CN206338094U - F type contrate bicavate brush steam seals - Google Patents
F type contrate bicavate brush steam seals Download PDFInfo
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- CN206338094U CN206338094U CN201621481368.5U CN201621481368U CN206338094U CN 206338094 U CN206338094 U CN 206338094U CN 201621481368 U CN201621481368 U CN 201621481368U CN 206338094 U CN206338094 U CN 206338094U
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- brush
- contrate
- seal
- wire bundle
- bicavate
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Abstract
The utility model discloses F type contrate bicavate brush steam seals, it is characterised in that the brush steam seal includes front apron（1）, backboard（2）, fixed area（3）And brush wire bundle（8）, the both sides of the brush wire bundle are respectively arranged with front apron and backboard；The technical scheme eliminates and reduced the brush filament rigidifying effect and brush filament hysteresis effect of conventional brush seal, keep the excellent seal performance of brush seal and the service life of extension brush seal, many twice of F type contrate bicavates brush steam seal symmetrically hinder vapour tooth and two symmetrical chambers.Result of the test shows that two symmetrical chambers greatly reduce brush filament and the frictional force of backboard, reduce the rigidity of brush filament.Thus, Novel brush type seal can more adapt to axle offset or lifting speed change, with better seal characteristic and longer service life.
Description
Technical field
The utility model is related to a kind of F types contrate bicavate brush steam seal, belongs to brush seal structure component technology field.
Background technology
Brush seal is one of key technology of modern advanced turbomachinery development, applied to aero-engine, work
The turbomachine such as industry gas turbine and steam turbine.Brush seal can keep seal clearance not after rotor moment significantly radial displacement
Become.Its leakage rate is 1/ 5~the 1/ 10 of labyrinth seal, engine oil consumption rate is reduced about 2 %, and can improve rotor operation
Stability.With the structural adjustment of China's power industry, develop, production and development supercritical pressure generating units are thermal power generation sections
About the energy, improve environmental protection, improve generating efficiency, reduce cost of electricity-generating inexorable trend.
In nearest more than 20 years, the flow passage component of steam turbine has many improvement, performance in the case where calculating the promotion of fluid
There is a certain degree of raising, but with the raising of turbine steam condition, leakage losses turns into restriction turbine efficiency and improved
Main factor, reduce leakage loss become improve turbine efficiency important measures.According to statistics, in each of stage
In item loss, leakage losses accounts for leakage losses at the top of the 29% of grade total losses, movable vane and then accounts for the 80% of total leakage losses.It is than quiet
The profile loss or secondary flow loss of leaf or movable vane are also big, and the latter only accounts for the 15% of grade total losses.Face in addition, modern high power is super
Boundary's steam turbine, due to the raising of pressure, the increase of stage head, the unstable power of steam flow may be such that unit occurs from exciting
It is dynamic.Peak load regulation, frequency modulation, market competition, the transformation of old unit design, the reliability and economy for being required to sealing system are carried significantly
It is high.Compared with wide variety of traditional comb tooth sealing (labyrinth sealing), brush seal has excellent sealing property.It is also
Have the advantages that caloric value is low, service procedure simple, long service life and have damping action to rotor axial system.Brush seal is to improving
Aero-engine and ground gas turbine, steam turbine, the performance of compressor have great potentiality, and it is the best of comb tooth sealing
Regeneration product.Conventional brush steam seal is by upper lantern, lower lantern and clamps compact arranged brush filament therebetween and constitutes.Experiment
Research finds that conventional brush seal is in axle offset or raising speed, and under gas pressure effect, the frictional force between brush filament and backboard makes
Brush ring brush filament can not be followed immediately, and this phenomenon is referred to as brush filament rigidifying effect.Rigidifying effect can accelerate the abrasion of brush filament and runway, drop
The sealing property of low brush seal and reduction of service life.After brush filament is radially elapsed by runway, when axle departs from skew or reduction of speed
When, due to the frictional force between brush filament and backboard, brush filament can not be restored immediately, and brush filament is hung.It is delayed that this phenomenon is referred to as brush filament
Effect.Hysteresis effect can increase the gas leakage of brush seal.The rigidifying and hysteresis effect of conventional brush seal are only occurred from
Axle abnormal moment.Those skilled in the art has attempted to solve the scheme of the problem, but the program never has and obtained
Solve well.
Utility model content
There is provided a kind of F types contrate bicavate is brush exactly for technical problem present in prior art for the utility model
Packing, the technical scheme eliminates and reduced the brush filament rigidifying effect and brush filament hysteresis effect of conventional brush seal, keeps brush close
The service life of the excellent seal performance of envelope and extension brush seal, many twice of F type contrate bicavates brush steam seal symmetrically hinder
Vapour tooth and two symmetrical chambers.Result of the test shows that two symmetrical chambers greatly reduce brush filament and the frictional force of backboard, drop
The low rigidity of brush filament.Thus, Novel brush type seal can more adapt to axle offset or lifting speed change, with better seal characteristic
With longer service life.
To achieve these goals, the technical solution of the utility model is as follows：A kind of F types contrate bicavate brush steam seal,
Characterized in that, the brush steam seal includes front apron, backboard, fixed area and brush wire bundle, the both sides point of the brush wire bundle
Front apron and backboard are not provided with it.
As a kind of improvement of the present utility model, the front apron includes preceding resistance vapour tooth and preceding contrate, after backboard includes
Vapour tooth and rear contrate are hindered, the preceding contrate and rear contrate are set to F types.
As a kind of improvement of the present utility model, the forward and backward baffle plate and brush wire bundle external diameter root pass through electron beam welder
Skill is welded on fixed area.
As a kind of improvement of the present utility model, the preceding contrate, the top of rear contrate form two with brush wire bundle respectively
Non-close chamber, and the friction that do not produce that is not in contact with each other, sealing hysteresis effect can be reduced in axle shifting or raising speed.
As a kind of improvement of the present utility model, the preceding resistance vapour tooth and the rear vapour transverse tooth thickness degree that hinders are not more than 0.4mm, highly not
More than preceding contrate or rear contrate；Preceding contrate and rear contrate thickness are not more than 0.5mm, highly no more than brush wire bundle, and apart from brush filament
Beam minimum range is 0.2mm.
As a kind of improvement of the present utility model, the thickness of the brush wire bundle is adjustable.Brush steam seal gross thickness is 13mm, brush
Tow thickness can be 1mm, 0.8mm, 1.2mm, and thickness is depended on brush envelope and selected using position and silk material, brush wire bundle thickness change
Amount will be shared out equally correspondingly to forward and backward baffle plate, to keep brush steam seal gross thickness constant.
Relative to prior art, advantage of the present utility model is as follows：1）The technical scheme global design is ingenious, simple in construction
Rationally, sealing is greatly enhanced；2）Novel brush type seal in the technical scheme is first using the sealed mould of " four teeth and a brush "
Formula, effectively enhances sealing effectiveness；3）The technical scheme is effectively reduced steam pressure；Two chambers are not in contact with each other with brush wire bundle
Friction is not produced, and sealing hysteresis effect can be reduced in axle shifting or raising speed；4）The technical scheme suitable for high pressure, pressure and
Low pressure packing, cost is relatively low, has wide range of applications.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
In figure：1st, front apron, 2, backboard, 3, fixed area, 4, preceding resistance vapour tooth, 5, rear resistance vapour tooth, 6, preceding contrate, 7, rear horizontal
Tooth, 8, brush wire bundle.
Embodiment
The utility model is further described with embodiment with reference to Figure of description, but the embodiment is only used for this reality
With new rather than limitation the utility model.
Embodiment 1：
Referring to Fig. 1, a kind of F types contrate bicavate brush steam seal, the brush steam seal symmetrical configuration, axial gross thickness are
13mm, the brush steam seal includes front apron 1, backboard 2, fixed area 3 and brush wire bundle 8, and the both sides of the brush wire bundle are distinguished
Front apron and backboard are provided with, the front apron includes preceding resistance vapour tooth 4 and preceding contrate 6, and backboard 2 hinders the He of vapour tooth 5 after including
Contrate 7 afterwards, the preceding contrate 6 and rear contrate 7 are set to F types；Forward and backward baffle plate and brush wire bundle the external diameter root passes through electron beam
Welding is welded on fixed area.
Embodiment 2：Referring to Fig. 1, a kind of improvement of the present utility model, the preceding contrate 6, the upper part of rear contrate 7 are used as
Not with the two non-close chambers of formation of brush wire bundle 8, and the friction that do not produce that is not in contact with each other, it can reduce close in axle shifting or raising speed
Seal hysteresis effect.
Embodiment 3：Referring to Fig. 1, as a kind of improvement of the present utility model, the preceding resistance vapour tooth 4 hinders the thickness of vapour tooth 5 with rear
No more than 0.4mm, highly no more than preceding contrate 6 or rear contrate 7；Preceding contrate 6 and rear contrate 7 thickness is not more than 0.5mm, and height is not
It is 0.2mm more than brush wire bundle 8, and apart from the minimum range of brush wire bundle 8.Preceding resistance vapour tooth 4 or rear resistance vapour tooth 5 according to rotor shapes come
With height, to reach best clearance and sealing effectiveness；The effect of preceding resistance vapour tooth 4 is reduction steam pressure, protection chamber and brush filament
Beam 8.Preceding contrate 6, the top of rear contrate 7 and the two non-close chambers of formation of brush wire bundle 8.Remaining structure and advantage and embodiment 1 are complete
It is exactly the same.
The utility model can also combine at least one in technical characteristic described in embodiment 2,3 with embodiment 1 to be formed
New embodiment.
It should be noted that above-described embodiment is only preferred embodiment of the present utility model, it is not for limiting this reality
With new protection domain, the equivalent or replacement made on the basis of the above belong to protection model of the present utility model
Enclose, protection domain of the present utility model is defined by claims.
Claims (6)
1. a kind of F types contrate bicavate brush steam seal, it is characterised in that the brush steam seal includes front apron（1）, backboard
（2）, fixed area（3）And brush wire bundle（8）, the both sides of the brush wire bundle are respectively arranged with front apron and backboard.
2. F types contrate bicavate brush steam seal according to claim 1, it is characterised in that the front apron includes preceding resistance
Vapour tooth（4）With preceding contrate（6）, backboard（2）Including rear resistance vapour tooth（5）With rear contrate（7）, the preceding contrate（6）With rear contrate
（7）It is disposed as F types.
3. F types contrate bicavate brush steam seal according to claim 2, it is characterised in that the forward and backward baffle plate and brush filament
Beam external diameter root is welded on fixed area by electron beam Welding.
4. the F type contrate bicavate brush steam seals according to Claims 2 or 3, it is characterised in that the preceding contrate（6）, after
Contrate（7）Top respectively with brush wire bundle（8）Form two non-close chambers, and the friction that do not produce that is not in contact with each other.
5. F types contrate bicavate brush steam seal according to claim 4, it is characterised in that resistance vapour tooth before described（4）With it is rear
Hinder vapour tooth（5）Thickness is not more than 0.4mm, highly no more than preceding contrate（6）Or rear contrate（7）；Preceding contrate（6）With rear contrate（7）
Thickness is not more than 0.5mm, highly no more than brush wire bundle（8）, and apart from brush wire bundle（8）Minimum range is 0.2mm.
6. F types contrate bicavate brush steam seal according to claim 4, it is characterised in that the brush wire bundle（8）Thickness
It is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621481368.5U CN206338094U (en) | 2016-12-30 | 2016-12-30 | F type contrate bicavate brush steam seals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621481368.5U CN206338094U (en) | 2016-12-30 | 2016-12-30 | F type contrate bicavate brush steam seals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206338094U true CN206338094U (en) | 2017-07-18 |
Family
ID=59303660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621481368.5U Active CN206338094U (en) | 2016-12-30 | 2016-12-30 | F type contrate bicavate brush steam seals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206338094U (en) |
Cited By (1)
| 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 |
-
2016
- 2016-12-30 CN CN201621481368.5U patent/CN206338094U/en active Active
Cited By (1)
| 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 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
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: 223112 Jiangsu Hongze Huaian County Economic Development Zone Science and Technology Pioneer Park 12 Patentee before: Jiangsu Sunray Technology Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |