CN103573693A - Low-specific-speed centrifugal pump impeller - Google Patents
Low-specific-speed centrifugal pump impeller Download PDFInfo
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- CN103573693A CN103573693A CN201310558596.2A CN201310558596A CN103573693A CN 103573693 A CN103573693 A CN 103573693A CN 201310558596 A CN201310558596 A CN 201310558596A CN 103573693 A CN103573693 A CN 103573693A
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- centrifugal pump
- wheel disc
- speed centrifugal
- short blade
- leaf
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Abstract
The invention discloses a low-specific-speed centrifugal pump impeller. The low-specific-speed centrifugal pump impeller comprises an impeller disc which is rotationally arranged on a pump shaft. Three long blades which are rotationally symmetrical are arranged on the impeller disc. Short blades are arranged in blade grooves between every two adjacent long blades. The long blades and the short blades radiate in the radial direction along the impeller disc. The outlet placement angle of the short blades ranges from 40 degrees to 44 degrees. The ratio of the inlet diameter of the short blades to the outer diameter of the impeller disc ranges from 0.4 to 0.6. According to the low-specific-speed centrifugal pump impeller, the outlet placement angle of the short blades ranges from 40 degrees to 44 degrees, the ratio of the inlet diameter of the short blades to the outer diameter of the impeller disc ranges from 0.4 to 0.6, the lift and efficiency of a centrifugal pump can be best, and efficiency of the centrifugal pump is improved.
Description
Technical field
The present invention relates to a kind of centrifugal pump, specifically refer to Low Specific Speed Centrifugal Pump Impellers.
Background technique
Centrifugal pump is generally driven by motor, before starting pump, in the pump housing and suction line, is full of liquid.When impeller High Rotation Speed, impeller drives the rotation together of interlobate liquid, and due to the effect of centrifugal force, liquid is thrown toward impeller outer edge (flow velocity can increase to 15～25m/s) from impeller center, and kinetic energy also increases thereupon.When liquid enters after pump case, because the runner in volute shaped pump casing expands gradually, flow rate of liquid reduces gradually, and a part of kinetic energy changes static energy into, so liquid flows out along exhaust port with higher pressure; Meanwhile, impeller center forms certain vacuum because liquid is thrown out of, and the pressure Pa at liquid level place is higher than impeller center, and therefore, the liquid of suction line enters in pump under differential pressure action.Impeller does not stop rotation, and liquid is also continuously inhaled into and extrudes, and because why centrifugal pump can carry liquid, mainly leans on the effect of centrifugal force, therefore be called centrifugal pump.
Low specific-speed centrifugal pump generally refers to the centrifugal pump that revolution is less than 80, and because the flow of low specific speed centrifugal pump is less, and lift is high, thereby makes its runner narrow and grow, and cause the frictional loss of wheel disc large, so the efficiency of centrifugal pump is low.
Summary of the invention
The object of the present invention is to provide Low Specific Speed Centrifugal Pump Impellers, reduce the wearing and tearing of wheel disc, and then improve the efficiency of centrifugal pump.
Object of the present invention is achieved through the following technical solutions:
Low Specific Speed Centrifugal Pump Impellers, comprise wheel disc, described wheel disc rotates and is arranged on pump shaft, described wheel disc is provided with rotational symmetric 3 linear leafs, in leaf groove between two adjacent linear leafs, be provided with short blade, described linear leaf and short blade are along wheel disc radial radiation, and described short blade outlet laying angle is 40 ° ~ 44 °, and the inlet diameter of short blade is 0.4 ~ 0.6 with the ratio of wheel disc external diameter.The present invention not only considers to reduce the friction with blade surface of squeezing of blade, the runner that also will consider wheel disc upper blade has enough length, to guarantee the stability of flow of fluid and the abundant effect of blade convection cell, therefore adopt 3 linear leafs, in leaf groove between adjacent linear leaf, short blade is set, can wash away wake flow, more effectively prevent generation and the development of wake flow, improved the correction factor of blade, and then increase centrifugal lift of pump, improved velocity flow profile, improved centrifugal pump performance, wherein short blade outlet laying angle is within the scope of 40 ° ~ 44 °, the inlet diameter of short blade is 0.4 ~ 0.6 with the ratio of wheel disc external diameter, can make centrifugal lift of pump and efficiency reach best level, reached the object that improves efficiency of centrifugal pump.
On described wheel disc, also have equalizing orifice.The equalizing orifice having on wheel disc can make the pressure balance before and after wheel disc, keeps slow-roll stabilization, reduces vibration, guarantees the working efficiency of centrifugal pump.
Between described adjacent linear leaf, the ratio of runner exit and inlet-duct area is 1 ~ 1.2, can reduce the divergence loss of fluid, if this ratio is greater than 1. 2, runner diffusion is serious, and the functioning efficiency of impeller convection cell declines.
Described linear leaf outlet laying angle is 35 ° ~ 40 °.Mostly the angle of the outlet laying angle of general blade is lower than 90 °, low speed than centrifugal pump in, for reducing the wearing and tearing of pump, often select larger outlet laying angle, but outlet laying angle is larger, and interlobate runner is more crooked, and runner can shorten, cause the angle of flare between adjacent blades to become large, cause hydraulic loss to increase; Linear leaf outlet laying angle is set to 35 ° ~ 40 °, can guarantee the runner of larger width, reduces the loss of waterpower.
Leaf groove inlet part between described leaf lengthy motion picture and short blade is smooth plane.The inlet part of smooth flat can be accelerated the speed of fluid, can further reduce water conservancy loss, improves the anti-cavitation performance of centrifugal pump itself.
The present invention compared with prior art, has following advantage and beneficial effect:
1, Low Specific Speed Centrifugal Pump Impellers of the present invention, comprise wheel disc, described wheel disc rotates and is arranged on pump shaft, described wheel disc is provided with rotational symmetric 3 linear leafs, in leaf groove between two adjacent linear leafs, be provided with short blade, described linear leaf and short blade are along wheel disc radial radiation, and described short blade outlet laying angle is 40 ° ~ 44 °, and the inlet diameter of short blade is 0.4 ~ 0.6 with the ratio of wheel disc external diameter; Wherein short blade outlet laying angle is within the scope of 40 ° ~ 44 °, and the inlet diameter of short blade is 0.4 ~ 0.6 with the ratio of wheel disc external diameter, can make centrifugal lift of pump and efficiency reach best level, has reached the object that improves efficiency of centrifugal pump;
2, Low Specific Speed Centrifugal Pump Impellers of the present invention, between adjacent linear leaf, the ratio of runner exit and inlet-duct area is 1 ~ 1.2, can reduce the divergence loss of fluid, if this ratio is greater than 1. 2, runner diffusion is serious, the functioning efficiency of impeller convection cell declines;
3, Low Specific Speed Centrifugal Pump Impellers of the present invention, linear leaf outlet laying angle is 35 ° ~ 40 °, mostly the angle of the outlet laying angle of general blade is lower than 90 °, low speed than centrifugal pump in, linear leaf outlet laying angle is set to 35 ° ~ 40 °, can guarantee the runner of larger width, reduce the loss of waterpower.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms the application's a part, does not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is structural representation of the present invention;
Mark and corresponding component title in accompanying drawing:
1-wheel disc, 2-short blade, 3-linear leaf, 4-linear leaf outlet laying angle, 5-short blade outlet laying angle, 6-pump shaft, 7-equalizing orifice.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment
As shown in Figure 1, Low Specific Speed Centrifugal Pump Impellers of the present invention, comprise wheel disc 1, described wheel disc 1 rotates and is arranged on pump shaft 2, described wheel disc 1 is provided with rotational symmetric 3 linear leafs 3, in the leaf groove between two adjacent linear leafs 3, is provided with short blade 2, and described linear leaf 3 and short blade 2 are along wheel disc 1 radial radiation, described short blade outlet laying angle 5 is 40 ° ~ 44 °, and the inlet diameter of short blade 2 is 0.4 ~ 0.6 with the ratio of wheel disc 1 external diameter; The ratio of 3 runner exits of described adjacent linear leaf and inlet-duct area is 1 ~ 1.2, and described linear leaf outlet laying angle 4 is 35 ° ~ 40 °.
The ratio of 3 runner exits of adjacent linear leaf of the present invention and inlet-duct area is 1 ~ 1.2 can reduce the divergence loss of fluid, if this ratio is greater than 1. 2, runner diffusion is serious, and the functioning efficiency of impeller convection cell declines, the present invention not only considers to reduce the friction with blade surface of squeezing of blade, the runner that also will consider wheel disc 1 upper blade has enough length, to guarantee the stability of flow of fluid and the abundant effect of blade convection cell, therefore adopt 3 linear leafs 3, in leaf groove between adjacent linear leaf 3, short blade 2 is set, can wash away wake flow, more effectively prevent generation and the development of wake flow, improved the correction factor of blade, and then increase centrifugal lift of pump, improved velocity flow profile, improved centrifugal pump performance, mostly the angle of the outlet laying angle of general blade is lower than 90 °, low speed than centrifugal pump in, for reducing the wearing and tearing of pump, often select larger outlet laying angle, but outlet laying angle is larger, interlobate runner is more crooked, runner can shorten, cause the angle of flare between adjacent blades to become large, cause hydraulic loss to increase, linear leaf outlet laying angle 4 is set to 35 ° ~ 40 °, can guarantee the runner of larger width, reduces the loss of waterpower, short blade outlet laying angle 5 is within the scope of 40 ° ~ 44 °, and the inlet diameter of short blade 2 is 0.4 ~ 0.6 with the ratio of wheel disc 1 external diameter, can make centrifugal lift of pump and efficiency reach best level, has reached the object that improves efficiency of centrifugal pump.
Above-described embodiment; object of the present invention, technological scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. Low Specific Speed Centrifugal Pump Impellers, comprise wheel disc (1), described wheel disc (1) rotates and is arranged on pump shaft (6), it is characterized in that: described wheel disc (1) is provided with rotational symmetric 3 linear leafs (3), in leaf groove between adjacent two linear leafs (3), be provided with short blade (2), described linear leaf (3) and short blade (2) are along wheel disc (1) radial radiation, described short blade outlet laying angle (4) is 40 ° ~ 44 °, and the ratio of the inlet diameter of short blade (2) and wheel disc (1) external diameter is 0.4 ~ 0.6.
2. Low Specific Speed Centrifugal Pump Impellers according to claim 1, is characterized in that: on described wheel disc (1), also have equalizing orifice (7).
3. Low Specific Speed Centrifugal Pump Impellers according to claim 1, is characterized in that: between described adjacent linear leaf (3), the ratio of runner exit and inlet-duct area is 1 ~ 1.2.
4. Low Specific Speed Centrifugal Pump Impellers according to claim 3, is characterized in that: described linear leaf outlet laying angle (5) is 35 ° ~ 40 °.
5. Low Specific Speed Centrifugal Pump Impellers according to claim 1, is characterized in that: the leaf groove inlet part between described leaf lengthy motion picture (3) and short blade (2) is smooth plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310558596.2A CN103573693A (en) | 2013-11-12 | 2013-11-12 | Low-specific-speed centrifugal pump impeller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310558596.2A CN103573693A (en) | 2013-11-12 | 2013-11-12 | Low-specific-speed centrifugal pump impeller |
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| CN103573693A true CN103573693A (en) | 2014-02-12 |
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| CN201310558596.2A Pending CN103573693A (en) | 2013-11-12 | 2013-11-12 | Low-specific-speed centrifugal pump impeller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835988A (en) * | 2014-03-11 | 2014-06-04 | 门立山 | Centrifugal pump impeller |
| CN104405678A (en) * | 2014-10-14 | 2015-03-11 | 江苏大学 | Centrifugal impeller with vaneless flow-splitting sheets |
| CN106762806A (en) * | 2017-02-16 | 2017-05-31 | 江苏大学 | A kind of centrifugal pump impeller with straightener(stator) blade |
| CN107725392A (en) * | 2016-08-11 | 2018-02-23 | 浙江三花汽车零部件有限公司 | Electronic pump |
Citations (5)
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| JPS58144695A (en) * | 1982-01-29 | 1983-08-29 | Yoshio Sato | Special fluid pump |
| CN2160781Y (en) * | 1993-04-02 | 1994-04-06 | 广州市增城华江机电制品有限公司 | Impeller for solid-liquid pump |
| CN101865157A (en) * | 2010-06-11 | 2010-10-20 | 中国兵器工业集团第七O研究所 | Centrifugal water pump |
| CN102562651A (en) * | 2012-03-08 | 2012-07-11 | 江苏大学 | High-efficiency wind-powered centrifugal pump impeller |
| CN103352868A (en) * | 2013-07-12 | 2013-10-16 | 武汉大学 | Centrifugal pump impeller hydraulic design method and designed centrifugal pump impeller |
-
2013
- 2013-11-12 CN CN201310558596.2A patent/CN103573693A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58144695A (en) * | 1982-01-29 | 1983-08-29 | Yoshio Sato | Special fluid pump |
| CN2160781Y (en) * | 1993-04-02 | 1994-04-06 | 广州市增城华江机电制品有限公司 | Impeller for solid-liquid pump |
| CN101865157A (en) * | 2010-06-11 | 2010-10-20 | 中国兵器工业集团第七O研究所 | Centrifugal water pump |
| CN102562651A (en) * | 2012-03-08 | 2012-07-11 | 江苏大学 | High-efficiency wind-powered centrifugal pump impeller |
| CN103352868A (en) * | 2013-07-12 | 2013-10-16 | 武汉大学 | Centrifugal pump impeller hydraulic design method and designed centrifugal pump impeller |
Non-Patent Citations (2)
| Title |
|---|
| 冯新粮: "一种低比转速离心水泵叶轮的改进设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑 》 * |
| 冯新粮: "一种低比转速离心水泵叶轮的改进设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑 》, 15 June 2011 (2011-06-15) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835988A (en) * | 2014-03-11 | 2014-06-04 | 门立山 | Centrifugal pump impeller |
| CN104405678A (en) * | 2014-10-14 | 2015-03-11 | 江苏大学 | Centrifugal impeller with vaneless flow-splitting sheets |
| CN107725392A (en) * | 2016-08-11 | 2018-02-23 | 浙江三花汽车零部件有限公司 | Electronic pump |
| CN107725392B (en) * | 2016-08-11 | 2020-10-27 | 浙江三花汽车零部件有限公司 | Electronic pump |
| CN106762806A (en) * | 2017-02-16 | 2017-05-31 | 江苏大学 | A kind of centrifugal pump impeller with straightener(stator) blade |
| CN106762806B (en) * | 2017-02-16 | 2020-03-31 | 江苏凯泉泵业制造有限公司 | Centrifugal pump impeller with rectifying blades |
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Application publication date: 20140212 |