CN107630721B - Equal-split circumference spliced brush type seal - Google Patents
Equal-split circumference spliced brush type seal Download PDFInfo
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- CN107630721B CN107630721B CN201710945352.8A CN201710945352A CN107630721B CN 107630721 B CN107630721 B CN 107630721B CN 201710945352 A CN201710945352 A CN 201710945352A CN 107630721 B CN107630721 B CN 107630721B
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- brush
- backplate
- brush ring
- ring section
- front baffle
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to an equally-divided circumference spliced brush type seal, and belongs to the technical field of turbine seals. The invention comprises a front baffle, a rear baffle, a brush filament bundle, a fixed connection, a stator and a screw; the front baffle is located the air current high pressure department, and the backplate is located the air current low pressure department, and brush silk bundle is installed between front baffle and backplate through fixed connection clamp, and concave annular decompression groove has been seted up to backplate and brush silk bundle contact pressure-bearing face, and front baffle, backplate, brush silk bundle, fixed connection installation are constituteed the brush ring section, evenly offer the screw hole on the backplate of brush ring section, and the brush ring section passes through screw hole and the screw installation on the backplate on the stator, and the brush ring section is constituteed the brush ring along the direction of brush silk installation angle. The invention can pertinently replace the brush ring section with the brush wires severely worn, thereby avoiding resource waste caused by replacing the whole brush ring; the leakage is low, and the sealing property is good; the disassembly is convenient, and the maintenance is easy; under the same cost, the whole service life of the brush ring can be prolonged by segment re-splicing, and the economic benefit can be improved.
Description
Technical Field
The invention relates to an equally-divided circumference spliced brush type seal, and belongs to the technical field of turbine seals.
Background
The brush seal is used as an adaptive interference seal form, is widely applied to aeroengines in recent years instead of labyrinth seals, and has a sealing characteristic under the condition of three high speeds, namely high rotating speed, high pressure difference and high boundary rotating speed of the aeroengines. The brush type sealed front baffle is positioned on the high pressure side of the air flow, the rear baffle is positioned on the low pressure side of the air flow, brush wires and the radial center of the rotor form a circumferential included angle of 45-55 degrees, and the brush type sealed front baffle and the rear baffle are closely arranged and fixed between the front baffle and the rear baffle. A great number of theories and practices at home and abroad show that after the brush wire is moved to the radial direction by the rotor runway to deviate, when the rotor is separated from deviation or is decelerated, the brush wire is suspended due to friction force between the brush wire and the back plate, brush wire hysteresis effect occurs, and the sealing performance of brush type seal is affected.
Due to the flexibility of brush type sealing brush wires, the brush type sealing can adapt to the change of transient radial clearance between an engine rotor and a stator or the eccentric movement of the rotor, after long-term working, the radial runout of the rotor leads to the abrasion of brush wire tips on the circumference of a brush ring to different degrees, the sealing property of the brush ring is influenced, and even the sealing is invalid. After long-time use, the adhesion abrasion of the brush type bundle end part and the rotor causes the increase of clearance and leakage, the sealing failure affects the performance of the aeroengine, and at the moment, the brush ring needs to be replaced integrally, if other parts of the brush ring are not abraded obviously, a part of brush wires lose the utilization value, and the resource waste is caused.
Disclosure of Invention
The invention aims to provide an equally-divided circumference spliced brush type seal, which solves the problem that resources are wasted because the local brush wires in a brush ring are seriously worn and need to be replaced integrally due to the change of a transient radial gap between a rotor and a stator or the eccentric motion of the rotor.
The invention is realized according to the following technical scheme: an equally-divided circumference spliced brush type seal comprises a front baffle plate 1, a rear baffle plate 2, brush filament bundles 3, a fixed connection 8, a stator 9 and screws 10; the front baffle 1 is positioned at the high pressure of the air flow, the rear baffle 2 is positioned at the low pressure of the air flow, the brush filament bundles 3 are installed between the front baffle and the rear baffle 2 in a clamping manner through the fixed connection 8, the inner concave annular decompression groove 4 is formed in the contact bearing surface of the rear baffle 2 and the brush filament bundles 3, the annular decompression groove 4 can reduce the hysteresis effect of brush type sealing, the inner diameter of the front baffle 1 is flush with the outer diameter of the annular decompression groove 4 formed in the rear baffle 2, the front baffle 1, the rear baffle 2, the brush filament bundles 3 and the fixed connection 8 are connected and installed to form a brush ring section 6, threaded holes 5 are uniformly formed in the rear baffle 2 of the brush ring section 6, the brush ring section 6 is installed on the stator 9 through the threaded holes 5 and screws 10 in the rear baffle 2, and the brush ring section 6 forms a brush ring 7 along the direction of the installation angle of the brush filament.
The brush ring 7 consists of N brush ring segments 6, and N can be 3-8 according to application requirements.
The working principle of the equal-dividing circumference splicing brush type seal is as follows: during processing, the brush ring 7 is divided into N parts of brush ring segments 6 equally according to the size of the brush ring 7, the brush ring segments 6 are assembled in batches along the installation angle direction of brush wires of the brush wire bundles 3, then the N equal parts of brush ring segments 6 are spliced into one brush ring 7 in sequence, and each brush ring segment 6 is fixedly installed on a stator 9 through a screw 10. In the use process, the change of the transient radial clearance between the rotor 11 and the stator 9 or the eccentric movement of the rotor 11 causes the brush wires of the local brush wire bundles 3 of the brush ring 7 to be damaged, and when the local brush wires are worn seriously, the brush ring section 6 which is particularly positioned is found, and the brush ring section 6 which is of the same type and is intact is replaced, so that the work is continued. Meanwhile, the annular decompression groove 4 formed in the rear baffle 2 can reduce the hysteresis effect of brushing wires, reduce gas leakage and improve the sealing property of the rear baffle.
The invention has the following beneficial effects:
1. the brush ring section with the brush wires severely worn can be replaced in a targeted manner, so that resource waste caused by replacing the whole brush ring is avoided;
2. the leakage is low, and the sealing property is good;
3. the structure is simple, the disassembly is convenient, and the maintenance is easy;
4. under the same cost, the whole service life of the brush ring can be prolonged by segment re-splicing, and the economic benefit can be improved.
Drawings
FIG. 1 is a front view of a brush ring segment structure of the present invention;
FIG. 2 is a schematic three-dimensional structure of a brush ring segment according to the present invention;
FIG. 3 is a schematic view of a brush ring structure formed by brush ring segments according to the present invention;
FIG. 4 is a schematic view of the brush ring segment and stator mounting structure of the present invention
FIG. 5 is a schematic view of the three-dimensional structure of the tailgate of the invention.
The reference numerals in the figures are: 1: front baffle, 2: a rear baffle plate, 3: brushing filament bundles, 4: annular decompression groove, 5: screw hole, 6: brush ring segment, 7: brush ring, 8: fixedly connected with 9: stator, 10: screw, 11: a rotor.
Detailed Description
The invention will be further described with reference to the drawings and examples, but the invention is not limited to the scope.
Example 1: 1-5, an equally-divided circumference spliced brush type seal comprises a front baffle plate 1, a rear baffle plate 2, brush filament bundles 3, a fixed connection 8, a stator 9 and screws 10; the front baffle 1 is located the air current high pressure department, the backplate 2 is located the air current low pressure department, brush silk bundle 3 presss from both sides tightly through fixed connection 8 and installs between front baffle and backplate 2, the annular decompression groove 4 of indent has been seted up to backplate 2 and brush silk bundle 3 contact pressure-bearing surface, the external diameter parallel and level of annular decompression groove 4 of seting up on front baffle 1 internal diameter and the backplate 2, front baffle 1, backplate 2, brush silk bundle 3, fixed connection 8 connect the installation and constitute brush ring section 6, evenly set up threaded hole 5 on the backplate 2 of brush ring section 6, brush ring section 6 passes through threaded hole 5 on the backplate 2 and installs on stator 9 with screw 10, brush ring section 6 constitutes brush ring 7 along the direction of brush silk installation angle.
The brush ring 7 is composed of 3 brush ring segments 6.
Example 2: 1-5, an equally-divided circumference spliced brush type seal comprises a front baffle plate 1, a rear baffle plate 2, brush filament bundles 3, a fixed connection 8, a stator 9 and screws 10; the front baffle 1 is located the air current high pressure department, the backplate 2 is located the air current low pressure department, brush silk bundle 3 presss from both sides tightly through fixed connection 8 and installs between front baffle and backplate 2, the annular decompression groove 4 of indent has been seted up to backplate 2 and brush silk bundle 3 contact pressure-bearing surface, the external diameter parallel and level of annular decompression groove 4 of seting up on front baffle 1 internal diameter and the backplate 2, front baffle 1, backplate 2, brush silk bundle 3, fixed connection 8 connect the installation and constitute brush ring section 6, evenly set up threaded hole 5 on the backplate 2 of brush ring section 6, brush ring section 6 passes through threaded hole 5 on the backplate 2 and installs on stator 9 with screw 10, brush ring section 6 constitutes brush ring 7 along the direction of brush silk installation angle.
The brush ring 7 is composed of 5 brush ring segments 6.
Example 3: 1-5, an equally-divided circumference spliced brush type seal comprises a front baffle plate 1, a rear baffle plate 2, brush filament bundles 3, a fixed connection 8, a stator 9 and screws 10; the front baffle 1 is located the air current high pressure department, the backplate 2 is located the air current low pressure department, brush silk bundle 3 presss from both sides tightly through fixed connection 8 and installs between front baffle and backplate 2, the annular decompression groove 4 of indent has been seted up to backplate 2 and brush silk bundle 3 contact pressure-bearing surface, the external diameter parallel and level of annular decompression groove 4 of seting up on front baffle 1 internal diameter and the backplate 2, front baffle 1, backplate 2, brush silk bundle 3, fixed connection 8 connect the installation and constitute brush ring section 6, evenly set up threaded hole 5 on the backplate 2 of brush ring section 6, brush ring section 6 passes through threaded hole 5 on the backplate 2 and installs on stator 9 with screw 10, brush ring section 6 constitutes brush ring 7 along the direction of brush silk installation angle.
The brush ring 7 is composed of 8 brush ring segments 6.
Claims (1)
1. An equally divided circumference splice brush seal device, characterized in that: comprises a front baffle (1), a rear baffle (2), a brush silk bundle (3), a fixed connection (8), a stator (9) and a screw (10); front baffle (1) is located air current high pressure department, backplate (2) are located air current low pressure department, brush silk bundle (3) clamp through fixed connection (8) install between front baffle and backplate (2), indent annular decompression groove (4) have been seted up with brush silk bundle (3) contact pressure bearing surface to backplate (2), the external diameter parallel and level of annular decompression groove (4) of seting up on front baffle (1) internal diameter and backplate (2), front baffle (1), backplate (2), brush silk bundle (3), fixed connection (8) connect the installation and form brush ring section (6), threaded hole (5) have evenly been seted up on backplate (2) of brush ring section (6), brush ring section (6) are installed on stator (9) through threaded hole (5) and screw (10) on backplate (2), brush ring section (6) are constituteed brush ring (7) along the direction of brush silk installation angle, brush ring section (7) comprise N brush ring section (6), N is 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710945352.8A CN107630721B (en) | 2017-10-12 | 2017-10-12 | Equal-split circumference spliced brush type seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710945352.8A CN107630721B (en) | 2017-10-12 | 2017-10-12 | Equal-split circumference spliced brush type seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107630721A CN107630721A (en) | 2018-01-26 |
| CN107630721B true CN107630721B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710945352.8A Active CN107630721B (en) | 2017-10-12 | 2017-10-12 | Equal-split circumference spliced brush type seal |
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| CN (1) | CN107630721B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630208A (en) * | 2018-12-16 | 2019-04-16 | 中国航发沈阳发动机研究所 | A kind of tapered brush seal structure |
| CN109899526A (en) * | 2019-04-11 | 2019-06-18 | 广州市挂绿环保工程有限公司 | A kind of rotary sealing structure |
Citations (10)
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|---|---|---|---|---|
| WO2001055625A1 (en) * | 2000-01-31 | 2001-08-02 | General Electric Company | Self-centering brush seal |
| CN102900476A (en) * | 2012-09-21 | 2013-01-30 | 清华大学 | Low-leakage brush type sealing structure based on piezoelectric effect |
| CN203499823U (en) * | 2013-09-09 | 2014-03-26 | 中国航空动力机械研究所 | Brush type sealing device |
| CN204002941U (en) * | 2014-07-28 | 2014-12-10 | 江苏透平密封高科技有限公司 | Hide streaming brush steam seal |
| 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 |
| CN104806301A (en) * | 2015-04-03 | 2015-07-29 | 清华大学 | Non-contact fingertip-labyrinth-brush type combined sealer |
| CN205479337U (en) * | 2016-01-08 | 2016-08-17 | 沈阳航空航天大学 | Backplate has brush type sealing structure of annular boss |
| CN205744002U (en) * | 2016-06-27 | 2016-11-30 | 清华大学 | A kind of unidirectional labyrinth brush composite seal assembly |
| CN106246239A (en) * | 2016-07-29 | 2016-12-21 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of hybrid brush seals structure |
| CN106246240A (en) * | 2016-07-29 | 2016-12-21 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of brush seal structure |
-
2017
- 2017-10-12 CN CN201710945352.8A patent/CN107630721B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001055625A1 (en) * | 2000-01-31 | 2001-08-02 | General Electric Company | Self-centering brush seal |
| CN102900476A (en) * | 2012-09-21 | 2013-01-30 | 清华大学 | Low-leakage brush type sealing structure based on piezoelectric effect |
| CN203499823U (en) * | 2013-09-09 | 2014-03-26 | 中国航空动力机械研究所 | Brush type sealing device |
| CN204002941U (en) * | 2014-07-28 | 2014-12-10 | 江苏透平密封高科技有限公司 | Hide streaming brush steam seal |
| 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 |
| CN104806301A (en) * | 2015-04-03 | 2015-07-29 | 清华大学 | Non-contact fingertip-labyrinth-brush type combined sealer |
| CN205479337U (en) * | 2016-01-08 | 2016-08-17 | 沈阳航空航天大学 | Backplate has brush type sealing structure of annular boss |
| CN205744002U (en) * | 2016-06-27 | 2016-11-30 | 清华大学 | A kind of unidirectional labyrinth brush composite seal assembly |
| CN106246239A (en) * | 2016-07-29 | 2016-12-21 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of hybrid brush seals structure |
| CN106246240A (en) * | 2016-07-29 | 2016-12-21 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of brush seal structure |
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| Publication number | Publication date |
|---|---|
| CN107630721A (en) | 2018-01-26 |
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Inventor after: Wang Juan Inventor after: Liu Meihong Inventor after: Tan Yongfa Inventor after: Zhang Qin Inventor after: Wang Jixiang Inventor after: Wang Kaiqiang Inventor before: Liu Meihong Inventor before: Tan Yongfa Inventor before: Wang Juan Inventor before: Zhang Qin Inventor before: Wang Jixiang Inventor before: Wang Kaiqiang |
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