Fan impeller

Abstract

The fan impeller comprises an impeller support, the impeller support is provided with a boss and a bearing bottom plate, the bearing bottom plate is arranged on the peripheral edge of the boss in a surrounding mode, and the bearing bottom plate and the boss are integrally formed; the bearing bottom plate is provided with a first side used for being connected with the peripheral face of the boss and a second side far away from the boss, the bearing bottom plate gradually inclines upwards from the second side to the first side, an included angle a is formed between the inclined plane of the bearing bottom plate and the rotating plane of the impeller support, and a is larger than 0 degree and smaller than or equal to 20 degrees; the plurality of blades are arranged on the bearing bottom plate and are distributed around the circumference of the central axis of the boss at intervals; the blades extend in an arc shape in the radial direction of the bearing bottom plate. According to the fan impeller, the bearing bottom plate is obliquely arranged, the axial height of the blades connected to the bearing bottom plate is increased, and the utilization efficiency of the blades is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of impellers, and in particular to a fan impeller. Background Art

[0002] At present, the main structural components of the fan are impeller, casing, air inlet, bracket, motor, pulley, coupling, muffler, transmission parts (bearings), etc. The motor is mainly used to drive the impeller to rotate, and the rotation of the impeller drives the gas flow to achieve air convection to achieve heat dissipation and other effects.

[0003] The commonly used fan system is an axial flow fan system, that is, the air intake and air outlet of the fan are all along its axial direction. However, in order to increase the air volume, the axial height of the blade is generally increased, which can increase the contact area between the axial blade and the air when the blade rotates, and increase the drainage volume when rotating. However, the increase in blade height is related to the production cost of the blade. On the other hand, the increase in the overall height of multiple blades will also increase the volume and weight of the wind wheel, which will bring disadvantages such as high noise and easy vibration. Summary of the invention

[0004] In order to overcome at least one of the defects of the prior art described above, the present invention provides a fan impeller, whose supporting base is inclined to increase the axial height of the blades connected to the supporting base, thereby improving the blade utilization efficiency.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] A fan impeller, comprising an impeller support, the impeller support having a boss and a supporting bottom plate, the supporting bottom plate being arranged around the outer peripheral edge of the boss and being integrally formed with the boss; the supporting bottom plate having a first side for engaging with the outer peripheral surface of the boss and a second side away from the boss, the supporting bottom plate gradually tilting upward from the second side to the first side, the inclined plane of the supporting bottom plate and the rotation plane of the impeller support forming an angle a, and 0°<a≤20°;

[0007] A plurality of blades are arranged on the supporting base plate and are distributed at intervals around the central axis of the boss; the blades extend in an arc shape along the radial direction of the supporting base plate.

[0008] Furthermore, the ends of the plurality of blades close to the boss are connected to an inner circle; the contact point between the blade and the inner circle is point A, the tangent of the blade at point A is defined as the first tangent, and the tangent of the inner circle at point A is defined as the second tangent, the first tangent and the second tangent intersect at point A and form an inlet angle b, and 140°≤b≤160°.

[0009] Furthermore, the ends of the plurality of blades away from the boss are connected to an outer circle; the contact point between the blade and the inner circle is point B, the tangent of the blade at point B is defined as the third tangent, and the tangent of the inner circle at point B is defined as the fourth tangent, the third tangent and the fourth tangent intersect at point B and form an inlet angle c, and 140°≤c≤160°.

[0010] Further, the first tangent line intersects with the second tangent line and forms a rotation angle d of the blade, and 55°≤d≤75°.

[0011] Furthermore, the impeller support also includes a support ring, and the ends of the plurality of blades away from the boss are all connected to the inner side wall of the support ring; the outer circle coincides with the projection of the support ring.

[0012] Furthermore, a plurality of counterweight grooves are provided on the end surface of the support ring away from the supporting base plate, and the plurality of counterweight grooves are distributed at intervals around the circumference of the central axis of the support ring.

[0013] Furthermore, a plurality of first reinforcing ribs are connected between the outer peripheral edge of the supporting base plate and the bracket ring, and each of the first reinforcing ribs is connected to an end of each of the blades away from the boss.

[0014] Furthermore, the first reinforcing ribs extend in an arc shape in the radial direction of the supporting base plate, and the arc extension direction of each of the first reinforcing ribs is consistent with the arc extension direction of each of the blades.

[0015] Furthermore, the first side is provided with a circular arc plate segment, and the first side is connected to the outer peripheral surface of the boss through the circular arc plate segment.

[0016] Furthermore, a plurality of second reinforcing ribs are provided at the bottom end of the arc plate segment, and the plurality of second reinforcing ribs are distributed at intervals around the circumference of the central axis of the boss.

[0017] Furthermore, the bottom end surface of the supporting base plate is provided with a plurality of annular ribs and a plurality of radial ribs, and the plurality of annular ribs are spaced apart from the inside to the outside around the central axis of the supporting base plate; the plurality of radial ribs are spaced apart circumferentially around the central axis of the supporting base plate and connect the respective annular ribs.

[0018] Furthermore, a mounting groove is provided inside the boss, a filling groove is provided on the end wall of the mounting groove, a plurality of protruding blocks are provided on the inner peripheral wall of the filling groove, and the plurality of protruding blocks are distributed at intervals around the circumference of the central axis of the boss.

[0019] In summary, the present invention has the following technical effects:

[0020] Since the supporting base plate gradually tilts upward from the second side to the first side, the blades arranged on the supporting base plate can also gradually increase upward from the outside to the inside. Therefore, in the case of blades of the same height, since the height of the supporting base plate gradually increases or decreases from the outside to the inside, the axial height of the blades connected thereto can be increased from the outside to the inside, thereby improving the utilization efficiency of the fan blades.

[0021] In addition, since the blades are extended in an arc shape in the radial direction, the airflow disturbance points distributed in the radial direction of the blades are not on a straight line, but on a circular arc curve. The same blade can be distributed with different disturbance points in the radial and circumferential directions. During one rotation, disturbance can be performed by different blade breakpoints in both the circumferential and radial directions, and the blade utilization rate is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is another perspective structural schematic diagram of the present invention;

[0024] Figure 3 It is another perspective structural schematic diagram of the present invention;

[0025] Figure 4 for Figure 3 AA section view in.

[0026] Among them, the meanings of the figure numbers are as follows: 10, impeller bracket; 11, boss; 111, mounting groove; 112, filling groove; 113, protruding block; 12, supporting base plate; 121, annular rib; 122, radial rib; 13, arc plate segment; 131, second reinforcing rib; 14, bracket ring; 141, counterweight groove; 20, blade; 30, first reinforcing rib. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] See also Figure 1-4 The present invention discloses a fan impeller, including an impeller bracket 10 and a plurality of blades 20. The impeller bracket 10 has a boss 11 and a supporting base plate 12. The supporting base plate 12 is arranged around the outer periphery of the boss 11 and is integrally formed with the boss 11.

[0031] The supporting bottom plate 12 has a first side and a second side. In the present embodiment, the first side is relatively close to the inner side of the boss 11, and the second side is relatively far from the outer side of the boss 11. The supporting bottom plate 12 and the outer peripheral surface of the boss 11 are connected with each other at the first side. Specifically, the supporting bottom plate 12 gradually tilts upward from the second side to the first side, and the inclined plane of the supporting bottom plate 12 forms an angle a with the rotation plane of the bracket, and 0°<a≤30°. It should be noted that the rotation plane referred to in the present embodiment refers to the plane formed when the impeller bracket 10 rotates with the central axis of the boss 11 as the rotation axis.

[0032] The plurality of blades 20 are all disposed on the supporting base plate 12 , and the plurality of blades 20 are circumferentially spaced around the central axis of the boss 11 , and a single blade 20 extends in an arc shape along the radial direction of the supporting base plate 12 .

[0033] On the basis of the above structure, when the fan impeller of the present invention is used, the boss 11 in the middle of the impeller bracket 10 can be connected to the rotating shaft of the motor, and the rotating shaft of the motor can drive the impeller bracket 10 to rotate, and the multiple blades 20 on the supporting base plate 12 can also rotate during the rotation of the impeller bracket 10 to disturb the gas flow.

[0034] In this embodiment, multiple blades 20 are arranged on the supporting base plate 12, and a single blade 20 extends in a circular arc from the outside to the inside in the radial direction of the supporting base plate 12. Since the supporting base plate 12 gradually tilts upward from the second side to the first side, that is, the point on the outermost side of the supporting base plate 12 is the lowest point, and the innermost point of the supporting base plate 12 is the highest point, the blades 20 are arranged on the supporting base plate 12 and can also gradually increase upward from the outside to the inside. Therefore, in the case of blades 20 of the same height, since the height of the supporting base plate 12 gradually increases or decreases from the outside to the inside, the axial height of the blades 20 connected thereto from the outside to the inside can be increased, thereby improving the utilization efficiency of the fan blades.

[0035] In addition, since the blades 20 are extended in an arc shape in the radial direction, the airflow disturbance points distributed in the radial direction of the blades 20 are not on a straight line, but on a circular arc curve. The same blade 20 can be distributed with different disturbance points in the radial and circumferential directions. During one rotation, disturbance can be performed by different breakpoints of the blades 20 in both the circumferential and radial directions, and the utilization rate of the blades 20 is higher.

[0036] Of course, the inclined plane of the supporting bottom plate 12 forms an angle a with the rotation plane of the bracket, and 0°<a≤20°. The following embodiments and comparative examples are used for explanation:

[0037] Angle a Corresponding blade height H / mm Air volume (m3 / min) Example 1 0° 27.9 1.32 Example 2 11.5 21.5 1.37 Example 3 20° 17 1.2 Comparative Example 1 30° 10 1.15

[0038] Table 1

[0039] It can be seen from the embodiments that, from embodiment 1, when the angle a is 0°, the corresponding blade height is 27.9mm, and the guided air volume is 1.32m3 / min. From embodiment 2, it can be seen that when the angle a is 11.5°, the corresponding blade height is 21.5mm, and the guided air volume is 1.37m3 / min. From embodiment 3, it can be seen that when the angle a is 20°, the corresponding blade height is 17mm, and the guided air volume is 1.2m3 / min. The inclination angle of the supporting bottom plate 12 is different, the height of the blade 20 is different, and the corresponding air volume and wind speed are also different. When the inclination angle is within the range of 0-20°, the blade height is higher and the air volume is also larger. Referring to comparative example 1, when the angle a is 30°, the corresponding blade height is 10mm, and the guided air volume is 1.15m3 / min. At this time, the blade air volume is significantly reduced.

[0040] Furthermore, the ends of the plurality of blades 20 close to the boss 11 are connected to an inner circle; the contact point between the blade 20 and the inner circle is point A, and the tangent line of the blade 20 at point A is defined as the first tangent line (see Figure 3 L1 in ), define the tangent line of the inner circle at point A as the second tangent line (see Figure 3 L2 in the figure), the first tangent and the second tangent intersect at point A and form an inlet angle b, and 140°≤b≤160°.

[0041] Furthermore, the ends of the plurality of blades 20 away from the boss 11 are connected to an outer circle; the contact point between the blade 20 and the inner circle is point B, and the tangent line of the blade 20 at point B is defined as the third tangent line (see Figure 3 L3 in ), define the tangent line of the inner circle at point B as the fourth tangent line (see Figure 3 L4 in the figure), the third tangent and the fourth tangent intersect at point B and form an inlet angle c, and 140°≤c≤160°.

[0042] The following examples and comparative examples are described in detail:

[0043] Angle b Angle c Air volume (m3 / min) Example 4 140° 140° 1.28 Example 5 150° 150° 1.37 Example 6 160° 160° 1.34 Comparative Example 2 130° 130° 1.08 Comparative Example 3 170° 170° 1.11

[0044] Table 2

[0045] It can be seen from Example 4 that when the angle b and the angle c are both 140°, the air volume at the corresponding blade position is 1.28m3 / min. It can be seen from Example 5 that when the angle b and the angle c are both 150°, the guided air volume at the corresponding blade position is 1.37 / min. It can be seen from Example 6 that when the angle b and the angle c are both 160°, the guided air volume at the corresponding blade position is 1.34m3 / min. That is, when the angle range of the angle b and the angle c is within the range of 140°-160°, the blades can maintain a relatively large wind speed and air volume. According to Comparative Example 2, it can be seen that the angle b and the angle c are both 130°, and the air volume at the corresponding blade position is only 1.08m3 / min. According to Comparative Example 3, it can be seen that the angle b and the angle c are both 170°, and the air volume at the corresponding blade position is only 1.11m3 / min. The air volumes are relatively small.

[0046] According to the above embodiments and comparative examples, it can be known that under different air inlet angles and air outlet angles, at the same or similar motor speeds, the leakage of air volume is further reduced, and the air outlet volume is further increased, while the noise is also reduced, making the gas flow of the entire fan system smoother.

[0047] Further, the first tangent line intersects with the second tangent line and forms a rotation angle d of the blade 20 , and 55°≤d≤75°.

[0048] The following examples and comparative examples are described in detail:

[0049] Corner angle d Air volume (m3 / min) Example 7 55° 1.31 Example 8 65° 1.36 Example 9 75° 1.25 Comparative Example 4 45° 1.18

[0050] Table 3

[0051] Similarly, from Example 7, it can be seen that when the angle d is 55°, the wind volume at the corresponding blade position is 1.31m3 / min. From Example 8, it can be seen that when the angle d is 65°, the guided wind volume at the corresponding blade position is 1.36 / min. From Example 9, it can be seen that when the angle d is 75°, the guided wind volume at the corresponding blade position is 1.25m3 / min. That is, when the angle d is within the range of 55°-75°, the blades can maintain a relatively large wind speed and wind volume. According to Comparative Example 4, it can be seen that when the angle d is 45°, the wind volume at the corresponding blade position is only 1.18m3 / min, which is relatively small.

[0052] According to the above embodiments and comparative examples, it can be known that under different air inlet angles and air outlet angles, at the same or similar motor speeds, the leakage of air volume is further reduced, and the air outlet volume is further increased, while the noise is also reduced, making the gas flow of the entire fan system smoother.

[0053] Furthermore, the impeller support 10 further includes a support ring 14. Specifically, the ends of the plurality of blades 20 away from the boss 11 are all connected to the inner wall of the support ring 14, and the outer circle coincides with the projection of the support ring 14, that is, on the basis of the structure provided with the support ring 14, the outermost sides of the plurality of blades 20 are all connected to the support ring 14, and a flow gap is formed between the support ring 14 and the supporting bottom plate 12, so that the support ring 14 can connect the plurality of blades 20 into one on the outer sides of the plurality of blades 20, thereby increasing the overall strength of the fan impeller. The flow gap between the support ring 14 and the supporting bottom plate 12 can allow the gas between the blades 20 to flow in and out, without affecting the gas flow.

[0054] More specifically, a plurality of weight balancing grooves 141 may be provided on the end surface of the support ring 14 away from the supporting base plate 12, and the plurality of weight balancing grooves 141 are distributed at intervals around the central axis of the support ring 14. Since the blade 20 support is generally formed in an integrally formed manner, after processing and forming, the impeller support 10 may have a part with more fillers and a part with less fillers, so that the impeller support 10 formed in this way may be eccentric as a whole. After being assembled with the rotating shaft of the motor, due to the offset of the center of gravity, the impeller may be unstable when rotating as a whole, and may collide and cause loud noise.

[0055] Therefore, in this embodiment, a plurality of counterweight grooves 141 can be processed on the circumference of the bracket ring 14, and filler space can be reserved on the circumference of the bracket ring 14. In this way, when the center of gravity shifts, secondary filling can be performed in the counterweight grooves 141 at corresponding positions on the circumference according to the eccentric position. In this way, the center of gravity can be adjusted to make the overall center of gravity of the impeller bracket 10 stable.

[0056] Specifically, the secondary filling in the counterweight groove 141 may be refilled through a mold, or may be directly filled with a counterweight block or other structure, and the specific selection may be made according to actual needs.

[0057] Furthermore, since a flow space is reserved between the bracket ring 14 and the supporting base plate 12, the bracket ring 14 may not be strong enough. Therefore, a plurality of first reinforcing ribs 30 may be connected between the outer peripheral edge of the supporting base plate 12 and the bracket ring 14. Each first reinforcing rib 30 is connected to the end of each blade 20 away from the boss 11. The first reinforcing rib 30 may be connected at the outer end of the blade 20 between the bracket ring 14 and the outer peripheral edge of the supporting base plate 12, connecting the outer end of the blade 20, the bracket ring 14 and the supporting base plate 12 to form an integrated structure, forming a reinforced structure on the outside, and the first reinforcing rib 30 is connected corresponding to the position of each blade 20, so as not to interfere with the gas flow between the blades 20.

[0058] Furthermore, if the first reinforcing ribs 30 are connected to the outer ends of the blades 20, and the blades 20 are arranged in an arc shape, if the first reinforcing ribs 30 are arranged radially or circumferentially separately, they will more or less block part of the airflow at the ends of the blades 20, affecting the smoothness of the gas flow. Therefore, in this embodiment, the first reinforcing ribs 30 extend in an arc shape in the radial direction of the supporting base plate 12, and the arc extension direction of each first reinforcing rib 30 is consistent with the arc extension direction of each blade 20. In this way, the first reinforcing ribs 30 not only play a reinforcing role and do not block the airflow, but also can guide the airflow to be further discharged when the blade 20 flows to the outermost end of the blade 20, thereby increasing the guide area and improving the utilization rate.

[0059] Furthermore, an arc plate segment 13 can be provided on the first side. Specifically, the arc plate segment 13 can connect the first side of the supporting base plate 12 to the outer peripheral surface of the boss 11. That is, when the supporting base plate 12 gradually tilts upward from the outside to the inside, there is still an arc plate segment 13 between the first side and the outer peripheral surface of the boss 11. The arc plate segment 13 is connected to the inner side of the supporting base plate 12. When the arc plate segment 13 is subjected to force, the force at various locations can be distributed on the arc surface, with more dispersed support force points and better strength.

[0060] Furthermore, since the bottom end of the arc plate segment 13 is non-planar, a plurality of second reinforcing ribs 131 may be provided at the bottom end of the arc plate segment 13. The plurality of second reinforcing ribs 131 are distributed at intervals around the circumference of the central axis of the boss 11. Since the end face of the arc plate segment 13 is non-planar, a hollow position is formed between the supporting base plate 12 and the boss 11 after being connected with the boss 11. Therefore, a plurality of second reinforcing ribs 131 may be provided at the bottom end of the arc plate segment 13 to enhance the overall strength of the impeller bracket 10.

[0061] Similarly, the supporting bottom plate 12 is also tilted, and its bottom end is not completely flush with the horizontal plane, so a certain hollow structure will be formed at the bottom end of the impeller bracket 10, affecting the overall strength. Therefore, a plurality of annular ribs 121 and a plurality of radial ribs 122 can be provided on the bottom end surface of the supporting bottom plate 12, and the plurality of annular ribs 121 are spaced from the inside to the outside around the central axis of the supporting bottom plate 12, and the plurality of radial ribs 122 are spaced around the circumference of the central axis of the supporting bottom plate 12, and each annular rib 121 is connected. The annular ribs 121 and the radial ribs 122 can strengthen the strength of the supporting bottom plate 12, and with such a structure, a vacancy can be formed after the annular ribs 121 and the radial ribs 122 are connected, which can strengthen the strength and reduce the weight of the supporting bottom plate 12, reduce the overall weight of the impeller bracket 10, and rotate more smoothly when rotating.

[0062] Furthermore, a mounting groove 111 is provided inside the boss 11. When the rotating shaft of the motor is assembled with the impeller bracket 10, it will extend into the mounting groove 111 and be glued and fixed with glue. When gluing, if the end wall and the inner wall of the mounting groove 111 are smooth, the glue will overflow from the side wall to the end wall and flow inside the end wall during gluing, causing the glue to flow to various positions of the rotor. Therefore, a filling groove 112 can be provided on the end wall of the mounting channel, and a plurality of protruding blocks 113 are provided in the filling recess. The plurality of protruding blocks 113 are distributed at intervals around the circumference of the central axis of the boss 11. The filling groove 112 can receive the glue flowing from the side wall, and the protruding blocks 113 can separate the filling groove 112, limit the glue to the corresponding position, reduce the flow of glue, and achieve a better gluing effect.

[0063] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A fan impeller, characterized in that: include, An impeller support, the impeller support having a boss and a supporting bottom plate, the supporting bottom plate being arranged around the outer peripheral edge of the boss and being integrally formed with the boss; the supporting bottom plate having a first side for engaging with the outer peripheral surface of the boss and a second side away from the boss, the supporting bottom plate gradually tilting upward from the second side to the first side, the inclined plane of the supporting bottom plate and the rotation plane of the impeller support forming an angle a, and 0°<a≤20°; A plurality of blades are arranged on the supporting base plate and are distributed at intervals around the central axis of the boss; the blades extend in an arc shape along the radial direction of the supporting base plate.

2. The fan impeller according to claim 1, characterized in that: The ends of the plurality of blades close to the boss are connected to an inner circle; the contact point between the blade and the inner circle is point A, the tangent of the blade at point A is defined as the first tangent, and the tangent of the inner circle at point A is defined as the second tangent, the first tangent and the second tangent intersect at point A and form an inlet angle b, and 140°≤b≤160°.

3. The fan impeller according to claim 2, characterized in that: The ends of the plurality of blades away from the boss are connected to an outer circle; the contact point between the blade and the inner circle is point B, the tangent of the blade at point B is defined as the third tangent, and the tangent of the inner circle at point B is defined as the fourth tangent, the third tangent and the fourth tangent intersect at point B and form an inlet angle c, and 140°≤c≤160°.

4. The fan impeller according to claim 3, characterized in that: The first tangent line intersects with the second tangent line and forms a turning angle d of the blade, and 55°≤d≤75°.

5. The fan impeller according to claim 3, characterized in that: The impeller support also includes a support ring, and the ends of the plurality of blades away from the boss are all connected to the inner side wall of the support ring; the outer circle coincides with the projection of the support ring.

6. The fan impeller according to claim 5, characterized in that: The end surface of the support ring away from the supporting base plate is provided with a plurality of counterweight grooves, and the plurality of counterweight grooves are distributed at intervals around the circumference of the central axis of the support ring.

7. The fan impeller according to claim 5, characterized in that: A plurality of first reinforcing ribs are connected between the outer peripheral edge of the supporting base plate and the bracket ring, and each of the first reinforcing ribs is connected to an end of each of the blades away from the boss.

8. The fan impeller according to claim 7, characterized in that: The first reinforcing ribs extend in an arc shape in the radial direction of the supporting base plate, and the arc extension direction of each of the first reinforcing ribs is consistent with the arc extension direction of each of the blades.

9. The fan impeller according to any one of claims 1 to 8, characterized in that: The first side is provided with a circular arc plate segment, and the first side is connected to the outer peripheral surface of the boss through the circular arc plate segment.

10. The fan impeller according to claim 9, characterized in that: A plurality of second reinforcing ribs are disposed at the bottom end of the arc plate segment, and the plurality of second reinforcing ribs are distributed at intervals around the central axis of the boss.

11. The fan impeller according to any one of claims 1 to 8, characterized in that: The bottom end surface of the supporting base plate is provided with a plurality of annular ribs and a plurality of radial ribs, wherein the plurality of annular ribs are spaced from the inside to the outside around the central axis of the supporting base plate; and the plurality of radial ribs are spaced circumferentially around the central axis of the supporting base plate and connect the respective annular ribs.

12. The fan impeller according to any one of claims 1 to 8, characterized in that: A mounting groove is provided inside the boss, a filling groove is provided on the end wall of the mounting groove, a plurality of protruding blocks are provided on the inner peripheral wall of the filling groove, and the plurality of protruding blocks are distributed at intervals around the circumference of the central axis of the boss.

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