CN201671751U - Mixed flow turbine main-axle combination sealing device - Google Patents
Mixed flow turbine main-axle combination sealing device Download PDFInfo
- Publication number
- CN201671751U CN201671751U CN2010201770364U CN201020177036U CN201671751U CN 201671751 U CN201671751 U CN 201671751U CN 2010201770364 U CN2010201770364 U CN 2010201770364U CN 201020177036 U CN201020177036 U CN 201020177036U CN 201671751 U CN201671751 U CN 201671751U
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- China
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- sealing device
- top cover
- seal
- mixed flow
- flow turbine
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Hydraulic Turbines (AREA)
Abstract
The utility model relates to a mixed flow turbine main-axle combination sealing device, belonging to the turbine generator technical field, characterized in that the mixed flow turbine main-axle combination sealing device comprises a labyrinth seal and a helical seal, wherein the labyrinth seal structure way is present between a rotary wheel and a top cover and the helical seal structure way is present between the main axle and the top cover. The mixed flow turbine main-axle combination sealing device has advantages of simple structure, convenient use, stable performance, obvious leakage-stopping effect, stable main-axle operation, good sealing effect, long service life and high generation efficiency.
Description
Technical field
The utility model belongs to technical field of hydraulic generators, particularly relates to a kind of spindle-combined sealing device of mixed-flow water turbine.
Background technique
At present, francis turbine runner is the vitals that hydraulic energy is converted into mechanical energy.In the Francis turbine of power station, domestic main shaft seal uses more end face seal or packing_seal pattern, and there is very technical problem such as quick-wearing, inefficacy of Sealing in more serious power station use with silt under higher line speed.
Summary of the invention
The utility model provides a kind of spindle-combined sealing device of mixed-flow water turbine for solving the technical problem that exists in the known technology.
The purpose of this utility model provides a kind of spindle-combined sealing device of mixed-flow water turbine with simple in structure, easy to use, stable performance, characteristics such as leakage-proof effect is obvious, spindle operation is steady, good sealing effect, long service life, generating efficiency height.
Spiral seal of the present utility model is a kind of very contact seal, be characterized between the obturator or can in sizable scope, also can seal effectively, and make simple, particularly anti-erosion performance is good, sealing is left single head or multiple thread at the sealing surfaces of annular space, screw thread can be opened on fixed cover, also can open (see figure 2) on screw axis.When axle rotates,, make an end fluid be pumped into the other end, promptly so-called " pumping is flowed " as same screw pump.If pump discharge and leakage flow keep balance, then form complete sealing purpose.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of spindle-combined sealing device of mixed-flow water turbine, be characterized in: the hydraulic turbine main shaft combination sealing arrangement comprises labyrinth sealing and spiral seal, be the labyrinth seal structure mode between runner and top cover, be the spiral seal mode of structure between main shaft and top cover.
The utility model can also adopt following technological scheme: described spindle-combined sealing device of mixed-flow water turbine is characterized in: be the spiral seal mode of structure under the runner between ring and base ring, following ring is provided with screw thread.
Described spindle-combined sealing device of mixed-flow water turbine is characterized in: for the spiral seal structure is that main shaft is provided with screw thread, top cover is provided with screw-casing between main shaft and top cover, and spindle thread is relative with the top cover screw-casing to be assembled together.
Advantage and the good effect that the utlity model has are: spindle-combined sealing device of mixed-flow water turbine has been owing to adopted the utility model brand-new technology scheme, solved in the prior art very technical problem such as quick-wearing, inefficacy.The utlity model has simple in structure, easy to use, stable performance, leakage-proof effect is obvious, spindle operation is steady, good sealing effect, long service life, generating efficiency advantages of higher.
Description of drawings
Fig. 1 is the utility model structural representation; Fig. 2 is a spiral seal working principle schematic representation.
Among the figure, 1, packing, 2, screw-casing, 3, screw thread, 4, runner, 5, the labyrinth seal ring, 6, waste pipe, 7, top cover, 8, runner ring down, 9, screw thread.
Embodiment
For further understanding technology contents of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows: consult accompanying drawing 1 and Fig. 2.
1 one kinds of spindle-combined sealing device of mixed-flow water turbine of embodiment comprise labyrinth sealing and spiral seal, 7 labyrinth seal structure modes for employing labyrinth seal ring 5 of runner 4 and top cover; 7 of main shaft and top covers are the spiral seal mode of structure, and main shaft is provided with screw thread 3, and top cover is provided with screw-casing 2, and main shaft is provided with screw thread 3 and top cover screw-casing 2 relative being assembled together.Be the spiral seal mode of structure under the runner between ring 8 and base ring, runner ring 8 down is provided with screw thread.
Concrete structure and working seal effect thereof: main shaft associating sealing structure is by the labyrinth seal ring, screw-casing sealing and packing 1 sealing are formed, labyrinth seal ring between runner crown and top cover plays the first road seal action, part is leaked and is entered crown A chamber, at this moment the reverse water pressure that is installed in the spiral seal formation on main shaft and the top cover plays the second road seal action, analyze according to the power station operational data, A forces down the back lining reverse water pressure that forms in screw-casing, sealability can satisfy the normal service condition of unit basically, but it is many at silt, the power station of condition difference is along with long-time running or sand erosion, the seal ring wearing and tearing, A chamber hydraulic pressure increases when surpassing the reverse water pressure that forms, and leaking on a small quantity can appear in the B chamber, at this moment by waste pipe 6 drainings.In order to guarantee unit bearing safe and reliable operation, present embodiment designs three seals, common gapped sealing and the labyrinth seal of seal form under the runner between ring and the base ring, but for the high concentration of sediment power station, following ring adopts spiral sealing better.According to energy consumption analysis to spiral seal and screw thread 9, sealing energy consumption volumetric loss 3%, this part volumetric loss of while is utilized the generation available power by runner again, and the following ring of institute adopts spiral being sealed with to be beneficial to the runner efficiency raising.
From encircling the angle of resistance to wearing down, do not adopt the following ring of spiral seal, relative velocity is higher, adopts the following ring of spiral seal then can reduce flow velocity, and plays the effect of resistance to wearing, increasing the service life.Can guarantee to wait until Xiu Gedao sealing again when unit normally overhauls like this.
Claims (3)
1. spindle-combined sealing device of mixed-flow water turbine, it is characterized in that: the hydraulic turbine main shaft combination sealing arrangement comprises labyrinth sealing and spiral seal, is the labyrinth seal structure mode between runner and top cover, is the spiral seal mode of structure between main shaft and top cover.
2. according to the described spindle-combined sealing device of mixed-flow water turbine of claim 1, it is characterized in that: be the spiral seal mode of structure under the runner between ring and base ring, following ring is provided with screw thread.
3. according to claim 1 or 2 described spindle-combined sealing device of mixed-flow water turbine, it is characterized in that: for the spiral seal structure is that main shaft is provided with screw thread, top cover is provided with screw-casing between main shaft and top cover, and spindle thread is relative with the top cover screw-casing to be assembled together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201770364U CN201671751U (en) | 2010-04-30 | 2010-04-30 | Mixed flow turbine main-axle combination sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201770364U CN201671751U (en) | 2010-04-30 | 2010-04-30 | Mixed flow turbine main-axle combination sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201671751U true CN201671751U (en) | 2010-12-15 |
Family
ID=43329163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201770364U Expired - Fee Related CN201671751U (en) | 2010-04-30 | 2010-04-30 | Mixed flow turbine main-axle combination sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201671751U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825179A (en) * | 2010-04-30 | 2010-09-08 | 天津市天发重型水电设备制造有限公司 | Spindle-combined sealing device of mixed-flow water turbine |
| CN102297072A (en) * | 2011-08-04 | 2011-12-28 | 中国水电顾问集团西北勘测设计研究院 | Device and method for regulating and controlling leakage-stopping sealed gap of rotating wheel of high-waterhead mixed flow type water turbine |
-
2010
- 2010-04-30 CN CN2010201770364U patent/CN201671751U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825179A (en) * | 2010-04-30 | 2010-09-08 | 天津市天发重型水电设备制造有限公司 | Spindle-combined sealing device of mixed-flow water turbine |
| CN102297072A (en) * | 2011-08-04 | 2011-12-28 | 中国水电顾问集团西北勘测设计研究院 | Device and method for regulating and controlling leakage-stopping sealed gap of rotating wheel of high-waterhead mixed flow type water turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20130430 |