CN103486048A - Photovoltaic variable speed multistage centrifugal pump structure - Google Patents
Photovoltaic variable speed multistage centrifugal pump structure Download PDFInfo
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- CN103486048A CN103486048A CN201310438325.3A CN201310438325A CN103486048A CN 103486048 A CN103486048 A CN 103486048A CN 201310438325 A CN201310438325 A CN 201310438325A CN 103486048 A CN103486048 A CN 103486048A
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- impeller
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Abstract
A photovoltaic variable speed multistage centrifugal pump structure relates to the technical field of centrifugal pump manufacture. The structure comprises a first-stage impeller, a first-stage guide vane, a second-stage impeller, an overrunning clutch, a flow guide casing, a last-stage impeller, a last-stage guide vane and a pump casing. The first-stage impeller and the second-stage impeller are fixed on a pump shaft I through key connection and rotate with the pump shaft I. The last-stage impeller is fixed on a pump shaft II through key connection and rotates with the pump shaft II. Two sides of the overrunning clutch are fixed on the pump shaft I and the pump shaft II respectively through key connection. When the pump shaft I exceeds the critical speed, the overrunning clutch combines the pump shaft I and the pump shaft II which rotate together. The flow guide casing is located between the second-stage impeller and the last-stage impeller and embedded in the outside of the overrunning clutch, and liquid discharged by the second-stage impeller is guided into the last-stage impeller through the flow guide casing. The structure is mainly used in pump rotating speed variation occasions, for example, photovoltaic-power-supply-driven pumps. The pumps work in a load-variation mode along with the rotating speed and are high in operation efficiency.
Description
Technical field
The invention belongs to centrifugal pump manufacturing technology field, particularly a kind of photovoltaic speed change multistage centrifugal pump structure.
Background technique
Photovoltaic water pump load at present mostly is well pump with pump, and well typically has a diameter from the 4-6 inch, and when required lift is 30-120m, pump used must be chosen the multistage centrifugal submersible pump.The photovoltaic water pump system load is directly directly chosen usually with centrifugal pump in existing general purpose centrifugal pump, but, photovoltaic system is subject to the regular variable effect of whole day illumination, institute's electricity has the characteristics of himself, and the flow-power of traditional single axle multistage pump centrifugal pump and flow-lift characteristic and photovoltaic system can not reach coupling well, as when illumination intensity is low, revolution speed is lower, can not provide enough lifts to draw water, on the other hand, when illumination intensity is high, the photovoltaic electricity can not fully effective utilization and cause waste.
Through retrieval, patent application related to the present invention has: (publication number: CN1439808A), this characteristic feature of an invention is that the pump housing is divided into to two-part to the multistage sectional centrifugal pump that impeller is arranged symmetrically with, and two-part impeller inlet opposite direction, for longitudinal balance.But structure is coaxial-type, the each several part impeller is on same axle, without separating and speed changing function.
Photovoltaic water pump system (publication number: 101109387B) with hydraulic pressure control function, this patent of invention utilizes the battery stores photovoltaic to generate electricity can, the feed water pump power supply, and adopt the water pressure monitoring device to be detected and closed loop control hydraulic pressure, utilize the way of " peak shifting and valley filling " to improve photovoltaic water pump efficiency.But the method need be added storage battery and water pressure monitoring and control apparatus, the system complex costliness, and use storage battery can cause secondary pollution.
A kind of new technology (publication number: CN103075330) that improves photovoltaic water pump system efficiency, two and above identical water pump parallel operation for this patent, when light intensity is low, only start a pump working, when light intensity is higher, two or many water pumps can be worked simultaneously, and the whole efficiency of photovoltaic system is improved.Will use two and above pump but this system is used, and need supporting control apparatus, not only the cost ratio General System is expensive, very inconvenience while installing in well.
Summary of the invention
Technical problem to be solved by this invention is, multistage centrifugal pump and photovoltaic system do not mate, the inefficient defect of pump 24 hour operation, solution provided by the present invention is by changing the multistage centrifugal pump structure, speed change multistage centrifugal pump structure for a kind of photovoltaic is proposed, make traditional single axle multistage pump become separable modular type multistage pump, this multistage centrifugal pump is by impeller modular type axle segmented mode varying load operation, the energy provided according to photovoltaic system decides the progression of centrifugal pump load operation, simple in structure, operational efficiency is high.
Technological scheme of the present invention is: speed change multistage centrifugal pump structure for a kind of photovoltaic comprises first stage impeller, chopped-off head stator, secondary impeller, free wheel device, blower inlet casing, impeller, final stage stator, pump case, pump shaft I and concentric pump shaft II.
First stage impeller and secondary impeller are fixed on the pump shaft I by key connecting, together with the pump shaft I, rotate; Impeller is fixed on the pump shaft II by key connecting, together with described pump shaft II, rotates; First stage impeller, stator and secondary impeller, impeller are identical with general multistage centrifugal pump.The free wheel device both sides connect and are separately fixed on pump shaft I and pump shaft II by key, for the pump shaft I is separated and combination with the pump shaft II, be that pump shaft I rotating speed is not while reaching the critical speed of rotation of free wheel device, the centrifugal force deficiency, can not drive free wheel device and rotate together with the pump shaft II, only have the pump shaft I to rotate; When pump shaft I rotating speed surpasses the critical speed of rotation of free wheel device, the enough senior generals of centrifugal force drive free wheel device and rotate together with the pump shaft II; Blower inlet casing, between secondary impeller and impeller, is nested in the free wheel device outside, for the liquid that secondary impeller is discharged, imports impeller.
First stage impeller, stator, secondary impeller and impeller blade are identical with the blade of common multistage centrifugal pump, are three-dimensional twisted forms, and this is in order to improve the hydraulic performance of impeller; First stage impeller, secondary impeller and impeller structure are identical, and first stage impeller and impeller exit width are than the little 3～5mm of the entrance width of stator; Blower inlet casing import and secondary impeller outlet join, and import is three-dimensional twisted blade shape, and this is in order to reduce hydraulic loss; Secondary impeller outlet width is than the wide 3～5mm of blower inlet casing import; The blower inlet casing outlet is joined with the impeller import, exports as three-dimensional twisted blade shape, and this is in order to be prewhirled to liquid, improves hydraulic performance, and the blower inlet casing outlet diameter is than the large 2～3mm of impeller inlet diameter.The blower inlet casing intermediate portion is cylindrical form, for collecting and water conservancy diversion liquid, and wall thickness 10～12mm in the middle of blower inlet casing.
The invention has the beneficial effects as follows: multi-stage impeller adopt to separate axis structure, and impellers at different levels arrange vertically, and size is suitable, simple in structure with general multistage pump; Two sections axles can be realized separating and combination by free wheel device, and driven axle can be realized rotating with difference with driving shaft simultaneously and rotate; The blower inlet casing import adopts three-dimensional twisted blade shape with outlet, and hydraulic loss is little, and the way is high.
The accompanying drawing explanation
Fig. 1 is speed change multistage centrifugal pump structural profile schematic diagram for a kind of photovoltaic of the present invention.
Fig. 2 is blower inlet casing import schematic diagram.
Fig. 3 is blower inlet casing outlet schematic diagram.
In figure: 1. pump shaft I, 2. first stage impeller, 3. chopped-off head stator, 4. time level impeller, 5. blower inlet casing, 6. free wheel device, 7. pump shaft II, 8. pump case, 9. impeller, 10. final stage stator, 11. blower inlet casing inlet vanes, 12. blower inlet casings outlet blades.
Embodiment
In conjunction with Fig. 1, photovoltaic of the present invention comprises first stage impeller 2, chopped-off head stator 3, secondary impeller 4, free wheel device 6, blower inlet casing 5, impeller 9, final stage stator 10, pump case 8 with speed change multistage centrifugal pump structure, first stage impeller 3 and secondary impeller 4 are fixed on pump shaft I 1 by key connecting, together with described pump shaft I 1, rotate; Impeller 9 is fixed on pump shaft II 7 by key connecting, together with described pump shaft II 7, rotates; Free wheel device 6 both sides connect and are separately fixed on pump shaft I 1 and pump shaft II 7 by key; When pump shaft I 1 surpasses critical speed of rotation, free wheel device 6 is by the rotation that combines of pump shaft I 1 and pump shaft II 7; Blower inlet casing 5 is between secondary impeller 4 and impeller 9, be nested in free wheel device 6 outsides, blower inlet casing import 11 is three-dimensional twisted blade shape with blower inlet casing outlet 12, and centre is cylindrical profile, and the liquid that blower inlet casing 5 is discharged secondary impeller 4 imports impeller 9.Photovoltaic of the present invention is identical with common multistage centrifugal pump structure by other structures of speed change multistage pump, repeats no more.
In conjunction with Fig. 2, blower inlet casing import 11 is three-dimensional twisted blade shape, and the number of blade is 5, blower inlet casing import 11 collect and the liquid that guides 4 outlets of secondary impeller to the blower inlet casing middle part, the meander configuration blade can reduce the pump hydraulic loss.
In conjunction with Fig. 3, blower inlet casing outlet 12 is three-dimensional twisted blade shape, and the number of blade is 5, and blower inlet casing outlet 12 is carried out pre-supination by the liquid of collection and imported impeller 9 imports, and the meander configuration blade is prewhirled can improve the pump hydraulic performance.
Working procedure is as follows:
When a little less than illumination intensity, the electric energy that photovoltaic system provides is little, pump shaft I 1 rotating speed does not reach free wheel device 6 critical speed of rotation, only have the pump shaft I to rotate, now pump only has first stage impeller 2 and secondary impeller 4 with 1 rotation of pump shaft I, through the liquid of blower inlet casing 5, by non-rotary impeller 9 and final stage stator 10, discharges; When illumination intensity is strong, the electric energy abundance that photovoltaic system provides, pump shaft I 1 rotating speed reaches free wheel device 6 critical speed of rotation, free wheel device 6 will drive pump shaft II 7 and rotate together, rotate acting by impeller through the liquid of blower inlet casing 5 after entering impeller 9 and discharge by the final stage stator.
Claims (6)
1. speed change multistage centrifugal pump structure for a photovoltaic, comprise first stage impeller (2), chopped-off head stator (3), secondary impeller (4), free wheel device (6), blower inlet casing (5), impeller (9), final stage stator (10), pump case (8), it is upper that first stage impeller (2) and secondary impeller (4) are fixed on pump shaft I (1) by key connecting, together with pump shaft I (1), rotates; It is upper that impeller (9) is fixed on pump shaft II (7) by key connecting, together with described pump shaft II (7), rotates; Free wheel device (6) is nested in blower inlet casing (5), and free wheel device (6) both sides connect and are separately fixed on pump shaft I (1) and pump shaft II (7) by key; When pump shaft I (1) surpasses critical speed of rotation, free wheel device is by the rotation that combines of pump shaft I (1) and pump shaft II (7); Blower inlet casing (5) is positioned between secondary impeller (4) and impeller (9), is nested in free wheel device (6) outside, and the liquid that blower inlet casing (5) is discharged secondary impeller (4) imports impeller (9).
2. speed change multistage centrifugal pump structure for a kind of photovoltaic according to claim 1, it is characterized in that: described blower inlet casing (5) feed-water end is in secondary impeller (4) outside, blower inlet casing (5) feed-water end and waterexit end are three-dimensional twisted form blade, and intermediate portion is cylindrical; Blower inlet casing (5) water inlet and waterexit end three-dimensional twisted blade and blade apex distance pump case (8) radial spacing 0～2mm.
3. speed change multistage centrifugal pump structure for a kind of photovoltaic according to claim 1, it is characterized in that: described free wheel device (6) is 10～12mm with blower inlet casing (5) radial clearance each other, and axial clearance is 2～4mm.
4. speed change multistage centrifugal pump structure for a kind of photovoltaic according to claim 1, it is characterized in that: described pump shaft I (1) and pump shaft II (7) connect by free wheel device (6), and pump shaft I (1) is driving shaft, and pump shaft II (7) is driven shaft; Pump shaft I (1) and pump shaft II (7) axial spacing 3～5mm.
5. speed change multistage centrifugal pump structure for a kind of photovoltaic according to claim 1, it is characterized in that: first stage impeller, stator, secondary impeller and impeller blade are identical with the blade of common multistage centrifugal pump, are three-dimensional twisted forms.
6. speed change multistage centrifugal pump structure for a kind of photovoltaic according to claim 1, it is characterized in that: blower inlet casing import and secondary impeller outlet join, and import is three-dimensional twisted blade shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310438325.3A CN103486048B (en) | 2013-09-24 | 2013-09-24 | Speed change multistage centrifugal pump configuration for a kind of photovoltaic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310438325.3A CN103486048B (en) | 2013-09-24 | 2013-09-24 | Speed change multistage centrifugal pump configuration for a kind of photovoltaic |
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| Publication Number | Publication Date |
|---|---|
| CN103486048A true CN103486048A (en) | 2014-01-01 |
| CN103486048B CN103486048B (en) | 2016-06-15 |
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| CN201310438325.3A Expired - Fee Related CN103486048B (en) | 2013-09-24 | 2013-09-24 | Speed change multistage centrifugal pump configuration for a kind of photovoltaic |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1342709A (en) * | 1970-10-01 | 1974-01-03 | Sss Patents Ltd | Electrical power generating plant |
| US4292540A (en) * | 1980-07-30 | 1981-09-29 | Thompson Worthington J | Wind-powered impeller-mixer |
| CN2229983Y (en) * | 1995-06-05 | 1996-06-26 | 海城市三鱼水泵厂 | Guiding vane and volute casing combination type multi-stage miniature pump |
| JP2004150300A (en) * | 2002-10-29 | 2004-05-27 | Aisin Seiki Co Ltd | Water pump |
| JP2005337202A (en) * | 2004-05-31 | 2005-12-08 | Kubota Corp | Double suction centrifugal pump |
| CN2764970Y (en) * | 2005-02-24 | 2006-03-15 | 大连四方佳特流体设备有限公司 | Breath type horizontal multi-stage centrifugal pump |
| CN101187378A (en) * | 2007-12-13 | 2008-05-28 | 姚庆余 | Underground brine collection and transport dedicated pump and its production method |
| CN203532268U (en) * | 2013-09-24 | 2014-04-09 | 江苏大学 | Speed changing multiple-stage centrifugal pump structure for photovoltaic power system |
-
2013
- 2013-09-24 CN CN201310438325.3A patent/CN103486048B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1342709A (en) * | 1970-10-01 | 1974-01-03 | Sss Patents Ltd | Electrical power generating plant |
| US4292540A (en) * | 1980-07-30 | 1981-09-29 | Thompson Worthington J | Wind-powered impeller-mixer |
| CN2229983Y (en) * | 1995-06-05 | 1996-06-26 | 海城市三鱼水泵厂 | Guiding vane and volute casing combination type multi-stage miniature pump |
| JP2004150300A (en) * | 2002-10-29 | 2004-05-27 | Aisin Seiki Co Ltd | Water pump |
| JP2005337202A (en) * | 2004-05-31 | 2005-12-08 | Kubota Corp | Double suction centrifugal pump |
| CN2764970Y (en) * | 2005-02-24 | 2006-03-15 | 大连四方佳特流体设备有限公司 | Breath type horizontal multi-stage centrifugal pump |
| CN101187378A (en) * | 2007-12-13 | 2008-05-28 | 姚庆余 | Underground brine collection and transport dedicated pump and its production method |
| CN203532268U (en) * | 2013-09-24 | 2014-04-09 | 江苏大学 | Speed changing multiple-stage centrifugal pump structure for photovoltaic power system |
Non-Patent Citations (1)
| Title |
|---|
| 邹龙庆等: "油田注水集输系统离心泵调速节能研究", 《石油机械》 * |
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| CN103486048B (en) | 2016-06-15 |
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