CN103047418A - Novel high-stability staggering three-gas wedge sealing structure - Google Patents
Novel high-stability staggering three-gas wedge sealing structure Download PDFInfo
- Publication number
- CN103047418A CN103047418A CN2013100191697A CN201310019169A CN103047418A CN 103047418 A CN103047418 A CN 103047418A CN 2013100191697 A CN2013100191697 A CN 2013100191697A CN 201310019169 A CN201310019169 A CN 201310019169A CN 103047418 A CN103047418 A CN 103047418A
- Authority
- CN
- China
- Prior art keywords
- sealing
- sections
- arcs
- gas
- stability
- 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.)
- Pending
Links
Images
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
A novel high-stability staggering three-gas wedge sealing structure comprises a sealing sleeve and a sealing body, wherein the sealing body is fixed on the sealing sleeve, circumferential labyrinth sealing teeth are arranged on the sealing body, the sealing teeth can be divided into three sections of arc structures of equal lengths, a wrap angle of the three sections of arcs is smaller than 120 degrees, three sections of arcs rotate a certain angle clockwise around arc middle points of A, B and C respectively, a staggering distance epsilon exists for each of the three sections of arcs, circle centers of the staggered three sections of arcs are O1, O2 and O3 respectively, and the distance from circle centers of the three sections of arcs to a sealing geometric center position is delta. 0<epsilon<R-r, 0<delta<R-r, R is the radius of the three sections of arcs, r is the radius of a rotor, and the circle center of the rotor is O. According to the structure, the concept of a staggered three-oil wedge sliding bearing is referred, the whole structures for traditional round sealing are not changed, traditional round sealing structures are designed into the staggering three-gas wedge sealing structure, restraints of dynamic pressure gas films are increased, the gas film rigidity of sealing is improved, the stability can be improved, and the air flow shock excitation resistance of sealing can be improved.
Description
Technical field: the present invention relates to a kind of sealing configuration that is applied in the rotating machinery, relate in particular to a kind of Novel high-stability three gas wedge sealing configurations that misplace.
Background technique: sealing configuration is the critical component of the rotating machineries such as aeroengine, steam turbine, compressor, and sealing configuration also can produce Airflow Exciting-Vibration Force when suppressing the rotating machinery fluid leakage, affect rotor stability.Along with improving constantly of rotating machinery working medium parameter, the caused flow-induced vibration problem of air-flow power that is produced by sealing configuration is more and more outstanding.
It is similar to the hydrodynamic sliding bearing action principle that sealed motive force is learned principle.Sealing configuration air film gap has possessed the necessary condition that forms the dynamic pressure air film: 1. form wedge gap between rotor and the stator; 2. be full of continuously viscous liquid between rotor and the stator; 3. between rotor and the stator speed of related movement is arranged.The oil whip phenomenon that the flow-induced vibration phenomenon that sealing configuration gap flow power produces and sliding bearing gap oil-film force produce interosculates: 1. all be that rotating machinery micro-gap fluid produces, all belong to the fluid exciting; 2. the fluid excitation principle is identical, all is by tangential fluid excitation force so that rotor eddy, when frequency of vortex motion and rotor intrinsic frequency near the time, produce the fluid exciting; 3. oscillation phenomenon is identical, all belongs to self-excited vibration, so that rotating machinery produces low-frequency vibration.For sliding bearing, bearing type is very large on the impact of stability, the less stable of cylinder sliding bearing, in order to improve the working stability of bearing, often bearing is made the multi-oil wedge floating-ring shape, compare with the simgle oil wedge bearing of traditional cylinder sliding bearing, the multi-oil wedge floating-ring sliding bearing has been set up additional hydrodynamic, improved anti-unstability nargin, the three oil film wedge sliding bearings that misplace are typical multi-oil wedge floating-ring sliding bearings, are widely used in engineering design.
In recent years, for improving the stability of sealing, reduce Airflow Exciting-Vibration Force, people have proposed the novel seal patterns such as honeycomb, derotation stream, damping, pocket type by the structure that changes sealing itself on the basis of traditional labyrinth seal, obtained certain effect.But updating of sealing configuration pattern causes structure to become increasingly complex, and easily produces because the unstable vibration fault that friction causes.Although the sealing configuration mechanism of above-mentioned form is incomplete same, all belong in essence circular seal, i.e. sealing is circle along circumferential structure.For circular seal, the gas bearing effect that produces in the wedge gap of air-flow between eccentric rotor and stator is the key factor that causes sealing flow-induced vibration.Therefore, the flow-induced vibration problem can not be solved at all.
Summary of the invention: for above-mentioned the deficiencies in the prior art, the invention provides a kind of Novel high-stability three gas wedge sealing configurations that misplace.
For achieving the above object, the technical solution used in the present invention is: a kind of Novel high-stability three gas wedge sealing configurations that misplace, comprise stuffing box gland and seal, seal is fixed on the stuffing box gland, circumferential labyrinth seal tooth is arranged on the seal, the sealing tooth is divided into three sections isometric arc structures, the cornerite of these three sections circular arcs is less than 120 ゜, three sections circular arcs are respectively with arcuate midway point A, B, the C several angle that turns clockwise is so that all have a dislocation apart from ε between each section circular arc, to increase the degree of convergence of wedge gap, strengthen blanket gas wedge pressure.The misplace center of circle of rear three sections circular arcs is respectively O
1, O
2, O
3, and the distance of center circle of each section circular arc is δ from the distance that seals the geometrical center position.Wherein, 0＜ε＜R-r, 0＜δ＜R-r, R are the radius of three sections circular arcs, and r is the radius of rotor, and the center of circle of rotor is O, and the rotating speed of rotor is ω.
The present invention uses for reference the thought of dislocation three oil film wedge sliding bearings, does not change the overall structure of traditional circular seal, and traditional circular seal is designed to dislocation three gas wedge sealing configurations, and its major advantage is as follows:
1, simple in structure, any fixed sealing such as labyrinth seal, honeycomb seal, brush seal etc. can be changed into corresponding dislocation three gas wedge labyrinth seals, dislocation three gas wedge honeycomb seals, dislocation three gas wedge brush seals etc. accordingly;
2, compare with traditional circular seal, the three gas wedges that misplace sealing forms up and down three gas wedges at work, form three dynamic pressure air films, the dislocation type sealing configuration increases gas wedge degree of convergence, increased the constraint of dynamic pressure air film, improve the gas film stiffness of sealing, helped to improve stability, improved the anti-flow-induced vibration ability of sealing.
Description of drawings:
Fig. 1 is structural representation of the present invention.
Fig. 2 is the circumferential partial views of dislocation three gas wedge sealing configurations.
Fig. 3 is that attempt the axial part of dislocation three gas wedge sealing configurations.
Among the figure: 1-sealing tooth circular arc 1; 2-sealing tooth circular arc 2; 3-sealing tooth circular arc 3; The 4-air film; The 5-rotor; The 6-stuffing box gland; 7-T type groove; The 8-seal; 9-seals tooth.
Embodiment:
As shown in Figure 1-Figure 3, a kind of Novel high-stability three gas wedge sealing configurations that misplace, comprise stuffing box gland 6, T-shaped groove 7 and seal 8, be provided with T-shaped groove 7 in the stuffing box gland 6, seal 8 is fixed together with stuffing box gland 6 by the T-shaped groove 7 that makes progress at circumferencial direction, circumferential labyrinth seal tooth 9 is arranged on the seal 8, form air film 4 between sealing tooth 9 and the rotor 5, sealing tooth 9 is divided into three sections isometric dislocation type arc structures: the first sealing tooth circular arc 1, the second sealing tooth circular arc 2, the 3rd sealing tooth circular arc 3, the cornerite of these three sections circular arcs is less than 120 ゜, and three sections circular arcs are respectively with arcuate midway point A, B, the C several angle that turns clockwise, so that a dislocation is all arranged apart from ε between each section circular arc, to increase the degree of convergence of wedge gap, strengthen blanket gas wedge pressure.The center of circle of circular arc 1 is O after the dislocation
1, the center of circle of circular arc 2 is O
2, the center of circle of circular arc 3 is O
3, the distance of center circle of three sections circular arcs is δ from the distance of sealing geometrical center position, 0＜δ＜R-r wherein, and 0＜δ＜R-r, R are the radius of three sections circular arcs, and r is the radius of rotor, and the center of circle of rotor is O, and the rotating speed of rotor is ω.
Like this, the relative sliding surface between rotor and stator forms oil film, produces dynamic pressure under the wedge gap between rotor and stator.The characteristics of the three gas wedges that misplace sealing are: compare with traditional circular seal, the three gas wedge sealing configurations that misplace form up and down three gas wedges at work, form three dynamic pressure air films, have increased the constraint of dynamic pressure air film, have strengthened the stability of sealing; And dislocation type three gas wedge sealing configurations have increased the degree of convergence of gas wedge, have increased gas wedge power, have improved the gas film stiffness of sealing, help to improve stability, improve the anti-flow-induced vibration ability of sealing.Therefore compare the gas film stiffness that has improved sealing with circular seal, and then improved the stability of sealing.
The present invention continues to use current a lot of fixing seal fixing T-shaped groove mounting type is installed.The sealing of dislocation three gas wedges is designed to be fixed in the fixed component of the T-shaped groove of cylinder, does not change the overall structure of traditional circular seal, only the sealing toothed portion with conventional seals changes three sections isometric arc structures into by round structure.When rotor rotates, form three gas wedges, form three dynamic pressure air films, increased the constraint of dynamic pressure air film, strengthened the sealing gas film stiffness, help to improve the stability of sealing.The sealing block material is common 45 steel, GC
R15Deng material.
Claims (2)
1. a Novel high-stability three gas wedge sealing configurations that misplace, comprise stuffing box gland and seal, seal is fixed on the stuffing box gland, it is characterized in that: circumferential labyrinth seal tooth is arranged on the seal, the sealing tooth is divided into three sections isometric arc structures, and the cornerite of these three sections circular arcs is less than 120
゜, three sections circular arcs are respectively with arcuate midway point A, B, the C several angle that turns clockwise, so that a dislocation is all arranged apart from ε between each section circular arc, the center of circle of the rear three sections circular arcs that misplace is respectively O
1, O
2, O
3, and the distance of center circle of each section circular arc is δ from the distance of sealing geometrical center position, wherein, 0＜ε＜R-r, 0＜δ＜R-r, R are the radius of three sections circular arcs, and r is the radius of rotor, and the center of circle of rotor is O.
2. a kind of Novel high-stability as claimed in claim 1 three gas wedge sealing configurations that misplace, it is characterized in that: be provided with T-shaped groove in the stuffing box gland, seal is fixed together by make progress at circumferencial direction T-shaped groove and stuffing box gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100191697A CN103047418A (en) | 2013-01-18 | 2013-01-18 | Novel high-stability staggering three-gas wedge sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100191697A CN103047418A (en) | 2013-01-18 | 2013-01-18 | Novel high-stability staggering three-gas wedge sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103047418A true CN103047418A (en) | 2013-04-17 |
Family
ID=48060180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100191697A Pending CN103047418A (en) | 2013-01-18 | 2013-01-18 | Novel high-stability staggering three-gas wedge sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103047418A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08338537A (en) * | 1995-06-09 | 1996-12-24 | Toshiba Corp | Labyrinth seal |
| JP2002266605A (en) * | 2001-02-28 | 2002-09-18 | Ronald E Brandon | Non-retractable segmented packing ring for fluid turbine having special spring for reducing force between shaft friction |
| JP2005214144A (en) * | 2004-01-30 | 2005-08-11 | Toshiba Corp | Swirl flow prevention device for fluid machine |
| FR2893357A1 (en) * | 2005-11-15 | 2007-05-18 | Snecma Sa | Turbine rotor is fitted with scraper ring forming part of labyrinth seal made up of sections which are tilted so that their outer edge is below level of that of preceding section but projects above succeeding one |
| US20120121411A1 (en) * | 2010-11-12 | 2012-05-17 | Hitachi, Ltd. | Labyrinth Seals for Turbomachinery |
| CN102588507A (en) * | 2011-01-07 | 2012-07-18 | 通用电气公司 | Elliptical sealing system |
| CN202370592U (en) * | 2011-12-20 | 2012-08-08 | 范宏财 | Scale type arrangement steam seal belt for steam turbine and steam seal device for steam turbine |
-
2013
- 2013-01-18 CN CN2013100191697A patent/CN103047418A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08338537A (en) * | 1995-06-09 | 1996-12-24 | Toshiba Corp | Labyrinth seal |
| JP2002266605A (en) * | 2001-02-28 | 2002-09-18 | Ronald E Brandon | Non-retractable segmented packing ring for fluid turbine having special spring for reducing force between shaft friction |
| JP2005214144A (en) * | 2004-01-30 | 2005-08-11 | Toshiba Corp | Swirl flow prevention device for fluid machine |
| FR2893357A1 (en) * | 2005-11-15 | 2007-05-18 | Snecma Sa | Turbine rotor is fitted with scraper ring forming part of labyrinth seal made up of sections which are tilted so that their outer edge is below level of that of preceding section but projects above succeeding one |
| US20120121411A1 (en) * | 2010-11-12 | 2012-05-17 | Hitachi, Ltd. | Labyrinth Seals for Turbomachinery |
| CN102588507A (en) * | 2011-01-07 | 2012-07-18 | 通用电气公司 | Elliptical sealing system |
| CN202370592U (en) * | 2011-12-20 | 2012-08-08 | 范宏财 | Scale type arrangement steam seal belt for steam turbine and steam seal device for steam turbine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102953771A (en) | Labyrinth damping sealing device with low leakage and high damping performance | |
| CN104508253A (en) | Rotary machine | |
| CN113154047B (en) | Self-rotation-stopping labyrinth seal based on addendum winglet structure and processing method thereof | |
| CN105156687A (en) | Dry gas seal device | |
| CN104454031A (en) | Combined seal structure with labyrinth seal structure and brush seal structure | |
| CN108699915B (en) | Seal structure and turbo machine | |
| CN112112976A (en) | Novel tooth sealing structure capable of enhancing sealing performance | |
| CN111043317A (en) | Novel dynamic pressure damping seal structure | |
| EP2607630B1 (en) | Honeycomb seal and method of manufacturing a seal | |
| US10385711B2 (en) | Elastic sheet used for turbine follow-up suspended steam seal belt and steam seal structure thereof | |
| CN103047420B (en) | Novel high-stability staggering round sealing structure | |
| CN103047417A (en) | Novel high-stable oval sealing structure | |
| CN103047418A (en) | Novel high-stability staggering three-gas wedge sealing structure | |
| CN204284449U (en) | A kind of circular arc form drag revolves grid sealing configuration | |
| CN204283504U (en) | A kind of rectangular resistance revolves grid sealing configuration | |
| CN103075520B (en) | The oval sealing configuration of a kind of Novel high stability dislocation | |
| CN103047421A (en) | Novel high-stability three-gas wedge sealing structure | |
| CN103047419A (en) | Novel high-stable four air wedge sealing structure | |
| CN103090012A (en) | Novel high stability dislocation four gas wedge seal structure | |
| CN110630686A (en) | Vortex type squeeze oil film damper | |
| CN210531509U (en) | Cantilever type double-layer squeeze film damping shock absorber | |
| CN206360728U (en) | Double honeycomb seal structures | |
| CN104912604A (en) | Anti-rotation plate structure with rotation stopping and vibration restraining actions | |
| CN109322710A (en) | A kind of inclined ellipse pocket sealing structure adapting to rotor eddy | |
| CN204921053U (en) | When double -deck comb tooth in clearance of obturaging structure of obturaging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |