CN108612671B - Fan wheel structure - Google Patents

Abstract

The present invention provides a fan wheel structure, including a hub, a plate body and a plurality of blades, the plate body is arranged on the outer periphery of the hub and has an upper side surface and a lower side surface, the plurality of blades are arranged on the upper side surface of the plate body, 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 surface 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 and the upper side surface of the plate body form an air flow channel.

Description

Fan wheel structure

technical field

The present invention relates to a fan wheel structure, in particular to a fan wheel structure which can reduce vibration and noise when the fan is running.

Background technique

In the field of heat dissipation, the existing centrifugal fan takes in the air from the axial direction and then discharges the air from the side to dissipate heat. Existing centrifugal fans can be classified into backward-inclined and forward-inclined types according to the size of the included angle between the blade angle of the fan wheel and the tangent to the outlet direction. The forward-inclined blade is inclined towards the rotation direction, the angle between the blade angle and the tangent of the outlet direction is greater than 90 degrees, the radial direction of the blade is shorter, the air volume is large, the wind speed is fast, and the noise is also large. The inclined direction of the backward-inclined blade is opposite to the rotation direction, the angle between the blade angle and the tangent to 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 condition that the fan speed and the outer diameter of the blades are the same, the forward-inclined blades can output a larger air volume and provide a better heat dissipation effect, but also increase the load of the motor. On the other hand, at the same rotational speed, the backward-sloping blade has a smaller air volume and the heat dissipation effect is worse than that of the forward-leaning blade. The backward-sloping blade needs to increase the rotational speed to achieve the same air volume and heat dissipation effect as the forward-leaning blade. Therefore, the noise generated by the backward inclined blades is relatively 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 the air exits from the side, and the other part of the airflow passes through the blades and hits the fan base or frame and then bounces back to the hub. and near the blades, which will not only cause insufficient lateral air flow, but also have a negative impact on fan noise and vibration due to the rebounding airflow.

Therefore, how to reduce the vibration and shaking of the blades during operation while increasing the fan air volume and wind pressure, and how to reduce the vibration and noise generated by the airflow passing through the blades and hitting the fan base or frame, is a problem for researchers in this field. direction of effort.

SUMMARY OF THE INVENTION

One objective 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 rambling of the fan base or frame after the airflow passes through the blades.

In order to achieve the above-mentioned purpose, the present invention provides a kind of fan wheel structure, it is characterized in that comprising:

A hub with a plate body and a plurality of blades, the plate body is arranged on the outer periphery of the hub and has an upper side and a lower side, the plurality of blades are arranged on the upper side of the plate body, and the plurality of blades has a connecting end and a free end, the connection 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 connection end and connected to the upper side of the plate body, The forward inclined section is adjacent to the free end, the middle section is connected to 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 airflow channel.

The fan wheel structure, wherein: each blade has an upper surface and a lower surface, and the upper surface and the 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 with the upper end surface of the plurality of blades. The surfaces are coplanar.

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

The fan wheel structure, wherein: the ring body is connected with the plurality of blades at the position of the forward inclined 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 the fan air volume and outlet air pressure are increased, and the vibration and noise generated by the airflow passing through the blades and hitting the fan base or frame body can be reduced. .

Description of drawings

Fig. 1 is the perspective schematic diagram of the first embodiment of the fan wheel structure of the present invention;

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

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

Reference numeral description: 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; ring body 140; upper end surface 141; lower end surface 142;

Detailed ways

The above objects of the present invention and their structural and functional characteristics will be described with reference to the preferred embodiments of the accompanying drawings.

Please refer to FIG. 1 , which is a three-dimensional schematic diagram 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 refers to 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 arranged around the outer periphery of the wheel hub 100 , and has an upper side surface 111 and a lower side surface 112 respectively disposed on the upper and lower sides of the plate body 110 . The plurality of blades 120 are disposed on the upper side surface 111 of the plate body 110 in an annular radial manner. The plurality of blades 120 have a connecting end 121 and a free end 122 respectively disposed at both 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 , the middle section 124 is connected to the backward inclined section 123 and the forward inclined section 125 , and every two backward inclined sections 123 are connected to the upper surface of the plate body 110 . The side surface 111 forms an airflow channel 130 .

Moreover, each blade 120 has an upper surface 126 and a lower surface 127 , and in this embodiment, the upper and lower surfaces 126 and 127 extend from the connecting end 121 to the free end 122 . In a specific embodiment, the wheel hub 100 is installed on a stator (not shown) of a fan. After the stator is energized, an electromagnetic force is generated to drive the wheel hub 100 to run, and an air flow 200 is sucked into the wheel hub 100 from the axial direction of the wheel hub 100 . (Each airflow channel 130 is used to guide the airflow 200, the first figure only shows a part of the airflow 200), the airflow acceleration can be guided to the position of the forwardly inclined segment 125 at the position of the backward inclined section 123 of the plurality of blades 120 The wind pressure is increased, and finally the airflow 200 is discharged from the airflow channel 130 to the side of the wheel hub 100 .

Due to the design of the present invention, due to the arrangement of the plate body 110, the airflow 200 will not pass through the backward inclined sections 123 of the plurality of blades 120 and hit the fan base or the frame downward, and the airflow 200 will not pass from the fan base or the fan base. The bouncing of the frame body causes unnecessary vibration or shaking of the plurality of blades 120 , which 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, and the forward inclined section 125 has a large radius and a large number of blades. The hub 100 can provide a larger air volume, and the fan wheel structure of the present invention can combine the advantages of forward-inclined blades and 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. Referring to FIG. 1 , as shown in the figure, part of the structure and function of this embodiment are the same as the above-mentioned first embodiment. The details will not be repeated, but the difference between this embodiment and the above-mentioned first embodiment is that the hub 100 further has a ring body 140, and the ring body 140 has an upper end surface 141 and a lower end surface 142. The ring body 100 is connected to the The plurality of blades 120 and the upper end surface 141 of the ring body 100 are coplanar with the upper surface 126 of the plurality of blades 120 .

In this embodiment, the ring body 140 is connected with the plurality of blades 120 at the position of the middle section 124 of the plurality of blades 120 . By virtue of the arrangement of the ring body 140 , the plurality of blades 120 can be more helpful to maintain the stability of the fan when the fan is running, reduce vibration and thus 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 also refer to FIG. 2 . As shown in the figure, part of the structure and function of this embodiment are the same as those of the second embodiment, so here The details will not be repeated, but the difference between this embodiment and the above-mentioned second embodiment is that the ring body 140 is connected to the plurality of blades 120 at the positions of the forward inclined sections 125 of the plurality of blades 120 , and a part of the ring body 140 is connected to the plurality of blades 120 . The outer diameter surface 143 is coplanar with the free ends 122 of the plurality of vanes 120 . The arrangement of the ring body 140 reduces the interference between the free ends 122 of the plurality of blades 120 and the inner wall of the fan frame, thereby reducing the noise generated when the fan is running.

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

Claims (5)

1. A fan wheel structure is characterized by comprising:

a wheel hub, a plate body and plural blade have, this plate body ring is located this wheel hub outer peripheral edge and has an up side and a downside, the up side of this plate body is located to this plural blade ring, this plural blade has a link and a free end, this hub's outer peripheral edge is connected to this link, each blade has a hypsokinesis section, an interlude and one section that leans forward, this link that this hypsokinesis section is adjacent is connected in the up side of this plate body, this free end that this section that leans forward is adjacent, this hypsokinesis section and this section that leans forward are connected to this interlude, every two hypsokinesis sections and the up side of this plate body form an air current channel.

2. The impeller structure of claim 1, wherein: each blade has an upper surface and a lower surface extending from the attachment end to the free end.

3. The impeller structure of claim 2, wherein: the hub is further provided with a ring body, the ring body is provided with an upper end surface and a lower end surface, the ring body is connected with the plurality of blades, and the upper end surface of the ring body is coplanar with the upper surfaces of the plurality of blades.

4. A fan wheel structure according to claim 3, wherein: the ring body is connected with the plurality of blades at the middle section position.

5. A fan wheel structure according to claim 3, wherein: the ring body is connected with the plurality of blades at the position of the front inclined section, and an outer diameter surface of the ring body is coplanar with the free ends of the plurality of blades.

Images