross section twisted blade, and blade root 5 edges are solid in wheel rim 7.
Of the present utility model final stage variable cross section twisted blade 2 tops employing carries shroud and compares with existing arched cover band, easy to assembly, make blade 2 form whole circle connection by giving turning round to assemble, quality by increase and decrease shroud 1 can make pitch diameter count upper frequency increase or minimizing, whole and the frequency modulation of You Li Yu Tone, because shroud 1 and blade 2 are one, so do not exist the shroud 1 and the joint stress of blade 2 to concentrate the easy-rupturing problem that produces; The utility model is to the overall structure of the large-scale full rotary speed steam turbine second last stage blade 2 of 433mm and the design of size, make that the degree of reaction of second last stage blade 2 roots is controlled in 15～20% the scope, negative angle of attack is controlled at ± 5～10 ° scope in, thereby make the Security of clammy unit second last stage blade and high efficiency obtain organic combination, make the large-scale full rotary speed steam turbine second last stage blade 2 of 433mm that higher off design performance be arranged, thereby guarantee unit energy safety, operation efficiently under variable working condition.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present utility model, Fig. 2 is the left view of Fig. 1, Fig. 3 is the plan view of Fig. 1, Fig. 4 is the plan view of blade 2 molded lines part, Fig. 5 is the assembly structure schematic representation of 2 liang of working surface ab-cd of shroud 1 adjacent blades position, Fig. 6 is the structural representation that blade root 5 is riveted mutually by rivet 6 and wheel rim 7, and Fig. 7 is how much inlet angles schematic representation, and Fig. 8 is trailing edge thickness and established angle schematic representation.
B among the figure
1Be the axial width at blade 2 tops, B
2Be the axial width of blade 2 roots, H is the height of blade 2, and W is the axial width of blade root 5, and K is the height of blade root 5, and ab and cd are the working surfaces of shroud 1, β
yBe established angle, β
LjBe how much inlet angles, S is the non-working surface of shroud 1.
Embodiment
Embodiment one: present embodiment is made up of shroud 1, blade 2, waterproof brush 3, intermediate 4, blade root 5 and wheel rim 7, waterproof brush 3 is installed in the steam admission side on blade 2 tops, the bottom of the top of intermediate 4 and blade 2 is connected as a single entity, the top of the bottom of intermediate 4 and blade root 5 is connected as a single entity, shroud 1 is an one with the top of blade 2, blade 2 is the variable cross section twisted blade, and blade root 5 edges are solid in wheel rim 7.
Embodiment two: the shroud 1 of present embodiment is an one with the top die forging of blade 2, blade root 5 is embedded in the wheel rim 7, blade root 5 passes through rivet 6 rivet clasps on wheel rim 7, blade 2 makes blade 2 form whole circle connection by giving turning round to assemble, have relatively between adjacent two sections and reverse, the working depth H of blade 2 molded lines part is 0～433mm, and blade 2 is the frustum shape, the axial width B1 at blade 2 tops is 46.612mm, and the axial width B2 of root is 68.000mm; Blade root 5 is four forked type equal strength blade roots, and the axial width W of blade root 5 is 97.5mm, and the height K of blade root 5 is 88mm.Matching gap between adjacent blades 2 and the shroud 1, as shown in Figure 5, the working surface ab of shroud 1 adopts " 0 " Spielpassung to become working surface 1-1 with the working surface cd of shroud 1 during blade 2 assemblings, and the fit up gap of the non-working surface S of shroud 1 is 0.4～0.6mm.
By above-mentioned to the overall structure of the large-scale full rotary speed steam turbine of 433mm time final stage variable cross section twisted blade 2 and the design of size, make that the degree of reaction of second last stage blade 2 roots is controlled in 15～20% the scope, negative angle of attack is controlled at ± 5～10 ° scope in, thereby make the Security of clammy unit second last stage blade and high efficiency obtain organic combination, make the large-scale full rotary speed steam turbine second last stage blade 2 of 433mm that higher off design performance be arranged, thereby guarantee unit energy safety, operation efficiently under variable working condition.
Embodiment three: in conjunction with Fig. 1～Fig. 8, the working depth H of described blade 2 molded lines of present embodiment part is 0～433mm, the axial width of blade 2 from 68mm～46.612mm, chord length from 68.727mm～78.017mm, how much inlet angles do corresponding the variation from 23.829mm～6.043mm and trailing edge thickness from 30.2 °～103.098 °, established angle from 82.714 °～36.975 °, molded lines thickness in the scope of 1.256mm～1.046mm.
Embodiment four: the difference of present embodiment and embodiment two is when blades height is the 17mm place, and corresponding axial width is that 67.168mm, chord length are that 68.212mm, how much inlet angles are that 30.67384 °, established angle are that 80.7702 °, molded lines thickness are that 22.7832mm, trailing edge thickness are 1.256mm (seeing Table one).
Embodiment five: the difference of present embodiment and embodiment two is when blades height is the 162.7mm place, and corresponding axial width is that 60.022mm, chord length are that 68.047mm, how much inlet angles are that 48.50503 °, established angle are that 62.5235 °, molded lines thickness are that 18.3198mm, trailing edge thickness are 1.150mm (seeing Table one).
Embodiment six: the difference of present embodiment and embodiment two is when blades height is the 315mm place, and corresponding axial width is that 52.556mm, chord length are that 71.9775mm, how much inlet angles are that 74.0331 °, established angle are that 47.1001 °, molded lines thickness are that 9.7466mm, trailing edge thickness are 1.046mm (seeing Table one).
Embodiment seven: the difference of present embodiment and embodiment two is when blades height is the 390mm place, and corresponding axial width is that 48.879mm, chord length are that 76.289mm, how much inlet angles are that 97.0880 °, established angle are that 40.3934 °, molded lines thickness are that 7.1782mm, trailing edge thickness are 1.046mm (seeing Table one).
Table one, the concrete parameter list in blade 2 each cross section:
| E-E | 112 | 62.510 | 67.4685 | 26.4401 | 42.3981 | 68.5689 | 20.1534 | 1.256 |
| F-F | 162.7 | 60.022 | 68.0471 | 25.8655 | 48.5050 | 62.5235 | 18.3198 | 1.150 |
| G-G | 212 | 57.605 | 69.6444 | 26.0715 | 47.5976 | 57.1526 | 16.5775 | 1.150 |
| I-I | 262 | 55.155 | 70.3571 | 26.0789 | 59.5263 | 52.0324 | 12.8767 | 1.046 |
| K-K | 315 | 52.556 | 71.9775 | 26.0015 | 74.0331 | 47.1001 | 9.7466 | 1.046 |
| L-L | 327 | 51.968 | 72.3901 | 26.0382 | 77.2728 | 46.0373 | 9.0191 | 1.046 |
| M-M | 350 | 50.840 | 73.3157 | 26.1290 | 83.6419 | 44.0222 | 7.6935 | 1.046 |
| N-N | 390 | 48.879 | 76.2893 | 25.3186 | 97.0880 | 40.3934 | 7.1782 | 1.046 |
| W-W | 433 | 46.612 | 78.0172 | 24.7900 | 103.0981 | 36.9753 | 6.0426 | 1.046 |
Claims (8)
1, a kind of large-scale full rotary speed steam turbine time final stage variable cross section twisted blade, it is made up of shroud (1), blade (2), waterproof brush (3), intermediate (4), blade root (5) and wheel rim (7), waterproof brush (3) is installed in a side on blade (2) top, the bottom of the top of intermediate (4) and blade (2) is connected as a single entity, the top of the bottom of intermediate (4) and blade root (5) is connected as a single entity, it is characterized in that the shroud (1) and the top of blade (2) are one, blade (2) is the variable cross section twisted blade, and blade root (5) edge is solid in wheel rim (7).
2, a kind of large-scale full rotary speed steam turbine according to claim 1 time final stage variable cross section twisted blade, it is characterized in that the shroud (1) and the top die forging of blade (2) are one, blade root (5) is embedded in the wheel rim (7), blade root (5) coexists by rivet (6) riveting on the wheel rim (7), blade (2) makes blade (2) form whole circle connection by giving turning round to assemble, have relatively between adjacent two sections and reverse, the working depth H of blade (2) molded lines part is 0～433mm, and blade (2) is the frustum shape.
3, a kind of large-scale full rotary speed steam turbine according to claim 1 and 2 time final stage variable cross section twisted blade is characterized in that blade root (5) is four forked type equal strength blade roots, and the axial width of blade root (5) is 97.5mm, and the height of blade root (5) is 88mm.
4, a kind of large-scale full rotary speed steam turbine according to claim 1 and 2 time final stage variable cross section twisted blade, the axial width that it is characterized in that blade (2) at 68mm～46.612mm, chord length from 68.727mm～78.017mm, how much inlet angles from 30.2 °～103.098 °, established angle from 82.714 °～36.975 °, molded lines thickness from 23.829mm～6.043mm and trailing edge thickness from the scope of 1.256mm～1.046mm.
5, a kind of large-scale full rotary speed steam turbine according to claim 4 time final stage variable cross section twisted blade, it is characterized in that when blades height is the 17mm place, axial width is 67.168mm, chord length is 68.212mm, how much inlet angles are 30.67384 °, established angle is 80.7702 °, and molded lines thickness is 22.7832mm, and trailing edge thickness is 1.256mm.
6, a kind of large-scale full rotary speed steam turbine according to claim 4 time final stage variable cross section twisted blade, it is characterized in that when blades height is the 162.7mm place, axial width is 60.022mm, chord length is 68.047mm, how much inlet angles are 48.50503 °, established angle is 62.5235 °, and molded lines thickness is 18.3198mm, and trailing edge thickness is 1.150mm.
7, a kind of large-scale full rotary speed steam turbine according to claim 4 time final stage variable cross section twisted blade, it is characterized in that when blades height is the 315mm place, axial width is 52.556mm, chord length is 71.9775mm, how much inlet angles are 74.0331 °, established angle is 47.1001 °, and molded lines thickness is 9.7466mm, and trailing edge thickness is 1.046mm.
8, a kind of large-scale full rotary speed steam turbine according to claim 4 time final stage variable cross section twisted blade, it is characterized in that when blades height is the 390mm place, axial width is 48.879mm, chord length is 76.289mm, how much inlet angles are 97.0880 °, established angle is 40.3934 °, and molded lines thickness is 7.1782mm, and trailing edge thickness is 1.046mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520022091 CN2851583Y (en) | 2005-12-06 | 2005-12-06 | Penult-stage twisted blades of large-sized full-speed steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520022091 CN2851583Y (en) | 2005-12-06 | 2005-12-06 | Penult-stage twisted blades of large-sized full-speed steam turbine |
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| Publication Number | Publication Date |
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| CN2851583Y true CN2851583Y (en) | 2006-12-27 |
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| CN 200520022091 Expired - Lifetime CN2851583Y (en) | 2005-12-06 | 2005-12-06 | Penult-stage twisted blades of large-sized full-speed steam turbine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839990A (en) * | 2011-06-21 | 2012-12-26 | 阿尔斯通技术有限公司 | Turbine airfoil of composite material and method of manufacturing thereof |
| CN108590775A (en) * | 2018-02-11 | 2018-09-28 | 杭州汽轮机股份有限公司 | A kind of efficient governing-stage moving blade of big load of industrial steam turbine |
-
2005
- 2005-12-06 CN CN 200520022091 patent/CN2851583Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839990A (en) * | 2011-06-21 | 2012-12-26 | 阿尔斯通技术有限公司 | Turbine airfoil of composite material and method of manufacturing thereof |
| CN102839990B (en) * | 2011-06-21 | 2015-09-30 | 阿尔斯通技术有限公司 | The method of the blade of turbine blade and manufacture Large steam turbine |
| US9587497B2 (en) | 2011-06-21 | 2017-03-07 | General Electric Technology Gmbh | Turbine airfoil of composite material and method of manufacturing thereof |
| US10072505B2 (en) | 2011-06-21 | 2018-09-11 | General Electric Technology Gmbh | Turbine airfoil of composite material and method of manufacturing thereof |
| CN108590775A (en) * | 2018-02-11 | 2018-09-28 | 杭州汽轮机股份有限公司 | A kind of efficient governing-stage moving blade of big load of industrial steam turbine |
| CN108590775B (en) * | 2018-02-11 | 2023-11-28 | 杭州汽轮动力集团股份有限公司 | Industrial steam turbine high-load efficient regulation stage moving blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061227 |
|
| EXPY | Termination of patent right or utility model |