CN203130332U - Water turbine runner center flow guide cylinder structure - Google Patents
Water turbine runner center flow guide cylinder structure Download PDFInfo
- Publication number
- CN203130332U CN203130332U CN201320041407XU CN201320041407U CN203130332U CN 203130332 U CN203130332 U CN 203130332U CN 201320041407X U CN201320041407X U CN 201320041407XU CN 201320041407 U CN201320041407 U CN 201320041407U CN 203130332 U CN203130332 U CN 203130332U
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- CN
- China
- Prior art keywords
- guide cylinder
- unit
- diameter
- runner
- water turbine
- 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 - 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
Abstract
In order to solves the problems that in the prior art, due to the facts that flow separation of part of water current occurs in the water current, close to a water outlet edge, of a runner center, and the water current is not stable, a unit vibrates, swing of the unit is increased, and hidden hangers are caused to efficient, safe and stable operation of the unit, the utility model provides a water turbine runner center guide cylinder structure. The water turbine runner center guide cylinder structure comprises a runner and an air guide cylinder, wherein a guide cylinder is arranged outside the lower end of the air guide cylinder in the center of the runner, and the central axis of the air guide cylinder and the central axis of the guide cylinder are arranged on the same straight line. The guide cylinder comprises two sections of column-shaped cylinders which are different in diameter, one section with a smaller diameter is arranged at the position of water outlet in the center of the runner, the diameter of the section is slightly larger than the outer diameter of the air guide cylinder, and the other section with a larger diameter is connected with the section with the smaller diameter through a step, and is arranged at the lower end of an outlet of the air guide cylinder. The water turbine runner center guide cylinder structure has the advantages that a low-load area of the unit is improved, vibration and swing of the unit are reduced, and efficient, safe and stable operation of the unit is ensured.
Description
Technical field
The utility model relates to a kind of water turbine guide shell structure, specially refers to a kind of rotary wheel of water turbine central draft tube structure.
Background technique
Francis turbine is in running, and the runner center can form negative pressuren zone, need carry out tonifying Qi.Usually the tonifying Qi mode has the tonifying Qi of hydraulic turbine main shaft center hole, draft tube tonifying Qi frame tonifying Qi and top cover forced air supply etc.The purpose of tonifying Qi is to reduce the degree of vacuum at runner center, and the operation efficient, safe, stable for unit provides safeguard.Francis turbine along with the variation of load to the demand of air compensation also in continuous variation.The prior art air admission to main shaft central hole can satisfy the tonifying Qi demand of unit, but be in low load region at unit, be that the guide vanes of water turbine opening is in little open state, under the little situation of unit flow, the runner center part separation of flow can occur near the current that go out the waterside, and flow instability causes that unit vibration, swing increase, influence the efficient of unit, efficient, safe, the stable operation of unit has been brought hidden danger.Obviously, prior art exists the runner center and the part separation of flow occurs near the current that go out the waterside, and flow instability causes that unit vibration, swing increase, and efficient, safe, the stable operation of unit has been brought problems such as hidden danger.
The model utility content
Occur the part separation of flow for solving the runner center that prior art exists near the current that go out the waterside, flow instability causes that unit vibration, swing increase, and efficient, safe, the stable operation of unit has been brought problems such as hidden danger.The utility model proposes a kind of rotary wheel of water turbine central draft tube structure.
A kind of rotary wheel of water turbine central draft tube structure comprises runner and gas cylinder, it is characterized in that: outer installment has guide shell in gas cylinder lower end, runner center, and the central axis of described gas cylinder and guide shell is on same straight line; Guide shell comprises two sections cylindrical drum that diameter is different, less one section of diameter is arranged on runner center water outlet place, and diameter is more bigger than the external diameter of gas cylinder, and diameter bigger a section is connected by less one section of step and diameter, and is arranged on gas cylinder outlet lower end.
The useful technique effect of the utility model rotary wheel of water turbine central draft tube structure is that the unit low load region improves, and has reduced unit vibration and swing, guarantees the operation that unit can be efficient, safe, stable.
Description of drawings
Accompanying drawing 2 is the structural representation of the utility model rotary wheel of water turbine central draft tube structure.
Below in conjunction with the drawings and specific embodiments the utility model rotary wheel of water turbine central draft tube structure is further described.
Embodiment
Accompanying drawing 1 is the structural representation of prior art water turbine, and among the figure, 1 is main shaft, and 2 is top cover, and 3 is runner, and 4 is gas cylinder.As seen from the figure, the 1 center hole tonifying Qi of prior art main shaft can be satisfied the tonifying Qi demand of unit, but be in low load region at unit, be that the guide vanes of water turbine opening is in little open state, under the little situation of unit flow, runner 3 centers the part separation of flow can occur near the current that go out the waterside, flow instability, cause that unit vibration, swing increase, influence the efficient of unit, efficient, safe, the stable operation of unit has been brought hidden danger.Obviously, prior art exists the runner center and the part separation of flow occurs near the current that go out the waterside, and flow instability causes that unit vibration, swing increase, and efficient, safe, the stable operation of unit has been brought problems such as hidden danger.
Accompanying drawing 2 is the structural representation of the utility model rotary wheel of water turbine central draft tube structure, and among the figure, 1 is main shaft, and 2 is top cover, and 3 is runner, and 4 is gas cylinder, and 5 is guide shell.As seen from the figure, a kind of rotary wheel of water turbine central draft tube structure comprises runner 3 and gas cylinder 4, in runner 3 center gas cylinders 4 lower end outer installment guide shell 5 is arranged, and the central axis of gas cylinder 4 and guide shell 5 is on same straight line; Guide shell 5 comprises two sections cylindrical drum that diameter is different, less one section of diameter is arranged on runner 3 center water outlets place, and diameter is more bigger than the external diameter of gas cylinder 4, and diameter bigger a section is connected by less one section of step and diameter, and is arranged on gas cylinder 4 outlet lower ends.The utility model rotary wheel of water turbine central draft tube structure solves Francis turbine at the flow instability of low-load region, and unit vibration, swing increase the hidden danger of bringing.Outside runner 3 center gas cylinders 4 guide shell 5 is set, the space that the separation of flow forms when reducing low-load, small flow is converged current uniformly and to be guided the downstream into, and the efficient of unit is tended towards stability.Form big tonifying Qi space in simultaneously in guide shell 5, buffer function is played in tonifying Qi, reduced unit vibration, swing.When big flow, current can converge and flow to the downstream smoothly, to the not influence of operation of unit.By setting up guide shell 5, the low load region of unit improves, and guarantees the operation that unit can be efficient, safe, stable.
The useful technique effect of the utility model rotary wheel of water turbine central draft tube structure is that the unit low load region improves, and has reduced unit vibration and swing, guarantees the operation that unit can be efficient, safe, stable.
Claims (1)
1. a rotary wheel of water turbine central draft tube structure comprises runner and gas cylinder, it is characterized in that: outer installment has guide shell in gas cylinder lower end, runner center, and the central axis of described gas cylinder and guide shell is on same straight line; Guide shell comprises two sections cylindrical drum that diameter is different, less one section of diameter is arranged on runner center water outlet place, and diameter is more bigger than the external diameter of gas cylinder, and diameter bigger a section is connected by less one section of step and diameter, and is arranged on gas cylinder outlet lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320041407XU CN203130332U (en) | 2013-01-25 | 2013-01-25 | Water turbine runner center flow guide cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320041407XU CN203130332U (en) | 2013-01-25 | 2013-01-25 | Water turbine runner center flow guide cylinder structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203130332U true CN203130332U (en) | 2013-08-14 |
Family
ID=48938320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320041407XU Expired - Fee Related CN203130332U (en) | 2013-01-25 | 2013-01-25 | Water turbine runner center flow guide cylinder structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203130332U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742335A (en) * | 2014-01-04 | 2014-04-23 | 峨眉山市驰骋机械制造有限公司 | Dual regulation water guiding mechanism of double rotation wheel water turbine |
| CN103982357A (en) * | 2014-05-26 | 2014-08-13 | 哈尔滨电机厂有限责任公司 | Flow guide structure at water turbine runner outlet capable of weakening vortex strip of draft tube |
| CN104728022A (en) * | 2015-03-16 | 2015-06-24 | 中国长江电力股份有限公司 | Suspended device for fixing tail end of lower blowdown pipe of large hydropower station unit |
| CN111581870A (en) * | 2020-06-04 | 2020-08-25 | 重庆水轮机厂有限责任公司 | Design method for fixed guide vane of axial-flow propeller turbine |
-
2013
- 2013-01-25 CN CN201320041407XU patent/CN203130332U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742335A (en) * | 2014-01-04 | 2014-04-23 | 峨眉山市驰骋机械制造有限公司 | Dual regulation water guiding mechanism of double rotation wheel water turbine |
| CN103742335B (en) * | 2014-01-04 | 2016-06-08 | 峨眉山市驰骋机械制造有限公司 | The double; two of double-rotary-wheel water turbine regulate water distributor |
| CN103982357A (en) * | 2014-05-26 | 2014-08-13 | 哈尔滨电机厂有限责任公司 | Flow guide structure at water turbine runner outlet capable of weakening vortex strip of draft tube |
| CN104728022A (en) * | 2015-03-16 | 2015-06-24 | 中国长江电力股份有限公司 | Suspended device for fixing tail end of lower blowdown pipe of large hydropower station unit |
| CN111581870A (en) * | 2020-06-04 | 2020-08-25 | 重庆水轮机厂有限责任公司 | Design method for fixed guide vane of axial-flow propeller turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20160125 |
|
| EXPY | Termination of patent right or utility model |