CN105443161A - Self-concentric brush seal structure with rotor provided with discs - Google Patents
Self-concentric brush seal structure with rotor provided with discs Download PDFInfo
- Publication number
- CN105443161A CN105443161A CN201511025282.1A CN201511025282A CN105443161A CN 105443161 A CN105443161 A CN 105443161A CN 201511025282 A CN201511025282 A CN 201511025282A CN 105443161 A CN105443161 A CN 105443161A
- Authority
- CN
- China
- Prior art keywords
- brush
- rotor
- disk
- backboard
- brush seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
- 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
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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
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
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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
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
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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
- 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)
- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Devices (AREA)
Abstract
A self-concentric brush seal structure with a rotor provided with discs comprises a brush seal part composed of a fusion welding area, a front baffle, a rear baffle and a brush wire bundle, a stator box, C-shaped seal rings, W-shaped seal rings, wear-resistant coatings, a bearing plate, the front disc, the rear disc and the rotor. The C-shaped seal rings are embedded into the neck surfaces of the front baffle and the rear baffle and are matched with the stator box. The W-shaped seal rings are clamped in the axial direction and the radial direction through the brush seal part and the stator box. The front disc is located at the lower end of the front baffle and is vertically fixed to the surface of the rotor, and the rear disc is located at the lower end of the rear baffle and is vertically fixed to the surface of the rotor. The self-concentric brush seal structure is simple; compared with traditional fixed brush seals, the self-concentric brush seal structure has the advantages that the brush seal part can move freely in the radial direction by being clamped in the stator box through the C-shaped seal rings and the W-shaped seal rings and can move along with the rotor for keeping self-concentric when the rotor moves in the radial direction, and continuous damage caused by direct rubbing between the rotor and the brush seal part can be avoided.
Description
Technical field
The present invention relates to a kind of movable sealing structure be applied in rotating machinery, particularly relate to a kind of rotor containing disk and from concentric brush seal structure.
Background technique
Brush seal is the critical component of the rotating machineries such as aeroengine, steam turbine, compressor.Relative to traditional labyrinth seal, brush seal not only has good sealing characteristics, and be a kind of flexible contact type dynamic sealing technology, the moment radial deformation or eccentric motion of rotor can be adapted to, in addition, the brush silk of brush seal and rotor shaft form flexible contact, can improve the vibration characteristics of rotor-support-foundation system, ensure the Security of unit operation, therefore brush seal is widely used in the rotating machinery of the industry fields such as Aero-Space, electric power, petrochemical industry.
Brush seal is by front screen, backboard and the compact arranged brush tow composition be installed between the two, brush seal relies on above-mentioned marshalling, brush silk and rotor are affixed incompatible partition gas downstream and cause the leakage of upstream gas and hinder thus reach the effect of sealing closely, its flow field characteristic and sealing mechanism as follows: it is uneven for brushing silk gap in brush tow, nonuniformity makes uniform incoming flow enter and just becomes uneven in brush tow, and from intensive brush tow region to loose brush tow region bias current, these bias currents form concurrent and jet gradually between brush silk, and produce random Secondary Flow and swirling flow, flow field in Seal cage becomes very complicated.When before jet runs into closely brush tow time, will moving direction be changed and become the cross flow vertical with main flow direction, the nonuniformity flowed just is guaranteed because brush tow destroys flowing, fluid is made to create selfsealings effect, lateral flow effectively promotes the generation of selfsealings effect, and the overall presure drop of the brush tow that makes to flow over increases thus reduces the leakage of sealing.
Research shows, tradition brush be sealed in the effect being subject to the higher gas differential pressure of brush tow upstream and downstream under, brush silk generation axial bending is close to backboard, frictional force between brush silk and backboard hinders brush silk to be out of shape in time, thus brush silk can not be followed the motion state such as the raising speed of rotor or the eccentric increase of whirling motion in time and is out of shape, and occurs brush silk rigidifying effect.Rigidifying effect can cause the accelerated wear test of brush silk and rotor runway, reduces the sealability of brush seal, reduction of service life.In addition along with rotor reduction of speed or when returning to less whirling motion eccentric position, the frictional force between brush silk and backboard hinders again brush silk not restore immediately, and hanging appears in brush silk, occurs brush silk hysteresis effect.What rigidifying effect and hysteresis effect can accelerate brush silk and rotor surface touches mill, reduce the sealability of brush seal, increase quantity of gas leakage, reduction of service life, and there is obviously straight-through effect in brush being sealed between mouth and outlet of tradition, fluid can be flowed out with higher axial jet, cause brush silk free end to bend and even fracture, have a strong impact on seal performance and the working life of brush seal.
In addition, the brush Seal Design of tradition with install all relative to fitting machine casket between two parties and for fixedly mount, cause when rotor generation radial disbalance moves, brush seal automatically can not be avoided and with rotor, irreversible touching occur and rub, and reduces brush seal working life.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, proposes a kind of rotor containing disk and from concentric brush seal structure.
For achieving the above object, the technical solution used in the present invention is: a kind of rotor contains disk and from concentric brush seal structure, comprises by fusion welded zone, front screen, the brush seal of backboard and brush tow composition, stator casing, W type seal ring, C type seal ring, wear resistant coating, front disk, rear disk, rotor.Front screen is connected by fusion welded zone with backboard, and brush tow root is fixed on fusion welded zone, and free end and rotor are fitted.Maintaining certain radial clearance between brush seal and stator casing makes brush seal freely to move radially.C type seal ring is embedded in front and rear baffle neck surface and matches with stator casing, and C type seal ring opening and high pressure side are connected, and from swelling under differential pressure action, realize excellent sealing.Described bearing plate is positioned at the axial middle position of brush tow, and fixed end cast welding is in fusion welded zone.Described bearing plate radial height is 0.65 ~ 0.85 times of brush filament length degree, and axial thickness is 1mm ~ 3mm.W type seal ring by brush seal and stator casing axially with clamped in the radial direction, W type seal ring is stepped up by brush seal and stator casing and produces the trend of opening, namely to brush seal be provided in axially with pretightening force in the radial direction, ensure the stable of brush seal; Described front disk is positioned at the lower end of front screen and is vertically fixed on the surface of rotor, and rear disk is positioned at the lower end of backboard and is vertically fixed on the surface of rotor, and front disk is parallel with front screen, and rear disk is parallel with backboard; Wear resistant coating is arranged on the exterior edge face of front disk and rear disk, and wear resistant coating is made up of the material of good friction characteristic, such as, and other rub resistance materials such as carbon, Teflon.
Preferably, described brush tow root is fixed by welding process, and clamps and form fusion welded zone between front screen and backboard; The brush silk of described brush tow generally adopts the Ni-based high-temperature alloy silk of diameter 0.05mm ~ 0.15mm, brush filament length degree is 25mm ~ 40mm, the axial total thickness 0.5mm ~ 20mm of brush tow, brush silk and rotor radial are 0 ~ 60 ° of established angle, and established angle is along rotor sense of rotation.
Preferably, described backboard height is 0.75 ~ 0.95 times of brush tow length, and front screen height is 0.45 ~ 0.75 times of brush tow length, and the thickness of front screen, backboard is 3mm ~ 4.5mm.The axial clearance of brush tow end row brush silk and backboard is 0 ~ 0.5mm.Wear resistant coating radial height is 0.5mm ~ 1mm, and the front and rear baffle that wear resistant coating is corresponding with it respectively keeps 0 ~ 1mm radial clearance.
The present invention proposes a kind of rotor containing disk and from concentric brush seal structure, its major advantage is as follows:
1, structure is simple, does not change the basic structure composition of traditional brush seal, only on traditional brash seal system rotor, installs anteroposterior diameter to disk, and arrange wear resistant coating at disk outward edge, be easy to processing;
2, fixing relative to tradition brush seal, brush seal can freely move radially, and when rotor moves radially, brush seal can be followed rotor movement and keep concentric, avoids rotor and brush seal directly to touch the generation sustaining breakdown that rubs;
3, the present invention installs sealed disc and has high pressure-bearing effect on the rotor of the radial corresponding position of brush seal front screen, effectively can reduce brush tow antero posterior axis to stream pressure, weaken brush silk due to High Pressure Difference generation axial bending and be close to backboard, and then effectively can reduce rigidifying effect and the hysteresis effect of sealing, reduce brush seal wearing and tearing, improve brush seal performance;
4, fixing relative to tradition brush seal, front and back disc structure and bearing plate structure add the flow resistance of seal clearance Jetstream fluid, reduce the straight-through effect causing seal leakage, improve the seal performance of Novel brush type seal system;
5, fixing relative to tradition brush seal, W type seal ring and C type seal ring play flexible fastening effect to brush seal, ensure that brush seal can be followed rotor radial and be moved, and W type seal ring and C type seal ring can effective sealing brush seal and casing gaps, improve sealing effect.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Fig. 2 is that rotor contains 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 diagram.
Fig. 5 is W type seal ring local segment structural representation.
Fig. 6 is C type sealed structural representation.
Fig. 7 is C type seal ring local segment structural representation.
In figure, 1,2 is radial W type seal ring, and 3 is fusion welded zone, and 4 is stator casing, and 5,6 is axial W type seal ring, 7,8 is C type seal ring, and 9 is front screen, 10 backboards, and 11,14 is wear resistant coating, and 12 is brush tow, 13 is front disk, and 15 is rear disk, and 16 is rotor, and 17 is bearing plate.
Embodiment:
As shown in Figure 1-Figure 3: a kind of rotor contains disk and from concentric brush seal structure, comprises radial W type seal ring 1,2, fusion welded zone 3, stator casing 4, axial W type seal ring 5,6, C type seal ring 7,8, front screen 9, backboard 10, wear resistant coating 11,14, brush tow 12, front disk 13, rear disk 15, rotor 16, bearing plate 17.Described brush seal is made up of fusion welded zone 3, front screen 9, backboard 10 and brush tow 12, maintains certain radial clearance and ensure that brush seal can freely move radially between brush seal and stator casing 4; C type seal ring 7,8 is positioned at front and rear baffle neck surface and matches with stator casing 4, and C type seal ring 7,8 opening and high pressure side are connected, and from swelling under differential pressure action, realize excellent sealing.Described bearing plate 17 is positioned at the axial middle position of brush tow, and fixed end cast welding is in fusion welded zone.Described bearing plate radial height is 0.65 ~ 0.85 times of brush filament length degree, and axial thickness is 1mm ~ 3mm.Described W type seal ring 1,2,5,6 is clamped by brush seal and stator casing 4, radial W type seal ring 1,2 is stepped up generation by brush seal and stator casing 4 and opens trend, namely provide radial tightening power to brush seal, ensure the stable of seal radial; Axial W type seal ring 5,6 is stepped up generation by brush seal and stator casing 4 and opens trend, namely provides axial pre tightening force to brush seal, ensure Sealing axially to stablize; Described front disk 13 be positioned at brush seal upstream and front screen 9 radial corresponding rotor 16 surperficial, rear disk 15 be positioned at brush seal downstream and backboard 10 radial corresponding rotor 16 surperficial, front disk 13 is parallel with brush seal front screen 9, and rear disk 15 is parallel with brush seal backboard 10; Described wear resistant coating 11,14 lays respectively at disk 13 and rear disk 15 exterior edge face before rotor, wear resistant coating 11,14 keeps 0 ~ 1mm radial clearance with the front screen 9 of brush seal, backboard 10 respectively, ensure when radial disbalance motion occurs rotor 16, by contacting of disk wear resistant coating 11,14 and front screen 9 and backboard 10, disk produces radial force to brush seal, contribute to brush seal to follow rotor 16 in time and offset and automatically keep concentric with rotor, to avoid rotor 16 or brush seal owing to directly touching the generation sustaining breakdown that rubs.Described wear resistant coating 11,14 is made up of the material of good friction characteristic, such as, other rub resistance materials such as carbon, Teflon, by making the contact of wear resistant coating and brush seal front and rear baffle, contribute to the placed in the middle of brush seal, can not damage brush seal in rotary course.
The present invention is compared with traditional brush seal, and in disk, wear resistant coating ensure that rotor discs can directly contact with front and rear baffle, relative to the brush seal that tradition is fixing, brush seal of the present invention can freely move radially, when rotor moves radially, brush seal can be followed rotor movement and keep concentric, rotor and brush seal is avoided directly to touch the generation sustaining breakdown that rubs, and disc structure adds the flow resistance of seal clearance Jetstream fluid, reduce the straight-through effect causing seal leakage, improve the seal performance of brash seal system, in addition, disc structure has high pressure-bearing effect, effectively can reduce brush tow antero posterior axis to stream pressure, and then weaken brush silk due to High Pressure Difference generation axial bending and be close to backboard, and then effectively can reduce rigidifying effect and the hysteresis effect of sealing, reduce brush seal wearing and tearing, improve brush seal performance.
Claims (3)
1. rotor contains disk and from a concentric brush seal structure, it is characterized in that: comprise by fusion welded zone, front screen, the brush seal of backboard and brush tow composition, stator casing, C type seal ring, W type seal ring, wear resistant coating, front disk, bearing plate, rear disk and rotor; Front screen is connected by fusion welded zone with backboard, and brush tow root is fixed on fusion welded zone, and free end and rotor are fitted; Described C type seal ring is embedded in front and rear baffle neck surface and matches with stator casing, C type seal ring opening and high pressure side are connected, described bearing plate is positioned at the axial middle position of brush tow, fixed end cast welding is in fusion welded zone, described bearing plate radial height is 0.65 ~ 0.85 times of brush filament length degree, axial thickness is 1mm ~ 3mm, described W type seal ring by brush seal and stator casing axially with clamped in the radial direction, W type seal ring is stepped up by brush seal and stator casing and produces the trend of opening; Described front disk is positioned at the lower end of front screen and is vertically fixed on the surface of rotor, and rear disk is positioned at the lower end of backboard and is vertically fixed on the surface of rotor, and front disk is parallel with front screen, and rear disk is parallel with backboard; Wear resistant coating is arranged on the exterior edge face of front disk and rear disk.
2. a kind of rotor as claimed in claim 1 contains disk and from concentric brush seal structure, it is characterized in that: described brush tow root is fixed by welding process, and clamps and form fusion welded zone between front screen and backboard; The brush silk of described brush tow adopts the Ni-based high-temperature alloy silk of diameter 0.05mm ~ 0.15mm, brush filament length degree is 25mm ~ 40mm, the axial total thickness 0.5mm ~ 20mm of brush tow, brush silk and rotor radial are 0 ~ 60 ° of established angle, and established angle is along rotor sense of rotation.
3. a kind of rotor as claimed in claim 1 is containing disk and from concentric brush seal structure, it is characterized in that: described backboard height is 0.75 ~ 0.95 times of brush filament length degree, front screen height is 0.45 ~ 0.75 times of brush filament length degree, the thickness of front screen, backboard is 3mm ~ 4.5mm, the axial clearance of brush tow end row brush silk and backboard is 0 ~ 0.5mm, wear resistant coating radial height is 0.5mm ~ 1mm, and the front and rear baffle that wear resistant coating is corresponding with it respectively keeps 0 ~ 1mm radial clearance.
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 true CN105443161A (en) | 2016-03-30 |
| CN105443161B CN105443161B (en) | 2017-06-16 |
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| 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 |
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| Country | Link |
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| CN (1) | CN105443161B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979740A (en) * | 2018-09-04 | 2018-12-11 | 昆明理工大学 | A kind of low abrasion labyrinth-brush composite seal device |
| CN109458228A (en) * | 2019-01-11 | 2019-03-12 | 沈阳航空航天大学 | A kind of brush seal structure for allowing rotor to invert |
| CN109578086A (en) * | 2018-11-08 | 2019-04-05 | 北京北冶功能材料有限公司 | A kind of hybrid brush sealing structure |
| CN109578087A (en) * | 2019-01-11 | 2019-04-05 | 沈阳航空航天大学 | A kind of brush seal structure suitable for rotor bidirectional rotation |
Citations (6)
| 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 |
| US20090179384A1 (en) * | 2008-01-15 | 2009-07-16 | Addis Mark E | Brush seal assembly and method of manufacturing same |
| 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 |
-
2015
- 2015-12-31 CN CN201511025282.1A patent/CN105443161B/en active Active
Patent Citations (6)
| 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 |
| US20090179384A1 (en) * | 2008-01-15 | 2009-07-16 | Addis Mark E | Brush seal assembly and method of manufacturing same |
| 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979740A (en) * | 2018-09-04 | 2018-12-11 | 昆明理工大学 | A kind of low abrasion labyrinth-brush composite seal device |
| CN108979740B (en) * | 2018-09-04 | 2023-07-21 | 昆明理工大学 | Low-abrasion labyrinth-brush type composite sealing device |
| CN109578086A (en) * | 2018-11-08 | 2019-04-05 | 北京北冶功能材料有限公司 | A kind of hybrid brush sealing structure |
| 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 |
| CN109458228A (en) * | 2019-01-11 | 2019-03-12 | 沈阳航空航天大学 | A kind of brush seal structure for allowing rotor to invert |
| CN109578087A (en) * | 2019-01-11 | 2019-04-05 | 沈阳航空航天大学 | A kind of brush seal structure suitable for rotor bidirectional rotation |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105443161B (en) | 2017-06-16 |
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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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