CN206682006U - multi-wing centrifugal fan - Google Patents
multi-wing centrifugal fan Download PDFInfo
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- CN206682006U CN206682006U CN201720371647.4U CN201720371647U CN206682006U CN 206682006 U CN206682006 U CN 206682006U CN 201720371647 U CN201720371647 U CN 201720371647U CN 206682006 U CN206682006 U CN 206682006U
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- guide vane
- centrifugal fan
- impeller
- spiral case
- wing centrifugal
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Abstract
It the utility model is related to a kind of multi-wing centrifugal fan, the first motor (4) rotated including spiral case (1) and the impeller (2) being arranged in the spiral case (1) and the driving impeller (2), the spiral case (1) are provided with air inlet (11) and air outlet (12)；It is characterized in that being also interval with least two panels guide vane (3) in the inner side of the impeller (2) in the spiral case (1), each guide vane (3) is both connected in rotating shaft (6)；Rotating shaft (5) described in the output shaft drive connection of second motor (7), second motor (7) are connected on support (5), and the support (5) is connected on the spiral case (1)；Each guide vane is arranged relative to the center convolution of the air inlet (11).
Description
Technical field
Centrifugal blower is the utility model is related to, refers specifically to a kind of multi-wing centrifugal fan.
Background technology
The blower fan that range hood uses is multiple wing type centrifugal blower fan mostly, the air velocity distribution at the impeller inlet of centrifugal blower
The disorderly gas field such as turbulent flow, eddy flow can be produced, the air quantity, blast, total pressure efficiency of blower fan can be made reduce.
CN201020287875.1 discloses one kind《Range hood air unit with rectified action》, it is in blower fan snail
The air inlet of shell fixes covering and is provided with screens.So, when air-flow passes through air inlet, by the rectified action of screens,
Flue gas is avoided to form turbulent flow when entering air inlet；But because there is a spacing at this patent screens position at vane inlet
From this improved effect or unobvious.
For another example CN201110432232.0 discloses one kind《Multiple wing type centrifugal blower fan with Multifunctional flow-guiding device》, its
Guide vane and air deflector are installed in impeller inner chamber, the performance such as blast, air quantity to range hood makes moderate progress, but because
Guide vane, the air deflector of the patent only cover the little space of impeller inner chamber, that the soot gas of impeller inner chamber are inwhole
Effectively water conservancy diversion.
The content of the invention
Technical problem to be solved in the utility model is to provide one kind for the present situation of prior art and can significantly improve leaf
Take turns the multi-wing centrifugal fan of entrance flow field and excellent noise reduction effect.
Technical scheme is used by the utility model solves above-mentioned technical problem：The multi-wing centrifugal fan, including spiral case
With the impeller that is arranged in the spiral case and the first motor of the driving wheel rotation, the spiral case be provided with air inlet and
Air outlet；It is characterized in that at least two panels guide vane is also interval with the spiral case in the inner side of the impeller, it is each described
Guide vane is both connected in rotating shaft；Rotating shaft described in the output shaft drive connection of second motor, second motor connection are being propped up
On frame, the support is connected on the spiral case；
Each guide vane is arranged relative to the center convolution of the air inlet.
Preferably, the rotation direction of each guide vane is identical with the rotation direction of the impeller.
Preferably, the external diameter of each guide vane is adapted with the size of the air inlet.
It is preferred that the inlet angle α of each guide vane is 80~100 °, the angle of outlet β of each guide vane for 140~
175°。
In above-mentioned each scheme, the structure of guide vane can have a variety of, such as tabular, preferably, each water conservancy diversion leaf
Piece is helicoid or globoidal structure.
The support can have a variety of positioning and mounting means, and preferably, the support is connected to the front end of the spiral case
On face.
It is preferred that the support includes supporting plate and at least three spoke slats being connected between the supporting plate and bracing ring；
The bracing ring is connected on the periphery of the air inlet of spiral case；
Second motor support is spacing in the supporting plate.The structure varies without the structure of former centrifugal blower, and
It is convenient for assembly, and inlet flow field is not impacted.
Preferably, the gap between the outer ledge of the guide vane and the impeller is 2~10mm；The structure can
Meets the requirement of water conservancy diversion effect that the needs of guide vane rotation becomes reconciled simultaneously.
Preferably, it is described that can control the distance between the outer ledge of the guide vane and the axis of the rotating shaft
3~8 times of the distance between the axis of the inside edge of guide vane and the rotating shaft.
Compared with prior art, the guide vane that multi-wing centrifugal fan provided by the utility model passes through specific structure
Set, air inlet region is divided into multiple relatively independent regions, a pre-selection component is produced to the fluid of entrance, can be improved
Flow field at impeller inlet, the actual relative fluid flow angle of fluid is intended to the relative fluid flow angle of blade, reduce multi-wing centrifugal fan
Energy loss caused by the high attack angle of impeller inlet and larger noise, while improve flow in circumferentially distributed uniform of impeller
Property, so as to reach the air quantity, blast, the total pressure efficiency that improve blower fan, the effect of the noise of blower fan is reduced, makes the suction equipped with the blower fan
Every condensation performance of lampblack absorber gets a promotion；Guide vane rotates in impeller simultaneously, and air-flow passes through first after spiral case air inlet
Being spun up by guide vane, air-flow is thrown in the blade of impeller by the centrifugal force after spinning up, and air-flow is spun up again,
Substantially increase pumping efficiency；And because guide vane is driven by single motor, it can be according to different operating modes, different flues
The requirement of air quantity, blast adjusts the velocity of rotation of guide vane in pressure, obtains more preferable suction effect.
Multi-wing centrifugal fan provided by the utility model is particularly suitable for application in range hood, and it can separate, be cold
The soot gas that solidifying spiral case inlet flows into, improve the oil smoke separating effect of blower fan, and the grease separation rate of oil smoke has obtained significantly
Improve, energy-saving and environmental protection positive effect；Guide vane is arranged on the upstream of impeller simultaneously, and the impeller of rotation is by guide vane at a high speed
Isolate with spiral case, prevent personnel from touching impeller because of maloperation, good safety protection function is played to personnel and impeller.
Brief description of the drawings
Fig. 1 is the longitudinal sectional view of the assembling structure of the utility model embodiment 1；
Fig. 2 is the schematic diagram of the assembling structure of the utility model embodiment 1；
Fig. 3 is the schematic perspective view of the decomposition texture of the utility model embodiment 1；
Fig. 4 is dump angle and flow velocity relativity figure in the utility model embodiment.
Fig. 5 is the three-dimensional signal of the guide vane of helicoid and part spiral case assembling structure in the utility model embodiment 2
Figure；
Fig. 6 is the schematic perspective view of guide vane and rotating shaft assembling structure in the utility model embodiment 2；
Fig. 7 is the floor map of guide vane in the utility model embodiment 2.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in Figures 1 to 4, the multi-wing centrifugal fan includes：
The first motor 4 that spiral case 1 and the impeller 2 that is arranged in spiral case 1 and driving impeller 2 rotate, spiral case 1 be provided with into
Air port 11 and air outlet 12.Wherein the first motor 4 is located at the middle part of impeller 2, and the output shaft of motor 4 is driven by central plate 13 to be connected
Connect impeller 2.
Guide vane 3, positioned at the inner side of impeller 2 and to the air inlet 11 of spiral case 1, there is more pieces, the present embodiment is six pieces,
For arc, the inside edge of each guide vane 3 is both connected in rotating shaft 6, the output shaft drive connection rotating shaft 6 of the second motor 7；Turn
The axis of axle 6 overlaps with the center line of air inlet 11.
Each guide vane 3 is to be arranged in the shape of a spiral along rotating shaft 6 relative to the center of air inlet 11, each spiral of guide vane 3
The rotation direction of arrangement is identical with the rotation direction of impeller 2.Each guide vane 3 is located at the upstream of impeller 2 relative to the flow direction of air-flow, and
And the gap between the outer ledge and impeller 2 of each guide vane is 7mm.Each guide vane 3 is globoidal structure in the present embodiment,
The inlet angle α of guide vane 3 is 90 °, and angle of outlet β is 150 °.
The distance between outer ledge and shaft axis of each guide vane are 120mm, the inside edge of guide vane with
The distance between shaft axis are 30mm, the wide 90mm of guide vane.
Support 5, including supporting plate 51 and four spoke slats 52 being connected between supporting plate 51 and bracing ring 53, bracing ring
53 are fixed on the periphery of air inlet 11.The support limit of second motor 7 is in supporting plate 51.
As shown in fig. 7, the conventional centrifugal blower without guide vane, the actual absolute velocity of impeller inlet is V, blade
It is β 1 with respect to fluid flow angle, actual relative fluid flow angle is β 1 ', one angle of attack i=β 1- β 1 ' of difference between them.
After the utility model adds guide vane, actual absolute velocity V will flow out along the angle of outlet of guide vane, its
Axis plane velocity is constant, so its speed is changed into V '.Now the relative fluid flow angle of flow of fluid is changed into β 1 from β 1 ' so that impeller
Inlet incidence angle is intended to 0, so as to greatly reduce capacity loss caused by gas shock and noise.
CFD emulation and test are carried out to the utility model, the utility model is relative to the centrifugal blower of routine, and fluid is in leaf
Impact on wheel reduces, so that runner whirlpool can effectively reduce, the flow velocity between leaf road similarly reduces, and makes Ye Daonei stream
Dynamic loss also can accordingly reduce, while make the circumferential flow distribution of impeller also more uniform.
Embodiment 2
As shown in Figures 5 to 7, the guide vane 3 in the present embodiment is propeller arrangement, and the root width of its helicoid is
5mm, the Breadth Maximum of its end is 30mm.
Remaining content is same as Example 1.
The guide vane of multiple helicoid structures can make the rotational domain that spiral case air inlet negative pressure forms 360 °, produce shape
Into tornado effect；During fume exhaust, bulky grain is aggregated into after oil smoke little particle rotary collision can be made, then by centrifugal blower leaf
Centrifugal force is thrown on the internal ring wall of spiral case caused by wheel, effectively improves oil smoke separating effect.Meanwhile oil smoke is passing through stator
When, it is necessary to entered around swirl vane in impeller blade, in this process, oil smoke can be contacted and filtered with swirl vane
Fall a part of grease, further improve oil smoke separating effect.
Relative to the guide vane in embodiment 1, the guide vane of helicoid reduces more to the actual angle of attack of air-flow,
The actual relative fluid flow angle of fluid is intended to the relative fluid flow angle of guide vane, further reduce the impact to impeller, improve
Flow circumference distributing homogeneity so that the performance such as the air quantity of blower fan, efficiency is improved.
Claims (10)
1. a kind of multi-wing centrifugal fan, including described in spiral case (1) and the impeller (2) being arranged in the spiral case (1) and driving
The first motor (4) that impeller (2) rotates, the spiral case (1) are provided with air inlet (11) and air outlet (12)；It is characterized in that institute
State in spiral case (1) and at least two panels guide vane (3), each guide vane (3) are also interval with the inner side of the impeller (2)
It is both connected in rotating shaft (6)；Rotating shaft (6) described in the output shaft drive connection of second motor (7), the second motor (7) connection
On support (5), the support (5) is connected on the spiral case (1)；
Each guide vane is arranged relative to the center convolution of the air inlet (11).
2. multi-wing centrifugal fan according to claim 1, it is characterised in that the rotation direction of each guide vane (3) with it is described
The rotation direction of impeller (2) is identical.
3. multi-wing centrifugal fan according to claim 2, it is characterised in that the external diameter of each guide vane (3) with it is described
The size of air inlet (11) is adapted.
4. multi-wing centrifugal fan according to claim 3, it is characterised in that the inlet angle α of each guide vane (3) is
80~100 °, the angle of outlet β of each guide vane (3) is 140~175 °.
5. multi-wing centrifugal fan according to claim 4, it is characterised in that each guide vane (3) is helicoid or arc
Face structure.
6. multi-wing centrifugal fan according to claim 5, it is characterised in that the guide vane (3) of helicoid structure
Root width is 3~10mm, and the Breadth Maximum of the guide vane (3) is 20~40mm.
7. according to multi-wing centrifugal fan described in claim 1 to 6 any claim, it is characterised in that support (5) connection
On the front end face of the spiral case (1).
8. multi-wing centrifugal fan according to claim 7, it is characterised in that the support (5) includes supporting plate (51) and connected
At least three spoke slats (52) being connected between the supporting plate (51) and bracing ring (53)；The bracing ring (53) is connected to snail
On the periphery of the air inlet (11) of shell (1)；
Second motor (7) support limit is in the supporting plate (51).
9. multi-wing centrifugal fan according to claim 8, it is characterised in that the outer ledge of the guide vane (3) and institute
It is 2~10mm to state the gap between impeller (2).
10. multi-wing centrifugal fan according to claim 9, it is characterised in that the outer ledge of the guide vane (3) with
The distance between axis of the rotating shaft (6) is between the inside edge of the guide vane (3) and the axis of the rotating shaft (6)
3~8 times of distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720371647.4U CN206682006U (en) | 2017-04-11 | 2017-04-11 | multi-wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720371647.4U CN206682006U (en) | 2017-04-11 | 2017-04-11 | multi-wing centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206682006U true CN206682006U (en) | 2017-11-28 |
Family
ID=60398899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720371647.4U Active CN206682006U (en) | 2017-04-11 | 2017-04-11 | multi-wing centrifugal fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339241A (en) * | 2017-04-11 | 2017-11-10 | 宁波方太厨具有限公司 | Multi-wing centrifugal fan |
-
2017
- 2017-04-11 CN CN201720371647.4U patent/CN206682006U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339241A (en) * | 2017-04-11 | 2017-11-10 | 宁波方太厨具有限公司 | Multi-wing centrifugal fan |
| CN107339241B (en) * | 2017-04-11 | 2023-09-15 | 宁波方太厨具有限公司 | Multi-wing centrifugal fan |
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