CN203499823U - Brush type sealing device - Google Patents
Brush type sealing device Download PDFInfo
- Publication number
- CN203499823U CN203499823U CN201320557193.1U CN201320557193U CN203499823U CN 203499823 U CN203499823 U CN 203499823U CN 201320557193 U CN201320557193 U CN 201320557193U CN 203499823 U CN203499823 U CN 203499823U
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- Prior art keywords
- brush
- rotor
- tow
- cover plate
- seal installation
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- Expired - Lifetime
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model provides a brush type sealing device for air-tight seal of a rotor. The device comprises a front baffle which is sleeved on the rotor. The device further comprises a brush bundle which is sleeved on the rotor and assembled inside the front baffle. The device further comprises a rear baffle which is sleeved on the rotor and assembled inside the brush bundle. An inwardly concave decompression groove is formed in a pressure-bearing face of the rear baffle contacted with the brush bundle. When the rotor deviates radially, the brush bundle on the deviated side enters into the decompression groove under the effect of a high pressure air flow without contacting with the pressure-bearing face of the rear baffle, thereby slowing down the rigidization effect of the brush bundle, improving the sealing performance of the rotor by the brush bundle, and prolonging the service life of the brush bundle. On the other hand, a high speed air flow passes through the brush bundle and enters into the decompression groove to form a relatively balanced pressure region on each side of the brush bundle so as to reduce the retardation effect of the brush, so that the deviated brush is quick to recover, and the brush suspension phenomenon is alleviated.
Description
Technical field
The utility model relates to seal arrangement field, especially, relates to a kind of brush seal installation.
Background technique
Development along with aeroengine, there is a kind of new gas sealing mechanism, brush seal installation, because brush seal installation released gas rate is low and sealability stable, what become comb tooth sealing the most simply, the most effectively replaces product, in the stream sealing of aeroengine, is promoted widely and uses.
At present, at some key sealing positions of the internal cooling air system of aeroengine, or even blower outlet is to the high pressure in turbine inlet district, some sealing positions of high-temperature area, has used brush seal installation to replace traditional comb tooth sealing.Although brush seal installation is compared traditional comb tooth seal arrangement and had advantages of necessarily in hermetic seal field, shows in the use of brush seal installation, also there is certain defect in brush seal installation when rotor is carried out to hermetic seal.
Due to brush silk and rotor interference fit, when there is radial deflection due to centrifugal or thermal expansion in rotor, to the brush tow that be offset side be moved to backboard lateral deviation, under the effect of pressure and frictional force, will there is firmization effect in brush silk, and the brush silk of brushing in tow is no longer single brush silk, but " condensing " becomes piece, this firmization effect of brush tow will make contact force between brush silk point and rotor increase, thereby accelerate the wearing and tearing of brush silk and rotor, reduce sealing characteristics and the working life of brushing tow; On the other hand, after the brush tow of skew side moves to backboard lateral deviation, there is hesitation owing to having elasticity in brush tow, can not restore immediately, thereby occur brushing the phenomenon that silk hangs, thereby further the sealability of tow to rotor brushed in impact after skew.
Model utility content
The utility model aim to provide a kind ofly reduce contact force between brush silk point and rotor, reduce wearing and tearing between brush silk and rotor, improve brush tow to the working life of the sealability of rotor and brush tow, slow down brush silk and be subject to the degree of air pressure skew and the brush seal installation that the brush silk after skew can restore rapidly, with solve the brush silk point that existing brush seal installation exists and the contact force between rotor is large, wearing and tearing between brush silk and rotor are large, the sealing characteristics of brush tow and working life is low and skew after the technical problem that can not restore immediately of brush silk.
For achieving the above object, the utility model provides a kind of brush seal installation, for rotor is carried out to hermetic seal, comprising: front screen, is sheathed on rotor; Brush tow, is sheathed on rotor and is installed in the inner side of front screen; Backboard, is sheathed on rotor and is installed in the inner side of brushing tow, offers the decompressing groove of indent with brush tow on the pressure-bearing surface contacting of backboard.
Further, decompressing groove is annular groove, is opened in the center of the pressure-bearing surface of backboard.
Further, front screen is that material is the front screen of GH4169; Backboard is that material is the backboard of GH4169; Brush tow is that material is the brush tow of GH4137.
Further, brush tow and front screen weld by electron beam welding, and brush tow and backboard weld by electron beam welding.
Further, device also comprises: aft cover plate, is sheathed on rotor and is installed in front screen and brushes between tow.
Further, aft cover plate is structure in the form of a ring, offers many airslides that extend towards its outer ring surface on its inner ring surface, and airslide connects in two surperficial directions of vertical aft cover plate.
Further, airslide is 8mm along the length of aft cover plate radial direction, and airslide is 0.2mm along the width of aft cover plate contour direction.
Further, many airslides are distributed on aft cover plate along the contour direction of aft cover plate.
Further, aft cover plate is that material is the aft cover plate of GH4169.
Further, aft cover plate is fixed by electron beam welding and front screen.
The utlity model has following beneficial effect:
According to brush seal installation of the present utility model, when there is radial deflection in rotor, under the effect of high pressure draught, on pressure-bearing surface due to backboard, offer the decompressing groove of indent, therefore be offset the brush tow of side, will enter in decompressing groove, and not contact with the pressure-bearing surface of backboard, thereby slow down the firmization effect of brush tow, contact force between brush silk point and rotor is reduced, and the wearing and tearing between brush silk and rotor reduce, the final raising working life of brush tow to the sealability of rotor and brush tow;
On the other hand, when high velocity air enters seal arrangement by front screen, high velocity air will enter in decompressing groove after brushing tow, thereby in the both sides of brush tow, form the baric area of a relative equilibrium, reduce brush silk hesitation, brush silk after skew is restored rapidly, thereby alleviate the phenomenon that brush silk hangs, improve the sealability of brush tow.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the main TV structure schematic diagram according to brush seal installation of the present utility model;
Fig. 2 is that A-A in Fig. 1 is to broken section structural representation;
Fig. 3 is the main TV structure schematic diagram of the aft cover plate in Fig. 1; And
Fig. 4 is the local structure for amplifying schematic diagram at the I place in Fig. 3.
Marginal data
1, front screen; 2, brush tow; 3, backboard; 31, decompressing groove; 4, aft cover plate; 41, airslide.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As depicted in figs. 1 and 2, a kind of brush seal installation of the present utility model, for rotor is carried out to hermetic seal, this device comprises front screen 1, front screen 1 is sheathed on rotor; Device also comprises brush tow 2, and brush tow 2 is sheathed on rotor and is installed in the inner side of front screen 1; Device also comprises that backboard 3, backboard 3 are sheathed on rotor and are installed in the inner side of brushing tow 2, offers the decompressing groove 31 of indent with brush tow 2 on the pressure-bearing surface contacting of backboard 3.According to brush seal installation of the present utility model, during work, high pressure draught flows to backboard 3 from front screen 1, therefore when there is radial deflection in rotor, under the effect of high pressure draught, owing to offering the decompressing groove 31 of indent on backboard 3 on the pressure-bearing surface of brush tow 2, therefore the brush tow of skew side will enter in decompressing groove 31, and do not contact with the pressure-bearing surface of backboard 3, thereby slow down the firmization effect of brush tow, contact force between brush silk point and rotor is reduced, wearing and tearing between brush silk and rotor reduce, the final brush tow that improves is to the sealability of rotor and the working life of brushing tow, on the other hand, when high velocity air enters seal arrangement by front screen 1, on pressure-bearing surface due to backboard 3, offer decompressing groove 31, therefore high velocity air will enter in decompressing groove 31 after brushing tow 2, thereby in the both sides of brush tow 2, form the baric area of a relative equilibrium, reduce brush silk hesitation, and the brush silk after skew is restored rapidly, thereby alleviate the phenomenon that brush silk hangs, improve the sealability of brush tow 2.
Particularly, in the present embodiment, as shown in Figure 2, decompressing groove 31 is annular groove, and is opened in the center of the pressure-bearing surface of backboard 3.Because brush tow 2 be annulus, thus when decompressing groove 31 be annular groove, and while being arranged at the center of pressure-bearing surface of backboard 3, can make to brush stressed more even, the balance of tow 2, sealing effect is better.
Preferably, in actual work, the operating ambient temperature of front screen 1 and backboard 3 is generally 450 ° of left and right, in order to improve the high-temperature resistance of brush seal installation, therefore in the present embodiment, the material of front screen 1 and backboard 3 is all selected the high-temperature alloy material GH4169 that high-temperature resistance is stronger, and this alloy material GH4169 can bear the high temperature of 650 ° of left and right.
Similarly, for making brush seal installation can be suitable for higher rotating speed environment and thering is longer working life, in the present embodiment, the material of brush tow 2 is nickel, chromium, aluminum-base high-temperature alloy GH4137, and this kind of refractory alloy GH4137 can bear the high temperature of 600 ° of left and right.
More preferably, brush tow 2 and front screen 1 weld by electron beam welding technique, brush tow 2 and backboard 3 also weld by electron beam welding technique, by electron beam welding process, front screen 1, brush tow 2 and backboard 3 threes are welded and fused, the performance of the high brush seal installation of join strength is each other more stable.
In the utility model, as shown in Figure 3 and Figure 4, sealing device also comprises that aft cover plate 4 is sheathed on rotor and is installed in front screen 1 and brushes between tow 2 for slowing down the aft cover plate 4 of high pressure draught to the effect of brush tow.When high pressure draught arrives decompressing groove 31 when interior through brush tow 2, the air-flow that blows at a high speed brush tow 2 may cause " upset " to brush silk, the normal work of impact brush tow 2, so aft cover plate 4 is set at the front end of brush tow 2, alleviates high velocity air " upset " effect to brush tow 2.
Preferably, aft cover plate 4 is structure in the form of a ring, offers many airslides 41 that extend towards its outer ring surface on its inner ring surface, and airslide 41 connects in two surperficial directions of vertical aft cover plate 4.When high velocity air blows to aft cover plate 4, owing to offering airslide 41 on aft cover plate 4, will be through entering into after airslide 41 in brush tow 2 therefore blow to the air-flow of aft cover plate 4.By aft cover plate 4 being set before brush tow 2, can effectively reduce air-flow " blowing volt " to brush silk, when air-flow can produce a radial force of pointing to axle center to brush silk when brush silk flows, increase brush silk towards the movement tendency of rotor axis direction, and then reduce the silk point of brush silk and the gap between rotor outer surface, thereby reduce, leak; The high velocity air that while aft cover plate 4 can also be alleviated upstream blows to " upset " while brushing tow 2, brush silk being caused.
Particularly, in the present embodiment, as shown in Figure 4, airslide 41 is 8mm along the length of aft cover plate 4 radial direction, and airslide 41 is 0.2mm along the width of aft cover plate 4 contour directions.
Preferably, in the present embodiment, the number of airslide 41 is 45, and these 45 airslides 41 are distributed on aft cover plate 4 along the contour direction of aft cover plate 4, is conducive to slow down " upset " when high velocity air blows to brush tow, brush silk being caused.
Similarly, in order to improve the high-temperature resistance of brush seal installation, therefore in the present embodiment, and the high-temperature alloy material GH4169 that the material selection high-temperature resistance of aft cover plate 4 is stronger, this alloy material GH4169 can bear the high temperature of 650 °.
Similarly, by electron beam welding process, aft cover plate 4 and front screen 1 are welded and fixed, improve bulk strength and the sealability of seal arrangement.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
1, brush seal installation of the present utility model, when there is radial deflection in rotor, under the effect of high pressure draught, the brush tow of skew side will enter in decompressing groove 31, and do not contact with the pressure-bearing surface of backboard 3, thereby slow down the firmization effect of brushing tow, the contact force between brush silk point and rotor is reduced, wearing and tearing between brush silk and rotor reduce, the final raising working life of brush tow to the sealability of rotor and brush tow; On the other hand, high velocity air will enter in decompressing groove 31 after brushing tow 2, thereby in the both sides of brush tow 2, form the baric area of a relative equilibrium, reduce brush silk hesitation, brush silk after skew is restored rapidly, thereby alleviate the phenomenon that brush silk hangs, improve the sealability of brush tow 2;
2, the material of front screen 1 and backboard 3 is all selected the high-temperature alloy material GH4169 that high-temperature resistance is stronger, can improve the high-temperature resistance of brush seal installation;
3, the material of brush tow 2 is nickel, chromium, aluminum-base high-temperature alloy GH4137, makes brush seal installation can be suitable for higher rotating speed environment and has longer working life;
4, front screen 1, brush tow 2 and backboard 3 threes are welded and fused, and the performance of the high brush seal installation of join strength is each other more stable;
5, by aft cover plate 4 being set before brush tow 2, can effectively reduce air-flow " blowing volt " to brush silk, reduce and leak; The high velocity air that while aft cover plate 4 can also be alleviated upstream blows to " upset " while brushing tow 2, brush silk being caused.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a brush seal installation, for rotor is carried out to hermetic seal, is characterized in that, comprising:
Front screen (1), is sheathed on described rotor;
Brush tow (2), is sheathed on described rotor and is installed in the inner side of described front screen (1);
Backboard (3), is sheathed on described rotor and is installed in the inner side of described brush tow (2), offers the decompressing groove (31) of indent with described brush tow (2) on the pressure-bearing surface contacting of described backboard (3).
2. brush seal installation according to claim 1, is characterized in that,
Described decompressing groove (31) is annular groove, is opened in the center of the pressure-bearing surface of described backboard (3).
3. brush seal installation according to claim 2, is characterized in that,
Described front screen (1) for material be the front screen (1) of GH4169;
Described backboard (3) for material be the backboard (3) of GH4169;
Described brush tow (2) for material be the brush tow (2) of GH4137.
4. brush seal installation according to claim 3, is characterized in that,
Described brush tow (2) and described front screen (1) weld by electron beam welding, and described brush tow (2) and described backboard (3) weld by electron beam welding.
5. according to the brush seal installation described in any one in claim 1 to 4, it is characterized in that,
Described device also comprises:
Aft cover plate (4), be sheathed on described rotor and be installed in described front screen (1) and described brush tow (2) between.
6. brush seal installation according to claim 5, is characterized in that,
Described aft cover plate (4) is structure in the form of a ring, offers many airslides (41) that extend towards its outer ring surface on its inner ring surface, and described airslide (41) connects in two surperficial directions of vertical described aft cover plate (4).
7. brush seal installation according to claim 6, is characterized in that,
Described airslide (41) is 8mm along the length of described aft cover plate (4) radial direction, and described airslide (41) is 0.2mm along the width of described aft cover plate (4) contour direction.
8. brush seal installation according to claim 7, is characterized in that,
Many described airslides (41) are distributed on described aft cover plate (4) along the contour direction of described aft cover plate (4).
9. brush seal installation according to claim 8, is characterized in that,
Described aft cover plate (4) for material be the aft cover plate (4) of GH4169.
10. brush seal installation according to claim 8, is characterized in that,
Described aft cover plate (4) is fixing by electron beam welding and described front screen (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557193.1U CN203499823U (en) | 2013-09-09 | 2013-09-09 | Brush type sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557193.1U CN203499823U (en) | 2013-09-09 | 2013-09-09 | Brush type sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203499823U true CN203499823U (en) | 2014-03-26 |
Family
ID=50330810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320557193.1U Expired - Lifetime CN203499823U (en) | 2013-09-09 | 2013-09-09 | Brush type sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203499823U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454030A (en) * | 2014-11-14 | 2015-03-25 | 中国航空动力机械研究所 | High-pressure-resisting low-hysteresis brush type sealing device |
| CN106761955A (en) * | 2016-12-30 | 2017-05-31 | 江苏鑫信润科技有限公司 | F type contrate bicavate brush steam seals |
| 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 |
| CN107965391A (en) * | 2017-11-23 | 2018-04-27 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of seal structure between the quiet rotor of aero-engine |
| CN108979739A (en) * | 2018-08-20 | 2018-12-11 | 辽宁天航空科技有限公司 | Brush seal |
-
2013
- 2013-09-09 CN CN201320557193.1U patent/CN203499823U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454030A (en) * | 2014-11-14 | 2015-03-25 | 中国航空动力机械研究所 | High-pressure-resisting low-hysteresis brush type sealing device |
| CN106761955A (en) * | 2016-12-30 | 2017-05-31 | 江苏鑫信润科技有限公司 | F type contrate bicavate brush steam seals |
| 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 |
| CN107965391A (en) * | 2017-11-23 | 2018-04-27 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of seal structure between the quiet rotor of aero-engine |
| CN108979739A (en) * | 2018-08-20 | 2018-12-11 | 辽宁天航空科技有限公司 | Brush seal |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |