CN2672289Y - Spring gear gas seal - Google Patents
Spring gear gas seal Download PDFInfo
- Publication number
- CN2672289Y CN2672289Y CN 200420030121 CN200420030121U CN2672289Y CN 2672289 Y CN2672289 Y CN 2672289Y CN 200420030121 CN200420030121 CN 200420030121 CN 200420030121 U CN200420030121 U CN 200420030121U CN 2672289 Y CN2672289 Y CN 2672289Y
- Authority
- CN
- China
- Prior art keywords
- steam seal
- flakey
- scale
- ring
- annular
- 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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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to a circular elastic gear steam seal which is encircled by 2 to 12 arc-shaped sections. Inner circumference is evenly distributed with 2 to 6 circular steam seal gears. Each steam seal gear is composed of elastic scale-shaped steam seal rings and steel supporting rings which are stuck with the steam seal rings. The scale-shaped steam seal rings are made of bent elastic thin metal sheets, and the inner side edge of the scale-shaped steam seal ring is distributed evenly with joint cuttings along a circumferential direction. The distance between two adjacent joint cuttings is 3 to 80MM. Each circular elastic steam seal gear is provided with 1 to 3 layers of scale-shaped steam seal rings, and the thickness of the supporting rings is 0.8 to 1.5MM. The outer side edge of the scale-shaped steam seal rings exceeds the outer side edge of the supporting rings by 1 to 5MM. The utility model is provided with the scale-shaped steam seal rings which are made of the elastic thin metal sheets, and the circumference of the scale-shaped steam seal ring is provided with the joint cuttings. The scale-shaped steam seal rings have the advantages of good elasticity and collapsibility and small sealing gap. When the steam seal is arranged, the leakage rate of steam is reduced sharply, which is favorable for improving the efficiency of a steam turbine.
Description
Technical field
The utility model relates to the broach of the serrate-type steam seal that uses on a kind of steam turbine, particularly a kind of serrate-type steam seal.
Background technique
Every place that needs to reduce steam leakage gas all is provided with packing between stator and rotor in steam turbine.Packing has serrate-type steam seal.Serrate-type steam seal is an annular, the serrate-type steam seal of annular is to be surrounded by a plurality of segmental arcs, the inner circumference of the serrate-type steam seal of annular is evenly equipped with a plurality of annular gland sealing gears, during use, annular gland sealing gear and turbine rotor shroud excircle or turbine shaft excircle are formed sealing pair, the annular gland sealing gear crown with turbine rotor shroud excircle or turbine shaft excircle 0.15～0.8 millimeter labyrinth clearance is arranged, the steam discharge resistance is caused to leaking out steam in this labyrinth clearance, in order to seal between realization stator and rotor, under the certain prerequisite of gland sealing gear front and back steam parameter, the gap is more little, and air leakage is few more, and Efficiency of Steam Turbine is just high more.In the prior art, the annular broach of serrate-type steam seal is a rigidity, and section is thicker and be straight, and gland sealing gear is perpendicular to the turbine rotor center.Frictional force and frictional heat when bumping in order to reduce between the sound that mill takes place when packing is installed, must leave 0.15～0.8 millimeter labyrinth clearance according to the size of steam turbine.This serrate-type steam seal in use, the labyrinth clearance is bigger, air leakage is bigger, and is bigger to turbine efficiency influence.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiency of above-mentioned broach packing, to propose a kind of very little elastic toothed belt vapour seal in gap of sealing pair.
The utility model is realized with the following method.
Elastic toothed belt vapour seal is annular, the elastic toothed belt vapour seal of annular is surrounded by 2～12 segmental arc end-to-ends, the elastic toothed belt vapour seal inner circumference of annular is evenly equipped with 2～6 cyclic spring gland sealing gears, each cyclic spring gland sealing gear is made up of flexible flakey labyrinth ring and the filler ring that sticks together with it, the flakey labyrinth ring is to make with resilient blade, the thickness of resilient blade is 0.25～0.4 millimeter, the section of flakey labyrinth ring is crooked, angle between curved section and the rotor radius is 10～30 °, the circumferencial direction of flakey labyrinth ring inside edge is evenly equipped with joint-cutting, the radially folded angle of joint-cutting and flakey labyrinth ring is 0～45 °, joint-cutting length is 1～2 times of distance between adjacent joint-cutting, 1～3 layer of flakey labyrinth ring arranged in each cyclic spring gland sealing gear, the thickness of filler ring is 0.8～1.5 millimeter, it also is crooked that the section of filler ring matches with the section of the flakey labyrinth ring that sticks together, and the inside edge of flakey labyrinth ring exceeds 0.5～2 millimeter of filler ring inside edge.Joint-cutting is divided into a plurality of elasticity scales to the outer edge of flakey labyrinth ring.
During use, elastic toothed belt vapour seal is installed on the stator and the stator between the rotor of steam turbine, the bending of the contrary leakage of its cyclic spring gland sealing gear vapour direction, circle is 0.5～1.0 millimeter with the gap of respective rotor cylindrical in the filler ring, and the seal clearance between the inner circumference of flakey labyrinth ring and rotor excircle is transferred to 0.05～0.2 millimeter.
The circumference that the useful flexible sheet metal of gland sealing gear of the present utility model is made has the flakey labyrinth ring that cracks, and the flakey labyrinth ring has elasticity, and deformability is good, it is very little that seal clearance can be transferred, after packing is installed, can significantly reduce the leakage rate of steam, help improving Efficiency of Steam Turbine.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 is that the master of elastic toothed belt vapour seal looks schematic representation;
Fig. 2 is the A-A generalized section of Fig. 1;
Fig. 3 is that elastic toothed belt vapour seal is installed in the generalized section on the dividing plate outer shroud convex edge.
Embodiment
Fig. 1, Fig. 2, among Fig. 3, elastic toothed belt vapour seal 1 is annular, the elastic toothed belt vapour seal of annular is surrounded by six segmental arc 2 end-to-ends, the elastic toothed belt vapour seal inner circumference of annular is evenly equipped with four cyclic spring gland sealing gears 3, each cyclic spring gland sealing gear is made up of flexible flakey labyrinth ring 4 and the filler ring 5 that sticks together with it, the flakey labyrinth ring is to make with resilient blade, the thickness of resilient blade is 0.25～0.4 millimeter, the section of flakey labyrinth ring is crooked, angle is 10～30 ° between curved section and rotor radius, the circumferencial direction of the inside edge of flakey labyrinth ring is evenly equipped with joint-cutting, the radially folded angle of joint-cutting and flakey labyrinth ring is 0～45 °, joint-cutting length is 1～2 times of distance between adjacent joint-cutting, 2 layers of flakey labyrinth ring are arranged in each cyclic spring gland sealing gear, the thickness of filler ring is 0.8～1.5 millimeter, it also is crooked that the section of filler ring matches with the section of the flakey labyrinth ring that sticks together, and the outer edge of flakey labyrinth ring exceeds 0.5～2 millimeter of filler ring outer edge.Joint-cutting is divided into a plurality of elasticity scales 6 to the outer edge of flakey labyrinth ring.
Claims (2)
1. elastic toothed belt vapour seal, be annular, the elastic toothed belt vapour seal of annular is surrounded by 2～12 segmental arc end-to-ends, the elastic toothed belt vapour seal inner circumference of annular is evenly equipped with 2～6 annular gland sealing gears, it is characterized in that: each annular gland sealing gear is made up of flexible flakey labyrinth ring and the filler ring that sticks together with it, the flakey labyrinth ring is to make with resilient blade, the thickness of resilient blade is 0.25～0.4 millimeter, the section of flakey labyrinth ring is crooked, angle between curved section and the rotor radius is 10～30 °, the circumferencial direction of the inside edge of flakey labyrinth ring is evenly equipped with joint-cutting, the radially folded angle of joint-cutting and flakey labyrinth ring is 0～45 °, joint-cutting length is 1～2 times of distance between adjacent joint-cutting, 1～3 layer of flakey labyrinth ring arranged in each cyclic spring gland sealing gear, the thickness of filler ring is 0.8～1.5 millimeter, it also is crooked that the section of filler ring matches with the section of the flakey labyrinth ring that sticks together, and the inside edge of flakey labyrinth ring exceeds 0.5～2 millimeter of filler ring inside edge.
2. by the described elastic toothed belt vapour seal of claim 1, it is characterized in that: described cyclic spring tooth packing is surrounded by six segmental arc end-to-ends, the elastic toothed belt vapour seal inner circumference of annular is evenly equipped with four annular gland sealing gears, and 2 layers of flakey labyrinth ring are arranged in each cyclic spring gland sealing gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420030121 CN2672289Y (en) | 2004-01-15 | 2004-01-15 | Spring gear gas seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420030121 CN2672289Y (en) | 2004-01-15 | 2004-01-15 | Spring gear gas seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2672289Y true CN2672289Y (en) | 2005-01-19 |
Family
ID=34483631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420030121 Expired - Fee Related CN2672289Y (en) | 2004-01-15 | 2004-01-15 | Spring gear gas seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2672289Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285790A (en) * | 2015-06-05 | 2017-01-04 | 上海汽轮机厂有限公司 | Gland seal structure |
| WO2017092158A1 (en) * | 2015-12-01 | 2017-06-08 | 秦皇岛鱼麟电力设备有限公司 | Elastic sheet used in servo suspended steam seal band of turbine and steam seal structure thereof |
| CN109690025A (en) * | 2016-08-31 | 2019-04-26 | 西门子股份公司 | The device and stator-rotator sealing device of the seal section of turbine, the externally flow path of restriction turbine |
-
2004
- 2004-01-15 CN CN 200420030121 patent/CN2672289Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285790A (en) * | 2015-06-05 | 2017-01-04 | 上海汽轮机厂有限公司 | Gland seal structure |
| CN106285790B (en) * | 2015-06-05 | 2019-10-25 | 上海汽轮机厂有限公司 | Gland seal structure |
| WO2017092158A1 (en) * | 2015-12-01 | 2017-06-08 | 秦皇岛鱼麟电力设备有限公司 | Elastic sheet used in servo suspended steam seal band of turbine and steam seal structure thereof |
| US10385711B2 (en) | 2015-12-01 | 2019-08-20 | Qinhuangdao Yulin Electric Power Equipment Co., Ltd. | Elastic sheet used for turbine follow-up suspended steam seal belt and steam seal structure thereof |
| CN109690025A (en) * | 2016-08-31 | 2019-04-26 | 西门子股份公司 | The device and stator-rotator sealing device of the seal section of turbine, the externally flow path of restriction turbine |
| US11319826B2 (en) | 2016-08-31 | 2022-05-03 | Siemens Energy Global GmbH & Co. KG | Seal segment for a turbine, assembly for externally delimiting a flow path of a turbine, and stator/rotor seal |
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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 |