CN110017179A - The brush seal structure of brush filament circumferential direction tilt adjustable - Google Patents
The brush seal structure of brush filament circumferential direction tilt adjustable Download PDFInfo
- Publication number
- CN110017179A CN110017179A CN201910310715.XA CN201910310715A CN110017179A CN 110017179 A CN110017179 A CN 110017179A CN 201910310715 A CN201910310715 A CN 201910310715A CN 110017179 A CN110017179 A CN 110017179A
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- China
- Prior art keywords
- brush
- wire bundle
- brush wire
- circumferential direction
- fixed pin
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- 239000007787 solid Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a kind of brush seal structures of brush filament circumferential direction tilt adjustable, it include: rear baffle, brush wire bundle element and front apron, wherein, one lateral edge of rear baffle its be provided at circumferentially spaced cylindrical fixed pin, brush wire bundle element is multiple, it is set in turn on the cylindrical fixed pin, each brush wire bundle element includes brush wire bundle and brush wire bundle fixing piece, the through-hole with cylindrical fixed pin cooperation is provided on brush wire bundle fixing piece, the top of brush wire bundle fixing piece is provided with external tooth wheel set, its circumferential direction of one lateral edge of front apron is provided with the internal gear pair with the cooperation of external tooth wheel set, when on the cylindrical fixed pin that brush wire bundle element is successively installed on rear baffle by through-hole, and after the internal gear pair of front apron is engaged with the external tooth wheel set of brush wire bundle element, by rotating front apron, brush wire bundle element can be driven to rotate around cylindrical fixed pin, in turn The adjusting to gap between brush wire bundle circumferential direction inclination angle and brush wire bundle and rotor is realized, to adapt to obturage needs under different operating conditions.
Description
Technical field
The present invention relates to turbomachinery rotary dynamic seal field, a kind of the brush of brush filament circumferential direction tilt adjustable is specifically provided
Sealing structure.
Background technique
In the design and use process of Steam Turbine and aero-engine, need to consider that obturaging between different parts is asked
Topic, good sealing characteristics have significant effect for improving unit efficiency, promoting overall power.Existing widely applied sealing
Type has the brush seal of contactless labyrinth seal and contact, wherein labyrinth seal application time is longer, and research is more
Maturation, but labyrinth seal can generate Airflow Exciting-Vibration Force to influence the stability of rotor, and brush seal is contact seal, due to
Its brush wire bundle flexible can beat with rotor and generate elastic yield, damage when avoiding traditional labyrinth seal and rotor collision
The problem of rotor, obturages effect better than labyrinth seal.
The brush wire bundle of existing brush seal structure is structure as a whole with front and rear baffle, in the mistake of brush seal structure work
Cheng Zhong can not adjust as needed the inclination angle of brush wire bundle, and then adjust it and obturage effect, however, actually using in brush seal
During, it may appear that the case where being not quite similar using requirement of the structure of brush seal under different operating conditions for sealing, example
Such as, steam turbine needs to cross critical speed on startup, is at this time the generation for avoiding covibration, needs brush seal and rotor
Between to obturage effect not significant, but in steam turbine normal course of operation, the good sealing characteristics of brush seal is needed to protect
The efficiency for demonstrate,proving steam turbine, due to taking off, is cruised, descent engine speed is not quite similar, and sends out in aero-engine
The power that motivation issues is also different, to make aero-engine be owned by ideal performance under all operating conditions, for obturaging effect
Requirement bigger difference is also had under different operating conditions, in this case, it is necessary to brush seal structure can outside control
The inclination angle of brush wire bundle is adjusted flexibly under the driving of system processed, obturages effect to change it, adapts to the requirement of different operating conditions.
Therefore, a kind of inclination angle that can adjust brush wire bundle under the action of external motivating force is developed, and then adjusts brush seal
The brush seal structure of seal clearance between rotor obtain it can under different operating conditions suitable for close under the operating condition
Envelope needs, and then the whole efficiency of steam turbine and aero-engine and power is made to get a promotion, and it is urgently to be resolved to become people
Problem.
Summary of the invention
In consideration of it, the purpose of the present invention is to provide a kind of brush seal structure of brush filament circumferential direction tilt adjustable, to solve
The circumferential inclination angle of brush wire bundle is immutable in existing brush seal structure, brush wire bundle of brush seal and rotor clearance cannot pass through
The problem of sealing that adjustment adapts to different operating conditions needs.
Present invention provide the technical scheme that a kind of brush seal structure of brush filament circumferential direction tilt adjustable, comprising: rear gear
Plate, brush wire bundle element and front apron, wherein a lateral edge of rear baffle its be provided at circumferentially spaced cylindrical fixed pin, brush wire bundle
Element be it is multiple, be set in turn on the cylindrical fixed pin, sealed for being realized to rotor, each brush wire bundle element wraps
Brush wire bundle and brush wire bundle fixing piece are included, the through-hole with the cylindrical fixed pin cooperation, brush filament are provided on brush wire bundle fixing piece
The top of beam fixing piece is provided with external tooth wheel set, its circumferential direction of a lateral edge of front apron be provided with in external tooth wheel set cooperation
Gear pair, on the cylindrical fixed pin that brush wire bundle element is successively installed on rear baffle by through-hole, and the internal gear of front apron
After pair is engaged with the external tooth wheel set of brush wire bundle element, by rotating front apron, brush wire bundle element can be driven around cylindrical fixed pin
Rotation, and then realize the adjusting to gap between brush wire bundle circumferential direction inclination angle and brush wire bundle and rotor.
It is preferred that cylindrical fixed pin is uniformly distributed along the circumferential direction of rear baffle.
It further preferably, is 80 along the quantity of the uniformly distributed cylindrical fixed pin of the circumferential direction of rear baffle.
Further preferably, the diameter and thickness of the through-hole on brush wire bundle fixing piece and cylindrical fixed pin are all the same.
Further preferably, the angular range that brush wire bundle element can be rotated around cylindrical fixed pin is 0-60 °.
Further preferably, the radially adjustable altitude range of brush wire bundle element is 0-2.5mm.
Further preferably, brush wire bundle with a thickness of 1.5-2.0mm.
The brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention, structure is simple, and not changing, tradition is brush
On the basis of sealing basic structure composition, replacement installation easy to disassemble, installation steps are clear, are easy to control；Relative to conventional brush
The brush seal structure of formula sealing structure, brush filament circumferential direction tilt adjustable provided by the invention can adjust brush wire bundle under external force control
Circumferential inclination angle, and then change brush wire bundle and rotor surface radial clearance so that ground steam turbine or aero-engine be not
With required seal performance, and then the whole service performance of promotion unit is obtained under operating condition, improve the leakage characteristics of turbomachinery；
The brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention in such a way that the installation of independent element is fixed,
Progress entirety is not needed when independent part failure and scraps replacement, only need to individually be replaced, and is reduced due to local damage to whole brush
Seal service performance and the influence in service life；Part be can a large amount of duplications of production batch part, enormously simplify manufacturing cost,
Easy to disassemble, replacement and maintenance reduce use and maintenance cost；Reduce traditional brush seal to need front apron, it is rear to keep off
Plate, the processing step that brush wire bundle welds together are conducive to rapid, high volume and produce, reduce brush seal use cost.
Detailed description of the invention
With reference to the accompanying drawing and embodiment the present invention is described in further detail:
Fig. 1 is the fractionation schematic diagram of the brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention；
Fig. 2 is the assembling schematic diagram of the brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention；
Fig. 3 is the structural schematic diagram of the rear baffle of the brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention；
Fig. 4 is the structural representation of the brush wire bundle element of the brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention
Figure；
Fig. 5 is the radial signal of the brush wire bundle element of the brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention
Figure；
Fig. 6 is the structural schematic diagram of the front apron of the brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention；
Fig. 7 is the brush wire bundle element and rear baffle of the brush seal structure of brush filament circumferential direction tilt adjustable provided by the invention
Assembling schematic diagram.
Specific embodiment
The present invention is further explained below in conjunction with specific embodiment, but the not limitation present invention.
As shown in Figures 1 to 7, the present invention provides a kind of brush seal structures of brush filament circumferential direction tilt adjustable, comprising: after
Baffle 1, brush wire bundle element 2 and front apron 3, wherein a lateral edge of rear baffle 1 its be provided at circumferentially spaced cylindrical fixed pin
11, brush wire bundle element 2 be it is multiple, be set in turn on the cylindrical fixed pin 11, sealed for being realized to rotor, each brush
Tow element 2 includes brush wire bundle 21 and brush wire bundle fixing piece 22, is provided on brush wire bundle fixing piece 22 solid with the cylinder
The through-hole 221 that rationed marketing 11 cooperates, the top of brush wire bundle fixing piece 22 is provided with external tooth wheel set 222, its week of lateral edge for front apron 3
To the internal gear pair 31 cooperated with the external tooth wheel set 222 is provided with, when brush wire bundle element 2 is successively installed on by through-hole 221
On the cylindrical fixed pin 11 of rear baffle 1, and the internal gear pair 31 of front apron 3 is engaged with the external tooth wheel set 222 of brush wire bundle element 2
Afterwards, by rotating front apron 3, brush wire bundle element 2 can be driven to rotate around cylindrical fixed pin 11, and then realize to brush wire bundle 21 weeks
Adjusting to gap between inclination angle and brush wire bundle 21 and rotor.
The installation method of the brush seal structure of the brush filament circumferential direction tilt adjustable is as follows: rear baffle fixed setting is working
It remains stationary in the process, brush wire bundle element is successively installed on the cylindrical fixed pin of rear baffle by through-hole, for rotor
Sealing, front apron is correspondingly arranged with rear baffle and internal gear pair thereon is engaged with the external tooth wheel set of brush wire bundle element, front apron
It can be circumferentially rotated under the control of external control system, it, can be in front in order to improve the visual and quantitative of rotational angle
Scale is divided on the outside of plate.
The working principle of the brush seal structure of the brush filament circumferential direction tilt adjustable is as follows: the brush seal structure is working
When, axial high pressure draught passes through front apron first, then passes through brush wire bundle element, finally passes through rear baffle, when unit is in not
It when with operating condition, is also not quite similar to the requirement of sealing, when needing to change sealing effect, external control system rotates front
Plate makes its rotation, and due to the engagement of gear pair, brush wire bundle element will be rotated around cylindrical fixed pin therewith, and then can be changed
Become the circumferential inclination angle of brush wire bundle, while the gap between changeable brush wire bundle free end and rotor, reaches and adapt under different operating conditions
Obturage the purpose of effect.
As the improvement of technical solution, as shown in Fig. 3, Fig. 7, circumferential direction uniform cloth of the cylindrical fixed pin 11 along rear baffle 1
If quantity is preferably 80, at this point, corresponding brush wire bundle element is also 80.
As the improvement of technical solution, the diameter of through-hole 221 and cylindrical fixed pin 11 on brush wire bundle fixing piece 22 and
Thickness is all the same.
As the improvement of technical solution, the angular range that brush wire bundle element 2 can be rotated around cylindrical fixed pin 11 is 0-
60°。
As the improvement of technical solution, the radially adjustable altitude range of brush wire bundle element 2 is
0-2.5mm。
As the improvement of technical solution, brush wire bundle 21 with a thickness of 1.5-2.0mm.
A specific embodiment of the invention is write according to progressive mode, and each embodiment is highlighted
Difference, similar portion can be with cross-reference.
Embodiments of the present invention are elaborated above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (7)
1. the brush seal structure of brush filament circumferential direction tilt adjustable characterized by comprising rear baffle (1), brush wire bundle element (2)
With front apron (3), wherein a lateral edge of rear baffle (1) its be provided at circumferentially spaced cylindrical fixed pin (11), brush wire bundle element
(2) it to be multiple, are set in turn on the cylindrical fixed pin (11), sealed for being realized to rotor, each brush wire bundle element
(2) include brush wire bundle (21) and brush wire bundle fixing piece (22), be provided on brush wire bundle fixing piece (22) solid with the cylinder
The through-hole (221) of rationed marketing (11) cooperation, the top of brush wire bundle fixing piece (22) are provided with external tooth wheel set (222), front apron (3)
Its circumferential direction of one lateral edge is provided with the internal gear pair (31) with the external tooth wheel set (222) cooperation, when brush wire bundle element (2) are by leading to
Hole (221) is successively installed on the cylindrical fixed pin (11) of rear baffle (1), and the internal gear pair (31) of front apron (3) and brush
After external tooth wheel set (222) engagement of tow element (2), by rotating front apron (3), brush wire bundle element (2) can be driven around cylinder
Shape fixed pin (11) rotation, and then realize the tune to gap between the circumferential inclination angle of brush wire bundle (21) and brush wire bundle (21) and rotor
Section.
2. according to the brush seal structure of brush filament circumferential direction tilt adjustable described in claim 1, it is characterised in that: cylindrical fixed pin
(11) circumferential direction along rear baffle (1) is uniformly distributed.
3. according to the brush seal structure of brush filament circumferential direction tilt adjustable described in claim 2, it is characterised in that: along rear baffle (1)
The quantity of the uniformly distributed cylindrical fixed pin of circumferential direction be 80.
4. according to the brush seal structure of brush filament circumferential direction tilt adjustable described in claim 1, it is characterised in that: brush wire bundle fixing piece
(22) through-hole (221) and the diameter and thickness of cylinder fixed pin (11) on are all the same.
5. according to the brush seal structure of brush filament circumferential direction tilt adjustable described in claim 1, it is characterised in that: brush wire bundle element
(2) angular range that can be rotated around cylindrical fixed pin (11) is 0-60 °.
6. according to the brush seal structure of brush filament circumferential direction tilt adjustable described in claim 1, it is characterised in that: brush wire bundle element
(2) radially adjustable altitude range is 0-2.5mm.
7. according to the brush seal structure of brush filament circumferential direction tilt adjustable described in any one of claims 1 to 6, it is characterised in that:
Brush wire bundle (21) with a thickness of 1.5-2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310715.XA CN110017179B (en) | 2019-04-18 | 2019-04-18 | Brush type sealing structure with adjustable circumferential inclination angle of brush wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310715.XA CN110017179B (en) | 2019-04-18 | 2019-04-18 | Brush type sealing structure with adjustable circumferential inclination angle of brush wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110017179A true CN110017179A (en) | 2019-07-16 |
| CN110017179B CN110017179B (en) | 2024-01-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910310715.XA Active CN110017179B (en) | 2019-04-18 | 2019-04-18 | Brush type sealing structure with adjustable circumferential inclination angle of brush wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110017179B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863867A (en) * | 2019-11-25 | 2020-03-06 | 沈阳航空航天大学 | Two-stage brush type sealing structure capable of actively controlling height of rear baffle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0816726A1 (en) * | 1996-06-28 | 1998-01-07 | General Electric Company | Brush seals and combined labyrinth and brush seals for rotary machines |
| JP2001050396A (en) * | 1999-08-05 | 2001-02-23 | Toshiba Corp | Brush sealing 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 |
| CN109555564A (en) * | 2019-01-25 | 2019-04-02 | 沈阳航空航天大学 | The brush seal structure of brush wire bundle Yu rotor cover radial clearance is adjusted containing magnet |
| EP3550184A1 (en) * | 2018-04-05 | 2019-10-09 | United Technologies Corporation | Multi-plane brush seal |
| CN209990508U (en) * | 2019-04-18 | 2020-01-24 | 沈阳航空航天大学 | Brush type sealing structure with brush wire with adjustable circumferential inclination angle |
-
2019
- 2019-04-18 CN CN201910310715.XA patent/CN110017179B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0816726A1 (en) * | 1996-06-28 | 1998-01-07 | General Electric Company | Brush seals and combined labyrinth and brush seals for rotary machines |
| JP2001050396A (en) * | 1999-08-05 | 2001-02-23 | Toshiba Corp | Brush sealing device |
| EP3550184A1 (en) * | 2018-04-05 | 2019-10-09 | United Technologies Corporation | Multi-plane brush seal |
| 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 |
| CN109555564A (en) * | 2019-01-25 | 2019-04-02 | 沈阳航空航天大学 | The brush seal structure of brush wire bundle Yu rotor cover radial clearance is adjusted containing magnet |
| CN209990508U (en) * | 2019-04-18 | 2020-01-24 | 沈阳航空航天大学 | Brush type sealing structure with brush wire with adjustable circumferential inclination angle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863867A (en) * | 2019-11-25 | 2020-03-06 | 沈阳航空航天大学 | Two-stage brush type sealing structure capable of actively controlling height of rear baffle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110017179B (en) | 2024-01-02 |
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