CN202611774U - 135MW steam turbine nozzle - Google Patents
135MW steam turbine nozzle Download PDFInfo
- Publication number
- CN202611774U CN202611774U CN 201220305817 CN201220305817U CN202611774U CN 202611774 U CN202611774 U CN 202611774U CN 201220305817 CN201220305817 CN 201220305817 CN 201220305817 U CN201220305817 U CN 201220305817U CN 202611774 U CN202611774 U CN 202611774U
- Authority
- CN
- China
- Prior art keywords
- nozzle
- steam turbine
- gland sealing
- steam
- improved
- 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
Disclosed is a 135MW steam turbine nozzle. The 135MW steam turbine nozzle is used for a transformation project of a 135MW steam turbine generator unit to save energy, reduce consumption and improve the output capability of the unit. The 135MW steam turbine nozzle is characterized in that two lines of steam seal teeth are arranged on a blade root steam seal installed on the nozzle, each line of steam seal teeth is in an inlaid structure, an electrical discharge machining (EDM) processing method is utilized for processing a nozzle flow channel, the process technology of the nozzle is modified, the safety and reliability of the nozzle are improved, a nozzle group body is connected with a nozzle chamber through a taper thread inside hexagonal bolt, then a sealing ring is utilized for locating the nozzle group body and a high pressure inner cylinder, a nozzle blade profile and a meridian plane profile are optimized, and the outlet area of the nozzle is optimized. The 135MW steam turbine nozzle has the advantages that the regulating stage efficiency is improved, the coal consumption is reduced, and the unit output is improved.
Description
Technical field
the utility model directly applies to saving energy and reduce the cost, increasing on the transformation project of unit output of 135MW steam turbine set.
Background technique
The governing stage design efficiency of
steam turbine is about 70%, and the actual operating efficiency of most of units is about 40%, and efficient is obviously on the low side.Its reason is that nozzle vane molded lines and meridian surface shape aeroperformance are relatively poor, and machining accuracy is low, and blade efficiency is low; Exit area of nozzle is excessive, during unit operation restriction loss excessive, decrease in efficiency; There is leakage losses in the nozzle split.
Summary of the invention
the utility model provides the modification scheme of 135MW nozzle of steam turbine, to improve governing stage efficient, reduces coal consumption, increases unit output.
the utility model solves the technological scheme that its technical problem adopted: a kind of 135MW nozzle of steam turbine; Be installed on the governing stage movable vane blade root packing totally 2 road gland sealing gears on the nozzle sets body, said 2 road gland sealing gears together for long tooth, another road for lacking tooth.The per pass gland sealing gear is an embedded structure, and this embedded structure is installed in the packing groove and is constituted by gland sealing gear, lock sheet, washer three parts, towards riveting washer top, makes this sleeve assembly tight, the lock sheet crimp, pushes down washer then.This structure has from locked function, can bear big pressure reduction.
particularly; New nozzle is optimized nozzle vane molded lines, meridian surface shape and exit area of nozzle; Adopt EDM (spark erosion) manufacturing process; Improve processing technology simultaneously, guaranteed the machining accuracy and the quality of nozzle vane, improved the safety reliability of nozzle; Suitably adjustment packing radial clearance is to improve turbine efficiency.
The beneficial effect of
the utility model is steam turbine set to be reached improve governing stage efficient, reduction coal consumption, the purpose of increase unit output.
Description of drawings
further specify the utility model below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the correlation schematic representation of the utility model in practical application and between high-pressure inner cylinder and the nozzle box.
1. nozzle sets bodies among
figure, 2. seal ring, 3. tapered thread hexagon socket head cap screw I, 4. lock sheet, 5. gland sealing gear, 6. washer, 7. tapered thread hexagon socket head cap screw II, 8. meridian surface shape, 9. nozzle box, 10. high-pressure inner cylinder, 11. high pressure rotors.
Embodiment
EDM processing method working nozzle runner according to the drawing design, is adopted in
behind the buying blank, the machining accuracy of control nozzle vane molded lines and meridian surface shape (8) utilizes machined into nozzle sets body (1) to the drawing design size.
in the embodiment shown in fig. 1; Nozzle sets body (1) is connected with nozzle box (9) with tapered thread hexagon socket head cap screw II (7) through tapered thread hexagon socket head cap screw I (3); Utilize seal ring (2) with nozzle sets body (1) and high-pressure inner cylinder (10) location then; The processing vapor sealing groove at nozzle sets body (1) blade root place is inlayed gland sealing gear (5).The installation of gland sealing gear (5): after being installed in gland sealing gear (5), lock sheet (4) and washer (6) in the packing groove; Towards riveting washer (6) top; Make this sleeve assembly tight,, push down washer (6) with fixing this sleeve assembly then lock sheet (4) crimp.Gland sealing gear (5) forms sealing configuration with high pressure rotor (11).
when assembling with gland sealing gear (5) radial clearance A repair to design load.
Claims (3)
1. 135MW nozzle of steam turbine is characterized in that: be installed on the blade root packing totally 2 road gland sealing gears on the nozzle, the nozzle sets body links to each other with the nozzle box through the tapered thread hexagon socket head cap screw, utilizes seal ring that nozzle sets body and high-pressure inner cylinder are located then.
2. nozzle according to claim 1 is characterized in that: said 2 road gland sealing gears are short tooth for long tooth, another road together.
3. nozzle according to claim 1 is characterized in that: the gland sealing gear structure that adopts is inserted, and this embedded structure is installed in the packing groove and is constituted by gland sealing gear, lock sheet, washer three parts; Towards riveting washer top; Make this sleeve assembly tight, the lock sheet crimp, push down washer then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220305817 CN202611774U (en) | 2012-06-28 | 2012-06-28 | 135MW steam turbine nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220305817 CN202611774U (en) | 2012-06-28 | 2012-06-28 | 135MW steam turbine nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202611774U true CN202611774U (en) | 2012-12-19 |
Family
ID=47345483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220305817 Expired - Lifetime CN202611774U (en) | 2012-06-28 | 2012-06-28 | 135MW steam turbine nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202611774U (en) |
-
2012
- 2012-06-28 CN CN 201220305817 patent/CN202611774U/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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100044, Beijing Haidian District Zhongguancun South Street, No. 56, building 18 square radius Patentee after: Beijing Guoneng Longwei Power Generation Technology Co.,Ltd. Address before: 100044, Beijing Haidian District Zhongguancun South Street, No. 56, building 18 square radius Patentee before: BEIJING LONGWEI POWER GENERATION TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |
|
| CX01 | Expiry of patent term |