CN212177494U - Single-plate arc-shaped efficient mixed flow impeller - Google Patents
Single-plate arc-shaped efficient mixed flow impeller Download PDFInfo
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- CN212177494U CN212177494U CN202020888421.3U CN202020888421U CN212177494U CN 212177494 U CN212177494 U CN 212177494U CN 202020888421 U CN202020888421 U CN 202020888421U CN 212177494 U CN212177494 U CN 212177494U
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Abstract
The utility model discloses a single-plate arc-shaped efficient mixed flow impeller, which comprises a hub and fan blades, wherein the hub is a round platform, and a plurality of fan blades are uniformly and symmetrically arranged on the circumferential outer surface of the hub; the upper bottom surface of the hub is arranged at an air inlet of the impeller, the lower bottom surface of the hub is arranged at an air outlet of the impeller, and the diameter of the upper bottom surface of the hub is smaller than that of the lower bottom surface of the hub; the fan blades are arc-shaped, and the central lines of the fan blades are perpendicular to the central axis of the hub; the pressure line of the fan blade and the central line of the fan blade form a pressure included angle alpha, and the pressure included angle alpha is 35-40 degrees. The single-plate arc-shaped efficient mixed flow impeller is used for the mixed flow fan, and due to the structure of the hub and the fan blades and the value of the pressing included angle alpha, the flow, the full pressure and the efficiency of the mixed flow fan can be improved, and the use cost of a user is reduced.
Description
Technical Field
The utility model relates to a fan wheel technical field, especially a high-efficient mixed flow impeller of veneer arc.
Background
The fan is a machine for converting the mechanical energy of the prime motor into gas energy, the centrifugal fan forces the gas entering the centrifugal fan axially to rotate and centrifugally throw out, the mixed flow fan forces the gas entering the mixed flow fan axially to pressurize and flow out, and the mixed flow fan between the centrifugal fan and the mixed flow fan forces the gas to do centrifugal motion and axial motion.
The influence mixed flow fan quality is mainly the design parameter of impeller, and unmatched impeller can reduce mixed flow fan's flow, full pressure and efficiency, leads to user's use cost height, has increased the energy consumption.
SUMMERY OF THE UTILITY MODEL
To the above defect, the utility model aims to provide a high-efficient mixed flow impeller of veneer arc improves the flow, the total pressure and the efficiency of mixed flow fan.
To achieve the purpose, the utility model adopts the following technical proposal: a single-plate arc-shaped efficient mixed flow impeller comprises a hub and fan blades;
the fan blades are uniformly and symmetrically arranged on the circumferential outer surface of the hub;
the upper bottom surface of the hub is arranged at an air inlet of the impeller, the lower bottom surface of the hub is arranged at an air outlet of the impeller, and the diameter of the upper bottom surface of the hub is smaller than that of the lower bottom surface of the hub;
the fan blades are arc-shaped, and the central lines of the fan blades are perpendicular to the central axis of the hub; the pressure line of the fan blade and the central line of the fan blade form a pressure included angle alpha, and the pressure included angle alpha is 35-40 degrees.
Preferably, a generatrix of the hub and a central axis of the hub form a hub cone angle β, and the hub cone angle β is 15-20 °.
Preferably, the fan blade comprises a first arc surface, a second arc surface and a middle part of the fan blade, the middle part of the fan blade extends along the direction of the central line of the fan blade, the first arc surface and the second arc surface are respectively connected with two sides of the middle part of the fan blade and extend in the direction perpendicular to the central line of the fan blade, and the extending directions of the first arc surface and the second arc surface are opposite.
Preferably, the press-forming radius A of the first cambered surface and the second cambered surface is 620-630 mm.
Preferably, an included angle formed by a connecting line of the center of the first cambered surface and the center of the second cambered surface of the fan blade and a radial plane perpendicular to the central axis of the hub is a fan blade angle theta, and the fan blade angle theta is 25-35 degrees.
Preferably, the number of the fan blades is 8.
Preferably, a flow guide cover is arranged on the outer side of the upper bottom surface of the hub.
The utility model has the advantages that: the single-plate arc-shaped efficient mixed flow impeller is used for the mixed flow fan, and due to the structure of the hub and the fan blades and the value of the pressing included angle alpha, the flow, the full pressure and the efficiency of the mixed flow fan can be improved, and the use cost of a user is reduced.
The distance between the fan blades arranged on the circumferential outer surface of the hub and the wall of the mixed flow fan is gradually reduced from the air inlet to the air outlet, air flow enters from the air inlet and then reaches the air outlet after passing through a gap between the fan blades and the wall of the mixed flow fan, and the flow and the total pressure of the air flow are improved, so that the efficiency of the fan is improved.
The arc-shaped structure of the fan blade can further enhance the flow, the full pressure and the efficiency of the mixed flow fan.
And the pressing included angle alpha of 35-40 degrees enables the wind flow flowing through the fan blade to obtain more energy, and further improves the flow, the total pressure and the efficiency of the mixed flow fan.
Drawings
Fig. 1 is a left side view of an embodiment of the present invention;
fig. 2 is a front view of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fan blade in an embodiment of the present invention;
fig. 4 is a schematic structural view of a wheel hub according to an embodiment of the present invention;
wherein: 1, a hub; 2, fan blades; 3, a flow guide cover; 21 a first cambered surface; 22 a second arc surface; 23, the middle part of the blade; 24 fan blade central lines; 25 to shape the wire.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1-4, a single-plate arc-shaped efficient mixed-flow impeller comprises a hub 1 and a fan blade 2;
the hub 1 is a circular truncated cone, and the fan blades 2 are uniformly and symmetrically arranged on the circumferential outer surface of the hub 1;
the upper bottom surface of the hub 1 is arranged at an air inlet of the impeller, the lower bottom surface of the hub 1 is arranged at an air outlet of the impeller, and the diameter of the upper bottom surface of the hub 1 is smaller than that of the lower bottom surface of the hub 1;
the fan blade 2 is arc-shaped, and a fan blade central line 24 of the fan blade 2 is perpendicular to the central axis of the hub 1; the pressure line 25 of the fan blade 2 and the fan blade central line 24 form a pressure included angle alpha, and the pressure included angle alpha is 35-40 degrees.
The single-plate arc-shaped efficient mixed flow impeller is used for a mixed flow fan, and due to the structure of the hub 1 and the fan blades 2 and the value of the pressure-shaped included angle alpha, the flow, the full pressure and the efficiency of the mixed flow fan can be improved, and the use cost of a user is reduced.
Because the upper bottom surface of the air inlet of the hub 1 is small, the lower bottom surface of the air outlet of the hub 1 is large, the distance between the fan blade 2 arranged on the circumferential outer surface of the hub 1 and the wall of the air duct of the mixed flow fan is gradually reduced from the air inlet to the air outlet, after entering from the air inlet, the air flow passes through the gap between the fan blade 2 and the wall of the air duct of the mixed flow fan and then reaches the air outlet, the flow and the total pressure of the air flow are improved, and therefore the efficiency of the fan is improved.
The arc-shaped structure of the fan blade 2 can further enhance the flow, the total pressure and the efficiency of the mixed flow fan.
The pressing included angle alpha of 35-40 degrees enables the air flow flowing through the fan blade 2 to obtain more energy, and further improves the flow, the total pressure and the efficiency of the mixed flow fan.
Preferably, a generatrix of the hub 1 and a central axis of the hub 1 form a hub cone angle β, and the hub cone angle β is 15-20 °.
The hub cone angle beta influences the change rate of the section area of the hub 1 perpendicular to the central axis of the hub 1, so that the reduction rate of the distance between the fan blade 2 and the wall of the mixed flow fan is influenced, and the flow, the total pressure and the efficiency of the wind flow generated by the mixed flow fan are further influenced.
Preferably, the fan blade 2 includes a first arc surface 21, a second arc surface 22 and a blade middle portion 23, the blade middle portion 23 extends along the direction of the fan blade center line 23, the first arc surface 21 and the second arc surface 22 are respectively connected with two sides of the blade middle portion 23 and extend in the direction perpendicular to the fan blade center line 23, and the extending directions of the first arc surface 21 and the second arc surface 22 are opposite.
Compared with the fan blade with only one cambered surface, the fan blades 2 with two cambered surfaces have longer cambered surface distances of the fan blades on the same bus length of the hub 1, namely the distance of the wind flow flowing through the cambered surfaces of the fan blades is increased, so that the energy obtained by the wind flow is improved, and the flow, the full pressure and the efficiency of the mixed flow fan are further improved.
Preferably, the press radius A of the first cambered surface 21 and the second cambered surface 22 is 620-630 mm.
The size of the profiling radius A is represented by the bending degree of the first cambered surface 21 and the second cambered surface 22, and the size of the profiling radius A influences the flow, the full pressure and the efficiency of the mixed flow fan.
Preferably, an included angle formed by a connecting line of the center of the first cambered surface 21 and the center of the second cambered surface 22 of the fan blade 2 and a radial plane perpendicular to the central axis of the hub 1 is a fan blade angle theta, and the fan blade angle theta is 25-35 degrees.
The wind quantity generated when the impeller rotates is influenced by the angle theta of the fan blades, so that the flow, the full pressure and the efficiency of the high mixed flow fan are influenced.
Preferably, the number of the fan blades 2 is 8.
The quantity of the fan blades 2 influences the air quantity generated when the impeller rotates, so that the flow, the total pressure and the efficiency of the mixed flow fan are influenced.
Preferably, a flow guide cover 3 is arranged on the outer side of the upper bottom surface of the hub 1.
The air guide sleeve 3 enables air inlet conditions to be more perfect and reduces noise of the impeller.
Because same fan can all demonstrate different performance under different operating modes, carry out data measurement under different operating modes to the mixed flow fan of using current impeller, measured data is as shown in table 1:
table 1:
similarly, the single-plate arc-shaped efficient mixed-flow impeller of the present embodiment is applied to the mixed-flow fan for measurement under the same working condition, and the measured data is shown in table 2:
table 2:
comparing the data in table 1 and table 2, under the same working condition, the flow, total pressure and efficiency of the mixed-flow fan applying the single-plate arc-shaped efficient mixed-flow impeller of the embodiment are all higher than those of the mixed-flow fan applying the impeller in the prior art.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (7)
1. The utility model provides a high-efficient mixed flow impeller of veneer arc, includes wheel hub and fan blade, its characterized in that:
the fan blades are uniformly and symmetrically arranged on the circumferential outer surface of the hub;
the upper bottom surface of the hub is arranged at an air inlet of the impeller, the lower bottom surface of the hub is arranged at an air outlet of the impeller, and the diameter of the upper bottom surface of the hub is smaller than that of the lower bottom surface of the hub;
the fan blades are arc-shaped, and the central lines of the fan blades are perpendicular to the central axis of the hub; the pressure line of the fan blade and the central line of the fan blade form a pressure included angle alpha, and the pressure included angle alpha is 35-40 degrees.
2. The single-plate arc-shaped efficient mixed-flow impeller according to claim 1, characterized in that: the bus of the hub and the central axis of the hub form a hub cone angle beta, and the hub cone angle beta is 15-20 degrees.
3. The single-plate arc-shaped efficient mixed-flow impeller according to claim 2, characterized in that: the fan blade comprises a first cambered surface, a second cambered surface and a middle blade part, the middle blade part extends along the direction of the central line of the fan blade, the first cambered surface and the second cambered surface are respectively connected with two sides of the middle blade part and extend in the direction perpendicular to the central line of the fan blade, and the extending directions of the first cambered surface and the second cambered surface are opposite.
4. The single-plate arc-shaped efficient mixed-flow impeller according to claim 3, characterized in that: the press-forming radius A of the first cambered surface and the second cambered surface is 620-630 mm.
5. The single-plate arc-shaped efficient mixed-flow impeller according to claim 4, characterized in that: an included angle formed by a connecting line of the center of the first cambered surface and the center of the second cambered surface of the fan blade and a radial plane perpendicular to the central axis of the hub is a fan blade angle theta which is 25-35 degrees.
6. The single-plate arc-shaped efficient mixed-flow impeller according to claim 5, characterized in that: the number of the fan blades is 8.
7. The single-plate arc-shaped efficient mixed-flow impeller according to claim 6, characterized in that: and a flow guide cover is arranged on the outer side of the upper bottom surface of the hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020888421.3U CN212177494U (en) | 2020-05-25 | 2020-05-25 | Single-plate arc-shaped efficient mixed flow impeller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020888421.3U CN212177494U (en) | 2020-05-25 | 2020-05-25 | Single-plate arc-shaped efficient mixed flow impeller |
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| CN212177494U true CN212177494U (en) | 2020-12-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412835A (en) * | 2022-03-31 | 2022-04-29 | 佛山市南海九洲普惠风机有限公司 | Crescent forward and backward air supply impeller without disassembly |
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2020
- 2020-05-25 CN CN202020888421.3U patent/CN212177494U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412835A (en) * | 2022-03-31 | 2022-04-29 | 佛山市南海九洲普惠风机有限公司 | Crescent forward and backward air supply impeller without disassembly |
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