CN2833118Y - Gland seal circuit of steam turbine - Google Patents
Gland seal circuit of steam turbine Download PDFInfo
- Publication number
- CN2833118Y CN2833118Y CN 200520087011 CN200520087011U CN2833118Y CN 2833118 Y CN2833118 Y CN 2833118Y CN 200520087011 CN200520087011 CN 200520087011 CN 200520087011 U CN200520087011 U CN 200520087011U CN 2833118 Y CN2833118 Y CN 2833118Y
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- steam
- valve
- sealing pipeline
- gland seal
- communicated
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Abstract
The utility model discloses a novel gland seal system of a steam turbine, which comprises a front gland seal, a back gland seal and a first sealing pipeline which is communicated with a front gland seal steam chamber, a main steam valve and a back gland seal steam valve. The back gland seal steam chamber is also at least matched with a second sealing pipeline which is communicated with one steam source of regulated extraction steam, non-regulated extraction steam and the main steam of the steam turbine. The second sealing pipeline and the first sealing pipeline are connected in parallel. A first valve and a second valve which are communicated with the back gland seal steam chamber are separately arranged on the first sealing pipeline and the second seal pipeline. A branch pipeline which is communicated with a condenser of the steam turbine is arranged on the side close to the steam inlet of the first valve on the first sealing pipeline, and a third valve is arranged on the branch pipeline. The gland seal system of a steam turbine not only can guide out the leaking steam of the front gland seal in time to prevent the leaking steam from entering a bearing chamber, but also can assure the seal of the back gland seal; only the original gland seal system needs to be modified a little, so the gland seal system has the advantages of convenient installation and simple structure, and the new system and the original system can be mutually switched.
Description
Technical field
The utility model relates to the gland seal system that a kind of steam turbine is used.
Background technique
Modern steam turbine gland system common design is that forward and backward axle envelope direct or indirect (by surge tank, gland heater) is connected to holistic gland seal system, when unit normally moves, utilize front axle envelope (claim not only high pressure shaft seal) to leak vapour or mix other bar in the surge tank and leak vapour rear shaft seal (but also claiming low pressure shaft seal) is sealed; Open, stop at unit or during underrun, introduce main steam gland seal system is sealed.But in actual motion, the variation of unit operation operating mode, operations staff's reasons such as misoperation all can cause the wearing and tearing or the damage of shaft sealing gear.When the shaft sealing gear of current axis envelope damages, the leakage rate of front axle envelope increases, and when it increased to a certain degree, steam can be in rotating shaft of steam turbine be scurried into bearing chamber, finally cause the water inlet of steam turbine turbine oil, oil to worsen, the safe operation of steam turbine set in serious threat.
Summary of the invention
The purpose of this utility model just is to provide a kind of steam of can effectively stopping to enter bearing chamber and simple novel steam machine gland seal system.
Its technological scheme is as follows:
A kind of novel steam arbor seals system, comprise front axle envelope, rear shaft seal and be communicated with the sealing pipeline I that front axle seals steam chest, main steam and rear shaft seal steam chest, described rear shaft seal steam chest is furnished with at least also that the adjustment of a connection steam turbine is drawn gas, non-adjustment is drawn gas, the sealing pipeline II in a vapour source in the main steam, and described sealing pipeline II and described sealing pipeline I are parallel-connection structure; And being furnished with valve I, valve II respectively is communicated with the rear shaft seal steam chest; Described sealing pipeline I goes up near valve I steam inlet one side and also is provided with the branch line that is communicated with the condenser of steam turbine, and described branch line is provided with valve III.
Adopt the steam turbine gland system of this structure, when steam turbine in normal course of operation, but throttle down I, open valve II, valve III, utilize sealing pipeline II to give rear shaft seal steam chest steam supply, and the leakage vapour of front axle envelope steam chest enters in the condenser by sealing pipeline I and branch line thereof, so both the leakage vapour of front axle envelope in time can be led away, prevent that it from scurrying in the bearing chamber, again can by utilize adjust draw gas, non-adjustment is drawn gas or main steam guarantees the sealing of rear shaft seal; Open, stop at steam turbine or during underrun, but temporary close valve II, valve III open valve I and switch to primitive axis envelope system, utilize main steam to guarantee the sealing of gland seal system.This gland seal system only needs to reequip slightly on original gland seal system and can realize, when causing the steam turbine set shaft sealing gear, certain reason damages, before shaft gland steam leakage excessively cause in the oil water inlet, when oil worsens, (24 hours) are by dress, operation native system at short notice, in addition native system convenient, simple in structure by dress, do not influence the characteristics that can switch mutually between original system, few, the new system of material therefor and the original system, very worthly apply in practice.
What above-mentioned sealing pipeline II was communicated with can be to adjust to draw gas and the rear shaft seal steam chest, and adjusting draws gas itself is easy to obtain, and pressure, temperature are more constant, and easy connecting pipeline.
Also combined pressure and vacuum gauge can be set on the above-mentioned sealing pipeline I, can in time monitor pressure among the sealing pipeline I, in time make corresponding adjustment thereby be beneficial to by this combined pressure and vacuum gauge.
Description of drawings
Figure is a kind of mode of execution structural representation of the utility model;
Each unit number explanation among the figure:
1, steam turbine; 2, condenser; 3, front axle envelope; 4, rear shaft seal; 5, valve I; 6, combined pressure and vacuum gauge; 7, valve II; 8, main steam valve; 9, sealing pipeline I; 10, sealing pipeline II; 11, valve III
Embodiment
Below in conjunction with accompanying drawing the utility model is done further explanation:
As shown be the sketch of this novel steam arbor envelope system, this gland seal system mainly comprises front axle envelope 3, rear shaft seal 4 and sealing pipeline I9, sealing pipeline II10, the end of sealing pipeline I is communicated with rear shaft seal 4 steam chests, the steam chest and the main steam valve 8 of the axle envelope 3 that the other end is communicated with respectively; The end of sealing pipeline II10 is communicated with the adjustment extraction line of steam turbine 1, and the other end is communicated with the steam chest of rear shaft seal 4.Also be furnished with valve I5 and valve II7 on sealing pipeline I9 and the sealing pipeline II10 respectively; Steam inlet one side that sealing pipeline I9 goes up near valve I5 also is provided with the branch line that is communicated with the condenser of steam turbine, branch line is provided with valve III11, also be provided with combined pressure and vacuum gauge 6 on the sealing pipeline I,, in time make corresponding adjustment thereby be beneficial to pressure among the timely monitoring sealing pipeline I.
Operation method when adopting above-mentioned novel gland seal system:
1, open, stop or underrun when unit, when adjusting suction pressure and can not satisfy the rear shaft seal sealing, but throttle down II7, valve III11 open valve I5 and main steam valve 8, adjust 8 pairs of gland seal system steam supplies of main steam valve;
2, normally move when adjusting extraction pressure and can satisfy the rear shaft seal sealing when unit: but throttle down I5 and main steam valve 8, and open valve II7, valve III, utilize adjustment to draw gas rear shaft seal is sealed, and preceding gland packing leakage can be imported in the condenser 2 by branch line.This moment, the effect of valve I5 was that whole gland seal system has been isolated into two independently subsystems, and promptly the front axle envelope is let out vapour system and rear shaft seal steam-supplying system, and two subsystems work alone separately, are independent of each other.
Certainly, the utility model is not limited in above a kind of mode of execution, and it can also have some conspicuous variations as the case may be, and for example above-mentioned sealing pipeline II can be communicated with also that non-adjustment is drawn gas, main steam is as the vapour source, is rear shaft seal system steam supply.This gland seal system only needs to reequip slightly on original gland seal system and can realize, when causing the steam turbine set shaft sealing gear, certain reason damages, before shaft gland steam leakage excessively cause in the oil water inlet, when oil worsens, can be at short notice by dress, operation native system, in addition native system convenient, simple in structure by dress, do not influence the characteristics that can switch mutually between original system (installing Shi Buxu additional), few, the new system of material therefor and the original system to major overhaul, very worthly apply in practice.
Claims (3)
1, a kind of novel steam arbor seals system, comprise front axle envelope, rear shaft seal and be communicated with the sealing pipeline I that front axle seals steam chest, main steam and rear shaft seal steam chest, it is characterized in that: described rear shaft seal steam chest be furnished with at least also that the adjustment of a connection steam turbine is drawn gas, non-adjustment is drawn gas or main steam in the sealing pipeline II in a vapour source, described sealing pipeline II and described sealing pipeline I are parallel-connection structure; Being furnished with valve I, valve II on described sealing pipeline I and the sealing pipeline II respectively is communicated with the rear shaft seal steam chest; Described sealing pipeline I goes up near valve I steam inlet one side and also is provided with the branch line that is communicated with the condenser of steam turbine, and described branch line is provided with valve III.
2, novel steam arbor according to claim 1 seals system, it is characterized in that: what described sealing pipeline II was communicated with is to adjust to draw gas and the rear shaft seal steam chest.
3, novel steam arbor according to claim 1 and 2 seals system, and it is characterized in that: sealing pipeline I is provided with combined pressure and vacuum gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087011 CN2833118Y (en) | 2005-09-07 | 2005-09-07 | Gland seal circuit of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087011 CN2833118Y (en) | 2005-09-07 | 2005-09-07 | Gland seal circuit of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2833118Y true CN2833118Y (en) | 2006-11-01 |
Family
ID=37197431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520087011 Expired - Fee Related CN2833118Y (en) | 2005-09-07 | 2005-09-07 | Gland seal circuit of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2833118Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375189A (en) * | 2012-04-13 | 2013-10-30 | 通用电气公司 | Shaft sealing system for steam turbines |
| CN103975131A (en) * | 2011-12-08 | 2014-08-06 | 斯奈克玛 | System for sealing an oil chamber from an adjoining exterior volume and turbo-machine provided with such a sealing system |
| US9540942B2 (en) | 2012-04-13 | 2017-01-10 | General Electric Company | Shaft sealing system for steam turbines |
| CN106894850A (en) * | 2017-04-26 | 2017-06-27 | 全南县韬寻机械设备开发有限公司 | A kind of device for preventing gasoline engine from leaking vapour |
-
2005
- 2005-09-07 CN CN 200520087011 patent/CN2833118Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103975131A (en) * | 2011-12-08 | 2014-08-06 | 斯奈克玛 | System for sealing an oil chamber from an adjoining exterior volume and turbo-machine provided with such a sealing system |
| CN103975131B (en) * | 2011-12-08 | 2016-06-15 | 斯奈克玛 | Turbogenerator |
| CN103375189A (en) * | 2012-04-13 | 2013-10-30 | 通用电气公司 | Shaft sealing system for steam turbines |
| CN103375189B (en) * | 2012-04-13 | 2016-03-16 | 通用电气公司 | For the axle sealing system of steamturbine |
| US9540942B2 (en) | 2012-04-13 | 2017-01-10 | General Electric Company | Shaft sealing system for steam turbines |
| CN106894850A (en) * | 2017-04-26 | 2017-06-27 | 全南县韬寻机械设备开发有限公司 | A kind of device for preventing gasoline engine from leaking vapour |
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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 |