CN203430854U - Impeller and centrifugal fan and road cleaning equipment with same - Google Patents
Impeller and centrifugal fan and road cleaning equipment with same Download PDFInfo
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- CN203430854U CN203430854U CN201320533286.0U CN201320533286U CN203430854U CN 203430854 U CN203430854 U CN 203430854U CN 201320533286 U CN201320533286 U CN 201320533286U CN 203430854 U CN203430854 U CN 203430854U
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- 238000004140 cleaning Methods 0.000 title claims abstract description 18
- 230000001154 acute effect Effects 0.000 claims abstract description 10
- 241000237858 Gastropoda Species 0.000 description 15
- 230000008676 import Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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Abstract
The utility model provides an impeller and have centrifugal fan and road cleaning equipment of this centrifugal fan impeller, the impeller includes parallel arrangement's front disc and back dish, and press from both sides and establish the front disc with a plurality of blades between the back dish, it is a plurality of the blade is along the front disc with the circumference of back dish is arranged, wherein, a plurality of the blade all is relative the back dish slope sets up, and each the blade with the contained angle between the plane of back dish place is acute angle theta, and satisfies theta ≧ 65, makes the export cross-section of impeller runner and the crisscross encounter of the spiral tongue place plane of spiral case, thereby the high velocity air who exports in the impeller runner strikes on the spiral tongue at different times, makes centrifugal fan's noise reduction; after the centrifugal fan is used, the product performance of the road cleaning equipment is effectively improved.
Description
Technical field
The utility model relates to blower fan field, and specifically relates to a kind of impeller and have its centrifugal blower and road cleaning equipment.
Background technique
Impeller is the core component of centrifugal blower, and it is the height with noise figure for product efficiency quality, has quite crucial impact.Particularly utilizing at a high speed, the road cleaning apparatus field of rubbish that high pressure draught cleans road and other public places and accumulated snow etc., the centrifugal blower that air quantity is provided is one of critical component of road cleaning equipment.The quality of blower fan system design directly determines cleaning amount and the clean rate of road cleaning equipment, is also related to whole road cleaning product performance, comprise the many-sides such as noise, energy consumption, and high performance blower fan key is the design of impeller.
The impeller of existing centrifugal blower is as Fig. 1, the perspective view that Fig. 1 is existing impeller.Existing impeller 10 generally comprises two wheel discs 101 that are arranged in parallel up and down, and is located between two wheel discs 101 and along a plurality of blades 102 of the circle distribution of two wheel discs 101, each blade 102 all relative two wheel discs 101 is arranged vertically.As shown in Figure 2, centrifugal blower comprises spiral case 11 and is positioned at the impeller 10 of spiral case 11 inside existing centrifugal blower.As impeller 10 High Rotation Speeds (in Fig. 1 for turning clockwise), air-flow axially enters through import the commutation of impeller 10 impeller channel that impeller 10 adjacent blades 102 form downwards along the suction port 13 on spiral case 11, near air outlet 12 on spiral case 11, air-flow flows out from impeller channel high speed, on the snail tongue 111 that can first hit at spiral case, then 12 outflows at a high speed from air outlet.Due to, the outlet of impeller channel and snail tongue 111 place planes are parallel to each other and meet in front, the whole strand of air-flow flowing out from same impeller channel high speed can be acted on face-to-face at synchronization and snail tongue 111 place planes, its active area is large.When impeller 10 periodically rotates, the whole strand of air-flow of exporting in same impeller channel will hit on snail tongue 111 at synchronization, forms stronger pressure pulsation, thereby causes very strong blower fan fundamental frequency noise and discrete noise.
Model utility content
An object of the present utility model is to provide a kind of inhomogeneity impeller that can improve the mobility status of impeller channel and increase impeller outlet air-flow.
Another object of the present utility model is to provide a kind ofly can effectively fall low noise centrifugal blower.
To achieve these goals, one side of the present utility model, a kind of impeller is provided, described impeller comprises shroud and the hub disk be arrangeding in parallel, and is folded in a plurality of blades between described shroud and described hub disk, and a plurality of described blades are along the circumference of described shroud and described hub disk, wherein, a plurality of described blades all relatively described hub disk are obliquely installed, and described in each, the angle between blade and described hub disk place plane is acute angle theta, and meet θ≤65 °.
Preferably, a plurality of described blades all adopt the line style form of straight line-circular arc, comprise near the straight section of the import of described impeller with described straight section is tangent and being connected and near the circular arc portion of the outlet of described impeller.
Preferably, the length of described straight section is L, and the radius of described circular arc portion is R1, and 0.87≤L/R1≤1.25.
Preferably, described in each, the entrance point of blade is positioned on the first circumference that radius is R2, described in each, the outlet end of blade is positioned on the second circumference that radius is R3, described the first circumference, the second circumference have the common center of circle, the central axis of described impeller is through the described center of circle, and satisfied 1.865≤R3/R2≤3.174.
Preferably, the entrance angle α that described in each, the angle of the tangent line of the straight section of blade and described the first circumference is described blade, the exit angle β that described in each, the angle of the tangent line of the tangent line of the circular arc portion of blade and described the second circumference is described blade, and meet 45 °≤α≤60 °, 130 °≤β≤145 °.
Preferably, along the direction of the central axis of described impeller, from described shroud to described hub disk, the entrance angle α of described blade increases gradually, and the scale factor of increase is λ 1, and meets 0.08≤λ 1≤0.14; The exit angle β of described blade increases gradually, and the scale factor of increase is λ 2, and meets 0.12≤λ 2≤0.16.
Preferably, the circular arc portion of described blade is towards the first lateral bend of blade, and when described angle theta is positioned at the first side of blade, described acute angle theta meets θ≤75 °, when described angle theta is positioned at second side relative with the first side of blade, described acute angle theta meets θ≤65 °.
Preferably, described shroud and described hub disk limit the outlet of described impeller, and the width of described outlet is H, 0.21≤H/R3≤0.48.
On the other hand of the present utility model, a kind of centrifugal blower is provided, this centrifugal blower comprises spiral case and is arranged on the impeller in described spiral case, the impeller that described impeller provides for the utility model.The impeller that this centrifugal blower is used the utility model to provide, can effectively reduce the noise of centrifugal blower.
Also one side of the present utility model, provides a kind of road cleaning equipment, the centrifugal blower that this road cleaning equipment is used the utility model to provide.
Pass through technique scheme, in the impeller providing due to the utility model, blade lean setting due to impeller, and be designed to suitable angle, the outlet of impeller channel and the snail tongue place plane of spiral case are interlocked meets, the high velocity air of exporting from same impeller channel was hit on snail tongue in the different time, thereby act on the phase shifting of the gas power in territory, spiral inlet area, the impact of the high velocity air of outlet output that has weakened impeller to spiral case, thereby reduced the noise of centrifugal blower, promoted the product performance of road cleaning equipment.
Other feature and advantage of the present utility model partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is existing impeller perspective view;
Fig. 2 is the perspective view of existing centrifugal blower;
Fig. 3 is the perspective view of the impeller that provides of the utility model embodiment;
Fig. 4 is the perspective view that the impeller shown in Fig. 3 only retains hub disk and individual blade;
Fig. 5 is the perspective view of the centrifugal blower that provides of the utility model embodiment;
Fig. 6 is the plan view of the internal structure of the impeller that provides of the utility model embodiment; And
Fig. 7 is the sectional view of Fig. 6.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model mode of execution is described in further detail.
In embodiment of the present utility model, in the situation that not doing contrary explanation, the noun of locality of use typically refers to reference to upper and lower, left and right shown in the drawings as " upper and lower, left and right "; " inside and outside " refers to inside and outside with respect to the profile of each parts itself.Use as: " blade entrance point " refers to the blade tip near impeller middle spindle line, and " blade exit end " refers to the blade tip near impeller outlet.
It should be noted that, the impeller that the utility model embodiment provides is for turning clockwise, and the improvement carried out mainly for impeller 20 of the utility model embodiment, and other structure of centrifugal blower can, with reference to existing structure, be not repeated herein.To being described in detail as follows of impeller 20.
As shown in Figure 3 and Figure 4, according to an aspect of the present utility model, a kind of impeller 20 is provided, this impeller 20 comprises shroud 201 and the hub disk 202 be arrangeding in parallel and is folded in a plurality of blades 203 between described shroud 201 and described hub disk 202, a plurality of described blades 203 are along the circumference of described shroud 201 and described hub disk 202, wherein, a plurality of described blades 203 all relatively described hub disk are in tilted layout, and the angle described in each between blade 203 and described hub disk 203 place planes is acute angle theta, and meets θ≤65 °.
As shown in Figure 5, according on the other hand of the present utility model, provide a kind of centrifugal blower, wherein, this centrifugal blower comprises spiral case 21 and is contained in the impeller 20 that the utility model in described spiral case 21 provides.It should be noted that this spiral case 21 can adopt various known spiral case form of the prior art, does not repeat them here.
In impeller 20 of the present utility model, each blade 203 is mounted to inclination form, and be the angle of θ with the angle of hub disk 202 place planes, make the outlet of impeller channel that adjacent two blades 203 form and the snail tongue of spiral case 21 211 place planes certain angle that staggers when meeting, thereby prevented that the outlet of impeller channel and snail tongue 211 place planes from meeting face-to-face, make can not hit on snail tongue 211 at synchronization from rotating to the high velocity air flowing out in the impeller channel near the air outlet 212 of spiral case 21, be that high velocity air in same impeller channel can meet at different time and snail tongue 211, high velocity air near hub disk 202 can first meet with snail tongue 211, then the high velocity air and the snail tongue 211 that are progressively transitioned near shroud 201 meet, the phase place that makes to act on the gas power in snail tongue 211 regions will stagger, thereby weakened the impact of high velocity air to centrifugal blower volute 21, effectively reduce the sound pressure level at centrifugal blower fundamental frequency place, realize and reduce noise.
In the utility model, blade 203 can form various suitable blade line styles.Fig. 6 for example, in the embodiment that the utility model provides, each blade 203 all adopts the line style form of straight line-circular arc, comprises near the straight section of impeller suction port with straight section is tangent and being connected and near the circular arc portion of impeller air outlet.Preferably, as shown in Figure 4 in embodiment, the circular arc portion of described blade 203 is towards the first lateral bend of blade 203, when described angle theta is positioned at the first side of blade 203, described acute angle theta meets θ≤75 °, when described angle theta is positioned at second side relative with the first side of blade 203, described acute angle theta meets θ≤65 °.
Wherein, the length of straight section is L, and the radius of circular arc portion is R1.In addition, can appropriate design R1 and the size of L, to reduce the flow losses in impeller channel.In the mode of execution shown in Fig. 6, preferably, can make 0.87≤L/R1≤1.25.Selectively, the line style of blade 203 also can for other curves and/rectilinear form, at this, do not illustrate.
In the utility model, quantity and the distribution form of blade 203 can be set as required, in order to obtain preferably effect, particularly, in the embodiment shown in fig. 6, the quantity of blade 203 is 16, and arranges along the even circumferential of described shroud 201 and described hub disk 202.
In addition, in conjunction with Fig. 6 and Fig. 7, on a cross section of impeller 20, described in each, the entrance point of blade 203 is positioned on the first circumference that radius is R2, described in each, the outlet end of blade 203 is positioned on the second circumference that radius is R3, and described the first circumference, the second circumference have the intersection point O that common center of circle O(is horizontal datum AA and vertical reference line BB in Fig. 6).In other words, in the present embodiment, blade 203 inlet end in impeller 20 and blade 203 outlet ends are formed on the first cylinder of coaxial setting and the circumferential surface of the second cylinder, and wherein, the radius of the first cylinder is R2, and the radius of the second cylinder is R3.And the central axis ZZ of impeller shown in central axis ZZ(Fig. 7 of described impeller 20 is the straight line through the intersection point O of horizontal datum AA in Fig. 6 and vertical reference line BB along the direction shown in vertical view 6) through described center of circle O, this central axis ZZ is the central axis of the first cylinder or the second cylinder.。Wherein: 1.865≤R3/R2≤3.174, further to optimize the shape of blade 203, obtain the beneficial effect of optimizing.And, in order to make the air pressure of impeller 20 and the combination property of flow efficiency better, can according to the air inlet port size of impeller 20, design the extended length of blade 203 straight sectioies, preferably, 0.97≤R2/L≤2.134.In addition, the entrance angle of blade 203 is (in Fig. 6, the entrance angle of blade 203 is the angle between the tangent line of the first circumference at blade entrance point place and the tangent line of the length bearing of trend along blade 203 of the straight section of blade, the length bearing of trend of its Leaf 203 is the suction port of blade 203 to the direction of the air outlet extension of blade 203) be α, the exit angle of blade 203 is (in Fig. 6, the exit angle of blade 203 be the tangent line of the second circumference at blade exit end place and the circular arc portion of blade 203 the tangent line of the length bearing of trend along blade 203 between angle) be β, wherein, 45 °≤α≤60 °, 130 °≤β≤145 °.
Particularly, because blade of the present utility model 203 is set to inclination form, make along the direction of the central axis ZZ of impeller 20, on the different cross section of impeller 20, the entrance angle α of blade 203 and the angular dimension of exit angle β are all not identical.Wherein, be with should be noted that, on the different cross section of impeller 20, the entrance angle α of blade 203 is the angle between the tangent line of corresponding circumference at import end points place of blade 203 and the tangent line of the length bearing of trend along blade 203 of the straight section of blade 203, and the exit angle β of blade 203 is the angle between the tangent line of corresponding circumference at outlet end points place of blade 203 and the tangent line of the length bearing of trend along blade 203 of the circular arc portion of blade 203.
Preferably, direction along the central axis ZZ of the impeller 20 of centrifugal blower, on the different cross section of impeller 20, (Figure 6 shows that an impeller cross section of impeller 20), the entrance angle α of blade 203 increases to hub disk 203 gradually from shroud 202, the scale factor increasing is λ 1, and meet 0.08≤λ 1≤0.14, the exit angle β of blade 203 increases to hub disk 203 gradually from shroud 202, the scale factor increasing is λ 2, and meet 0.12≤λ 2≤0.16, conventionally adopt this design can make the entrance angle α of blade 203, exit angle β and the entrance angle that enters the air-flow of impeller 20, the situation of change of exit angle is consistent, the air flow energy that assurance enters impeller channel is just close to blade 203 and is flowed, thereby improve the mobility status of impeller channel, further reduce the noise of centrifugal blower.Except this design, all should the dropping in protection domain of the present utility model about the entrance angle of blade 203 and the design of exit angle of other that those skilled in the art can expect.
In addition, as shown in Figure 7, described shroud 201 and hub disk 202 limit the outlet 205 of impeller 20, adjacent blades 203 makes described outlet 205 form some impeller channels, on described shroud 201, form the import 204 of impeller 20, the width of described outlet 205 is H, wherein, 0.21≤H/R3≤0.48, so that impeller 20 can provide suitable flow and pressure.
In addition, the utility model also provides a kind of road cleaning equipment, and as sweeping machine, wherein, this road cleaning equipment comprises centrifugal blower of the present utility model.Because the blade 203 of impeller 20 is obliquely installed, and be designed to suitable angle, the outlet of impeller channel that makes to rotate near 212 places, air outlet of spiral case 21 interlocks and meets with the snail tongue of spiral case 21 211 place planes, the high velocity air of exporting from same impeller channel was hit on snail tongue 211 in the different time, thereby act on the phase shifting of the gas power in territory, spiral inlet area, the impact of the high velocity air of outlet 205 output that has weakened impeller to spiral case 21, has reduced the noise of centrifugal blower; Use after this centrifugal blower, the product performance of this road cleaning equipment are effectively promoted.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, between various mode of execution of the present utility model, also can carry out combination in any, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. an impeller, described impeller comprises shroud and the hub disk be arrangeding in parallel, and be folded in a plurality of blades between described shroud and described hub disk, a plurality of described blades are along the circumference of described shroud and described hub disk, it is characterized in that, a plurality of described blades all relatively described hub disk are obliquely installed, and described in each, the angle between blade and described hub disk place plane is acute angle theta, and meet θ≤65 °.
2. impeller according to claim 1, it is characterized in that, a plurality of described blades all adopt the line style form of straight line-circular arc, comprise near the straight section of the suction port of described impeller with described straight section is tangent and being connected and near the circular arc portion of the air outlet of described impeller.
3. impeller according to claim 2, is characterized in that, the length of described straight section is L, and the radius of described circular arc portion is R1, and 0.87≤L/R1≤1.25.
4. impeller according to claim 2, it is characterized in that, described in each, the entrance point of blade is positioned on the first circumference that radius is R2, described in each, the outlet end of blade is positioned on the second circumference that radius is R3, described the first circumference, the second circumference have the common center of circle, the central axis of described impeller is through the described center of circle, and satisfied 1.865≤R3/R2≤3.174.
5. impeller according to claim 4, it is characterized in that, the entrance angle α that described in each, the angle of the tangent line of the length bearing of trend along described blade of the straight section of blade and the tangent line of described the first circumference is described blade, the exit angle β that described in each, the angle of the tangent line of the length bearing of trend along described blade 2 of the circular arc portion of blade and the tangent line of described the second circumference is described blade, and meet 45 °≤α≤60 °, 130 °≤β≤145 °.
6. impeller according to claim 5, is characterized in that, along the direction of the central axis of described impeller, from described shroud to described hub disk, the entrance angle α of described blade increases gradually, and the scale factor of increase is λ 1, and meets 0.08≤λ 1≤0.14; The exit angle β of described blade increases gradually, and the scale factor of increase is λ 2, and meets 0.12≤λ 2≤0.16.
7. according to the impeller described in any one in claim 2-6, it is characterized in that, the circular arc portion of described blade is towards the first lateral bend of blade, when described angle theta is positioned at the first side of blade, described acute angle theta meets θ≤75 °, when described angle theta is positioned at second side relative with the first side of blade, described acute angle theta meets θ≤65 °.
8. impeller according to claim 4, is characterized in that, described shroud and described hub disk limit the outlet of described impeller, and the width of described outlet is H, 0.21≤H/R3≤0.48.
9. a centrifugal blower, is characterized in that, this centrifugal blower comprises spiral case and be arranged on the impeller in described spiral case, and described impeller is according to the impeller described in any one in claim 1-8.
10. a road cleaning equipment, is characterized in that, this road cleaning equipment comprises centrifugal blower according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533286.0U CN203430854U (en) | 2013-08-29 | 2013-08-29 | Impeller and centrifugal fan and road cleaning equipment with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533286.0U CN203430854U (en) | 2013-08-29 | 2013-08-29 | Impeller and centrifugal fan and road cleaning equipment with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203430854U true CN203430854U (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320533286.0U Expired - Lifetime CN203430854U (en) | 2013-08-29 | 2013-08-29 | Impeller and centrifugal fan and road cleaning equipment with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203430854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578327A (en) * | 2018-12-07 | 2019-04-05 | 佛山市南海九洲普惠风机有限公司 | A kind of backward inclined type of impeller |
-
2013
- 2013-08-29 CN CN201320533286.0U patent/CN203430854U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578327A (en) * | 2018-12-07 | 2019-04-05 | 佛山市南海九洲普惠风机有限公司 | A kind of backward inclined type of impeller |
| CN109578327B (en) * | 2018-12-07 | 2023-09-05 | 佛山市南海九洲普惠风机有限公司 | Backward bending impeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170614 Address after: 410000 Hunan province Changsha hi tech Development Zone, Lin Yulu No. 288 Patentee after: ZOOMLION ENVIRONMENTAL INDUSTRY Co.,Ltd. Address before: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140212 |