CN202971016U - Ultra-low specific speed mixed flow water turbine without guide blades for cooling tower - Google Patents
Ultra-low specific speed mixed flow water turbine without guide blades for cooling tower Download PDFInfo
- Publication number
- CN202971016U CN202971016U CN2012206896300U CN201220689630U CN202971016U CN 202971016 U CN202971016 U CN 202971016U CN 2012206896300 U CN2012206896300 U CN 2012206896300U CN 201220689630 U CN201220689630 U CN 201220689630U CN 202971016 U CN202971016 U CN 202971016U
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- CN
- China
- Prior art keywords
- ultra
- low specific
- specific speed
- water turbine
- cooling tower
- 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
The utility model relates to an ultra-low specific speed mixed flow water turbine without guide blades for a cooling tower. The ultra-low specific speed mixed flow water turbine can effectively solve the problems that a stand ring with the guide blades is not easy to produce, hydraulic loss is caused, and hydraulic efficiency of a water turbine is low. The technical scheme includes that the ultra-low specific speed mixed flow water turbine without the guide blades comprises a volute and a turning wheel. A stand ring without the guide blades is installed in an outlet of a volute type flume and is provided with an ultra-low specific speed mixed flow running wheel, an outlet of a runner chamber of the ultra-low specific speed mixed flow running wheel is connected with a draft tube which is arranged on the lower portion of the runner chamber. The ultra-low specific speed mixed flow water turbine without the guide blades for the cooling tower is simple in structure, easy to produce, little in the hydraulic loss, high in working efficiency and saving in energy.
Description
Technical field
The utility model relates to cooling tower equipment, particularly a kind of used for cooling tower Ultra-low Specific speed Francis turbine without stator.
Background technique
Cooling tower is equipment commonly used in industrial production, it is the pressure margin of utilizing the cooling tower water system to leave, drive blower fan of cooling tower with a kind of water turbine, can be at alternative former blower fan drive motor, reach energy-conservation and subtract the reduced-maintenance purpose, but the water turbine that uses at present is due to the problem that exists on structure, the seat ring of " double-runner ultra-low specific speed axial flow hydraulic turbine for driving " that comprise application number 201010180778.7 that particularly uses at present all comprises fixed guide vane, and that the stator hydraulic loss accounts for the proportion of whole hydraulic loss is larger.As the aerofoil profile stator, the effect of squeezing of current is made that in stator, flow velocity is up to 12-13m/s, the seat ring hydraulic loss is larger, can reach more than 10%; And equal thickness stator seat ring is to the effect of squeezing of current, can make more than peak flow rate (PFR) reaches 14m/s, causes the seat ring hydraulic loss up to 14%-15%, do not meet energy-conservation principle, and having stator seat ring difficulty of processing large, manufacturing efficiency is low, so its improvement and bring new ideas is imperative.
Summary of the invention
For above-mentioned situation, for overcoming the defective of prior art, the purpose of the utility model just is to provide a kind of used for cooling tower Ultra-low Specific speed Francis turbine without stator and can have effectively solved the difficult production of stator seat ring and cause hydraulic loss, and the low problem of the hydraulic efficiency of water turbine.
The technological scheme that the utility model solves is, comprise spiral case and runner, the in-built stator seat ring that has or not of scroll casing type flume outlet is equipped with Ultra-low Specific speed francis turbine runner without the stator seat ring through main shaft, and the runner envelope outlet of Ultra-low Specific speed francis turbine runner is connected with the bottom draft tube.
The utility model is simple in structure, is easy to produce, and hydraulic loss is little, and high working efficiency is energy-conservation.
Description of drawings
Fig. 1 is structural front view of the present utility model.
Fig. 2 is A-A sectional drawing in the utility model Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.
Shown in Fig. 1,2, the utility model comprises spiral case and runner, the scroll casing type flume outlet 1 in-built stator seat ring 2 that has or not is equipped with Ultra-low Specific speed francis turbine runner 3 without the stator seat ring through main shaft, and runner envelope 4 outlets of Ultra-low Specific speed francis turbine runner are connected with bottom draft tube 5.
Described spiral case is that the section of metal casting is circular spiral case.
For guaranteeing to have enough strength and stiffness and satisfy the requirement of bearing water turbine rotatable parts weight without the stator seat ring, described spiral case section is circular, and the employing forging type, its Thickness Ratio has fixed guide vane larger, and concrete thickness will be determined by the calculating of strength and stiffness.
Described its specific speed of Ultra-low Specific speed francis turbine runner is 40-60mkW.
Working condition of the present utility model is that for ease of the hydraulic efficiency of the hydraulic loss of processing and the reduction stator causes, raising water turbine, the utility model is designed to without the special-purpose Ultra-low Specific speed of the cooling tower of stator mixed-flow wheel machine.General water turbine, regulate circular rector by stator, the circular rector without the special-purpose Ultra-low Specific speed of the cooling tower of stator Francis turbine that the utility model proposes form by spiral case, without the stator seat ring by changing the method for spiral case cross-sectional area and section centre distance, make current satisfy the requirement of runner import circular rector.Because of without stator, stream formed hydraulic loss and stator to the effect of squeezing of current thereby eliminated stator in the seat ring, the seat ring flow field is even; The seat ring hydraulic loss greatly reduces, and can be reduced to 5% left and right; And simple in structure, be convenient to processing and reliable.
The utility model has solved the scope of the special-purpose ultra-low specific speed mixed-flow type turbine specific speed of existing cooling tower ns between 40～60mkW) in the seat ring fixed guide vane problem that is difficult to process to the reduction that squeezing the hydraulic efficiency that acts on and cause of current with because of guide vane height too low (stator relative height 0.065～0.1 between).The main technical schemes of taking is to satisfy under the condition of requirement of strength, adopts the seat ring structure without stator.The water turbine of this structure does not have stator to the squeezing of current owing to having stator to stream loss yet, and the current in seat ring are even, improved the whole efficiency of unit; At this moment, the spiral case of the required import circular rector of runner and realizing by changing spiral case cross-sectional area and section centre distance without the stator seat ring.The required strength and stiffness of water wheels-blower fan group will be determined by calculating, generally will be satisfied by the thickness that increases spiral case.
Can be found out by said structure, the utility model is simple in structure, is easy to produce, and efficient is high, can be widely used in driving blower fan of cooling tower, compared with prior art, has following outstanding characteristics:
1, compare with equal thickness stator seat ring, aerofoil profile stator seat ring commonly used, the utility model is also without the fast Francis turbine of the Ultra-low Specific of movable guide vane without fixed guide vane, hydraulic loss that stator streams and stator have been eliminated to the effect of squeezing of current, improved flowing in the seat ring, make the interior flow velocity of seat ring even, the seat ring hydraulic loss greatly reduces; More because of seat ring loss minimizing, turbine efficiency is greatly improved.
2, the required circular rector of water turbine by spiral case, jointly form without stator seat ring and runner, effectively reduces the hydraulic loss of spiral case, seat ring, and the whole efficiency of water turbine has also obtained improving significantly.
3, because of without stator, thus simple in structure, for the manufacturing of water turbine, install very big convenience is provided.
4, can satisfy the requirement of the strength and stiffness of water wheels-blower fan group by the thickness that increases spiral case, be the innovation on water turbine.
Claims (3)
1. one kind without the used for cooling tower Ultra-low Specific of stator speed Francis turbine, comprise spiral case and runner, it is characterized in that, scroll casing type flume outlet (1) in-built stator seat ring (2) that has or not, through main shaft, Ultra-low Specific speed francis turbine runner (3) is housed without the stator seat ring, runner envelope (4) outlet of Ultra-low Specific speed francis turbine runner is connected with bottom draft tube (5).
2. the used for cooling tower Ultra-low Specific speed Francis turbine without stator according to claim 1, is characterized in that, described spiral case is that the section of metal casting is circular spiral case.
3. the used for cooling tower Ultra-low Specific speed Francis turbine without stator according to claim 1, is characterized in that, described its specific speed of Ultra-low Specific speed francis turbine runner is 40-60mkW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206896300U CN202971016U (en) | 2012-12-14 | 2012-12-14 | Ultra-low specific speed mixed flow water turbine without guide blades for cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206896300U CN202971016U (en) | 2012-12-14 | 2012-12-14 | Ultra-low specific speed mixed flow water turbine without guide blades for cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971016U true CN202971016U (en) | 2013-06-05 |
Family
ID=48512101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206896300U Expired - Fee Related CN202971016U (en) | 2012-12-14 | 2012-12-14 | Ultra-low specific speed mixed flow water turbine without guide blades for cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971016U (en) |
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2012
- 2012-12-14 CN CN2012206896300U patent/CN202971016U/en not_active Expired - Fee Related
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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: 20130605 Termination date: 20151214 |
|
| EXPY | Termination of patent right or utility model |