CN106194292B - Steam turbine rotary spacing plate - Google Patents
Steam turbine rotary spacing plate Download PDFInfo
- Publication number
- CN106194292B CN106194292B CN201610794901.1A CN201610794901A CN106194292B CN 106194292 B CN106194292 B CN 106194292B CN 201610794901 A CN201610794901 A CN 201610794901A CN 106194292 B CN106194292 B CN 106194292B
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- Prior art keywords
- outer shroud
- magnetic
- field generator
- steam turbine
- present
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- 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
- F01D25/007—Preventing corrosion
-
- 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
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Steam turbine rotary spacing plate, it is related to a kind of dividing plate.The present invention in order to solve the problems, such as existing steam turbine rotary spacing plate using heating means dehumidified when exist it is complicated.The present invention includes inner ring (1), outer shroud (2) and nozzle vane (3), connected between inner ring (1) and outer shroud (2) by nozzle vane (3), it also includes field generator for magnetic (6) and intensity reinforcing ring (7), on outer shroud (2) cavity (4) and multiple pod apertures (5) connected with cavity (4) are offered along its circumferencial direction, field generator for magnetic (6) is arranged on the outside of outer shroud (2), and magnetic field caused by field generator for magnetic (6) is set to penetrate the sides adjacent ring body of outer shroud (2), intensity reinforcing ring (7) is sleeved on the outer circle wall of outer shroud (2).The present invention is used in the steam turbine of heat power generating system.
Description
Technical field
The present invention relates to a kind of dividing plate, and in particular to a kind of steam turbine dividing plate.
Background technology
The dividing plate of steam turbine is fixed in the cylinder, there is many stator blades, a stator blade and a movable vane group in a cylinder
Into one-level, superheated steam enters first stage stator blades piece from porthole, and stator blade water conservancy diversion steam enters movable vane piece, drive rotor, by heat
Mechanical energy can be converted to, the steam by the first order enters back into second level stator blade and movable vane, is exactly mainly to play water conservancy diversion steam
Effect.Overheat or saturated vapor expansion work in steam turbine, through after saturated line, having droplets form and separating out makes vapor wet
Degree increase.If humidity is excessive and take no action in steam turbine, several grade blades in end can corrode, and will be damaged after the several years that works
It is bad, or even fracture；There is acting steam humidity also declined unit efficiency in addition.Solve disappearing for Steam Turbine humidity influence
Pole method is surface technology against corrosion, and positive method is dehumidifying technology, using earliest and widest dehumanization method in steam turbine
Outer rim partition method, it is to open up moisture-removal groove in outer rim, using nozzle blade cascade and work leaf grating to work steam flow torsion and
Centrifugal effect, water droplet is got rid of to outer rim, imported after being introduced into groove in condenser.Simple outer rim partition method dehumidification rate is relatively low.
Different according to dehumidifying position, steam turbine internal moisture removal method can use stator dehumidifying technology, and it is by stator
Cavity is made, by chamber by suction, purging or heating method by be attached to stator surface liquid film or trailing edge gather it is big
Drop removes, to increase steam quality.By introducing heat into stator cavity, heating wall, make outer surface water film evaporation
And prevent trailing edge from forming secondary big water droplet.The former Soviet Union is done experiment to observe with turbine dynamic test platform and found：Heated surface has
The characteristic on non-infiltration surface, water droplet is seted to form secondary big water droplet from resident in surface-stable.The method is in practical application
In to consider introduce heat number, can if not changing the structure beyond hollow stator dividing plate and introducing the vapours of previous stage
Moisture film can be prevented from fully evaporating due to shortage of heat.If being drawn gas at higher temperature can make blade surface obtain foot
Enough heats make moisture film fully evaporate, but to change the structure beyond hollow stator dividing plate, system design is tended to be complicated.It is comprehensive
Upper described, there is the problem of complicated in existing steam turbine rotary spacing plate when being dehumidified using heating means.
The content of the invention
Deposited the invention aims to solve existing steam turbine rotary spacing plate when being dehumidified using heating means
Complicated the problem of.And then provide a kind of steam turbine rotary spacing plate.
The technical scheme is that：Steam turbine rotary spacing plate includes inner ring, outer shroud and nozzle vane, inner ring and outer rings it
Between connected by nozzle vane, it also includes field generator for magnetic and intensity reinforcing ring, is offered on outer shroud along its circumferencial direction
Cavity and multiple pod apertures connected with cavity, field generator for magnetic are arranged on the outside of outer shroud, and produce field generator for magnetic
Raw magnetic field penetrates the sides adjacent ring body of outer shroud, and intensity reinforcing ring is sleeved on the outer circle wall of outer shroud.
The present invention has the following effects that compared with prior art：
1st, the present invention is to be provided with field generator for magnetic, field generator for magnetic on the upper lid of steam-turbine unit bulkhead cover dress
Length is 1200~2000mm；Field generator for magnetic acts on electromagnetic induction body (i.e. outer shroud 2), along the circumference of electromagnetic induction body
Direction is alternately arranged.Vortex is produced between the field generator for magnetic that the outer shroud 2 of rotation and position are fixed, eddy-current heating, is passed through
The heat will be attached in nozzle vane and cavity the water droplet being collected into and be evaporated, and then the purpose to dehumidify.
2nd, the present invention is flowed into cavity to evaporate using caused vortex heat between dividing plate and upper lid via pod apertures
Interior moisture, the moisture of evaporation are discharged by pod apertures and flowed through together in next blade in company with steam, reduce and avoid due to
The problem of several grade blades in end can corrode caused by humidity is excessive in steam turbine, the service life of blade extends 5-7.
3rd, the present invention is simple in construction, effectively make use of when steam enters dividing plate to dividing plate work done, by machinery
Kinetic energy can be converted into, then heat energy is converted into from kinetic energy, it is easy to accomplish.
Brief description of the drawings
Fig. 1 is the front view of the present invention；Fig. 2 is half dividing plate schematic diagram；Fig. 3 is when intensity reinforcing ring is two
When, Fig. 2 is along the sectional view at A-A；Fig. 4 is along the sectional view at A-A when intensity reinforcing ring is one；Fig. 5 be the present invention with
Structural representation when upper lid is used cooperatively.
Embodiment
Embodiment one：Illustrate present embodiment, a kind of steam turbine rotation of present embodiment with reference to Fig. 1 to Fig. 5
Dividing plate includes inner ring 1, outer shroud 2 and nozzle vane 3, is connected between inner ring 1 and outer shroud 2 by nozzle vane 3, it also includes magnetic field
Generating means 6 and intensity reinforcing ring 7, cavity 4 and multiple water conservancy diversion connected with cavity 4 are offered along its circumferencial direction on outer shroud 2
Hole 5, field generator for magnetic 6 are arranged on the outside of outer shroud 2, and magnetic field caused by field generator for magnetic 6 is penetrated the adjacent of outer shroud 2
Side ring body, intensity reinforcing ring 7 are sleeved on the outer circle wall of outer shroud 2.
The field generator for magnetic 6 of present embodiment uses rare-earth permanent magnet or electromagnet.Field generator for magnetic 6 is fixed on
On upper lid.
The inner ring 1 and outer shroud 2 of present embodiment use Foundry Production, inner ring 1 and outer shroud 2 by two half annulus
Fastening what is formed, circumferencial direction of the pod apertures 5 along inner ring 1 equidistantly opens up 4 to 8, and the duct of pod apertures 5 is streamlined,
It is easy to the quick adsorption of water droplet to flow into.
Present embodiment is effectively utilized the electromagnetic induction body cutting magnetic line that outer shroud 2 is formed so that dividing plate outer shroud produces
Raw a large amount of vortex, eddy-current heating can evaporate water droplet.
The cavity 4 of present embodiment is quadrangle cavity.It is arranged such, the collection being easy to as water droplet provides suitable sky
Between.
Embodiment two：Illustrate present embodiment with reference to Fig. 5, field generator for magnetic 6 is multiple, and multiple magnetic fields are sent out
Even circumferential distribution of the generating apparatus 6 along outer shroud 2.It is arranged such, is easy to select suitable quantity according to the actual demand to temperature
Field generator for magnetic, during if desired for improving temperature, then at least one magnetic field hair can be separately installed with upper lid and bottom seat
Generating apparatus, it can also set multiple.Other compositions and annexation are identical with embodiment one.
Embodiment three：Illustrate present embodiment with reference to Fig. 3 and Fig. 4, present embodiment intensity reinforcing ring 7 is non-ferric
Magnetic material is made.It is arranged such, due to using high temperature evaporation moisture, in order to ensure that rotating barrier can also in real work
Ensure the use intensity up to or over original dividing plate, the present invention is set with intensity reinforcing ring on dividing plate outer ring, for protecting
Card dividing plate remains able to possess good intensity after heated.Other compositions and annexation and embodiment one or two-phase
Together.
Embodiment four：Illustrate present embodiment with reference to Fig. 3 and Fig. 4, the intensity reinforcing ring 7 of present embodiment is copper
Ring or stainless steel ring.It is arranged such, intensity reinforcing ring 7 does not produce vortex, while can strengthen the overall work intensity of dividing plate, carries
High service life.Other compositions and annexation are identical with embodiment one, two or three.
Embodiment five：Illustrate present embodiment with reference to Fig. 3 and Fig. 4, the intensity reinforcing ring 7 of present embodiment is more
It is individual.When intensity reinforcing ring 7 is one, intensity reinforcing ring 7 is directly to be sleeved on the lateral wall of outer shroud 2；When intensity reinforcing ring 7
For it is two or more when, open up groove on the periphery wall of outer shroud 2, an intensity reinforcing ring 7 be installed in each groove.So set
Put, save space, be easy to improve the intensity of outer shroud 2, and under the high temperature conditions by being examined to the performance parameter of outer shroud 2
Survey, additionally it is possible to intensity reinforcement more targetedly is carried out to the place of performance parameters difference on outer shroud 2, intensity is strengthened being balanced to tool
The point of body.Other compositions and annexation are identical with embodiment one, two, three or four.
Embodiment six：Illustrate present embodiment with reference to Fig. 3 and Fig. 4, the pod apertures 5 of present embodiment, which are opened in, to be leaned on
The nearly side of nozzle vane 3.It is arranged such, is easy to the local water droplet progress that moisture film is formed on nozzle vane is quickly and comprehensive
Absorptive collection.Other compositions and annexation are identical with embodiment one, two, three, four or five.
Embodiment seven：Illustrate present embodiment with reference to Fig. 3 and Fig. 4, the pod apertures 5 of present embodiment are led for taper
Discharge orifice.It is arranged such, is easy to collect and deposit water droplet.Other compositions and annexation and embodiment one, two, three, four,
Five or six is identical.
Opening in the pod apertures 5 of present embodiment close to nozzle vane side is big, the side opening connected with inner chamber 4
It is small, for the ease of in the memory storage water droplet of pod apertures 5, being collected at any time to water droplet in heat generating member reciprocatory movement.
Embodiment eight：Illustrate present embodiment with reference to Fig. 4, the inner chamber in the inner ring 1 and outer shroud 2 of present embodiment
Open cross-sectional area is a quarter that inner ring 1 and the body cross-section of outer shroud 2 are accumulated to 1/3rd.It is arranged such, is easy to mitigate
The weight of dividing plate, so as to reduce energy loss.Other compositions and annexation and embodiment one, two, three, four, five, six
Or seven is identical.
The NM content of the present invention and principle are prior art.
The dehumidification principle of the present invention：The vortex of the present invention is when field generator for magnetic is placed in time-varying magnetic field, in conductor
Induced electric field can be evoked, electronics will form electric current under the driving of induced electric field in conductor, because this electric current is closure electricity
Stream, therefore it is vortex.The present invention is exactly to utilize eddy heating for heating metallic conductor using sensing heating, is allowed to contactless heating.This
Heated metal is placed in the electromagnetic field of high frequency change by invention, and powerful electromagnetic field forms inductive loop on its surface, is relied on
The internal resistance of material in itself, it is allowed to generate heat rapidly, to evaporate the water droplet or moisture film on dividing plate.
The present invention in actual use, in order to ensure steam turbine it is normal effectively operation, prevent steam turbine rotation every
Plate causes the shadow caused by the performance of other components of Steam Turbine in using eddy-current heating dehumidification process because temperature is too high
Ring, the intensity reinforcing ring for increasing varying number on outer shroud has been respectively adopted, size and size to intensity reinforcing ring are also carried out
Adjustment, above-mentioned parameter have an impact for heat caused by vortex, and temperature caused by the vortex after adjustment answers 200 DEG C -250
℃。
Such as：The small steam turbine that one rated power is 850kW, relatively wide is required to steam quality, typically may be used
With drawing gas with steam turbine：Rated steam inlet pressure is 0.8MPa -0.13MPa；Rated steam inlet temperature is 245 DEG C -325 DEG C；Adopt
Be arranged on a reinforcing ring in the annular groove of outer shroud, using field generator for magnetic, using this caused electromagnetic eddy temperature as
220-230 DEG C, water droplet can be evaporated.
Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, art technology
Personnel can also do other changes in spirit of the invention, and be applied in the NM field of the present invention, certainly, these according to
The change done according to spirit of the invention should be all included in scope of the present invention.
Claims (1)
1. a kind of steam turbine rotary spacing plate, it includes inner ring (1), outer shroud (2) and nozzle vane (3), inner ring (1) and outer shroud (2)
Between pass through nozzle vane (3) connect, it is characterised in that：It also includes field generator for magnetic (6) and intensity reinforcing ring (7), outside
On ring (2) cavity (4) and multiple pod apertures (5) connected with cavity (4), field generator for magnetic are offered along its circumferencial direction
(6) outside of outer shroud (2) is arranged on, and magnetic field caused by field generator for magnetic (6) is penetrated the sides adjacent ring body of outer shroud (2),
Intensity reinforcing ring (7) is sleeved on the outer circle wall of outer shroud (2)；
Field generator for magnetic (6) is multiple, and even circumferential of the multiple field generator for magnetic (6) along outer shroud (2) is distributed；
Intensity reinforcing ring (7) is made up of nonferromugnetic material；
Pod apertures (5) are opened in close to nozzle vane (3) side；
Field generator for magnetic (6) uses rare-earth permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794901.1A CN106194292B (en) | 2016-08-31 | 2016-08-31 | Steam turbine rotary spacing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794901.1A CN106194292B (en) | 2016-08-31 | 2016-08-31 | Steam turbine rotary spacing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106194292A CN106194292A (en) | 2016-12-07 |
| CN106194292B true CN106194292B (en) | 2018-03-20 |
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ID=58085747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610794901.1A Active CN106194292B (en) | 2016-08-31 | 2016-08-31 | Steam turbine rotary spacing plate |
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| Country | Link |
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| CN (1) | CN106194292B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542210B (en) * | 2022-03-09 | 2023-12-05 | 中国船舶重工集团公司第七0三研究所 | Positioning structure of steam turbine partition plate retaining ring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008328A (en) * | 2006-01-27 | 2007-08-01 | 三菱重工业株式会社 | Stationary blade ring of axial compressor |
| CN101196323A (en) * | 2008-01-10 | 2008-06-11 | 北京亚都空气污染治理技术有限公司 | Method for removing water in the air and thermal regeneration mechanism of dehumidification runner |
| CN103726891A (en) * | 2014-01-24 | 2014-04-16 | 中国船舶重工集团公司第七�三研究所 | Hollow separation board for turbine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08200007A (en) * | 1995-01-30 | 1996-08-06 | Mitsubishi Heavy Ind Ltd | Moisture removing device of steam turbine |
| CN103383047B (en) * | 2013-07-29 | 2016-08-10 | 杭州信多达电器有限公司 | Electromagnetic heating device for spiral pipeline |
| CN103437831B (en) * | 2013-08-28 | 2015-06-17 | 国家电网公司 | Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device |
| CN103953397B (en) * | 2014-04-21 | 2015-11-18 | 哈尔滨汽轮机厂有限责任公司 | A kind of large steam turbine final stage dehumidifying stationary blade sheet |
-
2016
- 2016-08-31 CN CN201610794901.1A patent/CN106194292B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008328A (en) * | 2006-01-27 | 2007-08-01 | 三菱重工业株式会社 | Stationary blade ring of axial compressor |
| CN101196323A (en) * | 2008-01-10 | 2008-06-11 | 北京亚都空气污染治理技术有限公司 | Method for removing water in the air and thermal regeneration mechanism of dehumidification runner |
| CN103726891A (en) * | 2014-01-24 | 2014-04-16 | 中国船舶重工集团公司第七�三研究所 | Hollow separation board for turbine |
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| Publication number | Publication date |
|---|---|
| CN106194292A (en) | 2016-12-07 |
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