CN207261661U - A kind of comb tooth sealing structure - Google Patents
A kind of comb tooth sealing structure Download PDFInfo
- Publication number
- CN207261661U CN207261661U CN201721014090.5U CN201721014090U CN207261661U CN 207261661 U CN207261661 U CN 207261661U CN 201721014090 U CN201721014090 U CN 201721014090U CN 207261661 U CN207261661 U CN 207261661U
- Authority
- CN
- China
- Prior art keywords
- rotor
- seal
- sealing
- leaf grating
- comb tooth
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 50
- 244000126211 Hericium coralloides Species 0.000 title claims abstract description 22
- 230000004323 axial length Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a kind of comb tooth sealing structure, including：Sealing shroud, seal and rotor, seal is in a ring, it is fixed on the inner side of sealing shroud, the inner side of seal is evenly arranged with sealing tooth along its circumferential direction, forms annular seal space between sealing tooth, rotor is arranged at the inner side of seal, air film is formed between sealing tooth, the outer surface of rotor is along its circumferential leaf grating with being axially uniformly provided with multigroup adjustable angle, and during rotor is rotating, the leaf grating is rotated with rotor in annular seal space.The structure of the comb tooth sealing structure is novel, it is applied widely, can effectively reduce quantity of gas leakage.
Description
Technical field
A kind of movable sealing structure being applied in rotating machinery is the utility model is related to, specifically provides a kind of comb tooth sealing
Structure.
Background technology
With the development of aviation industry, the requirement to the mobility of aircraft, reliability and economy is higher and higher, therefore compels
The all parts being essential in aero-engine to be improved, to ensure the high performance requirement of engine.And sealing structure is as aviation
Critical component in the rotating machineries such as engine, steam turbine, compressor, its performance can directly affect the work effect of aero-engine
Rate and rotor stability.Research shows the raising of following aero-engine performance both at home and abroad, will largely depend on envelope
The tight improvement of technology and the reduction of leakage rate.Therefore, improving and developing new densification device has important practical value and meaning
Justice.
Comb tooth sealing be widely used a kind of seal structure in active service aero-engine, it be using runner sudden expansion and
Sudden contraction increases flow resistance to reduce the contactless dynamic sealing of the leakage of fluid.When fluid passes through throttle clearance, the pressure of upstream fluid
Power can be converted into speed energy by throttling action, and it is thermal energy that then speed can be dissipated by turbulent flow whirlpool in tooth cavity.It is sealed
Effect depend primarily upon seal clearance size and the number of teeth number, have that simple in structure, cost is low, without frictional dissipation and suitable
The features such as high rotating speed.
At present, it is various it is new obturage structure sheaf go out it is not poor.Compared to the new seal structure such as brush seal, traditional comb tooth
Sealing structure leakage rate is larger, and sealing performance is poor so that aero-engine loss in efficiency is big, fuel oil oil consumption is high.
Therefore, how existing comb tooth sealing structure is improved, to reduce its leakage rate, improves its leakproofness, into
For people's urgent problem to be solved.
Utility model content
In consideration of it, the purpose of this utility model is to provide a kind of comb tooth sealing structure, to solve existing comb tooth sealing knot
The problems such as structure leakage rate is big, poor sealing.
Technical solution provided by the utility model is：A kind of comb tooth sealing structure, including：Sealing shroud, seal and rotor,
Seal in a ring, is fixed on the inner side of sealing shroud, and the inner side of seal is evenly arranged with sealing tooth along its circumferential direction, sealing tooth it
Between form annular seal space, rotor is arranged at the inner side of seal, and air film is formed between sealing tooth, and the outer surface of rotor is along its circumferential direction
With the axial leaf grating for being uniformly provided with multigroup adjustable angle, during rotor is rotating, the leaf grating is being sealed with rotor
Rotated in chamber.
It is preferred that being provided with T-slot on the inside of sealing shroud, the section of seal is in I-shaped, it is spacing be arranged at it is described T-shaped
In groove.
Further preferably, the shape of leaf grating is in fusiformis, and leaf grating is fixedly installed on rotor by screw bolt and nut.
Further preferably, the length of leaf grating is 1.5~2 times of annular seal space axial length, and width is annular seal space axial length
0.2~0.6 times.
Further preferably, the mean camber line of leaf grating and the angle of rotor axis are -30~30 degree of degree.
Further preferably, seal is steel seal or GCr15Seal.
Comb tooth sealing structure provided by the utility model, sets the leaf grating of adjustable angle on rotor, when rotor rotates
When, leaf grating can extrude side air in a manner of beveling, so as to produce a low-pressure area and a higher-pressure region, form one gas
Stream.After the flow direction of gas leakage is determined, by adjusting the angle of leaf grating, direction and the leakage of this strand of air-flow can be made
Gas direction can produce substantial amounts of whirlpool, and then dissipate gas leakage on the contrary, when two strands of air-flows meet in annular seal space
Energy, increases the on-way resistance of gas leakage, so as to achieve the purpose that to reduce leakage rate.
The structure of comb tooth sealing structure provided by the utility model is novel, installation requirement is low, it is applied widely, can be effective
Reduce quantity of gas leakage.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment is described in further detail the utility model：
Fig. 1 is the structure diagram of comb tooth sealing structure；
Fig. 2 is the structure diagram of rotor；
Fig. 3 is the side view of rotor；
Fig. 4 is the front view of leaf grating.
Embodiment
The utility model is further explained below in conjunction with specific embodiment, but does not limit to this practicality
It is new.
As shown in Figure 1, the utility model provides a kind of comb tooth sealing structure, including：Sealing shroud 1, seal 2 and rotor
3, seal 2 in a ring, is fixed on the inner side of sealing shroud 1, and the inner side of seal 2 is evenly arranged with sealing tooth 21 along its circumferential direction,
Annular seal space 22 is formed between sealing tooth 21, rotor 3 is arranged at the inner side of seal 2, forms air film between sealing tooth 21, such as schemes
Shown in 1 to Fig. 3, the outer surface of rotor 3 is along its circumferential leaf grating 31 with being axially uniformly provided with multigroup adjustable angle, in rotor
During 3 is rotating, the leaf grating 31 is rotated with rotor 3 in annular seal space 22.
The comb tooth sealing structure, sets the leaf grating of adjustable angle on rotor, behind definite gas leakage flow direction,
The angle of leaf grating beveling air is adjusted, rotor can be made to produce one gas opposite with gas leakage flow direction when rotated
Stream, when two strands of air-flows meet in annular seal space, can produce substantial amounts of whirlpool, and then dissipate the energy of gas leakage, increase
The on-way resistance of gas leakage, so as to achieve the purpose that to reduce leakage rate.
As the improvement of technical solution, as shown in Figure 1, the inner side of sealing shroud 1 is provided with T-slot 11, the section of seal 2
It is spacing to be arranged in the T-slot 11 in I-shaped.
As the improvement of technical solution, as shown in Figure 1, Figure 2, Figure 4 shows, the shape of leaf grating 31 is in fusiformis, and leaf grating 31 passes through spiral shell
Screw bolt and nut is fixedly installed on rotor 3, and the length A of leaf grating 31 is preferably 1.5~2 times of 22 axial length of annular seal space, width B
Preferably 0.2~0.6 times of 22 axial length of annular seal space.The mean camber line of leaf grating 31 is -30 degree~30 with the angle of 3 axis of rotor
Degree.Bolt is fixed on rotor through leaf grating, and nut rotary setting can adjust leaf grating in the top of leaf grating by tightening nut
The angle of air is chamfer, so as to change the flow direction to form air-flow, the length of bolt is preferably 6cm, a diameter of 1cm, nut
Thickness be preferably 1cm, diameter is preferably 1.2cm.
As the improvement of technical solution, seal 2 is preferably steel seal or GCr15Seal.
Specific embodiment of the present utility model is write according to progressive mode, highlights each embodiment party
The difference of case, its similar portion can be with cross-reference.
The embodiment of the utility model is elaborated above in conjunction with attached drawing, but the utility model is not limited to
The above embodiment, within the knowledge of a person skilled in the art, can also not depart from the utility model
Various changes can be made on the premise of objective.
Claims (6)
- A kind of 1. comb tooth sealing structure, it is characterised in that including：Sealing shroud (1), seal (2) and rotor (3), seal (2) In a ring, the inner side of sealing shroud (1) is fixed on, the inner side of seal (2) is evenly arranged with sealing tooth (21), sealing along its circumferential direction Annular seal space (22) is formed between tooth (21), rotor (3) is arranged at the inner side of seal (2), and gas is formed between sealing tooth (21) Film, the outer surface of rotor (3) is along its circumferential leaf grating (31) with being axially uniformly provided with multigroup adjustable angle, in rotor (3) During rotating, the leaf grating (31) rotates with rotor (3) in annular seal space (22).
- 2. comb tooth sealing structure described in accordance with the claim 1, it is characterised in that：Sealing shroud is provided with T-slot on the inside of (1) (11), the section of seal (2) is in I-shaped, spacing to be arranged in the T-slot (11).
- 3. comb tooth sealing structure described in accordance with the claim 1, it is characterised in that：The shape of leaf grating (31) is in fusiformis, leaf grating (31) it is fixedly installed on by screw bolt and nut on rotor (3).
- 4. comb tooth sealing structure described in accordance with the claim 1, it is characterised in that：The length of leaf grating (31) is annular seal space (22) axis To 1.5~2 times of length, width is 0.2~0.6 times of annular seal space (22) axial length.
- 5. according to the comb tooth sealing structure described in claim 4, it is characterised in that：The mean camber line of leaf grating (31) and rotor (3) axis The angle of line is -30~30 degree of degree.
- 6. according to the comb tooth sealing structure any one of claim 1 to 5, it is characterised in that：Seal (2) seals for steel Body or GCr15Seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721014090.5U CN207261661U (en) | 2017-08-15 | 2017-08-15 | A kind of comb tooth sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721014090.5U CN207261661U (en) | 2017-08-15 | 2017-08-15 | A kind of comb tooth sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207261661U true CN207261661U (en) | 2018-04-20 |
Family
ID=61925313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721014090.5U Expired - Fee Related CN207261661U (en) | 2017-08-15 | 2017-08-15 | A kind of comb tooth sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207261661U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314114A (en) * | 2017-08-15 | 2017-11-03 | 沈阳航空航天大学 | A kind of comb tooth sealing structure |
-
2017
- 2017-08-15 CN CN201721014090.5U patent/CN207261661U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314114A (en) * | 2017-08-15 | 2017-11-03 | 沈阳航空航天大学 | A kind of comb tooth sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 |