CN106030048B - Heatable push rod for steam turbine - Google Patents
Heatable push rod for steam turbine Download PDFInfo
- Publication number
- CN106030048B CN106030048B CN201580010261.4A CN201580010261A CN106030048B CN 106030048 B CN106030048 B CN 106030048B CN 201580010261 A CN201580010261 A CN 201580010261A CN 106030048 B CN106030048 B CN 106030048B
- Authority
- CN
- China
- Prior art keywords
- shell
- rotor
- steam
- push rod
- turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- F01D25/26—Double casings; Measures against temperature strain in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/50—Intrinsic material properties or characteristics
- F05D2300/502—Thermal properties
- F05D2300/5021—Expansivity
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
Abstract
The present invention relates to a kind of devices, described device includes by different sub- turbine (2a, 2b, 2c, 2d) the steam turbine (1) constituted, wherein every sub- turbine (2a, 2b, 2c, 2d) there is rotor and shell (15, 16), wherein in operation, due to rotor (12, 13) thermal expansion, shell (15, 16) movement is carried out by shell by means of the rigid attachment of push rod (17), wherein push rod (17) is hollowly constituted, and by supplying cavity hot steam, thermal expansion is possible, wherein the control of hot steam flowed in and out is via rotor (12, 13) thermal expansion carries out.
Description
Technical field
The present invention relates to a kind of device, described device include the first sub- turbine with the first rotor and first shell,
The second sub- turbine with the second rotor and second shell and push rod, the push rod by first shell and second shell each other
Connection.
In addition, the present invention relates to a kind of method for running steam turbine, wherein steam turbine includes at least two sons
Turbine, neutron turbine is respectively provided with shell and rotor and shell is coupled to each other via push rod.
Background technology
Steam turbine is usually designed with multiple sub- turbines and for following steam parameters, and the steam parameter exists
Until 630 DEG C in the case that pressure is 350bar.Steam parameter high in this way is the challenge to entire steam turbine.Thermally expand effect
The gap between shell and rotor should be caused to increase or reduce.The shafting of steam turbine in operation can be than shell bigger
Degree thermal expansion.Due to must be allowed for this axial dipole field, and the shape of the part conic due to shell, obtain higher
Clearance loss.Therefore, housing parts are coupled to each other by means of push rod.This is indicated, is coupled by the rigidity with push rod, a shell
Movement cause the movements of adjacent housings, these shells to be connected to each other via push rod.According to the prior art, push rod keeps its length
Degree so that this outer rotor is subjected to the axial dipole field relative to shell due to its higher temperature.
By hydraulic system, the axial dipole field of shell can be matched with the position of axis.Certainly, the system of this active control
Have the shortcomings that following, in the case of thrashing, turbine damage may be made, because of the gap allowance for reducing gap
Reduce.
It is known that heating push rod, whereby via the thermal expansion of push rod, shell being capable of phase from 2 554 801 A1 of EP
For rotor motion.
By the reduction of axial dipole field, the increase of internal turbine efficiency can be realized.
Invention content
Therefore, the purpose of the present invention is to improve turbine efficiency.
The purpose realizes that described device includes having the first rotor and the first son of first shell by a kind of device
Turbine, the with the second rotor and second shell second sub- turbine and push rod, the push rod is by first shell and second
Shell is connected to each other, and wherein push rod is hollowly constituted, wherein supply steam channel is exported with hot steam, wherein hot steam exports
It can close and open by first or second rotor, wherein the first and/or second rotor has the first area of the first radius,
And thermal expansion closing or opening hot steam outlet of the first area due to rotor.
In addition, the purpose is realized by a kind of for running the method for steam turbine, wherein steam turbine includes extremely
Few two sub- turbines, wherein every sub- turbine is respectively provided with shell and rotor, middle casing is coupled to each other simultaneously via push rod
And push rod is hollowly constituted, wherein hot steam is flowed into cavity for making push rod thermally expand.
The present invention follows following manner, push rod is heated, so that thus, it is possible to realize the thermal expansion of push rod.By the length of push rod
Degree stretching, extension, obtains other parameters, so that shell and rotor part to be optimally positioned relative to each other.The main think of of the present invention
Think it is that the push rod hollowly constituted is loaded with hot steam.The hot steam can carry on position appropriate from steam turbine
It takes.
The heating of push rod according to the present invention it is non-disorderly but relatively carried out with the position of rotary body.Hot steam entrance
Or outlet should be positioned to so that when shell movement corresponds roughly to rotor movement, the hot steam entrance or outlet are by turning
Son blocking.
Scheme is advantageously improved to provide herein.
It is advantageously improved in scheme first, device composition has supply steam channel and supply vapour source, the supply to steam
Vapour source is structured to supply steam in supplying steam channel, and wherein the cavity of push rod is steamed via supply steam channel and supply
Vapour source fluidly connects.
It for example can be to come from the steam of technical process, such as the exhaust steam of sub- turbine to supply vapour source.The steam
It is directed in the cavity of push rod via supply steam channel and then causes to thermally expand.
Advantageously, supply steam channel is arranged in first and/or second shell.
Supply steam channel can regard as the hole that there is hot steam to export with first approximation.According to the present invention, the heat
Steam (vapor) outlet can be covered by rotor.When steam turbine puts into operation, rotor can expand and then exposed hole, this causes,
It opens and then the hot steam for going out to automatically supply steam channel can be supplied to the cavity of push rod in hot steam outlet.Pass through the swollen of push rod
It is swollen, the movement of shell is necessarily carried out, this can be used for, and blind hole or hot steam export again by the covering by rotor.
Description of the drawings
The characteristics of being described above of the present invention, feature and advantage and the side for realizing the feature, feature and advantage
Formula and method are apparent from conjunction with the following description to embodiment in understanding and clear, and the embodiment combination attached drawing is explained in detail
It states.
The embodiment of the present invention is described below according to attached drawing.Embodiment should not be shown to scale in the attached drawing, more precisely
Say that attached drawing is explained in the position for being beneficial to illustrate in the form of illustrate and/or slight distortion in ground.About in the accompanying drawings can be direct
The supplement for the introduction seen, with reference to the relevant prior art.
Attached drawing is shown：
Fig. 1 shows the cross-sectional view of steam turbine；
Fig. 2 shows the side views of the apparatus according to the invention；
Fig. 3 shows the side view of the apparatus according to the invention；
Fig. 4 shows the side view of the apparatus according to the invention；
Fig. 5 shows the side view of the apparatus according to the invention.
Specific implementation mode
Fig. 1 shows steam turbine 1 with cross-sectional view.Steam turbine include the first sub- turbine 2a, the second sub- turbine 2b,
The sub- sub- turbine 2d of turbine 2c and the 4th of third.First sub- turbine 2a is configured to higher pressure subsidiary turbine and is steamed with high pressure
Vapour entrance 3 and higher pressure steam outlet 4.Live steam flows to higher pressure steam outlet 4 from higher pressure steam inlet 3 across blade group 5.
Steam stream is crossed after higher pressure subsidiary turbine, and the steam is heated in intermediate heater (not shown) and is led to second
The middle pressure steam entrance 6 of sub- turbine 2b, the second sub- turbine mechanism become the middle sub- turbine of pressure.The middle sub- turbine double fluid of pressure
Ground is constituted.Steam flows to middle pressure steam outlet 8 via middle pressure steam entrance 6 across middle pressure blade group 7.Steam is not therefrom via having
There is the overflow passage shown flow direction to be configured to the low-pressure steam inlet 9 of the sub- turbine 2c and 2d of lower pressure subsidiary turbine.Steam from
There flows to low-pressure steam outlet 11 via corresponding low pressure blade group 10 and flows to the condensation being not illustrated in detail therefrom
Device.
Second sub- turbine 2b includes rotor 12.Not only sub- turbine 2a but also sub- turbine 2c and 2d respectively includes rotor
13, wherein rotor 12,13 is coupled to each other by means of the coupling arrangement 14 of rigidity.Around rotor 12, shell 15 is set.Shell 15 is
First shell 15, rotor 12 are the first rotors 12.Lower pressure subsidiary turbine 2c includes rotor 13 (the second rotor 13) and second shell
16.In operation, rotor 12,13 expands, this can cause the increased gap between rotor 12,13 and shell 15.In order to subtract
Small―gap suture is provided with push rod 17 between first shell 15 and second shell 16.
In operation, rotor 12,13 is usually rotated with 50Hz or 60Hz and generator 18, the generator is driven to scheme
It is only symbolically shown in 1.Push rod 17 hollowly constitutes and then there is cavity, the cavity to be not illustrated in detail in Fig. 1.
Fig. 2 shows the side views of a part for the steam turbine 1 in Fig. 1.The first rotor 13 is rotated around rotation axis 19
And it is arranged on 15 opposite of first shell.Rotor 13 has the first radius R1 and the second radius R2, wherein R1 ＞ R2.From radius R1
Transition to radius R2 substantially discontinuously carries out and shows seamed edge 20 in the region of transition.First shell 15, which has, to be supplied
To steam channel 21, covered first by the first rotor 13 under supply steam channel operating status shown in figure 2.Supply
There is steam channel 21 hot steam to export 22, and the hot steam outlet is completely covered at seamed edge 20 so that does not have hot steam
It can flow.The exhaust steam of sub- turbine 2b for example can be extracted from technical process and for example can be to hot steam.Rotor
13 have the end face 27 of annular.
Fig. 3 shows the state shown compared with Fig. 2, i.e., state during operation under the transient state.With the area of Fig. 2
It is not, rotor 13 is thermally expanded by loading process steam, more specifically with magnitude Δ XAxis23 thermally expand.Here, expansion
So that the release hot steam outlet 22 now of seamed edge 20, so that hot steam can be flowed out from supply steam channel 21.In order to more preferable
General view, the state in Fig. 2 24 shows by a dotted line.
The hot steam flowed out from supply steam channel 21 is led to push rod 17 and can be directed into cavity there.
Push rod 17 expands as a result, causes shell 15,16 that can move.
It is exemplarily illustrated in Fig. 4, how the movement of shell 15 carries out.Shell 15 is with magnitude Δ XShell25 follow axis
Movement.Due to general view, the state of the shell in Fig. 3 is symbolically shown as the second dotted line 26.The state being shown in FIG. 4
Under, shell 15 makes substantially magnitude 23 and magnitude 25 same big via the movement of the push rod 17 of thermal expansion.This expression, Δ XShell
Approximately equal to Δ XAxis.As seen in Figure 4, thus hot steam outlet 22 is closed again by rotor 13 or shell 15.Therefore, hot
Steam is no longer flow towards push rod 17 and avoids the movement of shell 15 again.Flowing in or out relative to push rod 17 is controlled as a result,.
Therefore, whole system has intrinsic stability, because the offset of shell 15,16 follows the offset of rotary body always, and to this
Auxiliary energy is not needed.The failure of this control is almost excluded as a result,.
Fig. 5 shows the another embodiment for the part of steam turbine 1 shown in figures 2,3, and 4.It is shown in FIG. 5
Device difference lies in shell 15 is conically constituted in the region of the seamed edge 20 of rotor 13 so that rotor with Fig. 2,3 and 4
Equally must seamed edge it is upper conical construct, to avoid rotor 13 from being skimmed on shell 15.Due to general view, in Figure 5 only
Show that operating status, wherein hot steam outlet 22 are covered by rotor 13 completely so that hot steam can not be from supply steam channel
It is flowed out in 21.Supply steam channel 21 is connect with supply vapour source.Supply vapour source is not illustrated in detail.Supply vapour source for example
Process steam can be available such as it is the exhaust steam of sub- turbine.Transition on the seamed edge 20 of rotor 13 is from radius
R1 to radius R2 is discontinuously carried out so that end face 27 occurs, the end face is arranged essentially parallel to radius R1 or R2.The end face
27 not necessarily must be parallel to radius R1 or R2 construction, but can be with the angle that is not illustrated in detail relative to radius R1 or R2
It tilts.Significantly, seamed edge 20 can completely enclose hot steam outlet 22.
Although explaining and describing the present invention in detail by preferred embodiment, the present invention is not limited to disclosed
Example, and other variations can therefrom be derived by those skilled in the art, without departing from the protection model of the present invention
It encloses.
Claims (8)
1. a kind of device for steam turbine, including：
The first sub- turbine (2a) with the first rotor and first shell (15),
The second sub- turbine (2b) with the second rotor and second shell (16), and
The first shell (15) and the second shell (16) are connected to each other by push rod (17), the push rod,
The wherein described push rod (17) is hollowly constituted,
It is characterized in that,
Described device has supply steam channel (21) and supply vapour source,
Wherein the supply steam channel (21) be arranged in the first shell (15) and/or the second shell (16) and
(22) are exported with hot steam,
The wherein described supply vapour source is structured to supply hot steam in the supply steam channel (21),
The wherein described hot steam outlet (22) can be closed and open by the first rotor or second rotor,
The cavity of the wherein described push rod (17) is fluidly connected via the supply steam channel (21) and the supply vapour source.
2. the apparatus according to claim 1,
The wherein described hot steam outlet (22) can be closed and beat by the first shell (15) or the second shell (16)
It opens.
3. the apparatus of claim 2,
The closing of the wherein described hot steam outlet (22) and opening are via the first shell (15) the or described second shell
(16) thermal expansion of thermal expansion and/or the push rod (17) carries out.
4. device according to any one of claim 1 to 3,
The wherein described first shell (15) and/or the second shell (16) taper in the region that the hot steam exports (22)
Ground is constituted.
5. device according to claim 4,
The wherein described the first rotor and/or second rotor are conically constituted in the region that the hot steam exports (22).
6. method of the one kind for running steam turbine (1),
The wherein described steam turbine (1) includes at least two sub- turbines (2a, 2b, 2c, 2d),
Its neutron turbine (2a, 2b, 2c, 2d) is respectively provided with shell (15,16) and rotor (12,13),
The wherein described shell (15,16) is coupled to each other via push rod (17), and the push rod (17) is hollowly constituted,
Wherein hot steam is flowed into the cavity of the push rod (17), for making the push rod (17) thermally expand,
Wherein hot steam outflow from the supply steam channel (21) in the shell (15,16), and
The hot steam outlet (22), the rotor (12,13) are wherein closed or opened due to thermal expansion by the rotor
It can terminate and open the flowing of the hot steam.
7. according to the method described in claim 6,
Wherein, terminate and open to carry out via the thermal expansion of the rotor (12,13).
8. the method described according to claim 6 or 7,
The wherein described supply steam channel (21) can be closed via the movement of the shell (15,16).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14156366.8A EP2910741A1 (en) | 2014-02-24 | 2014-02-24 | Heatable push rod for a steam turbine |
| EP14156366.8 | 2014-02-24 | ||
| PCT/EP2015/050630 WO2015124333A1 (en) | 2014-02-24 | 2015-01-15 | Heatable push rod for a steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106030048A CN106030048A (en) | 2016-10-12 |
| CN106030048B true CN106030048B (en) | 2018-09-07 |
Family
ID=50190213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580010261.4A Expired - Fee Related CN106030048B (en) | 2014-02-24 | 2015-01-15 | Heatable push rod for steam turbine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2910741A1 (en) |
| CN (1) | CN106030048B (en) |
| WO (1) | WO2015124333A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995473A (en) * | 1962-05-30 | 1965-06-16 | Rateau Soc | Turbine with double-casing low-pressure cylinder |
| CN1225705A (en) * | 1996-07-24 | 1999-08-11 | 西门子公司 | Turbine installation with pushing element and pushing element for turbine installation |
| US6092986A (en) * | 1996-07-24 | 2000-07-25 | Siemens Aktiengesellschaft | Turbine plant having a thrust element, and thrust element |
| CN101660431A (en) * | 2008-08-29 | 2010-03-03 | 通用电气公司 | System and method for adjusting clearance in a gas turbine |
| EP2554801A1 (en) * | 2011-08-02 | 2013-02-06 | Siemens Aktiengesellschaft | A turbine system comprising a push rod arrangement between two housings |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1216322B (en) * | 1962-05-30 | 1966-05-12 | Creusot Forges Ateliers | Steam or gas turbine with several turbine sections arranged coaxially one behind the other |
| GB1145612A (en) * | 1966-04-12 | 1969-03-19 | Licentia Gmbh | Improvements relating to steam turbines |
-
2014
- 2014-02-24 EP EP14156366.8A patent/EP2910741A1/en not_active Withdrawn
-
2015
- 2015-01-15 WO PCT/EP2015/050630 patent/WO2015124333A1/en active Application Filing
- 2015-01-15 CN CN201580010261.4A patent/CN106030048B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995473A (en) * | 1962-05-30 | 1965-06-16 | Rateau Soc | Turbine with double-casing low-pressure cylinder |
| CN1225705A (en) * | 1996-07-24 | 1999-08-11 | 西门子公司 | Turbine installation with pushing element and pushing element for turbine installation |
| US6092986A (en) * | 1996-07-24 | 2000-07-25 | Siemens Aktiengesellschaft | Turbine plant having a thrust element, and thrust element |
| CN101660431A (en) * | 2008-08-29 | 2010-03-03 | 通用电气公司 | System and method for adjusting clearance in a gas turbine |
| EP2554801A1 (en) * | 2011-08-02 | 2013-02-06 | Siemens Aktiengesellschaft | A turbine system comprising a push rod arrangement between two housings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106030048A (en) | 2016-10-12 |
| WO2015124333A1 (en) | 2015-08-27 |
| EP2910741A1 (en) | 2015-08-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: David Felvo Inventor before: David clings to Er Kesiji |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180907 Termination date: 20220115 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |