CN208519179U - Seal assembly for rotary machine - Google Patents
Seal assembly for rotary machine Download PDFInfo
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- CN208519179U CN208519179U CN201820672465.5U CN201820672465U CN208519179U CN 208519179 U CN208519179 U CN 208519179U CN 201820672465 U CN201820672465 U CN 201820672465U CN 208519179 U CN208519179 U CN 208519179U
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Abstract
The utility model discloses a kind of seal assemblies for rotary machine, the rotary machine includes quiet body and rotor, the seal assembly includes brush seal component, honeycomb seal component and Finger seal component, the brush seal component, the honeycomb seal component and the Finger seal component are suitable for being located on the quiet body, the brush seal component and the Finger seal component are alternately arranged along the axial direction of the rotor, the honeycomb seal component is located between the brush seal component and the Finger seal component and opposite with the sealing tooth on the surface for being located at the rotor, the honeycomb seal component and the sealing tooth constitute labyrinth seal.The utility model is used for the seal assembly of rotary machine, has good sealing effect, and long service life, required sealing space is small, improves applicability.
Description
Technical field
The utility model relates to technical field of sealing technology, more particularly to a kind of seal assembly for rotary machine.
Background technique
It usually requires to be sealed fluid in the rotary machine of the compressor or turbine of gas turbine etc., be let out with reducing
Leakage, guarantees the normal work of rotary machine.In the related technology, between the compressor of gas turbine or the grade of the component in turbine and axis
End is it is generally necessary to which setting is multi-stage sealed, to reach sealing effect by expansion, throttling and the process being depressured.
However, the series that existing sealing needs is more, required sealing space is big, and applicability is low, and due between sealing
Gap is small, is easy to produce fretting wear, influences the service life of sealing element, reduces sealing effect.
Utility model content
For this purpose, the seal assembly has good close the utility model proposes a kind of seal assembly for rotary machine
Effect is sealed, long service life, required sealing space is small, improves applicability.
According to the seal assembly for rotary machine of the utility model embodiment, the rotary machine includes quiet body and turns
Kinetoplast, the seal assembly include brush seal component, honeycomb seal component and Finger seal component, the brush seal portion
Part, the honeycomb seal component and the Finger seal component are suitable for being located on the quiet body, the brush seal component and institute
The axial direction that Finger seal component is stated along the rotor is alternately arranged, and the honeycomb seal component is located at the brush seal component
It is between the Finger seal component and opposite with the sealing tooth on the surface for being located at the rotor, the honeycomb seal component
Labyrinth seal is constituted with the sealing tooth.
It is close by brush seal component, finger tip according to the seal assembly for rotary machine of the utility model embodiment
The effective arrangement for sealing component and Finger seal component can fast implement throttling, decompression, have good sealing effect, and
Long service life, required sealing space is small, can be suitable for sealing space constrained environment, improve applicability.
In some embodiments, the brush seal component and the rotor radially have the in the rotor
One gap, the Finger seal component and the rotor radially have the second gap, the honeycomb the rotor
Seal member radially has third space in the rotor with the rotor, and the third space is greater than described first
Gap and second gap.
In some embodiments, first gap is 0.1mm~0.5mm；Second gap be 0.05mm~
0.3mm。
In some embodiments, the honeycomb seal component is in the gap radially of the quiet body with the sealing tooth
0.5mm~1mm.
In some embodiments, thickness of the seal assembly in the axial direction of the quiet body is no more than 50mm.
In some embodiments, thickness of the brush seal component in the axial direction is no more than 2mm, and the honeycomb is close
It seals thickness of the component in the axial direction and is no more than 20mm.
In some embodiments, the sealing tooth longitudinal section is in rectangle or triangle.
In some embodiments, the brush seal component includes the first brush seal component and the second brush seal portion
Part, the honeycomb seal component include the first honeycomb seal component and the second honeycomb seal component, and the Finger seal component is set
Between the first brush seal component and the second brush seal component, the first honeycomb seal component is set to described
Between first brush seal component and the Finger seal component, the second honeycomb seal component is set to the Finger seal portion
Between part and the second brush seal component.
In some embodiments, the Finger seal component is located at the first brush seal component and described second brush
The middle position of seal member.
In some embodiments, the Finger seal component includes the first Finger seal component and the second Finger seal portion
Part, the honeycomb seal component include the first honeycomb seal component and the second honeycomb seal component, and the brush seal component is set
Between the first Finger seal component and the second Finger seal component, the first honeycomb seal component is set to described
Between first Finger seal component and the brush seal component, the second honeycomb seal component is set to the brush seal portion
Between part and the second Finger seal component.
In some embodiments, the brush seal component is located at the first Finger seal component and second finger tip
The middle position of seal member.
In some embodiments, a honeycomb seal component corresponds to multiple sealing teeth.
Detailed description of the invention
Fig. 1 is the seal assembly for rotary machine according to the utility model one embodiment.
Fig. 2 be according to the utility model another embodiment the seal assembly for rotary machine.
Appended drawing reference:
Seal assembly 100, brush seal component 1, the first brush seal component 11, the second brush seal component 12, honeycomb
Seal member 2, the first honeycomb seal component 21, the second honeycomb seal component 22, Finger seal component 3, the first Finger seal portion
Part 31, the second Finger seal component 32 seal tooth 4, quiet body 200, rotor 300.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings.Below by
The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and should not be understood as practical new to this
The limitation of type.In the description of the present invention, it should be understood that term " center ", " length ", " width ", " thickness ",
The orientation or positional relationship of the instructions such as "inner", "outside", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure or position
Relationship is set, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning
It must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
As shown in Figs. 1-2, according to the seal assembly for rotary machine of the utility model embodiment, wherein turn-around machine
Tool includes quiet body 200 and rotor 300, and specifically, quiet body 200 is arranged around the periphery of rotor 300, and rotor 300 exists
It can be rotated around the axis of rotor 300 in quiet body 200, seal assembly 100 is for sealing quiet body 200 and rotor 300.Its
In, rotary machine such as gas turbine, gas turbine includes casing and shaft, shaft be located in casing and in casing around the shaft
Axis can be rotated, which is rotor 300, and the casing can be quiet body 200, be also possible to casing innate need of the economy sealing
Position setting sealing matrix, which is connected with the inner wall of casing and is looped around the periphery of shaft, then the sealing matrix
For quiet body 200.
Seal assembly 100 includes brush seal component 1, honeycomb seal component 2 and Finger seal component 3, brush seal portion
Part 1, honeycomb seal component 2 and Finger seal component 3 are suitable for being located on quiet body 200.Here, " it is suitable for " being seal assembly 100
When being specifically located on rotary machine, brush seal component 1, honeycomb seal component 2 and Finger seal component 3 are located at quiet body 200
On, that is, indicate under specific application environment can the meaning, for example, brush seal component 1, the honeycomb of seal assembly 100 are close
Envelope component 2 and Finger seal component 3 are located on the sealing matrix on casing or in casing.Specifically, brush seal component 1,
Honeycomb seal component 2 and Finger seal component 3 are located at the inner peripheral surface of quiet body 200.
Brush seal component 1 and Finger seal component 3 are alternately arranged along the axial direction of rotor 300, and honeycomb seal component 2 is set
Between brush seal component 1 and Finger seal component 3 and be located at rotor 300 surface on sealing tooth 4 it is opposite, honeycomb
Seal member 2 and sealing tooth 4 constitute labyrinth seal.
In other words, in the axial direction of rotor 300, brush seal component 1 and Finger seal component 3 replace and are spaced cloth
It sets, honeycomb seal component 2 is located at the interval location between brush seal component 1 and Finger seal component 3, rotor 300
The outer peripheral surface opposite with quiet body 200 be equipped with sealing tooth 4, sealing tooth 4 and honeycomb seal component 2 rotor 300 radially
It is oppositely arranged and constitutes labyrinth seal.Further, the both ends of honeycomb seal component 2 respectively with brush seal component 1 and refer to
A connection in sharp seal member 3.
It is understood that forming gap and consumption between sealing tooth 4 and quiet body 200 in labyrinth seal on rotor 300
Space is dissipated, when fluid is by gap, the partial pressure of the segment fluid flow can be converted into speed energy, and speed can be immediately in the sky that dissipates
It is thermal energy that effect in chamber due to turbulent eddy and skin friction drag, which dissipates, since the fluid of process generates throttling and thermodynamics
The pressure of effect, the segment fluid flow gradually decreases, to achieve the effect that sealing.
More specifically, seal assembly 100 in the casing of gas turbine for having and being used as rotor 300 in gas turbine
Shaft, shaft in casing can axis rotation around the shaft, be additionally provided with the sealing matrix for being looped around shaft periphery in casing,
The outer peripheral surface of sealing matrix is connected with casing inner surface, and sealing matrix is equipped with brush seal component 1,2 and of honeycomb seal component
Finger seal component 3, shaft is equipped with the sealing tooth 4 opposite with honeycomb seal component 2, close between casing and shaft to realize
Envelope.It is understood that the utility model is not limited to this, for example, without sealing matrix, brush seal between casing and shaft
Component 1, honeycomb seal component 2 and Finger seal component 3 are directly arranged on casing inner surface, and shaft is equipped with and honeycomb seal portion
The opposite sealing tooth of part 2, to realize the sealing between casing and shaft.It is understood that by being arranged in the gas turbine
The seal assembly of above structure can be improved the reliability of gas turbine.
It is close by brush seal component, finger tip according to the seal assembly for rotary machine of the utility model embodiment
The effective arrangement for sealing component and Finger seal component can fast implement throttling, decompression, have good sealing effect, and
Long service life, required sealing space is small, easy for installation, can be suitable for sealing space constrained environment, improve applicable
Property.
In some embodiments, brush seal component 1 radially has the first gap in quiet body 200 with rotor 300,
Finger seal component 3 and rotor 300 have the second gap radially, and honeycomb seal component 2 and rotor 300 are radially
With third space, third space is greater than the first gap and the second gap.In other words, brush seal component 1, honeycomb seal component
2 and between Finger seal component 3 has between rotor 300 in the radial direction of quiet body 200 (i.e. the radial direction of rotor 300)
Gap, and gap in the radial direction is greater than brush seal component 1 and rotor 300 between honeycomb seal component 2 and rotor 300
Between gap in the radial direction, gap in the radial direction is also greater than Finger seal portion between honeycomb seal component 2 and rotor 300
Gap in the radial direction between part 3 and rotor 300.Here, gap is the inner surface and rotor 300 of corresponding seal member
Outer surface distance in the radial direction.In addition, term " first ", " second ", " third " are used for description purposes only, and should not be understood as
Indication or suggestion relative importance or the quantity for implicitly indicating indicated technical characteristic." first ", " are defined as a result,
Two ", the feature of " third " can explicitly or implicitly include at least one of the features.
Further, the first gap is 0.1mm~0.5mm；Second gap is 0.05mm~0.3mm.In other words, brush close
Gap in the radial direction between component 1 and rotor 300 is sealed in the range of 0.1mm~0.5mm, Finger seal component 3 and rotation
The range of gap in the radial direction in 0.05mm~0.3mm between body 300.More specifically, honeycomb seal component 2 and sealing tooth 4
Gap in the radial direction is 0.5mm~1mm, and in other words, the inner surface of honeycomb seal component 2 and the outer surface of sealing tooth 4 are in diameter
Upward gap is in 0.5mm~1mm range.
In some embodiments, thickness of the seal assembly in the axial direction of quiet body 200 is no more than 50mm, specifically, brush
The thickness of seal member 1 in the axial direction is no more than 2mm, and thickness of the honeycomb seal component in the axial direction is no more than 20mm.It can
With understanding, by doing specific design to brush seal component 1, honeycomb seal component 2 and Finger seal component 3, further
It is capable of the radial clearance of lesser control sealing, reduces amount of leakage, improve sealing effect.
In some embodiments, the longitudinal section (section shown in Fig. 1-2) for sealing tooth 4 is in rectangle or triangle, is such as schemed
Shown in 1, the longitudinal section for sealing tooth 4 is triangular in shape, as shown in Fig. 2, the longitudinal section of sealing tooth 4 is in rectangle, the utility model is not
It is limited to this, the shape those skilled in the art for sealing the longitudinal section of tooth 4 can be determines according to actual conditions.
In some embodiments, as shown in Figure 1, brush seal component 1 includes the first brush seal component 11 and the second brush
Formula seal member 12, honeycomb seal component 2 include the first honeycomb seal component 21 and the second honeycomb seal component 22, Finger seal
Component 3 is set between the first brush seal component 11 and the second brush seal component 12, and the first honeycomb seal component 21 is set to the
Between one brush seal component 11 and Finger seal component 3, the second honeycomb seal component 22 is set to Finger seal component 3 and the
Between two brush seal components 12.Further, it is brush close to be located at the first brush seal component 11 and second for Finger seal component 3
Seal the middle position of component 12.Further, as shown in Figure 1, the left end of the first honeycomb seal component 21 and first brush close
The right end connection of component 11 is sealed, the right end of the first honeycomb seal component 21 is connect with the left end of Finger seal component 3；Second honeycomb
The left end of seal member 22 is connect with the right end of Finger seal component 3, the right end of the second honeycomb seal component 22 and second brush
The left end of seal member 12 connects.
In some embodiments, as shown in Fig. 2, Finger seal component 3 includes that the first Finger seal component 31 and second refers to
Sharp seal member 32, honeycomb seal component 2 include the first honeycomb seal component 21 and the second honeycomb seal component 22, brush seal
Component 1 is set between the first Finger seal component 31 and the second Finger seal component 32, and the first honeycomb seal component 21 is set to the
Between one Finger seal component 31 and brush seal component 1, the second honeycomb seal component 22 is set to brush seal component 1 and the
Between two Finger seal components 32.Further, brush seal component 1 is located at the first Finger seal component 31 and the second finger tip is close
Seal the middle position of component 32.Further, as shown in Fig. 2, the left end of the first honeycomb seal component 21 and the first finger tip are close
The right end connection of component 31 is sealed, the right end of the first honeycomb seal component 22 is connect with the left end of brush seal component 1；Second honeycomb
The left end of seal member 22 is connect with the right end of brush seal component 1, the right end and the second finger tip of the second honeycomb seal component 22
The left end of seal member 31 connects.
In some embodiments, the corresponding multiple sealing teeth 4 of a honeycomb seal component 2.In other words, the first honeycomb seal portion
The corresponding multiple sealing teeth 4 of part 21, the second honeycomb seal component 22 also correspond to multiple sealing teeth 4.Further, each honeycomb is close
The corresponding multiple sealing teeth 4 of component 2 are sealed to arrange along the axial uniform intervals of rotor 300.In the description of the present invention,
The meaning of " plurality " is at least two, such as two, three etc., unless otherwise specifically defined.
Below with reference to the accompanying drawings 1 the seal assembly for rotary machine according to the utility model specific embodiment is described.
As shown in Figure 1, according to the seal assembly 100 for rotary machine of the utility model embodiment, rotary machine packet
Quiet body 200 and rotor 300 are included, quiet body 200 is looped around the periphery of rotor 300, and rotor 300 can be rotatable around its axis,
Seal assembly 100 includes brush seal component 1, honeycomb seal component 2, Finger seal component 3 and sealing tooth 4, brush seal portion
Part 1, honeycomb seal component 2 and Finger seal component 3 are suitable for being located at the inner peripheral surface of quiet body 200, and the inner peripheral surface is and rotor
300 rotor 300 diametrically opposite inner peripheral surface.
Second brush seal component 12 of first brush seal component 11 and right side of the brush seal component 1 including left side,
Honeycomb seal component 2 includes the first honeycomb seal component 21 in left side and the second honeycomb seal component 22 on right side, Finger seal
Component 3 is set between the first brush seal component 11 and the second brush seal component 12 and is located at the first brush seal component 11
With the middle position of the second brush seal component 12, the first honeycomb seal component 21 is set to the first brush seal component 11 and finger tip
Between seal member 3, the second honeycomb seal component 22 is set between Finger seal component 3 and the second brush seal component 12, and
The left end of first honeycomb seal component 21 is connect with the right end of the first brush seal component 11, the right side of the first honeycomb seal component 21
End is connect with the left end of Finger seal component 3；The left end of second honeycomb seal component 22 and the right end of Finger seal component 3 connect
It connects, the right end of the second honeycomb seal component 22 is connect with the left end of the second brush seal component 12.
The periphery of rotor 300 is equipped with 6 longitudinal sections sealing tooth 4 triangular in shape, wherein 3 sealing teeth 4 are in rotor
Uniform intervals arrangement and being radially oppositely arranged with the first honeycomb seal component 21 in rotor 300 in 300 axial direction, in addition
3 sealing teeth 4 in the axial direction of rotor 300 uniform intervals arrangement and rotor 300 radially with the second honeycomb seal
Component 22 is oppositely arranged.
Brush seal component 1 and rotor 300 have the first gap, Finger seal component 3 and rotor 300 radially
There is the second gap radially, honeycomb seal component 2 and rotor 300 have third space radially, wherein between third
Gap is greater than the first gap and the second gap, and the first gap is 0.1mm~0.5mm；Second gap is 0.05mm~0.3mm.Honeycomb
Seal member 2 and the sealing gap in the radial direction of tooth 4 are 0.5mm~1mm, thickness of the seal assembly in the axial direction of quiet body 200
No more than 50mm, specifically, the thickness of brush seal component 1 in the axial direction is no more than 2mm, and honeycomb seal component is in the axial direction
On thickness be no more than 20mm.
Below with reference to Fig. 2 description according to the seal assembly 100 for rotary machine of another embodiment of the utility model.
As shown in Fig. 2, seal assembly 100 includes brush seal component 1, honeycomb seal component 2, Finger seal component 3 and seals tooth 4,
The longitudinal section for sealing tooth 4 is in rectangle.
Second Finger seal component 32 of first Finger seal component 31 and right side of the Finger seal component 3 including left side,
Honeycomb seal component 2 includes the first honeycomb seal component 21 in left side and the second honeycomb seal component 22 on right side, brush seal
Component 1 is set between the first Finger seal component 31 and the second Finger seal component 32 and is located at the first Finger seal component 31
With the middle position of the second Finger seal component 32, the first honeycomb seal component 21 is set to the first Finger seal component 31 and brush
Between seal member 1, the second honeycomb seal component 22 is set between brush seal component 1 and the second Finger seal component 32, the
The left end of one honeycomb seal component 21 is connect with the right end of the first Finger seal component 31, the right side of the first honeycomb seal component 22
End is connect with the left end of brush seal component 1；The left end of second honeycomb seal component 22 and the right end of brush seal component 1 connect
It connects, the right end of the second honeycomb seal component 22 is connect with the left end of the second Finger seal component 31.
The other structures of seal assembly shown in Fig. 2 and operation can be identical as embodiment illustrated in fig. 1, here no longer in detail
Description.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (12)
1. a kind of seal assembly for rotary machine, the rotary machine includes quiet body and rotor, which is characterized in that described
Seal assembly includes brush seal component, honeycomb seal component and Finger seal component, the brush seal component, the honeycomb
Seal member and the Finger seal component are suitable for being located on the quiet body, the brush seal component and the Finger seal portion
Part is alternately arranged along the axial direction of the rotor, and the honeycomb seal component is located at the brush seal component and the finger tip is close
Seal between component and opposite with the sealing tooth on the surface for being located at the rotor, the honeycomb seal component and the sealing tooth
Constitute labyrinth seal.
2. the seal assembly according to claim 1 for rotary machine, which is characterized in that the brush seal component with
The outer surface of the rotor radially has the first gap, the Finger seal component and the rotation the rotor
The outer surface of body radially has the second gap, the appearance of the honeycomb seal component and the rotor the rotor
Face radially has third space the rotor, and the third space is greater than between first gap and described second
Gap.
3. the seal assembly according to claim 2 for rotary machine, which is characterized in that first gap is
0.1mm~0.5mm；Second gap is 0.05mm~0.3mm.
4. the seal assembly according to claim 1 for rotary machine, which is characterized in that the honeycomb seal component with
The sealing tooth is 0.5mm~1mm in the gap radially of the quiet body.
5. the seal assembly according to claim 1 for rotary machine, which is characterized in that the seal assembly is described
Thickness in the axial direction of quiet body is no more than 50mm.
6. the seal assembly according to claim 5 for rotary machine, which is characterized in that the brush seal component exists
Thickness in the axial direction is no more than 2mm, and thickness of the honeycomb seal component in the axial direction is no more than 20mm.
7. the seal assembly according to claim 1 for rotary machine, which is characterized in that the sealing tooth longitudinal section is in
Rectangle or triangle.
8. the seal assembly according to claim 1 for rotary machine, which is characterized in that the brush seal component packet
Include the first brush seal component and the second brush seal component, the honeycomb seal component includes the first honeycomb seal component and the
Two honeycomb seal components, the Finger seal component are set to the first brush seal component and the second brush seal component
Between, the first honeycomb seal component is set between the first brush seal component and the Finger seal component, described
Second honeycomb seal component is set between the Finger seal component and the second brush seal component.
9. the seal assembly according to claim 8 for rotary machine, which is characterized in that Finger seal component position
In the middle position of the first brush seal component and the second brush seal component.
10. the seal assembly according to claim 1 for rotary machine, which is characterized in that the Finger seal component
Including the first Finger seal component and the second Finger seal component, the honeycomb seal component include the first honeycomb seal component and
Second honeycomb seal component, the brush seal component are set to the first Finger seal component and second Finger seal portion
Between part, the first honeycomb seal component is set between the first Finger seal component and the brush seal component, institute
The second honeycomb seal component is stated to be set between the brush seal component and the second Finger seal component.
11. the seal assembly according to claim 10 for rotary machine, which is characterized in that the brush seal component
Positioned at the middle position of the first Finger seal component and the second Finger seal component.
12. the seal assembly of rotary machine is used for described in any one of -11 according to claim 1, which is characterized in that an institute
It states honeycomb seal component and corresponds to multiple sealing teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820672465.5U CN208519179U (en) | 2018-05-07 | 2018-05-07 | Seal assembly for rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820672465.5U CN208519179U (en) | 2018-05-07 | 2018-05-07 | Seal assembly for rotary machine |
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| Publication Number | Publication Date |
|---|---|
| CN208519179U true CN208519179U (en) | 2019-02-19 |
Family
ID=65342422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820672465.5U Active CN208519179U (en) | 2018-05-07 | 2018-05-07 | Seal assembly for rotary machine |
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| CN (1) | CN208519179U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454576A (en) * | 2018-05-07 | 2019-11-15 | 中国联合重型燃气轮机技术有限公司 | Seal assembly for rotary machine |
| CN111140289A (en) * | 2019-12-20 | 2020-05-12 | 南京航空航天大学 | Reduce labyrinth device of obturating of gas invasion volume |
-
2018
- 2018-05-07 CN CN201820672465.5U patent/CN208519179U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454576A (en) * | 2018-05-07 | 2019-11-15 | 中国联合重型燃气轮机技术有限公司 | Seal assembly for rotary machine |
| CN111140289A (en) * | 2019-12-20 | 2020-05-12 | 南京航空航天大学 | Reduce labyrinth device of obturating of gas invasion volume |
| US11543034B2 (en) | 2019-12-20 | 2023-01-03 | Nanjing University Of Aeronautics And Astronautics | Labyrinth sealing device for reducing gas intrusion |
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