CN206636828U - A kind of small size mixed-flow impeller - Google Patents
A kind of small size mixed-flow impeller Download PDFInfo
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- CN206636828U CN206636828U CN201720167761.5U CN201720167761U CN206636828U CN 206636828 U CN206636828 U CN 206636828U CN 201720167761 U CN201720167761 U CN 201720167761U CN 206636828 U CN206636828 U CN 206636828U
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Abstract
The utility model discloses a kind of small size mixed-flow impeller, including：Impeller body and the N number of impeller blade being arranged on impeller body, the step through hole for being used for installing rotary shaft is provided with impeller body, offset distance Δ d is provided between the extended line of impeller blade leading edge mid-depth line and the planar central of impeller body, Δ d/D1 ratio ranges are between 0.05 to 0.1, wherein D1 is impeller inlet diameter, meanwhile blade-root molded line S1 and Ye Gao the molded line S2 of impeller blade is three rank Beziers in the projection using rotary shaft as the plane of normal.A kind of small size mixed-flow impeller of the utility model is simple in construction, is easy to injection to mold, and improves production efficiency, has condition of high vacuum degree and the aeroperformance of high static pressure efficiency, and noise level is relatively low, suitable for all kinds of small portable formula motors.
Description
Technical field
It the utility model is related to a kind of small size mixed-flow impeller applied on motor of dust collector fan.
Background technology
For dust catcher alternating current generator fan, its running speed is typically at 10,000 to 40,000 rpms.It is straight for dust catcher
Brushless motor fan is flowed, for its running speed between 40,000 to 100,000 turns, the latter in the industry more uses centrifugal metallic impeller (such as
Shown in Fig. 1), blade and upper and lower cover plates stamping riveting.But this receded disk impeller dynamic balance grade is not high, more difficult under high rotating speed to do
To G2.0, and the build-up member of receded disk impeller is more, it is necessary to nut, pad etc part is fixed, so add plus
Work manufacturing cost.
And integral type injection centrifugal impeller uses ultrasonic to weld because of it, overall construction intensity is poor, it is impossible to transports
Row is in the case of superfast.
Therefore it is a kind of simple in construction, a kind of small size mixed-flow impeller of high-efficient low-noise urgently proposes.
Utility model content
In order to solve the above-mentioned technical problem, the utility model proposes a kind of small size mixed-flow impeller, the blade wheel structure
Simply, it is easy to injection to mold, improves production efficiency, there is condition of high vacuum degree and the aeroperformance of high static pressure efficiency, and noise level
It is relatively low, suitable for all kinds of small portable formula motors.
In order to achieve the above object, the technical solution of the utility model is as follows：
A kind of small size mixed-flow impeller, including：Impeller body and the N number of impeller blade being arranged on impeller body,
The step through hole for being used for installing rotary shaft, the extended line and leaf of impeller blade leading edge mid-depth line are provided with impeller body
Offset distance Δ d is provided between the planar central of wheel body, for Δ d/D1 ratio ranges between 0.05 to 0.1, wherein D1 is leaf
Take turns inlet diameter.
A kind of impeller blade leading edge of small size mixed-flow impeller of the utility model is designed using centering type so that before impeller
The linear velocity nonlinear change of edge, enhance the Three-dimensional Flow of blade inlet edge.And the axial direction of impeller become a mandarin it is generally non-
Uniformly, certain non axial speed be present, especially in dust catcher complete machine.This feature is become a mandarin to suppressing blade inlet edge for complexity
The possibility of separation has more preferable effect.
On the basis of above-mentioned technical proposal, following improvement can be also done：
As preferable scheme, blade-root molded line S1 and Ye Gao the molded line S2 of impeller blade is in the plane using rotary shaft as normal
Projection be three rank Beziers.
Be S01 after blade-root molded line S1 projections using above-mentioned preferable scheme, be S02 after the high molded line S2 projections of leaf, S01 with
S types are presented in S02, and S01 and S02 are diametrically gradually drawn close, and after 1/2 impeller outlet diameter D2, two molded line are put down substantially
OK so that impeller blade back section approaches and plane blade.The surface of impeller blade is smooth and regular, can reduce flowing point
From the aeroperformance with condition of high vacuum degree and high static pressure efficiency.
As preferable scheme, impeller blade leading edge top is provided with rounded corner, and the chamfering radius of the rounded corner is R1, R1/
D1 ratio ranges are between 0.01 to 0.02.
Using above-mentioned preferable scheme, rounding, which designs, causes the injection depanning of impeller slide block type to be easier, and is unlikely to influence
Impeller adiabatic efficiency.
As preferable scheme, impeller blade trailing edge top is provided with rounded corner, and the chamfering radius of the rounded corner is R2, R2/
For D2 ratio ranges between 0.01 to 0.03, wherein D2 is impeller outlet diameter.
Using above-mentioned preferable scheme, rounding, which designs, causes the injection depanning of impeller slide block type to be easier, and is unlikely to influence
Impeller adiabatic efficiency.
As preferable scheme, glue overflow prevention grooves are provided with the top of step through hole, the groove depths of glue overflow prevention grooves is L, and L/H
For ratio range between 0.01 to 0.02, wherein H is the height of impeller body.
Using above-mentioned preferable scheme, glue overflow prevention grooves are left on the top of through hole, the glue that annular is entered after glue in injection moulding process
Body overflows, and will not protrude glue overflow prevention grooves 4 at the top of rotary shaft in the assembling in impeller later stage in addition, can also make part glue adhesion herein
Place, adds rotary shaft and the tightness of impeller.
As preferable scheme, impeller blade is space S type, and impeller blade trailing edge is inclined plane, swings to impeller body rotation
Turn the side in direction.
Using above-mentioned preferable scheme, the shape of impeller blade has condition of high vacuum degree and high static pressure efficiency into streamlined
Aeroperformance, and relatively low noise level.
As preferable scheme, the angle of impeller blade and the rotary shaft being installed in step through holeScope exist
Between 75 ° to 85 °.
Using above-mentioned preferable scheme, the adjacent wall pressure fluctuations of blade exit can be reduced, help to reduce blower fan gas
Dynamic noise.
As preferable scheme, N is prime number.
Using above-mentioned preferable scheme, the impeller blade of prime number reduces the possibility of impeller and stator induced resonance.
Brief description of the drawings
Fig. 1 is the receded disk impeller that prior art provides.
Fig. 2 is one of top view of small size mixed-flow impeller that the utility model embodiment provides.
Fig. 3 is the top view for the conventional turbine impeller that prior art provides.
Fig. 4 is the stereogram for the small size mixed-flow impeller that the utility model embodiment provides.
Fig. 5 is the two of the top view for the small size mixed-flow impeller that the utility model embodiment provides.
Fig. 6 is the rank Bezier schematic diagram of plane three that the utility model embodiment provides.
Fig. 7 is the front view for the small size mixed-flow impeller that the utility model embodiment provides.
Fig. 8 is A-A sectional views in Fig. 2.
Fig. 9 is the motor overall efficiency and power input to machine test chart that the utility model embodiment provides.
Wherein：1 impeller body, 2 impeller blades, 3 step through holes, 4 glue overflow prevention grooves.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with the accompanying drawings.
In order to reach the purpose of this utility model, in a kind of some of embodiments of small size mixed-flow impeller,
A kind of small size mixed-flow impeller, including：Impeller body 1 and five impeller leaves being arranged on impeller body 1
Piece 2, the through hole 3 for being used for installing rotary shaft is provided with impeller body 1.
The quantity of impeller blade 2 is five, and the less number of blade causes slide block type demoulding manufacture to be more prone to, and impeller is made an uproar
Sound is lower, and processing technology is simpler, and prime number blade reduces the quantity of induced resonance Frequency point between blade and stator.
As shown in Fig. 2 set between the extended line of the leading edge mid-depth line of impeller blade 2 and the planar central of impeller body 1
Distance, delta d is offset, for Δ d/D1 ratio ranges between 0.05 to 0.1, wherein D1 is impeller inlet diameter.And conventional turbine leaf
The Δ d=0 of wheel, as shown in Figure 3.
A kind of impeller blade leading edge of small size mixed-flow impeller of the utility model is designed using centering type so that before impeller
The three-dimensional that edge may preferably tackle complexity enters stream, reduces leading edge flow separation.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, blade-root molded line S1 and Ye Gao the molded line S2 of impeller blade 2 is using rotary shaft as the plane of normal
Projection is three rank Beziers.As shown in figure 4, the junction of impeller blade 2 and impeller body 1 is root, impeller blade
Pressure face is formed by 4 sections of curve sweepings, respectively the high molded line S2 of blade-root molded line S1, leaf, blade inlet edge molded line LE (straightway) leaf
Piece trailing edge molded line TE (straightway).In order to preferably observe four molded line, four leading edges of impeller blade 2 and trailing edge in Fig. 4
Top has carried out rounding design, a leading edge of impeller blade 2 and trailing edge top do not carry out rounding also, to distinguish other roundings
Impeller blade 2,4 sections of curves of the impeller blade 2 of non-rounding are broken line representation.
As shown in figure 5, the high molded line S2 of blade-root molded line S1, leaf is three rank shellfishes in the projection using rotary shaft as the plane of normal
Sai Er curves.It is S01 after blade-root molded line S1 projections, is that S types, S01 and S02 is presented in S02, S01 and S02 after the high molded line S2 projections of leaf
Diametrically gradually draw close, after 1/2 impeller outlet diameter D2, two molded line are substantially parallel so that impeller blade back
Section approaches and plane blade.
Bezier is the basic tool of computer graphic image moulding, is that fundamental line with the most use is transported in figure moulding
One of bar, it is usually used in the fitting of smooth curve.The rank Bezier of plane three formed in Fig. 6 for tetra- points of P0, P1, P2, P3,
The parametric form of curve is：
B (t)=P0(1-t)3+3P1t(1-t)2+3P2t2(1-t)+P3t3, t ∈ [0,1]
P0, P1, P2, P3 in above formula, X-coordinate corresponding to 4 points, or Y-coordinate can be replaced with simultaneously.
The surface of impeller blade 2 is smooth and regular, can reduce flow separation, has condition of high vacuum degree and the gas of high static pressure efficiency
Dynamic performance.
As shown in fig. 7, in order to further optimize implementation result of the present utility model, in other embodiment,
Remaining feature technology is identical, and difference is, the leading edge top of impeller blade 2 is provided with rounded corner, the chamfering radius of the rounded corner
For R1, R1/D1 ratio ranges are between 0.01 to 0.02.
The trailing edge top of impeller blade 2 is provided with rounded corner, and the chamfering radius of the rounded corner is R2, and R2/D2 ratio ranges exist
Between 0.01 to 0.03, wherein D2 is impeller outlet diameter.
Rounding, which designs, causes the injection depanning of impeller slide block type to be easier, and is unlikely to influence impeller adiabatic efficiency.
As shown in figure 8, in order to further optimize implementation result of the present utility model, in other embodiment,
Remaining feature technology is identical, and difference is, glue overflow prevention grooves 4 are provided with the top of step through hole 3.The groove of glue overflow prevention grooves 4
Depth is L, and L/H ratio ranges, between 0.01 to 0.02, wherein H is the height of impeller body 2.Glue overflow prevention grooves 4 prevent note
The colloid spilling that annular is entered after glue during modeling, will not protrude glue overflow prevention grooves 4 in the assembling in impeller later stage at the top of rotary shaft in addition,
Also part glue adhesion can be made here, add rotary shaft and the tightness of impeller.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, impeller blade 2 is space S type, and the trailing edge of impeller blade 2 is inclined plane, swings to impeller body 1
The side of direction of rotation.The angle of impeller blade 2 and the rotary shaft being installed in step through hole 3Scope at 75 ° to 85 °
Between, the adjacent wall pressure fluctuations of blade exit can be reduced, help to reduce aerodynamic noise
A kind of small size mixed-flow impeller of the utility model includes impeller body 1 and impeller blade 2, the leading edge of impeller blade 2
Designed using non-centering type, blade inlet edge and trailing edge have demoulding rounding.
A kind of small size mixed-flow impeller of the utility model has the beneficial effect that：
First, the impeller size is minimum, and impeller maximum gauge is respectively less than 40mm, suitable for all kinds of small portable formula formula motors
Using.
Second, aerodynamics simu1ation design of the impeller based on Fluid Mechanics Computation, there is condition of high vacuum degree and the gas of high static pressure efficiency
Dynamic performance, and noise level is relatively low.As shown in figure 9, applied using the mixed flow fan of the utility model in a brush DC
On motor, based on IEC60312 testing standards, when motor maximal input is 350W, its highest motor complete machine effect is measured
Rate about 52%, and under standard-sized sheet orifice plate, Noisy acoustic power is less than 91dBA.
3rd, impeller blade number is 5, and the number of blade is less, is easy to the slide block type demoulding, and impeller leaves glue overflow prevention grooves 4, impeller
Depanning impulse- free robustness.Integral type depanning make it that impeller original unbalance is smaller, and prototyping testing average level is in below 20mg.
4th, impeller used win to coordinate with rotary shaft assembling, and there is glue bonding centre, and no screw cap type is fixed, and reduced dress
Match somebody with somebody, member-retaining portion glue when glue overflow prevention grooves 4 assemble so that impeller is bonding with rotary shaft more firm.
The above is only preferred embodiment of the present utility model, it is noted that for one of ordinary skill in the art
For, on the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these belong to this
The protection domain of utility model.
Claims (8)
1. a kind of small size mixed-flow impeller, including：Impeller body and the N number of impeller leaf being arranged on the impeller body
Piece, the step through hole for being used for installing rotary shaft is provided with the impeller body, it is characterised in that the impeller blade leading edge
Offset distance Δ d is provided between the extended line of mid-depth line and the planar central of impeller body, Δ d/D1 ratio ranges exist
Between 0.05 to 0.1, wherein D1 is impeller inlet diameter.
2. small size mixed-flow impeller according to claim 1, it is characterised in that the blade-root molded line S1 of the impeller blade
In the projection using rotary shaft as the plane of normal it is three rank Beziers with the high molded line S2 of leaf.
3. small size mixed-flow impeller according to claim 1 or 2, it is characterised in that the impeller blade leading edge top
Provided with rounded corner, the chamfering radius of the rounded corner is R1, and R1/D1 ratio ranges are between 0.01 to 0.02.
4. small size mixed-flow impeller according to claim 3, it is characterised in that the impeller blade trailing edge top is provided with
Rounded corner, the chamfering radius of the rounded corner is R2, and for R2/D2 ratio ranges between 0.01 to 0.03, wherein D2 is impeller outlet
Diameter.
5. small size mixed-flow impeller according to claim 4, it is characterised in that set at the top of the step through hole
There are glue overflow prevention grooves, the groove depth of the glue overflow prevention grooves is L, and L/H ratio ranges, between 0.01 to 0.02, wherein H is impeller sheet
The height of body.
6. small size mixed-flow impeller according to claim 5, it is characterised in that the impeller blade is space S type, institute
It is inclined plane to state impeller blade trailing edge, swings to the side of the impeller body direction of rotation.
7. small size mixed-flow impeller according to claim 6, it is characterised in that the impeller blade is described with being installed on
The angle of rotary shaft in step through holeScope between 75 ° to 85 °.
8. small size mixed-flow impeller according to claim 7, it is characterised in that N is prime number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720167761.5U CN206636828U (en) | 2017-02-23 | 2017-02-23 | A kind of small size mixed-flow impeller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720167761.5U CN206636828U (en) | 2017-02-23 | 2017-02-23 | A kind of small size mixed-flow impeller |
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| CN206636828U true CN206636828U (en) | 2017-11-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005950A (en) * | 2018-01-30 | 2018-05-08 | 清华大学 | The impeller and its design method of vane-type oil-gas mixing pump |
| CN110566514A (en) * | 2019-10-25 | 2019-12-13 | 重庆通用工业(集团)有限责任公司 | Noise reduction blade structure of centrifugal compressor |
| CN111594483A (en) * | 2019-02-21 | 2020-08-28 | 爱三工业株式会社 | Centrifugal pump |
| CN114962322A (en) * | 2022-05-24 | 2022-08-30 | 威灵（芜湖）电机制造有限公司 | Impeller structure, fan and domestic appliance |
-
2017
- 2017-02-23 CN CN201720167761.5U patent/CN206636828U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005950A (en) * | 2018-01-30 | 2018-05-08 | 清华大学 | The impeller and its design method of vane-type oil-gas mixing pump |
| CN108005950B (en) * | 2018-01-30 | 2024-04-09 | 清华大学 | Impeller of vane type oil-gas mixed transportation pump and design method thereof |
| CN111594483A (en) * | 2019-02-21 | 2020-08-28 | 爱三工业株式会社 | Centrifugal pump |
| CN110566514A (en) * | 2019-10-25 | 2019-12-13 | 重庆通用工业(集团)有限责任公司 | Noise reduction blade structure of centrifugal compressor |
| CN114962322A (en) * | 2022-05-24 | 2022-08-30 | 威灵（芜湖）电机制造有限公司 | Impeller structure, fan and domestic appliance |
| CN114962322B (en) * | 2022-05-24 | 2023-09-26 | 威灵（芜湖）电机制造有限公司 | Impeller structure, fan and household appliance |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215000 No. 15, linbu street, Weiting street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Xingdesheng Technology (Suzhou) Co., Ltd Address before: 215000 No. 15, linbu street, Weiting street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: Suzhou Industrial Park xingdesheng Motor Co., Ltd |
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| CP01 | Change in the name or title of a patent holder |