CN202402085U - Comb-tooth honeycomb sealing structure - Google Patents
Comb-tooth honeycomb sealing structure Download PDFInfo
- Publication number
- CN202402085U CN202402085U CN2012200005196U CN201220000519U CN202402085U CN 202402085 U CN202402085 U CN 202402085U CN 2012200005196 U CN2012200005196 U CN 2012200005196U CN 201220000519 U CN201220000519 U CN 201220000519U CN 202402085 U CN202402085 U CN 202402085U
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- China
- Prior art keywords
- comb
- honeycomb
- tooth
- sealing structure
- steam
- 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
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- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides a comb-tooth honeycomb sealing structure. A gland sealing ring is arranged on the lower part of a gland sealing body; a yielding spring is arranged on the upper part of the gland sealing body; and a honeycomb belt is arranged on the lower part of the gland sealing ring. According to the comb-tooth honeycomb sealing structure provided by the utility model, the honeycomb belt is arranged on the lower part of the gland sealing ring of the existing comb-tooth sealing structure, the turbulent flow is reinforced, the steam is dispersed, the shearing force is weakened, the steam flow shock excitation is eliminated, breaking a rotor can not be damaged, and the efficiency of a steam turbine is improved. Therefore, the comb-tooth honeycomb sealing structure provided by the utility model is suitable for sealing the rotor and a stator of the steam turbine.
Description
Technical field
The utility model relates to the broach honeycomb seal structure body that is used for vapour or hermetic seal in a kind of turbomachinery.
Background technique
Mostly existing steam turbine seal ring is the labyrinth seal structure, and in the start and stop process, original rotor and stator just exist bloated poor, because the increase of leakage rate makes the further increase of difference of expanding.The short tooth and hair looks of axle convex platform and packing " falling platform " and long tooth occur by stretch bending and the phenomenon of " lodging " to displacement.The sealing effect of depending merely on the multistage throttle expansion just can not get guaranteeing that a large amount of steam more can leak out from gap location, reduce the economic performance of unit.
If the gap adjustment is less, when tooth with axle friction took place, moment produced a large amount of heat.At the corresponding axle upper groove place of the long tooth of packing, heat has little time to distribute, and this place's diameter is again little, just might cause the local superheating of axle and causes permanent bending of rotor, the safety of danger side of body unit.So during unit maintenance, people often have to transfer radial clearance big, would rather let steam leakage also be reluctant to produce the sound friction, are the safety that cost is guaranteed unit to sacrifice economic benefit consequently.
Summary of the invention
The purpose of the utility model provides a kind of honeycomb seal structure that can avoid some drawbacks of broach packing.
Technological scheme: be provided with labyrinth ring in the labyrinth casing bottom, labyrinth casing top is equipped with the yielding spring, in the labyrinth ring bottom cellular band is housed.
Good effect, the utility model is provided with cellular band in the bottom of existing broach gland seal structure body labyrinth ring, can strengthen flow-disturbing, and dispersion steam is subdued shearing, eliminates steam flow excitation, does not hinder rotor, improves turbine efficiency.Suitable to turbine rotor and seal stator application.
Description of drawings
Fig. 1 is existing labyrinth seal structure schematic representation
Fig. 2 is a broach honeycomb seal structure body schematic representation
Among the figure, 1. make a concession spring, 2. labyrinth casing, 3. labyrinth ring, 4. cellular band.
Embodiment
Existing broach gland seal structure: the bottom of labyrinth casing 2 is a labyrinth ring 3, and labyrinth casing top is connected with makes a concession spring 1, and labyrinth ring is provided with long tooth and short tooth, and labyrinth ring is installed between rotor and the stator.
Broach Honeycomb steam seal structure: be provided with labyrinth ring 3 in labyrinth casing 2 bottoms, labyrinth casing top is equipped with makes a concession spring 1, in the labyrinth ring bottom cellular band 4 is housed.
The Honeycomb steam seal structure that is constituted is arranged between turbine rotor and the stator, uses as packing.
The utility model is that the short tooth with original broach packing removes, at former short tooth position soldering cellular band, and other size constancies, the long tooth of former broach packing keeps.
In the utility model broach Honeycomb steam seal structure, each honeycomb hole has strengthened the flow-disturbing effect, and steam is distributed to each honeycomb chamber, can cut down the shearing of steam, to reach the effect of eliminating steam flow excitation; And the cellular band quality is softer, also can not injure rotor even bump mill with rotor, can come the Installation and Debugging packing according to the lower limit of labyrinth clearance standard, thereby improve turbine efficiency.
Claims (1)
1. broach honeycomb seal structure body is characterized in that: be provided with labyrinth ring (3) in labyrinth casing (2) bottom, labyrinth casing top is equipped with makes a concession spring (1), and cellular band (4) is housed in the labyrinth ring bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200005196U CN202402085U (en) | 2012-01-04 | 2012-01-04 | Comb-tooth honeycomb sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200005196U CN202402085U (en) | 2012-01-04 | 2012-01-04 | Comb-tooth honeycomb sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202402085U true CN202402085U (en) | 2012-08-29 |
Family
ID=46699736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200005196U Expired - Fee Related CN202402085U (en) | 2012-01-04 | 2012-01-04 | Comb-tooth honeycomb sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202402085U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559199A (en) * | 2017-10-19 | 2018-01-09 | 西安热工研究院有限公司 | A kind of contact type sealing structure suitable for supercritical carbon dioxide compressor set |
| CN114033502A (en) * | 2021-11-10 | 2022-02-11 | 北京动力机械研究所 | Low-leakage high-reliability radial flow turbocharging system rotor sealing structure |
| CN114060104A (en) * | 2021-11-10 | 2022-02-18 | 北京动力机械研究所 | Stepped high-reliability long-life sealing structure for rotor of turbocharging system |
-
2012
- 2012-01-04 CN CN2012200005196U patent/CN202402085U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559199A (en) * | 2017-10-19 | 2018-01-09 | 西安热工研究院有限公司 | A kind of contact type sealing structure suitable for supercritical carbon dioxide compressor set |
| CN114033502A (en) * | 2021-11-10 | 2022-02-11 | 北京动力机械研究所 | Low-leakage high-reliability radial flow turbocharging system rotor sealing structure |
| CN114060104A (en) * | 2021-11-10 | 2022-02-18 | 北京动力机械研究所 | Stepped high-reliability long-life sealing structure for rotor of turbocharging system |
| CN114033502B (en) * | 2021-11-10 | 2023-09-12 | 北京动力机械研究所 | Low-leakage high-reliability rotor sealing structure of radial-flow turbocharging system |
| CN114060104B (en) * | 2021-11-10 | 2023-12-19 | 北京动力机械研究所 | Stepped high-reliability long-service-life sealing structure for rotor of turbocharging system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20180104 |