CN205578042U - Brush seal subassembly - Google Patents
Brush seal subassembly Download PDFInfo
- Publication number
- CN205578042U CN205578042U CN201620387477.4U CN201620387477U CN205578042U CN 205578042 U CN205578042 U CN 205578042U CN 201620387477 U CN201620387477 U CN 201620387477U CN 205578042 U CN205578042 U CN 205578042U
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- CN
- China
- Prior art keywords
- brush
- rotor
- vapor seal
- utility
- model
- 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)
Abstract
The utility model provides a brush seal subassembly belongs to seal assembly technical field. The utility model discloses a gland casing, vapor seal and rotor, the vapor seal sets up between rotor and gland casing, is equipped with the gland casing groove in the gland casing, and the upper portion of vapor seal is equipped with the circular bead, and circular bead setting on the vapor seal is at the gland casing inslot, the utility model discloses still restraint including the brush, the lower part that sets up the vapor seal between vapor seal and rotor is restrainted to the brush. The utility model discloses restraint by the brush and has replaced traditional rigidity vapor seal tooth, make " vapor seal tooth " become soft, restraint to take place to bump with the rotor when the brush and can make a concession at will when grinding, use that the brush was restrainted can with steam turbine vapor seal and rotor clearance within a definite time do littleer. Usually, 0.35~0.70mm can only be accomplished to the clearance minimum between vapor seal and rotor, and the utility model discloses 0.1~0.20mm in the clearance between possible vapor seal of brush vapor seal and rotor. Produce turbulent effect when brush layer that the steam medium was restrainted through the brush, the steam velocity of flow reduces at once, lets out leakage quantity promptly and reduces.
Description
Technical field
This utility model relates to a kind of brush seal assembly, belongs to black box technical field.
Background technology
Existing gland sealing gear forms multiple annular compartment when steam turbine operation around rotor surface, and steam meson passes through packing
The throttling in the gap between tooth and rotor surface, and carry out energy by expansion in the chamber that two adjacent teeth of packing are formed
Conversion, steam is because the continuous conversion of energy after multiple gland sealing gears, and heat energy is converted into the ability of kinetic energy and minimizes,
To reaching to block or reduce the purpose that steam meson is revealed.
Because the rotor oscillation that a variety of causes produces makes the gap between packing and rotor increase, the effect fall of throttling-expansion
Low, the kinetic energy of steam meson reduces amplitude and reduces, i.e. the amount of leakage of steam meson increases.Gland-packing leakage has had a strong impact on vapour
The thermal efficiency of wheel unit.
Summary of the invention
The purpose of this utility model is that the rotor produced to solve the problem that above-mentioned prior art exists, i.e. a variety of causes shakes
Moving makes the gap between packing and rotor increase, and the effect of throttling-expansion reduces, and the kinetic energy of steam meson reduces amplitude and subtracts
Little, i.e. the amount of leakage of steam meson increases.Gland-packing leakage has had a strong impact on the thermal efficiency of Steam Turbine and then provides one
Brush seal assembly.
The purpose of this utility model is achieved through the following technical solutions:
A kind of brush seal assembly, including labyrinth casing, packing and rotor, described packing be arranged on rotor and labyrinth casing it
Between, it being provided with labyrinth casing groove in labyrinth casing, the top of packing is provided with shoulder, and the shoulder on packing is arranged in labyrinth casing groove,
Also include brush bundle, the bottom of the packing that described brush bundle is arranged between packing and rotor.
This utility model be instead of traditional rigidity gland sealing gear by brushing bundle, makes " gland sealing gear " to become soft, as brush Shu Yuzhuan
Son can arbitrarily be made a concession when touching mill, and it is less that the gap between turbine steam seal and rotor can be done by the use of brush bundle.Logical
Often, the gap minimum between packing and rotor can only accomplish 0.35～0.70mm, and this utility model brush steam seal can be accomplished
Gap 0.1～0.20mm between packing and rotor.Turbulence effect, steam is produced by brush when the layers of brush bristles that steam medium is restrainted
Flow velocity reduces at once, i.e. leakage rate reduces.From steam turbine operation characteristic analysis, brush steam seal is relatively specific for low pressure (LP) cylinder portion
Point, the High Temperature High Pressure of relatively high intermediate pressure cylinder, in low pressure (LP) cylinder the temperature of steam medium, pressure reduce very big, so ratio
Relatively it is suitable for using brush steam seal.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing black box.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the structural representation of this utility model brush seal assembly.
Fig. 4 is the structural representation of brush bundle 4.
Fig. 5 is the working state schematic representation of bristle in brush bundle 4.
In Fig. 2, Fig. 3, arrow indication is steam flow direction.
Reference in figure, 1 is labyrinth casing, and 2 is packing, and 3 is rotor, and 4 is brush bundle, and 5 is labyrinth casing groove, and 6 are
Shoulder.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail: the present embodiment is with this utility model technology
Implement under premised on scheme, give detailed embodiment, but protection domain of the present utility model is not limited to following
Embodiment.
As shown in Fig. 3～Fig. 5, a kind of brush seal assembly involved by the present embodiment, including: labyrinth casing 1, packing 2 and
Rotor 3, described packing 2 is arranged between rotor 3 and labyrinth casing 1, is provided with labyrinth casing groove 5 in labyrinth casing 1, packing 2 upper
Portion is provided with shoulder 6, and the shoulder 6 on packing 2 is arranged in labyrinth casing groove 5, also includes that brush bundle 4, described brush bundle 4 are arranged on vapour
The bottom of the packing 2 between envelope 2 and rotor 3.
Described brush bundle 4 is made up of bristle stacking, and the line footpath of described bristle is 0.07mm, and the thickness of described brush bundle 4 is
1mm, a length of the 12～15mm of described brush bundle 4, the width of described brush bundle 4 and packing 2 brush bundle 4 installation sites above
Girth is identical.
Described bristle is made up of cobalt-based nickel alloy material.
The above, only this utility model preferably detailed description of the invention, these detailed description of the invention are all based on this reality
By the different implementations under novel general idea, and protection domain of the present utility model is not limited thereto, any ripe
Know those skilled in the art in the technical scope that this utility model discloses, the change that can readily occur in or replacement,
All should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with claim
The protection domain of book is as the criterion.
Claims (3)
1. a brush seal assembly, including: labyrinth casing (1), packing (2) and rotor (3), described packing (2) is arranged between rotor (3) and labyrinth casing (1), labyrinth casing groove (5) it is provided with in labyrinth casing (1), the top of packing (2) is provided with shoulder (6), shoulder (6) on packing (2) is arranged in labyrinth casing groove (5), it is characterized in that, also include that brush bundle (4), described brush bundle (4) are fixed on the bottom of packing (2).
Brush seal assembly the most according to claim 1, it is characterized in that, described brush bundle (4) is made up of bristle stacking, the line footpath of described bristle is 0.07mm, the thickness of described brush bundle (4) is 1mm, a length of the 12～15mm of described brush bundle (4), the width of described brush bundle (4) is identical with the girth that packing (2) brushes bundle (4) installation site above.
Brush seal assembly the most according to claim 2, it is characterised in that described bristle is made up of cobalt-based nickel alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620387477.4U CN205578042U (en) | 2016-04-29 | 2016-04-29 | Brush seal subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620387477.4U CN205578042U (en) | 2016-04-29 | 2016-04-29 | Brush seal subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205578042U true CN205578042U (en) | 2016-09-14 |
Family
ID=56859168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620387477.4U Expired - Fee Related CN205578042U (en) | 2016-04-29 | 2016-04-29 | Brush seal subassembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205578042U (en) |
Cited By (2)
| 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 |
| CN110130997A (en) * | 2019-05-10 | 2019-08-16 | 华电电力科学研究院有限公司 | A kind of Turbine Steam seal structure that can axially make a concession and its working method |
-
2016
- 2016-04-29 CN CN201620387477.4U patent/CN205578042U/en not_active Expired - Fee Related
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 |
| CN110130997A (en) * | 2019-05-10 | 2019-08-16 | 华电电力科学研究院有限公司 | A kind of Turbine Steam seal structure that can axially make a concession and its working method |
| CN110130997B (en) * | 2019-05-10 | 2023-12-05 | 华电电力科学研究院有限公司 | Steam turbine gland sealing structure capable of axially yielding and working method thereof |
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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: 20160914 Termination date: 20190429 |