CN108979741A - It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal - Google Patents
It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal Download PDFInfo
- Publication number
- CN108979741A CN108979741A CN201811024504.1A CN201811024504A CN108979741A CN 108979741 A CN108979741 A CN 108979741A CN 201811024504 A CN201811024504 A CN 201811024504A CN 108979741 A CN108979741 A CN 108979741A
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- China
- Prior art keywords
- brush
- wire bundle
- downstream
- brush wire
- upstream
- 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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- 238000005299 abrasion Methods 0.000 title claims abstract description 15
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 54
- 230000004927 fusion Effects 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
-
- 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
- F05D2240/56—Brush seals
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention relates to it is a kind of can unitary rotation the high pressure-bearing brush seal of low abrasion, belong to technical field of mechanical.The present invention includes including bearing, brush filament ring；Brush filament ring outer ring interference fit is mounted on bearing inner race, and brush filament ring includes: front apron, rear baffle, upstream brush wire bundle, downstream brush wire bundle；Front apron is located at upstream brush wire bundle front, and rear baffle is located at downstream brush wire bundle rear portion, and front apron, rear baffle and upstream brush wire bundle, downstream brush wire bundle root form fusion welded zone by welding process.Brush filament ring rotation of the present invention can effectively reduce the fretting wear between brush wire bundle end and rotor, and the service life of brush filament ring can be improved, and compared to other structures for reducing brush seal abrasion, effect is more preferable；Downstream brush filament can bearing capacity it is high, axial bending caused by can reducing brush filament after by resistance causes to leak caused by gap, while rigidifying effect and hesitation can be effectively reduced, and the cost of material is low；Structure is simple, easy to disassemble, is easily changed maintenance.
Description
Technical field
The present invention relates to it is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal, belong to mechanical sealing technology neck
Domain.
Background technique
Brush seal is one of the critical component in turbomachine, is that a kind of can substantially reduce the secondary flow path of aero-engine
The new type sealing device of air loss.It is most simple, most practical, the most effective product instead of labyrinth seal.Engine
Application practice proves, only at engine one or a few place's key position application brush seals, so that it may so that the thrust of engine mentions
It is high by 1% ~ 3%, fuel consumption rate decline 3% ~ 5%.Two problems of wear-out life and leakage are the most important two indices of sealing.
The sealing principle of brush seal is to play flowing resistance to the fluid of upstream and downstream by the compact brush filament of tens of thousands of arrangements
The effect hindered, the generation friction thermal wear that contacts with each other between a large amount of brush filament tips and rotor.Frictional heat and coefficient of friction, brush filament
Tip force, rotor surface linear velocity are related, and reduce the means that brush wire bundle is worn with friction rotor at present and be mainly: selecting low rub
Wipe the brush wire bundle and rotor coating pairing material of coefficient, but its higher cost；Change the geomery of brush wire bundle to reduce tip
Power etc., but its functional effect is unobvious.
The resistance that streams of fluid is analyzed by Fluid Mechanics Computation (CFD), it is suffered around flow resistance that brush wire bundle is from upstream to downstream
Power gradually increases, it is possible to by changing the cross sectional shape and size of downstream brush filament, increase the pressure-bearing property of brush seal
Energy.According to theory, under the premise of saving material cost, elliptic cross-section can effectively improve the moment of inertia, by same load
In the case where, deformation deflection is small, can reduce leakage and hesitation caused by brush filament bending deformation.
Summary of the invention
The object of the present invention is to provide it is a kind of can unitary rotation the high pressure-bearing brush seal of low abrasion, it is existing brush to solve
The problems such as brush filament end and rotor abrasion are big in sealing, brush seal bearing capacity is low.
The present invention is realized by following technical scheme: it is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal, including
Bearing 1, brush filament ring 8；8 outer ring of brush filament ring interference fit is mounted on 1 inner ring of bearing, brush filament ring 8 include: front apron 2, rear baffle 3,
Upstream brush wire bundle 5, downstream brush wire bundle 6；Front apron 2 is located at 5 front of upstream brush wire bundle, after rear baffle 3 is located at downstream brush wire bundle 6
Portion, front apron 2, rear baffle 3 and upstream brush wire bundle 5,6 root of downstream brush wire bundle form fusion welded zone 4, upstream brush by welding process
Tow 5, downstream brush wire bundle 6 are fixed between front apron 2, rear baffle 3 by fusion welded zone 4, the upstream brush wire bundle 5 of brush filament ring 8,
Brush wire bundle 6 end in downstream is placed on the rotor 7 of machine by friction, the diameter of upstream brush wire bundle 5 and downstream brush wire bundle 6, shape
Shape is different, and the brush filament section of upstream brush wire bundle 5 is circle, and diameter is 0.07mm ~ 0.15mm, the brush filament section of downstream brush wire bundle 6
For ellipse, oval short axle is 0.07mm ~ 0.15mm, and oval long axis is 0.15mm ~ 0.3mm, oval long axis
Along the axial direction of rotor 7, the upstream region axial width that upstream brush wire bundle 5 is formed is greater than under the formation of downstream brush wire bundle 6
Swim region axial width.
The bearing 1 is the rolling bearing that can bear radial force and axial force.
It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal working principle are as follows: the 8 outer ring interference of brush filament ring is matched
Conjunction is mounted on 1 inner ring of bearing, and upstream brush wire bundle 5,6 root of downstream brush wire bundle are fixed on front apron 2, rear gear by fusion welded zone 4
Between plate 3, brush filament ring 8 is constituted；Upstream brush wire bundle 5,6 end of downstream brush wire bundle are contacted with the rotor 7 of machine；When machine operation turns
When son 7 rotates, rotor 7 contact generation frictional force with brush wire bundle end, to the generation torque of brush filament ring 8, due to the effect of bearing 1,
Brush filament ring 8 can follow rotor 7 to rotate, and the reduction of 7 surface of rotor and brush wire bundle end relative velocity can effectively reduce friction；
When gas is successively by upstream brush wire bundle 5 and downstream brush wire bundle 6, gas is reduced pressure difference by the blocking of brush filament, realizes sealing effect
Fruit, and brush filament is generated bending deformation by air-flow power, fluid winding flow resistance suffered by downstream brush wire bundle 6 is big, due to downstream brush filament
Oval brush filament structure, bending deformation designed by beam 6 can reduce.
The invention has the following advantages:
1, brush filament ring rotation can effectively reduce the fretting wear between brush wire bundle end and rotor, and the use of brush filament ring can be improved
In the service life, compared to other structures for reducing brush seal abrasion, effect is more preferable；
2, downstream brush filament can bearing capacity it is high, axial bending caused by can reducing brush filament after by resistance causes caused by gap
Leakage, while rigidifying effect and hesitation can be effectively reduced, and the cost of material is low；
3, structure is simple, easy to disassemble, is easily changed maintenance.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the sectional view along A-A of Fig. 1 of the present invention；
Fig. 3 is schematic view of the front view of the invention.
Each label in figure are as follows: 1: bearing, 2: front apron, 3: rear baffle, 4: fusion welded zone, 5: upstream brush wire bundle, 6: downstream brush
Tow, 7: rotor, 8: brush filament ring.
Specific embodiment
With reference to the accompanying drawings and examples, the invention will be further described, but the contents of the present invention be not limited to it is described
Range.
Embodiment 1: as shown in Figure 1-3, it is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal, including bearing 1,
Brush filament ring 8；8 outer ring of brush filament ring interference fit is mounted on 1 inner ring of bearing, and brush filament ring 8 includes: front apron 2, rear baffle 3, upstream brush
Tow 5, downstream brush wire bundle 7；Front apron 2 is located at 5 front of upstream brush wire bundle, and rear baffle 3 is located at 7 rear portion of downstream brush wire bundle, front
Plate 2, rear baffle 3 and upstream brush wire bundle 5,7 root of downstream brush wire bundle by welding process formation fusion welded zone 4, upstream brush wire bundle 5,
Downstream brush wire bundle 7 is fixed between front apron 2, rear baffle 3 by fusion welded zone 4, the upstream brush wire bundle 5 of brush filament ring 8, downstream brush
7 end of tow is placed on the rotor 7 of machine by friction, and upstream brush wire bundle 5 is different from the diameter of downstream brush wire bundle 7, shape,
The brush filament section of upstream brush wire bundle 5 is circle, and diameter 0.07mm, the brush filament section of downstream brush wire bundle 7 is ellipse, ellipse
Short axle be 0.07mm, oval long axis be 0.15mm, axial direction of the oval long axis along rotor 7, upstream brush filament
The upstream region axial width that beam 5 is formed is greater than the downstream area axial width that downstream brush wire bundle 7 is formed.
Bearing 1 is the rolling bearing that can bear radial force and axial force.
Embodiment 2: as shown in Figure 1-3, it is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal, including bearing 1,
Brush filament ring 8；8 outer ring of brush filament ring interference fit is mounted on 1 inner ring of bearing, and brush filament ring 8 includes: front apron 2, rear baffle 3, upstream brush
Tow 5, downstream brush wire bundle 7；Front apron 2 is located at 5 front of upstream brush wire bundle, and rear baffle 3 is located at 7 rear portion of downstream brush wire bundle, front
Plate 2, rear baffle 3 and upstream brush wire bundle 5,7 root of downstream brush wire bundle by welding process formation fusion welded zone 4, upstream brush wire bundle 5,
Downstream brush wire bundle 7 is fixed between front apron 2, rear baffle 3 by fusion welded zone 4, the upstream brush wire bundle 5 of brush filament ring 8, downstream brush
7 end of tow is placed on the rotor 7 of machine by friction, and upstream brush wire bundle 5 is different from the diameter of downstream brush wire bundle 7, shape,
The brush filament section of upstream brush wire bundle 5 is circle, and diameter is 0.07mm ~ 0.15mm, and the brush filament section of downstream brush wire bundle 7 is ellipse
Shape, oval short axle be 0.15mm, oval long axis be 0.3mm, oval long axis along rotor 7 axial direction,
The upstream region axial width that upstream brush wire bundle 5 is formed is greater than the downstream area axial width that downstream brush wire bundle 7 is formed.
Bearing 1 is angular contact ball bearing.
Embodiment 3: as shown in Figure 1-3, it is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal, including bearing 1,
Brush filament ring 8；8 outer ring of brush filament ring interference fit is mounted on 1 inner ring of bearing, and brush filament ring 8 includes: front apron 2, rear baffle 3, upstream brush
Tow 5, downstream brush wire bundle 7；Front apron 2 is located at 5 front of upstream brush wire bundle, and rear baffle 3 is located at 7 rear portion of downstream brush wire bundle, front
Plate 2, rear baffle 3 and upstream brush wire bundle 5,7 root of downstream brush wire bundle by welding process formation fusion welded zone 4, upstream brush wire bundle 5,
Downstream brush wire bundle 7 is fixed between front apron 2, rear baffle 3 by fusion welded zone 4, the upstream brush wire bundle 5 of brush filament ring 8, downstream brush
7 end of tow is placed on the rotor 7 of machine by friction, and upstream brush wire bundle 5 is different from the diameter of downstream brush wire bundle 7, shape,
The brush filament section of upstream brush wire bundle 5 is circle, and diameter 0.15mm, the brush filament section of downstream brush wire bundle 7 is ellipse, ellipse
Short axle be 0.15mm, oval long axis be 0.3mm, axial direction of the oval long axis along rotor 7, upstream brush wire bundle
The 5 upstream region axial widths formed are greater than the downstream area axial width that downstream brush wire bundle 7 is formed.
Bearing 1 is the rolling bearing that can bear radial force and axial force.
Claims (2)
1. one kind can unitary rotation the high pressure-bearing brush seal structure of low abrasion, it is characterised in that: including bearing (1), brush filament ring
(8)；Brush filament ring (8) outer ring interference fit is mounted on bearing (1) inner ring, brush filament ring (8) include: front apron (2), rear baffle (3),
Upstream brush wire bundle (5), downstream brush wire bundle (6)；Front apron (2) is located at upstream brush wire bundle (5) front, and rear baffle (3) is located at downstream
Brush wire bundle (6) rear portion, front apron (2), rear baffle (3) and upstream brush wire bundle (5), downstream brush wire bundle (6) root pass through melting welding work
Skill formed fusion welded zone (4), upstream brush wire bundle (5), downstream brush wire bundle (6) by fusion welded zone (4) be fixed on front apron (2), after
Between baffle (3), the upstream brush wire bundle (5) of brush filament ring (8), downstream brush wire bundle (6) end are placed in turn of machine by friction
On sub (7), upstream brush wire bundle (5) is different from the diameter of downstream brush wire bundle (6), shape, and the brush filament section of upstream brush wire bundle (5) is
Circle, diameter are 0.07mm ~ 0.15mm, and the brush filament section of downstream brush wire bundle (6) is ellipse, and oval short axle is 0.07mm
~ 0.15mm, oval long axis are 0.15mm ~ 0.3mm, axial direction of the oval long axis along rotor (7), upstream brush filament
The upstream region axial width that beam (5) is formed is greater than the downstream area axial width that downstream brush wire bundle (6) are formed.
2. it is according to claim 1 can unitary rotation the high pressure-bearing brush seal structure of low abrasion, it is characterised in that: it is described
Bearing (1) is the rolling bearing that can bear radial force and axial force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024504.1A CN108979741A (en) | 2018-09-04 | 2018-09-04 | It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024504.1A CN108979741A (en) | 2018-09-04 | 2018-09-04 | It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108979741A true CN108979741A (en) | 2018-12-11 |
Family
ID=64547675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811024504.1A Pending CN108979741A (en) | 2018-09-04 | 2018-09-04 | It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108979741A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749584A (en) * | 1992-11-19 | 1998-05-12 | General Electric Company | Combined brush seal and labyrinth seal segment for rotary machines |
| CN102900476A (en) * | 2012-09-21 | 2013-01-30 | 清华大学 | Low-leakage brush type sealing structure based on piezoelectric effect |
| CN205382960U (en) * | 2016-01-08 | 2016-07-13 | 沈阳航空航天大学 | Brush silk bundle has brush type sealing structure of low hysteretic behavior of high pressure -bearing |
| CN205714293U (en) * | 2016-06-21 | 2016-11-23 | 北京航空航天大学 | A kind of combination type brush seal structure |
| CN209212312U (en) * | 2018-09-04 | 2019-08-06 | 昆明理工大学 | It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal |
-
2018
- 2018-09-04 CN CN201811024504.1A patent/CN108979741A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749584A (en) * | 1992-11-19 | 1998-05-12 | General Electric Company | Combined brush seal and labyrinth seal segment for rotary machines |
| CN102900476A (en) * | 2012-09-21 | 2013-01-30 | 清华大学 | Low-leakage brush type sealing structure based on piezoelectric effect |
| CN205382960U (en) * | 2016-01-08 | 2016-07-13 | 沈阳航空航天大学 | Brush silk bundle has brush type sealing structure of low hysteretic behavior of high pressure -bearing |
| CN205714293U (en) * | 2016-06-21 | 2016-11-23 | 北京航空航天大学 | A kind of combination type brush seal structure |
| CN209212312U (en) * | 2018-09-04 | 2019-08-06 | 昆明理工大学 | It is a kind of can unitary rotation the high pressure-bearing of low abrasion brush seal |
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