CN105443161B - A kind of rotor is containing disk and from concentric brush seal structure - Google Patents
A kind of rotor is containing disk and from concentric brush seal structure Download PDFInfo
- Publication number
- CN105443161B CN105443161B CN201511025282.1A CN201511025282A CN105443161B CN 105443161 B CN105443161 B CN 105443161B CN 201511025282 A CN201511025282 A CN 201511025282A CN 105443161 B CN105443161 B CN 105443161B
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- China
- Prior art keywords
- brush
- rotor
- brush seal
- disk
- backboard
- 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.)
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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
- 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
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
-
- 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
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/20—Oxide or non-oxide ceramics
- F05D2300/22—Non-oxide ceramics
- F05D2300/224—Carbon, e.g. graphite
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
- F05D2300/432—PTFE [PolyTetraFluorEthylene]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sealing Devices (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
A kind of rotor is containing disk and from concentric brush seal structure, including the brush seal being made up of fusion welded zone, front apron, backboard and brush wire bundle, stator casing, C-shaped sealing ring, W type sealing rings, wear-resistant coating, bearing plate, preceding disk, rear disk and rotor.The C-shaped sealing ring is embedded in front and rear baffle neck surface and is engaged with stator casing.The W types sealing ring by brush seal and stator casing it is axial be clamped in the radial direction.The preceding disk is located at the lower end of front apron and is vertically fixed on the surface of rotor, and rear disk is located at the lower end of backboard and is vertically fixed on the surface of rotor.Simple structure of the present invention, the brush seal fixed relative to tradition, brush seal of the present invention is held in stator casing by some groups of C-shaped sealing rings and W type sealing rings, ensure that brush seal can be moved freely radially, when rotor is moved radially, brush seal can follow rotor movement and keep concentric, it is to avoid rotor directly touches the generation sustaining breakdown that rubs with brush seal.
Description
Technical field
The present invention relates to a kind of movable sealing structure being applied in rotating machinery, more particularly to a kind of rotor containing disk and from
Concentric brush seal structure.
Background technology
Brush seal is the critical component of the rotating machineries such as aero-engine, steam turbine, compressor.Relative to traditional fan
Palace seals, and brush seal not only has preferable sealing characteristics, and is a kind of flexible contact type dynamic sealing technology, can adapt to
The moment radial deformation or eccentric motion of rotor, additionally, the brush filament of brush seal forms flexible contact with armature spindle, can improve and turn
The vibration characteristics of subsystem, it is ensured that the security of unit operation, thus brush seal be widely used in Aero-Space, electric power,
In the rotating machinery of the industry fields such as petrochemical industry.
Brush seal is made up of front apron, backboard and the compact arranged brush wire bundle for clamping therebetween, brush close
Envelope fits by above-mentioned marshalling, close brush filament and rotor and cause separating gas downstream and leakage to upstream gas
Hinder so as to reach the effect of sealing, its flow field characteristic is as follows with sealing mechanism：In brush wire bundle brush filament gap be it is uneven, no
Uniformity causes uniformly just to become uneven into brush wire bundle flowing, and from intensive brush wire bundle region to loose brush
Tow region bias current, these bias currents gradually form concurrent and jet between brush filament, and produce random Secondary Flow and vortex
Stream, the flow field in annular seal space becomes extremely complex.When jet runs into above closely brush wire bundle, will change the direction of motion and
Become the horizontal stream vertical with main flow direction, the inhomogeneities of flowing is just ensured because brush wire bundle destroys flowing, produce fluid
Self sealss effect is given birth to, lateral flow is effectively promoted the generation of self sealss effect, the overall presure drop of the brush wire bundle that makes to flow over increases
So as to reduce the leakage of sealing.
Research shows that tradition is brush to be sealed in by the presence of brush wire bundle upstream and downstream gas differential pressure higher, brush filament occurs
Axial bending is close to backboard, and the frictional force between brush filament and backboard hinders brush filament to deform in time, so that brush filament can not be timely
Follow the motion states such as raising speed or the eccentric increase of whirling motion of rotor to be deformed, brush filament rigidifying effect occur.Rigidifying effect meeting
Cause the accelerated wear test of brush filament and rotor runway, reduce the sealing property of brush seal, reduction of service life.In addition with rotor
Reduction of speed or when returning to smaller whirling motion eccentric position, the frictional force between brush filament and backboard hinders the brush filament can not to answer immediately again
There is suspension in original, brush filament, brush filament hysteresis effect occurs.Rigidifying effect and hysteresis effect can accelerate touching for brush filament and rotor surface
Mill, reduce brush seal sealing property, increase quantity of gas leakage, reduction of service life, and tradition it is brush be sealed into mouth with
There is substantially straight-through effect between outlet so that fluid can be flowed out with axial jet higher, cause brush filament free end to bend very
To fractureing, the seal performance and service life of brush seal are had a strong impact on.
In addition, traditional brush Seal Design between two parties and is fixed installation both with respect to installation casing with installation, cause
When rotor occurs radial disbalance to move, brush seal can not automatically be avoided and irreversible touching occur with rotor and rubs, and reduce brush
Formula seals service life.
The content of the invention
The technical problems to be solved by the invention are directed to above-mentioned the deficiencies in the prior art, it is proposed that a kind of rotor contains disk
And from concentric brush seal structure.
To achieve the above object, the technical solution adopted by the present invention is：A kind of rotor is containing disk and from concentric brush close
Seal structure, including the brush seal being made up of fusion welded zone, front apron, backboard and brush wire bundle, stator casing, W type sealing rings,
C-shaped sealing ring, wear-resistant coating, preceding disk, rear disk, rotor.Front apron and backboard are connected by fusion welded zone, brush wire bundle root
It is fixed on fusion welded zone, free end is fitted with rotor.Certain radial clearance is maintained between brush seal and stator casing to be made
Obtaining brush seal can freely radially move.C-shaped sealing ring is embedded in front and rear baffle neck surface and is engaged with stator casing, C
Type sealing ring opening is connected with high-pressure side, from swelling under differential pressure action, realizes excellent sealing.The bearing plate is located at brush filament
Beam axial direction middle position, fixing end cast welding is in fusion welded zone.The bearing plate radial height is 0.65~0.85 times of brush filament length,
Axial width is 1mm~3mm.W types sealing ring by brush seal and stator casing it is axial be clamped in the radial direction,
W types sealing ring is clamped by brush seal and stator casing and trend is opened in generation, i.e., provided in axial direction and footpath to brush seal
To pretightning force on direction, it is ensured that the stabilization of brush seal；The preceding disk is located at the radially inner side of front apron and vertically fixes
On the surface of rotor, rear disk is located at the radially inner side of backboard and is vertically fixed on the surface of rotor, preceding disk and front apron
Parallel, rear disk is parallel with backboard；Wear-resistant coating is arranged on the radial outer end face of preceding disk and rear disk, and wear-resistant coating is
It is made up of the material of good friction characteristic, for example, other rub resistance materials such as carbon, Teflon.
Preferably, the brush wire bundle root is fixed by welding process, and is clamped in shape between front apron and backboard
Into fusion welded zone；The brush filament of the brush wire bundle is typically using the Ni-based high-temperature alloy silk of diameter 0.05mm~0.15mm, and brush filament is long
It is 25mm~40mm to spend, the axial gross thickness 0.5mm~20mm of brush wire bundle, and brush filament is in 0~60 ° of established angle with rotor radial, is installed
Angle is along rotor direction of rotation.
Preferably, the backboard is highly 0.75~0.95 times of brush wire bundle length, and front apron is highly for brush wire bundle is long
0.45~0.75 times of degree, front apron, the thickness of backboard are 3mm~4.5mm.Brush wire bundle end row brush silk and the axial direction of backboard
Gap is 0~0.5mm.Wear-resistant coating radial height is 0.5mm~1mm, and wear-resistant coating is distinguished corresponding front and rear baffle and protected
Hold 0~1mm radial clearances.
The present invention proposes a kind of rotor containing disk and from concentric brush seal structure, and its major advantage is as follows：
1st, simple structure, the basic structure composition of traditional brush seal is not changed, only in traditional brash seal system rotor
Radial direction disk before and after upper installation, and wear-resistant coating is set in disk outward flange, it is easy to process；
2nd, the brush seal fixed relative to tradition, brush seal can be moved freely radially, when rotor occurs radially
Brush seal can follow rotor movement and keep concentric when mobile, it is to avoid rotor directly touches the generation that rubs with brush seal and holds
Continuous destruction；
3rd, the present invention installs sealed disc on the rotor of brush seal front apron radial direction correspondence position, and there is pressure-bearing high to make
With, axial stream pressure before and after brush wire bundle can be effectively reduced, weaken brush filament because High Pressure Difference occurs to be kept off after axial bending is close to
Plate, and then the rigidifying effect and hysteresis effect of sealing can be effectively reduced, brush seal abrasion is reduced, improve brush seal performance；
4th, the brush seal fixed relative to tradition, front and rear disc structure and bearing plate structure increased seal clearance jet
The flow resistance of fluid, reduces the straight-through effect for causing sealing leak, improves the seal performance of Novel brush type seal system；
5th, the brush seal fixed relative to tradition, it is solid that W types sealing ring plays elasticity to brush seal with C-shaped sealing ring
It is set for using, it is ensured that brush seal can follow rotor radial movement, and W types sealing ring can be effectively close with C-shaped sealing ring
Envelope brush seal and casing gap, improve sealing effectiveness.
Brief description of the drawings：
Fig. 1 is structural representation of the invention.
Fig. 2 is rotor containing disk and from the partial schematic diagram of concentric brush seal structure.
Fig. 3 is the structural representation of rotor.
Fig. 4 is W type seal ring structure schematic diagrames.
Fig. 5 is W type sealing ring local segment structural representations.
Fig. 6 is c-type sealed structural representation.
Fig. 7 is C-shaped sealing ring local segment structural representation.
In figure, 1,2 is radial direction W type sealing rings, and 3 is fusion welded zone, and 4 is stator casing, and 5,6 is axial direction W type sealing rings, 7,8
Be C-shaped sealing ring, 9 is front apron, 10 backboards, 11,14 is wear-resistant coating, 12 is brush wire bundle, 13 is preceding disk, 15 be after circle
Disk, 16 is rotor, and 17 is bearing plate.
Specific embodiment：
As shown in Figure 1-Figure 3：A kind of rotor is containing disk and from concentric brush seal structure, including radial direction W type sealing rings
1st, 2, fusion welded zone 3, stator casing 4, axial W types sealing ring 5,6, C-shaped sealing ring 7,8, front apron 9, backboard 10, wear-resistant coating
11st, 14, brush wire bundle 12, preceding disk 13, rear disk 15, rotor 16, bearing plate 17.The brush seal is by fusion welded zone 3, front
Plate 9, backboard 10 and brush wire bundle 12 are constituted, and maintain certain radial clearance to ensure brush between brush seal and stator casing 4
Formula seal can be moved freely radially；C-shaped sealing ring 7,8 is engaged positioned at front and rear baffle neck surface with stator casing 4, c-type
The opening of sealing ring 7,8 is connected with high-pressure side, from swelling under differential pressure action, realizes excellent sealing.The bearing plate 17 is located at
Brush wire bundle axial direction middle position, fixing end cast welding is in fusion welded zone.The bearing plate radial height for brush filament length 0.65~
0.85 times, axial width is 1mm~3mm.The W types sealing ring 1,2,5,6 is pressed from both sides by brush seal and stator casing 4
Hold, radial direction W types sealing ring 1,2 clamps generation and opens trend by brush seal and stator casing 4, i.e., provided to brush seal
Radial tightening power, it is ensured that the stabilization of seal radial；Axial W types sealing ring 5,6 clamps product by brush seal and stator casing 4
Life open trend, that is, give brush seal provide axial pre tightening force, it is ensured that seal axially to stabilization；13, the preceding disk
In brush seal upstream rotor 16 surface radially corresponding with front apron 9, rear disk 15 is located at brush seal downstream and rear gear
The radially corresponding surface of rotor 16 of plate 10, preceding disk 13 is parallel with brush seal front apron 9, after rear disk 15 and brush seal
Baffle plate 10 is parallel；The wear-resistant coating 11,14 respectively be located at rotor before disk 13 and the outer face of rear disk 15, wear-resistant coating 11,
14 front apron 9, the holding 0~1mm radial clearances of backboard 10 respectively with brush seal, it is ensured that when rotor 16 occurs radial disbalance
During motion, by the contact with front apron 9 and backboard 10 of disk wear-resistant coating 11,14, disk produces footpath to brush seal
Xiang Li, contribute to brush seal follow in time rotor 16 offset and automatically with rotor keep it is concentric, with avoid rotor 16 or
Brush seal is due to directly touching the generation sustaining breakdown that rubs.The wear-resistant coating 11,14 is by the material group of good friction characteristic
Into for example, other rub resistance materials such as carbon, Teflon, by making the contact of wear-resistant coating and brush seal front and rear baffle, have
Help the placed in the middle of brush seal, brush seal will not be damaged in rotary course.
It is of the invention compared with traditional brush seal, wear-resistant coating ensure that rotor discs can be straight with front and rear baffle in disk
Contact；The brush seal fixed relative to tradition, brush seal of the present invention can be moved freely radially, when rotor occurs footpath
Brush seal can follow rotor movement and keep concentric during to movement, it is to avoid rotor directly touches the generation that rubs with brush seal
Sustaining breakdown, and disc structure increased the flow resistance of seal clearance Jetstream fluid, reduces and causes the straight of sealing leak
Logical effect, improves the seal performance of brash seal system, in addition, there is disc structure pressure-bearing high to act on, can effectively reduce
Axial stream pressure before and after brush wire bundle, and then weaken brush filament because High Pressure Difference generation axial bending is close to backboard, and then can have
Effect reduces the rigidifying effect and hysteresis effect of sealing, reduces brush seal abrasion, improves brush seal performance.
Claims (3)
1. a kind of rotor is containing disk and from concentric brush seal structure, it is characterised in that：Including by fusion welded zone, front apron, after
The brush seal of baffle plate and brush wire bundle composition, stator casing, C-shaped sealing ring, W type sealing rings, wear-resistant coating, preceding disk holds
Pressing plate, rear disk and rotor；Front apron and backboard are connected by fusion welded zone, and brush wire bundle root is fixed on fusion welded zone, freely
Fitted with rotor at end；The C-shaped sealing ring is embedded in front and rear baffle neck surface and is engaged with stator casing, and C-shaped sealing ring is opened
Mouthful be connected with high-pressure side, the bearing plate is located at the axial middle position of brush wire bundle, fixing end cast welding in fusion welded zone, the pressure-bearing
Plate radial height is 0.65~0.85 times of brush filament length, and axial width is 1mm~3mm, and the W types sealing ring is by brush close
Sealing and stator casing axially be clamped in the radial direction, W types sealing ring is by brush seal and the clamping of stator casing
Trend is opened in generation；The preceding disk is located at the radially inner side of front apron and is vertically fixed on the surface of rotor, and rear disk is located at
The radially inner side of backboard is simultaneously vertically fixed on the surface of rotor, and preceding disk is parallel with front apron, and rear disk is parallel with backboard；
Wear-resistant coating is arranged on the radial outer end face of preceding disk and rear disk.
2. a kind of rotor as claimed in claim 1 is containing disk and from concentric brush seal structure, it is characterised in that：The brush
Tow root is fixed by welding process, and is clamped in fusion welded zone is formed between front apron and backboard；The brush wire bundle
Brush filament uses the Ni-based high-temperature alloy silk of diameter 0.05mm~0.15mm, and brush filament length is 25mm~40mm, brush wire bundle axial direction
Gross thickness 0.5mm~20mm, brush filament is in 0~60 ° of established angle with rotor radial, and established angle is along rotor direction of rotation.
3. a kind of rotor as claimed in claim 1 is containing disk and from concentric brush seal structure, it is characterised in that：After described
Height of baffle plate is 0.75~0.95 times of brush filament length, and front apron highly is 0.45~0.75 times of brush filament length, front apron with
The thickness of backboard is 3mm~4.5mm, and brush wire bundle end row brush silk and the axial gap of backboard are 0~0.5mm, wear-resistant coating
Radial height is 0.5mm~1mm, and wear-resistant coating distinguishes corresponding front and rear baffle and keeps 0~1mm radial clearances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511025282.1A CN105443161B (en) | 2015-12-31 | 2015-12-31 | A kind of rotor is containing disk and from concentric brush seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511025282.1A CN105443161B (en) | 2015-12-31 | 2015-12-31 | A kind of rotor is containing disk and from concentric brush seal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105443161A CN105443161A (en) | 2016-03-30 |
| CN105443161B true CN105443161B (en) | 2017-06-16 |
Family
ID=55553743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511025282.1A Active CN105443161B (en) | 2015-12-31 | 2015-12-31 | A kind of rotor is containing disk and from concentric brush seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105443161B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979740B (en) * | 2018-09-04 | 2023-07-21 | 昆明理工大学 | Low-abrasion labyrinth-brush type composite sealing device |
| CN109578086B (en) * | 2018-11-08 | 2021-07-30 | 北京北冶功能材料有限公司 | Composite brush type sealing structure |
| CN109458228B (en) * | 2019-01-11 | 2023-08-15 | 沈阳航空航天大学 | Brush type sealing structure allowing rotor to rotate reversely |
| CN109578087B (en) * | 2019-01-11 | 2023-08-29 | 沈阳航空航天大学 | Brush type sealing structure suitable for rotor bidirectional rotation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1308655A2 (en) * | 2001-11-01 | 2003-05-07 | ALSTOM (Switzerland) Ltd | Brush seals |
| JP4054608B2 (en) * | 2002-05-23 | 2008-02-27 | イーグル工業株式会社 | Plate brush seal |
| CN103711527A (en) * | 2014-01-17 | 2014-04-09 | 清华大学 | Brush type sealing and fingertip sealing combined seal |
| CN104047640A (en) * | 2014-06-10 | 2014-09-17 | 清华大学 | Brush type sealing structure with adjustable radial clearance |
| CN104089018A (en) * | 2014-06-26 | 2014-10-08 | 南京博沃科技发展有限公司 | Brush seal with restrained bristles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8727354B2 (en) * | 2008-01-15 | 2014-05-20 | United Technologies Corporation | Brush seal assembly and method of manufacturing same |
-
2015
- 2015-12-31 CN CN201511025282.1A patent/CN105443161B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1308655A2 (en) * | 2001-11-01 | 2003-05-07 | ALSTOM (Switzerland) Ltd | Brush seals |
| JP4054608B2 (en) * | 2002-05-23 | 2008-02-27 | イーグル工業株式会社 | Plate brush seal |
| CN103711527A (en) * | 2014-01-17 | 2014-04-09 | 清华大学 | Brush type sealing and fingertip sealing combined seal |
| CN104047640A (en) * | 2014-06-10 | 2014-09-17 | 清华大学 | Brush type sealing structure with adjustable radial clearance |
| CN104089018A (en) * | 2014-06-26 | 2014-10-08 | 南京博沃科技发展有限公司 | Brush seal with restrained bristles |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105443161A (en) | 2016-03-30 |
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Effective date of registration: 20190516 Address after: 210000 Tianyuan East Road 1009, Jiangning District High-tech Park, Nanjing City, Jiangsu Province Patentee after: Nanjing Yunqi Resonant Power Technology Co., Ltd. Address before: 110136 No. 37 Daoyi South Street, Shenbei New District, Shenyang City, Liaoning Province Patentee before: Shenyang Aerospace University |
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