CN108204252A - The cylinder of steam turbine - Google Patents
The cylinder of steam turbine Download PDFInfo
- Publication number
- CN108204252A CN108204252A CN201611184996.1A CN201611184996A CN108204252A CN 108204252 A CN108204252 A CN 108204252A CN 201611184996 A CN201611184996 A CN 201611184996A CN 108204252 A CN108204252 A CN 108204252A
- Authority
- CN
- China
- Prior art keywords
- inner casing
- steam
- side inner
- casing section
- sealing element
- 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
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
Abstract
The present invention provides a kind of cylinder of steam turbine, it includes outer shell and the inner casing being placed in outer shell, the rotor of steam turbine is threaded through in inner casing, the outer shell and inner casing are filled the span of a man's arms by two semicircle circumferential portions to be spliced, two semicircle circumferential portions of the inner casing are divided into steam admission side inner casing section and steam output side inner casing section in an axial direction, steam admission side inner casing section is connected with steam output side inner casing section by sealing element sealing, and the round part that the sealing element is closed for annular, by two semicircle circumferential portion integral sealings of the inner casing.The good seal performance of the present invention is conducive to improve steam end efficiency, reduces cylinder manufacture cost.
Description
Technical field
The present invention relates to steam turbine technology field, more particularly to a kind of cylinder of steam turbine.
Background technology
According to document, " thermal power plant Hardware Description Manual-volume Two-steam turbine, China Machine Press, 1998 " is described
Steam turbine, the inner casing in steam turbine is divided into monoblock type inner casing and segmented inner casing.Monoblock type inner casing is the normal of inner cylinder
See form, but the size of monoblock type inner casing is big, cost is big, and manufacture and transport difficulty are big.Segmented inner casing is readily produced manufacture,
As shown in Figure 1, cylinder includes outer shell 2 and inner casing, and rotor 1 is threaded through in inner casing, and inner casing is segmentation structure, by steam admission side inner casing
Section 31 and steam output side inner casing section 32 are formed, and are detached between each segmentation, form steaming chamber, and pass through the sealing of inner casing and outer shell
Connect (dotted line frame in Fig. 1) and realize sealing between chamber, but due between two chambers there are the larger temperature difference, in dotted line frame
Axial seal and mid-separate surface seal it is poor；Meanwhile in shutdown process, stress is larger, easily leaks vapour.
Therefore, it is necessary to a kind of good seal performance, the cylinders of efficient steam turbine.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of cylinders of steam turbine, use
In solve the problems, such as in the prior art steam end efficiency it is low, manufacture it is of high cost.
In order to achieve the above objects and other related objects, the present invention provides a kind of cylinder of steam turbine, including outer shell and
The inner casing being placed in outer shell, the rotor of steam turbine are threaded through in inner casing, and the outer shell and inner casing are closed by two semicircle circumferential portions
It embraces and is spliced, two semicircle circumferential portions of the inner casing are divided into steam admission side inner casing section and steam output side inner casing section in an axial direction, into
Vapour side inner casing section is connected, and the round part that the sealing element is closed for annular with steam output side inner casing section by sealing element sealing, will
Two semicircle circumferential portion integral sealings of the inner casing.
Preferably, the sealing means of the sealing element are by the steam admission side inner casing section and the intersegmental edge of steam output side inner casing
The radial direction of the rotor is sealed.
Preferably, the side that the steam admission side inner casing section is connected with the steam output side inner casing section have protruding portion, it is described go out
Vapour side inner casing section has the groove for housing the protruding portion, and the sealing element is located in the lateral surface and groove of the protruding portion
Between inner wall.
Preferably, the protruding portion is equipped with the locating piece for positioning the sealing element.
Preferably, the sealing means of the sealing element are by the steam admission side inner casing section and the intersegmental edge of steam output side inner casing
The axial direction of the rotor is sealed.
Preferably, axially extending groove is equipped in the steam admission side inner casing section and the steam output side inner casing section, it is described
The side of sealing element is plugged in the groove of steam admission side inner casing section, and opposite side is plugged in the groove of steam output side inner casing section.
Preferably, the steam admission side inner casing section and the steam output side inner casing section are made of different materials.
As described above, the cylinder of the steam turbine of the present invention, has the advantages that：Inner casing is segmentation structure, into
Vapour side inner casing section and steam output side inner casing section is are tightly connected, and it is whole close that the round sealing element that annular is closed is used to carry out inner casing
Envelope, the seal form form good self sealss using inside and outside pressure difference；Thin-wall construction sealing element can be born very big simultaneously
The temperature difference, and can be between the inner casing of effective coordination both sides deformation, reduce thermal stress；Since the non-two halves of sealing element are spliced, because
Split gas leakage is not present in this, so the good seal performance of the present invention, is conducive to improve steam end efficiency, reduces cylinder and is manufactured into
This.
Description of the drawings
Fig. 1 is shown as segmented inner casing structure diagram of the prior art.
Fig. 2 is shown as the first embodiment figure of the cylinder of the steam turbine of the present invention.
Fig. 3 is shown as the second embodiment figure of the cylinder of the steam turbine of the present invention.
Fig. 4 is shown as the 3rd embodiment figure of the cylinder of the steam turbine of the present invention.
Fig. 5 is shown as the fourth embodiment figure of the cylinder of the steam turbine of the present invention.
Component label instructions
1 rotor
2 outer shells
31 steam admission side inner casing sections
32 steam output side inner casing sections
4 sealing elements
5 locating pieces
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
It please refers to Fig.1 to Fig. 5.It should be clear that structure, ratio, size depicted in this specification institute attached drawing etc., only to
Coordinate the revealed content of specification, so that those skilled in the art understands and reads, being not limited to the present invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed skill
In the range of art content can cover.Meanwhile in this specification it is cited as " on ", " under ", "left", "right", " centre " and
The term of " one " etc. is merely convenient to understanding rather than to limit the enforceable range of the present invention for narration, relativeness
It is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
As shown in Figures 2 to 5, the present invention provides a kind of cylinder of steam turbine, including outer shell 2 and is placed in outer shell 2
Inner casing, the rotor 1 of steam turbine are threaded through in inner casing, and the outer shell 2 and inner casing are filled the span of a man's arms by two semicircle circumferential portions and be spliced,
Two semicircle circumferential portions of the inner casing are divided into steam admission side inner casing section 31 and steam output side inner casing section 32, steam admission side inner casing in an axial direction
Section 31 is connected, and the round part that sealing element 4 is closed for annular with steam output side inner casing section 32 by the sealing of sealing element 4, by inner casing
Two semicircle circumferential portion integral sealings.The present invention uses the round sealing element that annular is closed by steam admission side inner casing section 31 and steam output side
The sealing of inner casing section 32 is connected, and good self sealss are formed using the pressure difference in inner casing；The sealing structure can bear very big simultaneously
The temperature difference；Since the non-two halves of sealing element are spliced, i.e., sealing element is whole coil structures, therefore there is no split gas leakage, so
The good seal performance of the present invention is conducive to improve steam end efficiency, reduces cylinder manufacture cost.
Several setting forms of above-mentioned sealing element are detailed below.
As shown in Figures 2 and 3, the sealing means of above-mentioned sealing element 4 are by steam admission side inner casing section 31 and steam output side inner casing section
It is sealed between 32 along the radial direction of rotor 1.Fig. 2 show the concrete structure diagram of double-current shape cylinder, the inner casing point of double-current shape cylinder
Be three sections, interlude is steam admission side inner casing section 31, both sides section for steam output side inner casing section 32, sealing element 4 radially set realize into
The radial seal of vapour side inner casing section 31 and steam output side inner casing section 32.Fig. 3 is shown as the concrete structure diagram of one-manifold cylinder, one-manifold
The inner casing of cylinder is divided into two sections, and one section is steam admission side inner casing section 31, and another section is steam output side inner casing section 32.
Preferably to install fixed above-mentioned sealing element, the enlarged fragmentary portion in Fig. 2 and Fig. 3, above-mentioned steam admission side inner casing are seen
The side that section 31 is connected with the steam output side inner casing section 32 has protruding portion, and steam output side inner casing section 32 has the recessed of accommodating protruding portion
Slot, sealing element 4 are located between the lateral surface of protruding portion and the inner wall of groove.In the present embodiment, above-mentioned protruding portion is equipped with will be close
The locating piece 5 that sealing 4 positions, which can be connected through a screw thread or the connection modes such as positioning bolt are fixed on protruding portion
On, as long as the fixation to sealing element can be realized.Present embodiment enhances the polarizations of sealing element, and leakproofness is improved with this.
For ease of setting, above-mentioned sealing element 4 can be located in vertical state between the inner wall of protruding portion and groove.
Use the assembling mode of the inner casing of radial seal for：Steam admission side inner casing section 31 is (including upper semicircumference part, lower half circle
Circumferential portion) and rotor 1 be integral and lifted, be fixed temporarily between them, sealing element 4 be inserted in steam admission side inner casing section 31
Upper semicircumference part and lower half circumferential section in, and sealing element 4 is fixed using locating piece 5, steam admission side inner casing section-turn
Son-sealing element-locating piece forms single piece；Then the lower half circumferential section of steam output side inner casing section is installed successively, described is whole
Installation is completed in body part, the upper semicircumference part of steam output side inner casing section.
As shown in Figures 4 and 5, the sealing means of above-mentioned sealing element 4 is will be in steam admission side inner casing section 31 and the steam output sides
It is sealed between cylinder section 32 along the axial direction of the rotor 1.Fig. 4 show the concrete structure diagram of double-current shape cylinder；Fig. 5 is shown as single
The concrete structure diagram of manifold cylinder.Axial seal in the present embodiment is laterally set sealing element 4, sees the office in Fig. 4 and Fig. 5
Portion amplifier section.
It is positioned for ease of the installation of above-mentioned sealing element, sees the enlarged fragmentary portion in Fig. 4 and Fig. 5, above-mentioned steam admission side inner casing
Axially extending groove is equipped in section 31 and the steam output side inner casing section 32, the side of sealing element 4 is plugged in steam admission side inner casing
In the groove of section 31, opposite side is plugged in the groove of steam output side inner casing section 32.The setting of groove is determined convenient for the installation of sealing element
Position, and improve leakproofness.
Use the assembling mode of the inner casing of radial seal for：First install rotor 1, steam admission side inner casing section 31 upper semi-circle circumference
Point and lower half circumferential section, then the sealing element 4 of whole circle is installed, sealing element 4 is embedded in the groove of steam admission side inner casing section；Rotor
1 and steam admission side inner casing section 31 be integral and lifted, be fixed temporarily between them, form single piece；It installs out successively again
The lower half circumferential section of vapour side inner casing section 32, the single piece, steam output side inner casing section upper semicircumference part；Then it moves close
Sealing by the groove of the side embedment steam output side inner casing section of sealing element, makes it take both sides inner casing simultaneously, it is ensured that leakproofness,
Complete the installation of inner casing.
Preferably to reduce production cost, steam admission side inner casing section 31 and the steam output side inner casing section 32 in the present invention use
Different materials are made.Steam admission side inner casing section 31 uses preferable material, such as 600-625 DEG C of grade or 700-760 DEG C etc.
The material of grade；The material of lower grade can be used in steam output side inner casing section.Above-mentioned sealing element 4 is the thin-wall member of round.
In conclusion the cylinder of steam turbine of the present invention, inner casing is segmentation structure, steam admission side inner casing section and steam output side
Inner casing section carries out inner casing integral sealing to be tightly connected, and using the round sealing element that annular is closed, which utilizes
Inside and outside pressure difference forms good self sealss；Round sealing element can bear the very big temperature difference, and being capable of effective coordination two simultaneously
Deformation between the inner casing of side reduces thermal stress；Since the non-two halves of sealing element are spliced, there is no split gas leakage, institutes
With the good seal performance of the present invention, be conducive to improve steam end efficiency, reduce cylinder manufacture cost.So the present invention effectively overcomes
Various shortcoming of the prior art and have high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (7)
1. a kind of cylinder of steam turbine, including outer shell (2) and the inner casing being placed in outer shell (2), the rotor (1) of steam turbine is worn
In inner casing, the outer shell (2) and inner casing are filled the span of a man's arms by two semicircle circumferential portions and are spliced, which is characterized in that the inner casing
Two semicircle circumferential portions be divided into steam admission side inner casing section (31) and steam output side inner casing section (32), steam admission side inner casing section in an axial direction
(31) it is connected, and the round that the sealing element (4) is closed for annular by sealing element (4) sealing with steam output side inner casing section (32)
Part, by two semicircle circumferential portion integral sealings of the inner casing.
2. the cylinder of steam turbine according to claim 1, it is characterised in that：The sealing means of the sealing element (4) are
It will be sealed between the steam admission side inner casing section (31) and the steam output side inner casing section (32) along the radial direction of the rotor (1).
3. the cylinder of steam turbine according to claim 2, it is characterised in that：The steam admission side inner casing section (31) with it is described
The connected side of steam output side inner casing section (32) has protruding portion, and the steam output side inner casing section (32), which has, houses the protruding portion
Groove, the sealing element (4) are located between the lateral surface of the protruding portion and the inner wall of groove.
4. the cylinder of steam turbine according to claim 3, it is characterised in that：The protruding portion is equipped with the sealing
The locating piece (5) of part (4) positioning.
5. the cylinder of steam turbine according to claim 1, it is characterised in that：The sealing means of the sealing element (4) are
It will be sealed between the steam admission side inner casing section (31) and the steam output side inner casing section (32) along the axial direction of the rotor (1).
6. the cylinder of steam turbine according to claim 5, it is characterised in that：The steam admission side inner casing section (31) and described
Axially extending groove is equipped in steam output side inner casing section (32), the side of the sealing element (4) is plugged in steam admission side inner casing section
(31) in groove, opposite side is plugged in the groove of steam output side inner casing section (32).
7. the cylinder of steam turbine according to claim 1, it is characterised in that：The steam admission side inner casing section (31) and described
Steam output side inner casing section (32) is made of different materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611184996.1A CN108204252B (en) | 2016-12-20 | 2016-12-20 | Cylinder for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611184996.1A CN108204252B (en) | 2016-12-20 | 2016-12-20 | Cylinder for steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108204252A true CN108204252A (en) | 2018-06-26 |
| CN108204252B CN108204252B (en) | 2020-04-17 |
Family
ID=62603916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611184996.1A Active CN108204252B (en) | 2016-12-20 | 2016-12-20 | Cylinder for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108204252B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412546A (en) * | 2020-11-23 | 2021-02-26 | 东方电气集团东方汽轮机有限公司 | Nozzle chamber of industrial steam turbine without median plane |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1605717A (en) * | 2003-10-10 | 2005-04-13 | 上海发电设备成套设计研究所 | Super-supercritical air cooling steam turbine |
| CN102383879A (en) * | 2011-10-28 | 2012-03-21 | 上海电气电站设备有限公司 | Steam turbine structure |
| CN204386675U (en) * | 2014-11-26 | 2015-06-10 | 嘉善县汾湖铸钢厂 | A kind of High Pressure Inner Cylinder of Steam Turbine |
| CN105134314A (en) * | 2015-10-19 | 2015-12-09 | 东方电气集团东方汽轮机有限公司 | Turboset high-pressure part structure with cylindrical inner shell |
-
2016
- 2016-12-20 CN CN201611184996.1A patent/CN108204252B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1605717A (en) * | 2003-10-10 | 2005-04-13 | 上海发电设备成套设计研究所 | Super-supercritical air cooling steam turbine |
| CN102383879A (en) * | 2011-10-28 | 2012-03-21 | 上海电气电站设备有限公司 | Steam turbine structure |
| CN204386675U (en) * | 2014-11-26 | 2015-06-10 | 嘉善县汾湖铸钢厂 | A kind of High Pressure Inner Cylinder of Steam Turbine |
| CN105134314A (en) * | 2015-10-19 | 2015-12-09 | 东方电气集团东方汽轮机有限公司 | Turboset high-pressure part structure with cylindrical inner shell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412546A (en) * | 2020-11-23 | 2021-02-26 | 东方电气集团东方汽轮机有限公司 | Nozzle chamber of industrial steam turbine without median plane |
| CN112412546B (en) * | 2020-11-23 | 2022-01-11 | 东方电气集团东方汽轮机有限公司 | Nozzle chamber of industrial steam turbine without median plane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108204252B (en) | 2020-04-17 |
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