CN207333084U - The Francis turbine of imitative capitate runner - Google Patents
The Francis turbine of imitative capitate runner Download PDFInfo
- Publication number
- CN207333084U CN207333084U CN201720551549.9U CN201720551549U CN207333084U CN 207333084 U CN207333084 U CN 207333084U CN 201720551549 U CN201720551549 U CN 201720551549U CN 207333084 U CN207333084 U CN 207333084U
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- runner
- spiral case
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- blade
- turbine
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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 discloses a kind of Francis turbine of imitative capitate runner, runner is welded to connect by imitative capitate crown (8) with curved surface bucket (7), ring under circle (6) is welded and fixed on blade (7), spiral case (1) carries current inlet port, biserial grid (2) are welded in spiral case, the main shaft connection runner (4) of spiral case (1), spiral case (1) connection draft tube (5).The utility model reduces amplitude of pressure fluctuation and noise in range of operation.As a part for runner, blade is filled up and has gone out to flow low-pressure area, played the boosting of reverse water pump, the effective vortex suppressed in runner channel, improves flow condition, expand the high-efficiency operation area of the hydraulic turbine, reduce hydraulic vibration；At the same time the hydraulic turbine have it is simple in structure, easy to loading and unloading, processing cost is low, it is applied widely the characteristics of, can meet the operation of unit efficient stable.
Description
Technical field：
It the utility model is related to a kind of Francis turbine of imitative capitate runner.
Background technology：
Francis turbine is compact-sized, and efficiency is higher, adapts to very wide head scope, is that current countries in the world are extensive
One of hydraulic turbine pattern of use.It is suitable for head from the range of 20 meters to 700 meters, and mechanism is simple, stable, and
Efficient, unit power output is from tens kilowatts to hundreds of thousands kilowatt, and Francis turbine unit maximum output has reached 100 at present
Ten thousand kilowatts.Efficiency, cavitation and stability are three big important indicators of turbine hydraulic performance.Wherein, relationship between efficiency to water can
Producing level, cavitation are related to the service life of runner, and stability be then related to unit can normal operation.Influencing water wheels
In the factor of machine stability, hydraulic vibration and noise are most common, and pressure fluctuation of hydraulic turbine is to cause hydraulic vibration and make an uproar
The major incentive of sound, pressure fluctuation of hydraulic turbine will cause output of hydraulic turbine to swing, so as to make a difference to electric system.The hydraulic turbine
Pressure fluctuation is to influence one of principal element of set steady, pressure fluctuation can not only cause the vibration of unit, contribute swing,
Blade cracks and the tear of tail water tube wall etc., and can even cause when pressure fluctuation is violent being total to for workshop or adjacent buildings
Shake, this directly threatens the safe operation in whole power station.
When Francis turbine operates in off-design operating mode, shock, blade exit shape will be produced in runner bucket import
Mouth is measured into band.Especially in sub-load and big flow area, rotation vortex rope and column vortex rope will be formed, cause flowing unstable
It is fixed, make the efficiency of the hydraulic turbine reduce, hydraulic vibration increases, and hydraulic turbine operation is limited, and the safe operation to unit is brought greatly
Harm.
The content of the invention：The purpose of this utility model is to propose a kind of imitative capitate runner runner, and vortex rope is greatly lowered to water
The influence of turbine, improves pressure fluctuation of hydraulic turbine, improves unit operation stability.The technical solution of the utility model is：
A kind of Francis turbine of imitative capitate runner, runner are welded to connect with curved surface bucket 7 by imitative capitate crown 8, are welded on blade 7
Fixed circular lower ring 6, spiral case 1 carry current inlet port, and biserial grid 2 are welded in spiral case, the main shaft connection runner 4 of spiral case 1, snail
Shell 1 connects draft tube 5.
The quantitative range of the blade is at 9-21.
The technical characterstic of the utility model is that front view is seen, crown shape is in " imitative capitate ".With conventional lower ring and some
The curved surface page constitutes an imitative capitate runner runner.The imitative capitate runner, is the crown in conventional Francis turbine
A kind of imitative capitate runner of connection, the blade that this kind of runner can fill up Francis turbine go out to flow low pressure at blade outlet
Position, preferably can lead to draft tube by the vortex in range of operation, reduce amplitude of pressure fluctuation in range of operation and
Noise.As a part for runner, fill up blade and gone out to flow low-pressure area, played the boosting of reverse water pump, effective suppression
Vortex in runner channel processed, improves flow condition, expands the high-efficiency operation area of the hydraulic turbine, reduces hydraulic vibration；At the same time
The hydraulic turbine have it is simple in structure, easy to loading and unloading, processing cost is low, it is applied widely the characteristics of, can meet that unit is efficiently steady
Fixed operation.The utility model reduces amplitude of pressure fluctuation and noise in range of operation.As a part for runner, fill up
Blade goes out to flow low-pressure area, plays the boosting of reverse water pump, and the effective vortex suppressed in runner channel, improves flowing
Situation, expands the high-efficiency operation area of the hydraulic turbine, reduces hydraulic vibration；The hydraulic turbine has simple in structure, handling side at the same time
Just, processing cost is low, it is applied widely the characteristics of, can meet the operation of unit efficient stable.
Brief description of the drawings：
Fig. 1 imitates capitate francis turbine runner installation diagram
Fig. 2 imitates capitate francis turbine runner axial plane schematic diagram
Embodiment：
Fig. 1 is imitative capitate runner runner Francis turbine structure diagram provided by the invention, and runner is by imitative capitate
Hat 8 is welded to connect with curved surface bucket 7, ring 6 under circle is welded and fixed on blade 7, spiral case 1 carries current inlet port, such as Fig. 2 institutes
Show, biserial grid 2 are welded in spiral case, and the main shaft connection runner 4 of spiral case 1, spiral case 1 connects draft tube 5.
The quantitative range of the blade is at 9-21.
During the Francis turbine work of imitative capitate runner, when operating in optimum operating condition, runner bucket outlet circulation is very
It is small, almost without whirlpool area, when operating in sub-load area, rotation vortex rope can be produced, when operating in big flow area, column can be produced
Vortex rope so that energy loss, the amplitude of pressure fluctuation of the outlet of runner increase, and influence unit operation stability, conventional mixed flow
The formula hydraulic turbine is under the working condition, and blade rotary wheel outlet can form the low-pressure area of approximate imitative capitate, when using imitative capitate runner
Afterwards, imitate capitate runner and play boosting drainage, improve the pressure in former low pressure rotation vortex rope region, while preferably by water
Stream is introduced to draft tube, reduces the energy loss of outlet of rotary wheel, while plays preferably drainage elicitation effect, reduces tail
Siphon pressure pulsation amplitude, improves the operation stability of unit.
Claims (2)
1. a kind of Francis turbine of imitative capitate runner, it is characterized in that：Runner is by imitative capitate crown (8) and curved surface bucket (7)
It is welded to connect, ring under circle (6) is welded and fixed on blade (7), spiral case (1) carries current inlet port, and biserial grid (2) are welded on snail
In shell, the main shaft connection runner (4) of spiral case (1), spiral case (1) connection draft tube (5).
2. a kind of Francis turbine of imitative capitate runner according to claim 1, it is characterized in that：The number of the blade
Scope is measured at 9-21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720551549.9U CN207333084U (en) | 2017-05-18 | 2017-05-18 | The Francis turbine of imitative capitate runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720551549.9U CN207333084U (en) | 2017-05-18 | 2017-05-18 | The Francis turbine of imitative capitate runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207333084U true CN207333084U (en) | 2018-05-08 |
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ID=62376328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720551549.9U Active CN207333084U (en) | 2017-05-18 | 2017-05-18 | The Francis turbine of imitative capitate runner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207333084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941602A (en) * | 2022-07-05 | 2022-08-26 | 西安理工大学 | Mixed-flow water turbine capable of controlling generation of blade vortex |
-
2017
- 2017-05-18 CN CN201720551549.9U patent/CN207333084U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941602A (en) * | 2022-07-05 | 2022-08-26 | 西安理工大学 | Mixed-flow water turbine capable of controlling generation of blade vortex |
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