CN106194292A - Steam turbine rotary spacing plate - Google Patents
Steam turbine rotary spacing plate Download PDFInfo
- Publication number
- CN106194292A CN106194292A CN201610794901.1A CN201610794901A CN106194292A CN 106194292 A CN106194292 A CN 106194292A CN 201610794901 A CN201610794901 A CN 201610794901A CN 106194292 A CN106194292 A CN 106194292A
- Authority
- CN
- China
- Prior art keywords
- outer shroud
- magnetic
- steam turbine
- field generator
- present
- 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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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 relates to a kind of dividing plate.The present invention is to solve that existing steam turbine rotary spacing plate exists baroque problem when using heating means to dehumidify.The present invention includes internal ring (1), outer shroud (2) and nozzle vane (3), connected by nozzle vane (3) between internal ring (1) and outer shroud (2), it also includes field generator for magnetic (6) and intensity reinforcing ring (7), cavity (4) and multiple pod apertures (5) connected with cavity (4) are offered along its circumferencial direction on outer shroud (2), field generator for magnetic (6) is arranged on the outside of outer shroud (2), and the magnetic field making field generator for magnetic (6) produce penetrates 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 in the steam turbine of heat power generating system.
Description
Technical field
The present invention relates to a kind of dividing plate, be specifically related to a kind of steam turbine dividing plate.
Background technology
The dividing plate of steam turbine is fixing in the cylinder, has a lot of stator blade, a stator blade and a movable vane group in a cylinder
Becoming one-level, superheated steam enters first stage stator blades sheet from porthole, and stator blade water conservancy diversion steam enters moving vane, and drive rotor, by warm
Can be converted to mechanical energy, the steam through the first order enters back into second level stator blade and movable vane, mainly plays water conservancy diversion steam
Effect.Overheated or saturated vapor expansion work in steam turbine, after saturated line, has droplets form precipitation and makes steam wet
Degree increases.If steam turbine humidity is excessive and takes no action to, last several grade blades can corrode, and will damage after the work several years
Bad, even rupture；The steam that additionally does work has humidity also makes unit efficiency decline.Solve disappearing of Steam Turbine humidity impact
Pole method is surface technology against corrosion, and positive method is dehumidifying technology, in steam turbine application the earliest with widest dehumanization method
Being outer rim partition method, it is to offer moisture-removal groove in outer rim, utilize nozzle blade cascade and work leaf grating to work steam flow torsion and
Centrifugal effect, gets rid of to outer rim by water droplet, imports in condenser after introducing groove.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
Make cavity, the liquid film on stator surface or the big of trailing edge accumulation will be attached to by chamber by the method aspirated, purge or heat
Drop removes, to increase steam quality.By introducing heat, heating wall in stator cavity, outer surface water film is made to evaporate
And make trailing edge can not form the big water droplet of secondary.The former Soviet Union does experiment to observe with turbine dynamic test platform and finds: heated surface has
The characteristic on non-infiltration surface, makes the water droplet can not be resident and form the big water droplet of secondary at surface-stable.The method is applied in reality
In to consider introduce heat number, if not changing the structure beyond hollow stator dividing plate and introducing the vapours of previous stage, can
Moisture film can be made not evaporate fully due to shortage of heat.Blade surface can be made to obtain foot if drawing gas at higher temperature
Enough heats make moisture film fully evaporate, but to change the structure beyond hollow stator dividing plate, make system design tend to complicated.Combine
Upper described, there is baroque problem when using heating means to dehumidify in existing steam turbine rotary spacing plate.
Summary of the invention
The invention aims to solve existing steam turbine rotary spacing plate deposit when using heating means to dehumidify
In baroque problem.And then a kind of steam turbine rotary spacing plate is provided.
The technical scheme is that steam turbine rotary spacing plate include internal ring, outer shroud and nozzle vane, internal ring and outer shroud it
Between connected by nozzle vane, it also includes field generator for magnetic and intensity reinforcing ring, and outer shroud offers along its circumferencial direction
Cavity and multiple pod apertures connected with cavity, field generator for magnetic is arranged on the outside of outer shroud, and makes field generator for magnetic produce
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 compared with prior art has the effect that
1, the present invention is to cover to be provided with field generator for magnetic on steam-turbine unit bulkhead cover dress, field generator for magnetic
A length of 1200～2000mm；Field generator for magnetic acts on (i.e. outer shroud 2) on electromagnetic induction body, along the circumference of electromagnetic induction body
Direction is alternately arranged.Produce eddy current, eddy-current heating between the field generator for magnetic that the outer shroud 2 rotated and position are fixed, pass through
The water droplet that this heat is collected in will be attached to nozzle vane and cavity is evaporated, and then reaches the purpose of dehumidifying.
2, the present invention utilizes the eddy current heat produced between dividing plate and upper cover to evaporate and is flowed into cavity via pod apertures
In moisture, the moisture of evaporation discharged by pod apertures and flows through together in next blade in company with steam, reduce and avoid due to
A few grade blade in the excessive end caused of steam turbine humidity can occur the problem corroded, and extends 5-7 the service life of blade.
3, present configuration is simple, effectively make use of when steam enters into dividing plate to dividing plate work done, by machinery
Kinetic energy can be converted into, then be converted into heat energy from kinetic energy, it is easy to accomplish.
Accompanying drawing explanation
Fig. 1 is the front view of the present invention；Fig. 2 is 1/2nd dividing plate schematic diagrams；Fig. 3 is when intensity reinforcing ring is two
Time, 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
Upper cover with the use of time structural representation.
Detailed description of the invention
Detailed description of the invention one: combine Fig. 1 to Fig. 5 and present embodiment is described, a kind of steam turbine of present embodiment rotates
Dividing plate includes internal ring 1, outer shroud 2 and nozzle vane 3, is connected by nozzle vane 3 between internal ring 1 and outer shroud 2, and it also includes magnetic field
Generating means 6 and intensity reinforcing ring 7, outer shroud 2 offers cavity 4 and multiple water conservancy diversion connected with cavity 4 along its circumferencial direction
Hole 5, field generator for magnetic 6 is arranged on the outside of outer shroud 2, and the magnetic field making field generator for magnetic 6 produce penetrates the adjacent of outer shroud 2
Side ring body, intensity reinforcing ring 7 is 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 electric magnet.Field generator for magnetic 6 is fixed on
On cover.
The internal ring 1 of present embodiment and outer shroud 2 use Foundry Production, internal ring 1 and outer shroud 2 by two 1/2nd annulus
Fastening, pod apertures 5 equidistantly offers 4 to 8 along the circumferencial direction of internal ring 1, and the duct of pod apertures 5 is streamlined,
The quick adsorption being easy to water droplet flows into.
Present embodiment is effectively utilized the electromagnetic induction body cutting magnetic line that outer shroud 2 is constituted so that dividing plate outer shroud produces
Raw a large amount of eddy current, water droplet can be evaporated by eddy-current heating.
The cavity 4 of present embodiment is tetragon cavity.It is arranged such, it is simple to the collection for water droplet provides the most empty
Between.
Detailed description of the invention two: combine Fig. 5 and illustrate that present embodiment, field generator for magnetic 6 are multiple, and multiple magnetic field is sent out
Generating apparatus 6 is distributed along the even circumferential of outer shroud 2.It is arranged such, it is simple to select suitable quantity according to the actual demand of temperature
Field generator for magnetic, if desired for improve temperature time, then can be separately installed with at least one magnetic field on upper cover and base and send out
Generating apparatus, it is also possible to arrange multiple.Other composition is identical with detailed description of the invention one with annexation.
Detailed description of the invention three: combine Fig. 3 and Fig. 4 and illustrate that present embodiment, present embodiment intensity reinforcing ring 7 are non-ferric
Magnetic material is made.It is arranged such, owing to using high temperature evaporation moisture, in order to ensure that rotating barrier can also in real work
Ensureing the use intensity up to or over original dividing plate, the present invention is set with intensity reinforcing ring on dividing plate outer ring, is used for protecting
Card dividing plate remains able to have good intensity after being heated.Other composition and annexation and detailed description of the invention one or two-phase
With.
Detailed description of the invention four: combine Fig. 3 and Fig. 4 and present embodiment is described, the intensity reinforcing ring 7 of present embodiment is copper
Ring or stainless steel ring.Being arranged such, intensity reinforcing ring 7 does not produce eddy current, can strengthen the overall work intensity of dividing plate simultaneously, carry
High service life.Other composition and annexation and detailed description of the invention one, two or three are identical.
Detailed description of the invention five: combine Fig. 3 and Fig. 4 and present embodiment is described, the intensity reinforcing ring 7 of present embodiment is many
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 time two or more, the periphery wall of outer shroud 2 is offered groove, an intensity reinforcing ring 7 is installed in each groove.So set
Put, save space, it is simple to improve the intensity of outer shroud 2, and under the high temperature conditions by the performance parameter of outer shroud 2 is examined
Survey, additionally it is possible to more targetedly the place of performance parameters difference on outer shroud 2 being carried out intensity reinforcement, intensity is strengthened being balanced to tool
The point of body.Other composition and annexation and detailed description of the invention one, two, three or four are identical.
Detailed description of the invention six: combine Fig. 3 and Fig. 4 and present embodiment is described, the pod apertures 5 of present embodiment is opened in be leaned on
Nearly nozzle vane 3 side.It is arranged such, it is simple to the local water droplet forming moisture film on nozzle vane is carried out quick and comprehensive
Absorptive collection.Other composition and annexation and detailed description of the invention one, two, three, four or five are identical.
Detailed description of the invention seven: combine Fig. 3 and Fig. 4 and present embodiment is described, the pod apertures 5 of present embodiment is led for taper
Discharge orifice.It is arranged such, it is simple to collect and deposit water droplet.Other composition and annexation and detailed description of the invention one, two, three, four,
Five or six is identical.
In the pod apertures 5 of present embodiment, the opening near nozzle vane side is big, the side opening connected with inner chamber 4
Little, for the ease of dripping at pod apertures 5 internal memory water storage, at any time water droplet is collected in heat generating member reciprocatory movement.
Detailed description of the invention eight: combine Fig. 4 and present embodiment is described, the inner chamber on the internal ring 1 of present embodiment and outer shroud 2
Open cross-sectional area is 1/to three/4th that internal ring 1 and outer shroud 2 body cross-section are long-pending.It is arranged such, it is simple to alleviate
The weight of dividing plate, thus reduce energy loss.Other composition and annexation and detailed description of the invention 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: when the eddy current of the present invention is to be placed in time-varying magnetic field by field generator for magnetic, in conductor
Can evoke induced electric field, in conductor, electronics will form electric current under the driving of induced electric field, owing to this electric current is Guan Bi electricity
Stream, is therefore eddy current.The present invention uses sensing heating to utilize eddy heating for heating metallic conductor exactly, 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, relies on
The internal resistance of material itself, is allowed to generate heat rapidly, to evaporate the water droplet on dividing plate or moisture film.
The present invention in actual use, in order to ensure that the normal of steam turbine effectively runs, prevent steam turbine rotate every
Plate, in using eddy-current heating dehumidification process, causes the shadow that the serviceability to other components of Steam Turbine causes because temperature is too high
Ringing, be respectively adopted the intensity reinforcing ring increasing varying number on outer shroud, size and size to intensity reinforcing ring are also carried out
Adjusting, the heat that above-mentioned parameter produces for eddy current all has an impact, and the temperature of the eddy current generation after adjustment answers 200 DEG C-250
℃。
Such as: a rated power is the small steam turbine of 850kW, steam quality is required the widest, 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
It is arranged in the annular groove of outer shroud with a reinforcing ring, uses field generator for magnetic, with the electromagnetic eddy temperature that this produces be
220-230 DEG C, it is possible to water droplet is 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 present invention, and is applied in the NM field of the present invention, and certainly, these depend on
The change done according to present invention spirit all should be included in scope of the present invention.
Claims (4)
1. a steam turbine rotary spacing plate, it includes internal ring (1), outer shroud (2) and nozzle vane (3), internal ring (1) and outer shroud (2)
Between by nozzle vane (3) connect, it is characterised in that: it also includes field generator for magnetic (6) and intensity reinforcing ring (7), outward
Cavity (4) and multiple pod apertures (5) connected with cavity (4), field generator for magnetic is offered along its circumferencial direction on ring (2)
(6) it is arranged on the outside of outer shroud (2), and the magnetic field making field generator for magnetic (6) produce penetrates the sides adjacent ring body of outer shroud (2),
Intensity reinforcing ring (7) is sleeved on the outer circle wall of outer shroud (2).
Steam turbine the most according to claim 1 is every dividing plate, it is characterised in that: field generator for magnetic (6) is multiple and multiple
Field generator for magnetic (6) is distributed along the even circumferential of outer shroud (2).
Steam turbine rotary spacing plate the most according to claim 2, it is characterised in that: intensity reinforcing ring (7) is nonferromagnetic material
Material is made.
Steam turbine rotary spacing plate the most according to claim 3, it is characterised in that: pod apertures (5) is opened near nozzle leaf
Sheet (3) side.
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 true CN106194292A (en) | 2016-12-07 |
| CN106194292B CN106194292B (en) | 2018-03-20 |
Family
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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106194292B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542210A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Positioning structure of steam turbine clapboard retaining ring |
Citations (7)
| 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 |
| 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 |
| CN103383047A (en) * | 2013-07-29 | 2013-11-06 | 杭州信多达电器有限公司 | Electromagnetic heating device for spiral pipeline |
| 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 |
| 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 |
| CN103953397A (en) * | 2014-04-21 | 2014-07-30 | 哈尔滨汽轮机厂有限责任公司 | Last-stage dehumidifying stator blade of high-power turbine |
-
2016
- 2016-08-31 CN CN201610794901.1A patent/CN106194292B/en active Active
Patent Citations (7)
| 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 |
| 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 |
| CN103383047A (en) * | 2013-07-29 | 2013-11-06 | 杭州信多达电器有限公司 | Electromagnetic heating device for spiral pipeline |
| 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 |
| 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 |
| CN103953397A (en) * | 2014-04-21 | 2014-07-30 | 哈尔滨汽轮机厂有限责任公司 | Last-stage dehumidifying stator blade of high-power turbine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542210A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Positioning structure of steam turbine clapboard retaining ring |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106194292B (en) | 2018-03-20 |
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