CN202707152U - Floating brush sealing structure - Google Patents
Floating brush sealing structure Download PDFInfo
- Publication number
- CN202707152U CN202707152U CN 201220105212 CN201220105212U CN202707152U CN 202707152 U CN202707152 U CN 202707152U CN 201220105212 CN201220105212 CN 201220105212 CN 201220105212 U CN201220105212 U CN 201220105212U CN 202707152 U CN202707152 U CN 202707152U
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- CN
- China
- Prior art keywords
- sealing
- brush sealing
- brush
- low hysteresis
- elastic ring
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- 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
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- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Devices (AREA)
Abstract
A floating brush sealing structure is characterized by comprising a sealing track, a balance ring, an anti-rotating pin, low hysteresis brush sealing, an opening radial elastic ring, a wave spring and a sealing installation case, wherein the low hysteresis brush sealing which is formed by welding a rear plate, a front plate and a strand, is supported on the opening radial elastic ring and prohibited from rotating along the circumferential direction through the anti-rotating pin, the strand is closely pressed on the back plate under the effect of sealing pressure difference and is sealed in a contacting mode, and the outer diameter of the low hysteresis brush sealing is supported on the opening radial elastic ring and utilizes elasticity of pressure to the strand to enhance an effect. The floating brush sealing structure has the advantages of being mainly applied to secondary flow path gas sealing of a gas turbine engine, a steam turbine and a power turbine, can also be applied to the gas sealing of the other fans, or replacement of a labyrinth seal of a flow machine, or labyrinth sealing to reduce leakage loss, and is good in sealing effect.
Description
Technical field
The utility model relates to high temperature and high speed gas seal technology, particularly a kind of floating brush sealing configuration.
Background technique
Common " low lag behind " brush is sealed in engine high-temperature at a high speed during lower the use, often because hot, vibration, especially the rotor eccentricity moment that produces during aircraft maneuver and stator distortion, reach assembling decentraction generation excessive leakage and partial wear or bump mill with the backboard generation, for this reason, need to take to increase the gap and solve assembling decentraction and distortion, this not only will cause the rapid increase of leakage, and make wearing and tearing that the trend of further increase be arranged.
Common " the low hysteresis " brush is sealed under the working pressure effect, because the brush seal back plate is larger with the Friction load of brush tow, the effect of " the low hysteresis " can decrease.
" the low hysteresis " the brush sealing configuration that floats is owing to turn excessive leakage and the wear problem that stator off-centre causes the brush sealing to produce when solving the engine high-temperature high speed, the adverse effect of comparing hysteresis with common " the low hysteresis " brush sealing is reduced, brush sealing tow and sealed track rubbing surface have been reduced because the very large contact friction force that off-centre produces owing to floating simultaneously, and can keep sealing essentially concentric, therefore, this not only significantly reduces the wearing and tearing that seal, and the leakage of sealing can not increased because of the off-centre of work transfer stator.At present, also there are not similar floating brush sealing configuration and product.
The model utility content
The purpose of this utility model is in order to satisfy the sealing of high temperature and high speed gas, and the spy provides the floating brush sealing configuration.
The utility model provides a kind of floating brush sealing configuration, it is characterized in that: described floating brush sealing configuration comprises sealed track 1, gimbal 4, stop pin 5, " the low hysteresis " brush sealing 6, opening radial elastic ring 7, ripple spring 8, sealing holder housing 16;
Wherein: " low lag behind " brush sealing 6 by backboard 13, header board 14, tow 15 by being welded to form; Described " the low hysteresis " brush sealing 6 is to be supported on the opening radial elastic ring 7, forbids brushing sealing 6 by stop pin 5 and circumferentially rotates, and in seal pressure differential zone of high pressure 9, and low pressure area 2, be close on gimbal 4 shown in the gas flow direction 10 and under 8 effects of ripple spring; Described tow 15 closely is being pressed against under the seal pressure differential effect on the backboard 13, the contact sealing; Tow 15 reaches sealing in the cated sealing surface high speed contact friction of seal pressure differential effect and sealed track 1;
Described gimbal 4 adopts pressure balanced design with backboard 13 contacted surperficial 1 and the surface 2 18 of " the low hysteresis " brush sealing 6, and is coated with the self-lubricating coat in use of chromium carbide, Barium Fluoride and the calcirm-fluoride of high temperature anti-attrition, and two surfaces are through precise finish.
Described " the low hysteresis " brush sealing 6 external diameters are supported on the opening radial elastic ring 7, utilize pressure to the elasticity humidification of tow 15, the radical elasticity and gimbal 4 and the ripple spring 8 radial friction balancing the load that produces that keep " the low hysteresis " brush sealing 6 force in radial and opening radial elastic ring 7 make " the low hysteresis " brush sealing 6 relative sealed tracks 1 be in the eccentric state of minimum work to keep tow 15 circumferentially substantially even with the high-speed friction contact load of sealed track 1.
The friction surface that the backboard 13 of described " low lag behind " brush sealing 6 contact with tow 15 is coated with the self-lubricating coat in use 11 of the chromium carbide+Barium Fluoride of high temperature anti-attrition+calcirm-fluoride, in order to reduce hysteresis effect, the leakage of reduction dynamic gas.
Advantage of the present utility model:
Floating brush sealing configuration described in the utility model, be mainly used in the secondary stream gas seal of gas turbine engine, steam turbine, power turbine, also can be used for the gas seal of other blower fans or be used for the comb tooth of substitution fluid machinery and labyrinth seal to reduce leakage loss, sealing effect is good.
Description of drawings
Below in conjunction with drawings and the embodiments the utility model is described in further detail:
Fig. 1 is floating brush sealing configuration theory structure schematic representation;
Fig. 2 is the local theory structure schematic representation of floating brush sealing configuration;
Folded place is space (3) between gimbal (4) and " the low hysteresis " brush sealing (6), and tow (15) and the folded place of backboard (13) are slit (12).
Embodiment
Embodiment 1
Present embodiment provides a kind of floating brush sealing configuration, it is characterized in that: described floating brush sealing configuration comprises sealed track 1, gimbal 4, stop pin 5, " the low hysteresis " brush sealing 6, opening radial elastic ring 7, ripple spring 8, sealing holder housing 16;
Wherein: " low lag behind " brush sealing 6 by backboard 13, header board 14, tow 15 by being welded to form; Described " the low hysteresis " brush sealing 6 is to be supported on the opening radial elastic ring 7, forbids brushing sealing 6 by stop pin 5 and circumferentially rotates, and in seal pressure differential zone of high pressure 9, and low pressure area 2, be close on gimbal 4 shown in the gas flow direction 10 and under 8 effects of ripple spring; Described tow 15 closely is being pressed against under the seal pressure differential effect on the backboard 13, the contact sealing; Tow 15 reaches sealing in the cated sealing surface high speed contact friction of seal pressure differential effect and sealed track 1;
Described gimbal 4 adopts pressure balanced design with backboard 13 contacted surperficial 1 and the surface 2 18 of " the low hysteresis " brush sealing 6, and is coated with the self-lubricating coat in use of chromium carbide, Barium Fluoride and the calcirm-fluoride of high temperature anti-attrition, and two surfaces are through precise finish.
Described " the low hysteresis " brush sealing 6 external diameters are supported on the opening radial elastic ring 7, utilize pressure to the elasticity humidification of tow 15, the radical elasticity and gimbal 4 and the ripple spring 8 radial friction balancing the load that produces that keep " the low hysteresis " brush sealing 6 force in radial and opening radial elastic ring 7 make " the low hysteresis " brush sealing 6 relative sealed tracks 1 be in the eccentric state of minimum work to keep tow 15 circumferentially substantially even with the high-speed friction contact load of sealed track 1.
The friction surface that the backboard 13 of described " low lag behind " brush sealing 6 contact with tow 15 is coated with the self-lubricating coat in use 11 of the chromium carbide+Barium Fluoride of high temperature anti-attrition+calcirm-fluoride, in order to reduce hysteresis effect, the leakage of reduction dynamic gas.
Claims (1)
1. floating brush sealing configuration is characterized in that: described floating brush sealing configuration comprises sealed track (1), gimbal (4), stop pin (5), " the low hysteresis " brush sealing (6), opening radial elastic ring (7), ripple spring (8), sealing holder housing (16);
Wherein: " low lag behind " brush sealing (6) by backboard (13), header board (14), tow (15) by being welded to form; Described " the low hysteresis " brush sealing (6) is to be supported on the opening radial elastic ring (7), forbids brushing sealing (6) by stop pin (5) and circumferentially rotates, and tow (15) closely is being pressed against under the seal pressure differential effect on the backboard (13), and contact seals;
" the low hysteresis " brush sealing (6) external diameter is supported on the opening radial elastic ring (7), utilize pressure to the elasticity humidification of tow (15), keep radical elasticity and gimbal (4) and ripple spring (8) the radial friction balancing the load that produces of " the low hysteresis " brush sealing (6) force in radial and opening radial elastic ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220105212 CN202707152U (en) | 2012-03-20 | 2012-03-20 | Floating brush sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220105212 CN202707152U (en) | 2012-03-20 | 2012-03-20 | Floating brush sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707152U true CN202707152U (en) | 2013-01-30 |
Family
ID=47587461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220105212 Expired - Fee Related CN202707152U (en) | 2012-03-20 | 2012-03-20 | Floating brush sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707152U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359967A (en) * | 2019-07-19 | 2019-10-22 | 中国航发沈阳发动机研究所 | A kind of high pressure resistant difference brush seal installation |
| US10962117B2 (en) | 2017-12-18 | 2021-03-30 | Raytheon Technologies Corporation | Brush seal with spring-loaded backing plate |
-
2012
- 2012-03-20 CN CN 201220105212 patent/CN202707152U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10962117B2 (en) | 2017-12-18 | 2021-03-30 | Raytheon Technologies Corporation | Brush seal with spring-loaded backing plate |
| CN110359967A (en) * | 2019-07-19 | 2019-10-22 | 中国航发沈阳发动机研究所 | A kind of high pressure resistant difference brush seal installation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20160320 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |