CN205479337U - Backplate has brush type sealing structure of annular boss - Google Patents
Backplate has brush type sealing structure of annular boss Download PDFInfo
- Publication number
- CN205479337U CN205479337U CN201620017312.8U CN201620017312U CN205479337U CN 205479337 U CN205479337 U CN 205479337U CN 201620017312 U CN201620017312 U CN 201620017312U CN 205479337 U CN205479337 U CN 205479337U
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- China
- Prior art keywords
- annular boss
- brush
- backboard
- axial
- backplate
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Abstract
The utility model provides a backplate has brush type sealing structure of annular boss, includes fusion welding area, preceding baffle, brush silk bundle, backplate and annular boss. Preceding baffle and backplate pass through fusion welding area to be connected, and brush silk bundle root is fixed on fusion welding area, free end and rotor laminating. The setting of multiunit annular boss is at the internal surface of backplate, annular boss and the interior surface vertical of backplate. The utility model discloses simple structure, easily processing, the annular boss can effectively reduce the area of contact of brush silk and backplate, and then reduces brush silk and backplate frictional force within a definite time, can effectively reduce sealed stiffening effect and hysteresis, annular convex structure can locate radial flow with the backplate and introduce between the boss in the clearance, and fluid clearance between the boss forms strong swirl for the fluid energy dissipates in a large number, reduces radial flow, effective characteristic of obturaging of sealing up that improves.
Description
Technical field
This utility model relates to a kind of movable sealing structure being applied in rotating machinery, especially relates to
And a kind of backboard has the brush seal structure of annular boss.
Background technology
Brush seal is the critical component of the rotating machineries such as aero-engine, steam turbine, compressor.
Relative to traditional labyrinth seal, brush seal not only has preferable sealing characteristics, and is
A kind of flexible contact type dynamic sealing technology, it is possible to adapt to the moment radial deformation of rotor or eccentric fortune
Dynamic, additionally, the brush filament of brush seal forms flexible contact with armature spindle, rotor-support-foundation system can be improved
Vibration characteristics, it is ensured that the safety of unit operation, therefore brush seal be widely used in boat
In the rotating machinery of the industry fields such as empty space flight, electric power, petrochemical industry.
Brush seal is by front apron, backboard and is installed in compact arranged brush filament between the two
Shu Zucheng, brush seal rely on above-mentioned marshalling, close brush filament and rotor be affixed incompatible every
Disconnected gas downstream the leakage to upstream gas cause obstruction thus reach the effect sealed, its stream
Field characteristic is as follows with sealing mechanism: in brush wire bundle, brush filament gap is uneven, and inhomogeneities makes
Obtain to flow uniformly in entrance brush wire bundle and just become uneven, and from intensive brush wire bundle region
To loose brush wire bundle region bias current, these bias currents gradually form concurrent between brush filament and penetrate
Stream, and produce random Secondary Flow and bumpy flow, the flow field in annular seal space becomes extremely complex.
When jet runs into brush wire bundle the most closely, the direction of motion will be changed and become and main flow side
To vertical horizontal stream, just guarantee the inhomogeneities of flowing owing to brush wire bundle destroys flowing, make
Fluid creates self sealss effect, and horizontal mobility is effectively promoted the generation of self sealss effect, makes
The overall presure drop of brush wire bundle of flowing over increases thus reduces the leakage of sealing.
Research shows, brush being sealed in of tradition is made by the higher gas differential pressure of brush wire bundle upstream and downstream
Under with, brush filament generation axial bending is close to backboard, the friction mechanical resistance between brush filament and backboard
Hinder brush filament to deform in time, thus brush filament can not follow raising speed or the increasing of whirling motion bias of rotor in time
Wait greatly kinestate to deform, brush filament rigidifying effect occurs.Rigidifying effect can cause brush filament and
The accelerated wear test of rotor runway, reduces the sealing property of brush seal, reduction of service life.Separately
Outer along with rotor reduction of speed or when returning to less whirling motion eccentric position, between brush filament and backboard
Frictional force hinder again brush filament not restore immediately, brush filament occur hang, the delayed effect of brush filament occurs
Should.Rigidifying effect and hysteresis effect can accelerate the abrasion of brush filament and rotor surface, reduce brush close
The sealing property of envelope, increases quantity of gas leakage, reduction of service life.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art,
Propose a kind of backboard and there is the brush seal structure of annular boss.
For achieving the above object, the technical solution adopted in the utility model is: a kind of backboard
There is the brush seal structure of annular boss, including fusion welded zone, front apron, brush wire bundle, after
Baffle plate and annular boss.Front apron and backboard are connected by fusion welded zone, and brush wire bundle root is solid
Being scheduled on fusion welded zone, free end is fitted with rotor.Annular boss is arranged on the interior table of backboard
Face, and vertical with backboard inner surface.
Preferably, described annular boss is seen as rectangle, described ring in rotor axial-sagittal plane
Shape boss is vertical with backboard inner surface, brush wire bundle end row brush silk and the axial gap of backboard
Being 0～0.5mm, the axial height of annular boss is 0.5～1 times of axial gap, and
Each annular boss axial height is equal, between adjacent annular boss spacing w be 3mm～
6mm, and be equidistant, each annular boss radial thickness l is 2mm～4mm,
Backboard inner surface radial direction arranges 3～5 annular boss.
Preferably, described annular boss is seen as triangle in rotor axial-sagittal plane, described
Annular boss is vertical with backboard inner surface, between the axial direction of brush wire bundle end row brush silk and backboard
Gap is 0～0.5mm, and the axial height of annular boss is 0.5～1 times of axial gap, and
And each annular boss axial height is equal, between adjacent annular boss spacing w be 3mm～
6mm, and be equidistant, each annular boss radial thickness l is 2mm～4mm,
Backboard inner surface radial direction arranges 3～5 annular boss.
Preferably, described annular boss is seen as the upstream length of side in rotor axial-sagittal plane and is less than
The polygon of the downstream length of side, described annular boss is vertical with backboard inner surface, brush wire bundle end
Row brush silk is 0～0.5mm with the axial gap of backboard, and the axial height of annular boss is axle
To the 0.5～1 of gap times, and each annular boss axial height is equal, and adjacent annular is convex
Between platform, spacing w is 3mm～6mm, and is equidistant, and each annular boss is the thickest
Degree l is 2mm～4mm, arranges 3～5 annular boss at backboard inner surface radial direction.
Preferably, described brush wire bundle root is fixed by welding process, and is clamped in front
Fusion welded zone is formed between plate and backboard；Described brush filament typically use diameter 0.05mm～
The Ni-based high-temperature alloy silk of 0.15mm, a length of 25mm～40mm of brush filament, brush wire bundle
Axially gross thickness 5mm～20mm, brush filament and rotor radial are 30～60 ° of established angles, install
Angle is along rotor direction of rotation.
Preferably, described brush seal backboard height is 0.75～0.95 times of brush filament length,
Front apron height is 0.45～0.75 times of brush filament length, front and rear baffle thickness be 3mm～
4.5mm, the radial distance i.e. backboard protection height of backboard and rotor be 1.5mm～
3.5mm。
The utility model proposes a kind of backboard and there is the brush seal structure of annular boss,
Its major advantage is as follows:
1, simple in construction, does not change the basic structure composition of tradition brush seal, only in tradition
Brush seal backboard inner surface radial direction is uniformly arranged the annular boss that many groups are the most contour；
2, arrange at backboard inner surface radial direction and organize annular boss, when brush filament is due to High Pressure Difference more
Axial bending when being close to backboard, annular boss is occurred effectively to reduce connecing of brush filament and backboard
Touch, and then reduce frictional force between brush filament and backboard, can effectively reduce the rigidifying effect of sealing
And hysteresis effect；
3, backboard can be introduced adjacent with Radial Flow in brush wire bundle gap by annular boss structure
In the gap of boss, fluid forms stronger whirlpool in adjacent lands gap so that fluid energy
A large amount of dissipation, are effectively improved the sealing characteristics of sealing.
Accompanying drawing explanation
Fig. 1 (a) is the structural representation of this utility model embodiment 1.
Fig. 1 (b) is the structure partial enlarged drawing of this utility model embodiment 1.
The A-A of Fig. 1 (c) Fig. 1 (a) is to sectional view.
Fig. 2 (a) is the structural representation of this utility model embodiment 2.
Fig. 2 (b) is the structure partial enlarged drawing of this utility model embodiment 2.
The B-B of Fig. 2 (c) Fig. 2 (a) is to sectional view.
In figure, 1 is fusion welded zone, and 2 is front apron, and 3 is backboard, and 4 is brush wire bundle, 5
For annular boss, 6 is rotor.
Detailed description of the invention:
Embodiment 1
As shown in Fig. 1 (a)-Fig. 1 (c): a kind of backboard has the brush close of annular boss
Seal structure, including fusion welded zone 1, front apron 2, backboard 3, brush wire bundle 4, annular boss 5,
Rotor 6.Described brush wire bundle 4 root is fixed by welding process, and is clamped in front apron 2
And between backboard 3, form fusion welded zone 1；Described annular boss 5 is by welding process and backstop
Plate 3 welds together, and described annular boss 5 is seen as rectangle in rotor axial-sagittal plane,
Some annular boss 5 are radially at backboard 3 inner surface radial direction arranged distribution, annular boss 5
Vertical with backboard 3 surface, the axial gap of brush wire bundle 4 end row brush silk and backboard be 0～
0.5mm, the axial height of annular boss 5 is backboard 3 and brush wire bundle 4 end row brush silk axle
To the 0.5～1 of gap times, adjacent annular boss 5 spacing w is 3mm～6mm, rear
Baffle plate 3 inner surface radial direction 3～5 annular boss 5 of design, annular boss 5 thickness L is
2mm～4mm.
Embodiment 2
As shown in Fig. 2 (a)-Fig. 2 (c): a kind of backboard has the brush close of annular boss
Seal structure, including fusion welded zone 1, front apron 2, backboard 3, brush wire bundle 4, annular boss 5,
Rotor 6.Described brush wire bundle 4 root is fixed by welding process, and is clamped in front apron 2
And between backboard 3, form fusion welded zone 1；Described annular boss 5 is by welding process and backstop
Plate 3 welds together, and described annular boss 5 is seen as triangle in rotor axial-sagittal plane,
Some annular boss 5 are radially at backboard 3 inner surface radial direction arranged distribution, annular boss 5
Vertical with backboard 3 surface, the axial gap of brush wire bundle 4 end row brush silk and backboard be 0～
0.5mm, the axial height of annular boss 5 is backboard 3 and brush wire bundle 4 end row brush silk axle
To the 0.5～1 of gap times, adjacent annular boss 5 spacing w is 3mm～6mm, rear
Baffle plate 3 inner surface radial direction 3～5 annular boss 5 of design, annular boss 5 thickness L is
2mm～4mm.
Compared with tradition brush seal, occur the most curved when brush wire bundle due to axial flow effect
Bent and when being close to backboard, annular boss can reduce the contact area of brush wire bundle and backboard,
Effectively reduce the frictional force between brush wire bundle and backboard, and then reduce brush filament appearance suspension and produce
Raw rigidifying effect and hysteresis effect；And Radial Flow at backboard can be drawn by annular boss structure
Entering between boss in gap, fluid gap between boss forms stronger whirlpool so that fluid energy
Amount is a large amount of to dissipate, and reduces the Radial Flow of fluid, is effectively improved the sealing characteristics of sealing.
Claims (6)
1. backboard has a brush seal structure for annular boss, including fusion welded zone, front apron,
Brush wire bundle, backboard and annular boss；Front apron and backboard are connected by fusion welded zone, brush wire bundle root
Portion is fixed on fusion welded zone, and free end is fitted with rotor, and many group annular boss are arranged on the interior of backboard
Surface, annular boss is vertical with backboard inner surface.
A kind of backboard the most as claimed in claim 1 has the brush seal structure of annular boss,
It is characterized in that: described annular boss is seen as rectangle, described convex annular in rotor axial-sagittal plane
Platform is vertical with backboard inner surface, the axial gap of brush wire bundle end row brush silk and backboard be 0～
0.5mm, the axial height of annular boss is 0.5～1 times of axial gap, and each convex annular
Platform axial height is equal, and between adjacent annular boss, spacing w is 3mm～6mm, and between being etc.
Away from, each annular boss radial thickness l is 2mm～4mm, backboard inner surface radial direction arrange 3～
5 annular boss.
A kind of backboard the most as claimed in claim 1 has the brush seal structure of annular boss,
It is characterized in that: described annular boss is seen as triangle, described annular in rotor axial-sagittal plane
Boss is vertical with backboard inner surface, the axial gap of brush wire bundle end row brush silk and backboard be 0～
0.5mm, the axial height of annular boss is 0.5～1 times of axial gap, and each convex annular
Platform axial height is equal, and between adjacent annular boss, spacing w is 3mm～6mm, and between being etc.
Away from, each annular boss radial thickness l is 2mm～4mm, backboard inner surface radial direction arrange 3～
5 annular boss.
A kind of backboard the most as claimed in claim 1 has the brush seal structure of annular boss,
It is characterized in that: described annular boss is seen as the upstream length of side less than downstream in rotor axial-sagittal plane
The polygon of the length of side, described annular boss is vertical with backboard inner surface, brush wire bundle end row brush silk with after
The axial gap of baffle plate is 0～0.5mm, and the axial height of annular boss is the 0.5～1 of axial gap
Times, and each annular boss axial height is equal, between adjacent annular boss spacing w be 3mm～
6mm, and be equidistant, each annular boss radial thickness l is 2mm～4mm, in backstop
Plate inner surface radial direction arranges 3～5 annular boss.
A kind of backboard the most as claimed in claim 1 has the brush seal structure of annular boss,
It is characterized in that: described brush wire bundle root is fixed by welding process, and be clamped in front apron and after
Fusion welded zone is formed between baffle plate；The brush filament of described brush wire bundle uses diameter 0.05mm's～0.15mm
Ni-based high-temperature alloy silk, a length of 25mm～40mm of brush filament, axial gross thickness 5mm of brush wire bundle～
20mm, brush filament and rotor radial are 30～60 ° of established angles, and established angle is along rotor direction of rotation.
A kind of backboard the most as claimed in claim 3 has the brush seal structure of annular boss,
It is characterized in that: described backboard height is 0.75～0.95 times of brush filament length, and front apron height is
0.45～0.75 times of brush filament length, front and rear baffle thickness is 3mm～4.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620017312.8U CN205479337U (en) | 2016-01-08 | 2016-01-08 | Backplate has brush type sealing structure of annular boss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620017312.8U CN205479337U (en) | 2016-01-08 | 2016-01-08 | Backplate has brush type sealing structure of annular boss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205479337U true CN205479337U (en) | 2016-08-17 |
Family
ID=56665556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620017312.8U Expired - Fee Related CN205479337U (en) | 2016-01-08 | 2016-01-08 | Backplate has brush type sealing structure of annular boss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205479337U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401427A (en) * | 2017-08-07 | 2017-11-28 | 昆明理工大学 | A kind of low sluggish combination brush seal of adjustable contact gap |
| CN107630721A (en) * | 2017-10-12 | 2018-01-26 | 昆明理工大学 | A kind of spliced brush seal of circumference in equal parts |
| CN107939974A (en) * | 2017-11-28 | 2018-04-20 | 沈阳航空航天大学 | A kind of adjustable magnetic damping presses down the brush seal structure that quivers |
| CN109356672A (en) * | 2018-11-08 | 2019-02-19 | 北京北冶功能材料有限公司 | A kind of sealing structure improving brush filament sealing effect |
-
2016
- 2016-01-08 CN CN201620017312.8U patent/CN205479337U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401427A (en) * | 2017-08-07 | 2017-11-28 | 昆明理工大学 | A kind of low sluggish combination brush seal of adjustable contact gap |
| CN107630721A (en) * | 2017-10-12 | 2018-01-26 | 昆明理工大学 | A kind of spliced brush seal of circumference in equal parts |
| CN107630721B (en) * | 2017-10-12 | 2023-10-03 | 昆明理工大学 | Equal-split circumference spliced brush type seal |
| CN107939974A (en) * | 2017-11-28 | 2018-04-20 | 沈阳航空航天大学 | A kind of adjustable magnetic damping presses down the brush seal structure that quivers |
| CN107939974B (en) * | 2017-11-28 | 2019-04-26 | 沈阳航空航天大学 | A kind of adjustable magnetic damping suppression is quivered brush seal structure |
| CN109356672A (en) * | 2018-11-08 | 2019-02-19 | 北京北冶功能材料有限公司 | A kind of sealing structure improving brush filament sealing effect |
| CN109356672B (en) * | 2018-11-08 | 2023-09-12 | 北京北冶功能材料有限公司 | Sealing structure for improving sealing effect of brush wires |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20170108 |