CN106030048A - Heatable push rod for a steam turbine - Google Patents
Heatable push rod for a steam turbine Download PDFInfo
- Publication number
- CN106030048A CN106030048A CN201580010261.4A CN201580010261A CN106030048A CN 106030048 A CN106030048 A CN 106030048A CN 201580010261 A CN201580010261 A CN 201580010261A CN 106030048 A CN106030048 A CN 106030048A
- Authority
- CN
- China
- Prior art keywords
- housing
- rotor
- push rod
- vapours
- 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.)
- Granted
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)
- Control Of Turbines (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to an arrangement comprising a steam turbine (1) consisting of different sub-turbines (2a, 2b, 2c, 2d). Each sub-turbine (2a, 2b, 2c, 2d) has a rotor and a housing (15, 16), and during operation, a movement of one housing (15, 16) as a result of a thermal expansion of the rotor (12, 13) is followed, due to the rigid coupling of the housings by means of a push rod (17), by a movement of the other housing. The push rod (17) has a hollow design, and a thermal expansion is allowed by supplying the cavity with heated steam. The supply and discharge of the heated steam is regulated by the thermal expansion of the rotor (12, 13).
Description
Technical field
The present invention relates to a kind of device, described device includes having the of the first rotor and the first housing
One sub-turbine, there is the second sub-turbine and push rod of the second rotor and the second housing, described
First housing and the second housing are connected to each other by push rod.
Additionally, the present invention relates to a kind of method for running steam turbine, wherein steam turbine bag
Include the sub-turbine of at least two, its neutron turbine be respectively provided with housing and rotor and housing via
Push rod is coupled to each other.
Background technology
Steam turbine is generally of many sub-turbines and designs for following steam parameter, institute
State steam parameter in the case of pressure is 350bar until 630 DEG C.The highest steam parameter is
Challenge to whole steam turbine.Thermal expansion effects causes the gap between housing and rotor to increase
Or reduce.The axle system of steam turbine is in operation can be than housing thermal expansion more.By
In must be allowed for this axial dipole field, and the shape of the part conic due to housing, obtain higher
Clearance loss.Therefore, housing parts is coupled to each other by means of push rod.This represent, by with push away
The rigidity of bar couples, and the motion of a housing causes the motion of adjacent housings, and these housings are via pushing away
Bar is connected to each other.According to prior art, push rod keeps its length so that this outer rotor is due to it relatively
High temperature stands the axial dipole field relative to housing.
By hydraulic system, the axial dipole field of housing can be matched with the position of axle.Certainly, this
The system actively controlled has following shortcoming, in the case of thrashing, may make turbine
Damage, because decreasing for reducing the gap allowance in gap.
It is known that heat push rod from EP 2 554 801 A1, whereby via the thermal expansion of push rod,
Housing can be relative to rotor motion.
By the reduction of axial dipole field, it is possible to the increase of the turbine efficiency within Shi Xianing.
Summary of the invention
Therefore, it is an object of the invention to, improve turbine efficiency.
Described purpose is realized by a kind of device, and described device includes having the first rotor and first
First sub-turbine of housing, there is the second rotor and the second sub-turbine of the second housing and push away
Bar, the first housing and the second housing are connected to each other by described push rod, and wherein push rod is constituted hollowly,
Wherein supply steam channel has vapours outlet, and wherein vapours outlet can be by first or the
Two rotors are closed and open, and wherein the first and/or second rotor has the first area of the first radius,
And vapours outlet is closed or opened in first area due to the thermal expansion of rotor.
Additionally, described purpose is realized by a kind of method for running steam turbine, Qi Zhongzheng
Steam turbine includes that the sub-turbine of at least two, the most every sub-turbine are respectively provided with housing and turn
Son, its middle shell is coupled to each other via push rod and push rod is constituted hollowly, and wherein vapours flows into
For making push rod thermal expansion in cavity.
The present invention follows following manner, heats push rod, in order to it is possible to realize the thermal expansion of push rod.
By the length extending of push rod, obtain other parameter, in order to by housing and rotor part optimally
It is positioned relative to.Main idea is that, the push rod constituted hollowly is loaded with heat steaming
Vapour.Described vapours can be extracted on suitable position from steam turbine.
The heating of push rod disorderly but is entered with the position of rotary body relatively according to the present invention is non-
OK.Vapours entrance or outlet should be positioned to so that move at housing and correspond roughly to rotor movement
Time, described vapours entrance or outlet are stopped by rotor.
The scheme that is advantageously improved is given in the dependent claims.
Being advantageously improved in scheme first, device is constituted supply steam channel and supply steam
Source, described supply vapour source is structured to supply steam, wherein push rod in supply steam channel
Cavity via supply steam channel with supply vapour source fluidly connect.
Supply vapour source can be such as the steam coming from technical process, the useless steaming of the most sub-turbine
Vapour.Described steam is directed in the cavity of push rod via supply steam channel and then causes thermal expansion.
Advantageously, supply steam channel is arranged in the first and/or second housing.
Supply steam channel can regard as having the hole that vapours exports with first approximation.According to this
Invention, the outlet of described vapours can be covered by rotor.When steam turbine puts into operation, turn
Son can expand and then exposed hole, and this causes, and vapours outlet is opened and then can will go out to automatically supply
The cavity of the vapours supply push rod of steam channel.By the expansion of push rod, necessarily carry out housing
Motion, this can be used, and is exported by the blind hole again of the covering by rotor or vapours.
Accompanying drawing explanation
The feature being described above of the present invention, feature and advantage and realize described feature, spy
The ways and means of advantage of seeking peace combine following embodiment is described in understanding be apparent from and
Clear, described embodiment combines accompanying drawing and elaborates.
Below according to accompanying drawing, embodiments of the invention are described.Described accompanying drawing should not be shown to scale reality
Execute example, more precisely, accompanying drawing is being of value to the position of elaboration with that illustrate and/or slight distortion
Form explain.Supplementing about the teaching can being immediately seen in the accompanying drawings, existing with reference to be correlated with
Technology.
Accompanying drawing illustrates:
Fig. 1 illustrates the cross-sectional view of steam turbine；
Fig. 2 illustrates the side view according to assembly of the invention；
Fig. 3 illustrates the side view according to assembly of the invention；
Fig. 4 illustrates the side view according to assembly of the invention；
Fig. 5 illustrates the side view according to assembly of the invention.
Detailed description of the invention
Fig. 1 illustrates steam turbine 1 with cross-sectional view.Steam turbine include the first sub-turbine 2a,
Second sub-turbine 2b, the 3rd sub-turbine 2c and the 4th sub-turbine 2d.First sub-turbine
2a is configured to higher pressure subsidiary turbine and has higher pressure steam inlet 3 and higher pressure steam outlet 4.Newly
Fresh steam flows to higher pressure steam outlet 4 from higher pressure steam inlet 3 through vane group 5.At steam stream
After crossing higher pressure subsidiary turbine, described steam is heated also in intermediate heater (not shown)
And it being drawn towards the middle pressure steam entrance 6 of the second sub-turbine 2b, described second sub-turbine is constituted
For the sub-turbine of middle pressure.Middle pressure sub-turbine double fluid ground is constituted.Steam is via middle pressure steam entrance 6
Middle pressure steam outlet 8 is flowed to through middle pressure vane group 7.Steam is therefrom via overflowing of being shown without
Flow tube road flows to be configured to the low-pressure steam inlet 9 of sub-turbine 2c and 2d of lower pressure subsidiary turbine.
Steam flows to low-pressure steam outlet 11 and therefrom via corresponding low pressure blade group 10 therefrom
Flow to the condenser being not illustrated in detail.
Second sub-turbine 2b includes rotor 12.The most sub-turbine 2a but also sub-turbine 2c
Include rotor 13 respectively with 2d, its rotor 12,13 by means of rigidity coupling arrangement 14 that
This couples.Around rotor 12, housing 15 is set.Housing 15 is the first housing 15, and rotor 12 is
The first rotor 12.Lower pressure subsidiary turbine 2c includes rotor 13 (the second rotor 13) and the second housing
16.Being in operation, rotor 12,13 expands, and this can cause rotor 12,13 and housing 15
Between the gap of increase.In order to reduce gap, between the first housing 15 and the second housing 16
It is provided with push rod 17.
Being in operation, rotor 12,13 generally rotates with 50Hz or 60Hz and drives electromotor
18, described electromotor the most symbolically illustrates.Push rod 17 constitutes hollowly and then has
Cavity, described cavity is had to be not illustrated in detail in FIG.
Fig. 2 illustrates the side view of a part for the steam turbine 1 in Fig. 1.The first rotor 13 encloses
Rotate around rotation axis 19 and be arranged on the first housing 15 opposite.Rotor 13 has the first half
Footpath R1 and the second radius R2, wherein R1 ＞ R2.From radius R1, the transition to radius R2 is basic
On carry out discontinuously and at seamed edge 20 shown in the region of transition.First housing 15 has confession
To steam channel 21, first by under described supply steam channel running status shown in figure 2
One rotor 13 covers.Supply steam channel 21 has vapours outlet 22, and described vapours exports
It is completely covered at seamed edge 20 so that do not have vapours to flow.Vapours such as can
From technical process, extract and can be such as the exhaust steam of sub-turbine 2b.Rotor 13 has
The end face 27 of annular.
Fig. 3 illustrates the state illustrated compared with Fig. 2, i.e. at run duration under the transient state
State.Difference with Fig. 2 is, rotor 13 thermal expansion by loading process steam, more really
Say with cutting with value Δ XAxle23 thermal expansions.Seamed edge 20 is made to discharge now vapours here, expand
Outlet 22, to such an extent as to vapours can flow out from supply steam channel 21.For more preferable general view,
State in Fig. 2 24 illustrates by a dotted line.
The vapours flowed out from supply steam channel 21 is drawn towards push rod 17 and there can be by
It is directed in cavity.Thus, push rod 17 expands, and causes housing 15,16 to move.
Being exemplarily illustrated in the diagram, how the motion of housing 15 is carried out.Housing 15 is with value
ΔXHousing25 motions following axle.Due to general view, the state of the housing in Fig. 3 is symbolically made
It is that the second dotted line 26 illustrates.Under the state that figure 4 illustrates, housing 15 pushing away via thermal expansion
The motion of bar 17 makes substantially value 23 big as value 25.This represents, Δ XHousingAbout
Equal to Δ XAxle.As seen in Figure 4, thus rotor 13 or housing are passed through in vapours outlet 22
15 close again.Therefore, vapours is no longer flow towards push rod 17 and again avoids the fortune of housing 15
Dynamic.Thus, flowing in or out relative to push rod 17 is controlled.Therefore, whole system has solid
Some stability, because the skew of rotary body is followed in the skew of housing 15,16 all the time, and to this
Need not auxiliary energy.Thus, the inefficacy of this control is almost got rid of.
Fig. 5 illustrates another enforcement of the local illustrated in figures 2,3, and 4 of steam turbine 1
Mode.The device that figure 5 illustrates is with the difference of Fig. 2,3 and 4, and housing 15 is at rotor
The region of the seamed edge 20 of 13 is conically constituted so that rotor equally must at seamed edge upper conically
Structure, in order to avoid rotor 13 to skim on housing 15.Due to general view, the most only show
Going out running status, wherein vapours outlet 22 is covered by rotor 13 completely so that vapours can not
Enough outflows from supply steam channel 21.Supply steam channel 21 is connected with supply vapour source.Supply
It is not illustrated in detail to vapour source.Supply vapour source can be such as available process steam or example
The exhaust steam of the most sub-turbine.Transition on the seamed edge 20 of rotor 13 is from radius R1 to half
Footpath R2 is carried out discontinuously so that occur that end face 27, described end face are arranged essentially parallel to radius
R1 or R2.Described end face 27 not necessarily must be parallel to radius R1 or R2 and constructs, but energy
Enough angles to be not illustrated in detail tilt relative to radius R1 or R2.Meaningfully, rib
Limit 20 can completely enclose vapours outlet 22.
Although being explained and describe the present invention by preferred embodiment, but the present invention being not
It is confined to disclosed example, and other variations therefrom can be pushed away by those skilled in the art
Derive, without deviating from protection scope of the present invention.
Claims (12)
1. a device, including:
There is the first sub-turbine (2a) of the first rotor (13) and the first housing (15),
There is the second sub-turbine (2b) of the second rotor (12) and the second housing (16), and
Push rod (17), described push rod is by described first housing (15) and described second housing (16)
It is connected to each other,
Wherein said push rod (17) is constituted hollowly,
It is characterized in that,
Supply steam channel (21) has vapours outlet (22),
Wherein said vapours outlet (22) can be by described the first rotor (12) or described the
Two rotors (13) are closed and are opened,
Wherein said the first rotor (12) and/or the second rotor (13) have first area, institute
State first area and there is the first radius (R1), and described first area is due to rotor (13,14)
Thermal expansion close or open described vapours outlet (22).
Device the most according to claim 1,
Described device has supply steam channel (21) and supply vapour source,
Described supply vapour source is structured to supply heat in described supply steam channel (21) and steams
Vapour,
The cavity of wherein said push rod (17) is via described supply steam channel (21) and described confession
Fluidly connect to vapour source.
Device the most according to claim 2,
Wherein said supply steam channel (21) is arranged on described first housing (15) and/or institute
State in the second housing (16).
Device the most according to any one of claim 1 to 3,
Wherein said vapours outlet (22) can be by described first housing (15) or described the
Two housings (16) are closed and are opened.
Device the most according to claim 4,
Wherein said vapours exports the closing of (22) and opens via described first housing (15)
Or the described thermal expansion of the second housing (16) and/or the thermal expansion of described push rod (17) enter
OK.
Device the most according to any one of claim 1 to 5,
Wherein said second rotor (13) has second area, and described second area has radius
(R2), that be wherein suitable for is R1＞ R2。
Device the most according to any one of claim 1 to 6,
Wherein said first housing (15) and/or described second housing (16) are in described vapours
The region of outlet (22) is conically constituted.
Device the most according to claim 7,
Wherein said the first rotor (12) and/or described second rotor (13) are in described vapours
The region of outlet (22) is conically constituted.
9. the method being used for running steam turbine (1),
Wherein said steam turbine (1) includes the sub-turbine of at least two (2a, 2b, 2c, 2d),
Its neutron turbine (2a, 2b, 2c, 2d) is respectively provided with housing (15,16) and rotor
(12,13),
Wherein said housing (15,16) is coupled to each other via push rod (17), and described push rod
(17) constitute hollowly,
During wherein vapours is flowed into described cavity, for making described push rod (17) thermal expansion.
Method the most according to claim 9,
Wherein vapours supply steam channel (21) from described housing (15,16) flows out,
Wherein closed due to thermal expansion by the first area of described rotor or open described heat and steam
Vapor outlet (22), described rotor (12,13) can terminate and open the flowing of described vapours.
11. methods according to claim 10,
Wherein, terminate and open and carry out via the thermal expansion of described rotor (13,14).
12. according to the method according to any one of claim 9 to 11,
Wherein said supply steam channel (21) can be via the motion of described housing (15,16)
Close.
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 true CN106030048A (en) | 2016-10-12 |
| CN106030048B 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 |
|---|---|
| CN106030048B (en) | 2018-09-07 |
| 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 |