CN212177503U - Axial flow fan with 0.5 hub ratio - Google Patents
Axial flow fan with 0.5 hub ratio Download PDFInfo
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- CN212177503U CN212177503U CN202020889176.8U CN202020889176U CN212177503U CN 212177503 U CN212177503 U CN 212177503U CN 202020889176 U CN202020889176 U CN 202020889176U CN 212177503 U CN212177503 U CN 212177503U
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Abstract
The utility model discloses an axial flow fan with 0.5 hub ratio, which comprises a casing, a motor and an impeller; the motor is arranged in the shell through a motor cylinder; the impeller is connected with an output shaft of the motor through a hub, and the ratio of the diameter of the hub to the diameter of the impeller is 1: 2; the impeller consists of a plurality of curved blades, and the middle parts of the blades are connected with the hub; the included angle alpha between the curved surface of the blade and the middle part of the blade is 18-25 degrees; the thickness A of the circumferential section of the blade is 152-155 mm. And the axial flow fan with the hub ratio of 0.5 exhausts air to the rear of the shell after the air flow passes through the impeller. When the motor drives the impeller to rotate, airflow enters the impeller from the axial direction of the air inlet, and is pushed by the impeller to increase the energy of the airflow, so that the flow, the total pressure and the static pressure of the airflow are improved, and the air speed is increased.
Description
Technical Field
The utility model relates to a fan technical field, especially an axial-flow fan of 0.5 hub ratio.
Background
The axial flow fan has a wide application range, the airflow of the axial flow fan is in the same direction as the axial direction of the fan blades, such as an electric fan, and an air conditioner external unit fan is an axial flow type running fan. The "axial flow" is so called because the airflow flows parallel to the fan axis. Axial fans with a 0.5 hub ratio are typically used in applications where the flow requirements are high and the pressure requirements are low. The 0.5 hub ratio axial flow fan has a simple structure but has a very high data requirement, and can be used for ventilation in general factories, warehouses, offices, houses and the like, and can also be used for air coolers (air coolers), evaporators, condensers, sprayers and the like.
The flow, the full pressure and the static pressure of the fan are important parameters influencing the quality of the fan, the existing axial flow fan with 0.5 hub ratio has low flow, full pressure and static pressure, the air speed of an air pipe with the same section is low, the suction force of the fan is not enough, and a user needs to select a fan with a larger model and a higher power, so that the cost is increased and electricity is wasted.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings, an object of the present invention is to provide an axial flow fan with a hub ratio of 0.5, which can improve the flow rate, total pressure and static pressure of the air flow, thereby reducing the cost and the waste of electric energy.
To achieve the purpose, the utility model adopts the following technical proposal: a0.5 hub ratio axial fan comprising a housing, a motor and an impeller;
the motor is arranged in the shell through a motor cylinder;
the impeller is connected with an output shaft of the motor through a hub, and the ratio of the diameter of the hub to the diameter of the impeller is 1: 2;
the impeller consists of a plurality of curved blades, and the middle parts of the blades are connected with the hub; the included angle alpha between the curved surface of the blade and the middle part of the blade is 18-25 degrees; the thickness A of the circumferential section of the blade is 152-155 mm.
Preferably, the impeller is provided with 8 blades, and the blades are symmetrically arranged on the circumferential outer surface of the hub.
Preferably, an air inlet inside the casing is provided with a fairing, an air outlet inside the casing is provided with a rectifier, the fairing is fixed at the front end of the impeller and rotates along with the impeller, and the rectifier is fixed at the rear end of the motor barrel; the fairing is semi-spherical, and the fairing is frusto-conical.
Preferably, be equipped with the stator of S type between casing inner wall and the motor section of thick bamboo outer surface, the stator is along the surface circumference evenly distributed of motor section of thick bamboo, the mid portion of stator is followed the both ends of the cross axle direction of casing are equipped with first cambered surface and second cambered surface respectively.
Preferably, the first cambered surface and the second cambered surface of stator respectively with the middle part's of stator contained angle is 17 ~ 25.
Preferably, the number of the guide vanes arranged between the inner wall of the machine shell and the outer surface of the motor cylinder is 8.
Preferably, the distance B from the middle part of the blade of the impeller to the connection part of the hub and the output shaft of the motor is 58-59 mm.
Preferably, the diameter of impeller is 998 ~ 999mm, the diameter of casing is 1014 ~ 1015mm the beneficial effects of the utility model: and the axial flow fan with the hub ratio of 0.5 exhausts air to the rear of the shell after the air flow passes through the impeller. When the motor drives the impeller to rotate, airflow enters the impeller from the axial direction of the air inlet, and is pushed by the impeller to increase the energy of the airflow, so that the flow, the total pressure and the static pressure of the airflow are improved, and the air speed is increased.
The angle alpha between the curved surface of the blade of the impeller and the middle of the blade affects the path of the wind flow flowing over the surface of the blade, thereby affecting the wind pressure. Different from the existing fan impeller, the included angle alpha between the curved surface of the blade of the impeller and the middle part of the blade is 18-25 degrees, so that more energy can be acquired by airflow flowing through the curved surface of the blade, and the airflow is converted into wind speed.
The circumferential section thickness A of the blade of the impeller influences the time and the distance of the wind flow flowing through the surface of the blade 31, and is different from the existing fan impeller in that the circumferential section thickness A of the blade of the impeller is 152-155 mm, so that the air flow flowing through the curved surface of the blade can acquire more energy and is converted into the wind speed.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
FIG. 2 is an elevation view of an impeller and hub in an embodiment of the present invention;
FIG. 3 is a right side view of the impeller and hub in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a blade according to an embodiment of the present invention;
wherein: 1, a machine shell; 2, a motor; 3, an impeller; 4 a motor barrel; 5, a hub; 11 a cowling; 12 a rectifier body; 31 blades; a guide vane 41.
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 to 4, a 0.5 hub ratio axial flow fan includes a casing 1, a motor 2 and an impeller 3;
the motor 2 is arranged in the machine shell 1 through a motor barrel 4;
the impeller 3 is connected with an output shaft of the motor 2 through a hub 5, and the ratio of the diameter of the hub 5 to the diameter of the impeller 3 is 1: 2;
the impeller 3 is composed of a plurality of curved blades 31, and the middle parts of the blades 31 are connected with the hub 5; an included angle alpha between the curved surface of the blade 31 and the middle of the blade 31 is 18-25 degrees; the circumferential section thickness A of the blade 31 is 152-155 mm.
The axial flow fan with the hub ratio of 0.5 exhausts air to the back of the casing 1 after the air flow passes through the impeller 3. When the motor 2 drives the impeller 3 to rotate, airflow enters the impeller 3 from the axial direction of the air inlet, and is pushed by the impeller 3 to increase the energy of the airflow, so that the flow, the total pressure and the static pressure of the airflow are increased, and the air speed is increased.
The angle α between the curved surface of the blade 31 of the impeller 3 and the middle of the blade 31 affects the path of the wind flow flowing over the surface of the blade 31, thereby affecting the wind pressure. Different from the existing fan impeller, the included angle alpha between the curved surface of the blade 31 of the impeller 3 and the middle part of the blade 31 is 18-25 degrees, so that the airflow flowing through the curved surface of the blade 31 can obtain more energy and is converted into the wind speed.
The circumferential section thickness A of the blade 31 of the impeller 3 influences the time and the distance of the wind flow flowing through the surface of the blade 31, and unlike the existing fan impeller, the circumferential section thickness A of the blade 31 of the impeller 3 is 152-155 mm, so that the air flow flowing through the curved surface of the blade 31 can obtain more energy and is converted into the wind speed.
Preferably, the impeller 3 is provided with 8 blades 31, and the blades 31 are symmetrically arranged on the circumferential outer surface of the hub 5.
The 8 blades 31 are symmetrically arranged on the circumferential outer surface of the hub 5, so that the wind speed of wind flow in the casing 1 can be kept uniform during rotation, and the fan cannot be unbalanced due to overlarge wind speed of local wind flow.
Preferably, an air inlet inside the casing 1 is provided with a fairing 11, an air outlet inside the casing 1 is provided with a rectifier 12, the fairing 11 is fixed at the front end of the impeller 3 and rotates with the impeller 3, and the rectifier 12 is fixed at the rear end of the motor barrel 4; the fairing 11 is semi-spherical and the fairing 12 is frusto-conical.
The said fairing 11 is a semi-sphere, the said fairing 12 is a truncated cone and gradually shrinks along the direction of the air outlet, and the end of the said fairing 12 is arc, make the air intake condition more perfect, reduce the noise of the blower, the said fairing 11 mounted in front of the said impeller 3 forms the fire-fighting tunnel of axial flow type, the said axial flow blower of 0.5 hub ratio enters the air from the direction of the air inlet, retrieve the rotational kinetic energy and transform into the total pressure through fairing 11 and impeller 3, improve the air current flowrate, total pressure and static pressure through the fairing 12.
Preferably, be equipped with the stator 41 of S type between casing 1 inner wall and the motor section of thick bamboo 4 surface, stator 41 is along the surface circumference evenly distributed of motor section of thick bamboo 4, the mid portion of stator 41 is followed the both ends of the horizontal axis direction of casing 1 are equipped with first cambered surface and second cambered surface respectively.
The S-shaped structure of the guide vane 41 can change the deflected airflow into axial flow, and simultaneously guide the airflow into the air outlet, further convert the kinetic energy of the airflow into pressure energy, so that the ventilation effect is obvious and safe, and the air can be sent to a designated area.
Preferably, the first cambered surface and the second cambered surface of the guide vane 41 respectively form an included angle of 17-25 degrees with the middle part of the guide vane 41.
When the included angle between the first cambered surface and the second cambered surface of the guide vane 41 and the middle part of the guide vane 41 is 17-25 degrees, the guide effect of the guide vane 41 is optimal, and the deflected airflow can be effectively changed into axial flow.
Preferably, the number of the guide vanes 41 arranged between the inner wall of the machine shell 1 and the outer surface of the motor cylinder 4 is 8.
The number of the guide vanes 41 corresponds to the number of the blades 31 of the impeller 3, when the impeller 3 rotates, the airflow enters the impeller 3 from the air inlet in the axial direction, the energy of the airflow is increased by being pushed by the impeller 3, then the airflow flows into the guide vanes 41, the guide vanes 41 change the deflected airflow into axial flow, and simultaneously the airflow is guided into the air outlet, so that the kinetic energy of the airflow is further converted into pressure energy.
Preferably, the distance B from the middle part of the blade 31 of the impeller 3 to the connection part of the hub 5 and the output shaft of the motor 2 is 58-59 mm.
When the distance B is 58-59 mm, the deflected airflow blown out from the impeller 3 can accurately fall on the first cambered surface of the guide vane 41 close to the impeller 3, so that the flow guiding effect of the guide vane 41 is improved, and the deflected airflow can be effectively changed into axial flow.
Preferably, the diameter of the impeller 3 is 998-999 mm, and the diameter of the casing 1 is 1014-1015 mm.
The diameter of the impeller 3 is matched with that of the casing 1, so that gaps between the impeller 3 and the casing 1 are reduced, and the flow, the total pressure and the static pressure of airflow are improved, so that the wind speed is improved.
Because same fan can all demonstrate different performance under different work condition, carry out data measurement to current axial-flow fan under different work condition, measured data is as shown in table 1:
table 1:
similarly, the measured data for the 0.5 hub ratio axial flow fan of the present embodiment under the same operating conditions are shown in table 2:
table 2:
comparing the data in tables 1 and 2, the flow rate, full pressure and static pressure of the present embodiment are all higher than those of the axial flow fan in the prior art under the same power.
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 (8)
1. A0.5 hub ratio axial fan comprising a housing, a motor and an impeller; the method is characterized in that:
the motor is arranged in the shell through a motor cylinder;
the impeller is connected with an output shaft of the motor through a hub, and the ratio of the diameter of the hub to the diameter of the impeller is 1: 2;
the impeller consists of a plurality of curved blades, and the middle parts of the blades are connected with the hub; the included angle alpha between the curved surface of the blade and the middle part of the blade is 18-25 degrees; the thickness A of the circumferential section of the blade is 152-155 mm.
2. A 0.5 hub ratio axial fan in accordance with claim 1, wherein: the impeller is equipped with 8 the blade, the blade symmetry is located the circumference surface of wheel hub.
3. A 0.5 hub ratio axial fan in accordance with claim 2, wherein:
the air inlet inside the shell is provided with a fairing, the air outlet inside the shell is provided with a rectifier, the fairing is fixed at the front end of the impeller and rotates along with the impeller, and the rectifier is fixed at the rear end of the motor barrel; the fairing is semi-spherical, and the fairing is frusto-conical.
4. A 0.5 hub ratio axial fan in accordance with claim 3, wherein:
be equipped with the stator of S type between casing inner wall and the motor section of thick bamboo outer surface, the stator is along the surface circumference evenly distributed of motor section of thick bamboo, the mid portion of stator is followed the both ends of the cross axle direction of casing are equipped with first cambered surface and second cambered surface respectively.
5. A0.5 hub ratio axial fan in accordance with claim 4, wherein: the first cambered surface and the second cambered surface of stator respectively with the contained angle of the middle part of stator is 17 ~ 25.
6. A0.5 hub ratio axial fan in accordance with claim 5, wherein:
the number of the guide vanes arranged between the inner wall of the shell and the outer surface of the motor cylinder is 8.
7. A0.5 hub ratio axial fan in accordance with claim 6, wherein:
and the distance B from the middle part of the blade of the impeller to the joint of the hub and the output shaft of the motor is 58-59 mm.
8. A 0.5 hub ratio axial fan in accordance with claim 7, wherein:
the diameter of impeller is 998 ~ 999mm, the diameter of casing is 1014 ~ 1015 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020889176.8U CN212177503U (en) | 2020-05-25 | 2020-05-25 | Axial flow fan with 0.5 hub ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020889176.8U CN212177503U (en) | 2020-05-25 | 2020-05-25 | Axial flow fan with 0.5 hub ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212177503U true CN212177503U (en) | 2020-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020889176.8U Active CN212177503U (en) | 2020-05-25 | 2020-05-25 | Axial flow fan with 0.5 hub ratio |
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| Country | Link |
|---|---|
| CN (1) | CN212177503U (en) |
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2020
- 2020-05-25 CN CN202020889176.8U patent/CN212177503U/en active Active
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