CN102392831A - Swept-curved blade for high-speed fuel oil axial-flow pump - Google Patents
Swept-curved blade for high-speed fuel oil axial-flow pump Download PDFInfo
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- CN102392831A CN102392831A CN2011103788380A CN201110378838A CN102392831A CN 102392831 A CN102392831 A CN 102392831A CN 2011103788380 A CN2011103788380 A CN 2011103788380A CN 201110378838 A CN201110378838 A CN 201110378838A CN 102392831 A CN102392831 A CN 102392831A
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Abstract
The invention relates to the technical field of a blade for an axial-flow pump and particularly relates to an impeller blade for a high-speed fuel oil axial-flow pump. A swept-curved blade comprises a wheel hub and blades, wherein the blades are arranged around the wheel hub; the blades are forward swept blades, namely, under a column coordinate system (R, theta, Z), each section of a conventional blade is forward swept along Z direction; with the central position of each section as a reference position, a forward swept angle is increased firstly and then reduced from the root of the blade to the tip of the blade; the forward swept angle Lambda 1 of the section of the root of the blade is 72-75 degrees; the forward swept angle Lambda 2 of the section of the tip of the blade is 108-110 degrees; and the forward swept angles of other sections are in smooth-curve transition. Numerical simulation calculation shows that the development of crosswise flowing secondary flow in an impeller channel can be efficiently restrained by the high-speed fuel oil axial-flow pump provided by the invention, the hydraulic efficiency and the running stability of the high-speed fuel oil axial-flow pump in a saddle-shaped area can be improved and a theoretical basis is provided for the practical engineering application.
Description
Technical field
The present invention relates to the axial flow pump blade inner technical field, particularly a kind of impeller blade of high-speed fuel oil axial-flow pump.
Background technique
The axial-flow pump flow is big, lift is low, is widely used in distruting water transregionally and irrigates water drainage.Along with scientific technological advance, axial-flow pump also is able to use like hydro-jet propulsion system, aeroengine, miniature heart-assist device etc. at other field, therefore the hydraulic characteristic of axial-flow pump is also just had higher requirement.Because the existence in " shape of a saddle " zone has had a strong impact on the operation stability of axial-flow pump unit in the Operating Performance of Axial-Flow Pumps curve, " shape of a saddle " roadability of therefore improving axial-flow pump has the practical project meaning.
At present, curved plunder blade and be widely used in turbo machine, compressor and the blower fan, but in the research of pump with use also less.A large amount of experimental research and numerical calculation show; Rationally the curved static pressure gradient that can change the turbomachine flow field of plunderring of utilization blade distributes; Suppress the development of lateral flow secondary flow in the impeller passage and the gathering of runner inner end wall low energy fluid, reach the purpose that improves the turbomachine aeroperformance.Therefore attempt in the high-speed fuel oil axial-flow pump, adopting blade to bend and plunder, be intended to avoid the formation in " shape of a saddle " zone, improve.Up to the present, still no-trump is curved plunders blade applications in the high-speed fuel oil axial-flow pump, the line correlation research and analysis of going forward side by side.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of curved blade of plunderring, to improve the hydraulic efficiency and the operation stability of high-speed fuel oil axial-flow pump, for practical engineering application provides theoretical foundation.
Technological scheme of the present invention is:
Should curved plunder blade and comprise wheel hub and blade; Blade ring is around the wheel hub setting; Said blade is the sweepforward blade, and sweepforward is carried out in the Z direction in each cross section that is about to common axial flow pump blade inner, is the reference position with the central position in each cross section; The sweepforward angle increases afterwards earlier from the blade root to the blade tip and reduces, and the sweepforward angle λ in blade root cross section
1Be 72 °～75 °, the sweepforward angle λ in blade tip cross section
2Be 108 °～110 °, the sweepforward angle in all the other each cross sections is pressed the smoothed curve transition; Wherein, the sweepforward angle is at cylindrical coordinate (R, θ; Z) under, in the R-Z plane, the tangential direction of the line of centres in each cross section of blade and the angle that axially comes flow path direction Z to be become; The center of circle O of wheel hub is the center; R is the radial direction of wheel hub, θ be in the circumferential plane of wheel hub and angle, Z is the axial direction of wheel hub.
The sweepforward angle in said blade root cross section is preferably λ
1=73.2 °, the sweepforward angle in blade tip cross section is preferably λ
2=109.4 °.
Said blade and wheel hub adopt the cast inblock structure, and blade has 4.
The present invention is owing to take above technological scheme, and it has the following advantages:
(1) the present invention carries out the curved of rational radial direction and circumferencial direction with common blade and plunders; Make to bend and plunder the static pressure gradient distribution that blade can change the impeller flow field; The development collection that suppresses lateral flow secondary flow in the impeller passage, the acting ability of raising turbomachine.
(2) the present invention will bend and plunder blade applications in the high-speed fuel oil axial-flow pump, make the high-speed fuel oil axial-flow pump curved plunder blade in the lift variation tendency than common blade high-speed fuel oil axial-flow pump in " shape of a saddle " regional transitions smooth, tangible lift do not occur and descend; Simultaneously during the small flow condition, the curved hydraulic efficiency of plunderring blade of high-speed fuel oil axial-flow pump is higher than common blade high-speed fuel oil axial-flow pump 3～5%.
(3) the present invention will bend and plunder blade applications in the high-speed fuel oil axial-flow pump; Make the high-speed fuel oil axial-flow pump bend and plunder blade when low flow rate condition; Do not form separation stall whirlpool, tangible leaf top in the curved blade inlet of plunderring; Streamline near the wheel rim place is smoothly orderly, has improved common blade high-speed fuel oil axial-flow pump when low flow rate condition, near the flow separation stall whirlpool that the blade import, obviously produces because low energy fluid is piled up.
(4) prediction of high-speed fuel oil axial-flow pump cavitation performance shows that curved the plunderring of blade do not have much affect to the high-speed fuel oil axial-flow pump during flow coefficient φ=0.72 operating mode.
(5) the inventive method is easy to operate; Can theoretical foundation be provided for practical engineering application; The present invention can improve the service behaviour of high-speed fuel oil axial-flow pump at " saddle area "; Improve hydraulic efficiency and the operation stability of high-speed fuel oil axial-flow pump, can be widely used in the high-speed fuel oil axial-flow pump at saddle area.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the curved blade schematic representation of plunderring of the embodiment of the invention;
Fig. 3 is the curved comparison diagram of plunderring the blade line of centres and the common blade line of centres of the embodiment of the invention;
Fig. 4 is the curved blade and the common blade high-speed fuel oil axial-flow pump external characteristic curve figure of plunderring of the embodiment of the invention;
Fig. 5 is the flow coefficient φ=0.72 o'clock impeller streamline distribution figure of the embodiment of the invention;
Fig. 6 is the cavitation coefficient, cavitation factor, Toma coefficient-efficiency curve diagram of the embodiment of the invention.
Label among the figure:
The 1-wheel hub, the 2-blade.
Embodiment
The invention provides a kind of impeller blade of high-speed fuel oil axial-flow pump, the present invention is carried out detailed description below in conjunction with accompanying drawing and embodiment.
The inventive method is based on following thought: according to curved design method of plunderring blade; The impeller that design one is applied on the high-speed fuel oil axial-flow pump; The blade of this impeller adopts the curved blade of plunderring; To improve " saddle area " of axial-flow pump, reclaim the energy loss of leaf top secondary flow, improve hydraulic efficiency and the operation stability of axial-flow pump at saddle area.High-speed fuel oil axial-flow pump to adopting common blade is bent the numerical simulation calculation that the high-speed fuel oil axial-flow pump of plunderring blade carries out CFD with adopting, and obtains the external characteristic curve figure of the two and analyzes relatively inner flowing characteristic.
Should curved plunder blade and comprise that wheel hub 1 and 2,4 blades 2 of blade are provided with around wheel hub 1, blade 2 adopts the cast inblock structure with wheel hub 1.Said blade is the sweepforward blade, and sweepforward is carried out in the Z direction in each cross section that is about to common axial flow pump blade inner, is the reference position with the central position in each cross section, and the sweepforward angle increases afterwards earlier from the blade root to the blade tip and reduces, and the sweepforward angle λ in blade root cross section
1Be 72 °～75 °, be preferably 73.2 °, the sweepforward angle λ in blade tip cross section
2Be 108 °～110 °, be preferably 109.4 °, the sweepforward angle in all the other each cross sections is pressed the smoothed curve transition; Wherein, the sweepforward angle is at cylindrical coordinate (R, θ; Z) under, in the R-Z plane, the tangential direction of the line of centres in each cross section of blade and the angle that axially comes flow path direction Z to be become; The center of circle O of wheel hub is the center; R is the radial direction of wheel hub, θ be in the circumferential plane of wheel hub and angle, Z is the axial direction of wheel hub.
This curved plunderred blade and carries out analog computation, may further comprise the steps:
(1) like Fig. 1, shown in Figure 2, cylindrical coordinate (R, θ, Z) under, sweepforward is carried out in circumference θ direction in each cross section of common blade; Carry out antecurvaturely in R direction radially, obtain curved each cross section of plunderring blade.
(2) as shown in Figure 3; Curved impeller, the inducer of high-speed fuel oil pump, stator section, outlet section of plunderring blade carried out grid to be divided and adopts; Carry out numerical simulation calculation among the ANSYS-CFX with dividing good grid model to import to, equal method (RANs) and SSTk-ω turbulence model when adopting Reynolds are according to the actual operating mode scope of high-speed fuel oil axial-flow pump; Boundary conditions adopts inlet flow rate condition, outlet pressure condition; And the hypothesis wall is hydraulically smooth surface, and press the given no slip boundary condition of log law, the high-speed fuel oil axial-flow pump bent plunderred blade and carry out numerical simulation.
(3) impeller, the inducer of high-speed fuel oil pump, stator section, the outlet section that common blade is constituted drawn and carried out grid and divide and adopt and the identical method for numerical simulation of step (2), and common blade high-speed fuel oil axial-flow pump is carried out numerical simulation.
(4) carry out correlation computations according to analog result, obtain axial-flow pump external characteristic curve figure, as shown in Figure 4.Can find out that from plotted curve common blade high-speed fuel oil axial-flow pump is when flow coefficient φ=0.72 operating mode, lift begins to descend, and gets into axial-flow pump " shape of a saddle " working zone; And the high-speed fuel oil axial-flow pump curved plunder blade lift variation tendency than common blade in " shape of a saddle " regional transitions smooth, tangible lift do not occur to descend; Simultaneously when flow coefficient φ＜0.72 operating mode, hydraulic efficiency is higher than reference vanes axial-flow pump 3～5%.
(5) as shown in Figure 5, curved blade and the common blade high-speed fuel oil axial-flow pump external characteristic curve figure of plunderring.As can be seen from the figure; When flow coefficient φ=0.72 operating mode, there is tangible flow separation stall whirlpool in the impeller of common blade high-speed fuel oil axial-flow pump near leaf jacking mouth; Then show as the axial-flow pump lift in external characteristics and descend, get into " shape of a saddle " operation area.And the curved blade of plunderring of high-speed fuel oil axial-flow pump is when flow coefficient φ=0.72 operating mode, and blade inlet does not form tangible leaf top and separates the stall whirlpool, and is smoothly orderly near the streamline at wheel rim place.Avoid lift decline institute to cause the whole lift of water pump to descend, thereby avoided getting into axial-flow pump " shape of a saddle " operation area.
(6) as shown in Figure 6; Flow coefficient φ=0.72 operating mode is carried out the prediction of high-speed fuel oil axial-flow pump cavitation performance, obtain cavitation coefficient, cavitation factor, Toma coefficient-efficiency curve diagram, get decrease in efficiency 1% and be critical cavitation surplus; Can obtain under this operating mode the critical cavitation coefficient σ of common blade high-speed fuel oil axial-flow pump
pBe 0.81, curved critical cavitation coefficient σ of plunderring blade high-speed fuel oil axial-flow pump
pBe 0.79, both are more or less the same, and curved the plunderring of visible blade do not have much affect to the high-speed fuel oil axial-flow pump.
Above-mentioned each embodiment only is used to explain the present invention, and wherein the structure of each parts, Placement etc. all can change to some extent, and every equivalents of on the basis of technological scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (3)
1. a high-speed fuel oil axial-flow pump is bent and is plunderred blade, comprises wheel hub (1) and blade (2), and blade (2) is provided with around wheel hub (1); It is characterized in that; Said blade (2) is the sweepforward blade, and sweepforward is carried out in the Z direction in each cross section that is about to common axial flow pump blade inner, is the reference position with the central position in each cross section; The sweepforward angle constantly increases from the blade root to the blade tip, and the sweepforward angle λ in blade root cross section
1Be 72 °～75 °, the sweepforward angle λ in blade tip cross section
2Be 108 °～110 °, the sweepforward angle in all the other each cross sections is pressed the smoothed curve transition; Wherein, the sweepforward angle is at cylindrical coordinate (R, θ; Z) under, in the R-Z plane, the tangential direction of the line of centres in each cross section of blade and the angle that axially comes flow path direction Z to be become; The center of circle O of wheel hub is the center; R is the radial direction of wheel hub, θ be in the circumferential plane of wheel hub and angle, Z is the axial direction of wheel hub.
2. a kind of high-speed fuel oil axial-flow pump according to claim 1 is curved plunders blade, it is characterized in that the sweepforward angle in said blade root cross section is preferably λ
1=73.2 °, the sweepforward angle in blade tip cross section is preferably λ
2=109.4 °.
3. a kind of high-speed fuel oil axial-flow pump according to claim 1 is curved plunders blade, it is characterized in that said blade and wheel hub adopt the cast inblock structure, and blade has 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103788380A CN102392831A (en) | 2011-11-24 | 2011-11-24 | Swept-curved blade for high-speed fuel oil axial-flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103788380A CN102392831A (en) | 2011-11-24 | 2011-11-24 | Swept-curved blade for high-speed fuel oil axial-flow pump |
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| CN102392831A true CN102392831A (en) | 2012-03-28 |
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| CN2011103788380A Pending CN102392831A (en) | 2011-11-24 | 2011-11-24 | Swept-curved blade for high-speed fuel oil axial-flow pump |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678322A (en) * | 2017-02-28 | 2017-05-17 | 湖北威能达驱动技术***有限公司 | Hydraulic coupler vane wheel and hydraulic coupler |
| CN110319057A (en) * | 2019-07-18 | 2019-10-11 | 江阴市精亚风机有限公司 | A kind of front bended sweepforward fills formula blade, impeller and its axial flow blower partially |
| CN111255743A (en) * | 2020-03-02 | 2020-06-09 | 广东美的厨房电器制造有限公司 | Fan blade, cooling fan and microwave oven |
| CN114483648A (en) * | 2022-01-27 | 2022-05-13 | 杭州老板电器股份有限公司 | Blade design method, blade and centrifugal fan |
Citations (3)
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| CN1085993A (en) * | 1993-09-23 | 1994-04-27 | 季海林 | Axial-flow type high-speed paddle pump |
| JP2004305828A (en) * | 2003-04-03 | 2004-11-04 | Matsushita Electric Ind Co Ltd | Fluid supply device |
| CN101830278A (en) * | 2010-05-13 | 2010-09-15 | 中国农业大学 | Serial axial-flow water jet propulsion pump |
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2011
- 2011-11-24 CN CN2011103788380A patent/CN102392831A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085993A (en) * | 1993-09-23 | 1994-04-27 | 季海林 | Axial-flow type high-speed paddle pump |
| JP2004305828A (en) * | 2003-04-03 | 2004-11-04 | Matsushita Electric Ind Co Ltd | Fluid supply device |
| CN101830278A (en) * | 2010-05-13 | 2010-09-15 | 中国农业大学 | Serial axial-flow water jet propulsion pump |
Non-Patent Citations (2)
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| 吕腾飞: "弯掠叶片对轴流泵驼峰特性的影响研究", 《第四届全国水力机械及其***会议论文集》, 18 September 2011 (2011-09-18), pages 234 - 236 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678322A (en) * | 2017-02-28 | 2017-05-17 | 湖北威能达驱动技术***有限公司 | Hydraulic coupler vane wheel and hydraulic coupler |
| CN106678322B (en) * | 2017-02-28 | 2023-10-03 | 湖北威能达驱动技术***有限公司 | Impeller of hydraulic coupler and hydraulic coupler |
| CN110319057A (en) * | 2019-07-18 | 2019-10-11 | 江阴市精亚风机有限公司 | A kind of front bended sweepforward fills formula blade, impeller and its axial flow blower partially |
| CN110319057B (en) * | 2019-07-18 | 2024-04-26 | 江苏精亚风机有限公司 | Forward bending forward-swept offset blade, impeller and axial flow fan thereof |
| CN111255743A (en) * | 2020-03-02 | 2020-06-09 | 广东美的厨房电器制造有限公司 | Fan blade, cooling fan and microwave oven |
| CN114483648A (en) * | 2022-01-27 | 2022-05-13 | 杭州老板电器股份有限公司 | Blade design method, blade and centrifugal fan |
| CN114483648B (en) * | 2022-01-27 | 2024-04-09 | 杭州老板电器股份有限公司 | Blade design the method is blade and centrifugal fan |
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Application publication date: 20120328 |