CN202520635U - Efficient wind-power centrifugal pump impeller - Google Patents
Efficient wind-power centrifugal pump impeller Download PDFInfo
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- CN202520635U CN202520635U CN2012200838886U CN201220083888U CN202520635U CN 202520635 U CN202520635 U CN 202520635U CN 2012200838886 U CN2012200838886 U CN 2012200838886U CN 201220083888 U CN201220083888 U CN 201220083888U CN 202520635 U CN202520635 U CN 202520635U
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- linear leaf
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Abstract
本实用新型一种高效风能离心泵叶轮，属于风能提水系统中的离心泵主要部件。其特征在于突破传统叶片设计理论，长叶片进口部分形状按照包角变换法设计，叶片出口边反向扭曲设计，使叶片出口安放角β 2为90度。在长叶片中按照一定的偏置比例、进口直径、出口边位置增加短叶片，短叶片出口边反向扭曲设计。本实用新型设计的叶轮，不仅有效地阻止了小流量工况下低比转数风能离心泵涡流及脱流的产生和发展，改善了叶轮流道内液流扩散程度及叶轮出口处的流速分布，还提高了风能离心泵的扬程及效率。主要适用于低比转数离心泵。
The utility model relates to an impeller of a high-efficiency wind energy centrifugal pump, which belongs to the main part of the centrifugal pump in the wind energy water lifting system. It is characterized in that it breaks through the traditional blade design theory, the shape of the inlet part of the long blade is designed according to the wrap angle transformation method, and the blade outlet side is reversely twisted so that the blade outlet placement angle β2 is 90 degrees. Add short blades to the long blades according to a certain offset ratio, inlet diameter, and outlet edge position, and the outlet edge of the short blades is reversely twisted. The impeller designed by the utility model not only effectively prevents the generation and development of the vortex and shedding of the low specific speed wind energy centrifugal pump under the small flow rate condition, but also improves the degree of liquid flow diffusion in the impeller channel and the flow velocity distribution at the outlet of the impeller. The lift and efficiency of the wind energy centrifugal pump are also improved. Mainly suitable for low specific speed centrifugal pumps.
Description
Technical field
The utility model relates to the centrifugal pump critical component in the windmill water pumping system, refers in particular to a kind of efficient wind energy centrifugal pump impeller.
Background technique
The wind energy centrifugal pump system is along with the reaching its maturity of wind generating technology, a kind of green novel energy source utilization technology that fast development is got up.Because during the work of wind energy centrifugal pump, its operating conditions is constantly to change, and the conventional centrifugal pump design has only an optimal working point; When itself and wind power system mate when relatively poor; Wind energy centrifugal pump long-play is prone to when causing high speed cavitate under off-design behaviour, and low flow rate condition is prone to produce instabilities such as the separation of flow, backflow and secondary flow down and flows; Thereby produce flow-induced vibration and noise, cause unit to destroy and environmental pollution.Therefore, this wind energy centrifugal pump that just requires us to design can adapt to the operating conditions under the multi-operating mode, has higher lift, especially can be stable under low flow rate condition and efficient is higher.
By retrieval; The relevant at present patent of declaring has utility model patent " biasing of low specific speed centrifugal pump impeller short blade " (application number: 90214371.9); Proposed short blade offset is reached the biasing ratio in linear leaf; But this patented technology does not provide short blade and imports and exports suitable angle of eccentricity and direction, does not change the design of blade exit, can not guarantee that low specific speed centrifugal pump energy under low flow rate condition is stable and have more high-lift.
Summary of the invention
The purpose of the utility model is deficiency and the relatively poor problem of wind energy centrifugal pump matching performance to existing technology; A kind of efficient wind energy centrifugal pump impeller is provided; Improve low specific speed centrifugal pump inner unstable destruction and environmental pollution of flowing and causing under low flow rate condition, improve the efficient under the low flow rate condition to unit.
The technological scheme of the utility model is: mainly be made up of blade and wheel hub, the front is provided with front shroud of impeller, and the back is provided with back shroud of impeller, and blade is the radial radiation shape, it is characterized in that blade is made up of linear leaf import laying angle long and short blade
β 1Get 16～22 degree, linear leaf outlet limit is designed to the reverse twist shape, the blade exit laying angle
β 2Be 90 degree; Short blade is arranged between the linear leaf, the short blade inlet diameter
D 1＇ is the linear leaf inlet diameter
D 1, the blade exit diameter
D 20.4～0.6 times of sum, short blade import laying angle and linear leaf import laying angle
β 1Identical, the circumferential position deflection linear leaf back side of inlet, the biasing ratio is in 0.6～1 scope, and short blade outlet limit is positioned over the neutral position of two linear leafs as far as possible, and short blade outlet limit is designed to the reverse twist shape, and is the same with linear leaf.
The utility model changes the conventional vane design method, and blade exit is designed to the reverse twist shape, increases blade outlet angle
β 2, and in linear leaf, increase the short blade of appropriate intervals and length.
(1) linear leaf inlet part shape is according to the design of cornerite converter technique, blade import laying angle
β 1Get 16～22 degree; The design of exit edge of blade reverse twist makes the blade exit laying angle
β 2Be 90 degree.
The linear leaf inlet part, blade angle
βAlong with cornerite
φLinear the increasing of increase, relation below satisfying:
β=β 1+（
β 2＇-
β 1）
φ/
θ＇
In the formula:
βOn-the blade do apart from the inlet side cornerite
φThe time blade angle, the degree;
β 1-blade import laying angle, degree;
θSubtended angle of blade under ＇-traditional design, degree;
β 2Blade exit laying angle under ＇-traditional design, degree.
Exit edge of blade reverse twist design: get the reverse twist basic circle concentric, its diameter with impeller
D 3Be the blade exit diameter
D 20.8～0.9 times; Impeller linear leaf and basic circle according to the design of cornerite converter technique intersect at a point; Reverse extending behind this point and the axial connecting line intersects with the blade exit circle, does and impeller linear leaf and the tangent camber line of axial connecting line elongation line by arc method; Obtain blade exit reverse twist part, and make the blade exit laying angle
β 2Be 90 degree.
Designing suitable blade import laying angle can prevent the obstruction between inlet's adjacent blades and reduce hydraulic loss; Bigger outlet laying angle can improve the centrifugal lift of pump of wind energy; The exit edge of blade reverse twist of the utility model design improves than the composite impeller lift of conventional method design; Than other outlet limits is that the straight-vaned impeller design of 90 degree more meets the impeller internal flow state, has reduced impact loss and linear loss.
(2) in linear leaf, increase short blade, the short blade inlet diameter
D 1＇ is the linear leaf inlet diameter
D 1, the blade exit diameter
D 20.4～0.6 times of sum; Short blade import laying angle and linear leaf import laying angle
β 1Identical, the circumferential position deflection linear leaf back side of inlet, the biasing ratio is in 0.6～1 scope, and the short blade inlet diameter
D 1＇ is more little, and offset or dish is just more little, and limit case is exactly that the linear leaf number doubles; And short blade outlet limit is positioned over the neutral position of two linear leafs as far as possible.The reverse twist design of short blade outlet limit, the same with linear leaf.According to impeller internal flow state situation and actual demand, can be as stated above in impeller channel, increase more how long lack differ, suitable short blade at interval.
Because phorogenesis; Bigger near the flow stream velocity of vacuum side of blade in the impeller channel, the utility model equates to be target that short blade is setovered to the linear leaf back side according to the flow in the runner; Select suitable short blade inlet diameter; Simultaneously, be positioned over the middle part of two linear leafs to short blade outlet limit, short blade to the deflection of wheel rotation direction several angle.Like this, not only can better stop the secondary flow that forms by centrifugal force and coriolis force, dwindle even eliminate the wake zone, and can make the velocity flow profile at impeller outlet place more even.
The advantage of the utility model is: the impeller of the utility model design; Because of increasing short blade and squinting to the linear leaf back side; Be positioned over short blade outlet limit at the middle part of two linear leafs; Stop the generation and the development of low specific speed wind energy centrifugal pump eddy current and the separation of flow under the low flow rate condition effectively, improved the velocity flow profile of flow diffusion and impeller outlet place in the impeller channel preferably; The design of exit edge of blade reverse twist has effectively improved centrifugal lift of pump of wind energy and efficient.The utility model is applicable to other low specific speed centrifugal pumps.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is an embodiment's of the utility model an impeller axial plane sectional view.
Fig. 2 is same embodiment's an impeller blade schematic representation (seeing towards back shroud of impeller from front shroud of impeller after throwing off front shroud of impeller).
Among the figure, 1. front shroud of impeller, 2. back shroud of impeller, 3. wheel hub, 4. linear leaf inlet diameter
D 1, 5. short blade inlet diameter
D 1＇, 6. reverse twist basic circle diameter
D 3, 7. blade exit diameter
D 2, 8. linear leaf working surface, the 9. linear leaf back side, 10. linear leaf, 11. blade exit laying angles
β 2, 12. blade import laying angles
β 1, 13. short blades, 14. linear leaf cornerites.
Embodiment
Fig. 1 and Fig. 2 have confirmed this embodiment's impeller shape jointly.Impeller is made up of blade and wheel hub (3), has front shroud of impeller (1) and back shroud of impeller (2), is a kind of double shrouded wheel.Blade is made up of linear leaf (10), short blade (13), and linear leaf (10) has 4, and bigger convex surface is linear leaf working surface (8), and big concave surface is the linear leaf back side (9), and short blade (13) also has 4.Present embodiment designs linear leaf (10) inlet part according to the cornerite converter technique, blade import laying angle
β 1(12) get 16～22 degree, blade angle
βAlong with cornerite
φLinear the increasing of increase, relation below satisfying:
β=β 1+（
β 2＇-
β 1）
φ/
θ＇
Carry out the reverse twist design of linear leaf (10) outlet limit then, get the reverse twist basic circle diameter concentric with impeller
D 3(6) be the blade exit diameter
D 2(7) 0.8～0.9 times; Impeller linear leaf (10) according to the design of cornerite converter technique intersects at the B point with basic circle; Reverse extending behind B point and the axial connecting line intersects at the A point with the blade exit circle, does and impeller linear leaf (10) and the tangent camber line AC of AB line by arc method; Obtain blade exit reverse twist part, and make the blade exit laying angle
β 2(11) be 90 degree.
In linear leaf (10), increase short blade (13), short blade inlet diameter
D 1＇ (5) is the linear leaf inlet diameter
D 1(4), blade exit diameter
D 2(7) 0.4～0.6 of sum times; Short blade import laying angle and linear leaf import laying angle
β 1(12) identical, the circumferential position deflection linear leaf back side (9) of inlet, the biasing ratio is in 0.6～1 scope, the short blade inlet diameter
D 1＇ (5) is more little, and offset or dish is just more little, and limit case is exactly that linear leaf (10) quantity doubles; And short blade (13) outlet limit is positioned over the neutral position of two linear leafs (10) as far as possible.The reverse twist design of short blade outlet limit, the same with linear leaf.
According to impeller internal flow state situation and actual demand, can be as stated above in impeller channel, increase more how long lack differ, suitable short blade at interval.
Such design can effectively stop the generation and the development of low specific-speed wind energy centrifugal pump eddy current and the separation of flow under the low flow rate condition, makes the velocity flow profile at impeller outlet place more even, when improving head coefficient, reduces the outlet impact loss as far as possible.
Claims (3)
1. an efficient wind energy centrifugal pump impeller is made up of blade and wheel hub, and the front is provided with front shroud of impeller, and the back is provided with back shroud of impeller, and blade is the radial radiation shape, it is characterized in that, blade is made up of long and short blade separation, linear leaf import laying angle
β 1Get 16～22 degree, linear leaf outlet limit is the reverse twist shape, the blade exit laying angle
β 2Be 90 degree; The short blade inlet diameter
D 1＇ is the linear leaf inlet diameter
D 1, the blade exit diameter
D 20.4～0.6 times of sum, short blade import laying angle and linear leaf import laying angle
β 1Identical, the circumferential locations deflection linear leaf back side of short blade inlet, the biasing ratio is in 0.6～1 scope, and short blade outlet limit is positioned over the neutral position of two linear leafs, and short blade outlet limit is the same with linear leaf to be the reverse twist shape.
2. a kind of efficient wind energy centrifugal pump impeller as claimed in claim 1 is characterized in that, said linear leaf inlet part, blade angle
βAlong with cornerite
φLinear the increasing of increase, relation below satisfying:
β=β 1+（
β 2＇-
β 1）
φ/
θ＇
In the formula:
βOn-the blade do apart from the inlet side cornerite
φThe time blade angle, the degree;
β 1-blade import laying angle, degree;
θSubtended angle of blade under ＇-traditional design, degree;
β 2Blade exit laying angle under ＇-traditional design, degree;
Exit edge of blade reverse twist design: get the reverse twist basic circle concentric, its diameter with impeller
D 3Be the blade exit diameter
D 20.8～0.9 times; Impeller linear leaf and basic circle according to the design of cornerite converter technique intersect at a point; Reverse extending behind this point and the axial connecting line intersects with the blade exit circle, does and impeller linear leaf and the tangent camber line of axial connecting line elongation line by arc method; Obtain blade exit reverse twist part, and make the blade exit laying angle
β 2Be 90 degree.
3. a kind of efficient wind energy centrifugal pump impeller as claimed in claim 2 is characterized in that, in impeller channel, increases short blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200838886U CN202520635U (en) | 2012-03-08 | 2012-03-08 | Efficient wind-power centrifugal pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200838886U CN202520635U (en) | 2012-03-08 | 2012-03-08 | Efficient wind-power centrifugal pump impeller |
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| Publication Number | Publication Date |
|---|---|
| CN202520635U true CN202520635U (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200838886U Expired - Fee Related CN202520635U (en) | 2012-03-08 | 2012-03-08 | Efficient wind-power centrifugal pump impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116451364A (en) * | 2023-03-17 | 2023-07-18 | 西华大学 | Design method of hydraulic turbine impeller splitter blade |
-
2012
- 2012-03-08 CN CN2012200838886U patent/CN202520635U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116451364A (en) * | 2023-03-17 | 2023-07-18 | 西华大学 | Design method of hydraulic turbine impeller splitter blade |
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| 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: 20121107 Termination date: 20130308 |