CN106089314B - Leaving area 3.2m2The low-pressure stage group final stage moving blade of efficient industrial steam turbine - Google Patents
Leaving area 3.2m2The low-pressure stage group final stage moving blade of efficient industrial steam turbine Download PDFInfo
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- CN106089314B CN106089314B CN201610619739.XA CN201610619739A CN106089314B CN 106089314 B CN106089314 B CN 106089314B CN 201610619739 A CN201610619739 A CN 201610619739A CN 106089314 B CN106089314 B CN 106089314B
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- blade
- section
- root
- lacing wire
- steam turbine
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
- F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Leaving area 3.2m designed by the present invention2The low-pressure stage group final stage moving blade of efficient industrial steam turbine is a kind of variable cross-section twisted blade, is made up of blade, blade root and the lacing wire boss being arranged on blade.Blade working part is that blade is variable cross-section twisted blade, coincided and formed by specific rule by some characteristic cross-sections, the profile molded line of characteristic cross-section is by inner arc curve and carries on the back the closed curve that curved line is surrounded, the rule that coincides in section is excessive along the high direction of leaf from each section continuous and derivable in root to top, it is gradually reduced from the area of section at root to top, there is relative torsion between adjacent two sections, the leaving area of this industrial steam turbine low-pressure stage group exhaust stage blade is 3.2m2, available for the industrial turbine unit of 150,000 kilowatts of grades, for level Four low-pressure stage group final stage, can be run in larger back pressure ranges, with efficient variable parameter operation performance, improve combined cycle efficiency.
Description
Technical field
It is 3.2m the present invention relates to a kind of final stage moving blade of combined cycle industrial steam turbine, particularly leaving area2
During variable parameter operation, low-pressure stage group final stage moving blade of the pneumatic efficiency more than 88.9%.
Background technology
The development of combustion engine-Steam Combined Cycle is very rapid, design, the manufacture of the steam turbine matched with gas turbine
Also it is determined to win.To improve combined cycle efficiency, its efficient Turbine Blade Design gradually shows its importance especially.Combined cycle
High-performance during variable parameter operation should be met with the low-pressure stage group exhaust stage blade of steam turbine, meets strong under bad working environments again
Degree vibration requires that the design of exhaust stage blade is most important.
The content of the invention
It is an object of the invention to provide a kind of leaving area 3.2m2The low-pressure stage group exhaust stage blade of efficient industrial steam turbine,
The blade has good variable working condition aeroperformance and strength character, rational in infrastructure, easy to assembly.
Leaving area 3.2m designed by the present invention2The low-pressure stage group final stage moving blade of efficient industrial steam turbine is a kind of change
Section twisted blade, is made up of blade, blade root and the lacing wire boss being arranged on blade.Blade working part is that blade is variable cross-section
Twisted blade, is coincided by specific rule by some characteristic cross-sections and formed, and the profile molded line of characteristic cross-section is by inner arc curve and back of the body arc
The closed curve that curve is surrounded, the rule that coincides in section be along the high direction of leaf from each section continuous and derivable in root to top excessively,
It is gradually reduced from the area of section at root to top, there is relative torsion between adjacent two sections, blade Ld high with respect to leaf is dull by 0%
Increase to 100%, the pitch to chord length from blade root section to leaf top section is than T/b changing rule：0.38≤T/b≤0.91；
Pitch from blade root section to leaf top section is than T/B changing rule with blade profile section axial width：0.39≤T/B≤1.26；
Pitch from blade root section to leaf top section is than T/Dmax changing rule with blade profile section maximum gauge：2.44≤T/Dmax≤
15.30；Pitch from blade root section to leaf top section is than T/A changing rule with blade profile area of section：0.02≤T/A≤
0.12；Blade profile leading-edge radius R0 changing rules from blade root section to leaf top section are：2.03mm≤R0≤4.04mm；From blade root
The blade profile trailing edge radius R1 changing rules of section to leaf top section are：1.01mm≤R1≤2.03mm.
Further scheme is that described blade is highly 560mm.Blade root axial width is 149.37mm, root
A diameter of 1120mm, top axial width is 93.61mm, and the leaving area of blade is 3.2m2.The blade root is fir-tree type, leaf
Root axial width is 160mm.Blade root is fir-tree root, and the axial width of blade root is 160mm.
Further scheme is, lacing wire boss is located at blade working part from bottom to up at high with respect to leaf 0.625, and with
Blade working is partially fabricated one；And lacing wire boss is provided with lacing hole, blade lacing boss section is circle, is in blade work
Make the interior of part, evagination formation boss structure in convex surface, the inner arc working face and back of the body arc working face of lacing wire boss are parallel to each other,
Lacing wire boss centre-to-centre spacing blade bottom 350mm, the inner arc working face of lacing wire boss is 26mm with the distance between arc working face is carried on the back,
The a diameter of 14mm of lacing hole；；Provided with hardening part at blade leading edge back of the body arc, the length of part of hardening regard actual use situation and
It is fixed.
The invention has the advantages that：
The leaving area of industrial steam turbine low-pressure stage group exhaust stage blade of the present invention is 3.2m2, available for 150,000 kilowatts of grades
Industrial turbine unit, for level Four low-pressure stage group final stage, can be run in larger back pressure ranges, with efficient variable working condition
Runnability, improves combined cycle efficiency.The present invention has to the economical and security reliability for improving industrial steam turbine
Important meaning.
What the exhaust stage blade was designed using ternary flow field designing technique, there is certain distortion along the high direction blade of leaf
Rule, had both taken into account the requirement of blade static strength, also caused blade to have good aeroperformance, blade distortion rule is according to three
Flow filament Theoretical Design, along each thermal parameter regularity of distribution of blade rationally, through professional computational fluid dynamics software for calculation CFX and
Numeca etc. calculate checking, back pressure be 0.09bar, outflow for 57.4kg/s design conditions under, the low-pressure stage group at place
Pneumatic efficiency up to 90.3%；And back pressure be 0.05-0.25bar in the range of, its pneumatic efficiency more than 88.9%,
With good off design performance；Show that the blade profile has additionally by conventional stress analysis and three-dimensional finite element intensive analysis
Gas-flow bending stress under enough strength characters, each operating mode is smaller.The exhaust stage blade uses the structure of boss tie pieces, impeller rotation
Blade twist caused by centrifugal force forms the whole multigroup blade construction of circle in the presence of lacing wire when turning.Shaken this structure eliminates a variety of
The vibration frequency of type, makes Turbine Blade Vibration Mode Shape relatively easy, greatly reduces the dynamic stress of blade, is conducive to dynamic frequency modulation, it is ensured that
Can safe and reliable operation under various working.The blade root part is fir-tree type tilted blade root, and blade-root molded line is using advanced
Three-dimensional structure optimization method is obtained, and bearing capacity is strong, and each tooth carrying is uniform, and blade and rotor can be made to be firmly combined with, stably, it is ensured that
The security of whole blade, the blade can under back pressure 0.05bar~0.25bar safe operation, should with wide market
Use prospect.
Brief description of the drawings
Fig. 1 is the structural representation of blade of the present invention；
Fig. 2 is Ld sections high with respect to leaf blading nomenclature figure at blade Fig. 1 E-E of the present invention；
Fig. 3 is blade side view of the present invention；
Fig. 4 is blade top view of the present invention；
Fig. 5 is vane type line schematic diagram of the present invention；
Fig. 6 is the schematic diagram that adjacent three blades are connected with lacing wire；
In figure：Blade 1, lacing wire boss 2, blade root 3, lacing wire 4.H is blade and blade height degree in Fig. 1, and Ld is that blade is relatively high
Degree, L is length of being hardened at leading edge back of the body arc.A is hatched region area in Fig. 2.A-A, E-E, I-I are respectively relative in Fig. 5
Blade is highly 0%, 50%, 100% corresponding vane type line；
Embodiment
Below by embodiment combination accompanying drawing, the invention will be further described.
As shown in Figure 1,2,3, 4, the leaving area 3.2m described by the present embodiment2The low-pressure stage group of efficient industrial steam turbine
Exhaust stage blade, it is a kind of variable cross-section twisted blade, including blade 1, blade root 3 and the lacing wire boss 2 that is arranged on blade 1.Blade
Part is variable cross-section twisted blade, is coincided and formed by specific rule by some characteristic cross-sections, the profile molded line of characteristic cross-section is by interior
Curved line and the closed curve for carrying on the back curved line besieged city, the rule that coincides in section is connected along the high direction of leaf from each section in root to top
It is continuous smooth excessive, it is gradually reduced from the area of section at root to top, has relative torsion between adjacent two sections, see Fig. 4.
The height of blade 1 is 560mm, and blade root axial width is 149.37mm, and root diameter (RD) is 1120mm, top
Axial width is 93.61mm, and the leaving area of blade is 3.2m2.Its relative altitude Ld monotonicallys increase up to 100% by 0%, from leaf
The pitch to chord length of root section to leaf top section than T/b changing rule is：0.38≤T/b≤0.91；From blade root section to leaf top
The pitch in section is than T/B changing rule with blade profile section axial width：0.39≤T/B≤1.26；From blade root section to leaf top
The pitch in section is than T/Dmax changing rule with blade profile section maximum gauge：2.44≤T/Dmax≤15.30；From blade root section
Pitch to leaf top section with blade profile area of section is than T/A changing rule：0.02≤T/A≤0.12；From blade root section to leaf
The blade profile leading-edge radius R0 changing rules of top section are：2.03mm≤R0≤4.04mm；Leaf from blade root section to leaf top section
Type trailing edge radius R1 changing rules are：1.01mm≤R1≤2.03mm.
The blade root 3 is fir-tree root 3, and the axial width of blade root 3 is 160mm, and blade is arranged on by fir-tree root
In the cylindrical impeller groove of rotating shaft；The lacing wire boss 2 is located at blade working part from bottom to up at high relative to leaf 0.625, and
One is partially fabricated with blade working, and lacing wire boss and provided with lacing hole.Lacing wire boss section is circle, is in blade work
Make the interior of part, evagination formation boss structure in convex surface, the inner arc working face and back of the body arc working face of lacing wire boss are mutually put down
OK.；The lacing wire bore dia 14mm, away from the bottom 350mm of blade 1, between the inner arc working face and back of the body arc working face of lacing wire boss
Distance be 26mm, lacing hole assembling when insert lacing wire 4, such as Fig. 5.When static blade be single chip architecture, lacing wire 4 not with lacing wire
Hole top is fitted, and under working speed, due to the effect of centrifugal force, lacing wire 4 will fit with lacing hole top, and produce larger
Normal pressure, under the influence of centrifugal force, on the one hand this structure makes to produce frictional force between lacing wire 4 and lacing hole, adds
The damping of system；On the other hand, lacing wire 4 makes blade in groups, improves the vibration performance of blade；Described blade 1, its leading edge back of the body
Provided with part of hardening at arc, length of hardening L is decided according to the actual requirements, and sees Fig. 1.
Claims (6)
1. a kind of leaving area 3.2m2The low-pressure stage group exhaust stage blade of industrial steam turbine, it is a kind of variable cross-section twisted blade, including
Blade, blade root and the lacing wire boss being arranged on blade；It is characterized in that, blade is variable cross-section twisted blade, by some characteristic cross-sections
Coincide and form by specific rule, the profile molded line of characteristic cross-section is by inner arc curve and carries on the back the closed curve that curved line is surrounded, and is cut
The rule that coincides in face is excessive along the high direction of leaf from each section continuous and derivable in root to top, from the area of section at root to top
It is gradually reduced, has relative torsion between adjacent two sections；Blade Ld high with respect to leaf monotonicallys increase up to 100% by 0%, from blade root section
Pitch to chord length to leaf top section than T/b changing rule is：0.38≤T/b≤0.91；From blade root section to leaf top section
Pitch is than T/B changing rule with blade profile section axial width：0.39≤T/B≤1.26；From blade root section to leaf top section
Pitch is than T/Dmax changing rule with blade profile section maximum gauge：2.44≤T/Dmax≤15.30；From blade root section to leaf top
The pitch in section is than T/A changing rule with blade profile area of section：0.02≤T/A≤0.12；From blade root section to leaf top section
Blade profile leading-edge radius R0 changing rules be：2.03mm≤R0≤4.04mm；From blade root section to the blade profile trailing edge of leaf top section
Radius R1 changing rules are：1.01mm≤R1≤2.03mm.
2. leaving area 3.2m according to claim 12The low-pressure stage group exhaust stage blade of industrial steam turbine, it is characterized in that institute
The blade stated highly is 560mm, and blade root axial width is 149.37mm, and root diameter (RD) is 1120mm, top axial width
For 93.61mm, the leaving area of blade is 3.2m2。
3. leaving area 3.2m according to claim 12The low-pressure stage group exhaust stage blade of industrial steam turbine, it is characterized in that institute
Blade root is stated for fir-tree type, blade root axial width is 160mm.
4. leaving area 3.2m according to claim 12The low-pressure stage group exhaust stage blade of industrial steam turbine, it is characterized in that institute
Lacing wire boss is stated at blade working part from bottom to up high relative to leaf 0.625, and one is partially fabricated with blade working,
And lacing wire boss is provided with lacing hole, circle is in lacing wire boss section, the spirogyrate in blade working part, in convex surface
Into boss structure, the inner arc working face and back of the body arc working face of lacing wire boss are parallel to each other.
5. leaving area 3.2m according to claim 42The low-pressure stage group exhaust stage blade of industrial steam turbine, it is characterized in that institute
State a diameter of 14mm of lacing hole, lacing wire boss centre-to-centre spacing blade bottom 350mm, the inner arc working face of lacing wire boss and back of the body arc work
The distance between face is 26mm, inserts in lacing wire boss lacing wire when leaf joint is assembled, blade is grouped.
6. leaving area 3.2m according to claim 12The low-pressure stage group exhaust stage blade of industrial steam turbine, it is characterized in that institute
Provided with part of hardening at the blade stated, its leading edge back of the body arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619739.XA CN106089314B (en) | 2016-07-29 | 2016-07-29 | Leaving area 3.2m2The low-pressure stage group final stage moving blade of efficient industrial steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619739.XA CN106089314B (en) | 2016-07-29 | 2016-07-29 | Leaving area 3.2m2The low-pressure stage group final stage moving blade of efficient industrial steam turbine |
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| CN106089314B true CN106089314B (en) | 2017-10-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707461B (en) * | 2018-08-22 | 2024-02-23 | 杭州汽轮动力集团股份有限公司 | High-rotation-speed high-load final-stage movable blade for industrial steam turbine |
| CN111120007A (en) * | 2018-10-31 | 2020-05-08 | 杭州汽轮机股份有限公司 | High-speed, high-efficient industrial steam turbine low pressure last stage moving blade |
| CN113221482B (en) * | 2021-05-26 | 2023-12-29 | 杭州汽轮控股有限公司 | Design method for combination of turbine final stage blade and exhaust cylinder |
| CN114164810B (en) * | 2021-12-14 | 2023-01-24 | 长沙理工大学 | Full-automatic garbage cleaning ship |
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| US3953148A (en) * | 1973-04-30 | 1976-04-27 | Bbc Brown Boveri & Company Limited | Configuration of the last moving blade row of a multi-stage turbine |
| CN101117895A (en) * | 2007-09-06 | 2008-02-06 | 东方电气集团东方汽轮机有限公司 | Variable-speed turbine final stage moving vane |
| CN102434223A (en) * | 2011-12-13 | 2012-05-02 | 杭州汽轮机股份有限公司 | Low-pressure stage final blade of large-flow air-cooled steam turbine |
| CN103806946A (en) * | 2013-10-30 | 2014-05-21 | 杭州汽轮机股份有限公司 | Variable speed industrial steam turbine low-pressure stage group last stage blade with steam exhaust area of 2.1 m<2> |
| CN104196573A (en) * | 2014-07-28 | 2014-12-10 | 杭州汽轮机股份有限公司 | Low-pressure last stage blade of rotating speed-variable air cooling industrial steam turbine with steam exhaust area of 3.6 m2 |
| CN205918447U (en) * | 2016-07-29 | 2017-02-01 | 杭州汽轮机股份有限公司 | High -efficient industrial steam turbine's of exhaust area 3. 2m2 moving blade of low -pressure stage group |
-
2016
- 2016-07-29 CN CN201610619739.XA patent/CN106089314B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3953148A (en) * | 1973-04-30 | 1976-04-27 | Bbc Brown Boveri & Company Limited | Configuration of the last moving blade row of a multi-stage turbine |
| CN101117895A (en) * | 2007-09-06 | 2008-02-06 | 东方电气集团东方汽轮机有限公司 | Variable-speed turbine final stage moving vane |
| CN102434223A (en) * | 2011-12-13 | 2012-05-02 | 杭州汽轮机股份有限公司 | Low-pressure stage final blade of large-flow air-cooled steam turbine |
| CN103806946A (en) * | 2013-10-30 | 2014-05-21 | 杭州汽轮机股份有限公司 | Variable speed industrial steam turbine low-pressure stage group last stage blade with steam exhaust area of 2.1 m<2> |
| CN104196573A (en) * | 2014-07-28 | 2014-12-10 | 杭州汽轮机股份有限公司 | Low-pressure last stage blade of rotating speed-variable air cooling industrial steam turbine with steam exhaust area of 3.6 m2 |
| CN205918447U (en) * | 2016-07-29 | 2017-02-01 | 杭州汽轮机股份有限公司 | High -efficient industrial steam turbine's of exhaust area 3. 2m2 moving blade of low -pressure stage group |
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| CN106089314A (en) | 2016-11-09 |
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Address after: 310022 Building 1, No. 608, Kangxin Road, Linping District, Hangzhou, Zhejiang Patentee after: Hangzhou Turbine Power Group Co.,Ltd. Address before: 357 Shiqiao Road, Xiacheng District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU STEAM TURBINE Co.,Ltd. |