CN107605543B - A kind of dividing disc cavity configuration for wheel rim sealing - Google Patents
A kind of dividing disc cavity configuration for wheel rim sealing Download PDFInfo
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- CN107605543B CN107605543B CN201710689990.8A CN201710689990A CN107605543B CN 107605543 B CN107605543 B CN 107605543B CN 201710689990 A CN201710689990 A CN 201710689990A CN 107605543 B CN107605543 B CN 107605543B
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Abstract
The invention discloses a kind of dividing disc cavity configurations for wheel rim sealing, entirely turn quiet disk chamber and are divided into disk chamber silently by static segmentation baffle and turn quiet disk chamber, and disk chamber is made of stator disk and segmentation baffle silently, turn quiet disk chamber and are made of rotor disk and segmentation baffle；The outlet of disk chamber turns quiet disk chamber outlet installation seal member to the import to wheel rim sealing structure silently.The lateral exit of disk chamber is inclined wall silently, and the radial position of inclined wall is higher than the radial position for turning quiet disk chamber outlet, so that the air-flow of obturaging that the intracavitary portion's Wesco pump effect of the quiet disk of air-flow barrier turn carries of obturaging of disk chamber outlet is directly acted on combustion gas mainstream silently.Disk chamber is since wall surface relative velocity is zero silently, effectively weaken the Wesco pump effect of disk chamber, and weaken effect of the Wesco pump effect to main combustion gas, and then weaken the degree of combustion gas invasion or reduce required for prevention combustion gas is invaded and obturage air-flow, it reduces the temperature of the turbine disk, improve gas turbine proficiency.
Description
Technical field
The present invention relates to Gas Turbine technical fields, specifically, being related to a kind of dividing disc for wheel rim sealing
Cavity configuration.
Background technique
There are an annular compartments to be known as turbine disk chamber, the combustion of turbine disk chamber between Gas Turbine rotor disk and stator disk
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, damages the safe and reliable operation of gas turbine, and cause to fire
Gas-turbine loss of efficiency.The turbine disk and installation mainly are cooled down by introducing low-temperature airflow from compressor stage in engineering at present
The measures such as the wheel rim sealing of advanced configuration solve.
Turn the quiet further analysis of disk chamber to turbine to find, due to turning the relative rotation of quiet wall surface, necessarily leads to the pump efficiency that rubs
The presence answered.Therefore, it reduces the speed of relative rotation or there is no relatively rotate obviously weaken or even evade Wesco pump
Effect.Meanwhile when the air-flow of Wesco pump effect rolling action is not direct and main combustion gas reciprocation, it can also weaken friction pump efficiency
It answers caused combustion gas invasion to act on, obturages air-flow stream needed for can obviously reduce combustion gas invasion air flow rate in this way or reducing
Amount.Therefore, the cavity body structure that can effectively weaken Wesco pump effect and corresponding combustion gas Invasive degree is stablized to turbine disk heat transfer is improved
Property, improve gas turbine 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 dividing disc cavity configuration for wheel rim sealing；
The dividing disc cavity configuration can effectively weaken the Wesco pump effect of disk chamber, and weaken effect of the Wesco pump effect to main combustion gas,
And then reduce the degree of combustion gas invasion, the temperature of the turbine disk is reduced, the heat transfer stability of the turbine disk is improved.
The technical solution adopted by the present invention to solve the technical problems is: the dividing disc cavity configuration sealed for wheel rim,
It is characterized in that entirely turning quiet disk chamber is divided into disk chamber silently by static segmentation baffle and turns quiet disk chamber；Disk chamber is by stator disk silently
With segmentation baffle composition, turns quiet disk chamber and be made of rotor disk and segmentation baffle, the position for dividing baffle makes the outlet of disk chamber silently
To the import to wheel rim sealing structure, turn quiet disk chamber outlet installation radial seal component；
The left wall face of the chamber of the disk silently outlet is inclined wall, and tilt angle is 30 degree, so that muzzle velocity has axis
To component；The radial position of inclined wall is higher than the radial position for turning quiet disk chamber outlet, and the air-flow of obturaging of disk chamber outlet hides silently
Gear turns quiet disk chamber outlet, is directly made with the air-flow of obturaging that the intracavitary portion's Wesco pump effect of quiet disk carries is turned with barrier with combustion gas mainstream
With；
The outlet for turning quiet disk chamber is the radial end face of the upper surface of segmentation baffle and the lower end surface composition of wheel rim sealing structure,
Turn the export direction of quiet disk chamber perpendicular to wheel rim sealing structure import；
Disk chamber air inlet is located at stator pan bottom silently, is straight hole channel, for obturaging air-flow vertically into disk chamber silently,
Disk chamber air inlet bore dia is 4.5~9.0mm silently.
Disk chamber air inlet is straight hole or angling hole silently, and the inclined direction of angling hole is identical as rotor direction of rotation.
The quantity of disk chamber air inlet is the quantity of stator blade or rotor blade silently.
Beneficial effect
A kind of dividing disc cavity configuration for wheel rim sealing proposed by the present invention, entirely turns quiet disk chamber and is kept off by static segmentation
Plate is divided into disk chamber silently and turns a quiet disk chamber, and disk chamber is made of stator disk and segmentation baffle silently, turn quiet disk chamber by rotor disk and
Divide baffle composition；The import of the outlet face wheel rim sealing structure of disk chamber silently turns quiet disk chamber outlet installation seal member.It is quiet
The lateral exit of quiet disk chamber is inclined wall, and the radial position of inclined wall is higher than the radial position for turning quiet disk chamber outlet,
So that silently the outlet of disk chamber obturage that air-flow barrier turns that the intracavitary portion's Wesco pump effect of quiet disk carries obturage air-flow and combustion gas mainstream
Directly act on.Disk chamber can effectively weaken the Wesco pump effect of disk chamber since wall surface relative velocity is zero silently, and weaken and rub
The effect that pump efficiency copes with main combustion gas is wiped, and then weakens the degree of combustion gas invasion or reduces required for prevention combustion gas is invaded and obturage
Air-flow reduces the temperature of the turbine disk, the technical effect for improving turbine disk heat transfer stability, improving gas turbine economy.
Detailed description of the invention
Make with reference to the accompanying drawing with the embodiment dividing disc cavity configuration for wheel rim sealing a kind of to the present invention further
It is described in detail.
Fig. 1 is that the present invention is used for schematic diagram of the dividing disc cavity configuration of wheel rim sealing in Gas Turbine grade.
Fig. 2 is the chamber air inlet structure schematic diagram of disk silently of the invention.
In figure
1. turn quiet disk chamber 2. 6. turns of 4. wheel rim sealing structure of disk chamber air inlet, 5. stator blade silently of disk chamber 3. silently
7. stator disk of blades, 8. rotor disk 9. divides baffle
Specific embodiment
The present embodiment is a kind of dividing disc cavity configuration for wheel rim sealing.
Refering to fig. 1, Fig. 2, the present invention are used for the dividing disc cavity configuration of wheel rim sealing, entirely turn quiet disk chamber by static point
Baffle 9 is cut to be divided into disk chamber 2 silently and turn quiet disk chamber 1；Disk chamber 2 is made of stator disk 7 and segmentation baffle 9 silently, turns quiet disk chamber 1
It is made of rotor disk 8 and segmentation baffle 9, the position of segmentation baffle 9 makes the outlet of disk chamber 2 silently to wheel rim sealing structure 4
Import turns the quiet outlet of disk chamber 1 installation radial seal component.
In the present embodiment, segmentation baffle 9 is that stationary parts is fixed together with stator disk 7, is kept off by stator disk 7 and segmentation
It punches to form disk chamber air inlet 3 silently in the coupling part of plate 9.Disk chamber air inlet 3 is straight hole silently, obturages air-flow vertically into quiet
Quiet disk chamber 2.Silently disk chamber air inlet 3 or be angling hole, the inclined direction of angling hole is identical as rotor direction of rotation, so as to for
Air-flow of obturaging into disk chamber 2 silently provides the effect of prewhirling.The position of disk chamber air inlet 3 is the middle part of stator pan bottom silently
Position, for obturaging air-flow vertically into disk chamber silently, the quantity of disk chamber air inlet 3 is stator blade 5 or rotor blade 6 silently
Quantity, silently the value range of 3 diameter of disk chamber air inlet be 4.5~9.0mm.
The outlet of disk chamber 2 is right against the import of wheel rim sealing structure 4 silently, and the left wall face that disk chamber 2 exports silently is inclination
Wall surface, tilt angle is 30 degree, so that muzzle velocity has axial component.The radial position of inclined wall, which is higher than, turns quiet disk chamber 1
The radial position of outlet is 2.0~5.0mm, makes obturaging air-flow and blocking and turn quiet disk chamber outlet for the outlet of disk chamber silently, barrier turns
The air-flow of obturaging that quiet 1 internal friction pump efficiency of disk chamber should carry directly is acted on combustion gas mainstream.
The outlet for turning quiet disk chamber 1 is the radial direction formed by the upper surface of segmentation baffle 9 and the lower end surface of wheel rim sealing structure 4
End face, the outlet for turning quiet disk chamber 1 is the 1~2% of rotor disk wall face height.Comb tooth seal member or brush are installed in radial end face
Formula seal member, the air-flow of obturaging that turning quiet 1 internal friction pump efficiency of disk chamber with further barrier should carry directly are made with combustion gas mainstream
With.
Dividing baffle 9 can get through in partially perforation and turn quiet disk chamber 1 and silently disk chamber 2, so that the gas that Wesco pump effect carries
Stream recycles in the intracavitary portion of disk, especially at the low radius of disk chamber, so that the Wesco pump effect for turning quiet disk chamber 1 is further limited in
The intracavitary portion of disk.
When it is implemented, mainstream air-flow flows through stator blade 5, rotor blade 6；It obturages air-flow and is divided into two strands, one inflow
Turn quiet disk chamber 1, one flows into disk chamber 2 silently by disk chamber air inlet 3 silently, obturages air-flow eventually by wheel rim sealing structure 4
Into mainstream channel.Occur combustion gas invasion when, mainstream combustion gas can enter wheel rim sealing structure 4, by wheel rim sealing structure 4 into
Enter disk chamber 2 silently.
Turn quiet 1 Wesco pump effect of disk chamber and is almost limited in the intracavitary portion of disk, it is very weak with the reciprocation of mainstream.Meanwhile it is quiet
Wesco pump effect is not present since wall surface relative velocity is zero in quiet disk chamber 2, the hair for also causing combustion gas to be invaded without Wesco pump effect
Raw, obviously the degree of decrease combustion gas invasion or reduction obturage air-flow required for preventing combustion gas from invading in this way.Combustion gas occurs to enter
When invading, invasion combustion gas mainly obturages airflow function in disk chamber 2 silently, even if serious combustion gas invasion occurs, invades combustion gas
Also the wall surface of disk chamber 2 silently can be only acted on, and the influence very little to rotor disk, stablize to reach and improve turbine disk heat transfer
Property, improve gas turbine economy purpose.
Claims (3)
1. a kind of dividing disc cavity configuration for wheel rim sealing, it is characterised in that: entirely turn quiet disk chamber by static segmentation baffle
It is divided into disk chamber silently and turns quiet disk chamber；Disk chamber is made of stator disk and segmentation baffle silently, is turned quiet disk chamber by rotor disk and is divided
Baffle composition is cut, the position for dividing baffle makes the outlet of disk chamber silently to the import of alignment wheel rim sealing structure, turns quiet disk chamber and goes out
Mouth installation radial seal component；
The left wall face of the chamber of the disk silently outlet is inclined wall, and tilt angle is 30 degree, so that muzzle velocity has axial point
Amount；The radial position of inclined wall is higher than the radial position for turning the outlet of quiet disk chamber, and the air-flow of obturaging of disk chamber outlet blocks and turns silently
Quiet disk chamber outlet is directly acted on for obstructing the air-flow of obturaging that turn quiet intracavitary portion's Wesco pump effect of disk carries with combustion gas mainstream；
The outlet for turning quiet disk chamber is the radial end face of the upper surface of segmentation baffle and the lower end surface composition of wheel rim sealing structure, is turned quiet
The export direction of disk chamber is perpendicular to wheel rim sealing structure import；
Disk chamber air inlet is located at stator pan bottom silently, is straight hole channel, for obturaging air-flow vertically into disk chamber silently, silently
Disk chamber air inlet bore dia is 4.5~9.0mm.
2. it is according to claim 1 for wheel rim sealing dividing disc cavity configuration, it is characterised in that: the chamber of disk silently into
Stomata is straight hole or angling hole, and the inclined direction of angling hole is identical as rotor direction of rotation.
3. it is according to claim 1 for wheel rim sealing dividing disc cavity configuration, it is characterised in that: the chamber of disk silently into
The quantity of stomata is the quantity of stator blade or rotor blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689990.8A CN107605543B (en) | 2017-08-14 | 2017-08-14 | A kind of dividing disc cavity configuration for wheel rim sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689990.8A CN107605543B (en) | 2017-08-14 | 2017-08-14 | A kind of dividing disc cavity configuration for wheel rim sealing |
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| Publication Number | Publication Date |
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| CN107605543A CN107605543A (en) | 2018-01-19 |
| CN107605543B true CN107605543B (en) | 2019-05-10 |
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| CN201710689990.8A Active CN107605543B (en) | 2017-08-14 | 2017-08-14 | A kind of dividing disc cavity configuration for wheel rim sealing |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523813B (en) * | 2019-09-19 | 2022-09-16 | 中国航发商用航空发动机有限责任公司 | Aeroengine turbine rim sealing structure |
| CN110750845B (en) * | 2019-11-13 | 2024-04-05 | 中国科学院工程热物理研究所 | Method for improving sealing efficiency of disc cavity based on end wall rough area |
| CN111963320B (en) * | 2020-08-24 | 2021-08-24 | 浙江燃创透平机械股份有限公司 | Gas turbine interstage seal ring structure |
| CN112302731B (en) * | 2020-10-27 | 2022-11-18 | 西北工业大学 | Radial rim sealing structure for multi-row tapered cylindrical hole shape of turbine disc |
| CN112431639A (en) * | 2020-11-27 | 2021-03-02 | 北京化工大学 | Can restrain rim seal structure of inhomogeneous multiscale gas invasion |
| CN114961889B (en) * | 2021-02-20 | 2024-04-16 | 中国航发商用航空发动机有限责任公司 | Turbine rotating static disc cavity airflow swirl ratio measuring method |
| CN117928832B (en) * | 2024-03-21 | 2024-05-17 | 太仓点石航空动力有限公司 | Turbine disc cavity sealing efficiency testing method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314651A (en) * | 1964-04-09 | 1967-04-18 | Rolls Royce | Sealing device |
| CN101761363A (en) * | 2009-12-28 | 2010-06-30 | 东方电气集团东方汽轮机有限公司 | Sealing structure of scapular of diaphragm of steam turbine |
| CN204716309U (en) * | 2015-04-16 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas turbine turbine and gas sealing structure thereof |
-
2017
- 2017-08-14 CN CN201710689990.8A patent/CN107605543B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314651A (en) * | 1964-04-09 | 1967-04-18 | Rolls Royce | Sealing device |
| CN101761363A (en) * | 2009-12-28 | 2010-06-30 | 东方电气集团东方汽轮机有限公司 | Sealing structure of scapular of diaphragm of steam turbine |
| CN204716309U (en) * | 2015-04-16 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas turbine turbine and gas sealing structure thereof |
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