CN109578087B - Brush type sealing structure suitable for rotor bidirectional rotation - Google Patents
Brush type sealing structure suitable for rotor bidirectional rotation Download PDFInfo
- Publication number
- CN109578087B CN109578087B CN201910025055.0A CN201910025055A CN109578087B CN 109578087 B CN109578087 B CN 109578087B CN 201910025055 A CN201910025055 A CN 201910025055A CN 109578087 B CN109578087 B CN 109578087B
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- Prior art keywords
- rotor
- way bearing
- small
- brush
- stator
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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
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a brush type sealing structure suitable for bidirectional rotation of a rotor, which comprises the following components: the device comprises a stator, four-point contact ball bearings, a front baffle, a fusion welding area, a rear baffle, brush filament bundles, belt wheels, small one-way bearings, large one-way bearings and a rotor, wherein the front baffle and the rear baffle are fixed through the fusion welding area, the root parts of the brush filament bundles are fixed on the fusion welding area, the free ends are attached to the rotor, the four-point contact ball bearings are fixed between the fusion welding area and the stator in an interference mode, the rear end of the rear baffle is vertically connected with an extending plate, the small one-way bearings, the belt wheels and the rotor are sequentially connected in a key mode, the large one-way bearings are connected between the stator and the extending plate in a key mode, the rotation directions allowed by the small one-way bearings and the large one-way bearings are opposite, and the rotation allowed by the small one-way bearings is the direction of forward rotation of the rotor. The brush type sealing structure is suitable for the bidirectional rotation of the rotor, can prevent the brush filament bundles from being damaged due to the reverse rotation of the rotor, and prolongs the service life of the brush filaments.
Description
Technical Field
The invention relates to a sealing structure applied to rotary machinery, in particular to a brush type sealing structure suitable for bidirectional rotation of a rotor.
Background
Brush seals are key components of rotary machines such as aircraft engines, steam turbines, compressors, and the like. Compared with the traditional labyrinth seal, the brush seal has good sealing property, can adapt to instantaneous radial deformation or eccentric movement of the rotor, and in addition, brush wires of the brush seal form flexible contact with the rotor, so that the vibration property of a rotor system can be improved, and the running safety of a unit is ensured, therefore, the brush seal is widely applied to rotary machines in the fields of aerospace, electric power, petrochemical industry and the like.
The brush type seal consists of a front panel, a rear panel and brush filament bundles formed by highly dense alloy fine metal wires clamped between the front panel and the rear panel, wherein the brush filament bundles have a certain inclination along the rotation direction of a rotor, the inclined brush filament bundles can allow the rotor to radially jump, after the brush type seal is in interference contact with the rotor, permanent performance loss can not occur like labyrinth seal and honeycomb seal, the brush filament bundles of the brush type seal are regularly arranged according to a certain inclination angle relative to the rotation direction of the rotor, abrasion of the brush filament bundles can be reduced, the brush filament bundles are more easily adapted to manufacturing errors, thermal deformation and the like of the rotor, and the brush filament bundles quickly rebound after the rotor is radially displaced in a moment, so that a sealing gap is kept unchanged. Research shows that the brush type seal is used as a contact type dynamic seal, and the flexibility of the brush filament bundles ensures that the brush filament bundles can present yielding property and following property when the rotor instantaneously jumps radially.
In general, brush filaments of brush seal form an inclination angle of 45 degrees with the surface of a rotor, the brush filaments are assembled with the surface of the rotor in an interference manner during installation, friction force is generated between brush filament bundles and the rotor due to the interference assembly, in actual use, the rotor is required to rotate unidirectionally, and once the rotor is reversed, the brush filaments are irreversibly damaged due to the huge friction force between the rotor and the brush filament bundles. At present, no reasonable solution is proposed for brush wire damage caused by rotor reversal.
Therefore, how to improve the existing brush type sealing structure, so that under the condition that the rotor is reversed, the brush filament bundles can be ensured to be intact, the service life of the brush filament is prolonged, and the use cost of the brush filament is reduced, and the brush type sealing structure becomes a problem to be solved urgently.
Disclosure of Invention
In view of the above, the present invention is directed to a brush seal structure suitable for bi-directional rotation of a rotor, so as to solve the problem that the brush wire is damaged when the rotor is reversed in the conventional brush seal structure.
The technical scheme provided by the invention is as follows: a brush seal structure adapted for bi-directional rotation of a rotor, comprising: the device comprises a stator, four-point contact ball bearings, a front baffle, a fusion welding area, a rear baffle, brush wire bundles, a belt pulley, a small one-way bearing, a large one-way bearing and a rotor, wherein the front baffle and the rear baffle are fixed through the fusion welding area, the root of the brush wire bundles is fixed on the fusion welding area, the free end is attached to the rotor, the four-point contact ball bearings are fixed between the fusion welding area and the stator in an interference mode, the rear end of the rear baffle is vertically connected with an extending plate, the periphery of the small one-way bearing is connected with the inner periphery of the extending plate, the inner periphery of the small one-way bearing is connected with the outer periphery of the belt pulley, the left side and the right side of the small one-way bearing are fixed through annular bosses and large C-shaped clamps on the extending plate and the stator, the allowable rotation directions of the small one-way bearing and the large one-way bearing are opposite, and the allowable rotation directions of the small one-way bearing are the direction of the rotor.
Preferably, the spokes of the belt wheel are provided with strip-shaped holes.
Further preferably, the pulleys, the small unidirectional bearings and the protruding plates are connected in a clearance manner.
Further preferably, annular bosses are oppositely arranged on the front baffle and the stator, and the four-point contact ball bearing is limited and arranged between the annular bosses.
Further preferably, the small C-shaped clamping ring is embedded in a groove extending out of the inner side of the plate, and the large C-shaped clamping ring is embedded in a groove in the inner side of the stator.
The brush type sealing structure suitable for the bidirectional rotation of the rotor does not change the local structure of the traditional brush type sealing, designs the traditional brush type sealing structure into the brush type sealing structure suitable for the bidirectional rotation of the rotor, and has the following advantages:
1. the structure is simple, the basic structure composition of the traditional brush type seal is not changed, and the sealing structure is suitable for the bidirectional rotation of the rotor through the mutual matching of the large unidirectional bearing, the small unidirectional bearing, the belt pulley and the four-point contact ball bearing;
2. by utilizing the characteristic that the four-point contact ball bearing can bear bidirectional axial force, the four-point contact ball bearing is fixed between a fusion welding area and a stator in an interference manner, and can bear axial force formed by air flow pressure difference at the left side and the right side of the sealing structure.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 is a schematic view of a brush seal structure for bi-directional rotor rotation according to the present invention;
fig. 2 is a side view of the pulley;
FIG. 3 is a cut-away view of a pulley;
FIG. 4 is a schematic structural view of a large C-shaped snap ring;
fig. 5 is an enlarged view of the small one-way bearing and pulley portion.
In the figure, 1-stator; 2-four point contact ball bearings; 3-front baffle; 4-fusion welding zone; 5-a tailgate; 6-brushing the filament bundles; 7-pulleys; 8-small unidirectional bearings; 9-large one-way bearings; 10-rotor; 11-small C-shaped clasp; 12-large C-shaped clamping ring; 51-projecting plate; 71-band-shaped holes.
Detailed Description
The invention will be further explained below in connection with specific embodiments, but is not limited to the invention.
As shown in fig. 1 to 5, the present invention provides a brush seal structure suitable for bi-directional rotation of a rotor, comprising: the device comprises a stator 1, a four-point contact ball bearing 2, a front baffle 3, a fusion welding area 4, a rear baffle 5, a brush wire bundle 6, a belt pulley 7, a small one-way bearing 8, a large one-way bearing 9 and a rotor 10, wherein the front baffle 3 and the rear baffle 5 are fixed through the fusion welding area 4, the root of the brush wire bundle 6 is fixed on the fusion welding area 4, the free end is attached to the rotor 10, the four-point contact ball bearing 2 is fixed between the fusion welding area 4 and the stator 1 in an interference manner, the rear end of the rear baffle 5 is vertically connected with an extension plate 51, the outer periphery of the small one-way bearing 8 is connected with the inner periphery of the extension plate 51, the inner periphery of the small one-way bearing 8 is connected with the outer periphery of the belt pulley 7 through an annular boss and a small C-shaped clamping ring 11 on the extension plate 51, the inner periphery of the belt pulley 7 is connected with the outer periphery of the rotor 10, the outer periphery of the large one-way bearing 9 is connected with the inner periphery of the extension plate 1, the inner periphery of the large one-way bearing 9 is connected with the outer periphery of the extension plate 51 through the annular boss and the large one-way bearing 12 on the stator 1, and the small one-way bearing 8 is allowed to rotate in the opposite directions of rotation of the large one-way bearing 8 and the small one-way bearing 8 is allowed to rotate in the opposite directions.
Compared with the traditional brush type sealing structure suitable for the bidirectional rotation of the rotor, the brush type sealing structure is added with the large one-way bearing, the small one-way bearing, the four-point contact ball bearing and the belt pulley on the premise of ensuring the simple processing process, when the rotor rotates positively, the large one-way bearing cannot rotate positively, so that the extending plate connected with the large one-way bearing cannot rotate, and further the brush type sealing piece consisting of the front baffle, the fusion welding area, the rear baffle and the brush filament bundles is ensured to be kept still; when the rotor is reversed, the small one-way bearing can not be reversed, so that the rotor drives the belt wheel, the small one-way bearing and the extending plate, and further drives the brush sealing piece composed of the front baffle, the fusion welding area, the rear baffle and the brush filament bundles to be reversed synchronously, and the brush filament bundles are kept relatively static with the rotor all the time in the process of reversing the rotor, so that the brush filament bundles are prevented from being damaged due to the reverse rotation of the rotor, the service life of the brush filament is prolonged, and in addition, the four-point contact ball bearing can resist the axial force formed by the front-back air flow pressure difference of the sealing structure, and the one-way bearing is protected.
As an improvement of the technical scheme, as shown in fig. 2 and 3, the spoke of the belt wheel 7 is provided with a strip-shaped hole 71, and the strip Kong Liyu dissipates heat generated by rotor rotation friction, so that the service life of the brush seal is prolonged.
As an improvement of the technical scheme, the belt wheel 7, the small one-way bearing 8 and the extending plate 51 are connected in a clearance way, so that heat dissipation is facilitated, and damage caused by direct attaching contact among components is avoided.
As an improvement of the technical scheme, as shown in fig. 1 and 2, annular bosses are oppositely arranged on the front baffle plate 3 and the stator 1, and the four-point contact ball bearing 2 is limited between the annular bosses.
As an improvement of the technical scheme, as shown in fig. 1 and fig. 2, the small C-shaped snap ring 11 is embedded into a groove on the inner side of the extending plate 51, and the large C-shaped snap ring 12 is embedded into a groove on the inner side of the stator 1 and is respectively used for fixing the small unidirectional bearing and the large unidirectional bearing, wherein fig. 4 is a schematic structural diagram of the large C-shaped snap ring, and the structures of the small C-shaped snap ring and the large C-shaped snap ring are the same.
The embodiments of the invention have been written in an incremental manner with emphasis on the differences between the various embodiments being placed upon which similar parts may be seen.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (3)
1. Brush seal structure suitable for rotor bidirectional rotation, characterized by comprising: the device comprises a stator (1), a four-point contact ball bearing (2), a front baffle (3), a fusion welding area (4), a rear baffle (5), a brush wire bundle (6), a belt pulley (7), a small one-way bearing (8), a large one-way bearing (9) and a rotor (10), wherein the front baffle (3) and the rear baffle (5) are fixed through the fusion welding area (4), the root of the brush wire bundle (6) is fixed on the fusion welding area (4), the free end is attached to the rotor (10), the four-point contact ball bearing (2) is fixed between the fusion welding area (4) and the stator (1) in an interference manner, the rear end of the rear baffle (5) is vertically connected with an extension plate (51), the outer periphery of the small one-way bearing (8) is connected with the inner periphery of the extension plate (51), the inner periphery of the small one-way bearing (8) is connected with the outer periphery of the belt pulley (7), the left side and the right side of the small one-way bearing (8) are fixed through an annular boss on the extension plate (51) and a small C-shaped clamp ring (11), the inner periphery of the belt pulley (7) is connected with the outer periphery of the rotor (10) and the large one-way bearing (9) is connected with the outer periphery of the large one-way key (9) of the large one-way bearing (1), the left and right sides of big one-way bearing (9) are fixed through stretching out annular boss and big C type snap ring (12) on board (51) and stator (1), little one-way bearing (8) and big one-way bearing (9) permit the rotation opposite direction, and little one-way bearing (8) permit turn to the direction of rotor (10) corotation, open on the spoke of band pulley (7) has banded hole (71), gap connection between band pulley (7), little one-way bearing (8) and the stretching out board (51).
2. A brush seal structure adapted for bi-directional rotation of a rotor as defined in claim 1 wherein: annular bosses are oppositely arranged on the front baffle (3) and the stator (1), and the four-point contact ball bearing (2) is limited between the annular bosses.
3. A brush seal structure adapted for bi-directional rotation of a rotor as defined in claim 1 wherein: the small C-shaped clamping ring (11) is embedded into a groove on the inner side of the extending plate (51), and the large C-shaped clamping ring (12) is embedded into a groove on the inner side of the stator (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910025055.0A CN109578087B (en) | 2019-01-11 | 2019-01-11 | Brush type sealing structure suitable for rotor bidirectional rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910025055.0A CN109578087B (en) | 2019-01-11 | 2019-01-11 | Brush type sealing structure suitable for rotor bidirectional rotation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109578087A CN109578087A (en) | 2019-04-05 |
| CN109578087B true CN109578087B (en) | 2023-08-29 |
Family
ID=65916238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910025055.0A Active CN109578087B (en) | 2019-01-11 | 2019-01-11 | Brush type sealing structure suitable for rotor bidirectional rotation |
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| Country | Link |
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| CN (1) | CN109578087B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263442A (en) * | 2010-05-28 | 2011-11-30 | 尤洛考普特公司 | Electrical power supply and control device for equipment of a rotor, and an aircraft fitted with such a device |
| CN102352791A (en) * | 2011-10-13 | 2012-02-15 | 芜湖杰锋汽车动力系统有限公司 | Mechanical supercharger structure with speed-changing function |
| CN105443161A (en) * | 2015-12-31 | 2016-03-30 | 沈阳航空航天大学 | Self-concentric brush seal structure with rotor provided with discs |
| CN205744002U (en) * | 2016-06-27 | 2016-11-30 | 清华大学 | A kind of unidirectional labyrinth brush composite seal assembly |
| CN107725126A (en) * | 2017-08-23 | 2018-02-23 | 佛山市轩宸机电设备有限公司 | A kind of steam turbine electromagnetic type hydraulic turning gear |
| CN109057879A (en) * | 2018-08-08 | 2018-12-21 | 永康市翌阳科技有限公司 | A kind of steam turbine blade support arrangement of automation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040217549A1 (en) * | 2003-05-01 | 2004-11-04 | Justak John F. | Hydrodynamic brush seal |
-
2019
- 2019-01-11 CN CN201910025055.0A patent/CN109578087B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263442A (en) * | 2010-05-28 | 2011-11-30 | 尤洛考普特公司 | Electrical power supply and control device for equipment of a rotor, and an aircraft fitted with such a device |
| CN102352791A (en) * | 2011-10-13 | 2012-02-15 | 芜湖杰锋汽车动力系统有限公司 | Mechanical supercharger structure with speed-changing function |
| CN105443161A (en) * | 2015-12-31 | 2016-03-30 | 沈阳航空航天大学 | Self-concentric brush seal structure with rotor provided with discs |
| CN205744002U (en) * | 2016-06-27 | 2016-11-30 | 清华大学 | A kind of unidirectional labyrinth brush composite seal assembly |
| CN107725126A (en) * | 2017-08-23 | 2018-02-23 | 佛山市轩宸机电设备有限公司 | A kind of steam turbine electromagnetic type hydraulic turning gear |
| CN109057879A (en) * | 2018-08-08 | 2018-12-21 | 永康市翌阳科技有限公司 | A kind of steam turbine blade support arrangement of automation |
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| Publication number | Publication date |
|---|---|
| CN109578087A (en) | 2019-04-05 |
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