CN108612671A - Fan wheel structure - Google Patents

Abstract

The invention provides a fan wheel structure, which comprises a hub, a plate body and a plurality of blades, wherein the plate body is annularly arranged on the outer periphery of the hub and is provided with an upper side surface and a lower side surface, the plurality of blades are annularly arranged on the upper side surface of the plate body, the plurality of blades are provided with a connecting end and a free end, the connecting end is connected with the outer periphery of the hub, each blade is provided with a backward inclined section, a middle section and a forward inclined section, the backward inclined section is adjacent to the connecting end and is connected with the upper side surface of the plate body, the forward inclined section is adjacent to the free end, the middle section is connected with the backward inclined section and the forward inclined section, and each two backward inclined sections and the upper side surface of the plate body form an.

Description

Fan wheel structure

technical field

The invention relates to a fan wheel structure, in particular to a fan wheel structure capable of reducing vibration and noise during fan operation.

Background technique

In the field of heat dissipation, the existing centrifugal fan enters air from the axial direction and then discharges air from the side to dissipate heat. Existing centrifugal fans can be divided into backward inclined type and forward inclined type according to the angle between the blade angle of the fan wheel and the tangent line of the outlet direction. The forward-leaning blades are inclined towards the direction of rotation, the angle between the blade angle and the tangent line of the outlet direction is greater than 90 degrees, the radial direction of the blades is short, the air volume is large, the wind speed is fast, and the noise is also large. The inclination direction of the backward inclined blade is opposite to the direction of rotation, the angle between the blade angle and the tangent of the outlet direction is less than 90 degrees, the radial direction of the blade is longer, and the outlet speed is lower, which can generate greater wind pressure.

However, under the same fan speed and the same outer diameter of the blades, the forward-leaning blades can output a larger air volume and provide a better heat dissipation effect, but also increase the load on the motor. However, at the same speed, the backward inclined blade has a small air volume and the heat dissipation effect is worse than that of the forward inclined blade. The backward inclined blade can only achieve the same air volume and heat dissipation effect as the forward inclined blade when the speed is increased. Therefore, the noise generated by the backward inclined blade is relatively more increased.

In addition, after the airflow of the existing centrifugal fan enters the air from the axial direction, a part of the airflow is driven by the fan blades and exits from the side, and the other part of the airflow will pass through the blades and hit the fan base or frame before bouncing back to the hub And near the blades, this will not only cause insufficient lateral air flow, but the rebounding airflow will also have a negative impact on fan noise and vibration.

Therefore, how to increase the air volume and pressure of the fan, reduce the vibration and shaking of the blades during operation, and reduce the vibration and noise caused by the airflow passing through the blades and hitting the fan base or frame. The direction to work hard.

Contents of the invention

One object of the present invention is to increase the air volume and air pressure of the fan, and reduce the vibration and shaking of the blades during operation.

Another object of the present invention is to reduce the vibration and noise generated by the airflow passing through the blades and hitting the fan base or frame.

In order to achieve the above object, the present invention provides a fan wheel structure, which is characterized by comprising:

A hub has a plate body and a plurality of blades, the plate body ring is set on the outer periphery of the hub and has an upper side and a lower side surface, the plurality of blade rings are set on the upper side of the plate body, and the plurality of blades have a connecting end and a free end, the connecting end is connected to the outer periphery of the hub, each blade has a backward inclined section, a middle section and a forward inclined section, the backward inclined section is adjacent to the connecting end and connected to the upper side of the plate body, The forward inclined section is adjacent to the free end, the middle section connects the backward inclined section and the forward inclined section, and every two backward inclined sections form an air flow channel with the upper side of the board body.

Said fan wheel structure, wherein: each blade has an upper surface and a lower surface, and the upper surface and lower surface extend from the connecting end to the free end.

The fan wheel structure, wherein: the hub also has a ring body, the ring body has an upper end surface and a lower end surface, the ring body is connected to the plurality of blades, and the upper end surface of the ring body is connected to the upper end surface of the plurality of blades The surfaces are coplanar.

Said fan wheel structure, wherein: the ring body is connected with the plurality of blades at the position of the middle section.

Said fan wheel structure, wherein: the ring body is connected to the plurality of blades at the position of the forward inclination section, and an outer diameter surface of the ring body is coplanar with the free ends of the plurality of blades.

With the design of the present invention, the vibration and shaking of the blades during operation can be reduced while increasing the air volume and air pressure of the fan, and the vibration and noise caused by the airflow passing through the blades and hitting the fan base or frame can be reduced. .

Description of drawings

Fig. 1 is the three-dimensional schematic view of the first embodiment of the fan wheel structure of the present invention;

Fig. 2 is a schematic perspective view of a second embodiment of the fan wheel structure of the present invention;

Fig. 3 is a schematic perspective view of a third embodiment of the fan wheel structure of the present invention.

Explanation of reference numerals: fan wheel structure 10; hub 100; plate body 110; upper side 111; lower side 112; blade 120; connecting end 121; free end 122; Upper surface 126 ; lower surface 127 ; airflow channel 130 ; annulus 140 ; upper end surface 141 ; lower end surface 142 ; outer diameter surface 143 ;

Detailed ways

The above-mentioned purpose of the present invention and its structural and functional characteristics will be described according to the preferred embodiments of the accompanying drawings.

Please refer to FIG. 1 , which is a perspective view of the first embodiment of the fan wheel structure of the present invention. As shown in the figure, the fan wheel structure 10 of the present invention includes a hub 100 , and the arrow F indicates the rotation direction of the hub 100 .

The hub 100 has a plate body 110 and a plurality of blades 120 . The plate body 110 is disposed around the outer periphery of the hub 100 , and has an upper side 111 and a lower side 112 respectively disposed on upper and lower sides of the plate body 110 . The plurality of blades 120 are disposed on the upper side 111 of the plate body 110 in an annular radial manner, and the plurality of blades 120 have a connecting end 121 and a free end 122 respectively disposed at two ends of each blade 120 .

The connecting end 121 is connected to the outer periphery of the hub 100, each blade 120 has a backward inclined section 123, a middle section 124 and a forward inclined section 125, the backward inclined section 123 is adjacent to the connecting end 121 and connected to the plate On the upper side 111 of the body 110, the forward inclined section 125 is adjacent to the free end 122, and the middle section 124 is connected to the backward inclined section 123 and the forward inclined section 125. The side 111 forms an air flow channel 130 .

Moreover, each blade 120 has an upper surface 126 and a lower surface 127 , and in this embodiment, the upper surface and the lower surface 126 , 127 extend from the connecting end 121 to the free end 122 . In a specific embodiment, the hub 100 is installed on a stator (not shown) of a fan, and the stator generates electromagnetic force to drive the hub 100 to run after being energized, and an airflow 200 is sucked into the hub 100 from the axial direction of the hub 100 (Each airflow channel 130 is all used to guide airflow 200, and the first figure only shows part of airflow 200), can guide the airflow acceleration to this forward inclination section 125 position at the position of backward inclination section 123 of this plurality of blades 120 The wind pressure is increased, and finally the airflow 200 flows out from the airflow channel 130 to the side of the hub 100 .

With this design of the present invention, due to the arrangement of the plate body 110, the airflow 200 will not pass through the backward inclined section 123 of the plurality of blades 120 and hit the fan base or frame downward, and the airflow 200 will not flow from the fan base or The bouncing and running of the frame causes unnecessary vibration or shaking of the plurality of blades 120 and negatively affects the noise of the fan. Compared with the existing centrifugal fan, since the backward inclined section 123 of the plurality of blades 120 is adjacent to the connecting end 121, the wind pressure can be increased in the backward inclined section 123, while the forward inclined section 125 has a large radius and a large number of blades The hub 100 can provide a relatively large air volume, and the fan wheel structure of the present invention can combine the advantages of the forward-inclined blades and the backward-inclined blades.

Please refer to Fig. 2, which is a three-dimensional schematic diagram of the second embodiment of the fan wheel structure of the present invention, and supplemented by referring to Fig. 1, as shown in the figure, part of the structure and function of this embodiment are the same as those of the above-mentioned first embodiment, so here Will not go into details, but the difference between this embodiment and the above-mentioned first embodiment is that the hub 100 also has a ring body 140, the ring body 140 has an upper end surface 141 and a lower end surface 142, the ring body 100 is connected to The plurality of vanes 120 and the upper surface 141 of the ring body 100 are coplanar with the upper surface 126 of the plurality of vanes 120 .

In this embodiment, the ring body 140 is connected to the plurality of blades 120 at the position of the middle section 124 of the plurality of blades 120 . With the arrangement of the ring body 140 , it can help the plurality of blades 120 maintain stability when the fan is running, reduce vibration and reduce the noise generated when the fan is running.

Please refer to Fig. 3, which is a three-dimensional schematic diagram of the third embodiment of the fan wheel structure of the present invention, and supplemented by referring to Fig. 2, as shown in the figure, part of the structure and function of this embodiment are the same as the above-mentioned second embodiment, so here Will not go into details, but the difference between this embodiment and the above-mentioned second embodiment is that the ring body 140 is connected with the plurality of blades 120 at the position of the forward slope section 125 of the plurality of blades 120, and a part of the ring body 140 The outer diameter surface 143 is coplanar with the free ends 122 of the plurality of blades 120 . With the arrangement of the ring body 140 , the interference between the free ends 122 of the plurality of blades 120 and the inner wall of the fan frame is reduced, thereby reducing the noise generated when the fan is running.

The above description is only illustrative of the present invention, rather than restrictive. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims, but All will fall within the protection scope of the present invention.

Claims (5)

1. a kind of fan wheel structure, it is characterized in that comprising：

There is one wheel hub a plate body and plural blade, the plate body to be located on the hub periphery edge and with a upper side and once Side, the plural number blade ring are set to the upper side of the plate body, which has a connecting pin and a free end, the connecting pin Connect the outer peripheral edge of the wheel hub, each blade has a hypsokinesis section, an interlude and one leans forward section, the adjacent connection of the hypsokinesis section The upper side of the plate body is held and is connected to, the adjacent free end of the section that leans forward, the interlude connects the hypsokinesis section and the section that leans forward, Every two hypsokinesis section and the upper side of the plate body form a gas channel.

2. fan wheel structure according to claim 1, it is characterised in that：Each blade has a upper surface and a lower surface, The upper surface, lower surface extend to the free end from the connecting pin.

3. fan wheel structure according to claim 2, it is characterised in that：Also there is the wheel hub ring body, the ring body to have one Upper surface and a lower face, the ring body are connected to the plural number blade, and the upper surface of the upper surface of the ring body and the plural number blade It is coplanar.

4. fan wheel structure according to claim 3, it is characterised in that：The ring body among this at fragment position with the plural number leaf Piece connects.

5. fan wheel structure according to claim 3, it is characterised in that：The ring body at the fragment position that leans forward with the plural number leaf Piece connects, and the free end of an external diameter surface and the plural number blade for the ring body is coplanar.