CN107355420B - Heat dissipation fan structure with cylindrical fan blades - Google Patents

Abstract

A heat dissipation fan structure with cylindrical fan blades includes a rotating body and a plurality of rotating cylinders arranged on the outer surface of the rotating body. The rotating body has a first driving device to drive the rotating body to rotate and a first conductive part and a second conductive part. The plurality of rotating cylinders rotate with the rotating body and each has a second driving device electrically connected to the first conductive part and drives the rotating cylinder to rotate itself.

Description

Cooling fan structure with cylindrical fan blades

【Technical field】

The invention relates to the field of fans, in particular to a cooling fan structure with cylindrical fan blades.

【Background technique】

Generally, the fan blades of the fan have a designed airflow angle after rotation, so that the air flow on the upper and lower surfaces of the airfoil causes the difference in speed due to the difference in the surface distance and length. Because the airflow on the surface of the upper wing is faster, the corresponding surrounding gas pressure is lower, while the airflow on the lower surface of the wing is slower, so the corresponding surrounding gas pressure is higher. The pressure difference of different sizes makes the lower wing surface The pressure on the upper airfoil creates lift. The reaction force of the lift forms the thrust of the airflow, and the airflow turns through the airfoil to produce the effect of work, thereby showing the characteristics of the fan.

However, the traditional moving and stationary blade structure, or the single moving blade with the rib structure outer frame, due to the interaction of the fan blade and wing structure, the noise is generally larger in broadband noise and narrowband noise. Furthermore, with the traditional fan structure, the airflow flows out in a divergent manner due to the influence of the blade wing shape, so the degree of heat dissipation for the heating element directly behind the fan in the system is insufficient.

Therefore, how to solve the above-mentioned problems and deficiencies is the direction that the inventor of this case and the relevant manufacturers engaged in this industry are eager to research and improve.

[Content of the invention]

The purpose of the present invention is to provide a conductive part capable of providing power to the second stator group of each rotating cylinder disposed on the outer surface of the rotating body to drive the rotating cylinder to rotate itself when the rotating body of the cooling fan rotates.

Another object of the present invention is to provide a plurality of cylindrical fan blades arranged on the axial surface of the hub. The cylindrical fan blades not only rotate with the hub, but also rotate by themselves to make the airflow radiate toward the radial direction of the hub. flow.

Another object of the present invention is to provide a plurality of cylindrical fan blades disposed on the radial surface of the hub. The cylindrical fan blades not only rotate with the hub, but also rotate by themselves to make the air flow toward the axial direction of the hub. .

Another object of the present invention is to provide a cooling fan structure with cylindrical fan blades. The air flow derived from the rotating cylinder does not pass through the known changing and interaction of the wing-shaped fan blades, and the noise level is relatively low under the same heat dissipation. Small.

Another object of the present invention is to provide a cooling fan structure with a cylindrical fan blade. The airflow derived from the rotating cylinder is relatively convergent and has a wide range, so the heating elements in the system can be directly guided by the airflow to the heat source or Direct circulation takes away the heat source.

Another object of the present invention is to provide a cooling fan structure with cylindrical fan blades, which applies the Magnus effect to the cooling fan to generate corresponding airflow.

Another object of the present invention is to provide that each rotating cylinder rotates at different rotational speeds, thereby generating thrusts of different magnitudes, so that the combined thrust of the rotating cylinder is offset to one side, and further applied to the antipyretic where the heat source is not directly behind the cooling fan .

Another object of the present invention is to provide the radii of the rotating cylinders with different sizes, thereby generating different thrusts so that the combined thrust of the rotating cylinders is biased to one side, so as to be used in antipyretic applications where the heat source is not directly behind the cooling fan.

In order to achieve the above object, the present invention provides a cooling fan structure with a cylindrical fan blade, comprising: a rotating body, including a first rotor group corresponding to a first stator group to drive the first rotor group of the rotating body to rotate, A first conductive portion is arranged in the first rotor group, a second conductive portion is arranged in the first stator group, and contacts the first conductive portion correspondingly; a plurality of rotating cylinders are arranged in the first rotor group An outer surface rotates with the rotating body, and includes a second rotor group and a second stator group respectively. The second rotor group corresponds to the second stator group to drive the rotating cylinder to rotate itself. The second stator group The first conductive portion is electrically connected.

In one embodiment, the first rotor set includes a hub with an outer surface and a first inner space and a second inner space ring arranged outside the first inner space, the first inner space is provided with a hub shaft connection The wheel hub is provided with a first shell portion and a first magnetic element, the first magnetic element is arranged on an inner side of the first shell portion, and the second inner space is provided with the first conductive portion.

In one embodiment, an annular partition wall is disposed between the first inner space and the second inner space.

In one embodiment, the first conductive portion includes a first cantilever rod and a second cantilever rod opposite, one end of the first cantilever rod is connected to the hub, the other end is provided with a first support shaft, and a first roller is movable. One end of the second cantilever rod is connected to the hub, the other end is provided with a second support shaft, and a second roller movably sleeves the second support shaft and is opposite to the first roller.

In one embodiment, the first cantilever rod and the second cantilever rod are respectively connected to a first guide wire and a second guide wire, and the first guide wire and the second guide wire extend through the hub to the Outside of the hub.

In one embodiment, the first stator assembly includes a first base with a central shaft barrel, and at least one bearing is arranged in the central shaft barrel to support the hub shaft, a first stator winding assembly An outer side of the central shaft barrel corresponds to the first magnetic element, and the second conductive portion is arranged on the first base and at the outer side of the stator winding group.

In one embodiment, the second conductive portion includes a first protruding ring body and a second protruding ring body which are concentric circles, and the first protruding ring body is connected to a positive electrode and a negative electrode of an external power supply One of them, the second protruding ring body is connected to the other one of the positive electrode and the negative electrode, wherein the second protruding ring body is located outside the first protruding ring body, and the first protruding ring body and the first protruding ring body are The two protruding ring bodies respectively have a fixed end connected to the base and a free end contacted with the first conductive portion.

In one embodiment, the outer surface of the hub has an axial surface and a radial surface, and the rotating cylinder is disposed on the axial surface or the radial surface.

In one embodiment, the rotating cylinders are arranged symmetrically or asymmetrically.

In one embodiment, the second rotor group includes a cylindrical body with a cylindrical inner chamber at one end, and the cylindrical inner chamber is provided with a cylindrical shaft connecting the cylindrical body and accommodating a second shell and a second annular magnetic element. , the second annular magnetic element is arranged on an inner side of the second shell.

In one embodiment, the second stator group includes a second base with a central shaft barrel on one side corresponding to the second rotor group, and at least one bearing is arranged in the central shaft barrel to support the cylindrical shaft, a The second stator winding set is sleeved on an outer side of the central shaft barrel and corresponds to the second annular magnetic element.

In one embodiment, a side of the second base opposite to the second rotor set is provided with a fixing portion connected to an outer surface of the first rotor set.

In one embodiment, an outer peripheral surface of the cylindrical body is provided with at least one ridge.

In one embodiment, the protruding strips are helical, wing-like, waterwheel-like, or segmented radially distributed.

In one embodiment, the radii of the rotating cylinders are the same or different.

In one embodiment, the rotational speeds of the rotating cylinders are the same or different.

【Description of drawings】

The following drawings are intended to facilitate understanding of the present invention, and are described in detail herein and form a part of specific embodiments. The specific embodiments of the present invention are explained in detail through the specific embodiments herein and the corresponding drawings are referred to, and the working principle of the invention is described.

Fig. 1A is the three-dimensional exploded schematic diagram of the present invention;

1B is a schematic exploded perspective view of the present invention;

FIG. 1C is a schematic cross-sectional view of the combination of the present invention;

2A is a perspective exploded schematic view of a rotating cylinder of the present invention;

2B is a schematic cross-sectional view of the combination of the rotating cylinder of the present invention;

FIG. 3A is a schematic view of the top view of the present invention;

3B is a schematic diagram of the action of the self-rotation of the rotating cylinder of the present invention;

4A is a schematic three-dimensional action diagram of another implementation of the present invention;

4B is a schematic view of the front view of another implementation of the present invention;

5A and 5B are schematic diagrams of other alternative implementations of the present invention;

6A, 6B, and 6C are schematic views of various implementations of the rotating cylinder of the present invention;

7A is a schematic diagram of the symmetrical arrangement of the rotating cylinder on the axial surface of the hub according to the present invention;

7B is a schematic diagram of the asymmetric arrangement of the rotating cylinder on the axial surface of the hub according to the present invention;

8A is a schematic diagram of the symmetrical arrangement of the rotating cylinder on the radial surface of the hub according to the present invention;

8B is a schematic diagram of the asymmetric arrangement of the rotating cylinder on the radial surface of the hub according to the present invention.

Description of main symbols:

cooling fan 10

Rotary body 20

The first rotor group 21

Wheel hub 210

Outer surface 211

Axial surface 2111

Radial Surface 2112

first inner space 212

The second inner space 213

Wheel hub shaft 214

first magnetic element 216

The first stator winding group 215

Silicon steel sheet group 2151

Insulation frame set 2152

Winding Set 2153

first circuit board 2154

annular partition wall 217

first shell portion 218

The first stator group 22

first base 221

Center shaft barrel 222

Bearing 223

The first conductive part 24

The first cantilever rod 241a

The first support shaft 242a

The first roller 243a

The first guide wire 244a

The second cantilever rod 241b

The second support shaft 242b

The second roller 243b

second guide wire 244b

The second conductive portion 25

The first protruding ring body 251

Fixed end 2511

Free end 2512

The second protruding ring body 252

Fixed end 2521

Free end 2522

Positive lead 253

Negative lead 254

Rotating cylinders 30, 30a, 30b, 30c

The second rotor group 31

Cylindrical body 311

Ribs 3111, 3111a, 3111b, 3111c

Cylindrical Content Chamber 312

Cylindrical shaft 313

second shell portion 314

second magnetic element 315

Second stator group 32

The second base 321

Center shaft barrel 322

Bearing 323

Second stator winding set 325

Silicon steel sheet group 3251

Insulation frame set 3252

Winding Set 3253

Second circuit board 3254

Fixed part 326

Buckle 3261

Center line c1, c2 Linear distance L11~L13, L21~L23

Included angles α, β, γ

Axial lines c21, c22, c23.

【Detailed ways】

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

FIG. 1A is a schematic exploded perspective view of the present invention; FIG. 1B is a schematic exploded perspective view of another perspective view of the present invention; and FIG. 1C is a schematic diagram of a combined cross-sectional view of the present invention. As shown in the figure, a cooling fan 10 includes a rotating body 20 and a plurality of rotating cylindrical bodies 30 .

The rotating body 20 includes a first rotor group 21 and a first stator group 22 . The first rotor set 21 corresponds to the first stator set 22 , wherein the first rotor set 21 includes a hub 210 having an outer surface 211 and a first inner space 212 and a second inner space 213 . The outer surface 211 has an axial surface 2111 and a radial surface 2112 extending from the outer periphery of the axial surface 2111 , the radial surface 2112 is relatively perpendicular to the axial surface 2111 , and the axial surface 2111 is the top of the hub 210 The radial surface 2112 is the side surface of the hub 210 .

The first inner space 212 and the second inner space 213 are arranged in concentric circles, and the second inner space 213 is annularly disposed outside the first inner space 212 . An annular partition wall 217 is disposed between the first inner space 212 and the second inner space 213 . The first inner space 212 is provided with a hub shaft 214 connected to the hub 21 and accommodates a first shell 218 (eg, an iron shell) and a first magnetic element 216 (eg, a magnet), and the first magnetic element 216 surrounds on an inner side of the first shell portion 218 . The second inner space 213 is provided with a first conductive portion 24 .

The first stator group 22 includes a first base 221 with a central shaft barrel 222 . At least one bearing 223 is arranged in the central shaft barrel 222 to support the hub shaft 214 , and the hub shaft 214 is inserted into the hub shaft 214 . The bearing 223 disposed in the central shaft barrel 222 is then buckled by a buckle, so that the first rotor group 21 is disposed on the first stator group 22 . A first stator winding set 215 is sleeved on an outer side of the central shaft barrel 222 and corresponds to the first magnetic element 216 of the first inner space 212. When the first stator winding set 215 is energized, the first magnetic The element 216 generates a magnetic induction effect, thereby driving the first rotor group 21 of the rotating body 20 to rotate. The first stator winding set 215 includes a stacked silicon steel sheet set 2151 and an insulating frame set 2152 respectively disposed on the upper and lower sides of the silicon steel sheet set 2151 and a winding set 2153 wound on the insulating frame set 2152 and a The first circuit board 2154 is disposed under the insulating frame set 2152 and electrically connected to the winding set 2153. The first circuit board 2154 is connected to an external power supply (not shown) to provide the operation of the first stator winding set 215. power supply. A second conductive portion 25 is disposed on the first base 221 and is located on the outer side of the stator winding group 215 and is axially or vertically in contact with the first conductive portion of the second inner space 213 of the first rotor group 21 . twenty four. The first conductive portion 24 and the second conductive portion 25 are made of conductive material such as metal, and the hub 210 and the first base 221 are made of insulating material such as plastic.

The first conductive portion 24 includes a first cantilever rod 241a and a second cantilever rod 241b. One end of the first cantilever rod 241a is connected to an inner side of the hub 210, and the other end is provided with a first support shaft 242a, a The first roller 243a is movably sleeved on the first support shaft 242a; one end of the second cantilever rod 241b is connected to an inner side of the hub 210, and the other end is provided with a second support shaft 242b, and a second roller 243b is movably sleeved The second support shaft 242b is opposite to the first roller 243a. The first cantilever rod 241a and the second cantilever rod 241b are respectively connected to a first guide wire 244a and a second guide wire 244b. Furthermore, two through holes 21111 and 21112 are formed on the top 2111 of the hub 210 to penetrate through the hub 210 , and the first guide wire 244 a and the second guide wire 244 b extend to the outside of the hub 210 through the through holes 21111 and 21112 . The rotating cylinder 30 is attached.

The second conductive portion 25 includes a first protruding ring body 251 and a second protruding ring body 252 which are concentric and are connected to an external power source (not shown) via a positive lead 253 and a negative lead 254 . Positive power supply and negative power supply, but not limited to this, and vice versa. The second protruding ring body 252 is located outside the first protruding ring body 251 , and the first protruding ring body 251 and the second protruding ring body 252 respectively have a fixed end 2511 and 2521 connected to the 221 base The seat, and a free end 2512 , 2522 protrude upward and contact the first roller 243 a and the second roller 243 b of the first conductive portion 24 , respectively.

In detail, when the hub 210 rotates, the first conductive portion 24 is driven to rotate, the first roller 243a and the second roller 243b can be at the free ends of the first protruding ring body 251 and the second protruding ring body 252 2512, 2522 roll. The positive power is transmitted to the first roller 243a through the first protruding ring body 251 and then to the rotating cylinder 30 through the first support shaft 242a and the first cantilever rod 241a and then through the first guide wire 244a. The negative power is transmitted to the second roller 243b through the second protruding ring body 252 and then to the rotating cylinder 30 through the second support shaft 242b and the second cantilever rod 241b and then through the second guide wire 244b.

The rotating cylinder 30 is disposed on the outer surface 211 of the first rotor group 21. In this preferred embodiment, the rotating cylinder 30 is vertically disposed on the axial surface 2111 of the hub 210, and a center line c2 of the rotating cylinder 30 is parallel to A centerline c1 of the hub 210 . The rotating cylinder 30 is driven by the first rotor group 21 of the rotating body 20 to rotate around the center line c1 of the hub 210

2A is a schematic exploded perspective view of the rotating cylinder of the present invention; FIG. 2B is a schematic cross-sectional view of the assembly of the rotating cylinder of the present invention. 2A and 2B, each rotating cylinder 30 includes a second rotor set 31 and a second stator set 32, the second rotor set 31 corresponds to the second stator set 32 to drive the rotating cylinder 30 to self-rotate.

The second rotor set 31 includes a cylindrical body 311 with a cylindrical inner chamber 312 at one end, and a cylindrical shaft 313 is arranged in the cylindrical inner chamber 312 to connect the cylindrical body 311 and accommodate a second shell 314 and a second Magnetic element 315 , the second magnetic element 315 is disposed on an inner side of the second shell 314 . An outer peripheral surface of the cylindrical body 311 is provided with at least one protruding strip 3111 . In this embodiment, the protruding strip 3111 is helical and spirally wound on the outer peripheral surface of the cylindrical body 3111 .

The second stator set 32 includes a second base 321 protruding with a central shaft barrel 322 , and at least one bearing 323 is provided in the central shaft barrel 322 for supporting the cylindrical shaft 313 . The cylindrical shaft 313 is inserted into the bearing 323 of the central shaft barrel 322 and then fastened by a buckle, so that the second rotor group 31 is disposed on the second stator group 32 . A second stator winding set 325 is sleeved on an outer side of the central shaft 322 and corresponds to the second magnetic element 315 of the cylindrical inner chamber 312 . When the second stator winding 325 is energized, the second magnetic element 315 is followed A magnetic induction effect is generated, thereby driving the second rotor group 31 of the rotating cylinder 30 to rotate.

The second stator winding set 325 includes a stacked silicon steel sheet set 3251 and an insulating frame set 3252 respectively disposed on the top and bottom of the silicon steel sheet set 3251 and a winding set 3253 wound on the insulating frame set 3252 and a first The two circuit boards 3254 are disposed under the insulating frame group 3252 and electrically connected to the winding group 3253 .

Referring back to FIG. 1C, the aforementioned first guide wire 244a and second guide wire 244b are connected to the second circuit board 3254 of the second stator winding group 325 of the rotating cylinder 30, and then connect the positive power supply and the negative power supply. Conducted to the second circuit board 3254 to provide power for the operation of the second stator windings 325 .

Furthermore, as shown in FIGS. 2A and 2B , the second base 321 is provided with a fixing portion 326 connected to the predetermined position of the axial surface 2111 of the hub 210 of the first rotor set 21 , and the end of the fixing portion 326 has a The hook 3261 is fastened to the hub 210 . In some alternative implementations, the fixing portion 326 can be fixed with the hub 210 by means of riveting, bonding or locking.

Please continue to refer to FIGS. 3A and 3B , when the hub 210 of the first rotor group 21 rotates, the rotating cylinder 30 rotates around the center line c1 of the hub 210 . And the second stator group 32 of each rotating cylinder 30 and the second rotor group 31 act to drive the cylindrical body 311 of the second rotor group 31 to rotate around the center line c2, so that there is a lateral airflow on one side of the rotating cylinder 30. The flow to the rotating cylinder 30 (as shown in FIG. 3B, from the right side to the left side of the figure) produces a Magnus type effect, that is, the sum of the velocities of A above the rotating cylinder 30 is the phase The additive effect (the lateral velocity F1 and the tangential velocity F2 are in the same direction) becomes faster, and the pressure is smaller (according to Bernoulli's law), and the sum of the velocities of B below the rotating cylinder 30 is the subtractive effect (lateral The speed F1 and the tangential speed F2 are opposite) the slower the speed, the higher the pressure (according to Bernoulli's principle); under the last two pressure differences, the larger pressure pushes the smaller pressure, and the cross flow direction will be generated. Vertical lateral thrust Y. Under such action, the cooling fan 10 generates centrifugal airflow, that is, the airflow flows radially toward the radial direction of the cooling fan 10 .

4A and 4B , in another alternative implementation, the rotating cylinder 30 is radially disposed on the radial surface 2112 of the hub 210 of the rotating body 20 . When the hub 210 of the rotating body 20 rotates and the rotating cylinder 30 rotates itself, the sum of the speeds above the rotating cylinder 30 is a subtractive effect (the lateral speed F1 and the tangential speed F2 are opposite) and the speed becomes slower, and the pressure is higher than Large (according to Bernoulli's principle), the sum of the velocities below the rotating cylinder 30 is an additive effect (the lateral velocity F1 and the tangential velocity F2 are in the same direction) the faster the velocity, the smaller the pressure (according to Bernoulli's principle) Law Bernoulli's principle); under the last two pressure differences, the larger pressure pushes the smaller pressure, and a transverse thrust Y perpendicular to the direction of the cross flow will be generated. The cooling fan 10 generates an axial airflow, that is, the airflow flows toward the axial direction of the cooling fan 10 .

In an alternative implementation, the rotating cylinder 30 rotates at the same rotational speed. In another alternative implementation, each rotating cylinder 30 rotates at different rotational speeds, thereby generating thrusts of different magnitudes, and the rotational speed can be adjusted so that the combined thrust of the rotating cylinders 30 is offset to one side, and further applied when the heat source is not in the direction of the cooling fan 10 . Rear antipyretic.

Referring also to FIGS. 5A and 5B , the radii of the rotating cylinder 30 are represented by the same dimensions in the illustrations of the previously described implementations, but in some alternative implementations, are provided on the axial surface 211 of the hub 210 of the rotating body 20 The radius of each rotating cylinder 30 (as shown in FIG. 5A ) or the radial surface 2112 (as shown in FIG. 5B ) is of different size. For example, there are three rotating cylinders 30a, 30b, and 30c in the figure. The radius of the cylinder 30b is greater than the radius of the rotating cylinder 30c, whereby the rotating cylinders 30a, 30b, 30c generate output air volumes of different sizes, thereby generating thrusts of different sizes, and the size of the output air volume can be adjusted so that the rotating cylinder 30 The combined thrust of the radiator is on one side, and then applied to the antipyretic where the heat source is not directly behind the cooling fan 10

6A, 6B and 6C, although the previous implementations show that the protruding strips 3111 on the outer peripheral surface of the cylindrical body 311 (as shown in the previous figures) are helical, in other alternative implementations, the protruding strips 3111a It is wing-shaped (as shown in FIG. 6A ), or the protruding strips 3111b are waterwheel-shaped (as in FIG. 6B ), or the protruding strips 3111c are segmented and radially distributed (as in FIG. 6C ).

Please continue to refer to FIGS. 7A and 7B , the rotating cylinders 30 a , 30 b and 30 c vertically disposed on the axial surface 211 of the hub 210 are arranged symmetrically, as shown in FIG. 7A . The symmetrical arrangement means that the linear distances between the two rotating cylinders 30a, 30b, and 30c are equal. As shown in FIG. 7A, the linear distance L11 between the rotating cylinder 30a and the rotating cylinder 30c, the rotating cylinder 30b and the rotating cylinder The linear distance L12 between the cylinders 30c and the linear distance L13 between the rotating cylinder 30a and the rotating cylinder 30b are equal to the three linear distances L11-L13.

In another implementation, the rotating cylinders 30a, 30b, 30c vertically arranged on the axial surface 211 of the hub 210 are arranged asymmetrically, as shown in FIG. 7B . The asymmetric arrangement means that the linear distances between the two rotating cylinders 30a, 30b, and 30c are not equal. As shown in FIG. 7B, the three linear distances L21-L23 are not equal.

8A and 8B, the rotating cylinders 30a, 30b, 30c radially disposed on the radial surface 2112 of the hub 210 of the rotating body 20 are arranged symmetrically, as shown in FIG. 8A. The symmetrical arrangement means that the included angles α, β and γ of the two rotating cylinders 30a, 30b and 30c are the same. And as shown in FIG. 8A, the axial lines c21, c22, c23 of the rotating cylinders 30a, 30b, 30c extend to the center line c1 of the hub 210, and the angle γ between the rotating cylinder 30a and the rotating cylinder 30b is defined by Between the axial lines c21, c22; the angle α between the rotating cylinder 30b and the rotating cylinder 30c is defined between the axial lines c22, c23; the angle between the rotating cylinder 30c and the rotating cylinder 30a β is bounded between axial lines c21, c23.

In another implementation, the rotating cylinders 30a, 30b, 30c radially disposed on the radial surface 2112 of the hub 210 of the rotating body 20 are arranged asymmetrically, as shown in FIG. 8B . The asymmetric arrangement means that the angles α, β and γ of the two rotating cylinders 30a, 30b and 30c are different. To sum up, the present invention has the following advantages;

1. The first conductive portion 24 and the second conductive portion 25 can provide power to the second stator group of each rotating cylinder 30 disposed on the outer surface of the rotating body 20 when the rotating body 20 of the cooling fan 10 rotates. 32 to drive the rotating cylinder 30 to rotate itself, so as to avoid the interference of the power supply lines.

2. The rotating cylinder 30 disposed on the axial surface 2111 of the hub 210 will generate radial radial flow, and disposed on the radial side surface 2112 of the hub 210 will generate axial flow.

3. The air flow derived from the rotating cylinder 30 has a relatively low noise level under the same antipyretic condition because it has not undergone the interaction of known changes of the airfoil blades.

4. The air flow out through the rotating cylinder 30 is relatively convergent and has a wide range, so the heating elements in the system can be directly guided by the air flow to the heat source or directly circulated to take away the heat source.

The present invention has been described in detail above, but the above is only a preferred embodiment of the present invention, and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the scope of the application of the present invention should still fall within the scope of the patent of the present invention.

Claims (15)

1. a cooling fan structure of a cylindrical fan blade, is characterized in that, comprises: A rotating body includes a first rotor group and a first stator group, the first stator group correspondingly drives the first rotor group of the rotating body to rotate, a first conductive part is arranged in the first rotor group, a The second conductive portion is disposed in the first stator group and correspondingly contacts the first conductive portion; and A plurality of rotating cylinders are arranged on an outer surface of the first rotor group to rotate with the rotating body, and respectively include a second rotor group and a second stator group, and the second rotor group corresponds to the second stator group to drive The rotating cylinder self-rotates, the second stator group is electrically connected to the first conductive portion, Wherein, the first rotor group includes a hub, the first conductive part includes a first cantilever rod and a second cantilever rod opposite, one end of the first cantilever rod is connected to the wheel hub, and the other end is provided with a first support shaft , a first roller movably sleeves the first support shaft; one end of the second cantilever rod is connected to the hub, the other end is provided with a second support shaft, a second roller movably sleeves the second support shaft and is connected with the hub The first rollers are arranged oppositely. 2 . The cooling fan structure of the cylindrical fan blade according to claim 1 , wherein the hub has an outer surface, a first inner space and a second inner space, and the second inner space is annularly arranged in the Outside the first inner space, the first inner space is provided with a hub shaft, the hub shaft is connected to the wheel hub, the first inner space also accommodates a first shell and a first magnetic element, the first magnetic element The second inner space is provided with the first conductive portion. 3 . The cooling fan structure of claim 2 , wherein an annular partition wall is disposed between the first inner space and the second inner space. 4 . 4 . The cooling fan structure of claim 2 , wherein the first cantilever rod is connected to a first guide wire, the second cantilever rod is connected to a second guide wire, and the first cantilever rod is connected to a second guide wire. 5 . A guide wire and the second guide wire extend through the hub to the outside of the hub. 5 . The cooling fan structure of claim 2 , wherein the first stator group comprises a first base, the first base is provided with a central shaft, the central shaft There is at least one bearing inside to support the hub shaft, a first stator winding set is sleeved on an outer side of the central shaft barrel and corresponds to the position of the first magnetic element, and the second conductive portion is arranged on the on the first base and outside the stator winding. 6 . The cooling fan structure of the cylindrical fan blade according to claim 5 , wherein the second conductive portion comprises a first protruding ring body and a second protruding ring body which are concentric circles, and 6 . The first protruding ring body is connected to one of a positive electrode and a negative electrode of an external power supply, the second protruding ring body is connected to the other one of the positive electrode and the negative electrode, wherein the second protruding ring body is located on the first protruding ring Out of the outer side of the ring body, the first protruding ring body has a fixed end connected to the base and a free end contacting the first conductive portion, and the second protruding ring body has a fixed end connected to the base end and a free end contacting the first conductive portion. 7 . The cooling fan structure of the cylindrical fan blade according to claim 2 , wherein the outer surface of the hub has an axial surface and a radial surface, and the rotating cylinder is disposed on the axial surface or the radial surface. 8 . radial surface. 8 . The cooling fan structure of the cylindrical fan blade according to claim 7 , wherein the rotating cylinders are arranged symmetrically or asymmetrically. 9 . 9 . The cooling fan structure of the cylindrical fan blade according to claim 1 , wherein the second rotor group comprises a cylindrical body, one end of the cylindrical body is provided with a cylindrical inner chamber, and the cylindrical inner chamber is provided with a connection connecting the A cylindrical shaft of the cylindrical body, and the cylindrical inner chamber is provided with a second shell and a second magnetic element, and the second magnetic element is disposed on an inner side of the second shell. 10 . The cooling fan structure of the cylindrical fan blade according to claim 9 , wherein the second stator group comprises a second base, and the second base is protruded with a central shaft tube, the central shaft At least one bearing is arranged in the barrel to support the cylindrical shaft, and a second stator winding set is sleeved on an outer side of the central shaft barrel to correspond to the second magnetic element. 11 . The cooling fan structure of claim 10 , wherein the second base is provided with a fixing portion, and the fixing portion is connected to an outer surface of the first rotor set. 12 . 12 . The cooling fan structure of the cylindrical fan blade according to claim 9 , wherein at least one protruding strip is formed on an outer peripheral surface of the cylindrical body. 13 . 13 . The cooling fan structure of the cylindrical fan blade according to claim 12 , wherein the protruding strips comprise a spiral shape, a wing shape, a waterwheel shape, or a segmented radial distribution shape. 14 . 14 . The cooling fan structure of claim 1 , wherein the radii of the rotating cylinders are the same or different. 15 . 15 . The cooling fan structure of claim 1 , wherein the rotational speeds of the rotating cylinders are the same or different. 16 .