CN205503561U - Fan guiding device and centrifugal fan - Google Patents
Fan guiding device and centrifugal fan Download PDFInfo
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- CN205503561U CN205503561U CN201521055053.XU CN201521055053U CN205503561U CN 205503561 U CN205503561 U CN 205503561U CN 201521055053 U CN201521055053 U CN 201521055053U CN 205503561 U CN205503561 U CN 205503561U
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- fan
- guide device
- flow guide
- front disc
- damage portion
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Abstract
The utility model relates to a fan the guiding device, include water conservancy diversion portion and fall damage portion, water conservancy diversion portion is tubular structure a second end that is used for the first end of air inlet and is used for the air -out, it is being close to to fall the setting of damage portion on the lateral wall of water conservancy diversion portion second end. The utility model provides a fan guiding device through the structure in fan guiding device outside surface increase reduction gas -flow resistance loss, has reduced the resistance loss that arouses from the mobile boundary layer of guiding device outside backward flow, has reduced the noise that energy dissipation arouses, has improved the disorderly state of the velocity of flow of backward flow to reach the purpose that reduces the noise, can reduce the consumption level of centrifugal fan system simultaneously, can realize falling the 1 -2dB that makes an uproar, power reduction about 8%.
Description
Technical field
This utility model relates to blower fan correlative technology field, particularly a kind of flow guide device of fan and centrifugal blower.
Background technology
Guiding device is the important accessory of blower fan, sets up uniform velocity field and pressure field before the import of blower fan, to reduce flow losses raising fan efficiency.Guiding device structure can affect fan performance, designs good guiding device flow losses less, and designs unreasonable meeting and make condition for import deteriorate, causes fan performance to decline.The noise of gas centrifugation blower fan is more and more concerned, existing centrifugation blade the most all coordinates guiding device to be used together, owing to sound is different, (fan blade rotates, guiding device is static), cause must existing between the two certain interval, this gap not only can cause leakage, and the air-flow passing through this gap interacts with primary air, being degrading the inlet conditions of centrifugal blower further, cause turbulence intensity to increase, the noise of blower fan increases therewith.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of flow guide device of fan and centrifugal blower, to solve in prior art the technical problems such as airflow reflux drag losses at air inlet of centrifugal fan is bigger.
According to first aspect of the present utility model, thering is provided a kind of flow guide device of fan, including diversion division and fall damage portion, described diversion division is tubular construction, including the first end for air intake and the second end for air-out, described fall damage portion is positioned close on the lateral wall of described diversion division the second end.
Preferably, described fall damage portion is groove and/or bulge-structure.
Preferably, described groove is spherical groove or end face is circular or polygonal cylindrical groove.
Preferably, described depth of groove is 0.5-2.5mm, and end face diameter is 0.5-5mm.
Preferably, described projection is hemisphere jut or end face is circular or polygonal column-shaped projection.
Preferably, described height of projection is 0.5-2.5mm, and end face diameter is 0.5-5mm.
Preferably, described polygon is rhombus.
According to second aspect of the present utility model, thering is provided a kind of centrifugal blower, including centrifugal blower fan blade wheel and impeller front disc, described impeller front disc is arranged on the side of described centrifugal blower fan blade wheel, also wrapping and state flow guide device of fan, described flow guide device of fan is positioned close to the position of described impeller front disc.
Preferably, the second end of described flow guide device of fan is presented axially in inside described impeller front disc.
Preferably, a fall damage portion part for described flow guide device of fan is presented axially in inside described impeller front disc, and another part is positioned at outside described impeller front disc.
Preferably, described fall damage portion is positioned at the part outside described impeller front disc and at least accounts for the 4/5 of described fall damage portion.
The flow guide device of fan that this utility model provides, by increasing the structure reducing gas-flow resistance loss at flow guide device of fan outer surface, reduce the drag losses that the flow boundary layer of side reflux causes from guiding device, reduce the noise that energy dissipation causes, improve the flow velocity disturbance state of backflow, thus reached to reduce the purpose of noise, the power consumption levels of centrifugal blower fan system can be reduced simultaneously, noise reduction 1-2dB, power reduction about 8% can be realized.
Accompanying drawing explanation
By description to this utility model embodiment referring to the drawings, of the present utility model above-mentioned and other objects, features and advantages will be apparent from, in the accompanying drawings:
Fig. 1 is flow guide device of fan schematic diagram；
Fig. 2 is enlarged drawing at A in Fig. 1；
Fig. 3 is that centrifugal blower fan blade wheel assembles schematic diagram with flow guide device of fan；
Fig. 4 is enlarged drawing at B in Fig. 3；
Fig. 5 is that centrifugal blower fan blade wheel assembles schematic front view with flow guide device of fan.
Detailed description of the invention
It is more fully described various embodiment of the present utility model hereinafter with reference to accompanying drawing.In various figures, identical element uses same or similar reference to represent.For the sake of clarity, the various piece in accompanying drawing is not necessarily to scale.
The flow guide device of fan that this utility model provides is mainly used in the air inlet of centrifugal blower, air-flow is carried out water conservancy diversion, and reduce noise and the power consumption of blower fan by arranging noise-reducing structure on described guiding device, below in conjunction with specific embodiment, the concrete structure of this utility model flow guide device of fan is described in detail.
As shown in Figure 1, the flow guide device of fan 1 that this utility model provides includes diversion division 11 and fall damage portion 12, described diversion division 11 is tubular construction, including the first end for air intake and the second end for air-out, preferably, described first end diameter is more than the second end diameter, and is arc along its sidewall of cross section that tubular construction is axial, in order to air flows.Described fall damage portion 12 is positioned close on the lateral wall at described diversion division 11 second end, and circumferentially distributed along described diversion division 11, for reduce air-flow by this at time drag losses so that reduce air-flow by this at time noise (hereafter describing in detail).As shown in Figure 2, described fall damage portion 12 is the groove being arranged on described diversion division 11 lateral wall, preferably, described groove is degree of depth 0.5-2.5mm, the cylindrical groove of end face diameter 0.5-5mm, or the groove of the most close arbitrary shape of size, if end face is oval, rhombus or polygon etc., or, described groove is spherical groove.In another embodiment, described fall damage portion 12 may also be configured to projection, preferably, described projection is height 0.5-2.5mm, the cylinder of end face diameter 0.5-5mm, or the projection that end face is arbitrary shape that size is the most close, if end face is oval, rhombus or polygon etc., or, described projection may also be configured to spherical.Further, described fall damage portion 12 also can include that groove and projection, described groove and projection uniformly or are freely distributed with arbitrary proportion simultaneously.Described fall damage portion 12 is uniformly distributed circumferentially on the outer wall at described diversion division 11 second end, or along its circumference non-equidistance distribution, it is also possible to freely it is distributed in certain scope.
The flow guide device of fan 1 that this utility model provides, by arranging described fall damage portion 12 at described diversion division 11 second end, reduces the drag losses that the flow boundary layer from the side reflux of flow guide device of fan 1 causes, thus reduces the noise that energy dissipation causes.
This utility model also provides for a kind of centrifugal blower being provided with above-mentioned flow guide device of fan 1, also include centrifugal blower fan blade wheel 21 and impeller front disc 22, described flow guide device of fan 1 is arranged on the air inlet of described centrifugal blower, described centrifugal blower fan blade wheel 21 is connected on motor reel, fall damage portion 12 part in the axial direction for described flow guide device of fan 1 is positioned at described impeller front disc 22, and another part is positioned at outside described impeller front disc 22.
As shown in Figure 3,4, described impeller front disc 22 is fixed to the air intake of described centrifugal blower fan blade wheel 21, and described centrifugal blower fan blade wheel 21 is provided with fan blade 211.Described flow guide device of fan 1 is positioned close at described impeller front disc 22.Second end of described diversion division 11 is presented axially in inside described impeller front disc 22, and described fall damage portion 12 part is positioned at inside described impeller front disc 22, and another part is positioned at outside described impeller front disc 22.As shown in Figure 5, owing to needing to rotate when described centrifugal blower fan blade wheel 21 works, described impeller front disc 22 rotates with described centrifugal blower fan blade wheel 21, described flow guide device of fan 1 is static, so must leave certain gap between described flow guide device of fan 1 and impeller front disc 22, the most described impeller front disc 22 diameter at described diversion division 11 second end is more than the external diameter of described diversion division 11 second end.Preferably, the described fall damage portion 12 distribution on described diversion division 11 is axial is positioned at described impeller front disc 22 length in its axial direction by described diversion division 11 and determines, the most described fall damage portion 12 distribution on described diversion division 11 is axial is more than 5 times that described diversion division 11 is positioned at described impeller front disc 22 length in its axial direction, and the described fall damage portion 12 outside described impeller front disc 22 that is positioned in other words at least accounts for the 4/5 of described fall damage portion 12.
The gas-flow resistance loss of air inlet backflow when centrifugal blower runs is reduced by arranging fall damage portion 12 on described flow guide device of fan 1, improve the flow velocity disturbance state of backflow, reduce centrifugal blower power, and then reducing the effect of centrifugal blower power consumption, the most described fall damage portion 12 also reduces the noise of blower fan.
Note: specifically described herein is axially above-below direction in Fig. 1.
Should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation or sequentially that there is any this reality between these entities or operation.
It is last that it is noted that obviously above-described embodiment is only for clearly demonstrating this utility model example, and not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus amplified out or variation still in protection domain of the present utility model among.
Claims (11)
1. a flow guide device of fan, it is characterised in that including diversion division and fall damage portion, described diversion division is tubular construction, and including the first end for air intake and the second end for air-out, described fall damage portion is positioned close on the lateral wall of described diversion division the second end.
Flow guide device of fan the most according to claim 1, it is characterised in that described fall damage portion is groove and/or bulge-structure.
Flow guide device of fan the most according to claim 2, it is characterised in that described groove is spherical groove or end face is circular or polygonal cylindrical groove.
Flow guide device of fan the most according to claim 3, it is characterised in that described depth of groove is 0.5-2.5mm, end face diameter is 0.5-5mm.
Flow guide device of fan the most according to claim 2, it is characterised in that described projection is hemisphere jut or end face is circular or polygonal column-shaped projection.
Flow guide device of fan the most according to claim 5, it is characterised in that described height of projection is 0.5-2.5mm, end face diameter is 0.5-5mm.
7. according to the flow guide device of fan described in claim 3 or 5, it is characterised in that described polygon is rhombus.
8. a centrifugal blower, including centrifugal blower fan blade wheel and impeller front disc, described impeller front disc is arranged on the side of described centrifugal blower fan blade wheel, it is characterized in that, also include that the flow guide device of fan described in any one of claim 1-7, described flow guide device of fan are positioned close to the position of described impeller front disc.
Centrifugal blower the most according to claim 8, it is characterised in that the second end of described flow guide device of fan is presented axially in inside described impeller front disc.
Centrifugal blower the most according to claim 9, it is characterised in that a fall damage portion part for described flow guide device of fan is presented axially in inside described impeller front disc, and another part is positioned at outside described impeller front disc.
11. centrifugal blowers according to claim 10, it is characterised in that fall damage portion of described fall damage portion is positioned at the part outside described impeller front disc and at least accounts for the 4/5 of described fall damage portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521055053.XU CN205503561U (en) | 2015-12-16 | 2015-12-16 | Fan guiding device and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521055053.XU CN205503561U (en) | 2015-12-16 | 2015-12-16 | Fan guiding device and centrifugal fan |
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| Publication Number | Publication Date |
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| CN205503561U true CN205503561U (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521055053.XU Active CN205503561U (en) | 2015-12-16 | 2015-12-16 | Fan guiding device and centrifugal fan |
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| CN (1) | CN205503561U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387003A (en) * | 2015-12-16 | 2016-03-09 | 珠海格力电器股份有限公司 | Fan flow guide device and centrifugal fan |
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2015
- 2015-12-16 CN CN201521055053.XU patent/CN205503561U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387003A (en) * | 2015-12-16 | 2016-03-09 | 珠海格力电器股份有限公司 | Fan flow guide device and centrifugal fan |
| CN105387003B (en) * | 2015-12-16 | 2018-11-02 | 珠海格力电器股份有限公司 | A kind of flow guide device of fan and centrifugal blower |
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| GR01 | Patent grant |