CN110159361B - Self-concentric two-stage brush type sealing structure with damping vibration attenuation function - Google Patents
Self-concentric two-stage brush type sealing structure with damping vibration attenuation function Download PDFInfo
- Publication number
- CN110159361B CN110159361B CN201910495984.8A CN201910495984A CN110159361B CN 110159361 B CN110159361 B CN 110159361B CN 201910495984 A CN201910495984 A CN 201910495984A CN 110159361 B CN110159361 B CN 110159361B
- Authority
- CN
- China
- Prior art keywords
- damping vibration
- stage brush
- piece
- vibration reduction
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000013016 damping Methods 0.000 title claims abstract description 73
- 238000007789 sealing Methods 0.000 title claims abstract description 73
- 230000009467 reduction Effects 0.000 claims abstract description 30
- 230000003068 static effect Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 18
- 230000006872 improvement Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/14—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing
- F01D11/16—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing by self-adjusting means
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/04—Antivibration arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a self-concentric two-stage brush type sealing structure with damping and vibration attenuation functions, which comprises the following components: the damping vibration reduction device comprises a stator, an annular sealing seat, a damping vibration reduction piece, a first-stage brush type sealing piece, a second-stage brush type sealing piece and a roller, wherein a groove with a T-shaped cross section is formed in the inner periphery of the stator, the annular sealing seat is matched with the groove, the damping vibration reduction pieces are multiple, the damping vibration reduction pieces are fixedly arranged along the outer periphery of the annular sealing seat and used for reducing vibration of radial runout of the annular sealing seat, the first-stage brush type sealing piece and the second-stage brush type sealing piece are fixed on the inner periphery of the annular sealing seat at intervals, the roller is multiple, and the damping vibration reduction pieces are rotatably arranged between the first-stage brush type sealing piece and the second-stage brush type sealing piece through a pin shaft. The two-stage brush type sealing structure has a certain damping vibration attenuation function, can perform self-concentric movement along with radial runout of the rotor, is suitable for the working condition of large-amplitude vibration of the rotor, and can effectively improve the sealing performance of the brush type seal and prolong the service life of the brush type seal.
Description
Technical Field
The invention relates to a two-stage brush type sealing structure, in particular to a self-concentric two-stage brush type sealing structure with damping and vibration attenuation functions.
Background
The brush type sealing device is widely applied to turbomachinery such as aeroengines, steam turbines and compressors, can keep excellent sealing capability while allowing transient non-concentricity between a stator and a stator, can improve unit efficiency, is not easy to destabilize a rotor, is one of key technologies for the development of modern advanced turbomachinery, and in addition, brush wires of the brush type sealing device form flexible contact with a rotor shaft, so that the vibration characteristic of a rotor system can be improved, and the running safety of the unit is ensured.
The brush seal is composed of a front baffle, a rear baffle and brush filament bundles clamped between the front baffle and the rear baffle and arranged tightly, and leakage of upstream gas is blocked by the adhesion of the brush filaments and the rotor, so that the sealing effect is achieved. The bearing capacity of the single-stage brush type seal is limited, the two-stage brush type seal is one of the common solutions of high-pressure seal, the two-stage brush type seal can obviously reduce leakage quantity, but in the actual working process, the large-amplitude and irregular vibration of a rotor of the two-stage brush type seal can cause the problems of larger leakage quantity, brush wire vibration, deformation, abrasion, fatigue fracture and the like, and the whole brush type seal structure can be damaged when serious, so that the whole brush type seal structure is invalid.
Therefore, how to make the two-stage brush seal have self-concentricity and have a certain damping function to improve the sealing effect of the brush seal and prolong the service life of the brush seal is a problem to be solved urgently.
Disclosure of Invention
In view of the above, the present invention aims to provide a self-concentric two-stage brush seal structure with damping function, so as to solve the problem that the brush seal structure is easy to fail due to the large vibration of the rotor in the existing two-stage brush seal structure.
The technical scheme provided by the invention is as follows: self-concentric two-stage brush seal structure with damping vibration reduction function includes: the damping vibration reduction device comprises a stator, an annular sealing seat, a damping vibration reduction piece, a first-stage brush type sealing piece, a second-stage brush type sealing piece and a roller, wherein the inner periphery of the stator is provided with a groove with a T-shaped cross section, the annular sealing seat is matched with the groove, the damping vibration reduction pieces are multiple and fixedly arranged along the outer periphery of the annular sealing seat and used for reducing radial runout of the annular sealing seat, the first-stage brush type sealing piece and the second-stage brush type sealing piece are fixed on the inner periphery of the annular sealing seat at intervals and used for realizing two-stage brush type sealing on a rotor, the roller is multiple and arranged between the first-stage brush type sealing piece and the second-stage brush type sealing piece at intervals through a pin shaft and can rotate on the pin shaft, when the rotor is static, a gap exists between the roller and the rotor, and when the rotor radially runout, the rotor pushes the roller to further drive the annular sealing seat and the damping vibration reduction piece to radially move and strike the inner periphery of the stator, and at the moment, the damping vibration reduction piece plays a role in damping.
Preferably, the periphery interval of annular seal seat is provided with the oil pocket, the top of oil pocket is connected with sealed lid, damping vibration attenuation spare including set up in spring, piston in the oil pocket and with piston fixed connection just stretches out sealed piston rod of lid, the free end of spring meets with the bottom of oil pocket, be provided with into oil check valve and play oily check valve on the piston, when the rotor is static, the spring is in compression state, oppression piston, makes it offset with sealed lid, and when the rotor takes place radial runout, the rotor promotes the cylinder, and then drives annular seal seat and damping vibration attenuation spare radial motion, and when the piston rod impacted the inner periphery of stator, damping vibration attenuation spare played dual damping vibration attenuation.
Further preferably, the sealing cover is in threaded connection with the top of the oil cavity.
Further preferably, the oil inlet check valve and the oil outlet check valve on each piston are multiple and are arranged at intervals along the circumferential direction of the piston.
Further preferably, the roller is connected with the pin shaft through a bearing.
It is further preferred that a sleeve is provided between the bearing and both the first stage brush seal and the second stage brush seal for preventing axial movement of the drum.
Further preferably, the number of the damping vibration absorbing pieces is 8-10, and the damping vibration absorbing pieces are fixedly arranged at equal intervals along the periphery of the annular sealing seat.
Further preferably, the rollers are arranged in one-to-one correspondence with the damping vibration absorbing pieces.
Further preferably, the radial movable range of the annular sealing seat is 3-4 mm.
Further preferably, the drum surface is provided with a wear resistant coating.
The self-concentric two-stage brush type sealing structure with the damping vibration attenuation function is simple in structure, convenient to assemble and disassemble, clear in installation steps and easy to control on the basis of not changing the basic structure composition of the traditional brush type sealing structure; compared with the traditional brush type sealing structure, the brush type sealing structure provided by the invention can jump along with the rotor, has a self-concentric function, can relieve the impact of the rotor on the brush type sealing structure, and has a damping and vibration-reducing function; the brush type sealing structure provided by the invention has the advantages that most parts used are standard parts, and the brush type sealing structure does not need to be independently designed and manufactured, so that the manufacturing process can be greatly simplified, and the use cost is reduced.
The self-concentric two-stage brush type sealing structure with the damping vibration attenuation function has a certain damping vibration attenuation function, can perform self-concentric movement following radial runout of the rotor, is suitable for the working condition of large-amplitude vibration of the rotor, and can effectively improve the sealing performance and the service life of brush type sealing.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 is a schematic view of an installation state structure of a self-concentric two-stage brush seal structure with damping function;
FIG. 2 is a schematic structural view of the self-concentric two-stage brush seal structure with damping function provided by the invention in a state of large-amplitude vibration of a rotor;
FIG. 3 is a partial schematic view of a seal ring;
Fig. 4 is a section A-A of fig. 3.
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 4, the technical scheme provided by the invention is as follows: self-concentric two-stage brush seal structure with damping vibration reduction function includes: the stator 1, the annular seal seat 2, the damping vibration damper 3, the first-stage brush seal 4, the second-stage brush seal 5 and the roller 6, wherein the inner periphery of the stator 1 is provided with grooves 11 with T-shaped cross sections, the annular seal seat 2 is matched and arranged in the grooves 11, the damping vibration damper 3 is a plurality of, is fixedly arranged along the outer periphery of the annular seal seat 2 and is used for damping radial runout of the annular seal seat 2, the first-stage brush seal 4 and the second-stage brush seal 5 are fixed on the inner periphery of the annular seal seat 2 at intervals and are used for realizing two-stage brush sealing on the rotor 7, the inter-stage distances of the first-stage brush seal and the second-stage brush seal are preferably 20-30 mm, the inter-stage distances of the first-stage brush seal and the second-stage brush seal are preferably 1.5-1.8 mm, the roller 6 is a plurality of, and is arranged between the first-stage brush seal 4 and the second-stage brush seal 5 at intervals through a pin shaft 8 and can rotate on the annular seal seat 8, and the radial runout of the rotor 7 and the roller 6 and the damping vibration damper 3 are driven to move when the rotor 7 and the rotor 3 are in a radial runout, and the damping vibration damper 3 is driven to move, and the damping vibration damper 3 is driven to the rotor and the radial runout.
The working principle of the self-concentric two-stage brush type sealing structure with the damping vibration attenuation function is as follows: when the rotor is jumped and impacted to the roller, the roller drives the annular sealing seat to jump along the radial direction, and simultaneously drives the damping vibration-reducing piece to jump, and when the damping vibration-reducing piece impacts the inner periphery of the stator, the damping force of the damping vibration-reducing piece can play a vibration-reducing effect on the annular sealing seat; when the rotor reduces the runout and is far away from the roller, the damping vibration reduction piece is restored to the original state, and in the whole process, the annular sealing seat performs self-concentric movement following the radial runout of the rotor.
The damping vibration absorbing member may be in various structures, as long as the vibration of the annular sealing seat can be reduced when the rotor jumps, as an improvement of the technical scheme, as shown in fig. 4, the outer periphery of the annular sealing seat 2 is provided with an oil cavity 21 at intervals, the top of the oil cavity 21 is connected with a sealing cover 22, preferably in threaded connection, the damping vibration absorbing member 3 comprises a spring 31, a piston 32 and a piston rod 33 fixedly connected with the piston 32 and extending out of the sealing cover 22, the free end of the spring 31 is connected with the bottom of the oil cavity 21, the piston 32 is provided with an oil inlet check valve 321 and an oil outlet check valve 322, when the rotor 7 is stationary, the spring 31 is in a compressed state, the piston 32 is pressed against the sealing cover 22, when the rotor 7 radially jumps, the rotor 7 pushes the roller 6, and then drives the annular sealing seat 2 and the damping vibration absorbing member 3 to radially move, and when the piston rod 33 strikes the inner periphery of the stator 1, the damping member 3 plays a dual damping vibration absorbing role through the spring and the piston, specifically: the spring will further compress, and hydraulic oil will get into between piston and the sealed lid through the oil feed check valve, and both play damping vibration reduction's effect jointly, and when the rotor reduces and beats to keep away from the cylinder, the spring elongates under the restoring force, and promotes the piston to get back to initial position, and at this moment, hydraulic oil gets back to the oil pocket lower part through the oil return check valve, and whole in-process, annular seal seat all is following the radial runout's of rotor from concentric motion.
As an improvement of the technical scheme, the oil inlet check valve 321 and the oil outlet check valve 322 on each piston 32 are multiple and are arranged at intervals along the circumferential direction of the piston 32.
As an improvement of the technical scheme, as shown in fig. 4, the roller 6 is connected with a pin shaft 8 through a bearing 9.
In order to ensure the axial stability of the roller, as an improvement of the technical scheme, as shown in fig. 4, a shaft sleeve 10 is arranged between the bearing 9 and the first-stage brush seal 4 and the second-stage brush seal 5, so as to prevent the roller 6 from moving along the axial direction.
As an improvement of the technical scheme, the number of the damping vibration reduction pieces 3 is 8-10, and the damping vibration reduction pieces are fixedly arranged at equal intervals along the periphery of the annular sealing seat 2.
As an improvement of the technical scheme, the rollers 6 are arranged in one-to-one correspondence with the damping vibration absorbing pieces 3.
As an improvement of the technical scheme, the radial movable range of the annular sealing seat 2 is 3-4 mm.
As an improvement of the technical proposal, the surface of the roller 6 is provided with a wear-resistant coating.
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 (8)
1. Self-concentric two-stage brush seal structure with damping vibration reduction function, its characterized in that includes: the stator (1), annular seal seat (2), damping vibration reduction piece (3), first-stage brush seal piece (4), second-stage brush seal piece (5) and cylinder (6), wherein, the inner periphery of stator (1) is provided with recess (11) that the tangent plane is T, annular seal seat (2) cooperation set up in recess (11), damping vibration reduction piece (3) are a plurality of, along the fixed setting of periphery of annular seal seat (2), be used for radial run-out vibration reduction to annular seal seat (2), first-stage brush seal piece (4) and second-stage brush seal piece (5) interval are fixed in the inner periphery of annular seal seat (2), be used for realizing two-stage brush seal to rotor (7), cylinder (6) are a plurality of, set up between first-stage brush seal piece (4) and second-stage brush seal piece (5) through round pin axle (8) interval, and can rotate on round pin axle (8), when the rotor is static, there is the clearance between cylinder (6) and rotor (7), when rotor (7) are in radial run-out, radial run-out vibration reduction takes place to take place for rotor (7) radial run-out vibration reduction piece (3), and damping vibration reduction piece (3) take place, radial run-out vibration reduction piece (3) take place, and damping vibration reduction piece (1) take place in the radial run-out, the annular sealing seat is characterized in that an oil cavity (21) is formed in the periphery of the annular sealing seat (2) at intervals, a sealing cover (22) is connected to the top of the oil cavity (21), the damping vibration reduction piece (3) comprises a spring (31), a piston (32) and a piston rod (33) fixedly connected with the piston (32) and extending out of the sealing cover (22), the free end of the spring (31) is connected with the bottom of the oil cavity (21), an oil inlet one-way valve (321) and an oil outlet one-way valve (322) are arranged on the piston (32), when the rotor (7) is static, the spring (31) is in a compressed state, the piston (32) is pressed to be propped against the sealing cover (22), when the rotor (7) radially jumps, the rotor (7) pushes the roller (6), the annular sealing seat (2) and the damping vibration reduction piece (3) are driven to radially move, and when the piston rod (33) collides the inner periphery of the stator (1), the damping double piece (3) plays a damping vibration reduction role, and the roller (6) is connected with the pin shaft (8) through a bearing (9).
2. The self-concentric two-stage brush seal with damping vibration attenuation as set forth in claim 1, wherein: the sealing cover (22) is in threaded connection with the top of the oil cavity (21).
3. The self-concentric two-stage brush seal with damping vibration attenuation as set forth in claim 1, wherein: the oil inlet check valve (321) and the oil outlet check valve (322) on each piston (32) are multiple and are arranged at intervals along the circumferential direction of the piston (32).
4. The self-concentric two-stage brush seal with damping vibration attenuation as set forth in claim 1, wherein: and shaft sleeves (10) are arranged between the bearings (9) and the first-stage brush type sealing element (4) and the second-stage brush type sealing element (5) and are used for preventing the roller (6) from moving along the axial direction of the roller.
5. The self-concentric two-stage brush seal with damping vibration attenuation as set forth in claim 1, wherein: the number of the damping vibration reduction pieces (3) is 8-10, and the damping vibration reduction pieces are fixedly arranged at equal intervals along the periphery of the annular sealing seat (2).
6. The self-concentric two-stage brush seal with damping vibration attenuation as set forth in claim 1, wherein: the rollers (6) are arranged in one-to-one correspondence with the damping vibration attenuation pieces (3).
7. The self-concentric two-stage brush seal with damping vibration attenuation as set forth in claim 1, wherein: the radial movable range of the annular sealing seat (2) is 3-4 mm.
8. The self-concentric two-stage brush seal with damping vibration attenuation as set forth in claim 1, wherein: the surface of the roller (6) is provided with a wear-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495984.8A CN110159361B (en) | 2019-06-10 | 2019-06-10 | Self-concentric two-stage brush type sealing structure with damping vibration attenuation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495984.8A CN110159361B (en) | 2019-06-10 | 2019-06-10 | Self-concentric two-stage brush type sealing structure with damping vibration attenuation function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110159361A CN110159361A (en) | 2019-08-23 |
| CN110159361B true CN110159361B (en) | 2024-05-28 |
Family
ID=67628012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910495984.8A Active CN110159361B (en) | 2019-06-10 | 2019-06-10 | Self-concentric two-stage brush type sealing structure with damping vibration attenuation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110159361B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483209B (en) * | 2021-12-27 | 2023-07-14 | 东方电气集团东方汽轮机有限公司 | Sealing structure of steam seal body at shaft end of steam turbine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5400952A (en) * | 1993-10-25 | 1995-03-28 | General Electric Company | Method and apparatus for damping a brush seal |
| US5568931A (en) * | 1992-08-20 | 1996-10-29 | General Electric Company | Brush seal |
| CN109555564A (en) * | 2019-01-25 | 2019-04-02 | 沈阳航空航天大学 | The brush seal structure of brush wire bundle Yu rotor cover radial clearance is adjusted containing magnet |
| CN210122924U (en) * | 2019-06-10 | 2020-03-03 | 沈阳航空航天大学 | Self-concentric two-stage brush type sealing structure with damping and vibration reduction functions |
-
2019
- 2019-06-10 CN CN201910495984.8A patent/CN110159361B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5568931A (en) * | 1992-08-20 | 1996-10-29 | General Electric Company | Brush seal |
| US5400952A (en) * | 1993-10-25 | 1995-03-28 | General Electric Company | Method and apparatus for damping a brush seal |
| CN109555564A (en) * | 2019-01-25 | 2019-04-02 | 沈阳航空航天大学 | The brush seal structure of brush wire bundle Yu rotor cover radial clearance is adjusted containing magnet |
| CN210122924U (en) * | 2019-06-10 | 2020-03-03 | 沈阳航空航天大学 | Self-concentric two-stage brush type sealing structure with damping and vibration reduction functions |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110159361A (en) | 2019-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108488059B (en) | A kind of compressor of air conditioner vibration damping maintenance process | |
| CN110159361B (en) | Self-concentric two-stage brush type sealing structure with damping vibration attenuation function | |
| CN101876302A (en) | Multi-cylinder reciprocating pump | |
| US20210404468A1 (en) | Scroll compressor and assembly method thereof | |
| JPS60113870A (en) | Shaft seal apparatus for rotary type fluid pressure apparatus | |
| CN100420884C (en) | Seal carrier for a rotary machine and improved method | |
| CN210122924U (en) | Self-concentric two-stage brush type sealing structure with damping and vibration reduction functions | |
| CN211449162U (en) | Bidirectional thrust sliding bearing for gas turbine | |
| JP2012530883A (en) | Crank circular slider block assembly and internal combustion engine and compressor using the same | |
| CN201318287Y (en) | Oil-free scroll compressor of anti-rotation and flexible mechanism | |
| CN110359967B (en) | High-pressure-difference-resistant brush type sealing device | |
| CN209671190U (en) | The split type drive mechanism of double-pump type hydraulic pump | |
| US6652244B2 (en) | Radial piston machine | |
| CN210422457U (en) | Piston suspension type down-the-hole hammer with static pressure support | |
| CN201705602U (en) | Multi-cylinder reciprocating pump | |
| CN210769652U (en) | Ultrahigh-pressure hydraulic pulse attenuation oil way of cylinder body in hydraulic breaking hammer | |
| CN219605541U (en) | Plunger pump with plunger roller integrated structure | |
| CN219549049U (en) | Plug-in type high-speed heavy-load miniature hydraulic plunger pump device | |
| CN110821873A (en) | Bidirectional thrust sliding bearing for gas turbine | |
| CN113279827B (en) | Steam turbine | |
| CN219412873U (en) | Plunger pump with DLC film coated on surface of plunger | |
| CN219866444U (en) | Forged steel axial flow type check valve | |
| CN221195582U (en) | Dual buffer hydraulic cylinder | |
| CN215927478U (en) | Combined blade top steam seal structure of steam turbine | |
| CN220726708U (en) | Piston with automatic exhaust function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |