CN203296828U - Low-pressure stationary-blade partition board of improved 300MW turbine - Google Patents
Low-pressure stationary-blade partition board of improved 300MW turbine Download PDFInfo
- Publication number
- CN203296828U CN203296828U CN2013203479269U CN201320347926U CN203296828U CN 203296828 U CN203296828 U CN 203296828U CN 2013203479269 U CN2013203479269 U CN 2013203479269U CN 201320347926 U CN201320347926 U CN 201320347926U CN 203296828 U CN203296828 U CN 203296828U
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- China
- Prior art keywords
- blade
- blade profile
- profile
- partition board
- stationary
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000005192 partition Methods 0.000 title abstract 4
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000007634 remodeling Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005255 carburizing Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a low-pressure stationary-blade partition board of an improved 300MW turbine. The partition board is formed by a plurality of stationary blades in a welded mode. Each stationary blade comprises a blade root, a blade profile and a shroud ring. Each blade root is provided with an annular groove, and each blade profile is a bowed and twisted blade profile. The outer surface of each blade profile further comprises a high-carbon layer, wherein the thickness of each high-carbon layer is 0.5-0.6mm. Each blade root is provided with one annular groove, and accordingly machining and assembling can be easily and conveniently carried out; each blade profile is the bowed and twisted blade profile which undergoes surface carburizing treatment, good blade strength and pneumatic performance are achieved, and the problem that a stationary-blade partition board is damaged due to water washout is reduced.
Description
Technical field
The utility model relates to the steam turbine field, especially low pressure stator blade dividing plate.
Background technique
Along with China enters WTO, the competition that faces the world, Domestic market is more and more fierce, and global energy constantly consumes, and it is more and more in short supply that the global reserves energy becomes.Energy-saving and emission-reduction, sustainable development have become global main flow.In today of Chinese national economy develop rapidly, the development of resource utilization and national economy is closely related how rationally, efficiently, utilize resource, has become the key issue of national economy sustainable development, improves resource utilization very urgent.
According to the State Council " energy development " 12 " planning ", CO2 emission will descend 17%, and every kilowatt hour coal electricity sulfur dioxide, discharged nitrous oxides drop to 1.5 grams, and PM2.5 discharging intensity descends more than 30%.The little fired power generating unit of high energy consumption high pollution will progressively be closed down, and will close down 8,400 ten thousand kilowatts of left and right of little fired power generating unit in 5 years, and during " 12 ", the whole nation will increase 300,000,000 kilowatts of coal group of motors newly, and the 300MW unit will account for 34% left and right.300MW grade unit accounts in China's total installed capacity of electricity capacity proportion is with increasing, adopt the technology of the seventies and eighties due to former unit more, the thermal efficiency is low, carbon nitrogenize and the thing discharge amount is high, working life is short, therefore 300MW and above unit also face update,, to improve resource utilization, reduce carbon nitrogenize and thing discharge amount.
The stator blade dividing plate of present 300MW grade unit due to the effect of high-intensity power with contact with corrosive liquids for a long time, the working life of stator blade dividing plate is generally not long, has affected Economy and the Security of steam turbine; Too complicated in processing and location and installation simultaneously.
The model utility content
Goal of the invention: the purpose of this utility model, in order to overcome the deficiencies in the prior art, provides a kind of 300MW remodeling steam turbine low-pressure stator blade dividing plate, and processing is simple, and is easy to assembly, and improved intensity and the corrosion resistance of stator blade dividing plate.
Technological scheme: for solving the problems of the technologies described above, the utility model adopts following scheme:
300MW remodeling steam turbine low-pressure stator blade dividing plate, be welded to form by several stator blades, and described stator blade has comprised blade root, blade profile and shroud, and described blade root is provided with annular groove, and blade profile is the bending blade profile.
Wherein, the outer surface of described blade profile has also comprised high carbon-coating.
Wherein, the thickness of described high carbon-coating is 0.5-0.6mm.
Beneficial effect: the utility model blade root is provided with annular groove, is convenient to processing and assembles simple and easy; Blade profile is the bending blade profile of processing through case-carbonizing, has good blade strength and good aeroperformance, has alleviated again the erosion of stator blade dividing plate water and has damaged problem.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of stator blade.
Fig. 3 is the schematic diagram of stator blade blade profile.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done further and explained.
In conjunction with Fig. 1 to Fig. 3, the utility model is welded to form by several stator blades 2, and described stator blade 2 has comprised blade root 3, blade profile 4 and shroud 5, and described blade root 3 is provided with annular groove 7, and blade profile is the bending blade profile.Wherein, the outer surface of described blade profile 4 has also comprised high carbon-coating 6.
See figures.1.and.2, stator blade 2 adopts annular groove 7 location, and processing is simple, is convenient to location and installation and effective.With reference to Fig. 2 and Fig. 3, adopt carburizing tech to form high carbon-coating 6 on blade profile 4 surfaces, thickness is 0.5-0.6mm, then through induction hardening, low-temperature tempering, the tissue at refinement infiltration layer and close infiltration layer place, intensity and the corrosion resistance of increase stator blade.Blade profile 4 adopts complete three-dimensional bending blade profile, has good aeroperformance; Because the stator blade dividing plate made from conventional material easily is subject to the corrosion of steam impringement in the ingress of blade profile 4, and carburizing can be alleviated stator blade dividing plate water erosion damage problem, blade profile 4 ingress of reducing stator blade 2 suffer the consequence of water erosion, blade profile 4 corrosion resistances are far away higher than conventional material, so outer surface has the blade profile 4 of high carbon-coating 6 can overcome the shortcoming of present stator blade.The application of this Series Blade will improve the working life of 300MW steam turbine low-pressure stator blade dividing plate, make the 300MW steam turbine have good Security and Economy.
With reference to Fig. 2, shroud 5 is the integral (tip) shroud form, can increase the stator blade bulk strength, after whole circle stator blade 2 assemblings are complete, shroud 5 car loads can be fitted in labyrinth gland with labyrinth strip, reduces the interstage leakage loss.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1.300MW remodeling steam turbine low-pressure stator blade dividing plate, it is characterized in that: by several stator blades (2), be welded to form, described stator blade (2) comprises blade root (3), blade profile (4) and shroud (5), and described blade root (3) is provided with annular groove (7), and blade profile (4) is the bending blade profile.
2. 300MW according to claim 1 remodeling steam turbine low-pressure stator blade dividing plate, it is characterized in that: the outer surface of blade profile (4) also comprises high carbon-coating (6).
3. 300MW according to claim 2 remodeling steam turbine low-pressure stator blade dividing plate, it is characterized in that: the thickness of described high carbon-coating (6) is 0.5-0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203479269U CN203296828U (en) | 2013-06-17 | 2013-06-17 | Low-pressure stationary-blade partition board of improved 300MW turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203479269U CN203296828U (en) | 2013-06-17 | 2013-06-17 | Low-pressure stationary-blade partition board of improved 300MW turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203296828U true CN203296828U (en) | 2013-11-20 |
Family
ID=49572844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203479269U Expired - Fee Related CN203296828U (en) | 2013-06-17 | 2013-06-17 | Low-pressure stationary-blade partition board of improved 300MW turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203296828U (en) |
-
2013
- 2013-06-17 CN CN2013203479269U patent/CN203296828U/en not_active Expired - Fee Related
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |
|
| CU01 | Correction of utility model | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: On July 4, 2023, the expiration and termination of the 39 volume 2701 patent Number: 27-01 Volume: 39 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 |