CN2656641Y - High efficient gland sealing device for steam turbine - Google Patents
High efficient gland sealing device for steam turbine Download PDFInfo
- Publication number
- CN2656641Y CN2656641Y CN 02273946 CN02273946U CN2656641Y CN 2656641 Y CN2656641 Y CN 2656641Y CN 02273946 CN02273946 CN 02273946 CN 02273946 U CN02273946 U CN 02273946U CN 2656641 Y CN2656641 Y CN 2656641Y
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- CN
- China
- Prior art keywords
- sealing
- honeycomb
- tooth
- turbine
- seal
- 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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Abstract
An efficient turbine seal device is a rotor tip dynamic sealing device for turbines. Once the rotor speed of the existing turbine exceeds the critical speed, the wide tooth can be damaged seriously and be inverted easily, and the sealing gap can increase several times even dozens of times, which lead to the serious leakage, reduced efficiency, and influence on the whole turbine function. The utility model comprises: a sealing body (2), of which the sealing surface is a honeycomb ring (5), is positioned on the stator (1); the other side of the sealing surface, which is corresponding to the honeycomb surface, is positioned a wide tooth cover band (3) which is on a moving blade (4); when installing and working, the tooth of the wide tooth cover band (3) are inserted into the honeycomb ring (5). The utility model is applied to the sealing of the large turbines axles which demand long service life, low abrasion, low leakage, and the protection of the moving blade from damaging.
Description
Technical field:
The utility model relates to a kind of dynamic seal apparatus of movable vane top of steam turbine.
Background technique:
The shroud at steam turbine movable vane top generally adopts the riveted joint mode, the one made is also arranged, the moving vane 4 tops steam turbine cylinder corresponding with above-mentioned shroud is that mercapto tooth seal ring 3 is housed on the stator 1, because the gap of dredging tooth is generally about 5mm, leakage rate is big, this design of Sealing Structure is to bump the injury movable vane for the moving vane 4 that prevents steam turbine with thin tooth sealing 3.Yet the rotating speed of rotor is dredged tooth 3 serious wearing and tearing can be taken place in case surpass critical speed of rotation, also lodging easily, and seal clearance can increase several times even tens of times from design load, causes to leak seriously, and decrease in efficiency influences the function of whole steam turbine.
Summary of the invention:
The utility model will be separated inferior technical problem: a kind of efficient turbine steam seal device is provided, can effectively protects moving vane, improve working life.
The technological scheme that addresses the above problem:
Efficient turbine steam seal device, its composition comprises: seal, the sealing surface of described seal are the honeycomb ring, the opposite side of described sealing correspondence is for dredging the tooth shroud.
Above-mentioned efficient turbine steam seal device, the tooth of described thin tooth shroud is inserted in the described honeycomb ring.
Above-mentioned efficient turbine steam seal device, described thin tooth shroud is installed in moving vane one side.
Beneficial effect compared with prior art:
1. this product is made by honeycomb seal, is complementary with thin tooth, and under special operation conditions such as rotor critical speed, owing to can produce wearing and tearing at a high speed, what at first be worn is honeycomb seal, thereby has avoided the damage to the rotor generation.Therefore, have very little that the gap of honeycomb seal generally can do, particularly have on the top shroud of movable vane when dredging tooth, can reach the zero clearance during installation.
2. use this product in the running, the thin tooth on the top shroud of moving vane is inserted in the honeycomb ring, and the ability of obturaging strengthens greatly.
3. through check, the sealing intensity of this product is good, even moment and rotor rub under threshold state, can all not be to dredge the structure of tooth by heavy wear as both sides also, the rate of wear obviously lowers, and more can not lodge, the seal clearance that maintenance that can be long-term is less, significantly reduced leakage, made steam turbine keep higher efficient, increased the service life.
4. adopt honeycomb seal structure that bigger damping is provided, can suppress the vibration of rotor, in the rotor proper functioning,, also can not produce the exciting of sealing air-flow, can guarantee steam turbine stable operation at full capacity even seal clearance is very little.
5. under identical seal clearance, the leakage of the honeycomb seal structure that this product adopts reduces more than 30% than conventional construction.
Description of drawings:
Accompanying drawing 1 is the structural representation of this product.Accompanying drawing 2 is A-A profiles of accompanying drawing 1.
Accompanying drawing 3 is structural representation views of traditional product.
Below in conjunction with the concrete mode of execution of description of drawings:
Embodiment 1.
Efficient turbine steam seal device, its composition comprises: be installed in the seal 2 on the stator 1, the sealing surface of described seal 2 is a honeycomb ring 5, the opposite side that described sealing surface is corresponding with the honeycomb face is the thin tooth shroud 3 that is installed on the moving vane 4.
Embodiment 2:
Above-mentioned efficient turbine steam seal device, when using installation and work, the tooth of described thin tooth shroud 3 is inserted in the described honeycomb ring 5.
Embodiment 3:
Above-mentioned efficient turbine steam seal device, described thin tooth shroud 5 is installed in moving vane 4 one sides.
Embodiment 4:
Above-mentioned efficient turbine steam seal device, effect was relatively good when the thickness of the wall of described honeycomb ring 5 was 0.05-0.1mm.
Claims (3)
1. efficient turbine steam seal device, its composition comprises: seal is characterized in that: the sealing surface of described seal is the honeycomb ring, the opposite side of described sealing correspondence is for dredging the tooth shroud.
2. efficient turbine steam seal device according to claim 1 is characterized in that: the tooth of described thin tooth shroud is inserted in the described honeycomb ring.
3. efficient turbine steam seal device according to claim 1 and 2 is characterized in that: described thin tooth shroud is installed in moving vane one side, and/or the thickness of the wall of described honeycomb ring is 0.05-0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02273946 CN2656641Y (en) | 2002-06-28 | 2002-06-28 | High efficient gland sealing device for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02273946 CN2656641Y (en) | 2002-06-28 | 2002-06-28 | High efficient gland sealing device for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2656641Y true CN2656641Y (en) | 2004-11-17 |
Family
ID=34319031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02273946 Expired - Fee Related CN2656641Y (en) | 2002-06-28 | 2002-06-28 | High efficient gland sealing device for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2656641Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213112A (en) * | 2010-04-09 | 2011-10-12 | 通用电气公司 | Axially-oriented cellular seal structure for turbine shrouds and related method |
| CN103541777A (en) * | 2013-11-05 | 2014-01-29 | 南京航空航天大学 | Bladed leak-free seal structure for turbo-machinery |
| CN105090511A (en) * | 2015-08-21 | 2015-11-25 | 成都宁江弘福科技有限公司 | Metal automatic grinding seal device |
| CN110307042A (en) * | 2019-07-25 | 2019-10-08 | 东方电气集团东方汽轮机有限公司 | A kind of gland seal structure between the motor-driven static component of rotating type impeller |
| CN113969806A (en) * | 2021-10-29 | 2022-01-25 | 重庆江增船舶重工有限公司 | High-power multistage axial flow turbine expander |
-
2002
- 2002-06-28 CN CN 02273946 patent/CN2656641Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213112A (en) * | 2010-04-09 | 2011-10-12 | 通用电气公司 | Axially-oriented cellular seal structure for turbine shrouds and related method |
| CN103541777A (en) * | 2013-11-05 | 2014-01-29 | 南京航空航天大学 | Bladed leak-free seal structure for turbo-machinery |
| CN103541777B (en) * | 2013-11-05 | 2015-05-06 | 南京航空航天大学 | Bladed leak-free seal structure for turbo-machinery |
| CN105090511A (en) * | 2015-08-21 | 2015-11-25 | 成都宁江弘福科技有限公司 | Metal automatic grinding seal device |
| CN110307042A (en) * | 2019-07-25 | 2019-10-08 | 东方电气集团东方汽轮机有限公司 | A kind of gland seal structure between the motor-driven static component of rotating type impeller |
| CN113969806A (en) * | 2021-10-29 | 2022-01-25 | 重庆江增船舶重工有限公司 | High-power multistage axial flow turbine expander |
| CN113969806B (en) * | 2021-10-29 | 2024-02-02 | 重庆江增船舶重工有限公司 | High-power multistage axial-flow turboexpander |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |