CN110552910A - Wind wheel and centrifugal fan - Google Patents
Wind wheel and centrifugal fan Download PDFInfo
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- CN110552910A CN110552910A CN201910862701.9A CN201910862701A CN110552910A CN 110552910 A CN110552910 A CN 110552910A CN 201910862701 A CN201910862701 A CN 201910862701A CN 110552910 A CN110552910 A CN 110552910A
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- 238000012360 testing method Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
- F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a wind wheel and a centrifugal fan, the wind wheel comprises a front disk 1 and a rear disk 2, the front disk 1 and the rear disk 2 are parallel to each other, a plurality of blades 3 are arranged between the front disk 1 and the rear disk 2, each blade 3 is vertical to the rear disk 2, each blade 3 is arranged in an arc shape, the central axis of the rear disk 2 is arranged in a circumferential array, a first rectangular coordinate system 4 is established by taking the center of the rear disk 2 as an original point, the connecting line of the end part of one blade 3 on the right side of the positive direction of the longitudinal axis far away from the center of the rear disk 2 and the original point of the first rectangular coordinate system 4 is a first line segment, the connecting line of the end part of one blade 3 on the right side of the positive direction of the longitudinal axis far away from the center of the rear disk 2 and the original point of the first rectangular coordinate system 4 is a second line segment, the end parts of the plurality of blades 3 far away from the center of the rear disk 2 form an outer circle, the, the ends of the plurality of blades 33 near the center of the back plate 22 enclose an inner circle. The invention provides a wind wheel and a centrifugal fan with high efficiency and low noise.
Description
Technical Field
The invention relates to a fan, in particular to a wind wheel and a centrifugal fan.
Background
In traditional centrifugal fan, the impeller front disc of fan also adopts conical and single arc structure, and the blade adopts single arc and narrow runner, and the air current energizing chance is little, and the air output has increased the air current resistance for a short time, and mobility and air current resistance when leading to the air-in are big to produce the mobile vortex noise of air current, "surge" phenomenon appears easily, noise when having increased the fan operation, and need adopt the great motor of power, increased the consumption.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: at least one of the problems set forth above is solved.
The solution of the invention for solving the technical problem is as follows:
The utility model provides a wind wheel, includes head disk, back plate, the head disk with the back plate is parallel to each other, the head disk with be provided with a plurality of blade, every between the back plate the blade is perpendicular the back plate, every the blade sets up for the circular arc type, with the central axis circumference array of back plate sets up, with the center of back plate establishes first rectangular coordinate system for the original point, and the axis of ordinates of first rectangular coordinate system upwards is the positive direction, one on axis of ordinates positive direction right side the keeping away from of blade the tip at back plate center with the original point line of first rectangular coordinate system is first line segment, first line segment with the contained angle beta 3 of axis of ordinates is 2.18, one on axis of ordinates positive direction right side of first rectangular coordinate system the blade is close to the tip at back plate center with the line of the original point of first rectangular coordinate system is the second line segment, the second line segment with the contained angle beta 4 of axis is 7.43, a plurality of the blade is kept away from the tip at back plate center encloses into the excircle, first line segment is crossing keeping away from of blade the extension line of back plate one end with the tangent contained angle of excircle is air outlet angle beta 1, and air outlet angle beta 1 is 160, a plurality of the blade is close to the tip at back plate center encloses into interior circle, the second line segment with correspond the nodical point of blade is called first nodical point, passes first nodical the tangent line of blade with the tangent contained angle of interior circle is air inlet angle beta 2, air inlet angle beta 2 is 60.
As a further improvement of the technical scheme, the middle part of the front disc is arranged in the opening, and the diameter of the inner circle is smaller than the inner diameter of the opening.
As a further improvement of the above technical solution, a ratio of the inner diameter of the opening to the diameter of the inner circle is 425: 400.
As a further improvement of the technical scheme, 42 blades are arranged.
as a further improvement of the technical scheme, the inner radius R of the arc shape of the blade is 32.63 mm.
As a further improvement of the technical scheme, the height of the blade is 185 mm.
the centrifugal fan comprises a volute, wherein an air outlet and an air inlet are formed in the volute, the centrifugal fan also comprises a wind wheel, the wind wheel is arranged in the volute, a front disc is opposite to the air inlet, and an air collector is arranged at the air inlet.
as a further improvement of the above technical solution, the air outlet is vertical upwards, with the center of air intake as the original point and with the second rectangular coordinate system is established to air intake place plane, the positive direction of the axis of ordinates of second rectangular coordinate system with the orientation of air outlet is the same, the air outlet sets up the fourth quadrant of second rectangular coordinate system, the first quadrant, second quadrant, third quadrant, fourth quadrant of second rectangular coordinate system are provided with first square, second square, third square, fourth square respectively, two adjacent sides of four of first square, second square, third square, fourth square with the cross axis, the axis of ordinates of second rectangular coordinate system are collinear respectively, first square, second square, third square, fourth square keep away from the angle of second rectangular coordinate system do not make first circular arc as the dot, The second arc, the third arc and the fourth arc are adjacent to and tangent to the first arc, the second arc, the third arc and the fourth arc, the first arc, the second arc, the third arc and the fourth arc enclose the outer wall of the volute, and the air outlet direction of the air outlet is tangent to the fourth arc.
As a further improvement of the above technical solution, the side length ratio of the first square, the second square, the third square and the fourth square is 30.41: 35.9: 42.28: 49.88, and the ratio of the radii of the first circular arc, the second circular arc, the third circular arc and the fourth circular arc is 605.9: 513.7: 435.5: 369.2.
As a further improvement of the technical scheme, the air collector comprises a pipe body, the pipe body is arranged at the air inlet, the inner diameter of one end, close to the air inlet, of the pipe body is smaller than the inner diameter of one end, far away from the air inlet, of the pipe body, the ratio of the inner diameters of two ends of the pipe body to the length of the pipe body is 410:496:80, the first inner wall of the pipe body is arranged to be an arc surface, an arc opening of the arc surface faces back to the pipe body, and the radius of the arc is 50 mm.
The invention has the beneficial effects that: through the improvement to the wind wheel to can effectual reduction fan operation be the noise, improve the efficiency of fan operation.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is an exploded view of a centrifugal fan of the present invention;
FIG. 2 is a schematic view of the volute of the present invention;
Figure 3 is a partial cross-sectional view of a wind rotor of the present invention;
FIG. 4 is an isometric view of the air collector of the present invention;
figure 5 is an isometric view of a wind rotor of the present invention.
Detailed Description
the conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Referring to fig. 1-5, a wind wheel, includes foreplate 1, afterplate 2, foreplate 1 with the afterplate 2 is parallel to each other, foreplate 1 with be provided with a plurality of blade 3 between the afterplate 2, every blade 3 is perpendicular the afterplate 2, every blade 3 is the circular arc type setting, with the central axis circumference array setting of afterplate 2, use the center of afterplate 2 establishes first rectangular coordinate system 4 as the initial point, and the positive direction of first rectangular coordinate system 4 is upwards for the positive direction in the axis of ordinates, one on the right side of the axis of ordinates the blade 3 keep away from tip at the center of afterplate 2 with the initial point line of first rectangular coordinate system 4 is first line segment, first line segment with the contained angle beta 3 of axis of ordinates is 2.18, one on the positive direction right side of axis of first rectangular coordinate system 4 the line segment 3 is close to the tip at the center of afterplate 2 with the initial point of first rectangular coordinate system 4 is the second line segment, the second line segment with the contained angle beta 4 of axis of ordinates is 7.43, a plurality of blade 3 is kept away from the tip at 2 centers of after-disc encloses into the excircle, first line segment is crossing keeping away from of blade 3 the extension line of 2 one ends of after-disc with the tangent contained angle of excircle is air outlet angle beta 1, and air outlet angle beta 1 is 160, a plurality of blade 3 is close to the tip at 2 centers of after-disc encloses into interior circle, the second line segment with correspond the nodical point of blade 3 is called first nodical point, passes first nodical point the tangent line of blade 3 with the contained angle of the tangent line of interior circle is air inlet angle beta 2, air inlet angle beta 2 is 60.
Further as a preferred embodiment, the middle part of the front disc 1 is opened in an opening 5, and the diameter of the inner circle is smaller than the inner diameter of the opening 5.
further as a preferred embodiment, the ratio of the inner diameter of the opening 5 to the diameter of the inner circle is 425: 400. in practical use, the inner diameter of the opening 5 and the diameter of the inner circle are 425mm and 400mm respectively.
Further, as a preferred embodiment, 42 blades 3 are provided.
In a further preferred embodiment, the circular arc-shaped inner radius R of the blade 3 is 32.63 mm.
further as a preferred embodiment, the height of the blade 3 is 185 mm.
A centrifugal fan comprises a volute 6, wherein an air outlet 16 and an air inlet 15 are formed in the volute 6, the centrifugal fan further comprises a wind wheel, the wind wheel is arranged in the volute 6, a front disc 1 is opposite to the air inlet 15, and an air collector 17 is arranged at the air inlet 15.
Further as preferred embodiment, the air outlet 16 is vertical upwards, with the center of air intake 15 as the origin and with second rectangular coordinate system 7 is established to air intake 15 place plane, the positive direction of the axis of ordinates of second rectangular coordinate system 7 with the orientation of air outlet 16 is the same, the air outlet 16 sets up the fourth quadrant of second rectangular coordinate system 7, first quadrant, second quadrant, third quadrant, fourth quadrant of second rectangular coordinate system 7 are provided with first square 8, second square 9, third square 10, fourth square 11 respectively, two adjacent sides of four of first square 8, second square 9, third square 10, fourth square 11 with the cross axis, the axis of ordinates of second rectangular coordinate system 7 are collinear respectively, first square 8, second square 9, third square 10, The angle of the fourth square 11 away from the second rectangular coordinate system 7 is respectively used as a circular point to make a first circular arc 12, a second circular arc 13, a third circular arc 14 and a fourth circular arc, the first circular arc 12, the second circular arc 13, the third circular arc 14 and the fourth circular arc are adjacent to each other and tangent to each other, the first circular arc 12, the second circular arc 13, the third circular arc 14 and the fourth circular arc enclose the outer wall of the volute 6, and the air outlet direction of the air outlet 16 is tangent to the fourth circular arc.
in a further preferred embodiment, the side length ratio of the first square 8, the second square 9, the third square 10, and the fourth square 11 is 30.41: 35.9: 42.28: 49.88, the ratio of the radii of the first circular arc 12, the second circular arc 13, the third circular arc 14 and the fourth circular arc is 605.9: 513.7: 435.5: 369.2. in a practical design, the first square 8, the second square 9, the third square 10 and the fourth square 11 have side lengths of 30.41mm, 35.9mm, 42.28mm and 49.88mm, respectively.
Further as a preferred embodiment, the air collector 17 includes a pipe body, the pipe body is disposed at the air inlet 15, an inner diameter of one end of the pipe body close to the air inlet 15 is smaller than an inner diameter of one end of the pipe body far from the air inlet 15, a ratio of the inner diameters of two ends of the pipe body to a length of the pipe body is 410:496:80, an inner wall of the pipe body is disposed to be an arc surface, an arc opening 5 of the arc surface faces away from the pipe body, and a radius of the arc is 50 mm. In actual use, the inner diameter of the two ends of the pipe body and the length of the pipe body are respectively 410mm, 496mm and 80 mm. During the use, this body is just to air intake 15 setting, and the body inserts the air intake 15 from air intake 15 in, the great one end of body opening and air intake 15 parallel and level.
In order to further test the scheme, the GB/T1236-2000 'industrial ventilator-performance test by using a standardized air duct' is used as a basis in the test method of the aerodynamic performance of the ventilator. The ventilator noise measurements were made according to GB 2888-91 "Fan and Roots blower noise measurement methods". In the following tests, the atmospheric pressure Pa is 102018Pa, the atmospheric temperature ta is 17.28 ℃, the phase humidity RH is 0.708, and the diameter of the used wind wheel is 500 mm.
The wind wheel adopting the scheme and the volute 6 adopting the scheme are combined for testing, and the test data shown in the following table 1 are obtained.
Table 1:
the test using the conventional volute 6 in combination with a conventional wind wheel gave the test data as given in table 2 below.
Table 2:
The test is carried out by adopting the traditional volute 6 and the wind wheel combination of the scheme, and the test data shown in the following table 3 are obtained.
table 3:
the volute 6 adopting the scheme is combined with a traditional impeller to carry out tests, and the test data shown in the following table 4 are obtained.
Table 4:
By above-mentioned experimental data can obtain, when the spiral case 6 of this scheme and the wind wheel of this scheme make up the use, it is minimum to the ratio A sound level under each operating mode point that corresponds, under the condition that the produced volume flow of each operating mode point is equal, the impeller power of this scheme is minimum to the energy consumption of this scheme is minimum, and the fan efficiency of this scheme is better for the efficiency in other each tables moreover.
When the traditional volute 6 of wind wheel combination of this scheme is used, the fan performance that combines traditional volute 6 for traditional wind wheel promotes to some extent, and the noise is less than traditional volute 6 of traditional wind wheel combination, and fan efficiency is also higher than traditional volute 6 of traditional wind wheel combination in addition. However, the conventional wind wheel combination scheme is that the volute 6 is higher than the sound level A and the impeller power in comparison with the conventional volute 6 combined by the conventional wind wheel under the same working condition, and more energy consumption of the impeller is needed when the same volume flow is obtained.
However, when the spiral case 6 of this scheme and the wind wheel of this scheme make up the use, the ratio A sound level to each operating point that corresponds is minimum, under the condition that the produced volume flow of each operating point is equal, the impeller power of this scheme is minimum to the energy consumption of this scheme is minimum, and the fan efficiency of this scheme is better for the efficiency in other each tables moreover.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. The utility model provides a wind wheel, includes front disc (1), back plate (2), its characterized in that: antetheca (1) with the after-disc (2) is parallel to each other, antetheca (1) with be provided with a plurality of blade (3) between after-disc (2), every blade (3) are perpendicular after-disc (2), every blade (3) set up for the circular arc type, with the central axis circumference array setting of after-disc (2), with first rectangular coordinate system (4) is established for the original point in the center of after-disc (2), and the axis of ordinates of first rectangular coordinate system (4) upwards is the positive direction, one on axis of ordinates positive direction right side keep away from of blade (3) the tip at after-disc (2) center with the original point line of first rectangular coordinate system (4) is first line segment, first line segment with the contained angle beta 3 of axis of ordinates is 2.18, one on axis of first rectangular coordinate system (4) positive direction right side blade (3) are close to the tip at after-disc (2) center with the original point of first rectangular coordinate system (4) original point is close to the end of first rectangular coordinate system (4 The line of be the second line segment, the second line segment with the contained angle beta 4 of axis of ordinates is 7.43, a plurality of blade (3) are kept away from the tip at back plate (2) center encloses into the excircle, first line segment is crossing keeping away from of blade (3) the extension line of back plate (2) one end with the tangent contained angle of excircle is air outlet angle beta 1, and air outlet angle beta 1 is 160, a plurality of blade (3) are close to the tip at back plate (2) center encloses into the interior circle, the second line segment with correspond the nodical point of blade (3) is called first nodical point, passes first nodical the tangent line of blade (3) with the contained angle of the tangent line of interior circle is air inlet angle beta 2, air inlet angle beta 2 is 60.
2. A wind rotor according to claim 1, wherein: the middle part of the front disc (1) is arranged in the opening (5), and the diameter of the inner circle is smaller than the inner diameter of the opening (5).
3. A wind rotor according to claim 2, wherein: the ratio of the inner diameter of the opening (5) to the diameter of the inner circle is 425: 400.
4. A wind rotor according to claim 1, wherein: 42 blades (3) are arranged.
5. A wind rotor according to claim 1, wherein: the inner radius R of the arc of the blade (3) is 32.63 mm.
6. A wind rotor according to claim 1, wherein: the height of the blade (3) is 185 mm.
7. A centrifugal fan is characterized in that; the wind wheel comprises a volute (6), wherein an air outlet (16) and an air inlet (15) are formed in the volute (6), the wind wheel further comprises a wind wheel according to claim 1, the wind wheel according to claim 1 is arranged in the volute (6), the front disc (1) is opposite to the air inlet (15), and an air collector (17) is arranged at the air inlet (15).
8. The centrifugal fan according to claim 7, wherein: the air outlet (16) is vertical upwards, with the center of air intake (15) be the original point and with air intake (15) place plane establishes second rectangular coordinate system (7), the positive direction of the axis of ordinates of second rectangular coordinate system (7) with the orientation of air outlet (16) is the same, air outlet (16) set up the fourth quadrant of second rectangular coordinate system (7), first quadrant, second quadrant, third quadrant, fourth quadrant of second rectangular coordinate system (7) are provided with first square (8), second square (9), third square (10), fourth square (11) respectively, two adjacent sides of four of first square (8), second square (9), third square (10), fourth square (11) with the cross axis, the axis of ordinates of second rectangular coordinate system (7) are collinear respectively, the angles of the first square (8), the second square (9), the third square (10) and the fourth square (11) far away from the second rectangular coordinate system (7) are respectively used as round points to make a first circular arc (12), a second circular arc (13), a third circular arc (14) and a fourth circular arc, the first circular arc (12), the second circular arc (13), the third circular arc (14) and the fourth circular arc are adjacent to each other and tangent to each other, the first circular arc (12), the second circular arc (13), the third circular arc (14) and the fourth circular arc are encircled to form the outer wall of the volute (6), and the air outlet direction of the air outlet (16) is tangent to the fourth circular arc.
9. The centrifugal fan according to claim 8, wherein: the side length ratio of the first square (8), the second square (9), the third square (10) and the fourth square (11) is 30.41: 35.9: 42.28: 49.88, wherein the radius ratio of the first circular arc (12), the second circular arc (13), the third circular arc (14) and the fourth circular arc is 605.9: 513.7: 435.5: 369.2.
10. The centrifugal fan according to claim 7, wherein: the air collector (17) comprises a pipe body, the pipe body is arranged at the air inlet (15), the inner diameter of one end, close to the air inlet (15), of the pipe body is smaller than the inner diameter of one end, far away from the air inlet (15), of the pipe body, the ratio of the inner diameters of two ends of the pipe body to the length of the pipe body is 410:496:80, the first inner wall of the pipe body is arranged to be an arc surface, an arc opening (5) of the arc surface faces back to the pipe body, and the radius of the arc is 50 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910862701.9A CN110552910A (en) | 2019-09-12 | 2019-09-12 | Wind wheel and centrifugal fan |
| PCT/CN2020/089431 WO2021047199A1 (en) | 2019-09-12 | 2020-05-09 | Wind wheel and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910862701.9A CN110552910A (en) | 2019-09-12 | 2019-09-12 | Wind wheel and centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN110552910A true CN110552910A (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910862701.9A Pending CN110552910A (en) | 2019-09-12 | 2019-09-12 | Wind wheel and centrifugal fan |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110552910A (en) |
| WO (1) | WO2021047199A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112471037A (en) * | 2020-12-10 | 2021-03-12 | 珠海市现代农业发展中心(珠海市金湾区台湾农民创业园管理委员会、珠海市农渔业科研与推广中心) | Intelligent rail type bait casting machine |
| WO2021047199A1 (en) * | 2019-09-12 | 2021-03-18 | 佛山市南海九洲普惠风机有限公司 | Wind wheel and centrifugal fan |
| CN113202818A (en) * | 2021-05-21 | 2021-08-03 | 西安交通大学 | Inlet flow collecting device for centrifugal fan and centrifugal fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030012649A1 (en) * | 2001-07-16 | 2003-01-16 | Masaharu Sakai | Centrifugal blower |
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| CN110552910A (en) * | 2019-09-12 | 2019-12-10 | 佛山市南海九洲普惠风机有限公司 | Wind wheel and centrifugal fan |
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| CN107355422A (en) * | 2017-08-04 | 2017-11-17 | 广东美的制冷设备有限公司 | Centrifugal wind wheel and centrifugal blower |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021047199A1 (en) * | 2019-09-12 | 2021-03-18 | 佛山市南海九洲普惠风机有限公司 | Wind wheel and centrifugal fan |
| CN112471037A (en) * | 2020-12-10 | 2021-03-12 | 珠海市现代农业发展中心(珠海市金湾区台湾农民创业园管理委员会、珠海市农渔业科研与推广中心) | Intelligent rail type bait casting machine |
| CN113202818A (en) * | 2021-05-21 | 2021-08-03 | 西安交通大学 | Inlet flow collecting device for centrifugal fan and centrifugal fan |
| CN113202818B (en) * | 2021-05-21 | 2022-02-18 | 西安交通大学 | Inlet flow collecting device for centrifugal fan and centrifugal fan |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021047199A1 (en) | 2021-03-18 |
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