CN103195755B - A kind of single blade screw centrifugal impeller - Google Patents
A kind of single blade screw centrifugal impeller Download PDFInfo
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- CN103195755B CN103195755B CN201310124732.7A CN201310124732A CN103195755B CN 103195755 B CN103195755 B CN 103195755B CN 201310124732 A CN201310124732 A CN 201310124732A CN 103195755 B CN103195755 B CN 103195755B
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Abstract
The invention belongs to hydraulic mechanical equipment technical field, disclose a kind of Novel single-blade screw centrifugal impeller, its major character is that the number of blade is only a slice, and cornerite is between 520 ° ~ 580 °, entrance edge of blade protracts more, and circumferential angle shared by the section of protracting is between 90 ° ~ 150 °; The meridian view of the front shroud streamline of this novel impeller is straightway, and back shroud is that two sections of straight lines and circular arc form, and circular arc is tangent with two straightways respectively.Vane inlet laying angle is 7 ° ~ 18 °, and blade exit laying angle is 10 ° ~ 28 °; Impeller is the back shroud of asymmetric arrangement, and impeller is similar to " bowl " shape viewed from impeller outlet.Impeller of the present invention can not only balance own wt, makes the center of gravity of impeller be positioned on running shaft, also has high efficiency, high pass ability and air horsepower simultaneously within the scope of full flow, changes little feature.Be applicable to blowdown and being salvaging occasion.
Description
Technical field
The invention belongs to hydraulic mechanical equipment technical field, relate to a kind of Novel single-blade screw centrifugal impeller being applicable to blowdown and being salvaging occasion.
Background technique
Traditional single blade screw centrifugal impeller not only efficiency is low and by the impact of individual blade, impeller center of gravity is often difficult to be positioned on running shaft, makes bearing short for working life; In addition, the air horsepower of traditional single blade screw centrifugal impeller changes greatly within the scope of full flow.
Summary of the invention
The change of air horsepower value in a kind of full flow is little in order to obtain for object of the present invention, single blade screw centrifugal impeller of high pass ability and self balancing weight.
Object of the present invention is achieved through the following technical solutions: single blade screw centrifugal impeller, it is characterized in that the number of blade of described impeller is a slice, cornerite is between 520 ° ~ 580 °, and entrance edge of blade protracts, and circumferential angle shared by the section of protracting is between 90 ° ~ 150 °; The meridian view of the front shroud streamline of described impeller is straightway, and back shroud is that two sections of straight lines and circular arc form, and circular arc is tangent with two straightways respectively; Described vane inlet laying angle is 7 ° ~ 18 °, and blade exit laying angle is 10 ° ~ 28 °, and the effective area of passage of blade exit is 1.0 ~ 1.35 with the effective area of passage ratio of import; The a certain shaft section of impeller cut impeller side when there is two place's blade sections, the interior quadrilateral that these two sections and wheel rim, wheel hub surround close to square, and has one circular all tangent with four limits; Described root of blade is rounding, and rounding radii is less than apothem, and the blade section of cross section opposite side thickeies; Described impeller is the back shroud of asymmetric arrangement; Described impeller from type viewed from impeller outlet like " bowl " shape.
Blade design cornerite of the present invention is between 520 ° ~ 580 °, adopt asymmetric back shroud, and the entrance edge of blade that protracts (cornerite that protracts is 90 ° ~ 150 °), and the thickness of bulged blading spiral section inlet side outer rim realizes the self balancing of impeller weight, namely makes the center of gravity of impeller be positioned on running shaft; Above design result can also reduce the disc friction of back shroud and improve the cavitation resistive property of impeller.
Impeller designs for semi-open type, its meridian surface profile is hub side rounding off, and outer edge side designs for straightway, make like this with impeller with the use of the bus that overlaps of village be also straightway, machining error can be effectively reduced, make impeller outer edge and village overlap between gap uniformity, easy to adjust, the efficiency of single blade screw centrifugal impeller can be improved;
The overflow section of impeller adopts close to circular design, effectively improves the wetted perimeter of overflow section, improves impeller adiabatic efficiency and passing capacity.
The design parameter of impeller is chosen as: subtended angle of blade is 520 ° ~ 580 °, vane inlet laying angle is 7 ° ~ 18 °, blade exit laying angle is 10 ° ~ 28 °, and (the little person of specific speed selects little value, the large person of specific speed selects large value), the effective area of passage of blade exit and import effective area of passage ratio are that the little person of 1.0 ~ 1.35(specific speed selects little value, the large person of specific speed selects large value), it is smooth that the selection of these parameters finally also will meet blade overflow section area transition, has the stable feature of good retainer shaft performance number according to single blade screw centrifugal impeller of the method design.
Novel impeller of the present invention not only has high efficiency, nothing blocking, and center of gravity is positioned on running shaft, more achieves full flow internal power value almost constant.
Accompanying drawing explanation
Fig. 1 is the meridian surface profile view of single blade screw centrifugal impeller of the embodiment of the present invention.
Fig. 2 is a certain cross sectional view of the embodiment of the present invention.
Fig. 3, Fig. 4 are the plan views (from impeller inlet end) of embodiment of the present invention graphics.
Fig. 5 is the worm's eye view (from impeller outlet end) of embodiment of the present invention graphics.
Fig. 6 is the plan view (from vertical axis direction) of embodiment of the present invention graphics.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment: as shown in Figure 6, only have a slice impeller, concrete structure is as follows for the present embodiment list blade screw centrifugal impeller:
In Fig. 1, current are upper end incoming flow, impeller inlet diameter is less than impeller outlet diameter, left side is wheel rim Shroud line, and its shape is straight line, because impeller of the present invention adopts semi-open type design, straight line is adopted to substitute traditional Curve Design mode, also make the bus of the lining supporting with impeller be straight line, this compound mode can improve machining accuracy, namely make impeller and village overlap between gap uniformity and controlled; Right side is wheel hub Hub line, and these lines are made up of two sections of straight lines and circular arc line, and circular arc line is between two sections of straight lines, and tangent with two straight lines respectively.And the shape that wheel rim Shroud and wheel hub Hub surrounds should make area of passage from vane inlet to blade exit smooth transition.
In Fig. 2, because single blade screw centrifugal impellers blades cornerite of the present invention is greater than 360 °, different radii place, side on some shaft section, just there will be blade and be truncated twice, the inside quadrilateral that these two truncation surfaces and wheel hub Hub, wheel rim Shroud surround should close to square, made it possible to a circle and four edges substantially all tangent.Meanwhile, the blade of reply impeller carries out chamfered, and chamfer radius should be less than apothem, and makes blade passage transition smooth, and this can improve wetted perimeter, improves impeller adiabatic efficiency.For other side, blade is only truncated once, the center of conducting oneself with dignity for making impeller can be positioned on running shaft, thickening process is carried out to the blade of this side, thickening mode is thicken in blade suction surface side, and thicker at wheel rim side thickness, successively decrease to hub side, the final regional cross section thickeied is acute triangle.
In Fig. 3, shown arrow angle Φ is subtended angle of blade, and 1 in Fig. 4 to protract region for blade, and the blade circumferential angle shared by region that protracts should be 90 ° ~ 150 °, and 2 is thickening vanes region, and thickening mode thickeies according to the method described above.
In Fig. 5, impeller similar " bowl " shape viewed from blade exit, and back shroud is asymmetric arrangement, for reducing cover plate disc friction, cover plate size is as far as possible little, simultaneously in order to balance impeller own wt, from exit edge of blade, back shroud finds round and smooth transition one section to leaf growth, circumferential angle α shared by this section is between 50 ° ~ 150 °, this section of back shroud not only balances impeller own wt, impeller central is made to be positioned on running shaft, also certain guide functions can be played, the fluid of impeller outlet can be entered in next stage flow passage components smoothly.
Claims (1)
1. a single blade screw centrifugal impeller, it is characterized in that the number of blade of described impeller is a slice, cornerite is between 520 ° ~ 580 °, and entrance edge of blade protracts, and circumferential angle shared by the section of protracting is between 90 ° ~ 150 °; The meridian view of the front shroud streamline of described impeller is straightway, and the meridian view of back shroud streamline is that two sections of straight lines and one section of circular arc form, and circular arc is tangent with two straightways respectively; Described vane inlet laying angle is 7 ° ~ 18 °, and blade exit laying angle is 10 ° ~ 28 °, and the effective area of passage of blade exit is 1.0 ~ 1.35 with the effective area of passage ratio of import; The a certain shaft section of impeller cut impeller side when there is two place's blade sections, the interior quadrilateral that these two sections and wheel rim, wheel hub surround close to square, and has one circular all tangent with four limits; Described root of blade is rounding, and rounding radii is less than apothem, and the blade section of cross section opposite side thickeies; Described impeller is the back shroud of asymmetric arrangement; Described impeller is " bowl " shape from type viewed from impeller outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124732.7A CN103195755B (en) | 2013-04-11 | 2013-04-11 | A kind of single blade screw centrifugal impeller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124732.7A CN103195755B (en) | 2013-04-11 | 2013-04-11 | A kind of single blade screw centrifugal impeller |
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| Publication Number | Publication Date |
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| CN103195755A CN103195755A (en) | 2013-07-10 |
| CN103195755B true CN103195755B (en) | 2015-10-07 |
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| CN201310124732.7A Active CN103195755B (en) | 2013-04-11 | 2013-04-11 | A kind of single blade screw centrifugal impeller |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895004A (en) * | 2017-04-05 | 2017-06-27 | 亚太水处理(天长)有限公司 | A kind of non blocking type flexibility blowdown helicoidal pump |
| CN108304606B (en) * | 2017-11-16 | 2021-10-26 | 哈尔滨工程大学 | Impeller with chamfer structure |
Citations (7)
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| EP0874161A1 (en) * | 1997-04-25 | 1998-10-28 | KSB Aktiengesellschaft | Centrifugal pump |
| US6551054B1 (en) * | 1998-12-30 | 2003-04-22 | Sulzer Pumpen Ag | Method and apparatus for pumping a material and a rotor for use in connection therewith |
| CN101793261A (en) * | 2009-11-26 | 2010-08-04 | 江苏国泉泵业制造有限公司 | Design method of single-vane stamping type non-clogging impeller |
| CN201582130U (en) * | 2009-11-24 | 2010-09-15 | 唐多昌 | Swill pump |
| CN102734232A (en) * | 2012-06-29 | 2012-10-17 | 江苏国泉泵业制造有限公司 | Method for eliminating unbalanced force of single-blade pump impeller |
| CN102734209A (en) * | 2012-06-29 | 2012-10-17 | 江苏国泉泵业制造有限公司 | Design method of efficient screw centrifugal pump impeller |
| CN203257731U (en) * | 2013-04-11 | 2013-10-30 | 南京布鲁克林环保设备有限公司 | Novel single-blade spiral centrifugal impeller |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE502004000769D1 (en) * | 2004-04-07 | 2006-07-27 | Frideco Ag | Screw-centrifugal pump |
| JPWO2010007780A1 (en) * | 2008-07-18 | 2012-01-05 | 新明和工業株式会社 | Centrifugal pump impeller and centrifugal pump |
| US8905341B2 (en) * | 2008-07-29 | 2014-12-09 | Vaughan Company, Inc. | Screw-type centrifugal pump with cutting inserts |
-
2013
- 2013-04-11 CN CN201310124732.7A patent/CN103195755B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0874161A1 (en) * | 1997-04-25 | 1998-10-28 | KSB Aktiengesellschaft | Centrifugal pump |
| US6551054B1 (en) * | 1998-12-30 | 2003-04-22 | Sulzer Pumpen Ag | Method and apparatus for pumping a material and a rotor for use in connection therewith |
| CN201582130U (en) * | 2009-11-24 | 2010-09-15 | 唐多昌 | Swill pump |
| CN101793261A (en) * | 2009-11-26 | 2010-08-04 | 江苏国泉泵业制造有限公司 | Design method of single-vane stamping type non-clogging impeller |
| CN102734232A (en) * | 2012-06-29 | 2012-10-17 | 江苏国泉泵业制造有限公司 | Method for eliminating unbalanced force of single-blade pump impeller |
| CN102734209A (en) * | 2012-06-29 | 2012-10-17 | 江苏国泉泵业制造有限公司 | Design method of efficient screw centrifugal pump impeller |
| CN203257731U (en) * | 2013-04-11 | 2013-10-30 | 南京布鲁克林环保设备有限公司 | Novel single-blade spiral centrifugal impeller |
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| CN103195755A (en) | 2013-07-10 |
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