CN105332950B - A kind of centrifugal pump with low-noise characteristic - Google Patents
A kind of centrifugal pump with low-noise characteristic Download PDFInfo
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Abstract
The present invention relates to a kind of centrifugal pump, a kind of centrifugal pump with low-noise characteristic is refered in particular to, belongs to field of fluid machinery.The centrifugal pump includes spiral case, it is characterised in that：The arc-shaped edges midpoint of spiral case cut water and the line in the circular arc center of circle of spiral case cut water and the angle of vertical direction are defined as cut water angle φ, the angle and the matching relationship of blade exit angle beta have fairly obvious influence to the noiseproof feature of centrifugal pump, as φ=[(5 ° of β) ~ (+5 ° of β)], centrifugal pump can obtain preferable low-noise performance, and centrifugal pump now is referred to as low noise centrifugal pump.
Description
Technical field
The present invention relates to a kind of centrifugal pump, a kind of centrifugal pump with low-noise characteristic is refered in particular to, belongs to field of fluid machinery.
Background technology
Centrifugal pump is a kind of universal machine, and important role is all play in the every field of national economy, its efficiently,
Safely and steadily run be Centrifugal Pump Design pursue final goal；Spiral case is the important composition part of centrifugal pump, and it is mainly made
With being to collect the liquid for going out stream from impeller, and the turning effort of fluid is eliminated, due to the discharge section area of spiral case
It is continuously increased, therefore the kinetic energy of liquid effectively can also be changed into pressure energy by it, so as to reduce the loss of flowing；Work as leaf simultaneously
When taking turns periodic performance by spiral case cut water, larger pressure fluctuation will be produced, such a phenomenon is referred to as the stator-rotor interaction of impeller-cut water
Effect, the effect is the important sources of centrifugal pump vibration noise, and in some fields（Petrochemical industry, nuclear power）Vibration to centrifugal pump is made an uproar
Acoustic performance has strict requirements, and too high vibration noise seriously endangers the stabilization for arriving pump, safe operation, therefore low-noise performance
The content that necessary emphasis considers when being Centrifugal Pump Design.
General emphasis considers the efficiency of pump during current Centrifugal Pump Design, to reach the purpose for saving energy consumption, by excellent
Changing impeller, the geometrical structure parameter of spiral case enables centrifugal pump to reach highest operating efficiency；Low noise during Centrifugal Pump Design
In terms of active control, the geometric parameter that current research is also concentrated mainly on optimization impeller includes the number of blade, blade import and export peace
Angle, cornerite, vane type line etc. are put, so that centrifugal pump has relatively low vibration noise level.Another approach is by proposing one
The impellers of a little special constructions, spiral case are to reach Low Noise Design purpose；Its one kind proposed of such as Jiangsu University Yuan Shou has length
The centrifugal pump impeller of short blade structure, Yang Minguan proposes that a kind of centrifugal pump lateral wall type pressurized water chamber structure all has clear and definite low noise
Purpose of design；The stator-rotor interaction effect of impeller-cut water is the important sources for centrifuging pump noise, therefore shape, the angle of cut water will
Influence is produced on centrifugal pump vibration noise, but during Centrifugal Pump Design, the matching properties of cut water and impeller are then often neglected
Slightly.Therefore the present invention is from the matching properties of cut water and impeller are improved, by defining cut water angle, and itself and outlet blade angle
Relation so that reach low noise centrifugal pump design purpose.The present invention will provide new solution for the design of low noise centrifugal pump
Certainly approach.
The content of the invention
In order to reduce the vibration noise level of centrifugal pump, the present invention is led to from reduction impeller-cut water stator-rotor interaction effect
Improvement spiral case cut water angle and its matching relationship with outlet blade angle are crossed, so as to obtain a kind of centrifugation with low-noise characteristic
Pump, reduce further centrifugal pump vibration noise level.The volute structure is simple, reasonable, with characteristics, Ke Yiyou such as easy implementations
Effect weakens the percussion that impeller goes out flowing liquid and cut water, so as to further improve the vibration noise level of centrifugal pump.
The present invention proposes a kind of centrifugal pump with low-noise characteristic, including spiral case, it is characterised in that：The circle of spiral case cut water
The line in the circular arc center of circle and the angle of vertical direction of arc side midpoint and spiral case cut water are defined as cut water angle φ, the angle and blade
Angle of outlet β matching relationship has fairly obvious influence to the noiseproof feature of centrifugal pump, as φ=[(β -5 °) ~ (+5 ° of β)],
Centrifugal pump can obtain preferable low-noise performance, and centrifugal pump now is referred to as low noise centrifugal pump.
The spiral case and impeller are installed with one heart, spiral case inlet side diameter D2More than impeller outlet diameter D1, both ratio values
Scope is D2/D1=1.05~1.2；The line of cut water arc-shaped edges midpoint and impeller central point and the angle theta of horizontal direction be defined as every
Tongue laying angle, its span is 15 ° ~ 45 °；Outlet blade angle, the absolute fluid flow angle of impeller outlet
, the circumferential components of impeller outlet absolute velocity, impeller outlet axis plane velocity, impeller goes out
Mouth peripheral speed, n is the rotating speed of pump, and b is impeller outlet width, therefore outlet blade angle is by centrifugal pump impeller
Geometrical structure parameter and performance parameter are together decided on including flow, rotating speed and cut water laying angle.
It is an advantage of the invention that：From the effect of impact of reduction impeller outlet fluid and cut water, by improving cut water angle
With the matching relationship of outlet blade angle, enable fluid smoothly by cut water, and then weaken the percussion of fluid and cut water,
The purpose of reduction centrifugation pump noise is reached, the centrifugal pump of such a structure spiral case is low noise centrifugal pump.The present invention also has simultaneously
Simple and reasonable for structure, easy to process the advantages of.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the centrifugal pump axis projection with low-noise characteristic of the invention.
Fig. 2 is the centrifugal pump plane figure with low-noise characteristic of the invention.
1 is impeller in figure, and 2 be blade, and 3 be impeller outlet side, and 4 be spiral case, and 5 be spiral case inlet side, and 6 be cut water circular arc
Side, 7 be the midpoint of cut water arc-shaped edges, and 8 be the circular arc center of circle, and 9 be impeller central point.
Embodiment
Fig. 1 gives the centrifugal pump axis projection with low-noise characteristic of the present invention, as shown in Figure 1：Spiral case inlet
3 diameters when 5 diameters are more than impeller outlet, and D2/D1=1.12；The centrifugal pump plane with low-noise characteristic is given by Fig. 2
Perspective view, as seen from the figure：The midpoint 7 of cut water arc-shaped edges and the line of impeller central point 9 and the angle of horizontal direction are taken as 20 °.
Illustrate Centrifugal Pump in the computational methods of outlet blade angle, this example with reference to performance of centrifugal pump and geometric parameter
For Q=55m3/ h, rotating speed n=1450r/min, impeller outlet diameter D1=260mm, impeller outlet width is b=16mm, blade exit
Laying angle β2=30 °, cut water laying angle θ=20 °.
Calculating process is as follows：
Impeller outlet peripheral speed is：。
Impeller outlet axis plane velocity is：。
The circumferential components of impeller outlet absolute velocity are：。
The absolute fluid flow angle of impeller outlet is：。
Outlet blade angle：。
Therefore：φ=β±5°=11.2°~21.2°.
I.e.：When cut water angle is 11.2 ° ~ 21.2 °, the matching properties of spiral case and impeller are optimal, the vibration noise water of centrifugal pump
Flat relatively low, now spiral case has low-noise characteristic.
Theory analysis is thought：The fluid of centrifugal pump impeller outflow and the effect of impact of spiral case cut water are the weights of pump vibration noise
The vibration noise level of centrifugal pump can be effectively reduced by originating, therefore weakening the effect of impact；The present invention from optimization impeller
The angle for going out to flow fluid impact cut water is set out, and by improving the matching properties of impeller-spiral case, and then reaches the mesh of Low Noise Design
's.
Pass through numerical computations（CFD）Found after checking：Compared with the centrifugal pump of conventional design, adopt this method design
Centrifugal pump can be effectively reduced the pressure fluctuation level inside centrifugal pump, and amplitude of pressure fluctuation reduces 5-10%, so reduce from
The vibration noise energy of heart pump, therefore the centrifugal pump of such a structure proposed by the present invention has low-noise characteristic.
Claims (3)
1. a kind of centrifugal pump with low-noise characteristic, including spiral case, it is characterised in that：The arc-shaped edges midpoint of spiral case cut water and snail
The line in the circular arc center of circle and the angle of vertical direction of shell cut water are defined as cut water angle φ, the angle and blade exit angle beta
Noiseproof feature with relation pair centrifugal pump has fairly obvious influence, as φ=[(β -5 °) ~ (+5 ° of β)], and centrifugal pump can be with
Preferable low-noise performance is obtained, centrifugal pump now is referred to as low noise centrifugal pump.
2. a kind of centrifugal pump with low-noise characteristic according to claim 1, it is characterized in that：Spiral case inlet side diameter D2
More than impeller outlet diameter D1, both ratio spans are D2/D1=1.05~1.2。
3. a kind of centrifugal pump with low-noise characteristic according to claim 1, it is characterized in that：The outlet blade angle, the line of cut water arc-shaped edges midpoint and impeller central point and the angle theta of horizontal direction be defined as cut water laying angle, its
Span is 15 ° ~ 45 °；The absolute fluid flow angle of impeller outlet, the circumferential components of impeller outlet absolute velocity, impeller outlet axis plane velocity, impeller outlet peripheral speed, n is pump
Rotating speed, b is impeller outlet width；Q is flow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510749379.0A CN105332950B (en) | 2015-11-09 | 2015-11-09 | A kind of centrifugal pump with low-noise characteristic |
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| CN201510749379.0A CN105332950B (en) | 2015-11-09 | 2015-11-09 | A kind of centrifugal pump with low-noise characteristic |
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| Publication Number | Publication Date |
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| CN105332950A CN105332950A (en) | 2016-02-17 |
| CN105332950B true CN105332950B (en) | 2017-10-20 |
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| CN110017288A (en) * | 2019-05-15 | 2019-07-16 | 苏州玲珑汽车科技有限公司 | Electronic water pump for automobile |
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| BE796176A (en) * | 1973-03-02 | 1973-09-03 | Acec | HYDRAULIC ADAPTATION DEVICE TO THE OUTLET OF THE IMPELLER OF A CENTRIFUGAL PUMP |
| DE29723408U1 (en) * | 1997-04-10 | 1998-08-20 | Whirlpool Co | Circulating centrifugal pump for a dishwasher |
| CN1080837C (en) * | 1997-08-27 | 2002-03-13 | 赵廷舫 | Method for increasing pumping-effciency and reducing specific gravity |
| CN103423168B (en) * | 2013-07-24 | 2015-10-14 | 大连理工大学 | A kind of hydraulic model of AP1000 filter screen backwashing pump |
| CN103994102B (en) * | 2014-05-07 | 2016-08-24 | 江苏大学 | A kind of low specific-speed centrifugal pump spiral pressurized water chamber method for designing |
| CN104019056B (en) * | 2014-05-29 | 2016-05-25 | 江苏大学 | The hydraulic model method for designing of a kind of blade the is antecurvature circularly-supercharged pump of formula |
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