CN110159361A - With damping vibration attenuation function from concentric two-stage brush seal structure - Google Patents
With damping vibration attenuation function from concentric two-stage brush seal structure Download PDFInfo
- Publication number
- CN110159361A CN110159361A CN201910495984.8A CN201910495984A CN110159361A CN 110159361 A CN110159361 A CN 110159361A CN 201910495984 A CN201910495984 A CN 201910495984A CN 110159361 A CN110159361 A CN 110159361A
- Authority
- CN
- China
- Prior art keywords
- brush seal
- vibration attenuation
- damping vibration
- concentric
- damping
- 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.)
- Granted
Links
- 238000013016 damping Methods 0.000 title claims abstract description 76
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 230000000694 effects Effects 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 230000003534 oscillatory effect Effects 0.000 abstract description 3
- 230000006870 function Effects 0.000 description 14
- 239000003921 oil Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- BDEDPKFUFGCVCJ-UHFFFAOYSA-N 3,6-dihydroxy-8,8-dimethyl-1-oxo-3,4,7,9-tetrahydrocyclopenta[h]isochromene-5-carbaldehyde Chemical compound O=C1OC(O)CC(C(C=O)=C2O)=C1C1=C2CC(C)(C)C1 BDEDPKFUFGCVCJ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004217 heart function Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010977 unit operation Methods 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 kind of with damping vibration attenuation function from concentric two-stage brush seal structure, it include: stator, ring sealing base, damping vibration attenuation part, first order brush seal, second level brush seal and roller, wherein, the inner circumferential of stator is provided with the T-shaped groove in section, ring sealing base is equipped in the groove, damping vibration attenuation part is multiple, it is fixedly installed along the periphery of ring sealing base, for the circular runout vibration damping to ring sealing base, the inner circumferential of ring sealing base is fixed at first order brush seal and second level brush seal interval, roller is multiple, it is rotatably dispose between first order brush seal and second level brush seal by pin shaft.The two-stage brush seal structure has the function of certain damping vibration attenuation, and the circular runout of rotor can be followed to do from concentric motion, suitable for the operating condition of rotor violent oscillatory motion, the seal performance of brush seal can be effectively improved, extend the service life of brush seal.
Description
Technical field
The present invention relates to two-stage brush seal structure, specifically provide it is a kind of with damping vibration attenuation function from concentric two-stage
Brush seal structure.
Background technique
Brush seal is widely used in the turbomachineries such as aero-engine, steam turbine, compressor, between allowing sound
Excellent sealability can be kept while transient state decentraction, unit efficiency not only can be improved, but also is not easy to make rotor unstability, be existing
It can change for one of the key technology of advanced turbomachinery development in addition, the brush filament of brush seal and armature spindle form flexible contact
The vibration characteristics of kind rotor-support-foundation system, guarantees the safety of unit operation.
Brush seal is by front apron, rear baffle and is sandwiched between the two and compact arranged brush wire bundle forms, and passes through brush filament
It is fitted with rotor to hinder the leakage of upstream gas, to achieve the effect that sealing.Single-stage brush seal bearing capacity is limited,
Two-stage brush seal is one of common solution of high pressure sealing, and two-stage brush seal can significantly reduce leakage rate, still,
In practical work process, the rotor of two-stage brush seal significantly, it is irregular vibration will lead to bigger leakage rate and brush
The problems such as silk flutter, deformation, abrasion, fatigue fracture, entire brush seal structure can be destroyed when serious, and then cause entire brush
Sealing structure failure.
Therefore, there is two-stage brush seal from concentric performance, and have the function of certain damping vibration attenuation, to improve
The service life of brush seal obturaged effect, extend brush seal, becomes people's urgent problem to be solved.
Summary of the invention
In consideration of it, the purpose of the present invention is to provide a kind of with damping vibration attenuation function from concentric two-stage brush seal knot
Structure is easy to lead to asking for brush seal structure failure because of the violent oscillatory motion of rotor to solve existing two-stage brush seal structure
Topic.
Present invention provide the technical scheme that with damping vibration attenuation function from concentric two-stage brush seal structure, comprising:
Stator, ring sealing base, damping vibration attenuation part, first order brush seal, second level brush seal and roller, wherein stator
Inner circumferential be provided with the T-shaped groove in section, ring sealing base is equipped in the groove, damping vibration attenuation part be it is multiple,
Be fixedly installed along the periphery of ring sealing base, for the circular runout vibration damping to ring sealing base, first order brush seal and
The inner circumferential of ring sealing base is fixed at second level brush seal interval, for realizing that two-stage brush seal, roller are to rotor
It is multiple, it is arranged at intervals between first order brush seal and second level brush seal by pin shaft, and can turn on pin shaft
Dynamic, when stationary rotor, there are gaps between the roller and rotor, and when circular runout occurs for rotor, rotor pushes roller,
And then drive ring sealing base and the radial motion of damping vibration attenuation part and hit stator inner circumferential, at this point, damping vibration attenuation part plays damping
Damping effect.
It is preferred that the periphery of the ring sealing base is arranged at intervals with oil pocket, sealing cover, institute are connected at the top of the oil pocket
Damping vibration attenuation part is stated to include the spring being set in the oil pocket, piston and be fixedly connected with the piston and stretch out sealing cover
Piston rod, the free end of the spring and the bottom connection of oil pocket are provided in line check valve and fuel-displaced unidirectional on the piston
Valve, when stationary rotor, spring is in compressive state, and forces piston makes it offset with sealing cover, when circular runout occurs for rotor
When, rotor pushes roller, and then drives ring sealing base and damping vibration attenuation part radial motion, when piston rod hits the inner circumferential of stator
When, damping vibration attenuation part plays Double damping damping effect.
Further preferably, the screw top of the sealing cover and oil pocket connects.
Further preferably, between the in line check valve on each piston and oil outlet one-way valve are multiple and the circumferential direction along piston
Every setting.
Further preferably, the roller is connect by bearing with pin shaft.
Further preferably, axis is provided between the bearing and first order brush seal and second level brush seal
Set, for preventing roller along its axial movement.
Further preferably, the damping vibration attenuation part is 8~10, and fixation is set at equal intervals along the periphery of ring sealing base
It sets.
Further preferably, the roller is arranged in a one-to-one correspondence with the damping vibration attenuation part.
Further preferably, the radially displaceable range of the ring sealing base is 3~4mm.
Further preferably, the cylinder surface is provided with wear-resistant coating.
It is provided by the invention with damping vibration attenuation function from concentric two-stage brush seal structure, structure is simple, do not changing
Become on the basis of traditional brush seal basic structure composition, convenient for handling, installation steps are clear, are easy to control；Relative to tradition
Brush seal structure, brush seal structure provided by the invention can follow rotor to beat, and have from same heart function, while may be used also
To alleviate shock of the rotor to brush seal structure, has the function of damping vibration attenuation；Brush seal structure provided by the invention makes
Part is largely standard component, does not need individually designed manufacture, can greatly simplify manufacturing process, reduces use cost.
It is provided by the invention with damping vibration attenuation function from concentric two-stage brush seal structure, there is certain damping to subtract
Vibration function can carry out following can effectively mentioning from concentric motion suitable for the operating condition of rotor violent oscillatory motion for rotor radial bounce
The seal performance and service life of high brush seal.
Detailed description of the invention
With reference to the accompanying drawing and embodiment the present invention is described in further detail:
Fig. 1 is the installation condition knot from concentric two-stage brush seal structure provided by the invention with damping vibration attenuation function
Structure schematic diagram；
Fig. 2 be it is provided by the invention with damping vibration attenuation function from concentric two-stage brush seal structure rotor significantly
Structural schematic diagram under vibrational state；
Fig. 3 is the partial schematic diagram of sealing ring；
Fig. 4 is the A-A sectional view of Fig. 3.
Specific embodiment
The present invention is further explained below in conjunction with specific embodiment, but the not limitation present invention.
As Figure 1-Figure 4, present invention provide the technical scheme that it is brush from concentric two-stage with damping vibration attenuation function
Sealing structure, comprising: stator 1, ring sealing base 2, damping vibration attenuation part 3, first order brush seal 4, second level brush seal
Part 5 and roller 6, wherein the inner circumferential of stator 1 is provided with the T-shaped groove 11 in section, and ring sealing base 2 is equipped in described
In groove 11, damping vibration attenuation part 3 be it is multiple, along ring sealing base 2 periphery be fixedly installed, for the diameter to ring sealing base 2
To bounce vibration damping, first order brush seal 4 and second level brush seal 5 are spaced the inner circumferential for being fixed on ring sealing base 2, use
In realizing two-stage brush seal to rotor 7, the grade spacing of first order brush seal and second level brush seal is preferably 20
~30mm is preferably welded with ring sealing base, and the brush filament thickness of first order brush seal and second level brush seal is excellent
Be selected as 1.5~1.8mm, roller 6 be it is multiple, first order brush seal 4 is arranged at intervals at by pin shaft 8 and the second level is brush close
It between sealing 5, and can be rotated on pin shaft 8, when stationary rotor, there are gaps between the roller 6 and rotor 7, when rotor 7
When circular runout occurs, rotor 7 pushes roller 6, and then drives ring sealing base 2 and 3 radial motion of damping vibration attenuation part and hit
1 inner circumferential of stator, at this point, damping vibration attenuation part 3 plays damping vibration attenuation function.
The working principle from concentric two-stage brush seal structure with damping vibration attenuation function is as follows: when rotor occurs greatly
Amplitude jitter and when hitting roller, roller will drive ring sealing base radially to beat, while damping vibration attenuation part being driven to beat, when
When damping vibration attenuation part hits stator inner circumferential, its own damping force will play effectiveness in vibration suppression to ring sealing base；It is jumped when rotor reduces
Dynamic, and when far from roller, damping vibration attenuation part is restored to reset condition, and in whole process, ring sealing base follows rotor diameter
To bounce from concentric motion.
Damping vibration attenuation part can be various structures, as long as the vibration of ring sealing base can be reduced when rotor is beated,
As the improvement of technical solution, as shown in figure 4, the periphery of the ring sealing base 2 is arranged at intervals with oil pocket 21, the oil pocket 21
Top be connected with sealing cover 22, be preferably threadedly coupled, the damping vibration attenuation part 3 includes the bullet that is set in the oil pocket 21
Spring 31, piston 32 and the piston rod 33 that sealing cover 22 is fixedly connected with and stretched out with the piston 32, the free end of the spring 31
With the bottom connection of oil pocket 21, in line check valve 321 and oil outlet one-way valve 322 are provided on the piston 32, when rotor 7 is static
When, spring 31 is in compressive state, and forces piston 32 makes it offset with sealing cover 22, when circular runout occurs for rotor 7, turns
Son 7 pushes roller 6, and then drives ring sealing base 2 and 3 radial motion of damping vibration attenuation part, when piston rod 33 is hit in stator 1
Zhou Shi, damping vibration attenuation part 3 play Double damping damping effect by spring and piston, and specifically: spring will compress further, liquid
Pressure oil will be entered between piston and sealing cover by line check valve, and the two plays the effect of damping vibration attenuation jointly, when rotor subtracts
Small bounce, and when separate roller, spring extends under restoring force, and piston is pushed to return to initial position, at this point, hydraulic oil passes through
Return check valve returns to oil pocket lower part, in whole process, ring sealing base follow that rotor radial beats from concentric motion.
As the improvement of technical solution, in line check valve 321 and oil outlet one-way valve 322 on each piston 32 are multiple
And being provided at circumferentially spaced along piston 32.
As the improvement of technical solution, as shown in figure 4, the roller 6 is connect by bearing 9 with pin shaft 8.
In order to guarantee the stability of roller axial direction, as the improvement of technical solution, as shown in figure 4, the bearing 9 and first
It is provided with axle sleeve 10 between grade brush seal 4 and second level brush seal 5, for preventing roller 6 along its axial movement.
As the improvement of technical solution, the damping vibration attenuation part 3 is 8~10, and between periphery of ring sealing base 2 etc.
Every fixed setting.
As the improvement of technical solution, the roller 6 is arranged in a one-to-one correspondence with the damping vibration attenuation part 3.
As the improvement of technical solution, the radially displaceable range of the ring sealing base 2 is 3~4mm.
As the improvement of technical solution, 6 surface of roller is provided with wear-resistant coating.
A specific embodiment of the invention is write according to progressive mode, and each embodiment is highlighted
Difference, similar portion can be with cross-reference.
Embodiments of the present invention are elaborated above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (10)
1. with damping vibration attenuation function from concentric two-stage brush seal structure characterized by comprising stator (1), annular are close
Seal seat (2), damping vibration attenuation part (3), first order brush seal (4), second level brush seal (5) and roller (6), wherein
The inner circumferential of stator (1) is provided with the T-shaped groove in section (11), and ring sealing base (2) is equipped in the groove (11),
Damping vibration attenuation part (3) be it is multiple, along ring sealing base (2) periphery be fixedly installed, for ring sealing base (2) radial direction jump
The inner circumferential of ring sealing base (2) is fixed at dynamic vibration damping, first order brush seal (4) and second level brush seal (5) interval,
For to rotor (7) realize two-stage brush seal, roller (6) be it is multiple, it is brush close that the first order is arranged at intervals at by pin shaft (8)
Between sealing (4) and second level brush seal (5), and it can be rotated on pin shaft (8), when stationary rotor, the roller (6)
There are gaps between rotor (7), and when circular runout occurs for rotor (7), rotor (7) pushes roller (6), and then drives annular
Seal receptacle (2) and (3) radial motion of damping vibration attenuation part simultaneously hit stator (1) inner circumferential, at this point, damping vibration attenuation part (3) plays damping
Damping effect.
2. it is described in accordance with the claim 1 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
The periphery of the ring sealing base (2) is arranged at intervals with oil pocket (21), is connected with sealing cover (22) at the top of the oil pocket (21),
The damping vibration attenuation part (3) include be set in the oil pocket (21) spring (31), piston (32) and with the piston (32)
It is fixedly connected with and stretches out the piston rod (33) of sealing cover (22), the free end of the spring (31) and the bottom phase of oil pocket (21)
It connects, is provided in line check valve (321) and oil outlet one-way valve (322) on the piston (32), when rotor (7) is static, spring
(31) it is in compressive state, forces piston (32) makes it offset with sealing cover (22), when circular runout occurs for rotor (7), turns
Sub (7) push roller (6), and then drive ring sealing base (2) and damping vibration attenuation part (3) radial motion, when piston rod (33) is hit
When hitting the inner circumferential of stator (1), damping vibration attenuation part (3) plays Double damping damping effect.
3. according to claim 2 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
The sealing cover (22) connect with the screw top of oil pocket (21).
4. according to claim 2 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
In line check valve (321) and oil outlet one-way valve (322) on each piston (32) are multiple and between the circumferential direction of piston (32)
Every setting.
5. it is described in accordance with the claim 1 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
The roller (6) is connect by bearing (9) with pin shaft (8).
6. according to claim 5 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
It is provided with axle sleeve (10), uses between the bearing (9) and first order brush seal (4) and second level brush seal (5)
In prevent roller (6) along its axial movement.
7. it is described in accordance with the claim 1 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
The damping vibration attenuation part (3) is 8~10, and is fixedly installed at equal intervals along the periphery of ring sealing base (2).
8. it is described in accordance with the claim 1 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
The roller (6) is arranged in a one-to-one correspondence with the damping vibration attenuation part (3).
9. it is described in accordance with the claim 1 with damping vibration attenuation function from concentric two-stage brush seal structure, it is characterised in that:
The radially displaceable range of the ring sealing base (2) is 3~4mm.
10. it is described in accordance with the claim 1 with damping vibration attenuation function from concentric two-stage brush seal structure, feature exists
In: roller (6) surface is provided with 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 true CN110159361A (en) | 2019-08-23 |
| CN110159361B 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483209A (en) * | 2021-12-27 | 2022-05-13 | 东方电气集团东方汽轮机有限公司 | Shaft end gland sealing structure 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483209A (en) * | 2021-12-27 | 2022-05-13 | 东方电气集团东方汽轮机有限公司 | Shaft end gland sealing structure of steam turbine |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110159361B (en) | 2024-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4772135A (en) | Bearing arrangement for the impellers of the compressor and the turbine in the turbine housing that are arranged next to one another on a shaft of a rotor shaft | |
| GB852618A (en) | Compressors having labyrinth-sealed unlubricated pistons | |
| JPS6362915A (en) | Bearing supporter | |
| CN110159361A (en) | With damping vibration attenuation function from concentric two-stage brush seal structure | |
| US4766932A (en) | Steam control valve | |
| CN210122924U (en) | Self-concentric two-stage brush type sealing structure with damping and vibration reduction functions | |
| CN109139796A (en) | A kind of fixed end seal formula squeeze film damper | |
| CN202040051U (en) | Reticular valve with self-elastic buffer plate | |
| CN110359967B (en) | High-pressure-difference-resistant brush type sealing device | |
| CN102889387A (en) | Graphite oil seal device | |
| CA2729261C (en) | Axial load damping system for rotor shaft | |
| CN205559355U (en) | Built -in axial force balancing unit's centrifugal pump of horizontal axis | |
| CN206929218U (en) | Energy-saving low-friction bearing retainer | |
| CN205478525U (en) | Can realize single -stage centrifugal pump of axial force self -balancing | |
| CN201818701U (en) | Oil seal device provided with guider for shock absorber | |
| CN209278135U (en) | Pump assembly and rotary compressor | |
| CN211231681U (en) | Ball valve rod | |
| CN220957093U (en) | Waterproof hammer structure of slow-closing check valve in pipeline system | |
| CN108571437A (en) | A kind of opposed type linear compressor piston | |
| CN2358232Y (en) | Double torsion complementary piston ring | |
| CN221144880U (en) | Hydraulic cylinder | |
| CN108518331A (en) | A kind of low abrasion compressor of oblique-plate-type air conditioner | |
| CN207514233U (en) | Pressure balance type packing ring | |
| CN215565738U (en) | Hydraulic oscillator for well drilling | |
| CN209671125U (en) | A kind of motorcycle foot startup structure |
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 |