CN208619177U - A kind of steam turbine gland system - Google Patents
A kind of steam turbine gland system Download PDFInfo
- Publication number
- CN208619177U CN208619177U CN201821025843.7U CN201821025843U CN208619177U CN 208619177 U CN208619177 U CN 208619177U CN 201821025843 U CN201821025843 U CN 201821025843U CN 208619177 U CN208619177 U CN 208619177U
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- Prior art keywords
- high pressure
- pipe
- steam
- return tube
- shaft seal
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Abstract
The utility model discloses a kind of steam turbine gland systems, including high pressure cylinder, the both ends of the high pressure cylinder are respectively connected with high pressure axle envelope back-steam main pipe, the top of the high pressure axle envelope back-steam main pipe is connected with high pressure shaft seal return tube on the outside of high pressure cylinder, and the top of high pressure axle envelope back-steam main pipe is connected with middle last item envelope return tube on the outside of intermediate pressure cylinder, one end of the high pressure shaft seal return tube is connected with gland heater, the top of the gland heater is equipped with condenser close to the side of water injection pipe, the bottom end of the gland heater is equipped with axial sealing blower fan, the bottom end of the high pressure shaft seal return tube and middle last item envelope return tube is equipped with oxygen-eliminating device close to the side of heat pump return tube, shaft seal overflow pipe is connected on the upside of one end of the steam inlet pipe.The utility model is structurally reasonable, and use is safe, and so that high pressure shaft seal and middle last item envelope is emitted vapour causes oil quality of lubricant deterioration problem thoroughly to solve, and guarantees unit operational reliability.
Description
Technical field
The utility model relates to steam turbine technology field, specifically a kind of steam turbine gland system.
Background technique
The major function of steam turbine gland system is to steam turbine, the axle envelope of feed pump small turbine and stop valve, adjusting
The valve rod packing of valve provides sealed steam, while by the gas leakage reasonable direction of each packing or extraction, the high pressure cylinder shaft work of steam turbine
Can prevent steam to outward leakage, to ensure that steam turbine has higher efficiency, the low pressure (LP) cylinder s function of steam turbine is to prevent the external world
Air enter inside steam turbine, guarantee that steam turbine has vacuum as high as possible, wherein 350M is overcritical, a resuperheat,
Single shaft, twin-cylinder double flow, single back pressure, extraction-condensing steam turbine, mainly use full admission distribution way of steam, gland seal system unit
Be the self-sealing method of operation when normal operation, underload by it is cold again, Auxiliary Steam standby steam source, main, small turbine are provided
Leak-off steam drains into shaft sealing cooler, and main inlet throttle-stop valve and pitch bar leakage vapour a part return to shaft sealing cooler, and a part of steam discharge is to again
Cold section of hot device, is discharged to condenser for excess steam by overflow valve when axle envelope main-piping pressure is high.
High currently on the market, intermediate pressure cylinder axle envelope steam exhaust piping is usually downward by 12.6 meters of platforms of steam turbine in design
To 6.3 meters of platforms, gland heater, the unit easy ponding of U-shaped curved pipe, senior middle school's last item when running are entered by U-shaped curved pipe
It is unsmooth to seal back-steam, gland heater can not be back to, cause largely to leak vapour at high pressure axle envelope, high pressure axle envelope abuts bearing shell, because
Lubricating oil system is in micro-vacuum state, and the steam that axle envelope is emerged scurries into lubricating oil system from preceding case, bearing housing, and carries attached
Close dust causes Water in oil amount and granule content to exceed critical field, seriously threatens unit safety operation, transports to unit
Row brings severe compromise.
Therefore, those skilled in the art provide a kind of steam turbine gland system, to solve to propose in above-mentioned background technique
The problem of.
Utility model content
The purpose of this utility model is to provide a kind of steam turbine gland systems, mentioned above in the background art to solve
Problem.
To achieve the above object, the utility model provides the following technical solutions:
A kind of steam turbine gland system, including high pressure cylinder, the both ends of the high pressure cylinder are respectively connected with high pressure axle envelope back-steam
Main pipe is connected with intermediate pressure cylinder on the inside of the high pressure axle envelope back-steam main pipe, and the top of the high pressure axle envelope back-steam main pipe is leaned on
It is connected with high pressure shaft seal return tube on the outside of nearly high pressure cylinder, and the top of high pressure axle envelope back-steam main pipe is close to the outside of intermediate pressure cylinder
It is connected with middle last item envelope return tube, the bottom end of the high pressure axle envelope back-steam main pipe is connected with high pressure axle envelope into vapour main pipe, institute
It states high pressure axle envelope and the side of intermediate pressure cylinder is provided with low pressure (LP) cylinder into the top of vapour main pipe, the one of the high pressure shaft seal return tube
End is connected with gland heater, and the top of the gland heater is connected with water injection pipe, and the top of gland heater is close to note
The side of water pipe is equipped with condenser, and the bottom end of the gland heater is equipped with axial sealing blower fan, and the high pressure axle envelope is into vapour
The bottom end of the side of main pipe is connected with steam inlet pipe, and the bottom end of high pressure axle envelope into the other side of vapour main pipe is connected with heat pump into vapour
Pipe, the high pressure axle envelope are connected with condensed water inlet pipe into the bottom end of vapour main pipe on the inside of heat pump steam inlet pipe and steam inlet pipe,
One end of the heat pump steam inlet pipe is equipped with heat pump, and the top of the heat pump is connected with heat pump return tube, and the high pressure shaft seal returns
The bottom end of steam pipe and middle last item envelope return tube is equipped with oxygen-eliminating device close to the side of heat pump return tube, one end of the steam inlet pipe
Upside is connected with shaft seal overflow pipe, and one end of steam inlet pipe is connected with live steam pipe on the downside of shaft seal overflow pipe, described into vapour
One end of pipe is connected with cold section of reheating pipe on the downside of live steam pipe, and the bottom end of the cold section of pipe of reheating is connected with auxiliary steam
Pipe, one end of the steam inlet pipe are connected with reheat stop valve door rod leakage steam pipe, and steam inlet pipe on the downside of air vent pipework
One end close to reheat stop valve door rod leakage steam pipe on the downside of be connected with high pressure main stop valve door rod leakage steam pipe, the steam inlet pipe
One end is connected with high-pressure governing valve air leakage pipe on the downside of high pressure main stop valve door rod leakage steam pipe.
As a further solution of the present invention: the gland heater is located on the platform that height is 6.3 meters, it is described
High pressure shaft seal return tube and middle last item envelope return tube are respectively positioned on 10.0 meters of platform.
The high pressure shaft seal return tube and middle last item envelope return tube are one as a further solution of the present invention,
Kind outer diameter is the steel pipe of Φ 168, and the high pressure axle envelope back-steam main pipe is the steel pipe that a kind of outer diameter is Φ 219.
One end of medium pressure axle envelope return tube and gland heater connect as a further solution of the present invention,
It connects.
One end of the shaft seal overflow pipe is connect with condenser as a further solution of the present invention,.
As a further solution of the present invention, the top of the heat pump return tube and high pressure shaft seal return tube and in
Last item seals return tube connection.
The vapour source of cold section of reheating pipe and air vent pipework with outside as a further solution of the present invention,
Connection.
The gland heater is a kind of by vapour-gas mixture heat biography as a further solution of the present invention,
Pass the component of the structure of condensed water.
Compared with prior art, the utility model has the beneficial effects that
The utility model by high pressure return tube and in push back after steam pipe comes downwards to 10.0m platform from the platform of 12.3m,
Gland heater is entered back into, cancels U-shaped curved arrangement, high pressure shaft seal return tube and middle last item return tube is respectively converged into one respectively
Φ 168 directly converges from operating layer top into the 219 high pressure axle envelope back-steam main pipe of Φ for operating 10 meters of of absolute altitude under layer, to make
Unit operation mesohigh axle envelope and middle last item envelope emit the elimination of vapour phenomenon, and oil quality of lubricant is qualified, to make high pressure shaft seal and middle pressure
Axle envelope, which emits vapour, causes oil quality of lubricant deterioration problem thoroughly to solve, and guarantees unit operational reliability.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of steam turbine gland system.
In figure: 1, high pressure cylinder；2, high pressure axle envelope back-steam main pipe；3, intermediate pressure cylinder；4, low pressure (LP) cylinder；5, oxygen-eliminating device；6, high pressure
Axle envelope return tube；7, heat pump return tube；8, middle last item seals return tube；9, water injection pipe；10, condenser；11, gland heater；12,
Axial sealing blower fan；13, condensed water inlet pipe；14, heat pump；15, heat pump steam inlet pipe；16, shaft seal overflow pipe；17, live steam pipe；18, reheating
Cold section of pipe；19, air vent pipework；20, reheat stop valve door rod leaks steam pipe；21, high pressure main stop valve door rod leaks steam pipe；22, high
Press pitch air leakage pipe；23, steam inlet pipe；24, high pressure axle envelope is into vapour main pipe.
Specific embodiment
Referring to Fig. 1, in the utility model embodiment, a kind of steam turbine gland system, including high pressure cylinder 1, high pressure cylinder 1
Both ends are respectively connected with high pressure axle envelope back-steam main pipe 2, and the inside of high pressure axle envelope back-steam main pipe 2 is connected with intermediate pressure cylinder 3, high pressure
The top of axle envelope back-steam main pipe 2 is connected with high pressure shaft seal return tube 6, high pressure axle envelope back-steam main pipe 2 close to the outside of high pressure cylinder 1
Top be connected with middle last item envelope return tube 8 close to the outside of intermediate pressure cylinder 3, the bottom end of high pressure axle envelope back-steam main pipe 2 is connected with
High pressure axle envelope is provided with low pressure (LP) cylinder close to the side of intermediate pressure cylinder 3 into the top of vapour main pipe 24 into vapour main pipe 24, high pressure axle envelope
4, one end of high pressure shaft seal return tube 6 is connected with gland heater 11, and the top of gland heater 11 is connected with water injection pipe 9, axis
The top of envelope heater 11 is equipped with condenser 10 close to the side of water injection pipe 9, and the bottom end of gland heater 11 is equipped with axle envelope
Blower 12, the bottom end of high pressure axle envelope into the side of vapour main pipe 24 are connected with steam inlet pipe 23, and high pressure axle envelope is into vapour main pipe 24
The bottom end of the other side is connected with heat pump steam inlet pipe 15, high pressure axle envelope into the bottom end of vapour main pipe 24 close to heat pump steam inlet pipe 15 and into
The inside of steam pipe 23 is connected with condensed water inlet pipe 13, and one end of heat pump steam inlet pipe 15 is equipped with heat pump 14, and the top of heat pump 14 connects
It is connected to heat pump return tube 7, the bottom end that high pressure shaft seal return tube 6 and middle last item seal return tube 8 is pacified close to the side of heat pump return tube 7
Equipped with oxygen-eliminating device 5, shaft seal overflow pipe 16 is connected on the upside of one end of steam inlet pipe 23, one end of steam inlet pipe 23 is close to shaft seal overflow
The downside of pipe 16 is connected with live steam pipe 17, and one end of steam inlet pipe 23 is connected with cold section of pipe 18 of reheating close to the downside of live steam pipe 17,
The bottom end of cold section of pipe 18 of reheating is connected with air vent pipework 19, and one end of steam inlet pipe 23 is connected close to the downside of air vent pipework 19
There is reheat stop valve door rod to leak steam pipe 20, one end of steam inlet pipe 23 connects close to the downside of reheat stop valve door rod leakage steam pipe 20
It is connected to high pressure main stop valve door rod leakage steam pipe 21, one end of steam inlet pipe 23 is connected close to the downside of high pressure main stop valve door rod leakage steam pipe 21
There is high-pressure governing valve air leakage pipe 22.
High pressure shaft seal return tube 6 and middle last item envelope 8 back-steam of return tube are unsmooth in order to prevent, and gland heater 11 is located at height
For on 6.3 meters of platforms, high pressure shaft seal return tube 6 and middle last item envelope return tube 8 are respectively positioned on 10.0 meters of platform, in order to prevent
High pressure shaft seal return tube 6 and middle last item envelope return tube 8 interfere with each other, and high pressure shaft seal return tube 6 and middle last item envelope return tube 8 are
A kind of outer diameter is the steel pipe of Φ 168, and high pressure axle envelope back-steam main pipe 2 is the steel pipe that a kind of outer diameter is Φ 219, in order to make middle last item
8 back-steam of return tube smoothness is sealed, one end of middle last item envelope return tube 8 is connect with gland heater 11, in order to which excess steam to be discharged to
In condenser 10, one end of shaft seal overflow pipe 16 is connect with condenser 10, in order to make opposing steam flow to 6 He of high pressure shaft seal return tube
In middle last item envelope return tube 8, the top of heat pump return tube 7 is connect with high pressure shaft seal return tube 6 and middle last item envelope return tube 8, is
Prevent gland seal system gas leakage when initial start stage, high pressure cylinder be not into vapour or underload, reheating cold section of pipe 18 and auxiliary steam
Pipe 19 is connected to external vapour source, in order to which to condensation Water transport heat, gland heater 11 is a kind of by vapour-gas mixture heat
Amount passes to the component of the structure of condensed water.
Working principle of the utility model is: initial steam pressure is lower when initial start stage, high pressure cylinder 1 be not into vapour or underload,
Gland seal system is supplied respectively to high pressure cylinder 1 and low pressure (LP) cylinder 4, by each by cold section of pipe 18 of reheating and 19 steam supply of air vent pipework at this time
After a axle envelope, some vapor enters the inside of steam turbine, and some vapor seals back-steam by high pressure shaft seal return tube 6 and middle last item
Pipe 8 returns to gland heater 11, returns to condenser 10 finally by axle envelope, and when high load capacity, 1 initial steam pressure of high pressure cylinder is higher, greatly
In gland seal system steam supply, back-steam main pipe 2 is sealed in 1 gas leakage of high pressure cylinder at this time to senior middle school's last item, then will be extra by shaft seal overflow pipe 16
Steam is discharged in condenser 10, is made to form negative pressure in gland heater 11 by axial sealing blower fan 12, is avoided gland seal system back-steam not
Freely, by gland heater 11 by vapour-gas mixture heat transfer to condensed water, for cooling down reheat stop valve door rod leakage vapour
The vapour-gas mixture that pipe 20 and high pressure main stop valve door rod leakage steam pipe 21 are extracted out, removes high pressure shaft seal return tube 6 by oxygen-eliminating device 5
With the oxygen in middle last item envelope return tube 8 in steam.
Claims (8)
1. a kind of steam turbine gland system, including high pressure cylinder (1), which is characterized in that the both ends of the high pressure cylinder (1) are respectively connected with
High pressure axle envelope back-steam main pipe (2) is connected with intermediate pressure cylinder (3), the senior middle school on the inside of the high pressure axle envelope back-steam main pipe (2)
The top of last item envelope back-steam main pipe (2) is connected with high pressure shaft seal return tube (6) on the outside of high pressure cylinder (1), and senior middle school's last item
The top of envelope back-steam main pipe (2) is connected with middle last item envelope return tube (8), the high pressure axle envelope on the outside of intermediate pressure cylinder (3)
The bottom end of back-steam main pipe (2) is connected with high pressure axle envelope into vapour main pipe (24), top of the high pressure axle envelope into vapour main pipe (24)
The side close to intermediate pressure cylinder (3) is held to be provided with low pressure (LP) cylinder (4), one end of the high pressure shaft seal return tube (6) is connected with axle envelope and adds
The top of hot device (11), the gland heater (11) is connected with water injection pipe (9), and the top of gland heater (11) is close to note
The side of water pipe (9) is equipped with condenser (10), and the bottom end of the gland heater (11) is equipped with axial sealing blower fan (12), described
The bottom end of high pressure axle envelope into the side of vapour main pipe (24) is connected with steam inlet pipe (23), and high pressure axle envelope is into vapour main pipe (24)
The bottom end of the other side is connected with heat pump steam inlet pipe (15), and the high pressure axle envelope is into the bottom end of vapour main pipe (24) close to heat pump into vapour
It is connected with condensed water inlet pipe (13) on the inside of pipe (15) and steam inlet pipe (23), one end of the heat pump steam inlet pipe (15) is equipped with vapour
It pumps (14), the top of the heat pump (14) is connected with heat pump return tube (7), the high pressure shaft seal return tube (6) and middle last item envelope
The bottom end of return tube (8) is equipped with oxygen-eliminating device (5) close to the side of heat pump return tube (7), one end of the steam inlet pipe (23)
Upside is connected with shaft seal overflow pipe (16), and one end of steam inlet pipe (23) is connected with main vapour on the downside of shaft seal overflow pipe (16)
It manages (17), one end of the steam inlet pipe (23) is connected with cold section of reheating pipe (18), the reheating on the downside of live steam pipe (17)
The bottom end of cold section of pipe (18) is connected with air vent pipework (19), and one end of the steam inlet pipe (23) is close to air vent pipework (19)
Downside is connected with reheat stop valve door rod leakage steam pipe (20), and one end of steam inlet pipe (23) is leaked close to reheat stop valve door rod
High pressure main stop valve door rod leakage steam pipe (21) is connected on the downside of steam pipe (20), one end of the steam inlet pipe (23) is close to the main vapour of high pressure
High-pressure governing valve air leakage pipe (22) are connected on the downside of valve lever leakage steam pipe (21).
2. a kind of steam turbine gland system according to claim 1, which is characterized in that the gland heater (11) is located at
For on 6.3 meters of platform, the high pressure shaft seal return tube (6) and middle last item envelope return tube (8) are respectively positioned on 10.0 meters and put down height
On platform.
3. a kind of steam turbine gland system according to claim 1, which is characterized in that the high pressure shaft seal return tube (6)
It is the steel pipe that a kind of outer diameter is Φ 168 with middle last item envelope return tube (8), the high pressure axle envelope back-steam main pipe (2) is one kind
Outer diameter is the steel pipe of Φ 219.
4. a kind of steam turbine gland system according to claim 1, which is characterized in that medium pressure axle envelope return tube (8)
One end connect with gland heater (11).
5. a kind of steam turbine gland system according to claim 1, which is characterized in that the one of the shaft seal overflow pipe (16)
End is connect with condenser (10).
6. a kind of steam turbine gland system according to claim 1, which is characterized in that the top of the heat pump return tube (7)
End is connect with high pressure shaft seal return tube (6) and middle last item envelope return tube (8).
7. a kind of steam turbine gland system according to claim 1, which is characterized in that cold section of pipe of the reheating is (18) and auxiliary
Steam pipe (19) is helped to be connected to external vapour source.
8. a kind of steam turbine gland system according to claim 1, which is characterized in that the gland heater (11) is one
Kind is by vapour-gas mixture heat transfer to the component of the structure of condensed water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821025843.7U CN208619177U (en) | 2018-06-30 | 2018-06-30 | A kind of steam turbine gland system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821025843.7U CN208619177U (en) | 2018-06-30 | 2018-06-30 | A kind of steam turbine gland system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208619177U true CN208619177U (en) | 2019-03-19 |
Family
ID=65704278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821025843.7U Withdrawn - After Issue CN208619177U (en) | 2018-06-30 | 2018-06-30 | A kind of steam turbine gland system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208619177U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561190A (en) * | 2018-06-30 | 2018-09-21 | 神华国华广投（柳州）发电有限责任公司 | A kind of steam turbine gland system |
| CN110425011A (en) * | 2019-07-30 | 2019-11-08 | 西安热工研究院有限公司 | A kind of optimal control method of power station steam turbine group axle envelope and valve level leakage steam system |
-
2018
- 2018-06-30 CN CN201821025843.7U patent/CN208619177U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561190A (en) * | 2018-06-30 | 2018-09-21 | 神华国华广投（柳州）发电有限责任公司 | A kind of steam turbine gland system |
| CN108561190B (en) * | 2018-06-30 | 2023-09-26 | 国能广投柳州发电有限公司 | Shaft seal system of steam turbine |
| CN110425011A (en) * | 2019-07-30 | 2019-11-08 | 西安热工研究院有限公司 | A kind of optimal control method of power station steam turbine group axle envelope and valve level leakage steam system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 545600 No. 168, Jianzhong West Road, Luzhai County, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee after: Guoneng guangtou Liuzhou Power Generation Co.,Ltd. Address before: 545600 No. 168, Jianzhong West, Luzhai County, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee before: SHENHUA GUOHUA GUANGTOU (LIUZHOU) POWER GENERATION Co.,Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190319 Effective date of abandoning: 20230926 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190319 Effective date of abandoning: 20230926 |