CN108757055B - Labyrinth seal structure with brush type sealing strip - Google Patents
Labyrinth seal structure with brush type sealing strip Download PDFInfo
- Publication number
- CN108757055B CN108757055B CN201810508427.0A CN201810508427A CN108757055B CN 108757055 B CN108757055 B CN 108757055B CN 201810508427 A CN201810508427 A CN 201810508427A CN 108757055 B CN108757055 B CN 108757055B
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- Prior art keywords
- brush
- seal
- rotor
- labyrinth
- strip
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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
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
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- 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
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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
- F05D2240/00—Components
- F05D2240/55—Seals
- F05D2240/56—Brush seals
Abstract
The invention discloses a labyrinth seal structure with brush seal strips, which comprises labyrinth seals and brush seal strips, wherein the labyrinth seals are sleeved on the circumferential direction of a rotor and have a gap with a rotor bracket, each labyrinth seal comprises a seal body and labyrinth teeth arranged on the inner side of the seal body, the brush seal strips are axially assembled in axial through grooves formed on the inner sides of the labyrinth seals and axially penetrate through the seal body, and at least four brush seal strips are arranged along the circumferential direction of the labyrinth seals. The invention provides a labyrinth seal structure with brush seal strips aiming at the requirements of an impeller mechanical rotor system on reducing forward rotational flow of a seal cavity, improving dynamic characteristics of a seal rotor, improving stability of the rotor and reducing seal leakage, so that the forward rotational flow of the seal cavity can be effectively reduced, effective damping of the traditional labyrinth seal is increased, the seal leakage is reduced, the problem of rotor vibration instability is solved, and the stability and the sealing performance of the rotor system are improved.
Description
Technical Field
The invention belongs to the technical field of rotary mechanical sealing, and particularly relates to a labyrinth sealing structure which is circumferentially provided with a brush type sealing strip with rotation stopping and vibration inhibiting functions.
Background
In turbomachines such as steam turbines, gas turbines, pumps, and compressors, a rotary seal is installed between a rotary part and a stationary part, and leakage flow from a high-pressure region to a low-pressure region through a dynamic-static gap is controlled, which has a significant influence on the operating efficiency of the turbomachines. In the prior art, the labyrinth seal structure is simple, low in cost and convenient for engineering application, and is the most common seal form in the field of impeller machinery.
The rotary seal can generate unsteady fluid excitation force while controlling leakage flow, and the unsteady fluid excitation force affects the stability of a rotor system. Fig. 1a and 1b show a traditional straight-through type labyrinth sealing structure, wherein an annular chamber of the labyrinth sealing structure is circumferentially continuous, fluid generates circumferential swirling velocity under the action of viscous friction force of a rotor surface rotating at high speed, and the swirling velocity is stronger when the rotating speed is higher. Thus, labyrinth seals are prone to destabilization of turbomachinery rotor systems at high rotational speeds. At present, the problems are solved by measures such as replacing advanced rotary damping sealing elements, adjusting sealing dynamic and static gaps, installing a rotation stopping device to improve inflow conditions and the like.
As shown in FIG. 1c, in engineering application, the circumferential velocity of the air flow can be reduced by adding a conventional circumferential baffle to the circumferential direction of a conventional labyrinth seal, so as to reduce the vibration amplitude of the rotor, but in order to prevent the rotor from being rubbed, the radial clearance between all stator parts and the rotor is large, and the circumferential rotational flow velocity near the rotor surface caused by the high-speed rotation of the rotor cannot be well eliminated.
Besides, the leakage amount of the brush seal is only 1/5-1/10 of the labyrinth seal. Brush seals have been used in the field of turbomachinery, such as aircraft engines, industrial gas turbines and steam turbines.
Therefore, the research and development of the novel labyrinth seal capable of effectively reducing the forward rotational flow speed in the sealing cavity has important engineering application value for improving the dynamic characteristic of the sealed rotor and improving the stability of the rotor.
Disclosure of Invention
The invention provides a labyrinth seal structure with a brush seal strip aiming at the requirements of an impeller mechanical rotor system on reducing leakage, improving dynamic characteristics of a sealed rotor and improving stability of the rotor, so that the labyrinth seal structure can effectively reduce forward rotational flow speed of a seal cavity, increase effective damping of rotary seal and reduce leakage of seal, thereby improving stability of the rotor system and sealing performance.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a labyrinth seal structure of taking brush sealing strip, this labyrinth seal structure is including labyrinth seal and the brush sealing strip of getting rid of behind the brush sealing strip, labyrinth seal who gets rid of behind the brush sealing strip is used for the suit in the circumference of rotor, and leave labyrinth tooth and rotor radial clearance with the rotor support, labyrinth seal who gets rid of behind the brush sealing strip includes the seal and sets up the inboard labyrinth tooth at the seal, the brush sealing strip assembles in the brush seal groove of seting up in the labyrinth seal inboard of getting rid of behind the brush sealing strip along the axial, and run through the seal along the axial, and a plurality of brush sealing strips are arranged along the equal radian in labyrinth seal circumference after getting rid of the brush sealing strip, form the labyrinth seal of taking.
The invention is further improved in that the number of the brush type sealing strips is 4,6 or 8.
The single brush type sealing strip is further improved in that the single brush type sealing strip comprises a brush wire bundle, a front baffle and a rear baffle, the front baffle is located on the upstream side in the rotation direction of a rotor, the rear baffle is located on the downstream side in the rotation direction of the rotor, the brush wire bundle is fixed by the front baffle and the rear baffle, and the brush wires of the brush wire bundle adopt high-temperature-resistant cobalt-based alloy wires with the diameter of 0.05-0.15 mm.
The invention is further improved in that a radial clearance between the brush filament bundle and the rotor or the radial interference amount between the brush filament bundle and the rotor, which is smaller than the radial clearance between the brush sealing strip rear baffle and the rotor, is arranged between the brush filament bundle and the rotor.
The invention is further improved in that the radial clearance between the brush tows and the rotor or the radial interference between the brush tows and the rotor is less than 0.2 mm.
The invention is further improved in that the radial clearance between the brush seal strip front baffle and the rotor is larger than that between the brush seal strip rear baffle and the rotor, the radial clearance between the brush seal strip rear baffle and the rotor is not larger than that between the traditional circumferential baffle and the rotor, and the radial clearance is consistent with that between the labyrinth teeth and the rotor.
The invention is further improved in that the rear baffle of the brush type sealing strip is provided with an annular pressure reduction groove.
A further improvement of the invention is that the axial width of the brush seal strip is consistent with the axial width of the labyrinth seal.
The invention is further improved in that the brush seal strip is axially fixed in the brush seal groove of the labyrinth seal by means of fastening bolts.
The further improvement of the invention is that the included angle between the brush seal groove and the radial direction of the rotor is the included angle between the brush seal groove and the radial direction of the rotor, the value range is 30-60 degrees, the included angle between the brush seal strip and the radial direction of the rotor is the included angle between the brush seal strip and the radial direction of the rotor, the value range is 30-60 degrees, and the included angle between the brush seal groove and the radial direction of the rotor is equal to the included angle between the brush seal strip and the.
The invention has the following beneficial technical effects:
the invention is characterized in that the brush type sealing strips are axially assembled in the brush type sealing grooves on the inner sides of the labyrinth seals after the brush type sealing strips are removed, the brush type sealing strips penetrate through the sealing bodies along the axial direction, and the brush type sealing strips are arranged in the circumferential direction of the labyrinth seals after the brush type sealing strips are removed in an equal radian mode, wherein the number of the brush type sealing strips is 4,6,8 and the like. Therefore, the brush sealing strip is used as a circumferential baffle to block the circumferential flow of fluid, compared with the characteristic that the gap between the traditional non-contact damping seal and the rotor is larger, the brush wire bundle is very small or is in direct contact with the gap between the rotor and has a certain interference amount, the forward rotational flow speed of the fluid in the whole axial sealing cavity can be effectively reduced, and the purposes of improving the dynamic characteristic of the rotary seal rotor and enhancing the stability of the rotor are achieved.
Furthermore, a front baffle of the single brush type sealing strip is positioned at the upstream of the rotation direction of the rotor, a rear baffle is positioned at the downstream of the rotation direction of the rotor, the brush filament bundle is fixed by the front baffle and the rear baffle, and a radial clearance between the brush filament bundle and the rotor or a radial interference between the brush filament bundle and the rotor, which is smaller than the radial clearance between the rear baffle of the brush type sealing strip and the rotor, is arranged between the brush filament bundle and the rotor. And the radial clearance between the brush filament bundle and the rotor or the radial interference between the brush filament bundle and the rotor is less than 0.2 mm. When the airflow flowing circumferentially near the wall surface of the rotor caused by the rotation of the rotor flows through the brush tows, the brush tows generate obvious blocking effect on the airflow, so that the circumferential speed of the airflow is weakened, and the dynamic characteristic of the sealed rotor is improved.
Further, the radial clearance between the front baffle of the brush seal strip and the rotor is larger than that between the rear baffle of the brush seal strip and the rotor, so that the structure can generate obvious radial airflow in the brush wire bundle, and the radial airflow enables the brush wires to be well attached to the rotor or keeps a small clearance so as to maintain circumferential resistance to the airflow. Meanwhile, the radial clearance between the rear baffle plate and the rotor of the brush type sealing strip is not larger than the radial clearance between the traditional circumferential baffle plate and the rotor, and the radial clearance is preferably designed to be consistent with the radial clearance between the labyrinth teeth and the rotor, so that the design can further increase the resistance of the area above the height of the rear baffle plate to the circumferential flowing air flow, and further improve the dynamic characteristic of the sealed rotor.
Furthermore, the annular pressure reduction groove is formed in the rear baffle of the single brush type sealing strip, the hysteresis effect of the brush wire bundle can be reduced, the brush wire bundle can well move along the radial direction of the rotor when the rotor moves eccentrically, and therefore the brush wires are enabled to be well attached to the rotor or keep a small gap, and circumferential resistance to airflow is maintained.
Furthermore, the single brush type sealing strip is fixed in the brush type sealing groove of the labyrinth seal after the brush type sealing strip is removed by the fastening bolt along the axial direction, so that the brush type sealing strip and the labyrinth seal after the brush type sealing strip is removed can be independently processed, the batch production is convenient, and meanwhile, when the brush wire bundle of the brush type sealing strip is worn and needs to be replaced, the replacement can be conveniently carried out.
Furthermore, the brush-type sealing strip and the radial included angle of the rotor are 30-60 degrees, so that the brush filament bundle can elastically yield when the rotor radially deviates, and the excessive abrasion of the brush filament is avoided.
In addition, the leakage amount of the brush seal is only 1/5-1/10 of the labyrinth seal, so that the leakage amount of the labyrinth seal with the brush seal strip is smaller than that of the original labyrinth seal.
Drawings
FIG. 1a is a schematic radial cross-sectional view of a conventional prior art labyrinth seal;
FIG. 1b is a three-dimensional block diagram of a conventional prior art labyrinth seal;
FIG. 1c is a prior art three-dimensional block diagram of a labyrinth seal with conventional circumferential baffles;
FIG. 2 is a three-dimensional structure diagram of a labyrinth seal with a brush seal strip according to the present invention;
FIG. 3 is a three-dimensional block diagram of the labyrinth seal with the brush seal removed in accordance with the present invention;
FIG. 4 is an enlarged partial view of the cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a schematic axial cross-sectional view of the labyrinth seal with the brush seal removed in accordance with the present invention;
FIG. 6 is a schematic axial cross-sectional view of a labyrinth seal with a brush seal according to the present invention, wherein FIG. 6(b) is a partially enlarged view of FIG. 6 (a);
FIG. 7 is a schematic view of the brush seal and labyrinth seal assembly (axial) of the present invention;
FIG. 8 is a schematic axial cross-sectional view of a brush seal strip according to the present invention;
FIG. 9 is a view from direction B of FIG. 8;
fig. 10 is a diagram showing the relative positions of the brush wire bundle and the rotor of the brush type sealing strip of the invention, wherein fig. 10(a) shows that a radial gap exists, and fig. 10(b) shows that a radial interference amount exists.
Wherein: 1 is a traditional labyrinth seal; 1a is a labyrinth seal with a traditional circumferential baffle; 2 is a labyrinth tooth; 2a is a radial clearance between the labyrinth teeth and the rotor; 2b is a conventional circumferential baffle; 3 is a rotor; 4 is a sealing body; 5, labyrinth seal with brush type sealing strip; 6, a brush type sealing strip; 7 is a brush type sealing groove; 8, removing the labyrinth seal with the brush type sealing strip; 9a labyrinth seal assembling threaded holes; 9b is a brush type sealing strip assembling threaded hole; 10a is a radial included angle between the brush type sealing groove and the rotor; 10b is a radial included angle between the brush type sealing strip and the rotor; 11 is a front baffle; 12 is a rear baffle; 13 is a brush tow; 14 is the rotor radial direction; 15 is an annular pressure reducing groove; 16a is the labyrinth seal axial width; 16b is the axial width of the brush seal strip; 17 is a fastening bolt; 18a is the top tangential direction of the brush silk bundle; 18b is the tangential direction of each position of the rotor; 19a is the radial clearance between the brush silk bundle and the rotor; 19b is the radial interference amount of the brush tows and the rotor; 20, a radial gap between a rear baffle of the brush type sealing strip and the rotor; 21, a radial gap between a front baffle of the brush type sealing strip and the rotor; 22 is the top tangential direction of the front baffle plate; 23 is the tailgate top tangent.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and the protection scope of the present invention is not limited thereby.
The specific structure of the invention is shown in the attached figures 2-10:
referring to fig. 2, the labyrinth seal structure with the brush seal strip provided by the invention comprises a labyrinth seal 8 with the brush seal strip removed and a brush seal 6, wherein the labyrinth seal 8 with the brush seal strip removed is used for being sleeved on the circumference of a rotor 3, and a gap 2a is reserved between the labyrinth seal 8 with the brush seal strip removed and a rotor 3 bracket, the labyrinth seal 8 with the brush seal strip removed comprises a sealing body 4 and labyrinth teeth 2 arranged on the inner side of the sealing body 4, and the brush seal 6 is axially arranged in a brush seal groove 7 of the labyrinth seal 8 with the brush seal strip removed, so that a labyrinth seal 5 with the brush seal strip is obtained; the labyrinth seal axial width 16a is designed in accordance with the actual design.
Referring to fig. 3, 4 and 5, in the labyrinth seal 8 with the brush seal removed according to the present invention, a brush seal groove 7 penetrating in the axial direction is formed in a circumferential direction of the conventional labyrinth seal 1 in an equi-arc shape, and the number of the brush seal grooves 7 is 4,6,8, or the like.
Referring to fig. 3 and 4, each brush seal groove 7 is provided with labyrinth seal mounting screw holes 9a, and the number of the labyrinth seal mounting screw holes 9a in each brush seal groove 7 in the axial direction is 3,6,9, and the like.
Referring to fig. 5, an included angle between the brush seal groove 7 and the radial direction 14 of the rotor is 10a, and the value range is 30-60 °.
Referring to fig. 6 and 7, brush seal strips 6 are circumferentially installed on a labyrinth seal 5 with brush seal strips, the number of the brush seal strips 6 is the same as that of the brush seal grooves 7 on a labyrinth seal 8 with the brush seal strips removed, and the brush seal strips 6 and the labyrinth seal 8 with the brush seal strips removed are fixed through fastening bolts 17.
Referring to fig. 6, the included angle between the brush seal strip 6 and the radial direction 14 of the rotor is 10b, the range of the included angle is 30-60 degrees, and the included angle is consistent with 10a between the brush seal groove and the radial direction of the rotor in fig. 5.
Referring to fig. 8, the brush type sealing strip 6 of the invention is composed of a front baffle 11, a rear baffle 12 and a brush wire bundle 13, wherein the front baffle 11 is positioned at the upstream of the rotation direction of the rotor 3, the rear baffle 12 is positioned at the downstream of the rotation direction of the rotor 3, the brush wire bundle 13 is fixed by the front baffle 11 and the rear baffle 12, brush wires in the brush wire bundle 13 are made of 0.05-0.15 mm high-temperature-resistant cobalt-based alloy, and the rear baffle 12 is provided with an annular pressure reduction groove 15.
Referring to fig. 9, the brush seal strip 6 of the present invention is formed in an elongated shape with the brush seal strip fitting screw holes 9b arranged in the axial direction, and the number of the brush seal strip fitting screw holes 9b is identical to the number and the diameter of the labyrinth seal fitting screw holes 9a on the brush seal groove 7 of fig. 3.
Referring to fig. 9, the axial width 16b of the brush seal strip corresponds to the axial width 16a of the labyrinth seal in fig. 2.
Referring to fig. 10a and 10b, brush filament bundles 13 and a rotor 3 have a brush filament bundle and rotor radial gap 19a or a brush filament bundle and rotor radial interference amount 19b, the value of the brush filament bundle and rotor radial gap 19a is smaller than a labyrinth tooth and rotor radial gap 2a and also smaller than a radial gap between a traditional circumferential baffle 2b and the rotor 3, and the value range of the brush filament bundle and rotor radial gap 19a and the brush filament bundle and rotor radial interference amount 19b is 0-0.2 mm.
Referring to fig. 10(a) and 10(b), the backplate 12 and the front backplate 11 and the rotor 3 have a brush seal backplate and rotor radial gap 20 and a brush seal front backplate and rotor radial gap 21, respectively, the brush seal front backplate and rotor radial gap 21 is slightly larger than the brush seal backplate and rotor radial gap 20, and the brush seal backplate and rotor radial gap 20 is not larger than the radial gap between the conventional circumferential backplate 2b and the rotor 3 of fig. 1c, and preferably, may be designed to coincide with the labyrinth teeth and rotor radial gap 2 a.
The technical principle of the invention is as follows:
referring to fig. 1, in the turbo machine, since the rotor 3 rotates, and the inlet air flow entering the conventional labyrinth seal 1 has a circumferential pre-rotation speed identical to the rotation direction of the rotor 3, there is a circumferential speed identical to the rotation direction of the rotor 3 in the seal chamber. The research shows that: circumferential airflow in the sealed cavity can increase the cross rigidity of the seal, reduce effective damping and enable the rotor to generate vibration instability; the effective damping of the rotary seal can be increased by reducing the forward rotational flow speed in the seal cavity, and the stability of the rotor system is enhanced. Aiming at the defect that the radial clearance between the traditional circumferential baffle and the rotor 3 is large, the brush type sealing strip 6 is adopted as the circumferential baffle, the clearance between the brush silk bundle 13 and the rotor 3 is small or the brush silk bundle is in direct contact with the rotor 3 and has a certain interference amount, the forward rotational flow speed of fluid in a sealing cavity can be effectively reduced, and the purposes of improving the dynamic characteristic of the rotary sealing rotor and enhancing the stability of the rotor are achieved. Meanwhile, the front baffle 11 is slightly higher than the rear baffle 12, and the generated radial airflow can enable the brush wires to be well attached to the rotor or keep a small gap so as to maintain circumferential resistance to the airflow; the annular pressure relief groove 15 in the brush seal backplate reduces the hysteresis effect of the brush bundle 13 so that the brush bundle 13 can follow the rotor 3 radially well when the rotor 3 moves eccentrically, thereby ensuring that the brush filaments remain well attached to the rotor or a small gap is maintained to maintain circumferential resistance to airflow.
In addition, the leakage amount of the brush seal is only 1/5-1/10 of the labyrinth seal, so that the leakage amount of the labyrinth seal with the brush seal strip is smaller than that of the labyrinth seal with the original design.
The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications may be made without departing from the technical spirit of the present invention, and such modifications should be construed as being included in the scope of the present invention.
Claims (7)
1. A labyrinth seal structure with a brush seal strip is characterized by comprising a labyrinth seal (8) with the brush seal strip removed and a brush seal strip (6), wherein the labyrinth seal (8) with the brush seal strip removed is used for being sleeved on the circumference of a rotor (3), and a labyrinth tooth and rotor radial clearance (2a) is reserved between the labyrinth tooth and the rotor (3) bracket, the labyrinth seal (8) after the brush seal strip is removed comprises a seal body (4) and the labyrinth tooth (2) arranged on the inner side of the seal body (4), the brush seal strip (6) is axially assembled in a brush seal groove (7) formed on the inner side of the labyrinth seal (8) after the brush seal strip is removed, the sealing body (4) penetrates through the axial direction, and the plurality of brush type sealing strips (6) are arranged along the circumferential direction of the labyrinth seal (8) with the brush type sealing strips removed in an equal radian manner to form a labyrinth seal (5) with the brush type sealing strips;
the single brush type sealing strip (6) comprises a brush wire bundle (13), a front baffle plate (11) and a rear baffle plate (12), the front baffle plate (11) is located on the upstream side of the rotation direction of the rotor (3), the rear baffle plate (12) is located on the downstream side of the rotation direction of the rotor (3), the brush wire bundle (13) is fixed by the front baffle plate (11) and the rear baffle plate (12), and the brush wires of the brush wire bundle (13) are made of high-temperature-resistant cobalt-based alloy wires with the diameter of 0.05-0.15 mm;
the radial clearance (21) between the front baffle of the brush sealing strip and the rotor is larger than the radial clearance (20) between the rear baffle of the brush sealing strip and the rotor, the radial clearance (20) between the rear baffle of the brush sealing strip and the rotor is not larger than the radial clearance between the traditional circumferential baffle (2b) and the rotor (3), and the radial clearance is consistent with the radial clearance (2a) between the labyrinth teeth and the rotor; an annular decompression groove (15) is formed in a rear baffle (12) of the brush type sealing strip (6).
2. The labyrinth sealing structure with the brush type sealing strip according to claim 1, characterized in that the number of the brush type sealing strips (6) is 4,6 or 8.
3. A labyrinth seal with brush seals according to claim 1, characterized in that between the bundle of brush filaments (13) and the rotor (3) there is provided a bundle of brush filaments-rotor radial clearance (19a) or a bundle of brush filaments-rotor radial interference (19b) smaller than the brush seal backplate-rotor radial clearance (20).
4. The labyrinth sealing structure with the brush type sealing strip according to the claim 1, characterized in that the clearance (19a) between the brush tows and the rotor or the interference (19b) between the brush tows and the rotor is less than 0.2 mm.
5. A labyrinth seal with brush seal according to claim 1, characterised in that the axial width (16b) of the brush seal coincides with the axial width (16a) of the labyrinth seal.
6. A labyrinth seal with brush seal according to claim 1, characterised in that the brush seal (6) is fixed axially in the brush seal groove (7) of the labyrinth seal (8) by means of fastening bolts (17).
7. The labyrinth seal structure with the brush seal strip according to claim 1, characterized in that the included angle between the brush seal groove (7) and the rotor radial direction (14) is the included angle (10a) between the brush seal groove and the rotor radial direction (14) and ranges from 30 ° to 60 °, the included angle between the brush seal strip (6) and the rotor radial direction (14) is the included angle (10b) between the brush seal groove and the rotor radial direction (10b) and ranges from 30 ° to 60 °, and the included angle (10a) between the brush seal groove and the rotor radial direction is equal to the included angle (10b) between the brush seal groove and the rotor radial direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810508427.0A CN108757055B (en) | 2018-05-24 | 2018-05-24 | Labyrinth seal structure with brush type sealing strip |
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| CN201810508427.0A CN108757055B (en) | 2018-05-24 | 2018-05-24 | Labyrinth seal structure with brush type sealing strip |
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| CN108757055B true CN108757055B (en) | 2020-07-28 |
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| CN113431902A (en) * | 2021-05-13 | 2021-09-24 | 东南大学 | Flow regulation and control type vibration damping sealing device |
| CN114183532A (en) * | 2021-11-25 | 2022-03-15 | 沈阳鼓风机集团股份有限公司 | Sealing structure of turbine and turbine |
| CN114635757B (en) * | 2022-02-23 | 2023-12-12 | 潍柴动力股份有限公司 | Rotor sealing device |
| CN114991883B (en) * | 2022-05-24 | 2023-08-11 | 中国科学院工程热物理研究所 | Radial multilayer brush silk brush formula seal structure |
| CN115163213A (en) * | 2022-08-17 | 2022-10-11 | 东方电气集团东方汽轮机有限公司 | Rotary power generation equipment with isolation steam seal structure |
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| US6390476B1 (en) * | 2000-09-08 | 2002-05-21 | General Electric Company | Heat-resistant magnetic silicone rubber brush seals in turbomachinery and methods of application |
| US8777563B2 (en) * | 2011-01-31 | 2014-07-15 | General Electric Company | Axial brush seal |
| CN102900476B (en) * | 2012-09-21 | 2014-11-26 | 清华大学 | Low-leakage brush type sealing structure based on piezoelectric effect |
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