CN105134666A - Anti-cavitation centrifugal pump - Google Patents
Anti-cavitation centrifugal pump Download PDFInfo
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- CN105134666A CN105134666A CN201510617209.7A CN201510617209A CN105134666A CN 105134666 A CN105134666 A CN 105134666A CN 201510617209 A CN201510617209 A CN 201510617209A CN 105134666 A CN105134666 A CN 105134666A
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- centrifugal pump
- impeller
- laying angle
- blade
- cavitation
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Abstract
The invention relates to an anti-cavitation centrifugal pump which mainly solves the problem that an existing anti-cavitation centrifugal pump is large in size and high in installing requirement. The anti-cavitation centrifugal pump comprises a centrifugal type impeller, a shell, an inlet pipe and a main shaft. The centrifugal type impeller is installed on the main shaft and located in the shell. An axial flow type impeller is arranged in front of the centrifugal type impeller and installed on the main shaft. The axial flow type impeller comprises at least two blades and a hub. The blades are installed on the hub, located on the same axial position and evenly distributed in the circumferential direction of the hub.
Description
Technical field
The invention belongs to centrifugal pump field, particularly a kind of anti-cavitation centrifugal pump.
Background technique
Generally when centrifugal pump or tangent pump (partial emission pump) need higher anti-cavitation performance, the method improving centrifugal pump anti-cavitation performance mainly contains: 1, add before the impeller and put inducer; 2, anti-cavitation impeller is used; 3, cavitation erosion resistant material is used; 4, the setting height(from bottom) of pump is reduced; 5, preposition suction booster.Wherein add that to put inducer be more common method before the impeller, the method can solve the anti-cavitation requirement of pump preferably.The preposition inducer of current setting mostly is spiral inducer, as shown in Figure 2: it is before receded disk impeller 21, install spiral inducer 22.This spiral inducer axial length is long, external diameter is large, matching gap between inducer and inlet tube is little, main shaft arm length; Need to set up supplemental support, processing and assembling difficulty is large, and the amount of deflection of axle is large, and reliability reduces, and cost of production is high.Spiral inducer has uniform pitch or variable-pitch auger shape blade, and blade overlap coefficient is large, cornerite large, efficiency is not high, and in cavitation process, lift declines not obvious.For solving the problem, needing the diameter and the axial length that increase pump inlet pipe, thus causing the volume of pump excessive.
Summary of the invention
Problem to be solved by this invention is to provide one and has small volume and axial length is shorter, and is easy to the anti-cavitation centrifugal pump that assembles.
The technological scheme that the present invention solves the problem is: the anti-cavitation centrifugal pump provided comprises receded disk impeller, housing, inlet tube and main shaft, receded disk impeller to be installed on main shaft and to be positioned at housing, inducer was provided with before receded disk impeller, specialization of the present invention is described inducer is aial flow impeller, and aial flow impeller is installed on main shaft; Described aial flow impeller comprises at least two blades and a wheel hub, each blades installation is on wheel hub, and be positioned at same axial position, and it is uniform along wheel hub circumference, that is: the corresponding points that each blade is crossing with wheel hub are vertical with main shaft circumferentially same, forward terminal as crossing with wheel hub in each blade is circumferentially same, and each blade aft terminal crossing with wheel hub at another circumferentially.Also this aial flow impeller can be called that, for blade impellers, it is made up of three to four blades and wheel hub usually, specific speed is comparatively large, and be characterized in that flow is large, lift is low, efficiency is high, and during generation cavitation, lift declines not obvious.Due to the radius of this blade impellers and axial dimension all less, thus, the front being installed to centrifugal pump and centrifugal formula impeller not only can ensure higher anti-cavitation performance, and the overall volume of pump and axial length all reduce many than existing anti-cavitation centrifugal pump.
Above-mentioned aial flow impeller can be positioned within inlet tube, also can be positioned at outside inlet tube.
In order to easier for installation, receded disk impeller and aial flow impeller can be cast as an integrated type impeller.
Preferred version of the present invention is: described aial flow impeller comprises the wheel hub of at least two blades and an installation blade, each blade is uniform along wheel hub circumference, and the laying angle of described blade each point on same Radius circumferential section is seen to Exit-edge direction by inlet side: each point laying angle increases gradually; Entrance edge of blade laying angle increases gradually along with the reduction of radial radius, and exit edge of blade laying angle increases gradually along with the reduction of radial radius; The axle center of described circumferential section is coaxial with the rotating center of aial flow impeller.
Generally, above-mentioned exit edge of blade laying angle is 15 ° ~ 65 °, and entrance edge of blade laying angle is 15 ° ~ 42 °.
Above-mentioned blade can be 2,3 or 4.
Compared with existing anti-cavitation centrifugal pump, advantage of the present invention is:
1) the present invention using aial flow impeller as inducer, comparing conventional inducer axial length under the condition of identical cavitation specific speed is about 1/3 of conventional inducer, reduce the jib-length of pump shaft and the axial length of pump, can material be saved, reduce manufacture cost.Because the more existing inducer of working efficiency of aial flow impeller is high under same parameter, so improve the whole efficiency of pump, effectively reduce the power consumption of whole pump.
2) because inducer external diameter of the present invention is little, suitable with the main impeller import of the pump mated, do not need to carry out Spielpassung assembling between inlet tube, and the monolateral gap between inlet tube can reach more than 5mm, therefore part processing precision requirement can be reduced, also reduce assembling difficulty simultaneously, reduce the cost of production of pump.
3) improve the stability of centrifugal pump, reliability, Security and working life.Owing to not requiring the small―gap suture between inducer and inlet tube, the chance that inducer and inlet tube or inducer lining are dawdled is eliminated during pump operation, make that rotation is more stable, noise is little, reduce the wearing and tearing of rotatable parts, and extend the working life of key components and parts.
4) special occasions size being had to requirement can be applied to, as fire-fighting vehicle-mounted fire water pump, after reducing the size of fire water pump, can expensive real estate be saved, increase miscellaneous equipment.
Accompanying drawing explanation
Fig. 1 is the structural drawing of one embodiment of the invention.
Fig. 2 is the structural drawing of existing centrifugal pump.
Fig. 3 is a kind of structural drawing of Fig. 1 axis flow impeller.
Fig. 4 is the side direction view of Fig. 3.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, anti-cavitation centrifugal pump of the present invention comprises receded disk impeller 11, aial flow impeller 12, housing 13, inlet tube 14 (being also referred to as pump cover) and main shaft 15.Receded disk impeller 11 is installed on main shaft 15, is positioned at housing 13; Aial flow impeller 12 is also installed on main shaft 15, before receded disk impeller 11, is positioned within inlet tube 14.
Centrifugal pump operationally, rotates as the aial flow impeller 12 of inducer and receded disk impeller 11, the necessary fluid pressure that the lift produced by aial flow impeller 12 provides receded disk impeller 11 import to need simultaneously.
Fig. 3 and Fig. 4 gives most preferred embodiment of the present invention, is aial flow impeller is carried out optimum Match as inducer and receded disk impeller parameter, can reach good anti-cavitation performance.
Aial flow impeller wheel hub 32 is equipped with three blades 31, wheel hub 32 has two keyways coordinated with pump shaft 33.Also be fixedly connected with by singly-bound, spline, expansion sleeve or engagement thread between wheel hub with pump shaft, or otherwise connect.
Centrifugal pump impeller job design parameter is flow Q=0.08m
3/ s, lift H=200m, rotating speed n=3800rpm, impeller inlet diameter is 150mm.Inducer (aial flow impeller) external diameter is 130mm, and hub diameter is 45mm.
Entrance edge of blade 34 laying angle of inducer (aial flow impeller) is 16.8 ° ~ 41.2 °, namely increases gradually from A to C laying angle; Exit-edge 35 laying angle is 18.0 ° ~ 64.5 °, namely increases gradually from B to D laying angle.
The laying angle of each point of blade on same Radius circumferential section to be seen to Exit-edge direction by inlet side and is increased gradually, and from an e1 to an e2 on same circumferential section e (e is equivalent to a cylndrical surface) as shown in Figure 3, laying angle increases gradually.The laying angle of blade outer rim (AB arc) each point is 16.8 ° ~ 18.0 °, to be seen increase gradually by inlet side to Exit-edge direction; The laying angle of vane inside edge (hub side, CD arc) each point is 41.2 ° ~ 64.5 °, to be seen increase gradually by inlet side to Exit-edge direction.
Table 1 gives the test result of most preferred embodiment
This centrifugal pump has good anti-cavitation performance as can be seen from Table 1.
The present invention also can be used on tangent pump, namely before tangent-type impeller, arranges aial flow impeller as inducer, forms anti-cavitation tangent pump.
Claims (8)
1. an anti-cavitation centrifugal pump, comprise receded disk impeller, housing, inlet tube and main shaft, receded disk impeller to be installed on main shaft and to be positioned at housing, before receded disk impeller, be provided with inducer, it is characterized in that: described inducer is aial flow impeller, and aial flow impeller is installed on main shaft; Described aial flow impeller comprises at least two blades and a wheel hub, and each blades installation on wheel hub, and is positioned at same axial position, and uniform along wheel hub circumference.
2. anti-cavitation centrifugal pump according to claim 1, is characterized in that aial flow impeller is positioned within inlet tube.
3. anti-cavitation centrifugal pump according to claim 1, is characterized in that aial flow impeller is positioned at outside inlet tube.
4. the anti-cavitation centrifugal pump according to claim 1,2 or 3, is characterized in that: the laying angle of described blade each point on same Radius circumferential section is seen to Exit-edge direction by inlet side: each point laying angle increases gradually; Entrance edge of blade laying angle increases gradually along with the reduction of radial radius, and exit edge of blade laying angle increases gradually along with the reduction of radial radius; The axle center of described circumferential section is coaxial with the rotating center of aial flow impeller.
5. anti-cavitation centrifugal pump according to claim 4, it is characterized in that exit edge of blade laying angle is 15 ° ~ 65 °, vane inlet corner is 15 ° ~ 42 °.
6. anti-cavitation centrifugal pump according to claim 4, is characterized in that described blade is 2,3 or 4.
7. anti-cavitation centrifugal pump according to claim 4, it is characterized in that entrance edge of blade laying angle is 16.8 ° ~ 41.2 °, Exit-edge laying angle is 18.0 ° ~ 64.5 °; The laying angle of blade outer rim each point is 16.8 ° ~ 18.0 °; The laying angle of vane inside edge each point is 41.2 ° ~ 64.5 °.
8. anti-cavitation centrifugal pump according to claim 4, is characterized in that receded disk impeller and aial flow impeller are cast as an integrated type impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617209.7A CN105134666A (en) | 2015-09-24 | 2015-09-24 | Anti-cavitation centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617209.7A CN105134666A (en) | 2015-09-24 | 2015-09-24 | Anti-cavitation centrifugal pump |
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| CN105134666A true CN105134666A (en) | 2015-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510617209.7A Pending CN105134666A (en) | 2015-09-24 | 2015-09-24 | Anti-cavitation centrifugal pump |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194763A (en) * | 2016-09-20 | 2016-12-07 | 浙江工业大学 | The self-priming centrifugal pump of high anti-cavitation |
| CN106996389A (en) * | 2017-05-26 | 2017-08-01 | 西安理工大学 | A kind of short distance inducer without blade tip clearance cavitation |
| CN107701457A (en) * | 2017-11-06 | 2018-02-16 | 天华化工机械及自动化研究设计院有限公司 | A kind of HDPE mixing pumping integration apparatus |
| CN109026747A (en) * | 2018-09-03 | 2018-12-18 | 广东圣洛威科技有限公司 | A kind of semi open model water pump and its application method optimizing blade wheel structure |
| CN109162965A (en) * | 2018-11-06 | 2019-01-08 | 许胡贝 | A kind of energy-saving water pump for accelerating water transmission |
| CN109854530A (en) * | 2019-03-19 | 2019-06-07 | 苏州横海信息科技有限公司 | A kind of efficient LNG delivery pump blade wheel |
| CN114396383A (en) * | 2022-01-10 | 2022-04-26 | 成都凯天电子股份有限公司 | Oil-gas mixed transportation system |
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| CN201106576Y (en) * | 2007-07-31 | 2008-08-27 | 陕西航天动力高科技股份有限公司 | Apparatus for sealing centrifugal pump mouth loop |
| CN201111560Y (en) * | 2007-09-29 | 2008-09-10 | 上海连成（集团）有限公司 | Simple anti-cavitation structure for centrifugal pump |
| CN201539437U (en) * | 2009-06-23 | 2010-08-04 | 江苏大学 | High-efficiency axial-flow pump impeller |
| CN205089696U (en) * | 2015-09-24 | 2016-03-16 | 陕西航天动力高科技股份有限公司 | Anti -cavitation centrifugal pump |
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2015
- 2015-09-24 CN CN201510617209.7A patent/CN105134666A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201106576Y (en) * | 2007-07-31 | 2008-08-27 | 陕西航天动力高科技股份有限公司 | Apparatus for sealing centrifugal pump mouth loop |
| CN201111560Y (en) * | 2007-09-29 | 2008-09-10 | 上海连成（集团）有限公司 | Simple anti-cavitation structure for centrifugal pump |
| CN201539437U (en) * | 2009-06-23 | 2010-08-04 | 江苏大学 | High-efficiency axial-flow pump impeller |
| CN205089696U (en) * | 2015-09-24 | 2016-03-16 | 陕西航天动力高科技股份有限公司 | Anti -cavitation centrifugal pump |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194763A (en) * | 2016-09-20 | 2016-12-07 | 浙江工业大学 | The self-priming centrifugal pump of high anti-cavitation |
| CN106996389A (en) * | 2017-05-26 | 2017-08-01 | 西安理工大学 | A kind of short distance inducer without blade tip clearance cavitation |
| CN107701457A (en) * | 2017-11-06 | 2018-02-16 | 天华化工机械及自动化研究设计院有限公司 | A kind of HDPE mixing pumping integration apparatus |
| CN109026747A (en) * | 2018-09-03 | 2018-12-18 | 广东圣洛威科技有限公司 | A kind of semi open model water pump and its application method optimizing blade wheel structure |
| CN109162965A (en) * | 2018-11-06 | 2019-01-08 | 许胡贝 | A kind of energy-saving water pump for accelerating water transmission |
| CN109162965B (en) * | 2018-11-06 | 2020-11-20 | 台州威斯顿机电有限公司 | Energy-saving water pump capable of accelerating water transmission |
| CN109854530A (en) * | 2019-03-19 | 2019-06-07 | 苏州横海信息科技有限公司 | A kind of efficient LNG delivery pump blade wheel |
| CN114396383A (en) * | 2022-01-10 | 2022-04-26 | 成都凯天电子股份有限公司 | Oil-gas mixed transportation system |
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Application publication date: 20151209 |
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| RJ01 | Rejection of invention patent application after publication |