CN106246242A - A kind of contactless finger sealing device having fin - Google Patents
A kind of contactless finger sealing device having fin Download PDFInfo
- Publication number
- CN106246242A CN106246242A CN201610878473.0A CN201610878473A CN106246242A CN 106246242 A CN106246242 A CN 106246242A CN 201610878473 A CN201610878473 A CN 201610878473A CN 106246242 A CN106246242 A CN 106246242A
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- CN
- China
- Prior art keywords
- finger tip
- finger
- fin
- sheet
- contactless
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/025—Seal clearance control; Floating assembly; Adaptation means to differential thermal dilatations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
Abstract
A kind of contactless finger sealing device having fin, including the contactless finger sealing device with rotor engagement, the contactless finger sealing device low pressure finger tip sheet by front and rear baffle, high pressure finger tip sheet and with finger tip boots structure is connected in sequence, and has and finger tip beam low-pressure side surface and the fin of the T-shaped layout of finger tip boots structure on low pressure finger tip sheet；This fin utilizes hydrodynamic and hydrostatic pressure effect together with low pressure finger tip boots, produces lifting force under the effect that front and back's pressure reduction and rotor rotate, and finger tip sheet is lifted away from rotor surface, thus realizes sealing the noncontact with rotor；When rotor generation radial displacement, this structure can more efficiently be automatically adjusted finger tip sheet attitude, make the circular runout of the motor fitness rotor of finger tip sheet, contactless state is kept while ensureing sealing effectiveness, play and reduce the effect even eliminating conventional noncontact Finger seal " hesitation ", improve the dynamic sealing performance of noncontact Finger seal.
Description
Technical field
The invention belongs to the non-contacting seal device of rotary shaft, close particularly to a kind of contactless finger tip having a fin
Seal apparatus.
Background technology
Turbomachinery especially aero-engine usually need to carrying out fluid-tight between revolving part and static element,
To reduce refrigerant leakage, improve its work efficiency.Contactless Finger seal is a kind of novel rotor seal technology, by
NASA (NASA) is as aerial engine sealing technology of future generation and puts into huge fund and studies.This novel close
Envelope can utilize the static pressure of sealing fluid and dynamic pressure effect to realize sealing the noncontact with rotor, while ensureing low leakage in fact
The existing high life.It should be noted that when deviateing the position of its original when rotor generation radial displacement, it would be desirable to non-connect by this
The dynamic characteristic of touch Finger seal realizes the finger tip sheet dynamic response to rotor deflection so that it is sealing property can maintain relatively
Excellent level.But due to the frictional force effect between finger tip sheet and backboard, when rotor generation radial displacement, finger tip sheet is pushed away
From initial position, and finger tip sheet is made to be difficult to return to initial position when rotor radial displacement is replied due to the obstruction of frictional force,
Thus increase seal clearance, cause sealing property to decline.This phenomenon of contactless Finger seal is referred to as " sluggish effect
Should ".
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of contactless finger having fin
Point sealing device, improves finger tip sheet dynamic response capability under fluid pressure effect, plays when rotor generation radial displacement
It is automatically adjusted finger tip sheet attitude, thus realizes sealing the dynamic response to rotor eccentricity, simultaneously work as reducing conventional noncontact and refer to
Point seals the effect of " hesitation ", improves the dynamic sealing performance of noncontact Finger seal.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of contactless finger sealing device having fin, including the contactless Finger seal dress coordinated with rotor 6
Putting, described contactless finger sealing device is by front apron 1, high pressure finger tip sheet 2 and the low pressure finger tip with finger tip boots structure 5
Sheet 3 is connected in sequence, and is provided with fin 4 on described low pressure finger tip sheet 3.
The finger tip beam low-pressure side surface of described fin 4 and low pressure finger tip sheet 3 and the T-shaped layout of finger tip boots structure 5,
And low pressure finger tip sheet 3, finger tip boots structure 5 and fin 4 are structure as a whole.
Described fin 4 is the molded line on the strip-shaped thin impeller structure having one fixed width, and its length direction and low pressure finger tip sheet 3
Finger tip beam type line identical.
The width of described fin 4 is identical or slightly shorter with finger tip boots structure 5 axial length, and width range is 5-7.5mm；Fin
Thickness range is 0.1-0.5mm.
Described fin 4 can be arranged on high pressure finger tip sheet 2 or low pressure finger tip sheet 3 according to demand, and can be according to fin 4
Deployment scenarios arranges front apron 1 and backboard 7.
Beneficial effects of the present invention: relative to existing conventional noncontact fingertip sealing structure, the one of the present invention has rib
The contactless Finger seal of sheet can rely on the rib structure of slender lobule formula, and the effect better profiting from the upper and lower fluid pressure difference of fin comes
Improve the dynamic response capability of finger tip sheet, rely on the axial dimension that fin is bigger to obtain more preferable High Pressure Difference simultaneously and bear energy
Power, therefore can cancel the backboard structure of axial supporting role, eliminates when low pressure finger tip sheet moves and between backboard
Frictional resistance, weaken and even eliminate " hesitation ", overcome former Packed shortcoming, drastically increase contactless
The dynamic sealing performance of Finger seal.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention, and wherein Fig. 1 a is overall structure schematic diagram, and Fig. 1 b is that fin 4 is at low end finger
Distribution schematic diagram on splinter 3.
Fig. 2 is the structural representation being provided with backboard 7.
Fig. 3 is the schematic diagram being equipped with fin on high pressure finger tip sheet 2 and low pressure finger tip sheet 3.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is elaborated.
With reference to Fig. 1, a kind of contactless finger sealing device having fin, including the contactless finger coordinated with rotor 6
Point sealing device, contactless finger sealing device is by front apron 1, high pressure finger tip sheet 2 and the low pressure with finger tip boots structure 5
Finger tip sheet 3 is connected in sequence, and there is a rib structure 4 on low pressure finger tip sheet 3.
The finger tip beam low-pressure side surface of described fin 4 and low pressure finger tip sheet 3 and the T-shaped cloth of finger tip boots structure 5
Put, and low pressure finger tip sheet 3, finger tip boots structure 5 and fin 4 are structure as a whole.Fin 4 is that the banding slender lobule having one fixed width is tied
Molded line on structure, and its length direction is identical, such as circular arc molded line, involute profile, spiral shell with the finger tip beam type line of low pressure finger tip sheet 3
Spin line molded line etc..
Described fin 4 width is identical or slightly shorter with finger tip boots structure 5 axial length, and width range is 5-7.5mm；Fin
Thickness range is 0.1-0.5mm, and fin 4 height is determined by factors such as finger tip beam type line, finger tip chip size, backboard sizes.
With reference to Fig. 2, it is provided with backboard 7 after the sheet of low pressure finger tip shown in Fig. 23, certain screening stream effect can be played.
With reference to Fig. 3, the sheet of high pressure finger tip shown in Fig. 32 and low pressure finger tip sheet 3 are equipped with fin 4, and eliminate front apron 1.
With reference to Fig. 3, the shown rib structure 4 on high pressure finger tip sheet 2, following table in the effect and fin of high pressure draught
Under the differential pressure action in face, lifting force can be produced on fin 4, so that high pressure finger tip sheet 2 also can realize the noncontact with rotor,
Reduce fretting wear.
The operation principle of the present invention: upstream high side liquid is by high pressure finger tip sheet 2, between low pressure finger tip sheet 3 and rotor 6
Seal clearance flow into down stream low pressure side, under hydrostatic pressure and rotor rotate the hydrodynamic effect brought, finger tip boots are tied
Producing lifting effect bottom structure 5, the fluid pressure difference of both sides up and down of fin 4 also produces certain lifting effect simultaneously, sends out at rotor
During raw radial displacement, this structure can more efficiently be automatically adjusted finger tip sheet attitude, makes the footpath of the motor fitness rotor of finger tip sheet
To beating, while ensureing sealing effectiveness, make to realize between sealing and rotor noncontact.The axial dimension of fin 4 is relatively big, carries
The high axial rigidity of black box, can bear bigger before and after pressure reduction.It addition, low pressure finger tip sheet 3 no longer connects with backboard 7
Touch, weaken and even eliminate " hesitation ", substantially increase the dynamic sealing performance of contactless Finger seal.
Claims (5)
1. there is a contactless finger sealing device for fin, including the contactless Finger seal dress coordinated with rotor (6)
Putting, described contactless finger sealing device is by front apron (1), high pressure finger tip sheet (2) and low with finger tip boots structure (5)
End finger splinter (3) is connected in sequence, it is characterised in that: on described low pressure finger tip sheet (3), it is provided with fin (4), fin (4)
It is positioned at the low-pressure side of low pressure finger tip sheet (3).
The most according to claim 1 a kind of have fin contactless finger sealing device, it is characterised in that: described rib
The finger tip beam low-pressure side surface of sheet (4) and low pressure finger tip sheet (3) and finger tip boots structure (5) T-shaped layout, and low end finger
Splinter (3), finger tip boots structure (5) and fin (4) are structure as a whole.
A kind of contactless finger sealing device having fin the most according to claim 1, it is characterised in that: described fin
(4) it is to have the strip-shaped thin impeller structure of one fixed width, and the finger tip beam type line of the molded line on its length direction and low pressure finger tip sheet (3)
Identical.
A kind of contactless finger sealing device having fin the most according to claim 1, it is characterised in that: described fin
(4) width is identical or slightly shorter with finger tip boots structure (5) axial length, and width range is 5-7.5mm；Fin (4) thickness range
It is 0.1-0.5mm.
A kind of contactless finger sealing device having fin the most according to claim 1, it is characterised in that: described rib
Sheet (4) is arranged in high pressure finger tip sheet (2) or low pressure finger tip sheet (3) according to demand, and sets according to the deployment scenarios of fin (4)
Put front apron (1) and backboard (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878473.0A CN106246242B (en) | 2016-10-08 | 2016-10-08 | A kind of contactless finger sealing device for having fin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878473.0A CN106246242B (en) | 2016-10-08 | 2016-10-08 | A kind of contactless finger sealing device for having fin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246242A true CN106246242A (en) | 2016-12-21 |
| CN106246242B CN106246242B (en) | 2018-01-16 |
Family
ID=57611232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610878473.0A Active CN106246242B (en) | 2016-10-08 | 2016-10-08 | A kind of contactless finger sealing device for having fin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106246242B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143386A (en) * | 2017-06-15 | 2017-09-08 | 南京林业大学 | From pumping hydrodynamic finger sealing device |
| CN107366557A (en) * | 2017-08-15 | 2017-11-21 | 沈阳航空航天大学 | A kind of low leakage fingertip sealing structure for increasing seal shoe lift |
| CN110919308A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Fingertip piece boot shaping method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6364316B1 (en) * | 1999-02-11 | 2002-04-02 | Honeywell International Inc. | Dual pressure balanced noncontacting finger seal |
| US7735833B2 (en) * | 2006-11-14 | 2010-06-15 | The University Of Akron | Double padded finger seal |
| CN103711527A (en) * | 2014-01-17 | 2014-04-09 | 清华大学 | Brush type sealing and fingertip sealing combined seal |
| US9033657B2 (en) * | 2011-12-12 | 2015-05-19 | Honeywell International Inc. | Gas turbine engine including lift-off finger seals, lift-off finger seals, and method for the manufacture thereof |
| CN105545375A (en) * | 2015-12-14 | 2016-05-04 | 中国燃气涡轮研究院 | Double-beam finger seal device |
-
2016
- 2016-10-08 CN CN201610878473.0A patent/CN106246242B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6364316B1 (en) * | 1999-02-11 | 2002-04-02 | Honeywell International Inc. | Dual pressure balanced noncontacting finger seal |
| US7735833B2 (en) * | 2006-11-14 | 2010-06-15 | The University Of Akron | Double padded finger seal |
| US9033657B2 (en) * | 2011-12-12 | 2015-05-19 | Honeywell International Inc. | Gas turbine engine including lift-off finger seals, lift-off finger seals, and method for the manufacture thereof |
| CN103711527A (en) * | 2014-01-17 | 2014-04-09 | 清华大学 | Brush type sealing and fingertip sealing combined seal |
| CN105545375A (en) * | 2015-12-14 | 2016-05-04 | 中国燃气涡轮研究院 | Double-beam finger seal device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143386A (en) * | 2017-06-15 | 2017-09-08 | 南京林业大学 | From pumping hydrodynamic finger sealing device |
| CN107143386B (en) * | 2017-06-15 | 2023-05-09 | 南京林业大学 | Automatic pumping fluid dynamic pressure fingertip sealing device |
| CN107366557A (en) * | 2017-08-15 | 2017-11-21 | 沈阳航空航天大学 | A kind of low leakage fingertip sealing structure for increasing seal shoe lift |
| CN107366557B (en) * | 2017-08-15 | 2023-05-12 | 沈阳航空航天大学 | Low-leakage fingertip sealing structure capable of increasing lifting force of sealing boot |
| CN110919308A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Fingertip piece boot shaping method |
| CN110919308B (en) * | 2019-12-05 | 2020-10-09 | 中国航发四川燃气涡轮研究院 | Fingertip piece boot shaping method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106246242B (en) | 2018-01-16 |
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