CN105257588B - A kind of non-straightedge vane mixed-flow pump of front and rear cover plate - Google Patents
A kind of non-straightedge vane mixed-flow pump of front and rear cover plate Download PDFInfo
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- CN105257588B CN105257588B CN201510741555.6A CN201510741555A CN105257588B CN 105257588 B CN105257588 B CN 105257588B CN 201510741555 A CN201510741555 A CN 201510741555A CN 105257588 B CN105257588 B CN 105257588B
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Abstract
Patent of the present invention is related to a kind of non-straightedge vane mixed-flow pump of front and rear cover plate, belongs to field of fluid machinery.It is characterized in that：The vane thickness of entrance edge of blade to exit edge of blade is non-uniform thickness distribution, and certain linear rule change is presented.The runner bucket passes through the adjustment to front and rear cover plate thickness, improve the acting ability of fluid flow structure and impeller in impeller channel, blade loading is set to be evenly distributed, weaken the vortices breakdown around blade, lift energy conversion efficiency, the hydraulic loss of mixed-flow pump is reduced, the purpose for improving mixed-flow pump impeller performance is reached.
Description
Technical field
Patent of the present invention is related to a kind of non-straightedge vane mixed-flow pump of front and rear cover plate, belongs to field of fluid machinery.
Background technology
Mixed-flow pump plays important role as a kind of universal fluid machinery in the every field of national economy, especially
It is widely used in core main pump field, but also consumes substantial amounts of electric power simultaneously, therefore improves the efficiency of mixed-flow pump to novel saving
Type social construction is significant.Impeller is to influence the main flow passage components of the mixed flow efficiency of pump, and mixed-flow impeller is in structure
And in performance between receded disk impeller and aial flow impeller, it largely determines the performance and knot of mixed-flow pump
Structure, mixed flow pump blade is in obvious spatial warping shape, and the complex geometric parameter of design is more cumbersome, and control difficulty is big, therefore
The design of high-efficiency mixed flow impeller of pump is to improve the key of the whole efficiency of pump.
From mixed-flow pump internal flow rule：The flowing of fluid winding flow runner bucket is extremely complex, nearly blade protecgulum
Plate and the flow velocity in back shroud area are differed substantially with blade loading, and significant difference is also presented in Vorticity Distribution, are formd non-equal
Uniform flow is moved.The fluidal texture is unfavorable for acting and energy conversion of the blade to fluid, larger hydraulic loss is caused, so as to influence
The efficiency of mixed-flow pump.The mixed-flow impeller of traditional design, from front shroud, cover plate direction is uniform thickness to its vane thickness backward, is not had
There is an influence in view of its thickness change fluid flow, therefore different blade profiles is done work ability to the mixed flow efficiency of pump and blade
Influence is very important.Vane thickness reasonable in design can significantly increase the hydraulic efficiency of mixed-flow impeller, and then improve whole
The efficiency of pump.
Currently for how to improve mixed-flow pump impeller efficiency, overwhelming majority research all concentrates on the geometry for exploring different impellers
Influence of the parameter to pump performance, although also have the correlative study to vane thickness, but be the failure to pay attention to blade front and rear cover plate thickness
Different Change of leaf form rules are presented in influence of the changing rule to performance, the section from the front shroud of blade to back shroud, different
Blade shape directly influence the performance and blade loading distribution situation of impeller.Patent of the present invention is by controlling blade from protecgulum
Plate adjusts the flow field structure around the acting ability of blade, uniform blade, so as to reduce leaf to the thickness change rule of back shroud
The overall hydraulic loss of wheel, reaches the purpose of lifting mixed-flow pump performance.Therefore, thickness of the runner bucket from front shroud to back shroud
Changing rule is spent, there is important practical significance and social value to the performance for improving mixed-flow pump.
The content of the invention
For the efficient utilization of the performance, operation stability and the energy that further improve mixed-flow pump, patent of the present invention from
The basic research angle of blade acting ability is set out, and proposes a kind of non-straightedge vane mixed-flow impeller of front and rear cover plate, the impeller
Blade shape it is rational in infrastructure, simple, it is easy implement, effectively improve the whirlpool distribution situation of blade surface, make blade does function
Power is more uniform.
Patent of the present invention proposes a kind of non-straightedge vane mixed-flow pump of front and rear cover plate, including blade, it is characterised in that：Blade enters
Mouth side is that non-uniform thickness is distributed to the thickness of exit edge of blade；Change from blade front shroud to the vane thickness of blade back shroud and advise
Rule follows y=b-ax function expression, and coefficient a value is；The change of vane thickness existsBetween, wherein
The thickness for being blade at back shroud,The thickness for being blade at front shroud；WithValue meet blade strength will
Ask, be conventional technical means；For the width of diverse location blade, its span is determined by different blade dimensions；b
= , whereinThe thickness for being blade at back shroud；Wherein dependent variable y is vane thickness, and independent variable x is the different positions of blade
Put the distance away from blade back shroud.
The advantage of patent of the present invention is：From blade acting ability and flowing control angle, by changing blade in the past
Cover plate adjusts the flow field structure around blade to the thickness of back shroud, and uniform blade reduces fluid to the acting ability of fluid
Energy loss in flow process, improves the performance of mixed-flow pump impeller, while the present invention also has rational in infrastructure, processing and implementation
The advantages of simple and convenient.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the shaft section perspective view for the mixed-flow impeller that patent of the present invention is proposed.
Fig. 2 is the shaft section perspective view for the mixed-flow impeller blade profile that patent of the present invention is proposed.
Fig. 3 is the mixed-flow impeller that patent of the present invention is proposed, perspective view of the blade from front shroud to back shroud.
Fig. 4 is the mixed-flow impeller blade profile and cartesian coordinate system schematic diagram that patent of the present invention is proposed.
Fig. 5 is that the mixed-flow impeller that patent of the present invention is proposed is compared figure with the hydraulic efficiency of common uniform thickness mixed-flow impeller.
Embodiment
This patent is with specific speed nsExemplified by=390 mixed-flow pump.
Fig. 1 gives a kind of shaft section projection for the non-straightedge vane mixed-flow impeller of front and rear cover plate that patent of the present invention is proposed
Schematic diagram.1 is exit edge of blade in figure, and 2 be entrance edge of blade, and 3 be the front shroud of blade, and 4 be the back shroud of blade, and 5 be leaf
Piece working face, 6 be the back side of blade；As seen from the figure：The mixed-flow impeller blade from front shroud to back shroud be non-uniform thickness, and
And certain changing rule is presented；Thickness at the mixed-flow impeller blade back shroudFor 3mm, thickness at blade front shroudFor
1.1mm,Span be：84mm-134mm, i.e. most narrow width of blade are 84mm, and most wide width of blade is 134mm.
Fig. 2 gives a kind of axle for the non-straightedge vane mixed-flow impeller blade profile of front and rear cover plate that patent of the present invention is proposed
Section perspective view, as seen from the figure：From vane inlet to outlet, 5 section As, B, C, D, E are symbolically intercepted, leaf is carried out
The analysis of piece thickness rule.
Fig. 3 gives the non-straightedge vane mixed-flow impeller blade of a kind of front and rear cover plate that patent of the present invention is proposed, from protecgulum
Plate illustrates the relative position in 5 sections in figure to the perspective view of back shroud.
Fig. 4 gives a kind of flute for the non-straightedge vane mixed-flow impeller blade profile of front and rear cover plate that patent of the present invention is proposed
Karr coordinate system schematic diagram, as seen from the figure：The different cross section of blade, from blade front shroud to back shroud thickness change, it then follows no
With linear function y=b-ax variation relations, wherein a is, b is；In this example,Difference value：92.6mm、
100.8mm、109mm、117.6mm、125.8mm。
Fig. 5 is that the mixed-flow impeller that patent of the present invention is proposed is compared figure with the hydraulic efficiency of common uniform thickness mixed-flow impeller,
As seen from the figure：Calculating analysis by CFD can obtain, and the hydraulic efficiency of the non-straightedge vane mixed-flow impeller of front and rear cover plate is except smaller
Flow（0.9Qd）In the case of, scheme of its hydraulic efficiency apparently higher than straightedge vane.
Claims (1)
1. a kind of non-straightedge vane mixed-flow pump of front and rear cover plate, including blade, it is characterised in that：Entrance edge of blade is to exit edge of blade
Vane thickness be the distribution of non-uniform thickness, and certain linear rule change is presented, from blade front shroud to blade back shroud
Vane thickness changing rule follow y=b-ax function expression, coefficient a value isThe change of vane thickness exists
δ1-δ2Between, wherein δ2The thickness for being blade at back shroud, δ1The thickness for being blade at front shroud；L is diverse location leaf
The width of piece, its span is determined by different blade dimensions；B=δ2；Wherein dependent variable y is vane thickness, and independent variable x is
Distance of the blade diverse location away from blade back shroud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741555.6A CN105257588B (en) | 2015-11-05 | 2015-11-05 | A kind of non-straightedge vane mixed-flow pump of front and rear cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741555.6A CN105257588B (en) | 2015-11-05 | 2015-11-05 | A kind of non-straightedge vane mixed-flow pump of front and rear cover plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105257588A CN105257588A (en) | 2016-01-20 |
| CN105257588B true CN105257588B (en) | 2017-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510741555.6A Active CN105257588B (en) | 2015-11-05 | 2015-11-05 | A kind of non-straightedge vane mixed-flow pump of front and rear cover plate |
Country Status (1)
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| CN (1) | CN105257588B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109511567B (en) * | 2019-01-02 | 2020-12-15 | 连云港市农业科学院 | Automatic control pig raising and feeding device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004007970A1 (en) * | 2002-07-12 | 2004-01-22 | Ebara Corporation | Inducer, and inducer-equipped pump |
| CN201461463U (en) * | 2009-06-19 | 2010-05-12 | 鞍钢股份有限公司 | Novel fan |
| CN103256251A (en) * | 2012-02-20 | 2013-08-21 | 张胜利 | Variable-curvature arc equal-thickness plate wing section for fan group |
| CN103104546A (en) * | 2013-03-06 | 2013-05-15 | 江苏大学 | Design method of nuclear main pump impeller |
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| CN105257588A (en) | 2016-01-20 |
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