CN107387170B - It is a kind of to be pressurized rotor disc structure for prewhirling for wheel rim sealing - Google Patents
It is a kind of to be pressurized rotor disc structure for prewhirling for wheel rim sealing Download PDFInfo
- Publication number
- CN107387170B CN107387170B CN201710689970.0A CN201710689970A CN107387170B CN 107387170 B CN107387170 B CN 107387170B CN 201710689970 A CN201710689970 A CN 201710689970A CN 107387170 B CN107387170 B CN 107387170B
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- Prior art keywords
- flow
- wheel rim
- fibonacci
- prewhirling
- spiral yarn
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Classifications
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- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
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- 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
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
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- 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
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
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- 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
- F05D2240/00—Components
- F05D2240/20—Rotors
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- 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
- F05D2240/00—Components
- F05D2240/55—Seals
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
It is pressurized rotor disc structure for prewhirling for wheel rim sealing the invention discloses a kind of, multiple baffles is installed additional in rotor disk disk and forms flow channel, baffle is that Fibonacci is spiral yarn shaped；Multiple spiral yarn shaped baffles of Fibonacci and its flow channel formed form supercharging device of prewhirling.The flow channel of the spiral yarn shaped baffle composition of Fibonacci is gradually expanded from import to outlet, realizes pressurization of slowing down；The flow channel of Fibonacci spiral yarn shaped baffle composition make radially into air-flow of obturaging flowed out with tangential velocity from outlet, air-flow of obturaging close to rotor disk is pressurized and is prewhirled effect, and the flow direction of air-flow is obturaged by wheel rim sealing structure bottom baffle control section, so that the air-flow of obturaging with high pressure and high tangential velocity enters wheel rim sealing structure.Both it can weaken the degree of combustion gas invasion, and reduce turbine disk temperature, and improve turbine disk heat transfer stability, and can reduce to obturage out to flow and be lost with the reciprocation of mainstream, and improve the efficiency of complete machine.
Description
Technical field
The present invention relates to Gas Turbine technical fields, specifically, being related to a kind of increasing of prewhirling for wheel rim sealing
Press rotor disc structure.
Background technique
There are an annular compartments to be known as turbine disk chamber, the combustion of turbine disk chamber between Gas Turbine turntable and stationary parts
Gas invasion refers to: Wesco pump effect caused by turbine disc spins can constantly pump out the intracavitary air of disk, make intracavitary pressure
It reduces, under the action of Wesco pump effect, when pumping out flow greater than cool-air feed flow, can be fired at turbine disk wheel rim
Gas invasion, i.e., it is intracavitary that main combustion gas can enter disk；In interfering for sprue transfer stator, the circumferential pressure wave of main combustion gas is caused
It is dynamic, combustion gas invasion can be also formed at turbine disk wheel rim.Research shows that combustion gas invasion phenomenon leads to turbine disk overheating failure
Key factor invades the generation of phenomenon, destroys disk chamber cooling effect, damage complete machine safe and reliable operation, and cause complete machine simultaneously
Loss of efficiency.The turbine disk and installation mainly are cooled down first by obturaging air-flow from compressor stage introducing low temperature in engineering at present
Wheel rim into structure the measures such as seals and solves.In addition, can be along with obturaging out the presence flowed while combustion gas invasion occurs.
Obturaging out stream is that cold gas by wheel rim enters mainstream channel, and a kind of phenomenon blended with the high-temperature fuel gas of mainstream.
Current research discovery, which is obturaged out, flows to the gentle dynamic performance of blade profile load, secondary flow distribution of the main flow area in wheel rim sealing downstream all
Cause apparent influence, and it is bigger to obturage flow, caused by effect be more obvious.It is to cut to the air-flow processing that prewhirl is obturaged
A kind of weak effective means obturaging air-flow and influencing on mainstream is prewhirled in engineering by passing through before obturaging air-flow and entering disk chamber at present
Device generates the effect of prewhirling.
Turn the quiet further analysis of disk chamber to turbine to find, Wesco pump effect makes intracavitary and rim sealing pressure reduction, such as
Fruit generates pressurization to air-flow is obturaged by the rotation using rotating disc, and the amplitude of pressure reduction will be made to reduce, so as to
To be substantially reduced the degree of combustion gas invasion.Meanwhile by that can reduce and obturage out stream and main to obturaging the air-flow processing that prewhirl
The circumferential speed of stream is poor, and then reduces and obturage out stream and the interactive loss of mainstream.So by increasing to obturaging air-flow
Processing of pressing and prewhirl can not only weaken the degree of combustion gas invasion, but also can reduce the reciprocation loss for obturaging out stream with mainstream.
Therefore, prewhirl pressurization rotor disc structure to improve the turbine disk heat transfer stability, improve complete machine economy have important engineering
Application value.
Summary of the invention
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of prewhirling and be pressurized rotor disk for wheel rim sealing
Structure can both weaken the degree of combustion gas invasion, and reduce the turbine disk by being pressurized and being prewhirled processing to partially obturaging air-flow
Temperature, improve the heat transfer stability of the turbine disk, and can reduce and obturage out stream and lose with the reciprocation of mainstream, improve complete machine
Efficiency.
The technical solution adopted by the present invention to solve the technical problems is: including supercharging device of prewhirling, wheel rim sealing structure,
It installs multiple baffles additional in rotor disk disk and forms flow channel, baffle is the spiral yarn shaped structure of Fibonacci；Multiple striking Poonas
The spiral yarn shaped baffle of contract and its flow channel formed form supercharging device of prewhirling；The height of the spiral yarn shaped baffle of Fibonacci with
Radial position extension gradually increase, the flow channel of Fibonacci spiral yarn shaped baffle composition gradually expands from import to outlet
, realize pressurization of slowing down；The flow channel of Fibonacci spiral yarn shaped baffle composition make radially into obturage air-flow with tangential
Speed is flowed out from outlet, generates the effect of prewhirling, 120 degree are deflected to from channel entrance to exit angle；It preselects supercharging device and turns
Sub-disk is connected, and the spiral yarn shaped direction of Fibonacci is identical as rotor direction of rotation；Each spiral yarn shaped baffle of Fibonacci
Length is identical, and thickness is all the same from import to exporting；The lower end of wheel rim sealing structure static segment is equipped with vertical baffle, for stopping
The air-flow of obturaging of supercharging device of prewhirling outlet is flowed to stator disk, so that air flow direction wheel rim is obturaged in supercharging device outlet of prewhirling
Sealing structure.
The spiral yarn shaped number of Fibonacci is number of rotor blades purpose multiple.
The supercharging device outlet of prewhirling is opposite with wheel rim sealing structure import, wheel rim sealing structure import type face progress light
Sliding processing.
What the radial height of the vertical baffle of wheel rim sealing structure lower end and position stopped as needed obturages air-flow
Flow determine.
Beneficial effect
A kind of prewhirling and be pressurized rotor disc structure for wheel rim sealing proposed by the present invention, by being set in rotor disk disk
Meter installs multiple baffles additional and forms flow channel, and each baffle is the spiral yarn shaped structure of Fibonacci；Multiple Fibonacci helixes
Shape baffle and its flow channel formed form supercharging device of prewhirling.The flow channel of Fibonacci spiral yarn shaped baffle composition from
Import to outlet gradually expands, and realizes pressurization of slowing down；The flow channel of Fibonacci spiral yarn shaped baffle composition make radially into
Air-flow of obturaging flowed out with tangential velocity from outlet, the air-flow of obturaging close to rotor disk is pressurized and is prewhirled effect, and
The flow direction of air-flow is obturaged by wheel rim sealing structure bottom baffle control section, so that obturaging with high pressure and high tangential velocity
Air-flow enters wheel rim sealing structure.By being pressurized and being prewhirled processing to partially obturaging air-flow, combustion gas invasion can be both weakened
Degree reduces turbine disk temperature, improves turbine disk heat transfer stability, and can reduce to obturage out to flow and damage with the reciprocation of mainstream
It loses, improves the efficiency of complete machine.
Detailed description of the invention
With reference to the accompanying drawing with embodiment to the present invention it is a kind of for wheel rim sealing prewhirl be pressurized rotor disc structure make
It is further described.
Fig. 1 is installation position schematic diagram of the invention that be pressurized rotor disc structure in Gas Turbine grade of prewhirling.
Fig. 2 is supercharging device schematic diagram of prewhirling of the invention.
In figure
1. 2. turns of supercharging device 4. stator blade of quiet 3. wheel rim sealing structure of disk chamber, 5. rotor blade, 6. stators of prewhirling
7. rotor disk of disk
Specific embodiment
The present embodiment is a kind of prewhirling and be pressurized rotor disc structure for wheel rim sealing.
Refering to fig. 1, Fig. 2, the present embodiment is pressurized rotor disc structure for prewhirling for wheel rim sealing, including supercharging device of prewhirling
1, wheel rim sealing structure 3 forms flow channel by installing multiple baffles additional in rotor disk disk, and baffle is Fibonacci spiral
Linear structure；Multiple spiral yarn shaped baffles of Fibonacci and its flow channel formed form supercharging device 1 of prewhirling.The present embodiment
In, 1 import of supercharging device of prewhirling is to turn a part of quiet 2 import of disk chamber, obturages a part in air-flow close to rotor and enters in advance
Revolve supercharging device 1, the import of the outlet face wheel rim sealing structure 3 for supercharging device 1 of prewhirling.
In the present embodiment, the height of the spiral yarn shaped baffle of Fibonacci is gradually increased as radial position extends, striking Poona
The spiral yarn shaped baffle entry height of contract is 0.2mm, is exported as 2mm；The length of each spiral yarn shaped baffle of Fibonacci is the same, thick
Degree is all the same from import to exporting, with a thickness of 1mm；The spiral yarn shaped number of Fibonacci is number of rotor blades purpose multiple.This
The spiral yarn shaped number of Fibonacci is 18 in embodiment.The flow channel of Fibonacci spiral yarn shaped baffle composition is from import
It is gradually expanded to outlet, realizes pressurization of slowing down.The flow channel of Fibonacci spiral yarn shaped baffle composition make radially into
It obturages air-flow to flow out with tangential velocity from outlet, generates the effect of prewhirling, 120 degree are deflected to from channel entrance to exit angle.In advance
It selects supercharging device 1 to be fixedly connected with rotor disk 7, and is rotated with rotor disk 7, the spiral yarn shaped direction of Fibonacci and rotor rotate
Direction is identical, thus to air-flow acting is obturaged, so that obturage the speed of air-flow and pressure while increasing；Each Fibonacci spiral
The length of linear baffle is identical, and thickness is all the same from import to exporting.
Prewhirl supercharging device 1 outlet face wheel rim sealing structure 3 import, the outlet for supercharging device 1 of prewhirling and wheel rim
The import of sealing structure 3 has one section of spacing, and spacing 2mm, this allows for collision caused by stator disk 6 and the movement of rotor disk 7,
There are certain safety margins, and the air-flow of obturaging for the outlet of supercharging device 1 that makes to prewhirl further slows down pressurization.Wheel rim sealing structure
3 import type face carries out smooth treatment, so that the air-flow of obturaging for the outlet of supercharging device 1 of prewhirling easily enters wheel rim sealing
In structure 3.
The lower end design of 3 static segment of wheel rim sealing structure has vertical baffle, for the envelope for the outlet of supercharging device 1 that stops to prewhirl
Tight air-flow is flowed to stator disk 6, so that the air-flow of obturaging for the outlet of supercharging device 1 of prewhirling flows mostly to wheel rim sealing structure 3.Wheel rim
What the radial height of the vertical baffle of sealing structure lower end and position stopped as needed obturages the flow determination of air-flow；This implementation
In example, the radial height of vertical baffle is 4mm, and vertical baffle is 4mm apart from 7 wall surface of rotor disk distance.
In the present embodiment, by designing the spiral yarn shaped supercharging device 1 of prewhirling of Fibonacci in rotor disk disk, so that
The air-flow of obturaging of high pressure and high tangential velocity primarily enters wheel rim sealing structure 3, seals combustion gas mainstream in wheel rim
The Invasive degree of structure 3 reduces, and reduces and obturage out stream and the interactive loss of mainstream, to reach the improvement turbine disk
Heat transfer stability, the purpose for improving complete machine economy.
Claims (4)
1. a kind of be pressurized rotor disc structure for prewhirling for wheel rim sealing, it is characterised in that: close including supercharging device of prewhirling, wheel rim
Seal structure installs multiple baffles additional in rotor disk disk and forms flow channel, and baffle is the spiral yarn shaped structure of Fibonacci；It is multiple
The spiral yarn shaped baffle of Fibonacci and its flow channel formed form supercharging device of prewhirling；The spiral yarn shaped baffle of Fibonacci
Height is gradually increased with radial position extension, the flow channel of Fibonacci spiral yarn shaped baffle composition from import to outlet by
Flaring realizes pressurization of slowing down；The flow channel of Fibonacci spiral yarn shaped baffle composition make radially into obturage air-flow with
Tangential velocity is flowed out from outlet, generates the effect of prewhirling, 120 degree are deflected to from channel entrance to exit angle；Preselect supercharging device
It is connected with rotor disk, the spiral yarn shaped direction of Fibonacci is identical as rotor direction of rotation；Each spiral yarn shaped gear of Fibonacci
The length of plate is identical, and thickness is all the same from import to exporting；The lower end of wheel rim sealing structure static segment is equipped with vertical baffle, is used to
Stop prewhirl supercharging device outlet obturage air-flow to stator disk flow so that prewhirl supercharging device outlet obturage air flow direction
Wheel rim sealing structure.
2. according to claim 1 be pressurized rotor disc structure for prewhirling for wheel rim sealing, it is characterised in that: Fibonacci
Spiral yarn shaped number is number of rotor blades purpose multiple.
3. according to claim 1 be pressurized rotor disc structure for prewhirling for wheel rim sealing, it is characterised in that: described to prewhirl
Supercharging device outlet is opposite with wheel rim sealing structure import, and wheel rim sealing structure import type face carries out smooth treatment.
4. according to claim 1 be pressurized rotor disc structure for prewhirling for wheel rim sealing, it is characterised in that: the wheel rim
What the radial height of the vertical baffle of sealing structure lower end and position stopped as needed obturages the flow determination of air-flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689970.0A CN107387170B (en) | 2017-08-14 | 2017-08-14 | It is a kind of to be pressurized rotor disc structure for prewhirling for wheel rim sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689970.0A CN107387170B (en) | 2017-08-14 | 2017-08-14 | It is a kind of to be pressurized rotor disc structure for prewhirling for wheel rim sealing |
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| Publication Number | Publication Date |
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| CN107387170A CN107387170A (en) | 2017-11-24 |
| CN107387170B true CN107387170B (en) | 2019-05-10 |
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| CN201710689970.0A Active CN107387170B (en) | 2017-08-14 | 2017-08-14 | It is a kind of to be pressurized rotor disc structure for prewhirling for wheel rim sealing |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071492B (en) * | 2017-12-19 | 2024-07-23 | 中国联合重型燃气轮机技术有限公司 | Gas turbine and pre-rotation flow dividing device thereof |
| CN108918046B (en) * | 2018-06-06 | 2019-10-11 | 南京航空航天大学 | Hot disk edge obturages leakage characteristics experimental rig and method |
| CN110805476B (en) * | 2019-10-17 | 2022-04-12 | 南京航空航天大学 | Turbine disc with cavity structure of obturaging |
| CN111441828B (en) * | 2020-03-12 | 2022-09-16 | 中国科学院工程热物理研究所 | Engine turbine disc cavity structure with prewhirl nozzle and flow guide disc |
| CN112594014B (en) * | 2020-12-15 | 2022-05-20 | 中国科学院工程热物理研究所 | A air feeder that seals for transonic turbine plane cascade experiment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874247A (en) * | 2014-01-28 | 2016-08-17 | 三菱重工业株式会社 | Shaft seal device and rotary machine |
| EP3159488A1 (en) * | 2015-10-23 | 2017-04-26 | Doosan Heavy Industries & Construction Co., Ltd. | Sealing assembly and corresponding turbine |
-
2017
- 2017-08-14 CN CN201710689970.0A patent/CN107387170B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874247A (en) * | 2014-01-28 | 2016-08-17 | 三菱重工业株式会社 | Shaft seal device and rotary machine |
| EP3159488A1 (en) * | 2015-10-23 | 2017-04-26 | Doosan Heavy Industries & Construction Co., Ltd. | Sealing assembly and corresponding turbine |
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| Publication number | Publication date |
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| CN107387170A (en) | 2017-11-24 |
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