CN205297655U - Trailing type sealing device - Google Patents
Trailing type sealing device Download PDFInfo
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- CN205297655U CN205297655U CN201520942233.3U CN201520942233U CN205297655U CN 205297655 U CN205297655 U CN 205297655U CN 201520942233 U CN201520942233 U CN 201520942233U CN 205297655 U CN205297655 U CN 205297655U
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- brushing piece
- trailing type
- sealing device
- diaphragm seal
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Abstract
The utility model relates to a trailing type sealing device, a serial communication port, be trailing type sealing device include preceding baffle, backplate and set up in the front the baffle and the backplate between the trailing type gasket, preceding, backplate is the annular plate structure. The whole design benefit of this technical scheme, simple structure is reasonable, safe and reliable, convenient to use, sealing performance are good.
Description
Technical field
This utility model relates to a kind of Follow-up sealing device, is suitable for large rotor plant equipment and does movable sealing use, is particularly suitable for existing aero-engine, and the movable sealing of civilian gas turbine is replaced upgrading and uses. Belong to finger sealing device.
Background technology
Finger seal is the novel seal technology that developed recently gets up, it is to develop from brush seal, structure is similar with brush seal, adopt a series of foil to replace brush filament, sealing effectiveness and brush seal are close, and leakage rate is the 10%-20% that tradition comb tooth seals, and overcome brush seal complex manufacturing, manufacturing cost higher, it is not suitable for the deficiency making the less sealing structure of diameter, reaches to improve sealing property, reduce manufacturing cost, improve the purpose in service life. It is suitable for manufacturing the sealing structure of various sizes, easy to process, it is suitable for mass production.
Utility model content
This utility model, just for the technical problem existed in prior art, the utility model discloses a kind of Follow-up sealing device, and this technical scheme global design is ingenious, simple and reasonable, safe and reliable, easy to use, good seal performance.
To achieve these goals, the technical solution of the utility model is as follows, a kind of Follow-up sealing device, it is characterized in that, described Follow-up sealing device includes front apron, backboard and the some layers of trailing type diaphragm seal being arranged between front apron and backboard, can being monolithically fabricated also sectional to constitute, described forward and backward baffle plate is annular plate-like structure.
As a kind of improvement of this practicality, described forward and backward baffle plate is provided with circumferentially being uniformly distributed dowel hole, installing rivet hole of cushion chamber and assembling. Dowel hole and consistent two one group of the aperture installing rivet hole, circumferentially some deciles, dowel hole is counterbore, and installation rivet hole is through hole (when rivet mode connects just processing). Cushion chamber can effectively control the pressure reduction impact on sealing property, alleviates hysteresis phenomenon. Dowel hole can ensure the installation accuracy of trailing type diaphragm seal.
As a kind of improvement of this practicality, the quantity of described trailing type diaphragm seal is at least one layer.
A kind of improvement as this practicality, described trailing type diaphragm seal is endless metal thin slice, described trailing type diaphragm seal is made up of high pressure sealing sheet, low pressure seal sheet, wherein the thickness of low pressure seal sheet is 1.5 or 2 times of high pressure sealing sheet, the thickness of high pressure sealing sheet is 0.1-0.3mm, the thickness increasing low pressure seal sheet can effectively bear the axial force because pressure reduction produces, and described front apron, backboard adopt the mode of rivet or welding to be connected with trailing type diaphragm seal.
As a kind of improvement of this practicality, described trailing type diaphragm seal being provided with some along the internal diameter equally distributed brushing piece of circumference, brushing piece includes brushing piece head and brushing piece arm, and described brushing piece head forms angle of inclination with brushing piece arm. Angle of inclination is tilt along rotor direction of rotation, and angular range is at 5-20 degree, the equal round-corner transition of brushing piece head pointed part. As a kind of improvement of this practicality, having gap, gap width between described brushing piece and brushing piece is the 1/4-1/3 of brushing piece width, and gap is made up of the circular arc line style of two different curvature, and two circular arc line styles are intersected in circular hole corresponding on trailing type diaphragm seal. Gap is intersected in circular hole, and the transition of circular hole fillet can increase the toughness of the upper and lower beat of brushing piece. The equal round-corner transition of brushing piece head pointed part can reduce the abrasion with rotor.
As a kind of improvement of this practicality, described trailing type diaphragm seal being provided with circumferentially equally distributed dowel hole, wherein dowel hole is through hole. The dowel hole of place, center of circle circumference, aperture, isodisperse and pitch of holes and forward and backward baffle plate, the consistent size of the processing of rivet hole is installed, the triplet when connecting by rivet mode, circumferentially some deciles, when connecting with welding manner two one group, circumferentially some deciles. Adjacent two panels requires that the gap of first diaphragm seal is in the middle of the brushing piece of second diaphragm seal when installing with diaphragm seal of starting building, dowel hole ensure. Dowel hole can ensure installation accuracy and the positional precision of trailing type diaphragm seal.
A kind of improvement as this practicality, described trailing type diaphragm seal adopts high temperature alloy or C/C composite, brushing piece material used be high temperature alloy or C/C composite there is elasticity, high temperature resistant, corrosion-resistant, can effectively adapt to rotor vibration, axial displacement and radially because of relative displacement that centrifugal force and thermal deformation cause, energy is long-term, stable, safe operation, low cost of manufacture, long service life, be suitable for manufacturing the sealing structure of various sizes.
Relative to prior art, advantage of the present utility model is as follows: 1) this technical scheme global design is ingenious, simple and reasonable, safe and reliable, easy to use, good seal performance; 2) proposing forward and backward baffle plate in this technical scheme and be all provided with circumferentially being uniformly distributed dowel hole, installing rivet hole of cushion chamber and assembling, cushion chamber can effectively control the pressure reduction impact on sealing property, alleviates hysteresis phenomenon. Dowel hole can ensure the installation accuracy of trailing type diaphragm seal. 3) this technical scheme proposes the thickness of low pressure seal sheet is 1.5 or 2 times of high pressure sealing sheet, and the thickness of high pressure sealing sheet is 0.1-0.3mm. The thickness increasing low pressure seal sheet can effectively bear the axial force because pressure reduction produces; 4) this technical scheme proposes two circular arc line styles in the gap formed between brushing piece and brushing piece and is intersected in circular hole corresponding on trailing type diaphragm seal, and the transition of circular hole fillet can increase the toughness of the upper and lower beat of brushing piece. 5) this technical scheme proposes the brushing piece equal round-corner transition of head pointed part of trailing type diaphragm seal, and this structure is when contacting gently with rotor, and frictional resistance is little, can reduce the abrasion with rotor; 6) this technical scheme proposes trailing type diaphragm seal and is provided with and is circumferentially uniformly distributed dowel hole (installation rivet hole), it is ensured that the installation accuracy of trailing type diaphragm seal and positional precision; 7) steam loss of this Follow-up sealing device is only the 10%-20% of tradition comb tooth sealing device.There is good sealing property, brushing piece material used is high temperature alloy or C/C composite has elasticity, high temperature resistant, corrosion-resistant, can effectively adapt to rotor vibration, the relative displacement that axial displacement and radial direction cause because of centrifugal force and thermal deformation, can be long-term, stable, safe operation, low cost of manufacture, long service life, it is suitable for manufacturing the sealing structure of various sizes, the brushing piece of different trailing type diaphragm seals is designed according to different-diameter, quantity, angle of inclination and brushing piece head, the equal adjustable of arm dimensions size, high, the quantity composition of low diaphragm seal is combined also dependent on the requirement of sealing station. Follow-up sealing device is easy to process, is suitable for mass production.
Accompanying drawing explanation
Fig. 1 is Follow-up sealing device structural representation;
Fig. 2 is trailing type diaphragm seal structural representation;
Fig. 3 is trailing type diaphragm seal partial enlargement figure structure schematic representation;
Fig. 4 is Follow-up sealing device front apron structural representation;
Fig. 5 is Follow-up sealing device backboard structural representation;
In figure: 1 is front apron, 2 is forward and backward baffle plate dowel hole, and 3 is alignment pin, 4 is forward and backward baffle plate cushion chamber, 5 is trailing type diaphragm seal, and 5-1 is high pressure sealing sheet, and 5-2 is low pressure seal sheet, 6 is backboard, 7 is trailing type diaphragm seal dowel hole (installation rivet hole), and 8 is baffle plate dowel hole, and 9 is that baffle plate installs rivet hole, 10 is brushing piece head, and 11 is brushing piece arm.
Detailed description of the invention
In order to deepen understanding and cognition of the present utility model, below in conjunction with the drawings and specific embodiments this utility model it is further described and introduce.
Embodiment 1: referring to Fig. 1, Fig. 2, a kind of Follow-up sealing device, described Follow-up sealing device includes front apron 1, backboard 6 and the some layers of trailing type diaphragm seal 5 being arranged between front apron 1 and backboard 6, described forward and backward baffle plate is annular plate-like structure, this structure can be monolithically fabricated also sectional and constitute, flexibly and easily.
Embodiment 2: referring to Fig. 1, Fig. 2, as a kind of improvement of this practicality, described front apron 1, backboard 6 is provided with circumferentially being uniformly distributed dowel hole 8, installing rivet hole 9 of cushion chamber 4 and assembling. Dowel hole is consistent with the aperture installing rivet hole, two one group, circumferentially some deciles, and dowel hole is counterbore, and installation rivet hole is through hole, just processing when rivet mode connects. Cushion chamber 4 can effectively control the pressure reduction impact on sealing property, alleviates hysteresis phenomenon. Dowel hole can ensure the installation accuracy of trailing type diaphragm seal. All the other structures are identical with embodiment 1 with advantage.
Embodiment 3: referring to Fig. 1, Fig. 2, a kind of improvement as this practicality, described trailing type diaphragm seal 5 is endless metal thin slice, described trailing type diaphragm seal is made up of high pressure sealing sheet 5-1, low pressure seal sheet 5-2, wherein the thickness of low pressure seal sheet is 1.5 or 2 times of high pressure sealing sheet, the thickness of high pressure sealing sheet is 0.1-0.3mm, the thickness increasing low pressure seal sheet can effectively bear the axial force because pressure reduction produces, and described front apron, backboard adopt the mode of rivet or welding to be connected with trailing type diaphragm seal. All the other structures are identical with embodiment 1 with advantage.
Embodiment 4: referring to Fig. 1, Fig. 2, Fig. 3 and 4, Fig. 5, a kind of improvement as this practicality, being provided with some along the internal diameter equally distributed brushing piece of circumference on described trailing type diaphragm seal, brushing piece includes brushing piece head 10 and brushing piece arm 11, and described brushing piece head forms angle of inclination with brushing piece arm.Angle of inclination is tilt along rotor direction of rotation, and angular range is at 5-20 degree, the equal round-corner transition of brushing piece head pointed part. All the other structures are identical with embodiment 1 with advantage.
Embodiment 5: referring to Fig. 1, Fig. 2, Fig. 3, as a kind of improvement of this practicality, having gap, gap width between described brushing piece and brushing piece is the 1/4-1/3 of brushing piece width, gap is made up of the circular arc line style of two different curvature, and two circular arc line styles are intersected in circular hole corresponding on trailing type diaphragm seal. Gap is intersected in circular hole, and the transition of circular hole fillet can increase the toughness of the upper and lower beat of brushing piece. The equal round-corner transition of brushing piece head pointed part can reduce the abrasion with rotor. All the other structures are identical with embodiment 1 with advantage.
Embodiment 6: referring to Fig. 1, Fig. 2, Fig. 3, as a kind of improvement of this practicality, described trailing type diaphragm seal being provided with circumferentially equally distributed dowel hole 7 and namely installs rivet hole, wherein dowel hole is through hole. The dowel hole of place, center of circle circumference, aperture, isodisperse and pitch of holes and forward and backward baffle plate, the consistent size of the processing of rivet hole is installed, the triplet when connecting by rivet mode, circumferentially some deciles, when connecting with welding manner two one group, circumferentially some deciles. Adjacent two panels requires that the gap of first diaphragm seal is in the middle of the brushing piece of second diaphragm seal when installing with diaphragm seal of starting building, dowel hole ensure. Dowel hole can ensure installation accuracy and the positional precision of trailing type diaphragm seal. All the other structures are identical with embodiment 1 with advantage.
Embodiment 7: referring to Fig. 1, Fig. 2, a kind of improvement as this practicality, described trailing type diaphragm seal adopts high temperature alloy or C/C composite, brushing piece material used be high temperature alloy or C/C composite there is elasticity, high temperature resistant, corrosion-resistant, can effectively adapt to rotor vibration, axial displacement and radially because of relative displacement that centrifugal force and thermal deformation cause, energy is long-term, stable, safe operation, and low cost of manufacture, long service life are suitable for manufacturing the sealing structure of various sizes. All the other structures are identical with embodiment 1 with advantage.
At least one in technical characteristic described in embodiment 2,3,4,5,6,7 and embodiment 1 can also be combined and form new embodiment by this utility model.
It should be noted that above-described embodiment, be not used for limiting protection domain of the present utility model, equivalents done on the basis of technique scheme or replacement each fall within this utility model scope of the claimed protection.
Claims (8)
1. a Follow-up sealing device, it is characterised in that described Follow-up sealing device includes front apron, backboard and the trailing type diaphragm seal being arranged between front apron and backboard, and described forward and backward baffle plate is annular plate-like structure.
2. Follow-up sealing device according to claim 1, it is characterised in that described forward and backward baffle plate is provided with cushion chamber and assembling be circumferentially uniformly distributed dowel hole, install rivet hole.
3. Follow-up sealing device according to claim 2, it is characterised in that the quantity of described trailing type diaphragm seal is at least a layer.
4. the Follow-up sealing device according to Claims 2 or 3, it is characterized in that, described trailing type diaphragm seal is endless metal thin slice, described trailing type diaphragm seal is made up of high pressure sealing sheet, low pressure seal sheet, wherein the thickness of low pressure seal sheet is 1.5 or 2 times of high pressure sealing sheet, and the thickness of high pressure sealing sheet is 0.1-0.3mm.
5. Follow-up sealing device according to claim 4, it is characterized in that, described trailing type diaphragm seal is provided with along the internal diameter equally distributed brushing piece of circumference, brushing piece includes brushing piece head and brushing piece arm, described brushing piece head forms angle of inclination with brushing piece arm, angle of inclination is tilt along rotor direction of rotation, and angular range is at 5-20 degree, the equal round-corner transition of brushing piece head pointed part.
6. Follow-up sealing device according to claim 5, it is characterized in that, having gap, gap width between described brushing piece and brushing piece is the 1/4-1/3 of brushing piece width, gap is made up of the circular arc line style of two different curvature, and two circular arc line styles are intersected in circular hole corresponding on trailing type diaphragm seal.
7. the Follow-up sealing device according to Claims 2 or 3, it is characterised in that be provided with circumferentially equally distributed dowel hole on described trailing type diaphragm seal, wherein dowel hole is through hole.
8. Follow-up sealing device according to claim 4, it is characterised in that described trailing type diaphragm seal adopts high temperature alloy or C/C composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520942233.3U CN205297655U (en) | 2015-11-24 | 2015-11-24 | Trailing type sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520942233.3U CN205297655U (en) | 2015-11-24 | 2015-11-24 | Trailing type sealing device |
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| Publication Number | Publication Date |
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| CN205297655U true CN205297655U (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520942233.3U Active CN205297655U (en) | 2015-11-24 | 2015-11-24 | Trailing type sealing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761955A (en) * | 2016-12-30 | 2017-05-31 | 江苏鑫信润科技有限公司 | F type contrate bicavate brush steam seals |
| CN114575935A (en) * | 2022-03-01 | 2022-06-03 | 西安热工研究院有限公司 | Self-adaptive flexible steam turbine shaft seal structure |
-
2015
- 2015-11-24 CN CN201520942233.3U patent/CN205297655U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761955A (en) * | 2016-12-30 | 2017-05-31 | 江苏鑫信润科技有限公司 | F type contrate bicavate brush steam seals |
| CN114575935A (en) * | 2022-03-01 | 2022-06-03 | 西安热工研究院有限公司 | Self-adaptive flexible steam turbine shaft seal structure |
| CN114575935B (en) * | 2022-03-01 | 2024-01-23 | 西安热工研究院有限公司 | Self-adaptive flexible steam turbine shaft seal structure |
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| CP03 | Change of name, title or address |
Address after: 223112 Jiangsu Hongze Huaian County Economic Development Zone Science and Technology Pioneer Park 12 Patentee after: Jiangsu Xin Xin Run Polytron Technologies Inc Address before: 211106 1 Chun Xu Road, Chunhua Industrial Park, Jiangning District, Nanjing, Jiangsu. Patentee before: Jiangsu Sunray Technology Co., Ltd. |