CN108612671B

CN108612671B - Fan wheel structure

Info

Publication number: CN108612671B
Application number: CN201810503528.9A
Authority: CN
Inventors: 王得中; 徐亮华
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2018-05-23
Filing date: 2018-05-23
Publication date: 2020-11-20
Anticipated expiration: 2038-05-23
Also published as: CN108612671A

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 present invention relates to a fan wheel structure, and more particularly, to a fan wheel structure capable of reducing vibration and noise during operation of a fan.

Background

In the field of heat dissipation, a conventional centrifugal fan receives air from an axial direction and then discharges the air from a side direction, thereby dissipating heat. The existing centrifugal fan can be divided into a backward tilting type and a forward tilting type according to the included angle between the blade angle of the fan wheel and the tangent of the outlet direction. The forward-inclined blades incline towards the rotating direction, the included angle between the angle of each blade and the tangent of the outlet direction is larger than 90 degrees, the blades are radially shorter, the air quantity is large, the air speed is high, and the noise is also larger. The inclination direction of the backward inclined blade is opposite to the rotation direction, the included angle between the angle of the blade and the tangent line of the outlet direction is smaller than 90 degrees, the blade is longer in the radial direction, the outlet speed is lower, and larger wind pressure can be generated.

However, under the condition of the same fan rotation speed and the same blade outer diameter, the forward-inclined blades can output larger air volume, provide better heat dissipation effect, but also increase the load of the motor. The backward inclined blade has smaller air volume and poorer heat dissipation effect than the forward inclined blade at the same rotating speed, the backward inclined blade can achieve the same air volume and heat dissipation effect as the forward inclined blade under the condition of improving the rotating speed, and the noise generated by the backward inclined blade is relatively increased because the rotating speed is improved.

In addition, after the airflow of the existing centrifugal fan enters from the axial direction, one part of the airflow is driven by the fan blades to be discharged from the lateral direction, and the other part of the airflow passes through the blades and collides with the fan base or the frame body and then rebounds to the wheel hub and the position near the blades, so that not only is the lateral air discharge amount insufficient, but also the rebounded airflow flees randomly and can generate negative effects on the noise and vibration of the fan.

Therefore, it is an effort of researchers in the field to reduce the vibration and the shake of the blades during operation and reduce the vibration and the noise generated by the air flow passing through the blades and impacting the fan base or the frame under the condition of increasing the air volume and the air pressure of the fan.

Disclosure of Invention

The invention aims to increase the air quantity and the air pressure of the fan and reduce the vibration and the shaking of the blades during operation.

Another object of the present invention is to reduce the vibration and noise caused by the air flow after passing through the blades and impacting the fan base or frame.

To achieve the above object, the present invention provides a fan wheel structure, which comprises:

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.

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

The impeller structure, 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.

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

The impeller structure, 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.

By means of the design, the vibration and the shaking of the blades during operation can be reduced under the condition of increasing the air volume and the air outlet pressure of the fan, and the vibration and the noise generated by the air flow which passes through the blades and collides the fan base or the frame body and then flees are reduced.

Drawings

Fig. 1 is a perspective view of a first embodiment of a fan wheel structure of the present invention;

FIG. 2 is a perspective view of a second embodiment of the impeller structure of the present invention;

fig. 3 is a perspective view of a third embodiment of the impeller structure of the present invention.

Description of reference numerals: the impeller structure 10; a hub 100; a plate body 110; an upper side 111; a lower side 112; a blade 120; a connection end 121; a free end 122; a rearward tilting section 123; an intermediate section 124; a forward-inclined section 125; an upper surface 126; a lower surface 127; an airflow passage 130; a ring body 140; an upper end face 141; a lower end surface 142; an outer diameter surface 143; gas flow 200.

Detailed Description

The above objects, together with the structural and functional features thereof, are accomplished by the preferred embodiments according to the accompanying drawings.

Referring to fig. 1, which is a perspective view of a first embodiment of the impeller structure of the present invention, as shown, the impeller structure 10 of the present invention includes a hub 100, and an arrow F indicates a rotation direction of the hub 100.

The hub 100 has a plate 110 and a plurality of blades 120. The plate 110 is disposed around the outer periphery of the hub 100, and has an upper side 111 and a lower side 112 disposed on the upper and lower sides of the plate 110. The plurality of blades 120 are disposed on the upper side 111 of the plate 110 in an annular radiation manner, and the plurality of blades 120 have a connection 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 upper side 111 of the plate 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 each two backward inclined sections 123 and the upper side 111 of the plate 110 form an air flow channel 130.

Each blade 120 has an upper surface 126 and a lower surface 127, and in the present embodiment, the upper and

lower surfaces

126, 127 extend from the connecting end 121 to the free end 122. In one embodiment, the hub 100 is mounted on a stator (not shown) of a fan, the stator generates electromagnetic force to drive the hub 100 to rotate when being powered on, a airflow 200 is sucked into the hub 100 from the axial direction of the hub 100 (each airflow channel 130 is used for guiding the airflow 200, the first drawing only shows a part of the airflow 200), the airflow acceleration can be guided at the backward inclined section 123 of the plurality of blades 120 to the forward inclined section 125 to increase the wind pressure, and finally the airflow 200 is blown out from the airflow channel 130 to the side of the hub 100.

By means of the design of the present invention, due to the arrangement of the plate 110, the airflow 200 does not pass through the backward inclined section 123 of the plurality of blades 120 and strike the fan base or the frame downward, and the airflow 200 does not bounce back from the fan base or the frame to cause the plurality of blades 120 to generate unnecessary vibration or shake, which may adversely affect the fan noise. Compared with the conventional centrifugal fan, the backward inclined section 123 of the plurality of blades 120 is adjacent to the connecting end 121, the backward inclined section 123 can increase the wind pressure, and the forward inclined section 125 has a large radius and a large number of blades to provide a large wind volume to the hub 100.

Please refer to fig. 2, which is a schematic perspective view of a second embodiment of a fan wheel structure of the present invention, and with reference to fig. 1, as shown in the figure, part of the structure and functions of the present embodiment are the same as those of the first embodiment, and therefore will not be described herein, but the present embodiment is different from the first embodiment in that the hub 100 further includes 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 blades 120, and the upper end surface 141 of the ring body 100 is coplanar with the upper surfaces 126 of the plurality of blades 120.

In the present embodiment, the ring 140 is connected to the plurality of blades 120 at the middle section 124 of the plurality of blades 120. By means of the arrangement of the ring body 140, the plurality of blades 120 can be more helpful to maintain the stability of the fan during operation, and reduce the noise generated during the operation of the fan due to the vibration.

Please refer to fig. 3, which is a schematic perspective view of a third embodiment of a fan wheel structure of the present invention, and with reference to fig. 2, as shown in the figure, part of the structure and functions of the present embodiment are the same as those of the second embodiment, and therefore will not be described herein again, but the present embodiment is different from the second embodiment in that the ring body 140 is connected to the plurality of blades 120 at the position of the front inclined section 125 of the plurality of blades 120, and an outer diameter surface 143 of the ring body 140 is coplanar with the free ends 122 of the plurality of blades 120. By means of the arrangement of the ring body 140, the interference between the free ends 122 of the plurality of blades 120 and the inner wall surface of the fan frame is reduced, thereby reducing the noise generated during the operation of the fan.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A fan wheel structure is characterized by comprising:

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.