CN109751091A - Brush seal installation - Google Patents
Brush seal installation Download PDFInfo
- Publication number
- CN109751091A CN109751091A CN201910053731.5A CN201910053731A CN109751091A CN 109751091 A CN109751091 A CN 109751091A CN 201910053731 A CN201910053731 A CN 201910053731A CN 109751091 A CN109751091 A CN 109751091A
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- baffle
- brush
- ring
- rotor
- brush filament
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- Sealing Devices (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The disclosure provides a kind of brush seal installation, is related to technical field of sealing technology.The brush seal installation of the disclosure includes mounting base, first baffle, second baffle and brush filament ring.Mounting base can be sheathed on a rotor；First baffle is fixed on the inner circumferential of mounting base, and can be sheathed on rotor；Second baffle is fixed on the inner circumferential of mounting base, and can be sheathed on rotor；Brush filament ring is held between first baffle and second baffle, and can be sheathed on rotor, and the inner peripheral surface of brush filament ring can cooperate with rotor seal, and the internal diameter of first baffle and second baffle is respectively less than the internal diameter of brush filament ring；First baffle and brush filament interannular are equipped with first cavity open towards rotor, and second baffle and brush filament interannular are equipped with second cavity open towards rotor, and the first cavity is symmetrical about brush filament ring with the second cavity.
Description
Technical field
This disclosure relates to technical field of sealing technology, in particular to a kind of brush seal installation.
Background technique
Brush seal is a kind of common sealing technique, commonly used in fields such as aero-engines, for preventing gas edge
Leaked from high side to low side around rotor.Existing brush seal installation generally comprise front apron, rear baffle and
Brush filament between front apron and rear baffle, brush filament can be contacted with rotor, in the eccentricity rotor movement of engine, be still able to maintain close
Envelope.
Currently, rear baffle is typically in the low-pressure side of air-flow, and front apron is in the high-pressure side of air-flow, can only bear unidirectional
Pressure difference so that rear baffle is in high-pressure side if the flow direction of air-flow changes, then brush seal brush filament easily deforms,
Influence its sealing performance.Meanwhile in the prior art, brush filament is bonded with rear baffle, after brush filament is deviated because of rotor radial movement,
Rear baffle makes brush filament be difficult to restore immediately the frictional force of brush filament, generates " brush filament lag " phenomenon, influences sealing effect.In addition,
Since the frictional force between brush filament and rear baffle can make brush filament rigidifying effect occur, accelerate the abrasion of brush filament and rotor, shortens brush
The service life of sealing.
It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The disclosure is designed to provide a kind of brush seal installation, can bear bidirectional pressure difference, and can guarantee sealing effect,
And it is conducive to extend service life.
According to one aspect of the disclosure, a kind of brush seal installation is provided, comprising:
Mounting base can be sheathed on a rotor；
First baffle is fixed on the inner circumferential of the mounting base, and can be sheathed on the rotor；
Second baffle is fixed on the inner circumferential of the mounting base, and can be sheathed on the rotor；
Brush filament ring is held between the first baffle and the second baffle, and can be sheathed on the rotor, described
The inner peripheral surface of brush filament ring can cooperate with the rotor seal, and the internal diameter of the first baffle and the second baffle is respectively less than described
The internal diameter of brush filament ring；
The first baffle and the brush filament interannular are equipped with first cavity open towards the rotor, the second baffle
It is equipped with second cavity open towards the rotor with the brush filament interannular, first cavity and second cavity are about institute
It is symmetrical to state brush filament ring.
In a kind of exemplary embodiment of the disclosure, the inner circumferential of the mounting base has a mounting groove of annular, and described the
One baffle, the brush filament ring and the second baffle are held between the side wall of the mounting groove.
In a kind of exemplary embodiment of the disclosure, the mounting base includes:
Mounting ring；
First annular part is fixed on the inner circumferential of the mounting ring；
Second annular element is fixed on the inner circumferential of the mounting ring, and is oppositely arranged with the first annular part, to be formed
State mounting groove.
In a kind of exemplary embodiment of the disclosure, the first annular part is an integral structure with the mounting ring,
Second annular element and the mounting ring are detachably connected.
In a kind of exemplary embodiment of the disclosure, the position that the mounting ring corresponds to second annular element is equipped with
The outer rim of card slot, second annular element is sticked in the card slot.
In a kind of exemplary embodiment of the disclosure, the internal diameter phase of the internal diameter of the first baffle and the second baffle
Together.
In a kind of exemplary embodiment of the disclosure, the first baffle is equipped with first close to the surface of the brush filament ring
Annular groove, first cavity by the first annular slot and the brush filament collar at；
The second baffle is equipped with the second annular groove close to the surface of the brush filament ring, and second cavity is by described second
Annular groove and the brush filament collar at.
In a kind of exemplary embodiment of the disclosure, the brush filament ring includes circumferentially distributed multiple brush wire bundles, each
The brush wire bundle includes bottom end and sealed end, and the mounting base is fixed in the bottom end, and it is close that the sealed end is equal to the rotor
Envelope cooperation；The brush wire bundle is obliquely installed with the radial centre lines for crossing its bottom end at 40 ° of -50 ° of angles.
In a kind of exemplary embodiment of the disclosure, the brush wire bundle includes multiple brush filaments, and the diameter of the brush filament is
0.05mm-0.08mm。
In a kind of exemplary embodiment of the disclosure, the first baffle, the brush filament ring and the second baffle are logical
Cross welding manner connection.
The brush seal installation of the disclosure can be fixed first baffle, brush filament ring and second baffle by mounting base,
It is contacted by brush filament ring with rotor, realizes sealing.Simultaneously as the presence of the first cavity and the second cavity, can reduce first gear
The contact surface of plate and second baffle and brush filament ring is conducive to reduce frictional force, to alleviate " brush filament lag " effect and rigidifying effect
It answers, improves sealing performance and service life.
At work, if first baffle is in high-pressure side, after high pressure draught enters the first cavity, air-flow and first baffle phase
Interaction generates vortex, reduces air-flow velocity, to achieve the purpose that decompression；If second baffle is in high-pressure side, due to first
Cavity is symmetrical about brush filament ring with the second cavity, and therefore, the second cavity can equally play the purpose of decompression, and with the first cavity
Effect of easing stress is identical.The brush seal installation of the disclosure can bear bidirectional pressure difference as a result, avoid becoming because differential-pressure airflow is reversed
Shape.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and together with specification for explaining the principles of this disclosure.It should be evident that the accompanying drawings in the following description is only the disclosure
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the partial assembled schematic diagram of disclosure embodiment brush seal installation.
Fig. 2 is the partial schematic diagram of disclosure embodiment brush seal installation.
Fig. 3 is the A-A cross-sectional view of brush seal installation in Fig. 2.
In figure: 1, mounting base；11, mounting ring；12, first annular part；13, the second annular element；2, first baffle；201,
One cavity；3, second baffle；301, the second cavity；4, brush filament ring；5, rotor.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures
On, or refer to that certain structure is " direct " and be arranged in other structures, or refer to that certain structure is arranged by the way that another structure is " indirect " in other knots
On structure.
Term "one", " one ", "the", " described " and "at least one" be to indicate that there are one or more elements/groups
At part/etc.；Term " comprising " and " having " is to indicate the open meaning being included and refer in addition to listing
Element/component part/also may be present except waiting other element/component part/etc.；Term " first ", " second " are only as mark
Note uses, and is not the quantity limitation to its object.
Disclosure embodiment provides a kind of brush seal installation, can be used for the needs such as aero-engine and realizes sealing
Mechanical device.As shown in Figure 1-Figure 3, the brush seal installation of disclosure embodiment may include mounting base 1, first baffle 2,
Two baffles 3 and brush filament ring 4, in which:
Mounting base 1 can be sheathed on a rotor 5.
First baffle 2 is securable to the inner circumferential of mounting base 1, and can be sheathed on rotor 5.
Second baffle 3 is securable to the inner circumferential of mounting base 1, and can be sheathed on rotor 5.
Brush filament ring 4 is can be clamped between first baffle 2 and second baffle 3, and can be sheathed on rotor 5, brush filament ring 4 it is interior
Circumferential surface can be sealed with rotor 5 to be cooperated, and the internal diameter of first baffle 2 and second baffle 3 is respectively less than the internal diameter of brush filament ring 4；
First cavity 201 open towards rotor 5, second baffle 3 and brush filament ring 4 are equipped between first baffle 2 and brush filament ring 4
Between be equipped with second cavity 301 open towards rotor 5, the first cavity 201 and the second cavity 301 about brush filament ring 4 symmetrically.
The brush seal installation of disclosure embodiment, can be by mounting base 1 to first baffle 2, brush filament ring 4 and second gear
Plate 3 is fixed, and is contacted by brush filament ring 4 with rotor 5, realizes sealing.Simultaneously as the first cavity 201 and the second cavity 301
Presence, the contact surface of first baffle 2 and second baffle 3 and brush filament ring 4 can be reduced, be conducive to reduce frictional force, to alleviate
" brush filament lag " effect and rigidifying effect improve sealing performance and service life.
At work, if first baffle 2 is in high-pressure side, after high pressure draught enters the first cavity 201, air-flow and first gear
The interaction of plate 2 generates vortex, reduces air-flow velocity, to achieve the purpose that decompression；If second baffle 3 is in high-pressure side, by
Symmetrical about brush filament ring 4 in the first cavity 201 and the second cavity 301, therefore, the second cavity 301 can equally play the mesh of decompression
, and effect of easing stress is identical as the first cavity 201.The brush seal installation of the disclosure can bear bidirectional pressure difference as a result, avoid because
Differential-pressure airflow is reversed and deforms.
Each section of disclosure embodiment brush seal installation is described in detail below:
As shown in Figure 1, mounting base 1 can be ring structure, and it can be sheathed on outside a rotor 5, the internal diameter of mounting base 1, which is greater than, to be turned
Son 5.The structure of the rotor 5 does not do particular determination herein, can be a shaft or other structures.For the ease of installing first gear
Plate 2, second baffle 3 and brush filament ring 4, the inner circumferential of mounting base 1 can be formed with mounting groove, first baffle 2, second baffle 3 and brush filament
Ring 4 can be stacked in the mounting groove, and be gripped by the side wall of mounting groove.
In one embodiment, as shown in Figure 1, mounting base 1 may include mounting ring 11, first annular part 12 and the second annular
Part 13, in which:
Mounting ring 11 can be ring structure, internal diameter, the i.e. diameter of inner peripheral surface, can with first baffle 2, second baffle 3 and
The outer diameter of brush filament ring 4 is identical, which can be sheathed on outside rotor 5.The cross section of mounting ring 11 can for rectangle, it is trapezoidal or its
Its shape.
First annular part 12 is securable to the inner circumferential of mounting ring 11, for example, first annular part 12 is integrated with mounting ring 11
Formula structure, i.e., first annular part 12 can be the annular ridge for protruding from the inner peripheral surface of mounting ring 11.Certainly, first annular part 12
The inner circumferential of mounting ring 11 can be fixed on by welding, being clamped or other means.
Second annular element 13 is securable to the inner circumferential of mounting ring 11, and is oppositely arranged with first annular part 12, first annular
Part 12, the second annular element 13 and mounting ring 11 can surround above-mentioned mounting groove.Second annular element 13 can be detachable by clamping etc.
Mode be fixedly connected with the inner circumferential of mounting ring 11, for example, can the inner circumferential of mounting ring 11 be equipped with annular card slot, second annular
The outer rim of part 13 is sticked in card slot.In assembly, first baffle 2, second baffle 3 and brush filament ring 4 can be layered in the first ring
After on shape part 12, then the second annular element 13 is installed, convenient for operation.Certainly, in the other embodiment of the disclosure, the second annular
Part 13 can also be an integral structure with mounting ring 11, can be connected by non-removable modes such as welding.
As shown in Figure 1-Figure 3, first baffle 2 can be ring structure, and outer diameter can be identical as the internal diameter of mounting base 1, so that
The periphery of first baffle 2 can be resisted against the inner circumferential of mounting base 1, and be fixedly connected with mounting base 1, for example, passing through peace above
Tankage clamps first baffle 2, second baffle 3 and brush filament ring 4, realizes the fixation to first baffle 2.The internal diameter of first baffle 2 is big
In the outer diameter of rotor 5, so as to be sheathed on outside rotor 5, and there can be gap between the inner circumferential of first baffle 2 and rotor 5.
As shown in figures 1 and 3, second baffle 3 can be ring structure, and outer diameter can be identical as the internal diameter of mounting base 1, so that
The periphery of second baffle 3 can be resisted against the inner circumferential of mounting base 1, and be fixedly connected with mounting base 1, for example, passing through peace above
Tankage clamps first baffle 2, second baffle 3 and brush filament ring 4, realizes the fixation to second baffle 3.The internal diameter of second baffle 3 is big
In the outer diameter of rotor 5, so as to be sheathed on outside rotor 5, and there can be gap between the inner circumferential of first baffle 2 and rotor 5.In addition,
The internal diameter of first baffle 2 can be identical as the internal diameter of first baffle 2, guarantees gap and the second baffle 3 of first baffle 2 and rotor 5
Of same size with the gap of rotor 5, when high-pressure side and low-pressure side are converted, the channel width that air-flow enters is identical.
As shown in Figure 1-Figure 3, brush filament ring 4 can be sheathed on rotor 5, and be held on first baffle 2 and second baffle 3 it
Between.The internal diameter of brush filament ring 4 can be greater than the internal diameter of first baffle 2 and second baffle 3, and the inner circumferential of brush filament ring 4 salable is matched with
The periphery of rotor 5, to realize sealing, the outer diameter of brush filament ring 4 can be identical as the internal diameter of mounting ring 11, so as to be resisted against mounting base
1 inner circumferential, and be fixedly connected with mounting base 1.Brush filament ring 4 may include multiple circumferentially distributed brush wire bundles, each brush wire bundle
With bottom end and sealed end, which is securable to the inner circumferential of mounting base 1, and sealed end can be sealed with rotor 5 to be cooperated.Each brush filament
The radial centre lines that Shu Keyu crosses the brush filament ring 4 of its bottom end are obliquely installed at 40 ° of -50 ° of angles, so that it is soft to improve brush filament beam bending
Degree and resilience, make brush wire bundle adapt to diametrically bounce and the eccentric motion of rotor 5, advantageously ensure that sealing effect.
Each brush wire bundle may include multiple brush filaments, and the inner circumferential of mounting base 1 is fixed in one end of each brush filament, and the other end can be with
Rotor 5 contacts.The diameter of each brush filament can be 0.05mm-0.08mm, flexible to improve under the premise of meeting intensity.Meanwhile
To adapt to higher speed and having the longer service life, brush filament selects nickel, chromium, aluminum-base high-temperature alloy, to bear higher temperature
Degree, such as bear 800 DEG C of temperature.
First baffle 2, brush filament ring 4 and second baffle 3 can be stacked, and can be connected by welding manner, to make three
Person becomes an entirety, is conducive to keep structure more firm, the technique of welding can be the welding procedures such as electron beam welding.In order to just
In welding, the relatively good nickel-base high-temperature alloy material of weldability is can be used in first baffle 2 and second baffle 3.
First cavity 201 open towards rotor 5, for example, first baffle 2 are equipped between first baffle 2 and brush filament ring 4
It is equipped with first annular slot towards the surface of brush filament ring 4, the inner edge of the first annular slot is the open architecture towards rotor 5, so as to
Air-flow enters first annular slot, and the first cavity 201 can be surrounded by brush filament ring 4 and first annular slot.
Second cavity 301 open towards rotor 5, for example, second baffle 3 are equipped between second baffle 3 and brush filament ring 4
It is equipped with the second annular groove towards the surface of brush filament ring 4, the inner edge of second annular groove is the open architecture towards rotor 5, so as to
Air-flow enters the second annular groove, and the second cavity 301 can be surrounded by brush filament ring 4 and the second annular groove.
As shown in figures 1 and 3, the first cavity 201 and the second cavity 301 can be symmetrical about brush filament ring 4, i.e. the first cavity
201 is identical as the shape and size of the second cavity 301, and mirror image is distributed in the two sides of brush filament ring 4, the first cavity 201 and second
The size of cavity 301 includes diameter and the width along axial direction, and the first cavity 201 is the bottom surface of the first annular groove along axial width
With brush filament ring 4 close to the spacing of the side of first baffle 2, the second cavity 301 along the bottom surface that axial width is the second annular groove with
For brush filament ring 4 close to the spacing of the side of second baffle 3, size above-mentioned is identical identical including diameter and along axial width phase
Together.High-pressure side is located at for first baffle 2 and second baffle 3 is located at low-pressure side, and, first baffle 2 is located at high-pressure side and
Two baffles 3 are located at low-pressure side both of these case, sealing can be achieved, that is to say, that can bear bidirectional pressure difference.
Specifically, at work, if first baffle 2 is in high-pressure side, after high pressure draught enters the first cavity 201, gas
Stream and the interaction of first baffle 2 generate vortex, hinder the flowing of gas, reduce the flowing kinetic energy of gas, produce throttling
Effect reduces air-flow velocity, to achieve the purpose that decompression.If second baffle 3 is in high-pressure side, first baffle 2 is in low pressure
Side equally can reach the purpose of decompression, and this will not be detailed here for concrete principle.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
Claims (10)
1. a kind of brush seal installation characterized by comprising
Mounting base can be sheathed on a rotor；
First baffle is fixed on the inner circumferential of the mounting base, and can be sheathed on the rotor；
Second baffle is fixed on the inner circumferential of the mounting base, and can be sheathed on the rotor；
Brush filament ring is held between the first baffle and the second baffle, and can be sheathed on the rotor, the brush filament
The inner peripheral surface of ring can cooperate with the rotor seal, and the internal diameter of the first baffle and the second baffle is respectively less than the brush filament
The internal diameter of ring；
The first baffle and the brush filament interannular are equipped with first cavity open towards the rotor, the second baffle and institute
It states brush filament interannular and is equipped with second cavity open towards the rotor, first cavity and second cavity are about the brush
Silk ring is symmetrical.
2. brush seal installation according to claim 1, which is characterized in that the inner circumferential of the mounting base has the peace of annular
Tankage, the first baffle, the brush filament ring and the second baffle are held between the side wall of the mounting groove.
3. brush seal installation according to claim 2, which is characterized in that the mounting base includes:
Mounting ring；
First annular part is fixed on the inner circumferential of the mounting ring；
Second annular element is fixed on the inner circumferential of the mounting ring, and is oppositely arranged with the first annular part, to form the peace
Tankage.
4. brush seal installation according to claim 3, which is characterized in that the first annular part is with the mounting ring
Integral structure, second annular element and the mounting ring are detachably connected.
5. brush seal installation according to claim 4, which is characterized in that the mounting ring corresponds to second annular
The position of part is equipped with card slot, and the outer rim of second annular element is sticked in the card slot.
6. brush seal installation according to claim 1, which is characterized in that the internal diameter of the first baffle and described second
The internal diameter of baffle is identical.
7. brush seal installation according to claim 1-6, which is characterized in that the first baffle is close to described
The surface of brush filament ring is equipped with first annular slot, first cavity by the first annular slot and the brush filament collar at；
The second baffle is equipped with the second annular groove close to the surface of the brush filament ring, and second cavity is by second annular
Slot and the brush filament collar at.
8. brush seal installation according to claim 1-6, which is characterized in that the brush filament ring includes circumferential point
Multiple brush wire bundles of cloth, each brush wire bundle include bottom end and sealed end, and the mounting base is fixed in the bottom end, described close
Sealing end is equal to the rotor seal and cooperates；The brush wire bundle is set with the radial centre lines for crossing its bottom end at 40 ° of -50 ° of angles inclinations
It sets.
9. brush seal installation according to claim 8, which is characterized in that the brush wire bundle includes multiple brush filaments, described
The diameter of brush filament is 0.05mm-0.08mm.
10. brush seal installation described in any one of -6 1 according to claim 1, which is characterized in that the first baffle, described
Brush filament ring is connected with the second baffle by welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910053731.5A CN109751091B (en) | 2019-01-21 | 2019-01-21 | Brush type sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910053731.5A CN109751091B (en) | 2019-01-21 | 2019-01-21 | Brush type sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109751091A true CN109751091A (en) | 2019-05-14 |
| CN109751091B CN109751091B (en) | 2022-04-01 |
Family
ID=66405996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910053731.5A Active CN109751091B (en) | 2019-01-21 | 2019-01-21 | Brush type sealing device |
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| Country | Link |
|---|---|
| CN (1) | CN109751091B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201898A (en) * | 2023-04-28 | 2023-06-02 | 势加透博(成都)科技有限公司 | Brush seal assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2182255A1 (en) * | 2008-11-04 | 2010-05-05 | Siemens Aktiengesellschaft | Brush ring seal for a turbo engine and turbo engine with a brush ring seal assembly |
| CN102425461B (en) * | 2011-12-27 | 2014-07-09 | 中国燃气涡轮研究院 | Low-hysteresis reeled and fixed brush type sealing device |
| CN204061890U (en) * | 2014-06-25 | 2014-12-31 | 中航商用航空发动机有限责任公司 | Combined sealing structure and motor |
| 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 |
-
2019
- 2019-01-21 CN CN201910053731.5A patent/CN109751091B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2182255A1 (en) * | 2008-11-04 | 2010-05-05 | Siemens Aktiengesellschaft | Brush ring seal for a turbo engine and turbo engine with a brush ring seal assembly |
| CN102425461B (en) * | 2011-12-27 | 2014-07-09 | 中国燃气涡轮研究院 | Low-hysteresis reeled and fixed brush type sealing device |
| CN204061890U (en) * | 2014-06-25 | 2014-12-31 | 中航商用航空发动机有限责任公司 | Combined sealing structure and motor |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201898A (en) * | 2023-04-28 | 2023-06-02 | 势加透博(成都)科技有限公司 | Brush seal assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109751091B (en) | 2022-04-01 |
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