阅读说明：本技术 一种0.5毂比的轴流式风机 (Axial flow fan with 0.5 hub ratio ) 是由 林志良 唐秀文 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种0.5毂比的轴流式风机,包括机壳、电机和叶轮；所述电机通过电机筒安装于所述机壳内；所述叶轮通过轮毂与所述电机的输出轴连接,所述轮毂的直径与所述叶轮直径的比为1：2；所述叶轮由多片曲面状的叶片组成,所述叶片的中部与所述轮毂连接；所述叶片的曲面与所述叶片的中部的夹角α为18～25°；所述叶片的圆周截面厚度A为152～155mm。所述0.5毂比的轴流式风机,气流经过叶轮后,往所述机壳后方排风。所述电机带动所述叶轮旋转时,气流从进风口轴向进入叶轮,受到叶轮的推挤而使气流的能量升高,提高气流的流量、全压和静压,从而提高风速。(The invention discloses a 0.5 hub ratio axial flow fan which comprises a machine shell, a motor and an impeller, wherein the motor is arranged in the machine shell through a motor cylinder, the impeller is connected with an output shaft of the motor through a hub, the diameter ratio of the hub to the impeller is 1: 2, the impeller consists of a plurality of curved blades, the middle parts of the blades are connected with the hub, the included angle α between the curved surface of each blade and the middle part of each blade is 18-25 degrees, the circumferential section thickness A of each blade is 152-155 mm, the 0.5 hub ratio axial flow fan exhausts air after the air flow passes through the impeller, and when the motor drives the impeller to rotate, the air flow axially enters the impeller from an air inlet, and is pushed by the impeller to increase the energy of the air flow, the total pressure and the static pressure of the air flow, so that the air speed is increased.)

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 is composed of a plurality of curved blades, the middle parts of the blades are connected with the hub, the included angle α between the curved surfaces of the blades and the middle parts of the blades is 18-25 degrees, and the thickness A of the circumferential section of each 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.

Technical Field

The invention relates to the technical field of fans, in particular to an axial flow fan with a hub ratio of 0.5.

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.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention provides an axial flow fan with a 0.5 hub ratio, which can increase the flow rate, the full pressure and the static pressure of the air flow, thereby reducing the cost and the waste of electric energy.

In order to achieve the purpose, the invention adopts the following technical scheme: 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 is composed of a plurality of curved blades, the middle parts of the blades are connected with the hub, the included angle α between the curved surfaces of the blades and the middle parts of the blades is 18-25 degrees, and the thickness A of the circumferential section of each 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 the impeller is 998-999 mm, and the diameter of the casing is 1014-1015 mm

The invention has the beneficial effects that: 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 blade of the impeller is characterized in that the included angle α between the curved surface of the blade and the middle of the blade influences the path of wind current flowing through the surface of the blade, so that wind pressure is influenced, and unlike the existing fan impeller, the included angle α between the curved surface of the blade of the impeller and the middle of the blade is 18-25 degrees, so that the airflow flowing through the curved surface of the blade can obtain more energy, and the energy 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 block diagram of one embodiment of the present invention;

FIG. 2 is a front view of the impeller and hub in one embodiment of the present invention;

FIG. 3 is a right side view of the impeller and hub in one embodiment of the present invention;

FIG. 4 is a schematic 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 scheme of the invention is further explained by the specific implementation mode in combination with the attached 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, the middle parts of the blades 31 are connected with the hub 5, the included angle α between the curved surfaces of the blades 31 and the middle parts of the blades 31 is 18-25 degrees, and the circumferential section thickness A of the blades 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.

Unlike the conventional fan impeller, 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 current flowing through the surface of the blade 31, thereby affecting the wind pressure, and the angle α between the curved surface of the blade 31 of the impeller 3 and the middle of the blade 31 is 18-25 °, so that the wind current flowing through the curved surface of the blade 31 can obtain more energy and then be 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 in connection with 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 inventive effort, which would fall within the scope of the present invention.