CN212868027U - Air duct structure of volute fan - Google Patents
Air duct structure of volute fan Download PDFInfo
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- CN212868027U CN212868027U CN202021804815.2U CN202021804815U CN212868027U CN 212868027 U CN212868027 U CN 212868027U CN 202021804815 U CN202021804815 U CN 202021804815U CN 212868027 U CN212868027 U CN 212868027U
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Abstract
The utility model relates to a wind channel structure of spiral case fan, it includes the front end housing, bounding wall and rear end housing, the bounding wall is the opening ring-type, the bounding wall, front end housing and rear end housing enclose into the wind channel jointly, the opening part of bounding wall is equipped with the air outlet, the left and right sides of air outlet is equipped with first fairlead and second fairlead respectively, the second fairlead passes through the circular arc transition surface with the opening one end of bounding wall and is connected, the first circular arc board that is tangent transition between the corresponding circular arc transition surface of bounding wall and the first fairlead in proper order, second circular arc board and third circular arc board, the centre of a circle of first circular arc board, the centre of a circle of second circular arc board and the centre of a circle of third circular arc board are triangular distribution, first circular arc board and the tangent transition of circular arc transition surface, the tangent transition of. The utility model discloses can make the air flow more smoothly in the wind channel, the noise is littleer, moreover, the wind channel extrados from the inner to the exit end between with the distance increase at wind wheel center more linear for the fan blows off air static pressure and the wind volume increase.
Description
Technical Field
The utility model relates to a spiral case fan, especially a wind channel structure of spiral case fan.
Background
The volute fan is widely applied to industries such as a range hood and the like, and comprises a volute, a wind wheel and a motor, wherein the volute is formed by enclosing a front end cover, an enclosing plate and a rear end cover, the enclosing plate is in an open ring shape, the front end cover and the rear end cover are respectively arranged on the front side and the rear side of the enclosing plate, the front end cover and the rear end cover jointly enclose a wind channel, an air outlet is formed in an opening of the enclosing plate, a front air inlet and a rear air inlet are respectively formed in the surfaces of the front end cover and the rear end cover, a motor frame is arranged on the rear air inlet, the. The coaming of above-mentioned structure corresponds and adopts two sections non-concentric circular arc boards to connect between the both sides of air outlet and forms, consequently, the gradual opening acceleration rate between coaming internal surface and the wind wheel centre of a circle is very fast to the process pressure that the air that the wind wheel was thrown away through wind channel propelling movement to the air outlet is not enough, and the wind speed descends, and the air pressure that appears the outside air vent easily is greater than the fan and blows off air pressure, leads to the phenomenon that the oil smoke of discharge flue flows backward.
Disclosure of Invention
An object of the utility model is to provide a rational in infrastructure, can increase fan during operation static pressure and amount of wind, noise reduction's spiral case fan's wind channel structure.
The purpose of the utility model is realized like this:
the utility model provides an air duct structure of spiral case fan, includes the spiral case, and the spiral case is enclosed by front end housing, bounding wall and rear end cap, and the bounding wall is the opening ring-type, and front end housing and rear end cap set up both sides around the bounding wall respectively, and bounding wall, front end housing and rear end cap enclose into the wind channel jointly, and the opening part of bounding wall is equipped with the air outlet, and the left and right sides of air outlet is equipped with first tailboard and second tailboard respectively, and the second tailboard is drawn forth the opening one end of board and is passed through circular arc transition face and be connected its: the first arc plate, the second arc plate and the third arc plate which are in tangent transition are sequentially arranged between the circular arc transition surface corresponding to the enclosing plate and the first leading-out plate, the circle center of the first arc plate, the circle center of the second arc plate and the circle center of the third arc plate are distributed in a triangular mode, the first arc plate and the circular arc transition surface are in tangent transition, and the third arc plate and the first leading-out plate are in tangent transition.
The purpose of the utility model can also adopt the following technical measures to solve:
more specifically, the inner side arc radius of the first arc plate is 140mm to 160mm, and the inner side arc radian of the first arc plate is 100 degrees to 110 degrees. Preferably, the method comprises the following steps: the medial surface circular arc radius of first circular arc board is 148mm to 152mm, and the medial surface circular arc radian of first circular arc board is 105 degrees to 110 degrees.
As a further scheme, the inner side surface arc radius of the second arc plate is 175mm to 195mm, and the inner side surface arc radian of the second arc plate is 20 degrees to 60 degrees. Preferably, the method comprises the following steps: the arc radius of the inner side surface of the second arc plate ranges from 180mm to 190mm, and the arc radian of the inner side surface of the second arc plate ranges from 28 degrees to 42 degrees.
As a further scheme, the arc radius of the inner side surface of the third arc plate is 180mm to 210mm, and the arc radian of the inner side surface of the third arc plate is 130 degrees to 170 degrees. Preferably, the method comprises the following steps: the radius of the arc of the inner side surface of the third arc plate is 190mm to 200mm, and the arc radian of the arc of the inner side surface of the third arc plate is 145 degrees to 160 degrees.
As a further scheme, a frame body is arranged on the outer end face of the air outlet, a front air inlet and a rear air inlet are respectively arranged on the surfaces of the front end cover and the rear end cover, and a motor frame is arranged on the rear air inlet; the wind channel is internally provided with a wind wheel, the motor frame is provided with a motor, the motor is in transmission connection with the wind wheel, and the radius of the wind wheel is 125mm to 155 mm.
As a further proposal, the horizontal distance from the tangent point T of the arc transition surface and the vertical line to the first end tab is 130mm to 135 mm; the second end-lead plate and the vertical line form an included angle of 40-45 degrees. The size of one end of the air outlet connected with the air duct is adjusted, and the sectional area between the inner end and the outer end of the air outlet is adjusted, so that the whole air outlet is reasonably and gradually increased from inside to outside, the increase of air exhaust volume and air exhaust pressure is realized, and the exhausted air can be conveyed to a farther position
As a further scheme, the edge of the front end cover is riveted with the front side edge of the coaming, the edge of the rear end cover is riveted with the rear side edge of the coaming, and connection is simpler and more convenient.
The utility model has the advantages as follows:
(1) the utility model discloses a wind channel inner wall is by the tangent smooth transition of three-section arc surface for the air flows more smoothly in the wind channel, and the noise is littleer, and moreover, the wind channel extrados from the inner to the exit end between with the distance increase at wind wheel center more linear, the air that the wind wheel was thrown away is sufficient through the process pressure of wind channel propelling movement to air outlet, and the wind speed is very fast, makes the fan blow off air static pressure and air volume increase.
(2) The utility model discloses mainly be applicable to smoke ventilator and use, because volume of airing exhaust and static pressure increase, the smoking ability is stronger, can avoid the interior oil smoke of during operation flue to flow backward moreover.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is another angle structure diagram of the present invention.
Fig. 3 is a left side view structure diagram of the present invention.
FIG. 4 is a schematic sectional view A-A of FIG. 3.
Fig. 5 is a schematic view of the contour structure of the inner side surface of the coaming in fig. 4.
Fig. 6 is a schematic view of a three-dimensional structure of the middle coaming of the present invention.
FIG. 7 is a schematic sectional view of the structure of FIG. 3B-B.
Fig. 8 is an enlarged schematic view of the structure at C in fig. 7.
Fig. 9 is a schematic view of the structure of the present invention.
Fig. 10 is a schematic sectional view of fig. 9 taken along line D-D.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1 to 10, an air duct structure of a volute fan includes a volute 20, the volute 20 is enclosed by a front end cover 4, a shroud 5 and a rear end cover 7, the shroud 5 is in an open ring shape, the front end cover 4 and the rear end cover 7 are respectively disposed on front and rear sides of the shroud 5, the front end cover 4 and the rear end cover 7 together enclose an air duct 58, an air outlet 51 is disposed at an opening of the shroud 5, a first lead-out plate 55 and a second lead-out plate 56 are respectively disposed on left and right sides of the air outlet 51, the second lead-out plate 56 is connected with one end of the opening of the shroud 5 through an arc transition surface 57, a first arc plate 52, a second arc plate 53 and a third arc plate 54 are sequentially in tangential transition between the arc transition surface 57 and the first lead-out plate 55, a circle O2 of the first arc plate 52, a circle O3 of the second arc plate 53 and an O4 of the third arc plate 54 are in a triangular distribution, And is positioned at the inner side of the enclosing plate 5, the first arc plate 52 is in tangential transition with the arc transition surface 57, and the third arc plate 54 is in tangential transition with the first end-drawing plate 55. In fig. 5: point a is the outer end of the second lead-out plate 56, point b is the junction of the second lead-out plate 56 and the arc transition surface 57, point c is the junction of the arc transition surface 57 and the first arc plate 52, point d is the junction of the first arc plate 52 and the second arc plate 53, point e is the junction of the second arc plate 53 and the third arc plate 54, point f is the junction of the third arc plate 54 and the first lead-out plate 55, and point g is the outer end of the first lead-out plate 55.
The inner side arc radius R2 of the first arc plate 52 is 148mm to 152mm, and the inner side arc radian of the first arc plate 52 is 105 degrees to 110 degrees; the inner side surface arc radius R3 of the second arc plate 53 is 180mm to 190mm, and the inner side surface arc radian of the second arc plate 53 is 28 degrees to 42 degrees; the inner side arc radius R4 of the third arc plate 54 is 190mm to 200mm, and the inner side arc radian of the third arc plate 54 is 145 degrees to 160 degrees.
The horizontal distance D from the tangent point T of the arc transition surface 57 and the vertical line L to the first lead-out plate 55 is 130mm to 135mm, and the second lead-out plate 56 inclines outwards and forms an included angle alpha of 40 degrees to 45 degrees with the vertical line L.
The radius R1 of the cambered surface of one side, facing the air outlet 51, of the arc transition surface 57 is 8.0mm to 9.0 mm. The circle center O1 of the arc transition surface 57 is positioned outside the shroud 5.
The first lead-out plate 55 inclines towards the inner side of the air outlet 51, and an included angle beta between the first lead-out plate 55 and a vertical line L is smaller than an included angle alpha between the second lead-out plate 56 and the vertical line L.
The outer end face of the air outlet 51 is provided with a frame 6, the surfaces of the front end cover 4 and the rear end cover 7 are respectively provided with a front air inlet 41 and a rear air inlet 71, and the rear air inlet 71 is provided with a motor frame 72.
The wind channel 58 is internally provided with a wind wheel 10, the motor frame 72 is provided with a motor 8, the motor 8 is in transmission connection with the wind wheel 10, and the radius of the wind wheel 10 is 125mm to 155 mm.
The front air inlet 41 of the front end cover 4 is provided with a cover ring 42. The cover ring 42 has a circular arc-shaped flange in cross section. The rear end cover 7 is also provided with a volute connecting frame 73.
The first arc plate 52, the second arc plate 53 and the third arc plate 54 are sequentially arranged between the arc transition surface 57 corresponding to the enclosing plate 5 and the first lead-out plate 55, and the second lead-out plate 56, the arc transition surface 57, the first arc plate 52, the second arc plate 53, the third arc plate 54 and the first lead-out plate 55 are formed by bending a sheet metal part.
A plurality of blades 1 are annularly distributed on the wind wheel 10, and the difference value between the radius R6 from the circumference of the inner ends of the blades 1 to the wind wheel center O5 and the radius R5 from the inner circumference of the cover ring 42 to the wind wheel center O5 is 4mm to 10 mm.
In the above embodiment, preferably, the edge of the front end cap 4 and the front side edge of the apron 5 are riveted to each other, and the edge of the rear end cap 7 and the rear side edge of the apron 5 are riveted to each other.
Claims (10)
1. The utility model provides an air duct structure of spiral case fan, including spiral case (20), spiral case (20) are enclosed by front end housing (4), bounding wall (5) and rear end housing (7), bounding wall (5) are the opening ring-type, front end housing (4) and rear end housing (7) set up respectively in the front and back both sides of bounding wall (5), front end housing (4) and rear end housing (7) enclose into wind channel (58) jointly, the opening part of bounding wall (5) is equipped with air outlet (51), the left and right sides of air outlet (51) is equipped with first lead out board (55) and second lead out board (56) respectively, the second is drawn out board (56) and is passed through circular arc transition face (57) with the opening one end of bounding wall (5) and is connected, its characterized in that: the first circular arc plate (52), the second circular arc plate (53) and the third circular arc plate (54) which are in tangent transition are sequentially arranged between the circular arc transition surface (57) corresponding to the coaming plate (5) and the first lead-out plate (55), the circle center of the first circular arc plate (52), the circle center of the second circular arc plate (53) and the circle center of the third circular arc plate (54) are distributed in a triangular mode, the first circular arc plate (52) is in tangent transition with the circular arc transition surface (57), and the third circular arc plate (54) is in tangent transition with the first lead-out plate (55).
2. The air duct structure of the volute blower of claim 1, wherein: the inner side surface arc radius of the first arc plate (52) is 140mm to 160mm, and the inner side surface arc radian of the first arc plate (52) is 100 degrees to 110 degrees.
3. The air duct structure of the volute blower of claim 2, wherein: the inner side surface arc radius of the first arc plate (52) is 148mm to 152mm, and the inner side surface arc radian of the first arc plate (52) is 105 degrees to 110 degrees.
4. The air duct structure of the volute blower of claim 1, wherein: the inner side surface arc radius of the second arc plate (53) is 175mm to 195mm, and the inner side surface arc radian of the second arc plate (53) is 20 degrees to 60 degrees.
5. The air duct structure of the volute blower of claim 4, wherein: the arc radius of the inner side surface of the second arc plate (53) ranges from 180mm to 190mm, and the arc radian of the inner side surface of the second arc plate (53) ranges from 28 degrees to 42 degrees.
6. The air duct structure of the volute blower of claim 1, wherein: the arc radius of the inner side surface of the third arc plate (54) is 180mm to 210mm, and the arc radian of the inner side surface of the third arc plate (54) is 130 degrees to 170 degrees.
7. The air duct structure of the volute blower of claim 6, wherein: the arc radius of the inner side surface of the third arc plate (54) is 190mm to 200mm, and the arc radian of the inner side surface of the third arc plate (54) is 145 degrees to 160 degrees.
8. The air duct structure of the volute blower of claim 1, wherein: a frame body (6) is arranged on the outer end face of the air outlet (51), a front air inlet (41) and a rear air inlet (71) are respectively arranged on the surfaces of the front end cover (4) and the rear end cover (7), and a motor (8) frame (72) is arranged on the rear air inlet (71); be equipped with wind wheel (10) in wind channel (58), be equipped with motor (8) on motor (8) frame (72), motor (8) are connected with wind wheel (10) transmission, and the radius of wind wheel (10) is 125mm to 155 mm.
9. The air duct structure of the volute blower of claim 8, wherein: the horizontal distance from the tangent point of the arc transition surface (57) and the vertical line to the first lead-out plate (55) is 130mm to 135 mm; the included angle between the second end-lead plate (56) and the vertical line is 40-45 degrees.
10. The air duct structure of the volute blower of claim 1, wherein: the edge of the front end cover (4) is riveted with the front side edge of the coaming (5), and the edge of the rear end cover (7) is riveted with the rear side edge of the coaming (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021804815.2U CN212868027U (en) | 2020-08-25 | 2020-08-25 | Air duct structure of volute fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021804815.2U CN212868027U (en) | 2020-08-25 | 2020-08-25 | Air duct structure of volute fan |
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| Publication Number | Publication Date |
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| CN212868027U true CN212868027U (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021804815.2U Active CN212868027U (en) | 2020-08-25 | 2020-08-25 | Air duct structure of volute fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878424A (en) * | 2020-08-25 | 2020-11-03 | 中山市高途五金制品有限公司 | Large-air-volume volute fan |
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2020
- 2020-08-25 CN CN202021804815.2U patent/CN212868027U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878424A (en) * | 2020-08-25 | 2020-11-03 | 中山市高途五金制品有限公司 | Large-air-volume volute fan |
| CN111878424B (en) * | 2020-08-25 | 2024-05-17 | 中山市高途五金制品有限公司 | Large air volume volute fan |
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