CN104929973A - Multiple-stage centrifugal pump impeller matched with radial guide vane - Google Patents
Multiple-stage centrifugal pump impeller matched with radial guide vane Download PDFInfo
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- CN104929973A CN104929973A CN201510231112.2A CN201510231112A CN104929973A CN 104929973 A CN104929973 A CN 104929973A CN 201510231112 A CN201510231112 A CN 201510231112A CN 104929973 A CN104929973 A CN 104929973A
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- centrifugal pump
- pump impeller
- multistage centrifugal
- cover plate
- impeller
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Abstract
The invention discloses a multiple-stage centrifugal pump impeller matched with a radial guide vane. The multiple-stage centrifugal pump impeller comprises a front cover plate, a rear cover plate, cylindrical blades and a hub penetrating through the circle center of the rear cover plate. The blades of the impeller are cylindrical blades. The thickness of outlets of the blades becomes small. The back faces of the blades bevel. A certain angle is formed by the tangent lines and diagonal lines of curves of the back faces of the blades. The radius of the cylindrical blades is smaller than that of the front rear cover plate and that of the rear cover plate. The front cover plate of the impeller extends forwards by a certain distance relative to the hub penetrating through the circle center of the rear cover plate. The multiple-stage centrifugal pump impeller is simple in structure and convenient to process. The flowing characteristic of an outlet of the impeller is improved. On the basis of guaranteeing the hydraulic performance of a multiple-stage centrifugal pump, noise is lowered, and water pump noise pollution can be effectively eliminated under the conditions that residents use water.
Description
Technical field
The present invention relates to a kind of multistage centrifugal pump impeller, particularly relate to the Low Noise Design multistage centrifugal pump impeller that a kind of and radial stator mates, be mainly used in solving noise problem.
Background technique
Centrifugal pump, as important fluid machinery, is widely used in industrial or agricultural and all fields of national economy.Multistage centrifugal pump is at different levels to be chained together, and every one-level is all made up of an impeller and a stator, can provide the lift more much higher than single stage centrifugal pump, for occasions such as urban architecture water supply and resident living water superchargings.Impeller is the core of water pump, all plays vital effect to the parameter such as flow, lift, efficiency of multistage centrifugal pump.In urbanite water consumption, pump capacity is little, and lift demand is high, and spatial constraints, and the many and radial stator of multistage centrifugal pump mates.
Along with the continuous research to water pump, pump performance is greatly enhanced, and people more and more pay attention to residing environmental amenity degree in addition, and the research of water pump noise becomes to attach most importance to gradually.Existing pumps design is only paid close attention to and is improved the hydraulic parameters such as its lift, power, efficiency, but have ignored noise problem, when particularly it is for resident living, affects physical and mental health and the quality of life of people.Therefore, in the urgent need on the basis ensureing multistage centrifugal pump hydraulic performance, change blade wheel structure, thus reduce or suppress its noise.
Summary of the invention
The object of this invention is to provide the multistage centrifugal pump impeller that a kind of and radial stator mates, thus reduce the noise of water pump, reach Low Noise Design requirement.
For achieving the above object, the technical solution adopted in the present invention:
The multistage centrifugal pump impeller mated with radial stator, multistage centrifugal pump impeller and radial stator form one-level, and described multistage centrifugal pump impeller comprises front shroud, back shroud, blade and runs through the wheel hub in the back shroud center of circle; Described blade is plain vane, blade exit place lower thickness, cuts sth. askew in vacuum side of blade outlet port, and vacuum side of blade curve near tangent is α=30 ° with line of cutting sth. askew, and described blade radius r1 is lower than front shroud, back shroud radius R 1.
As a further improvement on the present invention, described blade radius r1 and front shroud, back shroud radius R 1 meet r1=(0.97 ~ 0.99) R1.
As a further improvement on the present invention, described front shroud is compared with wheel hub, and the axis of front shroud extends distance d1 forward, and whole multistage centrifugal pump impeller axial length is D1, meets: d1=(0.05 ~ 0.12) D1.
As a further improvement on the present invention, described blade quantity is 6-8 sheet.
As a further improvement on the present invention, the minimum thickness of described blade is the half of maximum blade thickness.
Compared with prior art, the invention has the beneficial effects as follows: when keeping multistage centrifugal pump casing and radial stator is constant, changing inner blade wheel structure, keep conservancy property constant, increase the gap of sound jointing place, thus reach the effect reducing noise; Structure is simple, and reasonable in design, easy for installation, radial stator does not need to redesign again, avoids the casting of die sinking again of multistage centrifugal pump casing; Particularly in the multistage centrifugal pump designed, there is water pump noise problem, only need to carry out simple secondary operations to impeller, just can reach the effect reducing noise.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is mated with radial stator;
Fig. 2 is plain vane of the present invention, back shroud plane figure;
Fig. 3 is axis projection of the present invention.
In figure, 1, multistage centrifugal pump impeller; 2, radial stator; 3, front shroud; 4, back shroud; 5, plain vane; 6, run through the wheel hub in the back shroud center of circle.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of ", multiple " is two or more except as otherwise noted.
Fig. 1 is the structural representation that low noise multistage centrifugal pump impeller mates with radial stator, multistage centrifugal pump impeller 1 and radial stator 2 form one-level, be connected between radial stator 2 cover plate and make at different levels can being cascaded, the multistage centrifugal pump impeller 1 of every grade is connected with pump shaft by keyway; Radial stator 2 is complex-shaped, flow velocity is wherein very high, when pump shaft drives multistage centrifugal pump impeller 1 High Rotation Speed, current are through multistage centrifugal pump impeller 1 runner, enter the guide vane of radial stator 2, enter the return guide vane of radial stator 2 through diffusion transition section, then enter next stage multistage centrifugal pump impeller 1 runner, thus reach higher lift; Multistage centrifugal pump impeller 1 export and gap between radial stator 2 import very little, thus ensure the high-lift of water pump, but be also the main source that multistage centrifugal pump noise produces.
Fig. 2 is plain vane 5, back shroud 4 plane figure of multistage centrifugal pump impeller 1, and plain vane 5 is key components of design multistage centrifugal pump impeller 1, and the change of its shape can affect the conservancy property of multistage centrifugal pump largely; The runner of current between blade 5, the back side of blade 5 is zone of high pressure, thus pump performance can be made to improve to the amendment of plain vane 5 back side shape; Plain vane lower thickness, minimum thickness is the half of blade 5 maximum ga(u)ge, and make the area of passage of multistage centrifugal pump impeller 1 runner increase like this, flow, lift are greatly improved; Plain vane 5 back side is the shape of cutting sth. askew, and vacuum side of blade curve near tangent is α with wire clamp angle of cutting sth. askew, and experiment shows, when α=30 °, multistage centrifugal pump impeller 1 outlet stream is relatively steady, effectively can eliminate the impact of Karman vortex street, thus reach the object of noise reduction.
Fig. 3 is the axis projection of multistage centrifugal pump impeller, its front shroud 3, the radius R 1 of back shroud 4 is identical, the radius of plain vane 5 is r1, lower than front shroud of impeller 3, back shroud 4 radius R 1, described like this blade 5 outlet port forms one section of water ring to multistage centrifugal pump impeller 1 edge, be equivalent to the gap increasing multistage centrifugal pump impeller 1 and radial stator 2, serve the effect reducing noise, but the reduction of plain vane 5 radius r 1 can make the reduction of water lift of pump, front shroud of impeller 3, back shroud 4 radius R 1 is constant, enter radial stator 2 in order to current better can be collected, thus guarantee conservancy property, therefore, consider hydraulic performance and noise reduction degree, r1=(0.97 ~ 0.99) R1, at impeller inlet place, its front shroud 3 does not line up with wheel hub 6 end face running through the back shroud center of circle, extend distance d1 forward, form one section of cylindrical transition water body, current enter next stage multistage centrifugal pump impeller 1 through radial stator 2, speed transfers axial velocity to by radial velocity, velocity variations is large, and cylindrical transition water body can slow down the impact of current, considers, whole multistage centrifugal pump impeller is D1, d1=(0.05 ~ 0.12) D1 at the width of axial direction.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Above to the multistage centrifugal pump impeller that a kind of and radial stator provided by the present invention mates, and to this has been detailed introduction, apply specific case herein to set forth principle of the present invention and mode of execution, be noted that, the foregoing is only preferred embodiment of the present invention, not in order to limit the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the multistage centrifugal pump impeller mated with radial stator, it is characterized in that: multistage centrifugal pump impeller (1) and radial stator (2) form one-level, and described multistage centrifugal pump impeller (1) comprises front shroud (3), back shroud (4), blade (5) and runs through the wheel hub (6) in back shroud (4) center of circle;
Described blade (5) is plain vane, blade (5) outlet port lower thickness, cut sth. askew in blade (5) outlet port, the back side, and blade (5) back side curve near tangent is α=30 ° with line of cutting sth. askew, described blade (5) radius r 1 is lower than front shroud (3), back shroud (4) radius R 1.
2. the multistage centrifugal pump impeller that mates of stator according to claim 1 and radial, is characterized in that: described blade (5) radius r 1 and front shroud (3), back shroud (4) radius R 1 meet: r1=(0.97 ~ 0.99) R1.
3. the multistage centrifugal pump impeller that mates of stator according to claim 1 and radial, it is characterized in that: described front shroud (3) is compared with wheel hub (6), the axis of front shroud (3) extends distance d1 forward, whole multistage centrifugal pump impeller (1) axial length is D1, meets: d1=(0.05 ~ 0.12) D1.
4. the multistage centrifugal pump impeller that mates of stator according to claim 1 and radial, is characterized in that: described blade (5) quantity is 6-8 sheet.
5. the multistage centrifugal pump impeller that mates of stator according to claim 1 and radial, is characterized in that: the minimum thickness of described blade (5) is the half of blade (5) maximum ga(u)ge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510231112.2A CN104929973A (en) | 2015-05-08 | 2015-05-08 | Multiple-stage centrifugal pump impeller matched with radial guide vane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510231112.2A CN104929973A (en) | 2015-05-08 | 2015-05-08 | Multiple-stage centrifugal pump impeller matched with radial guide vane |
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| CN104929973A true CN104929973A (en) | 2015-09-23 |
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| CN201510231112.2A Pending CN104929973A (en) | 2015-05-08 | 2015-05-08 | Multiple-stage centrifugal pump impeller matched with radial guide vane |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661952A (en) * | 2018-07-03 | 2018-10-16 | 浙江融乐环境科技有限公司 | A kind of assembly type guide vane of water pump blade |
| CN112682350A (en) * | 2020-12-16 | 2021-04-20 | 安徽工程大学 | Design method for thickness of centrifugal pump impeller blade |
| CN114688095A (en) * | 2020-12-25 | 2022-07-01 | 上海连成（集团）有限公司 | Radial-to-axial final-stage guide vane of vertical pipeline multistage centrifugal pump |
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| JP2005240630A (en) * | 2004-02-25 | 2005-09-08 | Tsurumi Mfg Co Ltd | Constraint preventing structure of submergible centrifugal pump |
| CN201027656Y (en) * | 2006-09-19 | 2008-02-27 | 邹节廉 | Speed-adjusting main feed pump of energy-saving hydraulic coupler |
| CN102959249A (en) * | 2010-06-30 | 2013-03-06 | 爱信精机株式会社 | Impeller and method for producing same |
| CN103216452A (en) * | 2013-04-25 | 2013-07-24 | 常州雷利电机科技有限公司 | Draining pump |
| CN203756551U (en) * | 2013-11-01 | 2014-08-06 | 江苏大学 | Multi-stage self-priming centrifugal pump |
| CN204663967U (en) * | 2015-05-08 | 2015-09-23 | 江苏大学 | The multistage centrifugal pump impeller that a kind of and radial stator mates |
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2015
- 2015-05-08 CN CN201510231112.2A patent/CN104929973A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240630A (en) * | 2004-02-25 | 2005-09-08 | Tsurumi Mfg Co Ltd | Constraint preventing structure of submergible centrifugal pump |
| CN201027656Y (en) * | 2006-09-19 | 2008-02-27 | 邹节廉 | Speed-adjusting main feed pump of energy-saving hydraulic coupler |
| CN102959249A (en) * | 2010-06-30 | 2013-03-06 | 爱信精机株式会社 | Impeller and method for producing same |
| CN103216452A (en) * | 2013-04-25 | 2013-07-24 | 常州雷利电机科技有限公司 | Draining pump |
| CN203756551U (en) * | 2013-11-01 | 2014-08-06 | 江苏大学 | Multi-stage self-priming centrifugal pump |
| CN204663967U (en) * | 2015-05-08 | 2015-09-23 | 江苏大学 | The multistage centrifugal pump impeller that a kind of and radial stator mates |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661952A (en) * | 2018-07-03 | 2018-10-16 | 浙江融乐环境科技有限公司 | A kind of assembly type guide vane of water pump blade |
| CN112682350A (en) * | 2020-12-16 | 2021-04-20 | 安徽工程大学 | Design method for thickness of centrifugal pump impeller blade |
| CN112682350B (en) * | 2020-12-16 | 2023-08-18 | 安徽工程大学 | Design method for thickness of impeller blade of centrifugal pump |
| CN114688095A (en) * | 2020-12-25 | 2022-07-01 | 上海连成（集团）有限公司 | Radial-to-axial final-stage guide vane of vertical pipeline multistage centrifugal pump |
| CN114688095B (en) * | 2020-12-25 | 2024-05-14 | 上海连成（集团）有限公司 | Radial-axial last-stage guide vane of vertical pipeline multistage centrifugal pump |
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| PB01 | Publication | ||
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Application publication date: 20150923 |