CN108204253A - The cylinder of steam turbine - Google Patents
The cylinder of steam turbine Download PDFInfo
- Publication number
- CN108204253A CN108204253A CN201611185407.1A CN201611185407A CN108204253A CN 108204253 A CN108204253 A CN 108204253A CN 201611185407 A CN201611185407 A CN 201611185407A CN 108204253 A CN108204253 A CN 108204253A
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- cylinder
- rotor
- steam turbine
- blade
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention provides a kind of cylinder of steam turbine, it includes rotor, blade and cylinder body, rotor is threaded through in cylinder body, one end of cylinder body and rotor seal, there is the space of accommodating blade between the other end and rotor of cylinder body, blade include stator blade and with the mutually fixed movable vane piece of rotor, movable vane piece and stator blade are arranged alternately, the cylinder body is circumferential formula overall structure, have that main steam enters between cylinder body and rotor into vapour chamber, blade is placed in the rear into vapour chamber, stator blade is fixed in held in ring, held in ring is spliced by two semicircle chow rings, held in ring is pushed against on the inner wall of cylinder body.The cylinder of the steam turbine of the present invention, cylinder body can bear very high pressure difference and temperature using the whole coil structures of circumferential formula.
Description
Technical field
The present invention relates to apparatus of steam power plants technical field, more particularly to a kind of cylinder of steam turbine.
Background technology
According to " thermal power plant Hardware Description Manual-volume Two-steam turbine, China Machine Press, 1998 ".Traditional steamer
The inner casing of machine cylinder (containing 2 grades and above stator blade) is not whole ring type, is half structure (or left and right half or up and down up and down
Left and right 4 half, the same below).Inner casing is to be packed into rotor and blade for the purpose of upper and lower half structure.The connection side of upper and lower half structure
Formula is bolted to be connected with shrink ring.By the upper lower half cylinder structure being bolted or shrink ring fastens, on the one hand, its spiral shell
Bolt or shrink ring needs bear very big stress, under high temperature, high pressure differential environment will creep relaxation, be easy to cause split
Vapour is leaked, therefore applicable steam parameter cannot be too high.On the other hand, due to the discontinuous structure that split is disconnection, and greatly
Mostly there are flange arrangement, therefore start in stopping process, thermal stress is uneven, influences start-stop performance.
Due to the high parameter demand of steam turbine in recent years, steam inlet condition reached 25MPa~38MPa (such as
35MPa/700 DEG C into vapour), some outer shells are whole ring type structure, but it is still half structure up and down that it, which fixes the inner casing of blade,
But under high parameter, inner casing is also required to bear very high pressure difference (such as more than 15MPa).At this time, upper lower cylinder half intensity is asked
The problem of topic or start-stop performance are poor.
Therefore, it is necessary to a kind of cylinders for being adapted to elevated steam conditions and the good steam turbine of start-stop performance.
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 solving the problems, such as that strength problem and start-stop performance of the steam turbine under elevated steam conditions are poor in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of cylinder of steam turbine, including rotor, leaf
Piece and cylinder body, rotor are threaded through in cylinder body, one end of cylinder body and rotor seal, have accommodating leaf between the other end and rotor of cylinder body
The space of piece, blade include stator blade and with the mutually fixed movable vane piece of rotor, movable vane piece and stator blade be arranged alternately, the cylinder body
For circumferential formula overall structure, with main steam entrance into vapour chamber between cylinder body and rotor, blade is placed in the rear into vapour chamber,
Stator blade is fixed in held in ring, and held in ring is spliced by two semicircle chow rings or more than two arc sections, and held in ring is pushed against cylinder
On the inner wall of body.
Preferably, the held in ring is fixedly linked with the cylinder body by fixing piece.
Preferably, the outside of the cylinder body is also arranged with outer cylinder body, outer cylinder body for circumferentially closed integral structure or
Outer cylinder body is spliced by two semi-circumference cylinder bodies.
Preferably, the rear of the cylinder body also has the extension cylinder body as exhaust casing, extends solid on the inner wall of cylinder body
Surely there is stator blade, extend cylinder body and be spliced by two semi-circumference cylinder bodies.
Preferably, the cylinder body is connected with extending cylinder body by connector.
Preferably, steam flow is unidirectional in the cylinder body, and steam passes through the space of blade again by entering into vapour chamber
Outflow.
Preferably, the cylinder body is made of nickel-base high-temperature material.
Preferably, there is circumferentially prominent dummy piston portion on the rotor, dummy piston with it is described adjacent into vapour chamber.
Preferably, there is circumferentially prominent dummy piston portion, dummy piston is located remotely from described into vapour chamber on the rotor
The exhaust region of room.
Preferably, the face that both the cylinder body and the held in ring are in contact is the conical surface, and is inclined along the axial direction of the rotor
Tiltedly, the conical surface is smaller closer to described its diameter into vapour chamber.
As described above, the cylinder of the steam turbine of the present invention, has the advantages that：Cylinder body uses circumferentially closed one
Body formula structure can bear very high pressure difference and temperature, adapt to high parameter, such as steam inlet condition reaches 25MPa~38MPa；Week
It is the structure of whole ring type to closing, no split leaks vapour, does not need to the connectors such as split bolt or shrink ring, therefore, this
Its start-stop performance of the cylinder of invention is good.
Description of the drawings
Fig. 1 is shown as the first embodiment schematic diagram of the cylinder of the steam turbine of the present invention.
Fig. 2 is shown as the second embodiment schematic diagram of the cylinder of the steam turbine of the present invention.
Fig. 3 is shown as the 3rd embodiment schematic diagram of the cylinder of the steam turbine of the present invention.
Component label instructions
1 rotor
1a dummy pistons
2 cylinder bodies
3 stator blades
4 movable vane pieces
5 held in ring
6 outer cylinder bodies
7 fixing pieces
8 connectors
9 into vapour chamber
2a extends cylinder body
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.3.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 Figure 1, Figure 2 and Figure 3, the present invention provides a kind of cylinder of steam turbine, including rotor 1, blade and cylinder body
2, rotor 1 is threaded through in cylinder body 2, and one end and the rotor 1 of cylinder body 2 seal, and has accommodating blade between the other end and rotor of cylinder body 2
Space, blade include stator blade 3 and with 1 mutually fixed movable vane piece 4 of rotor, movable vane piece 4 and stator blade 3 be arranged alternately, cylinder body 2
For circumferential formula overall structure namely circumferentially closed integral structure, also referred to as whole coil structures, there is main steaming between cylinder body 2 and rotor 1
Vapour enter into vapour chamber 9, blade is placed in the rear into vapour chamber, and stator blade 3 is fixed in held in ring 5, and held in ring 5 is by two semicircles
Chow ring is spliced, and held in ring 5 is pushed against on the inner wall of cylinder body 2.The present invention uses circumferentially closed whole ring type cylinder body, can bear
Very high pressure difference and temperature adapt to high parameter, such as steam inlet condition reaches 25MPa~38MPa；The knot of circumferentially closed i.e. whole ring type
Structure, no split leak vapour, do not need to the connectors such as split bolt or shrink ring, therefore, its start and stop of cylinder of the invention
It can be good；In addition, in order to realize the installation of stator blade and whole ring type cylinder body, stator blade is fixed in held in ring, and held in ring is by two
Semicircle chow ring or more than two arc sections are spliced, and can first be positioned the held in ring of upper half band stator blade in assembling, so
The held in ring of lower half band stator blade is positioned again afterwards, is finally set with the cylinder body of whole circle, the presence of held in ring is convenient for entire cylinder
Installation improves installation effectiveness and precision.
To improve stability, above-mentioned held in ring 5 is fixedly linked with cylinder body 2 by fixing piece 7.The effect one of fixing piece 7 be for
Stationary housing and held in ring, second is that in order to when rotor rotates, prevent held in ring from being rotated with rotor, play the role of anti-rotation, ensure
Stator blade is stationary.Held in ring 5 in the present invention is pushed against on inboard wall of cylinder block, i.e. distance between cylinder body and rotor and stator blade
The sum of height and held in ring thickness match, and it is blind-mate, therefore, two semicircle chow rings of held in ring 5 to make cylinder body and held in ring
It is connected at split without connectors such as bolts, entire cylinder body is made more to adapt to the environment of high parameter, bears very high pressure difference, such as
The pressure difference of 15MPa-35MPa.The face that both cylinder body 2 and the held in ring 5 are in contact is the conical surface, and along the axial direction of the rotor 1
It tilts, the conical surface is smaller closer to described its diameter into vapour chamber 9, and this shape is convenient for suit.
As a preferred embodiment of the present invention, the cylinder of the present embodiment steam turbine has double-deck cylinder body, above-mentioned cylinder body 2
Outside is also arranged with outer cylinder body 6, and as shown in Fig. 1, Fig. 2 and Fig. 3, outer cylinder body 6 is circumferentially closed integral structure or outer shell
Body 6 is spliced by two semi-circumference cylinder bodies.
As another preferred embodiment of the present invention, the rear of cylinder body 2 also has the extension cylinder body 2a as exhaust casing,
It sees figure 1 and figure 2, extends on the inner wall of cylinder body 2a and be fixed with stator blade 4, since steam discharge lateral pressure, temperature are relatively low, prolong
Long cylinder body 2a can be spliced by two semi-circumference cylinder bodies, in this way convenient for assembling.Above-mentioned cylinder body 2 passes through with extension cylinder body 2a to be connect
Part 8 is connected.
The steam flow in cylinder body 2 in the present embodiment is unidirectional, and steam passes through blade again by entering into vapour chamber 9
Space is flowed out, and single environment for flowing cylinder and being adaptive to high parameter can bear very high pressure difference, such as the pressure difference of 15MPa-35MPa.
Preferably to bear High Pressure Difference, above-mentioned cylinder body 2 is made of nickel-base high-temperature material, makes the cylinder of the present embodiment can be used in
Steam inlet condition for 700 DEG C and more than steam turbine on.And above-mentioned outer cylinder body can then be made of other materials, can reduce cost.
There is circumferentially prominent dummy piston portion 1a, dummy piston 1a can be with described into 9 phase of vapour chamber on above-mentioned rotor 1
Neighbour, as shown in Fig. 1 and Fig. 3.Dummy piston 1a works as rotor in the both sides of dummy piston there are pressure differential, to balance entire rotor
Axial thrust.Another embodiment, dummy piston 1a are located remotely from the exhaust region into vapour chamber 9, as shown in Figure 2；Rotor 1
Dummy piston the advantages of being located at exhaust region be：Packing diameter between steam admission side rotor and cylinder body is small, and leakage vapour is few.
In conclusion the cylinder of steam turbine of the present invention, uses circumferentially closed whole ring type cylinder body, can bear very high
Pressure difference and temperature, adapt to high parameter, such as steam inlet condition reaches 25MPa~38MPa；The structure of circumferentially closed i.e. whole ring type,
It leaks vapour without split, does not need to the connectors such as split bolt or shrink ring, therefore, its start-stop performance of cylinder of the invention
It is good.So the present invention effectively overcomes various shortcoming of the prior art and has 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 (10)
1. a kind of cylinder of steam turbine, including rotor (1), blade and cylinder body (2), rotor (1) is threaded through in cylinder body (2), cylinder
One end of body (2) is sealed with rotor (1), has the space of accommodating blade, leaf packet between the other end of cylinder body (2) and rotor (1)
It includes stator blade (3) and is arranged alternately with rotor (1) mutually fixed movable vane piece (4), movable vane piece (4) and stator blade (3), feature exists
Be circumferential formula overall structure in, the cylinder body (2), have between cylinder body (2) and rotor (1) main steam entrance into vapour chamber (9),
Blade is placed in the rear into vapour chamber (9), and stator blade (3) is fixed in held in ring (5), and held in ring (5) is by two semicircle chow rings or two
A above arc section is spliced, and held in ring (5) is pushed against on the inner wall of cylinder body (2).
2. the cylinder of steam turbine according to claim 1, it is characterised in that：The held in ring (5) is logical with the cylinder body (2)
Fixing piece (7) is crossed to be fixedly linked.
3. the cylinder of steam turbine according to claim 1, it is characterised in that：The outside of the cylinder body (2) is also arranged with
Outer cylinder body (6), outer cylinder body (6) spliced for circumferentially closed integral structure or outer cylinder body (6) by two semi-circumference cylinder bodies and
Into.
4. the cylinder of steam turbine according to claim 1, it is characterised in that：The rear of the cylinder body (2), which also has, to be made
For the extension cylinder body (2a) of exhaust casing, extend on the inner wall of cylinder body (2a) and be fixed with stator blade (3), extend cylinder body (2a) by two
A semi-circumference cylinder body is spliced.
5. the cylinder of steam turbine according to claim 4, it is characterised in that：The cylinder body (2) is with extending cylinder body (2a)
It is connected by connector (8).
6. the cylinder of steam turbine according to claim 1, it is characterised in that：The interior steam flow of the cylinder body (2) is single
To steam is flowed out by entering into vapour chamber (9) by the space of blade again.
7. the cylinder of steam turbine according to claim 1, it is characterised in that：The cylinder body (2) is by nickel-base high-temperature material
It is made.
8. the cylinder of steam turbine according to claim 1, it is characterised in that：Have on the rotor (1) circumferential prominent
Dummy piston (1a), dummy piston (1a) with it is described adjacent into vapour chamber (9).
9. the cylinder of steam turbine according to claim 1, it is characterised in that：Have on the rotor (1) circumferential prominent
Dummy piston portion (1a), dummy piston (1a) is located remotely from the exhaust region into vapour chamber (9).
10. the cylinder of steam turbine according to claim 1, it is characterised in that：The cylinder body (2) and the held in ring (5)
The face that the two is in contact is the conical surface, and along the axially inclined of the rotor (1), the conical surface closer to it is described into vapour chamber (9) its
Diameter is smaller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611185407.1A CN108204253B (en) | 2016-12-20 | 2016-12-20 | Cylinder for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611185407.1A CN108204253B (en) | 2016-12-20 | 2016-12-20 | Cylinder for steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108204253A true CN108204253A (en) | 2018-06-26 |
| CN108204253B CN108204253B (en) | 2020-05-26 |
Family
ID=62603446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611185407.1A Active CN108204253B (en) | 2016-12-20 | 2016-12-20 | Cylinder for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108204253B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868889A (en) * | 2018-09-11 | 2018-11-23 | 中国长江动力集团有限公司 | Steam turbine and power generator |
| WO2020093649A1 (en) * | 2018-11-06 | 2020-05-14 | 上海电气电站设备有限公司 | Steam turbine and internal cooling method therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202031656U (en) * | 2011-04-22 | 2011-11-09 | 上海哈能环保节能工程有限公司 | Special turbine for saturated steam |
| CN102383879A (en) * | 2011-10-28 | 2012-03-21 | 上海电气电站设备有限公司 | Steam turbine structure |
| CN203097954U (en) * | 2013-01-30 | 2013-07-31 | 成都措普科技有限公司 | Reaction steam turbine |
-
2016
- 2016-12-20 CN CN201611185407.1A patent/CN108204253B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202031656U (en) * | 2011-04-22 | 2011-11-09 | 上海哈能环保节能工程有限公司 | Special turbine for saturated steam |
| CN102383879A (en) * | 2011-10-28 | 2012-03-21 | 上海电气电站设备有限公司 | Steam turbine structure |
| CN203097954U (en) * | 2013-01-30 | 2013-07-31 | 成都措普科技有限公司 | Reaction steam turbine |
Non-Patent Citations (2)
| Title |
|---|
| LIUSHUL211: "内缸", 《WWW.DOCIN.COM/P-627358538.HTML》 * |
| 陈珍: "超临界600MW等级汽轮机高中压整体内缸研究", 《热力透平》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868889A (en) * | 2018-09-11 | 2018-11-23 | 中国长江动力集团有限公司 | Steam turbine and power generator |
| WO2020093649A1 (en) * | 2018-11-06 | 2020-05-14 | 上海电气电站设备有限公司 | Steam turbine and internal cooling method therefor |
| US11746674B2 (en) | 2018-11-06 | 2023-09-05 | Shanghai Electric Power Generation Equipment Co., Ltd. | Steam turbine and method for internally cooling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108204253B (en) | 2020-05-26 |
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