CN110318820A - A kind of stator blade compound-dehumidifying structure of steam turbine - Google Patents
A kind of stator blade compound-dehumidifying structure of steam turbine Download PDFInfo
- Publication number
- CN110318820A CN110318820A CN201910562380.0A CN201910562380A CN110318820A CN 110318820 A CN110318820 A CN 110318820A CN 201910562380 A CN201910562380 A CN 201910562380A CN 110318820 A CN110318820 A CN 110318820A
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- Prior art keywords
- stator blade
- steam turbine
- suction
- purging
- chamber
- 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.)
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- 238000010926 purge Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 150000002739 metals Chemical class 0.000 claims abstract description 14
- 238000007791 dehumidification Methods 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 230000008020 evaporation Effects 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 230000009102 absorption Effects 0.000 description 18
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a kind of stator blade compound-dehumidifying structures of steam turbine, including fixed blade for steam turbine suction dehumidifying, the heating of stator blade cavity and purging dehumidification structure, and are provided with the suction seam and purging seam on stator blade surface；Wherein, there are two independent chambers for tool in the stator blade of steam turbine, respectively it is located at the up-front suction chamber of stator blade, inside is filled with porous metals, heating and purging chamber for realizing the suction dehumidifying of the stator blade surface moisture film of steam turbine, and positioned at stator blade rear, for hollow cavity, for realizing the purging tearing of the heating evaporation and trailing edge surface moisture film of the stator blade surface moisture film of steam turbine simultaneously, suction seam is provided on the up-front suction surface of stator blade and pressure face, and purging seam is provided with stator blade trailing edge.Whole design advantages of simple of the present invention adapts to the requirement of Variable Conditions of Steam Turbine operation, can greatly improve the dehumidification efficiency of steam turbine, guarantee the safety and economy of steam turbine operation.
Description
Technical field
The invention belongs to steam turbine technology field, in particular to the stator blade compound-dehumidifying structure of a kind of steam turbine.
Background technique
Steam turbine is the main dynamics equipment for converting steam thermal energy to mechanical energy, is widely used in electric power, chemical industry, nuclear power
Equal industrial circles.The problem of being widely present be, steam expanded in steam turbine to a certain extent will Spontaneous Condensation nucleation, formed
Small water droplet, so the end of large steam turbine what and most nuclear steam turbines are run under wet-steam phase.
And the blade of steam turbine is under long-term water droplet high speed impact, it may occur that serious erosion is even broken, and causes the broken of steam turbine
It is bad.Meanwhile the humidity increase of steam can be such that the efficiency of stage reduces, and cause huge economic loss.
In order to reduce the steam moisture in steam turbine, generally in stage using stator blade dehumidifying, movable vane dehumidifying and
The methods of separator is arranged in partition.Dehumanization method can be divided by the difference of working method in the stator blade of steam turbine: stator blade suction
Dehumidifying, the heating of stator blade cavity and purging dehumidifying.Suction dehumidifying opens up 1 on the pressure face or suction surface usually near stator blade leading edge
It being stitched to 2 moisture absorptions, optimal design scheme will guarantee that pressure is equal at the dehumidifying seam of pressure face and suction surface, but by blade type
It is constantly present certain pressure difference at the dehumidifying seam of the limitation of cable architecture and the influence of variable parameter operation, pressure face and suction surface,
Moisture is caused directly to spray from another gap after sucking in a gap, i.e. moisture film crossfire, to greatly reduce
Dehumidification efficiency.The heating of stator blade cavity is made outside stator blade by introducing high temperature and high pressure steam into stator blade cavity come heated internal wall face
The water film evaporation on surface reduces the formation of coarse water；It can be opened simultaneously in the positions such as the inner arc of stator blade or back arc even trailing edge
If purging gap, the moisture film of stator blade surface flow is blown off tearing through gap, reasonable purging gap structure and barometric gradient
The flowing moisture film on stator blade surface can effectively be removed.
In the prior art, different dehumanization methods respectively has superiority and inferiority, but due to the design comparison of dehumidification structure complexity, in spy
Under fixed design condition, usually only with single dehumanization method, this results in the dehumidification efficiency of steam turbine relatively low, especially
Under conditions of variable parameter operation, the operation of actual steam turbine dehumidification structure deviates design conditions, is more difficult to be optimal
Effect on moisture extraction.
Summary of the invention
The object of the present invention is to provide a kind of stator blade compound-dehumidifying structures of steam turbine, and stator blade suction dehumidifying, stator blade is empty
Three kinds of methods of chamber heating and purging dehumidifying combine, and overall construction design advantages of simple adapts to Variable Conditions of Steam Turbine operation
It is required that the dehumidification efficiency of steam turbine can greatly be improved, guarantee the safety and economy of steam turbine operation.
The present invention adopts the following technical scheme that realize:
A kind of stator blade compound-dehumidifying structure of steam turbine, including fixed blade for steam turbine suction dehumidifying, stator blade cavity are heated and are blown
Dehumidification structure, stator blade design are swept, and the suction seam and purging seam on stator blade surface are set.It is characterized in that, the steam turbine
There are two independent chamber in stator blade, suction chamber is located at stator blade leading edge, and inside is filled with porous metals, for realizing steam turbine
Stator blade surface moisture film suction dehumidifying, it is hollow cavity that heating and purging chamber, which are located at stator blade rear, for and meanwhile realize vapour
The purging tearing of the heating evaporation and trailing edge surface moisture film of the stator blade surface moisture film of turbine, the suction seam are provided with stator blade leading edge
Suction surface and pressure face on, purging seam is provided with stator blade trailing edge.
A further improvement of the present invention lies in that stator blade suction chamber is located at stator blade leading edge, inside is filled with porous metals, steams
Vapour or water can flow freely in the hole of porous metals.Passed sequentially through at the top of suction chamber suction chamber admission opening, every
Plate inner cavity, pressure valve are connected with the final stage exhaust chamber of steam turbine, the bottom of suction chamber pass sequentially through suction chamber discharge outlet,
The inner flow passage of blade root, pressure valve are connected with the internal drainage chamber of steam turbine.The blade root of fixed blade for steam turbine passes through packing and steamer
Machine rotor is connected.
A further improvement of the present invention lies in that stator blade suction seam is provided on the up-front suction surface of stator blade and pressure face, position
Top is extended in 2/3 leaf eminence of stator blade, suction seam is by the first moisture absorption groove, the second moisture absorption groove and third moisture absorption groove and is evenly distributed with and matches
The the first moisture absorption hole, the second moisture absorption hole and third moisture absorption hole used is closed to constitute.
A further improvement of the present invention lies in that stator blade heating and purging chamber are located at stator blade rear, it is hollow cavity, top
It is connected with steam turbine initial steam pipeline, the initial steam of high temperature and pressure flows into cavity through pressure regulator valve, heats stator blade inner wall, makes outer
Surface water film evaporation reduces the formation of stator blade surface second water droplet.Stator blade purging, which seams, to be set in stator blade trailing edge, exit angle with it is quiet
The trailing edge molded line of leaf blade matches, since the steam pressure introduced in hollow cavity is greater than the external pressure of stator blade trailing edge, so
The dry saturated steam of introducing can be stitched from the purging of stator blade trailing edge and be blown out, and directly the moisture film of stator blade surface flow blows off tearing.
A further improvement of the present invention lies in that being evenly arranged in the heating of stator blade and purging chamber along the high direction of leaf
Reinforce fin, on the one hand the setting of fin maintains the exit angle of trailing edge, increases the rigidity and stability of stator blade, on the other hand
The steam stream also enhanced in cavity moves calorific intensity, improves the effect of heating and dehumidification.
The present invention has following beneficial technical effect:
1, stator blade is stitched suction dehumidifying by fixed blade for steam turbine compound-dehumidifying structure of the invention, stator blade cavity heats and purging
The three kinds of methods that dehumidify combine, and overall construction design advantages of simple ensure that high steam turbine dehumidification efficiency.
2, the phenomenon that stator blade of the invention suction dehumidifying chamber is filled with porous metals, is not in moisture film crossfire, this pole
The big efficiency for improving stator blade dehumidifying, is adapted to the service requirement of variable working condition, while aspirating seam and opening up position and quantity
Selection it is also more flexible, this greatly reduces the difficulty designed and manufactured.
3, stator blade heating and blowing chamber of the invention is being evenly arranged reinforcement fin along the high direction of leaf, on the one hand maintains
The exit angle of trailing edge, increases the rigidity and stability of stator blade, on the other hand also enhances the steam fluid interchange in cavity
Intensity improves the effect of stator blade dehumidifying.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the stator blade compound-dehumidifying of steam turbine of the present invention.
Fig. 2 is stator blade structural profile illustration.
Description of symbols:
1- steam turbine admission passage, 2- final stage exhaust chamber, 3- internal drainage chamber, 4- partition, 5- suction chamber admission opening,
6- heating chamber admission opening, 7- stator blade, 8- suction chamber discharge outlet, 9- blade root, 10- packing, 11- rotor, the first moisture absorption of 12-
Slot, 13- suction hole, 14- moisture absorption groove, 15- suction hole, 16- suction chamber, 17- moisture absorption groove, 18- suction hole, 19- stator blade blade,
20- fin, 21- heating and purging chamber.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be further described:
It is quiet to please refer to Fig. 1 to Fig. 2, a kind of stator blade compound-dehumidifying structure of steam turbine provided by the invention, including steam turbine
Leaf suction dehumidifying, the heating of stator blade cavity and purging dehumidification structure, stator blade design, and the suction seam on stator blade surface is set and is blown
Sweep seam.
Referring to Fig. 1, the suction chamber 16 of stator blade 7 is located at stator blade leading edge, inside is filled with porous metals, and steam or water can
To be flowed freely in the hole of porous metals.The top of suction chamber 16 passes sequentially through suction chamber admission opening 5, partition inner cavity
4, pressure valve is connected with the final stage exhaust chamber 2 of steam turbine, the bottom of suction chamber 16 pass sequentially through suction chamber discharge outlet 8,
The inner flow passage of blade root 9, pressure valve are connected with the internal drainage chamber 3 of steam turbine.The blade root 9 of fixed blade for steam turbine by packing 10 with
Turbine rotor 11 is connected.
Referring to Fig. 2, the suction seam of stator blade 7 is provided on the up-front suction surface of stator blade and pressure face, it is located at 2/3 leaf of stator blade
Eminence extends to top, suction seam from the first moisture absorption groove 12, the second moisture absorption groove 14 and third moisture absorption groove 17 and it is uniformly distributed and with make
First moisture absorption hole 13, the second moisture absorption hole 15 and third moisture absorption hole 18 are constituted.When moist steam and moisture film flow through 7 surface of stator blade
When, moisture is collected by moisture absorption groove, these moisture are flowed by moisture absorption hole in suction chamber in 16 more empty metals, along more empty metals
Internal void flows up and down.Because the pressure of final stage exhaust chamber 2 is lower, end is directed toward by the suction chamber 16 of stator blade to be formed
The positive pressure difference of grade discharge chamber 2, most of moisture can be flowed into from the top of suction chamber 16 upwards under the action of barometric gradient
Steam turbine last stage exhaust chamber 2, extra moisture are collected the internal drainage for flowing into steam turbine through suction chamber discharge outlet 8 by blade root 9
Chamber 3.
In previous design, stator blade suction chamber 16 is hollow cavity, and the steaming of stator blade surface should be all arranged in by having the gap
The equal place of steam pressure, can just avoid moisture film crossfire, this is different under conditions of there are design error and variable parameter operation
The equal condition of pressure can be broken at suction seam, moisture film crossfire phenomenon easily occur, so that the dehumidifying of stator blade can be greatly reduced
Efficiency.In the present invention, stator blade suction chamber 16 is filled with porous metals, and moisture film is passed through except wet hole imports in porous metals, even if
Be different suction seam at pressure differ, moisture film also can under biggish barometric gradient in porous metals gap directly along leaf height
Direction flow to top or bottom, and the phenomenon that without moisture film crossfire, this greatly improves the efficiency of stator blade dehumidifying, can be with
The service requirement of variable working condition is adapted to, while the selection for aspirating position and quantity that seam opens up is also more flexible.
Please refer to Fig. 1 to Fig. 2, the heating of stator blade 7 and purging chamber 21 are located at stator blade rear, for hollow cavity, top according to
It is secondary to be connected by heating chamber admission opening 6, partition inner cavity 4, pressure valve with steam turbine admission passage 1, the steam warp of high temperature and pressure
Pressure valve flows into heating and purging chamber 21, heats stator blade inner wall, makes outer surface water film evaporation, reduces stator blade surface second
The formation of water droplet.Stator blade purging, which seams, to be set in stator blade trailing edge, and the trailing edge molded line of exit angle and stator blade blade 19 matches, due to
The steam pressure introduced in hollow cavity is greater than the external pressure of stator blade trailing edge, so the dry saturated steam introduced can blowing from stator blade trailing edge
Seam blowout is swept, directly the moisture film of stator blade surface flow blows off tearing.
Fin 20, the setting of fin 21 have been evenly arranged along the high direction of leaf in the heating of stator blade 7 and purging chamber 21
On the one hand the exit angle of trailing edge is maintained, increases the rigidity and stability of stator blade, on the other hand also enhances heating and purging
Steam stream in chamber 21 moves calorific intensity, improves the effect of heating and dehumidification.
The above is only a preferred embodiment of the present invention, wound is not being made for those of ordinary skill in the art
It is obtained under the premise of the property made labour improve, modification or other embodiments etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of stator blade compound-dehumidifying structure of steam turbine, which is characterized in that including fixed blade for steam turbine suction dehumidifying, stator blade cavity
Heating and purging dehumidification structure, and it is provided with the suction seam and purging seam on stator blade surface；Wherein,
There are two independent chambers for tool in the stator blade (7) of steam turbine, are respectively located at the up-front suction chamber of stator blade (16), internal
Filled with porous metals, for realizing the suction dehumidifying of the stator blade surface moisture film of steam turbine, and positioned at the heating of stator blade rear
It is hollow cavity with purging chamber (21), the heating evaporation and trailing edge table of the stator blade surface moisture film for realizing steam turbine simultaneously
The purging of face moisture film is torn, and suction seam is provided on the up-front suction surface of stator blade and pressure face, and purging seam is provided with stator blade trailing edge.
2. a kind of stator blade compound-dehumidifying structure of steam turbine according to claim 1, which is characterized in that suction chamber (16)
Top pass sequentially through suction chamber admission opening (5), partition inner cavity (4), pressure valve and steam turbine final stage exhaust chamber (2) phase
Even, the bottom of suction chamber (16) passes sequentially through internal flow, pressure valve and the steamer of suction chamber discharge outlet (8), blade root (9)
The internal drainage chamber (3) of machine is connected.
3. a kind of stator blade compound-dehumidifying structure of steam turbine according to claim 1, which is characterized in that the pumping of stator blade (7)
It inhales seam to be provided on the up-front suction surface of stator blade and pressure face, extends to top positioned at 2/3 leaf eminence of stator blade, including be evenly distributed with and match
Close the first moisture absorption groove (12) used and the first moisture absorption hole (13), the second moisture absorption groove (14) and the second moisture absorption hole (15) and third
Moisture absorption groove (17) and third moisture absorption hole (18)；When moist steam and moisture film flow through stator blade (7) surface, water is collected by moisture absorption groove
Point, it is flowed into suction chamber in more empty metals of (16) by moisture absorption hole, most of moisture can be under the action of barometric gradient upwards
From the top of suction chamber (16) flow into steam turbine last stage exhaust chamber (2), extra moisture through suction chamber discharge outlet (8) by
Blade root (9) collects the internal drainage chamber (3) for flowing into steam turbine.
4. a kind of stator blade compound-dehumidifying structure of steam turbine according to claim 1, which is characterized in that heating and purging chamber
Heating chamber admission opening (6), partition inner cavity (4), pressure valve and steam turbine admission passage (1) phase are passed sequentially through at the top of room (21)
Even, the steam of high temperature and pressure flows into heating and purging chamber (21) through pressure valve, stator blade inner wall is heated, from stator blade trailing edge
Purging seam blowout.
5. a kind of stator blade compound-dehumidifying structure of steam turbine according to claim 1, which is characterized in that stator blade purging seams
It sets in stator blade trailing edge, the trailing edge molded line of exit angle and stator blade blade (19) matches.
6. a kind of stator blade compound-dehumidifying structure of steam turbine according to claim 1, which is characterized in that in stator blade (7)
Fin (20) have been evenly arranged along the high direction of leaf in heating and purging chamber (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910562380.0A CN110318820B (en) | 2019-06-26 | 2019-06-26 | Stationary blade composite dehumidifying structure of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910562380.0A CN110318820B (en) | 2019-06-26 | 2019-06-26 | Stationary blade composite dehumidifying structure of steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110318820A true CN110318820A (en) | 2019-10-11 |
| CN110318820B CN110318820B (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910562380.0A Active CN110318820B (en) | 2019-06-26 | 2019-06-26 | Stationary blade composite dehumidifying structure of steam turbine |
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| Country | Link |
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| CN (1) | CN110318820B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610285A (en) * | 2020-12-18 | 2021-04-06 | 武汉大学 | Hollow quiet leaf of imitative diamond cell topology's steam turbine strengthens dehumidification structure and steam turbine dehydrating unit |
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| CN101255805A (en) * | 2008-03-11 | 2008-09-03 | 西安交通大学 | Wet vapor level suction dehumidifier for steam turbine |
| EP2282013A2 (en) * | 2009-06-30 | 2011-02-09 | General Electric Company | Moisture removal provisions for steam turbine |
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| CN103437831A (en) * | 2013-08-28 | 2013-12-11 | 国家电网公司 | Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device |
| WO2019117752A1 (en) * | 2017-12-12 | 2019-06-20 | Публичное Акционерное Общество "Силовые Машины-Зтл, Лмз, Электросила, Энергомашэкспорт" (Пао "Силовые Машины") | Guide vane for a wet steam turbine |
-
2019
- 2019-06-26 CN CN201910562380.0A patent/CN110318820B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004124751A (en) * | 2002-09-30 | 2004-04-22 | Toshiba Corp | Moisture separation device for steam turbine |
| JP2007170211A (en) * | 2005-12-20 | 2007-07-05 | Toshiba Corp | Moisture separator of steam turbine and steam turbine having it |
| CN101255805A (en) * | 2008-03-11 | 2008-09-03 | 西安交通大学 | Wet vapor level suction dehumidifier for steam turbine |
| EP2282013A2 (en) * | 2009-06-30 | 2011-02-09 | General Electric Company | Moisture removal provisions for steam turbine |
| JP2012202314A (en) * | 2011-03-25 | 2012-10-22 | Toshiba Corp | Moisture removing apparatus of steam turbine |
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| CN103437831A (en) * | 2013-08-28 | 2013-12-11 | 国家电网公司 | Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device |
| WO2019117752A1 (en) * | 2017-12-12 | 2019-06-20 | Публичное Акционерное Общество "Силовые Машины-Зтл, Лмз, Электросила, Энергомашэкспорт" (Пао "Силовые Машины") | Guide vane for a wet steam turbine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610285A (en) * | 2020-12-18 | 2021-04-06 | 武汉大学 | Hollow quiet leaf of imitative diamond cell topology's steam turbine strengthens dehumidification structure and steam turbine dehydrating unit |
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| Publication number | Publication date |
|---|---|
| CN110318820B (en) | 2021-02-09 |
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