CN102518602B - Centrifugal fan impeller and centrifugal fan - Google Patents
Centrifugal fan impeller and centrifugal fan Download PDFInfo
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- CN102518602B CN102518602B CN201110451776.1A CN201110451776A CN102518602B CN 102518602 B CN102518602 B CN 102518602B CN 201110451776 A CN201110451776 A CN 201110451776A CN 102518602 B CN102518602 B CN 102518602B
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Abstract
The embodiment of the invention provides a centrifugal fan impeller and a centrifugal fan using the centrifugal fan impeller, wherein the centrifugal fan impeller comprises a hub, blades and a wheel cover, the blades are arranged between the hub and the wheel cover, the blades comprise backward long blades and backward short blades, the flow direction length of the long blades is greater than that of the short blades, the long blades and the short blades are alternately distributed between the hub and the wheel cover, and the inlet diameter of the short blades is equal to that of the long blades; the meridian flow passage molded line of the wheel cover is a curve with smooth transition between the inlet and the outlet of the long blade or the short blade. The invention solves the problem of noise caused by the structure of the impeller of the existing centrifugal fan.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to a kind of centrifugal blower fan blade wheel and centrifugal blower.
Background technique
Centrifugal blower is the mechanical energy relying on input, improve gas pressure to supply gas side by side the machinery of body, it is a kind of driven fluid machinery, impeller is the vitals of centrifugal blower, the working principle of centrifugal blower is the effect of gas by centrifugal force, suck via its impeller central position, then flow through between blade, thus flow out outward.
Impeller is made up of the several parts of wheel hub, blade and wheel cap usually, for sweeping machine, blade many employings number of blade of its centrifugal blower fan blade wheel used is the backward straight blade profile formula of 16, as shown in Figure 1, this blade structure, be difficult to the flow performance adapting to blower interior gas, the rigid impulse to blade of easy formation air-flow, and comparatively serious flow separation and the separation of flow can be formed, also comparatively Maelstrom can be formed in runner, during variable working condition, this eddy current is more violent, and the existence of eddy current makes the valid circulation area of passage narrow.This centrifugal blower inner large-scale vortex structure, shear flow, the separation of flow etc. cause using the equipment of this centrifugal blower as remarkable in the noise when operation such as sweeping machine, cause certain noise pollution to environment.
Summary of the invention
Embodiments provide a kind of centrifugal blower fan blade wheel and centrifugal blower, the noise problem that the structure in order to solve existing centrifugal blower fan blade wheel is brought.
Based on the problems referred to above, a kind of centrifugal blower fan blade wheel that the embodiment of the present invention provides, comprise: wheel hub, blade and wheel cap, described blades installation is between described wheel hub and described wheel cap, described blade comprises backward linear leaf and short blade, described linear leaf flow to that length is greater than described short blade flow to length, described linear leaf and described short blade are alternately distributed between described wheel hub and described wheel cap, and the inlet diameter of described short blade equals the inlet diameter of described linear leaf;
The meridional channel molded line of described wheel cap in the import of linear leaf or short blade to the curve between outlet being smooth transition.
Further, the outlet diameter D1 of described linear leaf and inlet diameter D3, and the outlet diameter D2 of described short blade and inlet diameter D3, meet following formula:
(D2-D3)/(D1-D3)＝1/3～1/2。
Further, the outlet diameter D1 of described linear leaf and inlet diameter D3 meets: D3/D1=0.35 ~ 0.55.
Further, the span of the outlet flow angle of described linear leaf is 35 ° ~ 45 °.
Further, described linear leaf and described short blade are evenly distributed between described wheel hub and described wheel cap.
Further, the quantity of described linear leaf and the quantity of described short blade are respectively in the span of 10 ~ 16.
Further, the blade profile of described linear leaf and/or short blade is one of following blade profile:
Circular arc type, straight line type, parabolic shape and hyperbolic-type.
Further, when the blade profile of described linear leaf and described short blade are circular arc type, the radius of arc R1 of described linear leaf and the radius of arc R2 of described short blade meets: R2/R1=0.95 ~ 1.05.
Further, the outlet diameter D1 of described linear leaf and the radius of arc R1 of described linear leaf meets: R1/D1=0.6 ~ 0.7.
Further, the meridional channel molded line of described wheel cap is parabola, and representation is as follows:
In above formula,
H
1for the entrance width of linear leaf, h
2for the exit width of linear leaf, D1 is the outlet diameter of linear leaf, and D3 is the inlet diameter of linear leaf.
The embodiment of the present invention additionally provides a kind of centrifugal blower, and this centrifugal blower comprises the above-mentioned centrifugal blower fan blade wheel that the embodiment of the present invention provides.
The beneficial effect of the embodiment of the present invention comprises:
The centrifugal blower fan blade wheel that the embodiment of the present invention provides and the centrifugal blower comprising this centrifugal blower fan blade wheel, adopt the blade of backward linear leaf and short blade two kinds of forms, and linear leaf and short blade are alternately distributed, the inlet diameter of short blade equals the inlet diameter of linear leaf, short blade is arranged at the inlet between two linear leafs, and the meridional channel molded line of wheel cap in the import of linear leaf and short blade to the curve between outlet being smooth transition, the short blade of inlet can not only be used to reach the effect of shunting, and the pressure pulse strength of inlet air flow can be reduced, the formation of blade passage back segment backflow whirlpool embryo is inhibit from source, the upward pressure pulsation of air-flow face is greatly weakened, thus reach significant noise reduction.
Further, the centrifugal blower fan blade wheel that the embodiment of the present invention provides all adopts circular arc type with the linear leaf of centrifugal blower and the blade profile of short blade comprising this centrifugal blower fan blade wheel, because circular arc type is relative better with centrifugal blower internal flow feature consistency, compared with prior art, further reduce air-flow to the rigid impulse of blade, reduce noise.
Accompanying drawing explanation
Fig. 1 is the structural representation of the blade of centrifugal blower fan blade wheel in prior art;
The overall structure schematic diagram of the centrifugal blower fan blade wheel that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the blade of the centrifugal blower fan blade wheel that Fig. 3 provides for the embodiment of the present invention;
The centrifugal fan impeller structure detailed schematic that Fig. 4 provides for the embodiment of the present invention;
The schematic diagram of the meridional channel molded line of the centrifugal blower fan blade wheel that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with Figure of description, a kind of centrifugal blower fan blade wheel provide the embodiment of the present invention and the embodiment of centrifugal blower are described.
The centrifugal blower fan blade wheel that the embodiment of the present invention provides, as shown in Figure 2, similarly to the prior art, comprise: wheel hub 1, blade 2 and the several part of wheel cap 3, blade 2 is installed between wheel hub 1 and wheel cap 3, difference is, the blade of the embodiment of the present invention to existing centrifugal blower fan blade wheel improves, the structural representation of the blade of the centrifugal blower fan blade wheel that the embodiment of the present invention that Fig. 3 is provides, as can be seen from Figure 3, the centrifugal blower fan blade wheel that the embodiment of the present invention provides provides the blade of two kinds of forms, namely backward linear leaf 4 and backward short blade 5, wherein:
(namely fluid is from the import distance that pass by surface to outlet along linear leaf for the length that flows to of linear leaf 4, if straight line type linear leaf, be approximately equal to linear leaf from import to outlet straight length, if curved linear leaf, be approximately equal to linear leaf from import to outlet the length of length of curve) be greater than short blade 5 flow to length (namely fluid from import to outlet along short blade surperficial distance of passing by, if straight line type short blade, be approximately equal to short blade from import to outlet straight length, if curved short blade, be approximately equal to short blade from import to outlet the length of length of curve),
Linear leaf 4 and short blade 5 are circumferentially alternately distributed between wheel hub and wheel cap, i.e. linear leaf-short blade-linear leaf-short blade-... distribution form.
The inlet diameter of short blade 5 equals the inlet diameter of linear leaf 4.
The meridional channel molded line of wheel cap in the import of linear leaf 4 or short blade 5 to the curve (not illustrating in Fig. 3) for smooth transition between outlet.
Below the concrete structure of the above-mentioned centrifugal blower fan blade wheel that the embodiment of the present invention provides is described in detail.
The centrifugal blower fan blade wheel that the embodiment of the present invention provides operationally, is rotated in a clockwise direction.
Fig. 4 is the CONSTRUCTED SPECIFICATION figure of the centrifugal blower fan blade wheel that the embodiment of the present invention provides, and as shown in Figure 4, the linear leaf 4 of the centrifugal blower fan blade wheel that the embodiment of the present invention provides and/or the blade profile of short blade 5 can be one of following blade profiles:
Circular arc type, straight line type, parabolic shape, hyperbolic-type and other common line styles etc.
Linear leaf 4 can be identical with the blade profile of short blade 5, also can be different, and the embodiment of the present invention does not limit this.
Fig. 4 only all adopts circular arc type for the blade profile of linear leaf 4 and short blade 5, and those skilled in the art on the basis of Fig. 4, can know the concrete structure that other common line styles are corresponding by inference.
Circular arc type is due to relative with centrifugal blower internal flow feature consistency better, and not easily produce separated vorticcs in centrifugal blower runner, therefore, in embodiments of the present invention, centrifugal blower fan blade wheel preferably adopts linear leaf and the short blade of circular arc type.
In the embodiment of the present invention, linear leaf 4 is identical with the inlet diameter of short blade 5, as shown in Figure 4, the outlet diameter of linear leaf 4 (namely the outlet edge of linear leaf is to the twice of the distance in centrifugal blower axle center) is D1, and inlet diameter (namely the import of linear leaf is to the twice of the distance in centrifugal blower axle center) is D3; The outlet diameter of short blade 5 (namely the outlet edge of short blade is to the twice of the distance in centrifugal blower axle center) is D2, and inlet diameter (namely the import of short blade is to the twice of the distance in centrifugal blower axle center) is D3.
Preferably, in the embodiment of the present invention, the outlet diameter D1 of linear leaf 4, the inlet diameter D3 of linear leaf 4, the outlet diameter D2 of short blade 5 and the inlet diameter D3 of short blade 5, meet following formula:
(D2-D3)/(D1-D3)＝1/3～1/2；
As can be seen from the above equation, short blade 5 flow to that length is approximately linear leaf 4 flow to 1/3 ~ 1/2 of length.
Further, for linear leaf 4, its outlet diameter D1 and inlet diameter D3 meets: D3/D1=0.35 ~ 0.55.
Preferably, as shown in Figure 4, the span of the outlet flow angle α of linear leaf 4 is 35 ° ~ 45 °.
Linear leaf 4 and short blade 5, between wheel hub and wheel cap, can be uniformly distributed, and also can adopt the form of non-uniform Distribution, preferably, as shown in Figure 4, adopt equally distributed form.
Preferably, in the embodiment of the present invention, the quantity of linear leaf 4 and short blade 5 is respectively in the scope of 10 ~ 16, and in other words, the blade amt amount of centrifugal blower fan blade wheel is in the scope of 20 ~ 32.
Preferably, when the linear leaf 4 of the centrifugal blower fan blade wheel that the embodiment of the present invention provides and the blade profile of short blade 5 all adopt circular arc type, the radius of arc R1 of the linear leaf 4 and radius of arc R2 of short blade 5 meets: R2/R1=0.95 ~ 1.05.
The outlet diameter D1 of the linear leaf 4 and radius of arc R1 of linear leaf 4 meets: R1/D1=0.6 ~ 0.7.
Shown in Fig. 5 is the schematic diagram of the meridional channel molded line of the centrifugal blower fan blade wheel that the embodiment of the present invention provides, in Fig. 5, the meridional channel molded line of wheel cap is S1, the meridional channel molded line of wheel hub is S2, it is linear leaf between S1 and S2, the axis of centrifugal blower is S3, the entrance width of linear leaf (or short blade) is h1, the exit width of linear leaf is h2, the outlet diameter D1 that R1 ' is linear leaf 1/2nd, R2 ' for linear leaf (or short blade) inlet diameter D3 1/2nd.
As can be seen from Figure 5, the meridional channel molded line of wheel cap to be S1 be between the import of linear leaf (or short blade) and outlet smooth curve, such design, air-flow is difficult to flow separation occurs on meridian plane, thus whirlpool embryo can be suppressed to produce from source, make to be weakened greatly in the pulsation of air-flow face upward pressure, thus reach good noise reduction.
Preferably, in the embodiment of the present invention, the meridional channel molded line of wheel cap adopts parabola, and this parabolical representation is as follows:
In above formula:
H
1for the entrance width of linear leaf, h
2for the exit width of linear leaf, D1 is the outlet diameter of linear leaf, and D3 is the inlet diameter of linear leaf.
Certainly, the meridional channel molded line of the wheel cap of the centrifugal blower fan blade wheel that the embodiment of the present invention provides, can also adopt other common curve shape, such as hyperbolas etc., the embodiment of the present invention does not limit this.
The embodiment of the present invention additionally provides a kind of centrifugal blower, and this centrifugal blower comprises the above-mentioned centrifugal blower fan blade wheel that the embodiment of the present invention provides.The centrifugal blower fan blade wheel that this centrifugal blower uses the embodiment of the present invention to provide is as its critical piece, and the structural relation of centrifugal blower fan blade wheel and miscellaneous part, with reference to the structural relation of impeller and miscellaneous part in existing centrifugal blower, can not repeat them here.
The centrifugal blower fan blade wheel that the embodiment of the present invention provides and the centrifugal blower comprising this centrifugal blower fan blade wheel, adopt the blade of backward linear leaf and short blade two kinds of forms, and linear leaf and short blade are alternately distributed, the inlet diameter of short blade equals the inlet diameter of linear leaf, short blade is arranged at the inlet between two linear leafs, and the meridional channel molded line of wheel cap in the import of linear leaf and short blade to the curve between outlet being smooth transition, the short blade of inlet can not only be used to reach the effect of shunting, and the pressure pulse strength of inlet air flow can be reduced, the formation of blade passage back segment backflow whirlpool embryo is inhibit from source, the upward pressure pulsation of air-flow face is greatly weakened, thus reach significant noise reduction.
Further, the centrifugal blower fan blade wheel that the embodiment of the present invention provides all adopts circular arc type with the linear leaf of centrifugal blower and the blade profile of short blade comprising this centrifugal blower fan blade wheel, because circular arc type is relative better with centrifugal blower internal flow feature consistency, compared with prior art, further reduce air-flow to the rigid impulse of blade, reduce noise.
By the verification experimental verification of preferred embodiment of the present invention, under equal conditions, the working-noise of the embodiment of the present invention can the centrifugal blower decline 4dB ~ 6dB of more existing use centrifugal blower fan blade wheel, and noise reduction is remarkable.Concrete test data is as following table 1:
Table 1
| Scheme | Working speed (rpm) | Noise (dB) |
| Existing scheme | 2200 | 86.6 |
| The scheme of the embodiment of the present invention | 2200 | 80.6 |
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (9)
1. a centrifugal blower fan blade wheel, comprise: wheel hub, blade and wheel cap, described blades installation is between described wheel hub and described wheel cap, it is characterized in that, described blade comprises backward linear leaf and short blade, described linear leaf flow to that length is greater than described short blade flow to length, described linear leaf and described short blade are circumferentially alternately distributed between described wheel hub and described wheel cap, and the inlet diameter of described short blade equals the inlet diameter of described linear leaf;
The outlet diameter D1 of described linear leaf and inlet diameter D3, and the outlet diameter D2 of described short blade and inlet diameter D3, meet following formula:
(D2-D3)/(D1-D3)＝1/3～1/2；
The meridional channel molded line of described wheel cap is parabola, and representation is as follows:
In above formula,
H
1for the entrance width of linear leaf, h
2for the exit width of linear leaf, D1 is the outlet diameter of linear leaf, and D3 is the inlet diameter of linear leaf.
2. centrifugal blower fan blade wheel as claimed in claim 1, is characterized in that, the outlet diameter D1 of described linear leaf and inlet diameter D3 meets: D3/D1=0.35 ~ 0.55.
3. centrifugal blower fan blade wheel as claimed in claim 1, it is characterized in that, the span of the outlet flow angle of described linear leaf is 35 ° ~ 45 °.
4. centrifugal blower fan blade wheel as claimed in claim 1, it is characterized in that, described linear leaf and described short blade are circumferentially evenly distributed between described wheel hub and described wheel cap.
5. the centrifugal blower fan blade wheel as described in any one of claim 1-4, is characterized in that, the quantity of described linear leaf and the quantity of described short blade are respectively in the span of 10 ~ 16.
6. the centrifugal blower fan blade wheel as described in any one of claim 1-4, is characterized in that, the blade profile of described linear leaf and/or short blade is one of following blade profile:
Circular arc type, straight line type, parabolic shape and hyperbolic-type.
7. centrifugal blower fan blade wheel as claimed in claim 6, is characterized in that, when the blade profile of described linear leaf and described short blade are circular arc type, the radius of arc R1 of described linear leaf and the radius of arc R2 of described short blade is satisfied: R2/R1=0.95 ~ 1.05.
8. centrifugal blower fan blade wheel as claimed in claim 7, is characterized in that, it is characterized in that, the outlet diameter D1 of described linear leaf and the radius of arc R1 of described linear leaf meets: R1/D1=0.6 ~ 0.7.
9. a centrifugal blower, is characterized in that, described centrifugal blower comprises the centrifugal blower fan blade wheel as described in any one of claim 1-8.
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| CN201110451776.1A CN102518602B (en) | 2011-12-29 | 2011-12-29 | Centrifugal fan impeller and centrifugal fan |
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| CN102518602B true CN102518602B (en) | 2014-12-24 |
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| CN104074797B (en) * | 2013-03-25 | 2017-05-24 | 华硕电脑股份有限公司 | Impeller and fan using it |
| CN104251230B (en) * | 2013-06-28 | 2016-09-14 | 苏州宝时得电动工具有限公司 | Receded disk impeller and include the suction and blowing device of this receded disk impeller |
| CN104033422B (en) * | 2014-06-12 | 2017-01-04 | 浙江理工大学 | A kind of small axial flow fan of band splitterr vanes |
| CN106368985A (en) * | 2016-11-23 | 2017-02-01 | 广东威灵电机制造有限公司 | Multi-stage flow guide device |
| CN108790794B (en) * | 2018-08-03 | 2023-05-12 | 泰豪科技股份有限公司 | Mobile power supply vehicle with split type water tank |
| CN108953223B (en) * | 2018-08-16 | 2021-02-12 | 泛仕达机电股份有限公司 | Centrifugal impeller |
| CN109681463A (en) * | 2018-12-11 | 2019-04-26 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of fluid-guiding type centrifugal impeller |
| GB2585936A (en) * | 2019-07-25 | 2021-01-27 | Edwards Ltd | Drag pump |
| CN111878425B (en) * | 2020-06-24 | 2022-06-17 | 华帝股份有限公司 | Impeller, fan and fan control method |
| CN113915146B (en) * | 2020-07-07 | 2023-04-11 | 华为技术有限公司 | Centrifugal fan and electronic equipment |
| CN113803273A (en) * | 2021-10-20 | 2021-12-17 | 江阴市新启点环境科技有限公司 | Alloy aluminum impeller with staggered blade distribution structure |
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| CN114087229B (en) * | 2021-11-15 | 2023-03-24 | 珠海格力电器股份有限公司 | Compression impeller and air cycle machine |
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