CN103062112B - Road cleaning equipment and centrifugal blower fan blade wheel thereof - Google Patents
Road cleaning equipment and centrifugal blower fan blade wheel thereof Download PDFInfo
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- CN103062112B CN103062112B CN201310009047.XA CN201310009047A CN103062112B CN 103062112 B CN103062112 B CN 103062112B CN 201310009047 A CN201310009047 A CN 201310009047A CN 103062112 B CN103062112 B CN 103062112B
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Abstract
The invention discloses a kind of centrifugal blower fan blade wheel and a kind of road cleaning equipment with this centrifugal blower fan blade wheel, described centrifugal blower fan blade wheel includes wheel disc (3) and the circumferentially blade on described wheel disc (3), wherein, described blade includes linear leaf (1), on from the center of described wheel disc (3) to the direction at the edge of described wheel disc (3), described linear leaf (1) includes the first segmental arc (4) and the second segmental arc (5) successively, described linear leaf (1) is forward direction type blade described first segmental arc (4), it is backward type blade described second segmental arc (5).Described centrifugal blower fan blade wheel aeroperformance is good and noise is low, and after using described centrifugal blower fan blade wheel, described road cleaning equipment cleaning ability and properties of product are better.
Description
Technical field
The present invention relates to blower fan field, in particular it relates to a kind of centrifugal blower fan blade wheel and a kind of road cleaning equipment with this centrifugal blower fan blade wheel.
Background technology
In existing road cleaning equipment, centrifugal blower adopts impeller as shown in Figure 1 mostly, impeller Leaf is backward type blade, and the meridian molded line of blade is straight line or circular arc, this impeller easily produces eddy current in use and hinders flowing, produces flow separation, and the air inlet place particularly in blade forms bigger whirlpool and significantly pressure fluctuation, when variable working condition, eddy current is more violent, and eddy current is the main cause that blower fan produces aerodynamic noise and reduction flow.
Summary of the invention
It is an object of the invention to provide a kind of centrifugal blower fan blade wheel and a kind of road cleaning equipment with this centrifugal blower fan blade wheel, described centrifugal blower fan blade wheel aeroperformance is good and noise is little.
To achieve these goals, the present invention provides a kind of centrifugal blower fan blade wheel, this centrifugal blower fan blade wheel includes wheel disc and the circumferentially blade on described wheel disc, wherein, described blade includes linear leaf, and on from the center of described wheel disc to the direction at the edge of described wheel disc, described linear leaf includes the first segmental arc and the second segmental arc successively, described linear leaf is forward direction type blade at described first segmental arc, is backward type blade at described second segmental arc.
Preferably, center line of blade profile respectively circular arc at described second segmental arc place of the described linear leaf center line of blade profile at described first segmental arc place and described linear leaf and tangent to each other be connected, the described linear leaf center line of blade profile at described first segmental arc place and described linear leaf are 0.4 ~ 0.6 at the ratio of the radius of curvature of the center line of blade profile at described second segmental arc place.
Preferably, the outlet diameter of described linear leaf is D1, inlet diameter is D2, first segmental arc of described linear leaf and the junction point of the second segmental arc are D3 to the twice of the distance at the center of described wheel disc, then the ratio of D2:D3:D1 is 1:1.46 ~ 1.57:2.17 ~ 2.36.
Preferably, the inlet air flow angle of described linear leaf is 27 ° ~ 33 °.
Preferably, the outlet flow angle of described linear leaf is 35 ° ~ 45 °.
Preferably, described blade also includes the short blade than described linear leaf with less development length, and described short blade is described in adjacent two panels between linear leaf, and described short blade arranges near the outlet side of described linear leaf and is backward type blade.
Preferably, the development length of described short blade is the 1/3 ~ 1/2 of the development length of described linear leaf.
Preferably, described short blade is identical with the shape and size of described second segmental arc, and described short blade is arranged on the centre of adjacent two described linear leafs.
Preferably, described centrifugal blower fan blade wheel includes 8 ~ 16 described linear leafs, and is provided with a described short blade between the adjacent described linear leaf of each two.
The present invention also provides for a kind of road cleaning equipment, and this road cleaning equipment includes centrifugal blower, and described centrifugal blower includes above-mentioned centrifugal blower fan blade wheel.
nullIn the centrifugal blower fan blade wheel of the present invention, linear leaf includes the first segmental arc and the second segmental arc，And linear leaf is forward direction type blade at the first segmental arc，Linear leaf is backward type blade at the second segmental arc，Forward direction type blade is strong to air-flow acting ability，Higher air pressure can be produced，Backward type blade is conducive to the flowing of air-flow，Make it possible to produce bigger flow and noise can be reduced，The centrifugal blower fan blade wheel of the present invention is in use，Air-flow is first subjected to the effect of the first segmental arc from air inlet after entering，Air-flow is done work by force by the first arc，The kinetic energy and the pressure that make air-flow increase，Then air-flow arrives the second segmental arc along linear leaf and flows out blade passage by the second segmental arc water conservancy diversion，Air current flow is smooth and easy、Suppress the generation of eddy current thus being effectively improved flow efficiency and reducing pressure fluctuation，Improve the pneumatic efficiency of blower fan and reduce noise，Increase the height-rise pressure of blower fan simultaneously.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below.In the accompanying drawings:
Fig. 1 is the structural representation of the centrifugal blower fan blade wheel according to prior art；
Fig. 2 is the structural representation of the centrifugal blower fan blade wheel according to the present invention；
Fig. 3 is the partial enlarged drawing of the centrifugal blower fan blade wheel in Fig. 2.
Description of reference numerals
1 linear leaf 2 short blade 3 wheel disc
4 first segmental arc 5 second segmental arcs
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
The embodiment provides a kind of centrifugal blower fan blade wheel, with reference to shown in Fig. 2, this centrifugal blower fan blade wheel includes wheel disc 3 and the circumferentially blade on wheel disc 3, and described blade edge extends from the center of wheel disc 3 to the direction at the edge of wheel disc 3.Wherein, described blade includes linear leaf 1, and on from the center of wheel disc 3 to the direction at the edge of wheel disc 3, linear leaf 1 includes the first segmental arc 4 and the second segmental arc 5 successively, linear leaf 1 is forward direction type blade at the first segmental arc 4, is backward type blade at the second segmental arc 5.
Specifically, in the impeller shown in Fig. 3, impeller is rotated clockwise, the tangential direction of the center line of blade profile at the first segmental arc 4 place of linear leaf 1 (blade along the centrage in grain direction cross section) and the reciprocal angle of impeller circumferential speed are more than 90 °, it is forward direction type blade, the tangential direction of center line of blade profile at the second segmental arc 5 place of linear leaf 1 and the reciprocal angle of impeller circumferential speed, less than 90 °, are backward type blade.nullIn this case，Owing to forward direction type blade is strong to air-flow acting ability，Higher air pressure can be produced，And backward type blade is conducive to the flowing of air-flow，Make it possible to produce bigger flow and noise can be reduced，The centrifugal blower fan blade wheel of the present embodiment is in conjunction with both advantages，Operationally，Air-flow is first subjected to the effect of the first segmental arc 4 of linear leaf 1 after entering the impeller of centrifugal blower from the air inlet (being positioned at the proximal part of wheel disc 3) of impeller，Air-flow is done work by force by the first arc 4，Air-flow is made to obtain certain kinetic energy and pressure，Then air-flow arrives the second segmental arc 5 along linear leaf，By the second segmental arc 5, the air-flow with bigger kinetic energy and pressure is carried out water conservancy diversion make it have good mobile performance and finally flow out blade passage，Guide functions by the second segmental arc 5 of backward type，Effectively suppress the generation of eddy current、Make air current flow more smooth and easy thus being effectively improved flow efficiency and reducing pressure fluctuation，Improve the pneumatic efficiency of blower fan and reduce noise，Be conducive to improving blower press liter simultaneously.
Preferably, the center line of blade profile at the first segmental arc 4 place of linear leaf 1 and the center line of blade profile respectively circular arc at the second segmental arc 5 place and tangent to each other be connected, the ratio of the center line of blade profile at the first segmental arc 4 place of linear leaf 1 and the radius of curvature of the center line of blade profile at the second segmental arc 5 place of linear leaf 1 is 0.4 ~ 0.6.For flowing to the second segmental arc 5 from the first segmental arc 4 with making airflow smooth, the linear leaf 1 center line of blade profile at the first segmental arc 4 place and the center line of blade profile respectively circular arc at the second segmental arc 5 place and tangent to each other be connected, again due to the degree of crook at the degree of crook of the first segmental arc 4 of linear leaf 1 and the second segmental arc 5 place of linear leaf 1 to the pressure of air-flow and mobility important, thus, by by the Ratio control of the radius of curvature of the center line of blade profile of the center line of blade profile at the first segmental arc 4 place of linear leaf 1 and the second segmental arc 5 place in appropriate scope (i.e. the scope of above-mentioned 0.4 ~ 0.6), linear leaf 1 is made to get up steam and ensure that air current flow these two aspects reaches the state relatively balanced, not only air pressure can be increased to suitable size but also air current flow efficiency can be effectively ensured.
Further preferably, the outlet diameter of linear leaf 1 is D1, inlet diameter is D2, first segmental arc 4 of linear leaf 1 and the junction point of the second segmental arc 5 are D3 to the twice of the distance at the center of wheel disc 3, then the ratio of D2:D3:D1 is 1:1.46 ~ 1.57:2.17 ~ 2.36.Referring to Fig. 3, the outlet diameter D1 of linear leaf 1 refers to the outlet edge twice to the distance at the center of wheel disc 3 of linear leaf 1, the inlet diameter D2 of linear leaf 1 refers to the ingress edge twice to the distance at the center of wheel disc 3 of linear leaf 1, under these conditions, linear leaf 1 has the first segmental arc 4 of applicable development length and linear leaf 1 and the second segmental arc 5 to have applicable development length ratio relative to air inlet, to optimize the shape of linear leaf 1 further, the combination property making the air pressure of centrifugal blower fan blade wheel and flow efficiency is better.Preferentially, D1 is 500mm ~ 520mm, D2 be 220mm ~ 230mm, D3 is 335mm ~ 345mm.
Specifically, the inlet air flow angle (being expressed as β in Fig. 3) of linear leaf 1 is 27 ° ~ 33 °.Referring to Fig. 3, the inlet air flow angle β of linear leaf 1 refer to linear leaf 1 at the tangent line of the end of air inlet and linear leaf 1 angle between the tangent line of the place, one end of air inlet circle.In centrifugal blower operation process, at air inlet place, air-flow is subject to blade effect can produce bigger eddy current thus there is significantly pressure fluctuation, if inlet air flow angle β is arranged in above-mentioned scope, then can guarantee that the air-flow flowed into from air inlet can flow into along with linear leaf 1 near the direction that the tangent line of air inlet end is consistent, namely it is effectively ensured air-flow to flow into smoothly in blade passage along the direction of linear leaf 1, thus greatly reducing the generation of air inlet place eddy current, make in the smooth and easy entrance blower fan of external air flow, it is effectively improved the aeroperformance of blower fan to a certain extent.
Further, the outlet flow angle (being expressed as α in Fig. 3) of linear leaf 1 is 35 ° ~ 45 °.Referring to Fig. 3, the outlet flow angle α of linear leaf 1 refer to linear leaf 1 at the tangent line of the end away from air inlet and linear leaf 1 angle between the tangent line away from place, one end circle of air inlet.Outlet flow angle α is so set and can effectively reduce linear leaf 1 interference to air-flow in the one end away from air inlet, it is to avoid runner separates the generation in whirlpool, flows out from blade passage with making airflow smooth, reach improve air-flow velocity and reduce the effect of noise.
Furthermore it is preferred that in situation, described blade also includes the short blade 2 than linear leaf 1 with less development length, short blade 2 is between adjacent two panels linear leaf 1, and short blade 2 arranges near the outlet side of linear leaf 1 and is backward type blade.After short blade 2 is set, air-flow stream to linear leaf 1 by import and export side time be susceptible to flow separation, namely in the outlet section side near linear leaf 1, air-flow is cut by short blade 2, eddy current is suppressed to produce, so that it is guaranteed that air-flow is full of wheel space equably, current stabilization diffusion, reduces eddy current loss, reduce pressure fluctuation and reduce noise.
Wherein, the development length of short blade 2 can be the 1/3 ~ 1/2 of the development length of linear leaf 1, so that this short blade 2 avoids the first segmental arc 4 to linear leaf 1 that the pressurized effect of air-flow is produced interference while playing steady flow result.
Further, specifically, as shown in Figures 2 and 3, in this embodiment, short blade 2 is identical with the shape and size of the second segmental arc 5 of linear leaf 1, and short blade 2 is arranged on the centre of adjacent two linear leafs 1.
In addition, in the centrifugal blower fan blade wheel of above-mentioned embodiment, centrifugal blower fan blade wheel preferably includes 8-16 linear leaf 1, and is provided with a short blade 2 between the adjacent linear leaf 1 of each two, in this case, noise during centrifugal blower fan blade wheel operating can be reduced in less scope.
Detailed description of the invention shown in Fig. 2 and Fig. 3, finds that after CFD analog simulation in runner, eddy current produces to greatly reduce, and air-flow smooth and easy can flow through runner, noise is little and is obtained in that bigger total head liter by being rear impeller to the blade design of impeller.
The negative-pressure type road cleaning equipment such as such as sweeping machine, blower fan is the core component of equipment, produce negative-pressure pneumatic transport model by blower fan and complete road cleaning, the performance quality of blower fan directly affects the work efficiency of road cleaning equipment and includes the properties of product such as noise, energy consumption, owing to producing substantial amounts of eddy current in runner, hindering the smooth outflow of air-flow to cause the increase of energy consumption and noise in the draught fan impeller that such as blade is backward type blade adopted in existing road cleaning equipment.
Thus, the present invention also provides for a kind of road cleaning equipment, and this road cleaning equipment includes centrifugal blower, and described centrifugal blower includes the centrifugal blower fan blade wheel according to the present invention.After adopting described centrifugal blower fan blade wheel, air-flow being obtained in that bigger pressure, increasing the height-rise pressure of centrifugal blower thus improving the cleaning ability of road cleaning equipment, and airflow smooth flows through blade passage, suppress eddy current to produce, pressure fluctuation reduces, make energy consumption and the lower noise of described road cleaning equipment, to sum up, according to the road cleaning equipment of the present invention owing to using the centrifugal blower fan blade wheel with efficient, energy-conservation and low noise advantage of the present invention and making work efficiency and properties of product all be improved.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing; but; the present invention is not limited to the detail in above-mentioned embodiment; in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
- null1. a centrifugal blower fan blade wheel，This centrifugal blower fan blade wheel includes wheel disc (3) and the circumferentially blade on described wheel disc (3)，It is characterized in that，Described blade includes linear leaf (1)，On from the center of described wheel disc (3) to the direction at the edge of described wheel disc (3)，Described linear leaf (1) includes the first segmental arc (4) and the second segmental arc (5) successively，Described linear leaf (1) is forward direction type blade described first segmental arc (4)，It is backward type blade described second segmental arc (5)，Center line of blade profile respectively circular arc at described second segmental arc (5) place of the described linear leaf (1) center line of blade profile at described first segmental arc (4) place and described linear leaf (1) and tangent to each other be connected，The described linear leaf (1) center line of blade profile at described first segmental arc (4) place and described linear leaf (1) are 0.4～0.6 at the ratio of the radius of curvature of the center line of blade profile at described second segmental arc (5) place.
- 2. centrifugal blower fan blade wheel according to claim 1, wherein, the outlet diameter of described linear leaf (1) is D1, inlet diameter is D2, first segmental arc (4) of described linear leaf (1) and the junction point of the second segmental arc (5) are D3 to the twice of the distance at the center of described wheel disc (3), then the ratio of D2:D3:D1 is 1:1.46～1.57:2.17～2.36.
- 3. centrifugal blower fan blade wheel according to claim 1 and 2, wherein, the inlet air flow angle of described linear leaf (1) is 27 °～33 °.
- 4. centrifugal blower fan blade wheel according to claim 1 and 2, wherein, the outlet flow angle of described linear leaf (1) is 35 °～45 °.
- 5. centrifugal blower fan blade wheel according to claim 1, wherein, described blade also includes the short blade (2) than described linear leaf (1) with less development length, described short blade (2) is positioned at described in adjacent two panels between linear leaf (1), and described short blade (2) arranges near the outlet side of described linear leaf (1) and is backward type blade.
- 6. centrifugal blower fan blade wheel according to claim 5, wherein, the development length of described short blade (2) is the 1/3～1/2 of the development length of described linear leaf (1).
- 7. centrifugal blower fan blade wheel according to claim 5, wherein, described short blade (2) is identical with the shape and size of described second segmental arc (5), and described short blade (2) is arranged on the centre of adjacent two described linear leafs (1).
- 8. centrifugal blower fan blade wheel according to claim 5, it is characterized in that, described centrifugal blower fan blade wheel includes 8～16 described linear leafs (1), and is provided with a described short blade (2) between the adjacent described linear leaf (1) of each two.
- 9. a road cleaning equipment, this road cleaning equipment includes centrifugal blower, it is characterised in that described centrifugal blower includes the centrifugal blower fan blade wheel according to any one in claim 1-8.
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| CN201310009047.XA CN103062112B (en) | 2013-01-10 | 2013-01-10 | Road cleaning equipment and centrifugal blower fan blade wheel thereof |
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| CN201310009047.XA CN103062112B (en) | 2013-01-10 | 2013-01-10 | Road cleaning equipment and centrifugal blower fan blade wheel thereof |
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| CN103062112A CN103062112A (en) | 2013-04-24 |
| CN103062112B true CN103062112B (en) | 2016-07-20 |
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| CN112032103B (en) * | 2019-06-03 | 2022-08-26 | 日本电产株式会社 | Impeller, air supply device and dust collector |
| CN114962325A (en) * | 2022-06-20 | 2022-08-30 | 太仓欣华盈电子有限公司 | High-efficiency fan blade and centrifugal fan |
| CN116292394B (en) * | 2023-05-11 | 2023-07-18 | 佛山市南海九洲普惠风机有限公司 | Retroverted centrifugal impeller with long and short composite blades |
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