CN203114357U - Brush type seal - Google Patents
Brush type seal Download PDFInfo
- Publication number
- CN203114357U CN203114357U CN 201320066292 CN201320066292U CN203114357U CN 203114357 U CN203114357 U CN 203114357U CN 201320066292 CN201320066292 CN 201320066292 CN 201320066292 U CN201320066292 U CN 201320066292U CN 203114357 U CN203114357 U CN 203114357U
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- CN
- China
- Prior art keywords
- mentioned
- brush
- plate
- outer rim
- backboard
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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.)
- Withdrawn - After Issue
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a brush type seal which comprises a front baffle, a rear baffle, a balance plate, a middle plate and a brush wire assembly, wherein the balance plate, the middle plate and the brush wire assembly are arranged between the front baffle and the rear baffle in sequence from front to back, an air inlet is formed in the balance plate, the brush wire assembly comprises a brush wire tow arranged between the middle plate and the rear baffle, the inner edge of the front baffle, the inner edge of the balance plate, the inner edge of the middle plate and the inner edge of the rear baffle are aligned, the outer edge of the balance plate is longer than the outer edge of the front baffle and the outer edge of the middle plate, the air inlet is formed in a part, exposed from the front baffle and the middle plate, of the balance plate, the outer edge of the rear baffle is longer than the outer edge of the front baffle and the outer edge of the middle plate, the root of the brush wire tow is welded between the rear baffle and the middle plate, and the edge of the brush wire tow is longer than the outer edge of the balance plate and the outer edge of the rear baffle. The brush type seal solves the problem of circumferential leakage between a brush and a rotor and greatly improves the sealing effect.
Description
Technical field
The utility model relates to a kind of brush seal, is specifically related to a kind of brush seal that can reduce circumferential leakage.
Background technique
Have the gap between the rotor of steam turbine and the stator, working medium is always passed through clearance leakage, thereby brings energy loss.Revealing loss is the important component part of steam turbine internal losses, reduce and reveal the internal efficiency that loss can increase substantially steam turbine, brush seal is a kind of efficient damping sealing that developed recently gets up, it is by the brush softness of tow own and rubber-like characteristics, realize that flexible contact reaches sealing purpose, still for the consideration of unit safety, the free end of brush tow can only guarantee the contact of suitable degree, excessive contact can influence running, so still can produce certain circumferential leakage.
The model utility content
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of brush seal that can effectively reduce circumferential leakage.
In order to realize above-mentioned target, the utility model adopts following technological scheme:
A kind of brush seal comprises: front screen and backboard also comprise: be successively set on balance plate, intermediate plate, brush silk assembly between front screen and the backboard from front to back; Balance plate is provided with inlet hole, and brush silk assembly comprises: be arranged on the brush tow between intermediate plate and the backboard; The inner edge alignment of front screen, balance plate, intermediate plate and backboard, the outer rim of balance plate exceeds the outer rim of front screen and intermediate plate, inlet hole is formed at the part that balance plate exposes front screen and intermediate plate, the outer rim of backboard exceeds the outer rim of front screen and intermediate plate, brush the root weld of tow between backboard and intermediate plate, the outer rim of its outer rim over balance plate and backboard.
Aforesaid brush seal is characterized in that, the outer rim alignment of front screen and intermediate plate.
Aforesaid brush seal is characterized in that, the outer rim alignment of balance plate and backboard.
Aforesaid brush seal is characterized in that, brush silk assembly also comprises the aft cover plate that is fixed in the above-mentioned brush tow.
Aforesaid brush seal is characterized in that, the outer rim of aft cover plate exceeds the outer rim of above-mentioned balance plate and backboard.
Usefulness of the present utility model is: further strengthened the effect that brush tow barrier air flows by aft cover plate, and the comprehensive function by balance plate and aft cover plate, air-flow by inlet hole is turned to provides reverse convection current to increase the circumferential reaction force of air-flow, offset part and cause the air-flow of circumferential leakage, thereby increase sealing effect.
Description of drawings
Fig. 1 is the structural representation of a preferred embodiment of brush seal of the present utility model.
The implication of reference character among the figure:
1, front screen, 2, balance plate, 3, intermediate plate, 4, the brush tow, 5, backboard, 6, aft cover plate, 7, inlet hole
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done concrete introduction.
With reference to shown in Figure 1, a kind of brush seal comprises: front screen 1, backboard 5, balance plate 2, intermediate plate 3, brush silk assembly.
As a kind of preferred version, brush silk assembly comprises: be arranged on the brush tow 4 between intermediate plate and the backboard and be fixed on the aft cover plate of brushing in the tow 46.The effect of aft cover plate 6 is further to replenish the effect of blocking of brush tow 4, aft cover plate 6 is in order to cooperate the brush tow, therefore it also should adopt and have certain flexible material and make, its root and brush tow 4 root weld together, its outer rim is alignd with the outer rim of brushing tow.
As everyone knows, owing to need between rotor and stator, constitute sealing, so brush seal often is loop configuration, a perhaps segmental arc in the first looping structure, and then assemble.
So front screen 1, backboard 5, balance plate 2, intermediate plate 3 are a part of segmental arc of loop configuration or loop configuration.
As shown in Figure 1, with regard to the inner edge of brush seal integral body, the inner edge of front screen 1, backboard 5, balance plate 2, intermediate plate 3 all aligns, and is convenient to the installation of brush seal inner edge like this.
With regard to the outer rim of brush seal integral body, in order to realize sealing function, the outer rim of front screen 1 and intermediate plate 3 should not blocked balance plate 2 formed inlet holes 7, so, the outer rim that the outer rim of balance plate 2 should exceed front screen 1 also will surpass the outer rim of intermediate plate 3, be the outer rim that the outer rim of balance plate 2 exceeds front screen 1 and intermediate plate 3, the part that exceeds at balance plate 2 forms inlet hole 7, that is to say that inlet hole 7 is not blocked by front screen 1 and intermediate plate 3.
As a kind of preferred version, the alignment of the outer rim of front screen 1 and intermediate plate 3.
Need to prove that the effect of intermediate plate 3 is: leave certain space between balance plate 2 and the brush silk 4, form equilibrium region, make the air-flow by inlet hole 7 have the space that turns to balance.
The effect of backboard 5 is to the certain support of brush tow 4, but brush tow 4 still will exceed backboard 5 and could realize contacting seal action with balance plate 2, so and backboard 5 is not to be to contact the outer rim that their outer rim of sealing configuration should not surpass brush tow 4 with balance plate 2.Brush the root weld of tow 4 between backboard and intermediate plate, the outer rim of its outer rim over balance plate and backboard.
In above scheme, because the existence of inlet hole 7, be subjected to brushing blocking of tow 4 and aft cover plate 6 after making air-flow enter the equilibrium region at intermediate plate 3 places, air-flow is stagnated this place's air pressure is strengthened, and form reverse convection current at the outer rim place of balance plate, thereby balance plate 2 on high-tension side air pressure obtain counteracting to a certain degree, namely reduce to produce the power of circumferentially revealing, reduce circumferential leakage, increased sealing effect.
More than show and described basic principle of the present utility model, major character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technological scheme that the mode of equivalent transformation obtains, all drops in the protection domain of the present utility model.
Claims (5)
1. brush seal comprises: front screen and backboard, it is characterized in that, and also comprise: be successively set on balance plate, intermediate plate, brush silk assembly between above-mentioned front screen and the backboard from front to back; Above-mentioned balance plate is provided with inlet hole, and above-mentioned brush silk assembly comprises: the brush tow between above-mentioned intermediate plate and the backboard is set; The inner edge alignment of above-mentioned front screen, balance plate, intermediate plate and backboard, the outer rim of above-mentioned balance plate exceeds the outer rim of above-mentioned front screen and intermediate plate, above-mentioned inlet hole is formed at above-mentioned balance plate and exposes the part of above-mentioned front screen and intermediate plate, the outer rim of above-mentioned backboard exceeds the outer rim of above-mentioned front screen and intermediate plate, the root weld of above-mentioned brush tow is between above-mentioned backboard and intermediate plate, and its outer rim exceeds the outer rim of above-mentioned balance plate and backboard.
2. brush seal according to claim 1 is characterized in that, the outer rim alignment of above-mentioned front screen and intermediate plate.
3. brush seal according to claim 1 is characterized in that, the outer rim alignment of above-mentioned balance plate and backboard.
4. according to any described brush seal of claim 1 to 3, it is characterized in that above-mentioned brush silk assembly also comprises the aft cover plate that is fixed in the above-mentioned brush tow.
5. brush seal according to claim 4 is characterized in that, the outer rim of above-mentioned aft cover plate exceeds the outer rim of above-mentioned balance plate and backboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066292 CN203114357U (en) | 2013-02-05 | 2013-02-05 | Brush type seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066292 CN203114357U (en) | 2013-02-05 | 2013-02-05 | Brush type seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114357U true CN203114357U (en) | 2013-08-07 |
Family
ID=48894716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320066292 Withdrawn - After Issue CN203114357U (en) | 2013-02-05 | 2013-02-05 | Brush type seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114357U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104297A (en) * | 2013-02-05 | 2013-05-15 | 江苏透平密封高科技有限公司 | Brush type seal |
| CN105275505A (en) * | 2014-06-09 | 2016-01-27 | 斗山重工业株式会社 | Brusch seal assembly |
-
2013
- 2013-02-05 CN CN 201320066292 patent/CN203114357U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104297A (en) * | 2013-02-05 | 2013-05-15 | 江苏透平密封高科技有限公司 | Brush type seal |
| CN105275505A (en) * | 2014-06-09 | 2016-01-27 | 斗山重工业株式会社 | Brusch seal assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU TURBINE SEAL HIGH-TECHNOLOGY CO., LTD. Free format text: FORMER NAME: JIANGSU TURBINE SEAL HIGH-TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 210046, Nanjing District, Jiangsu City, Qixia Province, Gan home, 108 East, Nanjing Golden Port (state) Science Park 6 Patentee after: Jiangsu Turbine Seal High-Technology Co., Ltd. Address before: 210046, Nanjing District, Jiangsu City, Qixia Province, Gan home, 108 East, Nanjing Golden Port (state) Science Park 6 Patentee before: Jiangsu Turbine Seal High-Technology Co., Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Brush type seal Effective date of registration: 20141120 Granted publication date: 20130807 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Jiangsu Turbine Seal High-Technology Co., Ltd. Registration number: 2014320000016 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130807 Effective date of abandoning: 20150708 |
|
| RGAV | Abandon patent right to avoid regrant | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170622 Granted publication date: 20130807 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Jiangsu Turbine Seal High-Technology Co., Ltd. Registration number: 2014320000016 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |