CN200989220Y - A 300MW Turbine nozzle - Google Patents
A 300MW Turbine nozzle Download PDFInfo
- Publication number
- CN200989220Y CN200989220Y CN 200720000018 CN200720000018U CN200989220Y CN 200989220 Y CN200989220 Y CN 200989220Y CN 200720000018 CN200720000018 CN 200720000018 CN 200720000018 U CN200720000018 U CN 200720000018U CN 200989220 Y CN200989220 Y CN 200989220Y
- Authority
- CN
- China
- Prior art keywords
- gland sealing
- nozzle
- governing stage
- sealing gear
- utility
- 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 - Lifetime
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Abstract
The utility model relates to a novel nozzle, used in the transformation project of the 300 MW turbogenerator which saves energy and increases the output capacity of the unit. The utility model is characterized in that the steam seal of the rotor blade top in the governing stage which is arranged on the nozzle has four pieces of gland sealing gears; every piece of the gland sealing gears is of inlayed structure. The utility model is mainly used to reduce the leakage loss in the governing stage, and to increase the output capacity of the unit.
Description
Affiliated technical field
The utility model directly applies to saving energy and reduce the cost, increasing on the transformation project of unit output of 300MW steam turbine set.
Background technique
The governing stage design efficiency of 300MW steam turbine is about 71%, and the actual operating efficiency of most of units is about 50%, simultaneously unit exerts oneself not enough.Domestic 300MW machine governing stage movable vane top gland sealing gear is generally 1 road tooth, is positioned at the steam admission side of leaf top girth band.Because governing stage pressure reduction is bigger, a lot of units exist governing stage movable vane blade tip seal leakage losses to reach the easily phenomenon of lodging greatly.
Summary of the invention
In order to improve 300MW Steam Turhine Adjustment stage efficiency, to increase unit output, the modification scheme that the utility model provides the 300MW nozzle of steam turbine to change when improving governing stage efficient, solves the problem of unit output deficiency.
The technological scheme that its technical problem that solves the utility model adopts is: in conjunction with Long Wei company to the obtained successful experience of 300MW steam turbine reformation and to the investigation of present the type unit operation situation, former nozzle sets is changed, the redesign that the new nozzle that adopts carries out vane type line, meridian surface shape to nozzle is optimized, exit area of nozzle is redesigned, adopt EDM (spark erosion) manufacturing process to guarantee nozzle vane machining accuracy and quality, the governing stage blade tip seal tooth that is installed on the nozzle sets is increased to 4 roads by 1 to 2 road, reduce the packing radial clearance simultaneously.
The beneficial effects of the utility model are to make steam turbine set reach the purpose of raising governing stage efficient, increase unit output ability.(in the project of the energy-saving and cost-reducing raising of No. 2 units of Huaibei Utilities Electric Co., Ltd. of Guoan unit name-plate rating, Long Wei company changes nozzle, in unite the thermal test report of doing by Anhui Academy of Electric Power Sciences and Xi'an hot working research institute, show, under the situation of five valve standard-sized sheets, governing stage efficient brings up to improved 72.29% by 44.34% before transforming.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a cross-sectional view of the present utility model.
Fig. 2 is the correlation schematic representation of the utility model when practical application and between governing stage movable vane and the nozzle box.
Fig. 3 is a governing stage movable vane top gland seal structure schematic representation.
1. pin, 2. diaphragm seal, the 3. tight sheet of rope, 4. washer, 5. special screws among the figure, 6. diaphragm seal, the 7. tight sheet of rope, 8. diaphragm seal, 9. diaphragm seal, the 10. tight sheet of rope, 11. pin, 12. tapered thread socket head screws, 13. nozzle sets bodies, 14. tapered thread socket head screws, 15. governing stage movable vanes.
Embodiment
Behind the buying blank, according to the drawing design, utilize EDM working nozzle runner, utilize the machined into nozzle surface to the drawing design size.Cross-sectional view of the present utility model is seen Fig. 1.
In Fig. 2, nozzle sets (13) links to each other with inner casing by tapered thread socket head screw (12) (14).On nozzle sets (13), open the packing groove and inlay packing, governing stage movable vane top gland sealing gear 4 roads wherein, the nozzle sets root is totally three road gland sealing gears.Stationary part and rotating part form sealing configuration.
In the embodiment shown in fig. 3, on nozzle sets (13), open the packing groove and inlay packing, wherein movable vane top packing 4 roads (2), the short tooth packing of middle twice, the long tooth packing of both sides twice, sealing configuration is formed on labyrinth strip and governing stage movable vane top, the assurance labyrinth clearance is fit to, the control leakage losses.Leaf pushes up the layout of 4 road gland sealing gears, requires when assembling gland sealing gear and moving blade ' s shroud band axial clearance `A`, `B` and radial clearance `C`, `D` repair to design load.
Claims (3)
1. new type nozzle, be applied to the 300MW steam turbine set energy-saving and cost-reducing, increase in the transformation project of unit output, it is characterized in that: be installed on the governing stage movable vane blade tip seal totally four road gland sealing gears on the nozzle, the per pass gland sealing gear is an embedded structure.
2. nozzle according to claim 1 is characterized in that: be installed on the governing stage movable vane blade tip seal totally four road gland sealing gears on the nozzle, middle twice gland sealing gear is short tooth, and both sides twice gland sealing gear is long tooth.
3. nozzle according to claim 1 is characterized in that: the gland sealing gear structure that adopts is inserted, and this inserted gland sealing gear is made of labyrinth strip, washer, tight sheet three parts of rope, has from locked function, can bear big pressure reduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720000018 CN200989220Y (en) | 2007-01-04 | 2007-01-04 | A 300MW Turbine nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720000018 CN200989220Y (en) | 2007-01-04 | 2007-01-04 | A 300MW Turbine nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200989220Y true CN200989220Y (en) | 2007-12-12 |
Family
ID=38940257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720000018 Expired - Lifetime CN200989220Y (en) | 2007-01-04 | 2007-01-04 | A 300MW Turbine nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200989220Y (en) |
-
2007
- 2007-01-04 CN CN 200720000018 patent/CN200989220Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING LONG WEI GENERATION TECHNOLOGIES CO., LTD. Free format text: FORMER OWNER: STATE ELECTRIC UNITED POWER TECHNOLOGY CO., LTD. Effective date: 20090605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: STATE ELECTRIC UNITED POWER TECHNOLOGY CO., LTD. Free format text: FORMER NAME: LONGWAYFAR POWER TECHNOLOGY SERVICE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: No. 56, building 16, building No. 102206, Zhongguancun South Main Street, Beijing, Haidian District, China Patentee after: GUODIAN UNITED POWER TECHNOLOGY Co.,Ltd. Address before: Beijing City, Xuanwu District Baiguang road two No. 1 China electric power information communication comprehensive building 11 floor, zip code: 100761 Patentee before: LONGWEI ELECTRIC POWER GENERAT |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20090605 Address after: No. 56, building 18, building No. 102206, Zhongguancun South Main Street, Beijing, Haidian District, China Patentee after: BEIJING LONGWEI POWER GENERATION TECHNOLOGY Co.,Ltd. Address before: No. 56, building 16, building No. 102206, Zhongguancun South Main Street, Beijing, Haidian District, China Patentee before: GUODIAN UNITED POWER TECHNOLOGY Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 56, building 18, building No. 100044, Zhongguancun South Main Street, Beijing, Haidian District, China Patentee after: BEIJING LONGWEI POWER GENERATION TECHNOLOGY Co.,Ltd. Address before: No. 56, building 18, building No. 102206, Zhongguancun South Main Street, Beijing, Haidian District, China Patentee before: BEIJING LONGWEI POWER GENERATION TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20071212 |
|
| EXPY | Termination of patent right or utility model | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Longwei Power Generation Technology Co.,Ltd. Document name: Notification of Expiration of Patent Right Duration |