CN201851165U - High, medium and low pressure cylinder stationary blades for supercritical steam turbine unit - Google Patents
High, medium and low pressure cylinder stationary blades for supercritical steam turbine unit Download PDFInfo
- Publication number
- CN201851165U CN201851165U CN2010205011673U CN201020501167U CN201851165U CN 201851165 U CN201851165 U CN 201851165U CN 2010205011673 U CN2010205011673 U CN 2010205011673U CN 201020501167 U CN201020501167 U CN 201020501167U CN 201851165 U CN201851165 U CN 201851165U
- Authority
- CN
- China
- Prior art keywords
- blade
- medium
- turbine unit
- low pressure
- pressure cylinder
- Prior art date
- 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
Links
Images
Abstract
The utility model relates to high, medium and low pressure cylinder stationary blades for a supercritical steam turbine unit, which comprises a blade root, a blade profile and a shroud band; the high, medium and low pressure cylinder stationary blades are characterized in that the cross section of the blade root is T-shaped in the length direction; the blade profile takes the three-dimensional integral torsional curved shape; and a blade tip adopts an integral shroud band form with small dynamic stress and good high-temperature resistance creep properties. The utility model has the characteristics that the high, medium and low pressure cylinder stationary blades all adopt the three-dimensional integral torsional curved blade profiles, the blade is circumferentially bent, substantially, a new design freedom is increased and reasonably matched with the original changeable angle distortion in the height of the blade, and the flow field is further optimized, so that the loss of secondary flow at the end is reduced, the generating efficiency of the supercritical steam turbine unit is effectively improved, and the stage efficiency is improved by 1.5-2 percent than that of the traditional straight and twisted blade grids.
Description
One, technical field
The utility model relates to 660,000 kilowatts of high, medium and low cylinder pressure stator blades of supercritical pressure turbine unit.
Two, background technique
The appearance of steam turbine has promoted development of electric power industry, and it all is widely used in socioeconomic all departments.Entered since 21 century, Chinese power generating equipment manufacturing industry enters Rapid development stage, and the thermal power generating equipment production technology makes substantial progress, and the fired power generating unit production capacity progressively promotes, and the production domesticization degree improves constantly.According to China's energy resource structure characteristics, in the following quite a long time, be that the thermal power generation of main fuel still is the main flow of power generation industries with coal.
In recent years, the thermoelectricity industry was actively pushed forward the upgrading and optimization of industrial structure under the policy guidance of " it is little to go up big pressure ", and the maximization of thermoelectricity project makes high-end thermal power generating equipment welcome development opportunity, and large electric power plant equipment such as supercritical steam turbine unit become the emphasis of development.Close the little fired power generating unit that large quantities of efficiencies are low, pollution is heavy, accelerated the update of domestic thermal power generating equipment to a great extent, the pulling thermal power generating equipment market demand.In order to solve the problem that the thermal power generation wasting of resources is big, toxic emission is serious, building the supercritical parameter unit is the inexorable trend of electric power industry development.Supercritical unit efficient is example than improving 2-2.4% with the capacity Subcritical Units with 600,000 kilowatts of units, and supercritical unit can be saved about 2.5 ten thousand tons of standard coals than Subcritical Units every year.The dynamic and static blade of steam turbine is the core component that constitutes stage, mostly existing high, medium and low cylinder pressure blade is to adopt prismatic blade, twisted blade, its end secondary flow loss is bigger, so that the efficient of the high, medium and low cylinder pressure of supercritical unit can not get effective raising always, has had a strong impact on the thermal performance of steam turbine.
Three, summary of the invention
The purpose of this utility model is: provide a kind of 660,000 kilowatts of supercritical pressure turbine units high, medium and low cylinder pressure stator blade, this high, medium and low cylinder pressure stator blade can effectively reduce the blade tip secondary flow loss, improves high, medium and low cylinder pressure pneumatic efficiency.
The utility model is achieved in that this 660,000 kilowatts of supercritical pressure turbine units, 195 high, medium and low cylinder pressure stator blades, comprise blade root, blade profile, shroud, it is characterized in that: blade root cross section along its length is "T"-shaped and " L " shape, blade profile is for adopting complete three-dimensional viscosity design philosophy, utilize advanced computer and experimental fluid mechanics technology three-dimension integrally torsional bending blade profile for the basis, the leaf top is little for dynamic stress, the integral (tip) shroud form that high temperature creep-resisting is good.
Above-mentioned 660,000 kilowatts of supercritical pressure turbine units, 195 high, medium and low cylinder pressure stator blades, the blade profile width of blade is: 24～119mm, the steam passage length of blade is 53～274mm.
Because of blade is long-term work under high temperature, high pressure or certain temperature difference, pressure difference effect, its operating conditions is abominable, the stressing conditions complexity, as long as there is a slice leaf destruction will cause extremely serious accident, in order to guarantee blade Security in use, the material of this Series Blade has adopted resistant to elevated temperatures X20Cr13 (950 ℃-1000 ℃ of Quenching Treatment), X12CrMoWVNbN (1050 ℃-1100 ℃ of Quenching Treatment), X19CrMoNbVN (1100 ℃-1130 ℃ of Quenching Treatment) material, its tensile strength: 800～1050Mpa; Yield strength: 750～830Mpa reduction of cross sectional area 〉=40～55%; Specific elongation 〉=12～15%; Impact value 〉=20～50J; Hardness 265～310HB.
The utility model characteristics are: height, in, the low pressure stator blade all adopts three-dimension integrally torsional bending blade profile, blade is along circumferential skewing, come down to increase a new design freedom, it and original in the high varied angle distortion of leaf rational Match, the flow field is further optimized, this blade profile radially forms C shape pressure distribution (pressure two ends height, middle low), steam flow is by two side direction intermediate flow and import main flow, thereby make boundary layer, two ends attenuate, significantly reduced the end secondary flow loss, effectively improved the generating efficiency of supercritical unit, its stage efficiency is more straight than tradition, turn round leaf grating and improve 1.5%～2%.
Four, description of drawings
Fig. 1 is a high, medium and low voltage stator blade three-dimension integrally torsional bending blade profile graphics
Fig. 2 is a high, medium and low voltage stator blade front view
Fig. 3 is a high, medium and low voltage stator blade right elevation
Fig. 4 is the diverse location sectional view of the utility model high, medium and low voltage stator blade blade profile
Fig. 5 is " L " shape blade root figure
Among the figure: 1 is blade root, and 2 is blade profile, and 3 is shroud
Five, embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.The high, medium and low cylinder pressure stator blades of 660,000 kilowatts of supercritical pressure turbine units of the utility model (195 type), its form is formed (referring to Fig. 2, Fig. 3, Fig. 5) by blade root 1, blade profile 2, shroud 3 three parts.
Referring to Fig. 1, Fig. 3, Fig. 4, this kind stator blade blade profile 2 all adopts three-dimension integrally torsional bending blade profiles, can be clearly seen that from Fig. 4 this blade profile is in the high upper edge of respective leaves circumferentially to develop on (Y to) basis of doing translation at each cross section molded lines of twisted blade.This kind blade profile has come down to increase a new design freedom, it and original in the high varied angle distortion of leaf rational Match, the flow field is further optimized.Visible blade is along circumferential crooked rule from Fig. 1, Fig. 3, crooked rule by blade, make radially (length direction) formation C shape pressure distribution (pressure two ends height of blade profile, middle low), steam flow is by two side direction intermediate flow and import main flow, reduces steam flow flowing to blade root, shroud end face, thereby make boundary layer, two ends attenuate, not only significantly reduce the end secondary flow loss, also help the three-dimensional flow field that improves leaf grating inside simultaneously, effectively improve the generating efficiency of supercritical unit.Provide cross section 4, blade root place, intermediate cross-section 5, cross section, shroud place 6 among Fig. 4.
Referring to Fig. 2, Fig. 3, the high, medium and low cylinder pressure stator blade of this kind profile width is: 24～119mm, blade steam passage length is 53～274mm.
Referring to Fig. 2, Fig. 5, blade root is "T"-shaped and " L " shape blade root.
Referring to Fig. 2, Fig. 3, the leaf top is the integral (tip) shroud form, and not only dynamic stress is little for this form shroud, high temperature creep-resisting is good, can increase the bulk strength of blade, also can be after the assembling of whole circle blade finishes, the whole circle of shroud finish turning is cooperated the formation labyrinth gland with labyrinth strip, reduce the interstage leakage loss.
660,000 kilowatts of supercritical pressure turbine units of the utility model, 195 high, medium and low cylinder pressure stator blades have good blade grid passage mobile performance, can significantly weaken the blade tip secondary flow loss, to improving leaf grating efficient remarkable effect are arranged.Its stage efficiency is more straight than tradition, turn round leaf grating improves 1.5%～2%.
Claims (3)
1. be used for the high, medium and low cylinder pressure stator blade of supercritical pressure turbine unit, comprise blade root, blade profile and shroud, it is characterized in that: described blade root cross section along its length is "T"-shaped, and blade profile is a three-dimension integrally torsional bending shape, and the leaf top is the integral (tip) shroud form.
2. the high, medium and low cylinder pressure stator blade that is used for the supercritical pressure turbine unit according to claim 1 is characterized in that the blade profile width of blade is: 24～119mm, the steam passage length of blade is 53～274mm.
3. the high, medium and low cylinder pressure stator blade that is used for the supercritical pressure turbine unit according to claim 1 is characterized in that blade along circumferential skewing, and blade profile radially forms C shape pressure distribution, and pressure is at the two ends height at nearly blade root, shroud place, and the blade profile intermediate pressure is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205011673U CN201851165U (en) | 2010-08-23 | 2010-08-23 | High, medium and low pressure cylinder stationary blades for supercritical steam turbine unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205011673U CN201851165U (en) | 2010-08-23 | 2010-08-23 | High, medium and low pressure cylinder stationary blades for supercritical steam turbine unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201851165U true CN201851165U (en) | 2011-06-01 |
Family
ID=44093564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205011673U Expired - Fee Related CN201851165U (en) | 2010-08-23 | 2010-08-23 | High, medium and low pressure cylinder stationary blades for supercritical steam turbine unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201851165U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557034A (en) * | 2013-09-30 | 2014-02-05 | 哈尔滨汽轮机厂有限责任公司 | Second stage guide vane applicable to turbine of heavy low calorific value fuel machine |
-
2010
- 2010-08-23 CN CN2010205011673U patent/CN201851165U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557034A (en) * | 2013-09-30 | 2014-02-05 | 哈尔滨汽轮机厂有限责任公司 | Second stage guide vane applicable to turbine of heavy low calorific value fuel machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201581936U (en) | Special last-stage vane for large-scale 60Hz turbine | |
| CN201581934U (en) | Half-speed high-capacity nuclear turbine last-stage movable blade | |
| CN103410779A (en) | Flow separation method for stationary cascade of high-load axial flow air compressor | |
| CN206129330U (en) | Quiet cascade of steam turbine and adopt its steam turbine | |
| CN102108881B (en) | Secondary final stage blade for half-RPM (Revolution per Minute) nuclear turbine | |
| CN106256993A (en) | A kind of final stage moving blade of feed pump industrial steam turbine | |
| CN201851165U (en) | High, medium and low pressure cylinder stationary blades for supercritical steam turbine unit | |
| CN102108882B (en) | Last stage blade for half speed nuclear power steam turbine | |
| CN102251812A (en) | 1800mm last-stage movable blade used on half-revolving speed nuclear turbine | |
| CN200961492Y (en) | Large scale full speed nuclear steam turbine second last stage blade | |
| CN2883679Y (en) | Final blade of large-scale air cooling turbine | |
| CN103628926A (en) | 3m<2>-steam-exhaust-area low-pressure stage set last stage blade of variable speed industrial steam turbine | |
| CN102979582A (en) | 712.5 mm last-stage moving blade used for high power combined-cycle steam turbine | |
| CN214035792U (en) | Impeller suitable for megawatt-level differential pressure power generation turboexpander | |
| CN201269220Y (en) | 50% reaction level and 80% reaction level combined work channel of axial flow compressor | |
| CN204113356U (en) | The level steam turbine dual row governing stage structures such as High Temperature High Pressure 25MW | |
| CN103557034B (en) | Second stage guide vane applicable to turbine of heavy low calorific value fuel machine | |
| CN201170120Y (en) | Large-scale supercritical, more supercritical air cooling steam turbine last stage blades | |
| CN109798215B (en) | Novel ultra-low specific speed water pump turbine | |
| CN202926400U (en) | Last-stage blade special for 60Hz turbine | |
| CN111828097A (en) | 2000mm last-stage moving blade for half-speed nuclear turbine | |
| CN204024720U (en) | For time time final stage moving blade of Half Speed Large Copacity nuclear steam turbine | |
| CN202108546U (en) | 1800 mm last stage rotor blade on half-speed nuclear turbine | |
| CN203476402U (en) | Second-stage guide blade for turbine of heavy low and medium calorific value gas turbine | |
| CN217735582U (en) | Novel high-pressure cylinder blade |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20130823 |