CN209494598U - A kind of steam turbine with filling structure - Google Patents
A kind of steam turbine with filling structure Download PDFInfo
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- CN209494598U CN209494598U CN201821818759.0U CN201821818759U CN209494598U CN 209494598 U CN209494598 U CN 209494598U CN 201821818759 U CN201821818759 U CN 201821818759U CN 209494598 U CN209494598 U CN 209494598U
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- inner casing
- steam
- filling
- steam turbine
- blade unit
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- 239000011229 interlayer Substances 0.000 claims abstract description 26
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 238000001816 cooling Methods 0.000 description 17
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a kind of steam turbines with filling structure, the steam turbine includes outer shell and inner casing, one inside for thering is the rotor of thrust balancing piston to be mounted in inner casing with rotationally supporting, the flow channel of steam is formed between inner casing and rotor, multiple working-blades of rotor and multiple guide vanes of inner casing are alternately arranged, multistage blade unit is formed；Steam is from through-flow after the wherein first specified blade unit, the thrust balancing piston chamber that is sent between inner casing and thrust balancing piston；The interlayer for steam circulation is formed between inner casing and outer shell, the interlayer includes the steam that filling chamber can receive a sealed chamber between rotor and inner casing, it is mixed with outside by the filling that multichannel gas filling pipeline is sent into the filling chamber, eliminate the flow and pressure difference when multichannel filling input, again via the through-flow place returned to the communicating pipe of inner casing in flow channel after being located at the second specified blade unit, effectively solve the problems, such as that filling valve opens vibration.
Description
Technical field
The utility model relates to a kind of steam turbines with filling structure.
Background technique
Steam turbine is a kind of rotary steam power device, is generally included with rotor that is vaned, rotatably supporting,
It is internal that the rotor is arranged in shell set.By heating and steam stream under the pressure cover and to be formed via the shell
When the flowing space, the rotor is placed among rotation by the steam by blade.
For efficiency reasons, the operating parameter (pressure and temperature of such as steam) of steam turbine is higher and higher, by intensity and
Material limitation needs to carry out each component of steam turbine to make steam turbine still be able to reliability service at particularly high temperatures
It is cooling.Because the high-temperature capability of these components is all limited.If effective cooling cannot be obtained when temperature improves, need
It is manufactured with very expensive material (such as nickel-base alloy).
By it is hitherto known particularly in form for steam turbine or rotor steamer mechanism member cooling means, can
It is divided into active cooling and passive cooling.By active cooling, cooling passes through one kind independently of steamer mechanism member, that is, in addition to working medium
The mode of additional input coolant is realized.Conversely, passive cooling only by appropriately guiding or working medium being utilized to carry out.Steam turbine so far
It is preferable to use passive cooling for component.
Patent CN 200580033477.9 discloses a kind of steam turbine, as shown in Figure 1, including in an outer shell 2 and one
Cylinder 3, the outer shell 2 and inner casing 3 are formed with a live steam input channel 10, and one has a thrust balancing piston 4 and including more
The rotor 5 of a working-blade 7 is mounted in the inside of inner casing 3 with rotationally supporting, and multiple guiding are arranged in such a way on inner casing 3
Blade 8, streamwise 11 constitute the flow channel 9 that one includes the steam of multiple leaf-levels；Steam is after a leaf-level
It is flowed into the chamber 15 between inner casing 3 and outer shell 2 by a feedback channel 14 in the inner casing 3, from there over one
It is flat that a input channel 16 in inner casing 3 flows into the thrust that one is located between thrust balancing piston 4 and inner casing 3 along axial 17
It weighs in piston chamber 12；Reach thrust-balancing by the steam in thrust balancing piston chamber 12.
Symbolically indicate that live steam inputs with arrow 13；The initial steam overwhelming majority of live steam input channel 10 is flowed into along flowing
Direction flows into flow channel 9, and lesser part enters one in the seal chamber 18 between rotor 5 and inner casing 3 as leakage steam flow.?
Here, leakage vapour substantially 19 flowing in reverse direction.Steam in seal chamber 18, the cross feedback being arranged by inner casing 3 are logical
Road 20 flows into the inflow chamber 26 that one is located at after a leaf-level, and label 21,22 indicates turning twice for cross feedback channel 20
To；Meanwhile the load introducing pipe 23 that filling passes through outer shell 2 and inner casing 3 by one flows into the inflow chamber 26.The feedback
Channel 14 is connect after a feedback leaf-level 24 with the flow channel 9, and the cross feedback channel 20 intersects anti-at one
It is connect after feedback leaf-level 25 with the flow channel 9, the cross feedback leaf-level 25 is set along the flow direction of flow channel 9 11
After the feedback leaf-level 24.
Steam turbine with above-mentioned cooling structure in practical applications, as shown in Fig. 2, gas filling pipeline 24 ' and cross feedback
Channel 20 ' is connected in inner casing 3 ' by a steam supplementing cavity 27 ', while passing through pipeline 23 ' to through-flow interior input filling and cooling
Vapour.Such structure often generates very big vibration problem in actual operation.As shown in figure 3, steam turbine filling passes through filling
Pipeline 24 ' divides two-way to be directly entered 3 ' filling of inner casing through intubation by steam turbine two sides；Due to inner casing split structure, two-way is mended
Vapour respectively enters two independent steam supplementing cavities 27 ' of inner casing 3 '.Due to filling valve spherical cavity structure and two sides circuit design not
Together, two bursts of fillings are there are flow and pressure difference, and when filling can be in the pipeline 23 ' of two sides and through-flow middle generations excitation and filling flow
Uneven situation, so as to cause Steam Turbine Vibration problem.
Patent CN201480046503.0 discloses the reason of vibration problem, and provides a solution.The patent
Provide a kind of scheme for installing regulating valve and vibration detection probe additional respectively in two sides filling pipeline.As shown in figure 5, steam turbine 32
Two steam suppling tube roads 35,36 in the first valve 33 and the second valve 34 is respectively set, when the first valve 33 and/or the second valve 34 go out
When now vibrating, adjust the first valve 33 towards the direction of closing, the second valve 34 is adjusted towards open direction.
Utility model content
The purpose of this utility model is to provide a kind of steam turbines with filling structure, cooling by cylinder interior in optimizing
Pipeline and filling structure, the vibration problem after being opened in a novel manner come filling valve when solving steam turbine operation.
In order to achieve the above object, a technical solution of the utility model is to provide a kind of steamer with filling structure
Machine, includes outer shell and inner casing, and the inside for having the rotor of thrust balancing piston to be mounted in the inner casing with rotationally supporting is described interior
The flow channel of steam is formed between cylinder and rotor, wherein be alternately arranged rotor multiple working-blades and inner casing it is multiple
Guide vane forms multistage blade unit, and the interlayer for steam circulation is formed between the inner casing and outer shell；The inner casing and
Interlayer between outer shell includes filling chamber, is connected with the multichannel gas filling pipeline of conveying filling to steam turbine；The filling
The communicating pipe circulated for steam is equipped between chamber and the flow channel.
Optionally, the filling chamber is cyclic annular steam supplementing cavity.
Optionally, bigger to the accommodation space of steam closer to the position of communicating pipe in the filling chamber.
Optionally, the multistage blade unit includes the first setting blade unit and the second setting blade unit；Described turn
Sealed chamber is equipped between son and inner casing；
The steam turbine is equipped with the first steam channel in interior cylinder interior, will be through-flow after the first setting blade unit, with
The thrust balancing piston chamber being formed between the thrust balancing piston and inner casing；
The steam turbine is additionally provided with the second steam channel, includes: will be between the sealed chamber and the inner casing and outer shell
The pipeline of interlayer connection, the interlayer and its filling chamber, and interlayer is set with second to the through-flow company after blade unit
The logical communicating pipe.
Optionally, downstream of the second setting blade unit in the first setting blade unit in flow channel.
Optionally, the first setting blade unit corresponds to the quaterfoil grade in flow channel, the second setting leaf
Piece unit corresponds to the 5th leaf-level in flow channel.
Optionally, if communicating pipe described in main line is distributed in inner casing circumference.
Optionally, first steam channel is first axially extending basically perpendicular to rotor in inner casing, turns to for the first time
After be basically parallel to it is axially extending, second turn to after it is basic again perpendicular to axially extending；
In second steam channel, pipeline base that interlayer between the sealed chamber and the inner casing and outer shell is connected to
This extends perpendicular to the axis of rotor, and interlayer and the through-flow communicating pipe being connected to after the second setting blade unit is substantially vertical
Extend in axis.
Optionally, gas filling pipeline described in multichannel extends through outer shell, with the filling chamber.
Compared with prior art, the steam turbine described in the utility model with filling structure, has the advantage that
The utility model keeps the steam flow in cooling structure reversed: the design in existing cooling structure is from previous stage leaf
Piece is through-flow to flow into dummy piston through interior outer shell interlayer by pipeline, then returns to rear stage from inner casing internal duct through dummy piston
Blade is through-flow；The utility model is to flow into dummy piston by pipeline in inner casing from previous stage blade is through-flow, and then circuit is passed through
It is through-flow that interior outer shell interlayer reaches latter grade blade.
The utility model eliminates the filling chamber and filling valve pipeline inlet sleeve being originally arranged in inner casing, is changed to
Suitable filling chamber is arranged in the interlayer of interior outer shell (such as cyclic annular steam supplementing cavity).Existing filling structure makes filling be divided to two from filling valve
Road inflow cylinder is through-flow, and due to inner casing split structure, two-way filling respectively enters two independent steam supplementing cavities of inner casing, this two
There are flows and pressure difference for stock filling, cause vibration problem.And the utility model enables filling to mix between interior outer shell,
Flow and pressure difference are eliminated, solves the vibration problem when unlatching of filling valve.
Compared to existing filling valve pipeline transformation scheme, the utility model does not need high temperature adjustable valve and vibration detection is visited
Head, cost are lower；The utility model does not need to design special adjusting logic and method yet, implements simple.Existing high temperature tune
Save valve the problems such as there are bite failures, new departure more secure and reliable provided by the utility model.
Detailed description of the invention
Fig. 1 is the partial cutaway view of existing steam turbine；
Filling structure corresponding partial cutaway view when Fig. 2 is existing steam turbine practical application；
Fig. 3 is the radial cross section of inner casing in filling structure shown in Fig. 2；
Fig. 4 is the implementation diagram of filling structure when solving vibration problem in existing steam turbine；
Fig. 5 is the partial cutaway view of steam turbine in the utility model；
Fig. 6 is the radial cross section of through-flow side steam input channel in the utility model.
Specific embodiment
It is vibrated big in order to solve the problems, such as to occur in existing steam turbine structure operational process unit when filling valve is opened, this
Utility model provides a kind of steam turbine with filling structure.
As shown in Figure 5, Figure 6, steam turbine is equipped with outer shell 110 and inner casing 120, and one has the rotor of thrust balancing piston 140
(130) it is mounted in the inside of inner casing 120 with rotationally supporting.Medium (such as steam) is formed between the inner casing 120 and rotor (130)
Flow channel, substantially along rotor (130) axial direction arrangement.The flow channel is alternately arranged rotor (130)
The guide vane 160 of working-blade 150 and inner casing 120 forms multistage blade unit.Live steam passes through inner casing 120 and outer shell
The 110 live steam input channels (not shown go out) having are sent into vapour chamber 350, are thus entered flow channel and are streamed in downstream
Blade units at different levels discharge thermal energy with the expansion and cooling of live steam to drive rotor (130) to rotate.
The utility model allows steam when flowing through flow channel, from through-flow 330 by one first steam channel of setting
Place enters the thrust balancing piston chamber 340 between thrust balancing piston 140 and inner casing 120, to generate a reaction
In the opposite forces of rotor thrust, reach thrust-balancing, and realizes the cooling of thrust balancing piston 140.
The utility model also passes through one second steam channel of setting, makes steam (the sub-fraction leakage such as from live steam
Vapour) can be from rotor (130) and inner casing 120(packing) between a sealed chamber 310, enter inner casing 120 and outer shell 110 it
Between a filling chamber 220, mixed with outside by the filling that gas filling pipeline is sent to the filling chamber 220, in the filling
Flow and pressure difference when filling enters steam turbine from two-way gas filling pipeline is balanced in chamber 220 to pass through after eliminating vibrational excitation
Be distributed in 120 circumference of inner casing communicating pipe 230 introduce through-flow 330 after leaf-level group continue to do work, solve filling valve open
The problem of vibration.
The filling chamber 220 is arranged on the outside of inner casing 120, can be the space structure of arbitrary shape, by outer shell 110
It is defined with each comfortable shape of block at this of inner casing 120.Preferred filling chamber 220 is cyclic annular steam supplementing cavity.In this example, for steaming
A part of region in the logical interior outer shell interlayer of steam flow, is formed as the filling chamber 220.Arrow 210 is used in Fig. 5, it is symbolic
Ground indicates that wherein the sandwiched area where gas filling pipeline access filling chamber 220 is all the way to be sent into filling.
Exemplary filling chamber 220 is located at the back segment of interlayer, the i.e. side closer to communicating pipe 230, and closer to this
The volume of side filling chamber 220 is bigger.It is shown as in Fig. 5 closer to communicating pipe 230, the ring width in 220 section of filling chamber is bigger.
For example, by the structure design for changing 120 outside of inner casing, so that corresponding to the internal diameter at the inner casing position of 220 position of filling chamber
It is gradually reduced and realizes.
Wherein, the shape/size design of such as filling chamber, present position of the filling chamber in interior outer shell interlayer is mended
Steam pipe road can apply feelings according to the utility model steam turbine is actual to the on-position of filling chamber/filling flow etc.
Condition is adjusted, and the description in above-mentioned example is without limitation.
Illustratively, first steam channel is equipped with corresponding pipeline in inner casing 120, keeps steam through-flow in correspondence
It sets out after a 330 blade unit (the referred to as first specified blade unit), is first substantially perpendicular to and axially extends (with arrow
411 schematically illustrate), axially extension (schematically illustrating with arrow 412) is arranged essentially parallel to after first time turns to, then the
Substantially again perpendicular to axially (schematically illustrating with arrow 413) is extended after secondary steering, until entering thrust balancing piston chamber
Room 340.
Illustratively, second steam channel, the pipeline comprising communication seals chamber 310 Yu interior outer shell interlayer, interior outer shell
Interlayer and the filling chamber 220 wherein formed, and it is connected to the pipeline (containing communicating pipe 230) of interior outer shell interlayer and flow channel.
Steam is showed schematically from sealed chamber 310s with arrow 511, is substantially perpendicular to and is axially extended and enter inside and outside cylinder folder
Layer；Show schematically that leading portion of the steam along axial direction in interior outer shell interlayer extends with arrow 512, by the filling chamber 220 of back segment
When in addition input filling therein (arrow 210 schematically illustrates) and mix, and continue to extend up into communicating pipe 230；With arrow
First 513 show schematically that steam, substantially again perpendicular to axially extending, until reaching flow channel, is accessed along communicating pipe 230
Through-flow 320 after another blade unit (the referred to as second specified blade unit).
The second specified blade unit in this example is located at the downstream of the first specified blade unit, is the first specified blade unit
A leaf-level later.In preferred example, the first specified blade unit corresponds to the quaterfoil grade of flow channel, institute
State the 5th leaf-level that the second specified blade unit corresponds to flow channel.
However, the utility model is not intended to limit the adjustment for carrying out structure according to the practical situations of steam turbine, such as change
Become shape/size/steering/flow etc. of the respective pipeline of the first, second steam channel, changes the first, second specified blade unit
Corresponding leaf-level, adjusts the blade number of stages that is spaced between the first, second specified blade unit, or by the first steam
The input port (at corresponding through-flow 330) in channel is adjusted to the downstream of the delivery outlet (at corresponding through-flow 320) of the second steam channel, etc.
Deng.
In conclusion the steam turbine described in the utility model with filling structure, changes the steam stream in cooling structure
To being provided with suitable cyclic annular steam supplementing cavity also between interior outer shell, mix filling between interior outer shell, eliminate input two
Flow and pressure difference when the filling of road, the vibration problem after filling valve is opened when efficiently solving steam turbine operation.
It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on
The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended
Claim limit.
Claims (8)
1. a kind of steam turbine with filling structure includes outer shell (110) and inner casing (120), one has thrust balancing piston
(140) rotor (130) is mounted in the inside of the inner casing (120) with rotationally supporting, the inner casing (120) and rotor (130) it
Between be formed with the flow channel of steam, wherein being alternately arranged the multiple working-blades (150) and inner casing (120) of rotor (130)
Multiple guide vanes (160) formed multistage blade unit, be formed between the inner casing (120) and outer shell (110) for steam
The interlayer of circulation, it is characterised in that:
Interlayer between the inner casing (120) and outer shell (110) includes filling chamber (220), with conveying filling to steam turbine
Multichannel gas filling pipeline be connected；The connection circulated for steam is equipped between the filling chamber (220) and the flow channel
It manages (230).
2. as described in claim 1 with the steam turbine of filling structure, which is characterized in that
The filling chamber (220) is cyclic annular steam supplementing cavity.
3. as claimed in claim 1 or 2 with the steam turbine of filling structure, which is characterized in that
The multistage blade unit includes the first setting blade unit and the second setting blade unit；The rotor (130) and interior
Sealed chamber (310) are equipped between cylinder (120)；
The steam turbine is equipped with the first steam channel inside inner casing (120), will be through-flow after the first setting blade unit, with
A thrust balancing piston chamber (340) connection being formed between the thrust balancing piston (140) and inner casing (120)；
The steam turbine is additionally provided with the second steam channel, includes: will be the sealed chamber (310) and the inner casing (120) and outer
The pipeline that interlayer is connected between cylinder (110), the interlayer and its filling chamber (220), and interlayer and second are set into blade
The communicating pipe (230) of through-flow connection after unit.
4. as claimed in claim 3 with the steam turbine of filling structure, which is characterized in that
Downstream of the second setting blade unit in the first setting blade unit in flow channel.
5. as claimed in claim 3 with the steam turbine of filling structure, which is characterized in that
The first setting blade unit corresponds to the quaterfoil grade in flow channel, the corresponding stream of the second setting blade unit
The 5th leaf-level in dynamic channel.
6. as claimed in claim 3 with the steam turbine of filling structure, which is characterized in that
If being distributed in inner casing (120) circumference communicating pipe described in main line (230).
7. as claimed in claim 3 with the steam turbine of filling structure, which is characterized in that
First steam channel is first axially extending basically perpendicular to rotor in inner casing (120), basic after turning to for the first time
Be parallel to it is axially extending, second turn to after it is basic again perpendicular to axially extending；
In second steam channel, by interlayer between the sealed chamber (310) and the inner casing (120) and outer shell (110)
The pipeline of connection extends basically perpendicular to the axis of rotor, by interlayer and the through-flow company being connected to after the second setting blade unit
Siphunculus (230) extends basically perpendicular to axis.
8. as claimed in claim 3 with the steam turbine of filling structure, which is characterized in that
Gas filling pipeline described in multichannel extends through outer shell (110), is connected to the filling chamber (220).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821818759.0U CN209494598U (en) | 2018-11-06 | 2018-11-06 | A kind of steam turbine with filling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821818759.0U CN209494598U (en) | 2018-11-06 | 2018-11-06 | A kind of steam turbine with filling structure |
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| Publication Number | Publication Date |
|---|---|
| CN209494598U true CN209494598U (en) | 2019-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821818759.0U Withdrawn - After Issue CN209494598U (en) | 2018-11-06 | 2018-11-06 | A kind of steam turbine with filling structure |
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| CN (1) | CN209494598U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184823A (en) * | 2018-11-06 | 2019-01-11 | 上海电气电站设备有限公司 | A kind of steam turbine and its operation method with filling structure |
-
2018
- 2018-11-06 CN CN201821818759.0U patent/CN209494598U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184823A (en) * | 2018-11-06 | 2019-01-11 | 上海电气电站设备有限公司 | A kind of steam turbine and its operation method with filling structure |
| CN109184823B (en) * | 2018-11-06 | 2024-03-19 | 上海电气电站设备有限公司 | Steam turbine with steam supplementing structure and operation method thereof |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191015 Effective date of abandoning: 20240319 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191015 Effective date of abandoning: 20240319 |