CN201460995U - High-pressure resistant and high-sealability shaft brush type steam seal of steam turbine - Google Patents
High-pressure resistant and high-sealability shaft brush type steam seal of steam turbine Download PDFInfo
- Publication number
- CN201460995U CN201460995U CN2009200998116U CN200920099811U CN201460995U CN 201460995 U CN201460995 U CN 201460995U CN 2009200998116 U CN2009200998116 U CN 2009200998116U CN 200920099811 U CN200920099811 U CN 200920099811U CN 201460995 U CN201460995 U CN 201460995U
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- brush formula
- seal ring
- brush
- segmental arc
- steam seal
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- Sealing Devices (AREA)
Abstract
The utility model relates to a high-pressure resistant and high-sealability shaft brush type steam seal of a steam turbine. In the technical scheme, the inner cylindrical surface of the stator of a steam turbine is provided with a groove along the periphery thereof, a brush type steam sealing ring which consists of a plurality of arc-shaped sections is arranged in the groove, the inner cylindrical surface of the brush type steam sealing ring is provided with one or a plurality of circle(s) of arc-shaped groove(s) along the periphery thereof, a circle of brush type steam sealing piece is arranged in each circle of arc-sectioned groove, the two sides of the each brush type steam sealing piece are respectively provided with a high-pressure side clamping plate and a low-pressure side clamping plate, the inner cylindrical surface of each arc-shaped section of the steam sealing ring is provided with a protruding shoulder which closely clings to the low-pressure side clamping plates of the brush type steam sealing pieces in one row, and the protruding shoulders and the arc-shaped sections of the brush type steam sealing ring are linked as a whole. The utility model has the advantages of compact and simple structure, reasonable design, easy installation and low overall cost, reduces the pressure drop of the working substance on the two sides of the brush type steam sealing pieces in one row on the shaft brush type steam seal, enhances the sealing effect, and greatly improves the stiffness and strength of the brush type steam sealing pieces.
Description
Technical field
The utility model relates to the high leak tightness axle brush packing of the anti-high pressure of a kind of steam turbine.
Background technique
Earlier 1990s, the brush packing came out, and inventor Mao Sheng Kai has obtained China's first patent about the brush packing " the brush formula packing of steam turbine, gas turbine ", the patent No.: ZL94212453.7 in 1994.The brush packing begins to promote in China.Inventor Mao Run continuous heavy rain proposition in 1996 " regulating the brush formula packing in gap automatically " patents the patent No.: ZL96225499.1." the packing brush arrangement of brush formula " of Mao Sheng Kai proposition in 2003 patents the patent No. again: ZL03211917.8.At present, the brush packing has particularly obtained using widely in the U.S. abroad.External brush packing and domestic comparing have points of resemblance, and all fix as an end of brush filament; But brush structure also has difference, and an end of the brush formula labyrinth strip of the U.S. is that welding is fixing, and an end of the brush formula labyrinth strip that Mao Sheng Kai proposes is a mechanical fixation.The brush formula labyrinth strip of welding is to be welded after by two clamping plates filament being picked up, and during for fear of welding clamping plate is burnt, and two clamping plates can not be too thin.Therefore, the brush formula labyrinth strip of welding is compelled to do very thickly, can only be positioned in steam seal ring near on the segmental arc body of neck, thereby makes the brush formula labyrinth strip that a circle welding can only be installed on the circle steam seal ring.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of the brush formula labyrinth strip of above-mentioned welding, and a kind of compact structure, simple, reasonable in design is provided, and is applied to the high leak tightness axle brush packing of the anti-high pressure of steam turbine.
In order to achieve the above object, the technical solution adopted in the utility model is: corresponding with turbine shaft, and along the circumferential direction have groove on the inner cylindrical surface of the steam turbine stator that is abutted against mutually with turbine shaft, brush formula steam seal ring is installed in the groove, brush formula steam seal ring is made up of plurality of sections brush formula steam seal ring segmental arc, brush formula steam seal ring segmental arc comprises the tenon at top, the brush formula steam seal ring segmental arc neck at middle part and the brush formula steam seal ring segmental arc body of bottom, described brush formula steam seal ring be enclosed in turbine shaft around, on the inner cylindrical surface of the brush formula steam seal ring of being formed by plurality of sections brush formula steam seal ring segmental arc, along the circumferential direction have a circle or a multi-turn segmental arc body groove, all be inlaid with a circle brush formula labyrinth strip in every circle segmental arc body groove, described brush formula labyrinth strip is by the high pressure side clamping plate, the low voltage side clamping plate, and many packing brush filaments that are clipped between high pressure side clamping plate and the low voltage side clamping plate are formed, one circle brush formula labyrinth strip is made up of plurality of sections brush formula labyrinth strip, wherein each section brush formula labyrinth strip is embedded in respectively in the segmental arc body groove of one section corresponding brush formula steam seal ring segmental arc, on the inner cylindrical surface of the brush formula steam seal ring segmental arc body of each brush formula steam seal ring segmental arc, the low voltage side clamping plate of being close to every row brush formula labyrinth strip are equipped with a row crossette, and crossette is integral with corresponding brush formula steam seal ring segmental arc sports association.
The utility model has the advantages that:
1, compact structure, simple, installation reasonable in design, easy, overall cost is lower;
2, adopt this device can reduce the pressure drop of single-row brush formula labyrinth strip both sides working medium on the brush packing, strengthen a sealing effect of brush packing;
3, adopt this device after, the rigidity and the intensity of brush formula labyrinth strip are greatly improved, and make this device become the axle brush packing of anti-high pressure.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
By Fig. 1-Fig. 2 as can be known, the utility model is corresponding with turbine shaft 3, and along the circumferential direction have groove 7 on the inner cylindrical surface of the steam turbine stator 1 that is abutted against mutually with turbine shaft 3, brush formula steam seal ring 4 is installed in the groove 7, brush formula steam seal ring 4 be enclosed in turbine shaft 3 around, and form by plurality of sections brush formula steam seal ring segmental arc 2, brush formula steam seal ring segmental arc 2 comprises the tenon 8 at top, the brush formula steam seal ring segmental arc neck 9 at middle part and the brush formula steam seal ring segmental arc body 10 of bottom, the right shoulder 12 of tenon left side shoulder 11 and tenon rides in the groove 7 of steam turbine stator 1, brush formula steam seal ring segmental arc neck right flank 13 leans against on the groove side 14, on the brush formula steam seal ring segmental arc body 10 multi-column labyrinth formula gland sealing gear is arranged, comprising long tooth 15, short tooth 16, the working medium of steam seal ring zone of high pressure 5 flows to steam seal ring low pressure area 6 by the gap between packing crown and the axle, on the inner cylindrical surface of the brush formula steam seal ring of being formed by plurality of sections brush formula steam seal ring segmental arc 24, along the circumferential direction have a circle or a multi-turn segmental arc body groove 28, all be inlaid with a circle brush formula labyrinth strip 17 in every circle segmental arc body groove 28, described brush formula labyrinth strip 17 is by high pressure side clamping plate 27, low voltage side clamping plate 26, and the many packing brush filaments 25 that are clipped between high pressure side clamping plate 27 and the low voltage side clamping plate 26 are formed, one circle brush formula labyrinth strip 17 is made up of plurality of sections brush formula labyrinth strip 17, wherein each section brush formula labyrinth strip 17 is embedded in respectively in the segmental arc body groove 28 of one section corresponding brush formula steam seal ring segmental arc 2, becomes the row brush formula labyrinth strip 17 on this brush formula steam seal ring segmental arc 2.
A groove 18 and axial flange 19 are arranged on the turbine shaft 3 in Fig. 1, axle groove 18 is by axle groove left surface 20, axle groove right flank 21 and axle bottom portion of groove 22 are formed, axial flange top 23 is complementary with short tooth 16, axle groove 18 is complementary with long tooth 15 or brush formula labyrinth strip 17, long tooth 15 and brush formula labyrinth strip 17, under any operating mode all can not with the bi-side 20 of axle groove 18,21 mills of colliding, to guarantee the steam turbine safe operation, this just requires brush formula labyrinth strip 17 enough thin, on the other hand, brush formula labyrinth strip 17 has born the pressure reduction of upstream and downstream both sides working medium, therefore need enough thickness again, these two requirements are conflicting, the structure that the utility model proposes has solved this contradiction, that is: use the brush formula labyrinth strip 17 that enough approaches, guarantee that in steam turbine operation process brush formula labyrinth strip 17 can not run into the axle groove left surface 20 and the axle groove right flank 21 of a groove 18, the strength and stiffness of brush formula labyrinth strip 17 have simultaneously been taken measures to strengthen again, this strengthens the measure of the strength and stiffness of brush formula labyrinth strip 17, be exactly on the inner cylindrical surface of the brush formula steam seal ring segmental arc body 10 of each brush formula steam seal ring segmental arc 2, the low voltage side clamping plate 26 of being close to every row brush formula labyrinth strip 17 are provided with a row crossette 24, crossette 24 joins together with corresponding brush formula steam seal ring segmental arc body 10, brush formula labyrinth strip 17 is when work like this, the major part of the power pressure that is born has just been born by crossette 24, crossette 24 is that the size according to brush formula labyrinth strip 17 pressure that bear designs, this brush formula steam seal ring segmental arc 2 has row or a multiple row crossette 24, be close to the 17 two kinds of structural members of brush formula labyrinth strip on each row crossette 24 respectively, by this have one row or multiple row crossette 24, being close to the brush formula steam seal ring 4 that the brush formula steam seal ring segmental arc 2 of the brush formula labyrinth strip 17 on each row crossette 24 is formed respectively, is exactly the high leak tightness axle brush packing of the anti-high pressure of steam turbine.
Claims (1)
1. the high leak tightness axle brush packing of the anti-high pressure of steam turbine, comprise steam turbine stator and turbine shaft, it is characterized in that: corresponding with turbine shaft (3), and along the circumferential direction have groove (7) on the inner cylindrical surface of the steam turbine stator (1) that is abutted against mutually with turbine shaft (3), brush formula steam seal ring (4) is installed in the groove (7), brush formula steam seal ring (4) is made up of plurality of sections brush formula steam seal ring segmental arc (2), brush formula steam seal ring segmental arc (2) comprises the tenon (8) at top, the brush formula steam seal ring segmental arc neck (9) at middle part and the brush formula steam seal ring segmental arc body (10) of bottom, described brush formula steam seal ring (4) be enclosed in turbine shaft (3) around, on the inner cylindrical surface of the brush formula steam seal ring of being formed by plurality of sections brush formula steam seal ring segmental arc (2) (4), along the circumferential direction have a circle or a multi-turn segmental arc body groove (28), all be inlaid with a circle brush formula labyrinth strip (17) in every circle segmental arc body groove (28), described brush formula labyrinth strip (17) is by high pressure side clamping plate (27), low voltage side clamping plate (26), and the many packing brush filaments (25) that are clipped between high pressure side clamping plate (27) and the low voltage side clamping plate (26) are formed, one circle brush formula labyrinth strip (17) is made up of plurality of sections brush formula labyrinth strip (17), wherein each section brush formula labyrinth strip (17) is embedded in respectively in the segmental arc body groove (28) of corresponding one section brush formula steam seal ring segmental arc (2), on the inner cylindrical surface of the brush formula steam seal ring segmental arc body (10) of each brush formula steam seal ring segmental arc (2), the low voltage side clamping plate (26) of being close to every row brush formula labyrinth strip (17) are equipped with a row crossette (24), and crossette (24) joins together with corresponding brush formula steam seal ring segmental arc body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200998116U CN201460995U (en) | 2009-05-08 | 2009-05-08 | High-pressure resistant and high-sealability shaft brush type steam seal of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200998116U CN201460995U (en) | 2009-05-08 | 2009-05-08 | High-pressure resistant and high-sealability shaft brush type steam seal of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201460995U true CN201460995U (en) | 2010-05-12 |
Family
ID=42388349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200998116U Expired - Fee Related CN201460995U (en) | 2009-05-08 | 2009-05-08 | High-pressure resistant and high-sealability shaft brush type steam seal of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201460995U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603696A (en) * | 2013-09-09 | 2014-02-26 | 张建华 | Novel Brandon brush steam seal |
| CN104153826A (en) * | 2014-07-28 | 2014-11-19 | 江苏透平密封高科技有限公司 | Flow-shielding brush-type steam seal |
| CN107023327A (en) * | 2016-02-01 | 2017-08-08 | 广州市智伟电力科技开发有限公司 | A kind of flow-guiding type multilevel decompression seal system of steam turbine |
| KR101812402B1 (en) * | 2016-01-08 | 2017-12-27 | 두산중공업 주식회사 | Hybrid sealing structure of a turbine |
-
2009
- 2009-05-08 CN CN2009200998116U patent/CN201460995U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603696A (en) * | 2013-09-09 | 2014-02-26 | 张建华 | Novel Brandon brush steam seal |
| CN104153826A (en) * | 2014-07-28 | 2014-11-19 | 江苏透平密封高科技有限公司 | Flow-shielding brush-type steam seal |
| KR101812402B1 (en) * | 2016-01-08 | 2017-12-27 | 두산중공업 주식회사 | Hybrid sealing structure of a turbine |
| CN107023327A (en) * | 2016-02-01 | 2017-08-08 | 广州市智伟电力科技开发有限公司 | A kind of flow-guiding type multilevel decompression seal system of steam turbine |
| CN107023327B (en) * | 2016-02-01 | 2019-02-22 | 广州市智伟电力科技开发有限公司 | A kind of flow-guiding type multilevel decompression sealing gland of steam turbine |
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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: 20100512 Termination date: 20160508 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |