CN208578589U - A kind of steam turbine gland system of overflow heat recovery cascade utilization - Google Patents
A kind of steam turbine gland system of overflow heat recovery cascade utilization Download PDFInfo
- Publication number
- CN208578589U CN208578589U CN201821154279.9U CN201821154279U CN208578589U CN 208578589 U CN208578589 U CN 208578589U CN 201821154279 U CN201821154279 U CN 201821154279U CN 208578589 U CN208578589 U CN 208578589U
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- China
- Prior art keywords
- steam turbine
- overflow
- shaft end
- axle envelope
- pipe
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- Expired - Fee Related
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a kind of steam turbine gland systems of overflow heat recovery cascade utilization, it includes high pressure shaft end, low pressure shaft end and with high pressure shaft end, the connected axle envelope main pipe (3) in low pressure shaft end, overflow pipe identical with steam turbine operating condition number is arranged at intervals in the axle envelope main pipe, described overflow pipe one end is connected with axle envelope main pipe, the overflow pipe other end is connected from different low-pressure heaters, motor-driven valve is provided on the overflow pipe, steam turbine is under different operating conditions, the overflow pipe that can be controlled respectively by motor-driven valve into the shaft end of axle envelope main pipe leakage vapour enters in low-pressure heater corresponding with operating condition.The utility model can be such that the leakage vapour of the shaft end under different operating conditions in axle envelope main pipe enters in some low-pressure heater corresponding with operating condition by the overflow pipe that electric valve control controls respectively, to make shaft end leakage vapour obtain cascade utilization, not only the energy can be saved, but also the working performance of steam turbine can be improved.
Description
Technical field
The utility model relates to Steam Turbine, the steam turbine gland system being related in steam turbine auxiliary system.
Background technique
Steam turbine gland system is a part of steam turbine auxiliary system, main function be prevent steam to outward leakage and
Air is leak into turbine low pressure cylinder, is collected and using turbine shaft seal, the leakage vapour of valve rod, is realized effective benefit of gland packing leakage
With.The steam of gland seal system leaks vapour from the shaft end of turbine high-pressure part (section), after shaft end leakage vapour is pooled to axle envelope main pipe
It is sent to the low pressure shaft seal section for needing to seal, realizes self sealing of low pressure shaft seal.Generally, high pressure section shaft gland steam leakage is larger,
And sealing vapour amount needed for low pressure stage axle envelope is smaller.Therefore steam turbine gland system is provided with overflow valve to control the ginseng of axle envelope main pipe
Number, by certain grade of low-pressure heater in the steam access heat regenerative system having more than needed in axle envelope main pipe, to reduce the axis of axle envelope high pressure part
Influence of the end leakage vapour to therrmodynamic system economy.
Currently, flooding point in axle envelope main pipe in steam turbine gland system only one, since steam turbine is in different works
The grade for the overflow steam that high pressure part generates under condition is different, and the overflow steam of different grades is all in gland seal system under different operating conditions
The same position is accessed, the overflow steam that the interface position is not achieved is made to be not fully utilized, can not achieve grade in not
The classified utilization of overflow steam energy reduces the economy of unit.
Utility model content
Classification cannot be obtained sufficiently for the shaft end leakage vapour of the turbine high-pressure gland segment in the presence of the above-mentioned prior art
The problem of utilization, the utility model provide it is a kind of can cascade utilization turbine high-pressure gland segment shaft end leakage vapour turbine shaft seal
System.
The technical problems to be solved in the utility model is adopted the technical scheme that: the steam turbine gland system includes height
Last item end, low pressure shaft end and the axle envelope main pipe being connected with high pressure shaft end, low pressure shaft end, be arranged at intervals in the axle envelope main pipe with
The identical overflow pipe of steam turbine operating condition number, described overflow pipe one end are connected with axle envelope main pipe, the overflow pipe other end and different low pressure
Heater is connected, and motor-driven valve is provided on the overflow pipe, and steam turbine leaks under different operating conditions into the shaft end of axle envelope main pipe
The overflow pipe that vapour can be controlled respectively by motor-driven valve enters in low-pressure heater corresponding with operating condition.
The course of work of the utility model is: according to steam turbine difference operating condition, being connected in axle envelope main pipe and operating condition number
Identical overflow pipe, overflow pipe are connected from different low side heaters again.It is described to overflow when steam turbine operating condition number is at three kinds or more
Flow tube quantity mutually should be 3,4,5 ..., be determined according to the actual conditions of gland seal system.It is as described below:
It is that for the moment, motor-driven valve I is opened in steam turbine operating condition, other motor-driven valves are closed, gland seal system overflow heat utilization effect
It is overflow pipe I that it is whereabouts that rate is highest, so as to make into the shaft end of axle envelope main pipe leakage vapour by overflow pipe I and motor-driven valve I into
Enter and is utilized in coupled low-pressure heater；
When steam turbine operating condition is two, motor-driven valve II is opened, and other motor-driven valves are closed, gland seal system overflow heat utilization effect
It is overflow pipe II that it is whereabouts that rate is highest, so as to make the shaft end entered in axle envelope main pipe leakage pass through overflow pipe II and motor-driven valve II
Into being utilized in coupled low-pressure heater；
When steam turbine operating condition is three, motor-driven valve III is opened, and other motor-driven valves are closed, gland seal system overflow heat utilization effect
It is overflow pipe III that it is whereabouts that rate is highest, so as to make to pass through overflow pipe III and motor-driven valve III into the shaft end of axle envelope main pipe leakage vapour
Into being utilized in coupled low-pressure heater.
The rest may be inferred, regardless of the operating condition of steam turbine is how many, the shaft end under different operating conditions in axle envelope main pipe can all be made to leak vapour
It is entered in some low-pressure heater corresponding with operating condition by the overflow pipe that electric valve control controls respectively, so that shaft end be made to leak
Vapour obtains cascade utilization, can not only save the energy, but also the working performance of steam turbine can be improved.
Detailed description of the invention
Fig. 1 is the operation principle schematic diagram of the utility model.
In the figure 1, high pressure section gland packing leakage pipe 2, high pressure section pipe fitting 3, axle envelope main pipe 4, low pressure stage axle envelope into
Steam pipe 5, low pressure stage pipe fitting 6, overflow pipe I 7, overflow pipe II 8, overflow pipe III 9, motor-driven valve I 10, motor-driven valve
II 11, motor-driven valve III 12, overflow pipe fitting I 13, overflow pipe fitting II 14, overflow pipe fitting III.
Specific embodiment
In Fig. 1, the steam turbine gland system includes axle envelope inlet valve, shaft seal overflow valve, high pressure shaft end and low-pressure shaft
End, and the axle envelope main pipe 3 being connected with high pressure shaft end, low pressure shaft end, the axle envelope main pipe 3 are in U-shape, and axle envelope main pipe one end passes through
High pressure section pipe fitting 2 is connected with high pressure section gland packing leakage pipe 1, and the axle envelope main pipe other end passes through low pressure stage pipe fitting 5 and low pressure stage
Axle envelope steam inlet pipe 4 be connected, be arranged at intervals in the axle envelope main pipe three overflow pipes I 6 identical with three operating condition numbers of steam turbine,
Overflow pipe II 7 and overflow pipe III 8, the steam turbine operating condition may be 4,5 or more certainly, then corresponding overflow pipe be 4,
5 or more, the overflow pipe I 6, overflow pipe II 7 and III 8 one end of overflow pipe is connected with axle envelope main pipe, the other end passes through
Overflow pipe fitting I 12, overflow pipe fitting II 13 and overflow pipe fitting III 14 (are not drawn respectively from different low-pressure heaters in figure
It is connected out), motor-driven valve I 9, motor-driven valve II 10 and electricity is respectively arranged on the overflow pipe I 6, overflow pipe II 7 and overflow pipe III 8
Dynamic valve III 11, steam turbine leak the overflow that vapour can be controlled respectively by motor-driven valve under different operating conditions, into the shaft end of axle envelope main pipe
Pipe enters in low-pressure heater corresponding with operating condition.It is above-mentioned to refer into axle envelope main pipe shaft end leakage vapour into axle envelope main pipe
Vapour is leaked in the shaft end that it is extra in addition to for the sealing of low-pressure end axle envelope that vapour is leaked in shaft end, and the axle envelope leakage taken out and needed is sealed into low pressure stage axle envelope
Vapour amount is small, and the shaft gland steam leakage entered in overflow pipe is more.
Claims (2)
1. a kind of steam turbine gland system of overflow heat recovery cascade utilization, it include high pressure shaft end, low pressure shaft end and with height
The connected axle envelope main pipe (3) in last item end, low pressure shaft end, it is characterized in that: being arranged at intervals in the axle envelope main pipe and steam turbine work
The identical overflow pipe of condition number, described overflow pipe one end are connected with axle envelope main pipe, the overflow pipe other end and different low-pressure heater phases
Even, it is provided with motor-driven valve on the overflow pipe, steam turbine can pass through under different operating conditions into the shaft end of axle envelope main pipe leakage vapour
The overflow pipe that motor-driven valve controls respectively enters in low-pressure heater corresponding with operating condition.
2. the steam turbine gland system of a kind of overflow heat recovery cascade utilization according to claim 1, it is characterized in that: institute
It states and is arranged at intervals with three overflow pipes I (6) identical with three operating conditions of steam turbine, overflow pipe II (7) on axle envelope main pipe (3) and overflows
Flow tube III (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821154279.9U CN208578589U (en) | 2018-07-20 | 2018-07-20 | A kind of steam turbine gland system of overflow heat recovery cascade utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821154279.9U CN208578589U (en) | 2018-07-20 | 2018-07-20 | A kind of steam turbine gland system of overflow heat recovery cascade utilization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208578589U true CN208578589U (en) | 2019-03-05 |
Family
ID=65510899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821154279.9U Expired - Fee Related CN208578589U (en) | 2018-07-20 | 2018-07-20 | A kind of steam turbine gland system of overflow heat recovery cascade utilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208578589U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107614A (en) * | 2021-05-20 | 2021-07-13 | 华能安源发电有限责任公司 | Split H-shaped sealing device in small steam turbine of water supply pump of thermal power plant |
-
2018
- 2018-07-20 CN CN201821154279.9U patent/CN208578589U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107614A (en) * | 2021-05-20 | 2021-07-13 | 华能安源发电有限责任公司 | Split H-shaped sealing device in small steam turbine of water supply pump of thermal power plant |
| CN113107614B (en) * | 2021-05-20 | 2023-08-25 | 华能安源发电有限责任公司 | Split H-shaped sealing device of small steam turbine of water feeding pump of thermal power plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190305 Termination date: 20190720 |