CN216199226U - Double-layer multi-wing centrifugal fan impeller - Google Patents
Double-layer multi-wing centrifugal fan impeller Download PDFInfo
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- CN216199226U CN216199226U CN202122811572.6U CN202122811572U CN216199226U CN 216199226 U CN216199226 U CN 216199226U CN 202122811572 U CN202122811572 U CN 202122811572U CN 216199226 U CN216199226 U CN 216199226U
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Abstract
The utility model discloses a double-layer multi-wing centrifugal fan impeller which comprises a front disc, a rear disc, a hub, blades and a middle disc, wherein the hub is fixedly connected to the middle disc, the blades penetrate through and are fixed on the front disc, the middle disc and the rear disc, and the blades are supported by the front disc, the middle disc and the rear disc, so that the blades are installed in a certain size, the stability of the blades is improved, and the product performance is improved. The cross section of the blade comprises a first section of circular arc and a second section of circular arc, so that unreasonable flow channels between the blades are avoided, the separation loss generated by an impact angle is well inhibited, the effective flow area is increased, and the noise of the multi-wing centrifugal fan is reduced. The hub comprises a first connecting section, a second connecting section, a third connecting section and a fourth connecting section, wherein a bus of the first connecting section is a horizontal straight line, a bus of the second connecting section is a circular arc, a bus of the third connecting section is an inclined straight line, and a bus of the fourth connecting section is a horizontal straight line. The formation of local vortex is reduced, and the larger loss caused by clearance backflow is avoided.
Description
Technical Field
The utility model belongs to the technical field of range hoods, and particularly relates to a double-layer multi-wing centrifugal fan impeller.
Background
The multi-wing centrifugal fan is a driven fluid machine which can raise gas pressure and discharge gas by means of input mechanical energy. According to the principle of converting kinetic energy into potential energy, an impeller rotating at high speed is used for accelerating gas, then decelerating and changing the flow direction, so that kinetic energy is converted into potential energy (pressure). In a single stage centrifugal fan, the gas enters the impeller from an axial direction, changes to a radial direction as it flows through the impeller, and then enters the diffuser. In diffusers, the gas changes flow direction causing a deceleration which converts kinetic energy into pressure energy. The pressure increase occurs primarily in the impeller and secondarily in the diffusion process.
Fan wheel includes preceding circle, back circle, rim plate and a plurality of blade among the prior art, and the blade both ends are fixed respectively and circle in the front and back, specifically refer to the reference file name: a utility model of a centrifugal fan impeller (application number: CN200420114762.6) for a range hood. How to increase the stability of the blade is a technical problem that needs to be solved by a person skilled in the art when the distance between the front ring and the rear ring is long.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art, and provides the double-layer multi-wing centrifugal fan impeller, which has the advantages that the blades are supported by the front disc, the middle disc and the rear disc, the installation of the blades with certain sizes is met, the stability of the blades with set sizes is improved, and the product performance is improved.
In order to solve the technical problems, the utility model adopts the following technical scheme:
double-deck many wings centrifugal fan impeller, including front bezel, back plate, wheel hub and blade, its characterized in that still includes the well dish, wheel hub fixed connection is in the well dish, and the blade passes and fixes in front bezel, well dish and back plate, plays the supporting role to the blade through front bezel, well dish and back plate, accords with the installation of certain size blade, improves the stability of setting for size blade, improves and produces the property ability.
Further, the cross section of the blade comprises a first section of circular arc and a second section of circular arc, the installation angle of the inlet of the first section of circular arc is 40-60 degrees, preferably 50 degrees, and the installation angle of the outlet of the second section of circular arc is 150-170 degrees, preferably 163 degrees. The design of two sections of circular arcs is adopted, the design of excessive circular arc sections can be reduced, unreasonable flow passages among blades are avoided, the designed installation angles of the inlet of the first section of circular arc and the second section of circular arc outlet are reasonable, the separation loss generated by the attack angle is well inhibited, the effective flow area is increased, and the noise of the multi-wing centrifugal fan is reduced.
Furthermore, the first section of arc and the second section of arc are of an integrally formed structure, so that the blades can be conveniently manufactured in an integrally formed mode.
Further, the central angle of the first segment of circular arc is 20-30 degrees, preferably 23 degrees, and the central angle of the second segment of circular arc is 70-80 degrees, preferably 79 degrees.
Further, the hub comprises a first connecting section, a second connecting section, a third connecting section and a fourth connecting section, wherein a bus of the first connecting section is a horizontal straight line, a bus of the second connecting section is a circular arc, a bus of the third connecting section is an inclined straight line, and a bus of the fourth connecting section is a horizontal straight line. The formation of local vortex is reduced, and the larger loss caused by clearance backflow is avoided.
Furthermore, the first connecting section, the second connecting section, the third connecting section and the fourth connecting section are of an integrally formed structure, and the integrally formed structure is convenient to manufacture.
Further, the length of the bus of the first connecting section is 43mm, the center angle of the bus of the second connecting section is 90 degrees, the radius of the second connecting section is 24mm, the length of the bus of the third connecting section is 40mm, the included angle between the third connecting section and the horizontal line is 24 degrees, and the length of the bus of the fourth connecting section is 32 mm.
Furthermore, well dish and wheel hub be integrated into one piece structure, and the well dish of being convenient for and wheel hub integrated into one piece make, guarantee to have sufficient joint strength between well dish and the wheel hub simultaneously.
Further, the distance between the front disc and the middle disc is L1The distance between the middle disc and the rear disc is L2，L1/L2＝1.5～1.6。
Further, wheel hub is equipped with the through-hole, and the shape of through-hole includes two sections the same semicircle and two the same pitch arcs, and the radius of semicircle is 15mm, has increased the passageway of air current, can take out the heat and the moisture of gathering in range hood inside fast, improves the flow property of air, and the motor also has better heat dispersion simultaneously, can alleviate fan wheel's weight moreover.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects:
1. according to the utility model, the front disc, the middle disc and the rear disc support the blades, so that the installation of the blades with certain sizes is met, the stability of the blades with set sizes is improved, and the product performance is improved.
2. The utility model specifically designs the blades: the cross section of the blade comprises a first section of circular arc and a second section of circular arc, the installation angle of the inlet of the first section of circular arc is 40-60 degrees, preferably 50 degrees, the installation angle of the outlet of the second section of circular arc is 150-170 degrees, preferably 163 degrees. The design of two sections of circular arcs is adopted, the design of excessive circular arc sections can be reduced, unreasonable flow passages among blades are avoided, the designed installation angles of the inlet of the first section of circular arc and the second section of circular arc outlet are reasonable, the separation loss generated by the attack angle is well inhibited, the effective flow area is increased, and the noise of the multi-wing centrifugal fan is reduced.
3. The utility model specifically designs the wheel hub: the hub comprises a first connecting section, a second connecting section, a third connecting section and a fourth connecting section, wherein a bus of the first connecting section is a horizontal straight line, a bus of the second connecting section is a circular arc, a bus of the third connecting section is an inclined straight line, and a bus of the fourth connecting section is a horizontal straight line. The formation of local vortex is reduced, and the larger loss caused by clearance backflow is avoided.
Drawings
The utility model will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural view of a double-layer multi-wing centrifugal fan impeller of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of the distribution of blades according to the present invention;
FIG. 4 is a schematic view of a blade according to the present invention;
FIG. 5 is a side view of the present invention;
fig. 6 is a schematic structural view of the hub of the present invention.
In the figure, 1: a front plate; 2: a middle disc; 3: a rear disc; 4: a hub; 41: a first connection section; 42: a second connection section; 43: a third connection section; 44: a fourth connection section; 45: a first section of a semicircular arc; 46: a second section of a semicircular arc; 47: a first arc; 48: a second arc; 5: a blade; 51: a first arc; 52: and a second arc.
Detailed Description
As shown in fig. 1 to 6, the double-layer multi-wing centrifugal fan impeller of the present invention comprises a front disk 1, a rear disk 3, a hub 4, blades 5 and a middle disk 2, wherein the hub 4 is fixedly connected to the middle disk 2, the middle disk 2 and the hub 4 are integrally formed, so that the middle disk 2 and the hub 4 can be integrally formed, and meanwhile, the sufficient connection strength between the middle disk 2 and the hub 4 is ensured. Distance L between front plate 1 and middle plate 24Distance L between the middle disk 2 and the rear disk 35The distance between the front disk 1 and the middle disk 2 is generally 60 to 65mm, and the distance between the middle disk 2 and the rear disk 3 is generally 37.5 to 41 mm. The thicknesses of the front disc 1, the rear disc 3 and the middle disc 2 are all 0.7-1 mm, the front disc 1, the rear disc 3 and the middle disc 2 are of annular structures, and the ratio R of the inner diameter to the outer diameter1R2The number of the blades 5 is 60 to 72, and the number of the blades is 0.8 to 0.9.
The blade 5 passes and is fixed in preceding dish 1, well dish 2 and after-disc 3, plays the supporting role to blade 5 through preceding dish 1, well dish 2 and after-disc 3, accords with the installation of certain size blade 5, improves the stability of setting for size blade 5, improves product property ability.
The cross section of the blade 5 comprises a first arc 51 and a second arc 52, the first arc 51 has an inlet mounting angle alpha1Is 40 to 60 deg., preferably 50 deg., second arc 52 exit mounting angle alpha2Is 150 to 170 degrees, preferably 163 degrees. The design of two sections of circular arcs is adopted, the excessive design of the circular arcs can be reduced, the unreasonable flow channel between blades is avoided, the installation angle of the inlet of the first section of circular arc 51 and the installation angle of the outlet of the second section of circular arc 52 are reasonable, the separation loss generated by the attack angle is well inhibited, the effective flow area is increased, and the noise of the multi-wing centrifugal fan is reduced. The first arc 51 and the second arc 52 are integrally formed, so that the blade 5 can be integrally formed and manufactured conveniently. The central angle theta 1 of the first arc 51 is 20-30 degrees, preferably 23 degrees, and the central angle theta 2 of the second arc 52 is 70-80 degrees, preferably 79 degrees.
The overall thickness d of the hub 4 is 0.5mm, the hub 4 includes a first connection section 41, a second connection section 42, a third connection section 43, and a fourth connection section 44, a bus of the first connection section 41 is a horizontal straight line, a bus of the second connection section 42 is an arc, a bus of the third connection section 43 is an inclined straight line, and a bus of the fourth connection section 44 is a horizontal straight line. The formation of local vortex is reduced, and the larger loss caused by clearance backflow is avoided. The first connecting section 41, the second connecting section 42, the third connecting section 43 and the fourth connecting section 44 are of an integrally formed structure, so that the integrally formed structure is convenient to manufacture. Bus length L of first connection section 41143mm, a generatrix central angle theta 3 of the second connecting section 42 of 90 DEG, and a generatrix length L of the third connecting section 43 of radius 24mm240mm and at an angle theta 4 of 24 deg. to the horizontal, the generatrix length L of the fourth connecting section 443Is 32 mm.
The hub 4 is provided with four through holes, the shape of each through hole comprises two sections of same semicircular arcs and two sections of same arc lines, the radius of each semicircular arc is 15mm, the two sections of semicircular arcs are a first section of semicircular arc 45 and a second section of semicircular arc 46, and the radius of the first section of semicircular arc 45 and the radius of the second section of semicircular arc 46 are both 15 mm; the two identical arcs are a first arc 47 and a second arc 48. The channel of air current has been increased, can take out the heat and the moisture of gathering in range hood inside fast, improves the flow property of air, and the motor also has better heat dispersion simultaneously, can alleviate fan wheel's weight moreover.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (10)
1. Double-deck multi-wing centrifugal fan impeller includes:
a front plate;
a back plate;
a hub;
a blade;
it is characterized by also comprising:
the hub is fixedly connected with the middle disc, and the blades penetrate through and are fixed on the front disc, the middle disc and the rear disc.
2. The double-layer multi-wing centrifugal fan impeller of claim 1, wherein: the cross section of the blade comprises a first section of arc and a second section of arc, the installation angle of the inlet of the first section of arc is 40-60 degrees, and the installation angle of the outlet of the second section of arc is 150-170 degrees.
3. The double-layer multi-wing centrifugal fan impeller of claim 2, wherein: the first section of arc and the second section of arc are of an integrally formed structure.
4. The double-layer multi-wing centrifugal fan impeller of claim 2, wherein: the central angle of the first section of arc is 20-30 degrees, and the central angle of the second section of arc is 70-80 degrees.
5. The double-layer multi-wing centrifugal fan impeller of claim 1, wherein: the hub comprises a first connecting section, a second connecting section, a third connecting section and a fourth connecting section, wherein a bus of the first connecting section is a horizontal straight line, a bus of the second connecting section is an arc, a bus of the third connecting section is an inclined straight line, and a bus of the fourth connecting section is a horizontal straight line.
6. The double-layer multi-wing centrifugal fan impeller of claim 5, wherein: the first connecting section, the second connecting section, the third connecting section and the fourth connecting section are of an integrally formed structure.
7. The double-layer multi-wing centrifugal fan impeller of claim 5, wherein: the generating line length of first linkage segment is 43mm, the generating line central angle of second linkage segment is 90, and the radius is 24mm simultaneously, the generating line length of third linkage segment is 40mm, and the contained angle with the horizontal line simultaneously is 24, the generating line length of fourth linkage segment is 32 mm.
8. The double-layer multi-wing centrifugal fan impeller of claim 1, wherein: the central disc and the hub are of an integrally formed structure.
9. The double-layer multi-wing centrifugal fan impeller of claim 1, wherein: the distance between the front disc and the middle disc/the distance between the middle disc and the rear disc is 1.5-1.6.
10. The double-layer multi-wing centrifugal fan impeller of claim 1, wherein: the hub is provided with a through hole, and the shape of the through hole comprises two sections of same semicircular arcs and two same arc lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811572.6U CN216199226U (en) | 2021-11-17 | 2021-11-17 | Double-layer multi-wing centrifugal fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811572.6U CN216199226U (en) | 2021-11-17 | 2021-11-17 | Double-layer multi-wing centrifugal fan impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216199226U true CN216199226U (en) | 2022-04-05 |
Family
ID=80911330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122811572.6U Active CN216199226U (en) | 2021-11-17 | 2021-11-17 | Double-layer multi-wing centrifugal fan impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216199226U (en) |
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2021
- 2021-11-17 CN CN202122811572.6U patent/CN216199226U/en active Active
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Address after: No.138 Pudong Avenue, Pukou Economic Development Zone, Shengzhou City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Senge intelligent Kitchen Appliance Co.,Ltd. Address before: No.138 Pudong Avenue, Pukou Economic Development Zone, Shengzhou City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SENG ELECTRICAL Co.,Ltd. |