A suction type wind wheel of a brushless fan

Abstract

The present invention discloses a suction-type wind wheel of a brushless fan, belongs to the field of fans, and solves the technical problem of insufficient efficiency of the suction-type wind wheel of the brushless fan in the prior art. The present invention provides a suction-type wind wheel of a brushless fan, comprising an inner hub, an outer ring, and a plurality of blades radially arranged between the inner hub and the outer ring, wherein the blades comprise a blade root extending from the outer circular surface of the inner hub, a blade tip extending from the end of the blade root toward the outer ring and bending along the circumferential direction, the width of the blade tip gradually widens from the blade root toward the outer ring, and the blade has a concave surface facing the outside of the brushless fan.

Description

Technical Field

[0001] The invention relates to a brushless fan wheel. Background Art

[0002] The research and improvement of fan blade performance are the development direction of fan blades. The market has put forward higher and higher requirements on the performance indicators of fans. Air volume, wind speed, energy efficiency and noise are four important indicators. The quality of fan blade design is the key factor that determines the achievement of these four important indicators. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a suction type wind wheel of a brushless fan to improve the working performance of the suction type wind wheel.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A suction-type impeller of a brushless fan comprises an inner hub, an outer ring, and a plurality of blades radially arranged between the inner hub and the outer ring, wherein the blades comprise a blade root extending from the outer circumferential surface of the inner hub, a blade tip extending from the end of the blade root toward the outer ring and bending along the circumferential direction, the width of the blade tip gradually widens from the blade root toward the outer ring, and the blades have a concave surface facing the outside of the brushless fan.

[0006] Furthermore, a thickened portion is provided at one end of the blade root connected to the inner hub, and the thickness of the thickened portion is (1.1-1.2)*the thickness of the blade.

[0007] Furthermore, a plurality of elastic connecting ribs are provided between the blades and the outer ring.

[0008] Furthermore, the width of the elastic connecting rib is 2mm-4mm.

[0009] Furthermore, the spacing between the elastic connecting ribs is 12mm-18mm.

[0010] Furthermore, the suction-type wind wheel also includes a counterweight mechanism.

[0011] Further, the counterweight mechanism includes a counterweight block, and the outer ring is provided with a plurality of mounting grooves for mounting the counterweight block along the circumferential direction; or, the counterweight mechanism includes a mounting sleeve and a counterweight body, the mounting sleeve is provided with an assembly groove for mounting the counterweight body, and the mounting sleeve is installed on the outer ring.

[0012] Furthermore, the inner wall of the outer ring is provided with a spiral groove arranged between adjacent blades along the torsion direction of the blades.

[0013] Furthermore, the inner hub, outer ring and blades are integrally formed.

[0014] Beneficial effects of the present invention:

[0015] The suction-type wind wheel of the brushless fan of the present invention has a blade including a blade root extending from the inner hub in the circumferential direction, a blade tip extending from the end of the blade root toward the outer ring and bending in the circumferential direction, the width of the blade tip gradually widens from the blade root toward the outer ring, and the blade has a concave surface facing the outside of the brushless fan. The blade structure is optimized to conform to aerodynamics, and the blade is set with a concave surface facing the outside of the brushless fan to enhance the suction force and improve efficiency; and the blade tip width is large, which increases the area of ​​the blade, enhances the wind wheel's suction capacity, and effectively increases the fan air volume under the same size specification.

[0016] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a front view of the wind wheel of the present invention;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 The structure of the wind wheel of the present invention is schematically shown in FIG. Figure 1 ;

[0021] Figure 4 The structure of the wind wheel of the present invention is schematically shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0022] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention.

[0023] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, a suction-type wind wheel of a brushless fan shown in the figure comprises an inner hub 1, an outer ring 3, and a plurality of blades 2 radially arranged between the inner hub 1 and the outer ring 3. The inner hub 1 is connected to a driving assembly of the fan, and the driving assembly drives the wind wheel to rotate. The blade 2 comprises a blade root 21 extending circumferentially from the inner hub 1, and a blade tip 22 extending from the end of the blade root 21 toward the outer ring 3 and bending along the circumferential direction. The width of the blade tip 22 gradually widens from the blade root 21 toward the outer ring 3, and the blade 2 has a concave surface 23 facing the outside of the brushless fan. The structure of the blade 2 is optimized to conform to aerodynamics. The concave surface 23 of the blade 2 facing the outside of the brushless fan can enhance the suction force and improve efficiency. Moreover, the blade tip 22 has a large width, which increases the area of ​​the blade 2, enhances the suction capacity of the wind wheel, effectively increases the wind volume of the fan under the same size specification, and improves the wind volume and wind force. Preferably, the bending angle of the blade tip 22 is 10°-15°.

[0024] In the present invention, the torsion angle A of the blade 2 satisfies: A is at least 15° and at most 35°. The blade 2 is twisted at a certain angle, and the torsion angle of the blade 2 depends on the length of the blade 2, the radius of the inner hub 11 and the height of the blade 2, which is more in line with the aerodynamic state, can reduce the generation of vortex of the blade 2, make the wind flow smoother, reduce the resistance of blowing, and make the wind force strong and stable.

[0025] A thickened portion 4 is provided at one end where the blade root 21 is connected to the inner hub 1. The thickness of the thickened portion 4 is (1.1-1.2)*the thickness of the blade. The strength of the connection between the blade root 21 and the inner hub 1 is increased by the thickened portion 4. The thickened portion 4 protrudes from the two side surfaces of the blade root 21, and an inclined surface is provided on the thickened portion 4.

[0026] A plurality of elastic connecting ribs are provided between the blades and the outer ring. The blades and the outer ring are connected by the elastic connecting ribs. The elastic connecting ribs can reduce the weight of the blades, and the stress and fatigue load of the blades can be reduced through the gaps between the elastic connecting ribs. Moreover, the elastic connecting ribs have the ability to deform, and the elastic deformation can buffer and reduce the vibration of the impeller.

[0027] Preferably, the width of the elastic connecting rib is 2mm-4mm. If the width of the elastic connecting rib is too large, it is not easy to deform and the buffering and shock absorbing ability is weak. If the width of the elastic connecting rib is too small, the strength is insufficient and the service life cannot be guaranteed. In addition, the spacing between adjacent elastic connecting ribs is 8mm-15mm, which is also used to ensure that the blade has good elastic deformation ability and reliable strength.

[0028] The inner hub 1, the outer ring 3 and the blades 2 are integrally formed, and are easy to process with high precision.

[0029] Due to manufacturing or processing errors, the center of gravity of the impeller may deviate from the rotation axis of the impeller, which will cause a lot of noise during the rotation of the impeller, and the impeller tilt affects the efficiency of the fan. Therefore, the wind wheel also includes a counterweight mechanism, which adjusts the center of gravity of the impeller so that the center of gravity of the impeller coincides with the rotation axis of the impeller, so that the impeller rotates stably, with less vibration and noise.

[0030] Preferably, the counterweight mechanism includes a counterweight block, and a mounting groove for mounting the counterweight block is provided on the outer ring. When the center of gravity of the impeller deviates from the central axis of the impeller, the counterweight block is installed in the mounting groove of the outer ring located at the lighter side of the impeller, so that the circumferential mass distribution of the impeller is uniform, thereby ensuring that the center of gravity of the impeller does not deviate from the central axis of the impeller, the rotation of the impeller is more stable, the vibration and noise of the impeller during operation are reduced, and the service life of the fan is extended. In other embodiments of the present invention, the counterweight mechanism may also include a mounting sleeve and a counterweight body, the outer circumferential surface of the outer ring is clamped with the mounting sleeve, the mounting sleeve is provided with an assembly groove for mounting the counterweight body, and the counterweight block is installed in the assembly groove of the outer ring located at the lighter side of the impeller.

[0031] In addition, the inner wall of the outer ring is provided with a spiral groove arranged between adjacent blades along the torsion direction of the blades. The spiral groove has a drainage function, further reducing resistance, reducing vibration of the impeller, and reducing noise.

[0032] Through the above embodiments, the purpose of the present invention has been fully and effectively achieved. People familiar with the technology should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A suction-type wind wheel of a brushless fan, comprising an inner hub, an outer ring, and a plurality of blades radially arranged between the inner hub and the outer ring, characterized in that: The blade comprises a blade root extending from the outer circumferential surface of the inner hub, a blade tip extending from the end of the blade root toward the outer ring and curved along the circumferential direction, the width of the blade tip gradually widens from the blade root toward the outer ring, and the blade has a concave surface facing the outside of the brushless fan; A thickened portion is provided at one end where the blade root is connected to the inner hub, and the thickness of the thickened portion is (1.1-1.2)*blade thickness; a plurality of elastic connecting ribs are provided between the blade and the outer ring; the width of the elastic connecting ribs is 2mm-4mm; the spacing between the elastic connecting ribs is 12mm-18mm; the inner wall of the outer ring is provided with a spiral groove arranged between adjacent blades along the torsion direction of the blade.

2. The suction-type impeller of the brushless blower according to claim 1, characterized in that: The suction-type wind wheel also includes a counterweight mechanism.

3. The suction-type impeller of the brushless blower according to claim 2, characterized in that: The counterweight mechanism comprises a counterweight block, and the outer ring is provided with a plurality of mounting grooves for mounting the counterweight block along the circumferential direction.

4. The suction-type impeller of the brushless blower according to claim 2, characterized in that: The counterweight mechanism comprises a mounting sleeve and a counterweight body. The mounting sleeve is provided with an assembly groove for mounting the counterweight body, and the mounting sleeve is mounted on the outer ring.

5. The suction-type impeller of the brushless blower according to claim 1, characterized in that: The inner hub, outer ring and blades are integrally formed.

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