CN217976675U

CN217976675U - Vibration-damping noise-reducing type short-diameter fan blade of axial flow fan

Info

Publication number: CN217976675U
Application number: CN202222354287.0U
Authority: CN
Inventors: 王诤
Original assignee: Hangzhou Winway Electronics Co ltd
Current assignee: Hangzhou Winway Electronics Co ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-12-06
Anticipated expiration: 2032-09-05

Abstract

The utility model discloses a type of making an uproar minor diameter fan blade falls in damping, wheel hub is the scattering form and follows a plurality of minor diameter blades of circumference interval offset around the axial lead, the inner edge and the wheel hub rigid coupling of minor diameter blade, the inner edge extends to the outer edge along radially outwards expanding the formula outward, the position that is close to the trailing edge in the outer edge is provided with trapezoidal damping pterygoid lamina along axial extension towards suction curved surface one side, the link length of trapezoidal damping pterygoid lamina is greater than the extension end, trapezoidal damping pterygoid lamina plate body thickness is attenuate gradually from link to extension end, the link does not bulge in the wheel hub terminal surface, the wheel hub external diameter is 100mm to 150mm, wheel hub's external diameter is 60% to 70% of fan blade external diameter. The short-diameter fan blade is provided with the short-diameter fan blade which is shorter than the outer diameter of the hub, the wind stability is improved through the optimization of the structure of the fan blade, the vibration of the fan blade can be effectively inhibited while the wind speed and the wind quantity are improved, and the wind noise is reduced.

Description

Vibration-damping noise-reducing type short-diameter fan blade of axial flow fan

Technical Field

The utility model relates to an axial fan technical field especially relates to a type of making an uproar axial fan minor diameter fan blade falls in damping.

Background

An axial-flow heat dissipation fan is also called an axial-flow fan. When the axial flow fan is operated, the blades push air to flow in the same direction as the shaft, so the axial flow fan is called. The small axial flow fan is mainly suitable for ventilation and heat dissipation of household electrical appliances, communication equipment, electrical cabinets and the like, and the size of the axial flow fan is different according to different application places and fields. In order to meet the requirement of higher standard heat radiation performance, a method of increasing the rotation speed of the fan is generally adopted, however, when the rotation speed of the fan is increased, the blades are easy to deform during rotation, so that the blades vibrate, the wind power stability is poor, and higher fan noise is also brought.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's is not enough, and the technical problem that solve provides a type of making an uproar axial fan minor diameter fan blade falls in damping, has the minor diameter blade shorter than the wheel hub external diameter, through blade structural optimization, improves wind-force stability, when improving the wind speed amount of wind, can effectively restrain the blade vibration, reduces wind and makes an uproar.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

The vibration-damping noise-reducing type short-diameter fan blade comprises a hub, wherein the hub is in a scattering shape around an axial lead and is provided with a plurality of short-diameter blades at intervals along the circumferential direction, the surfaces of two sides of each short-diameter blade are respectively provided with a suction curved surface and a pressure curved surface, the inner edge of each short-diameter blade is fixedly connected with the hub, the inner edge extends to the outer edge in an outward expanding manner along the radial direction, the short-diameter blades further comprise a front edge and a rear edge, wind is guided to the rear edge from the front edge, a trapezoidal vibration-damping wing plate is arranged on the outer edge in an axially extending manner at a position close to the rear edge and faces one side of the suction curved surface, the length of a connecting end of each trapezoidal vibration-damping wing plate is larger than that of an extending end, the thickness of a plate body of each trapezoidal vibration-damping wing plate is gradually reduced from the connecting end to the extending end, the connecting end does not protrude from the end face of the hub, the outer diameter of the hub is 100 mm-150 mm, and the outer diameter of the hub is 60% -70% of the outer diameter of the fan blade.

Preferably, the connecting end has a thickness of 0.65mm to 2mm.

Preferably, the extension end has a thickness of 0.4mm to 1.8mm.

Preferably, a connecting line of the leading edge point on the leading edge and the corresponding trailing edge point on the trailing edge is a blade chord, an inclined included angle is formed between the blade chord and a radial plane perpendicular to the axial line of the hub, and the inclined included angle is 35-60 degrees.

Preferably, the number of the short-diameter blades is five or seven.

Preferably, the inner edge has a thickness of 2.2mm to 4mm.

Preferably, the outer edge has a thickness of 1mm to 2.5mm.

Preferably, the hub, the short-diameter blade and the trapezoidal vibration reduction wing plate are all made of PC, PE or ABS materials.

Preferably, the maximum radius of curvature of the short-diameter blade gradually increases from the inner edge to the outer edge.

Preferably, the short diameter blade thickness decreases from the inner edge to the outer edge.

The utility model has the advantages that:

the trapezoidal vibration reduction wing plate is additionally arranged on the part, close to the rear edge, of the outer edge of the short-diameter blade, the connecting end of the trapezoidal vibration reduction wing plate does not protrude out of the end face of the hub, the improvement of wind stability is facilitated, the ventilation resistance of the gap between the blade and the inner ring of the outer cover of the fan is improved, the formation of reverse wind is facilitated to be reduced, the formation of air vortex is inhibited, the vibration of the blade is effectively inhibited under the condition of increasing the wind speed and the wind quantity, and therefore wind noise is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Description of reference numerals: 1-hub, 2-short-diameter blade, 3-inner edge, 4-outer edge, 5-trapezoidal vibration reduction wing plate, 6-front edge and 7-rear edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model discloses the type of making an uproar axial fan minor diameter fan blade falls in damping, including wheel hub 1, wheel hub 1 goes up and is the scattering form and has a plurality of minor diameter blades 2 along the biasing of circumference interval around the axial lead, minor diameter blade 2 can be five or seven, adopts seven in this embodiment. The outer diameter of the hub 1 is 100 mm-150 mm, and the outer diameter of the hub 1 is 60% to 70% of the outer diameter of the fan blade. The surfaces of the two sides of the short-diameter blade 2 are respectively a suction curved surface and a pressure curved surface. The inner edge 3 of the short-diameter blade 2 is fixedly connected with the hub 1, the inner edge 3 extends to the outer edge 4 in an outward expanding mode along the radial direction, specifically, the thickness of the inner edge 3 is 2.2mm to 4mm, and the thickness of the outer edge 4 is 1mm to 2.5mm. Further, the short diameter blade 2 gradually decreases in thickness from the inner edge 3 to the outer edge 4. Further, the maximum radius of curvature of the short-diameter blades 2 gradually increases from the inner edge 3 to the outer edge 4.

The short-diameter blade 2 further comprises a front edge 6 and a rear edge 7, wind is guided to the rear edge 7 from the front edge 6, furthermore, a connecting line of the front edge point on the front edge 6 and the corresponding rear edge point on the rear edge 7 is a blade chord, an inclined included angle is formed between the blade chord and a radial plane perpendicular to the axial lead of the hub 1, and the inclined included angle is 35-60 degrees.

Be close to on the outer fringe 4 the position orientation of trailing edge 7 suction curved surface one side is provided with trapezoidal damping pterygoid lamina 5 along axial extension, the link length of trapezoidal damping pterygoid lamina 5 is greater than the extension end, 5 plate body thicknesses of trapezoidal damping pterygoid lamina are followed the link extremely the extension end is attenuate gradually, specifically says, link thickness is 0.65mm to 2mm, extension end thickness is 0.4mm to 1.8mm. The connecting end does not protrude out of the end face of the hub 1. The hub 1, the short-diameter blades 2 and the trapezoidal vibration reduction wing plate 5 can be of PC, PE or ABS material structures.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. Vibration damping and noise reduction type axial flow fan minor diameter fan blade, characterized by: including wheel hub (1), be the scattering form and along circumference interval off-set a plurality of minor diameter blades (2) on wheel hub (1) around the axial lead, the both sides surface of minor diameter blade (2) is suction curved surface and pressure curved surface respectively, the inner edge (3) of minor diameter blade (2) with wheel hub (1) rigid coupling, inner edge (3) radially outwards expand the formula outward and extend to outer fringe (4), minor diameter blade (2) still include leading edge (6) and trailing edge (7), wind follow leading edge (6) direction trailing edge (7), the position orientation that is close to on outer fringe (4) trailing edge (7) suction curved surface one side is provided with trapezoidal pterygoid lamina (5) along axial extension, the link length of trapezoidal pterygoid lamina (5) is greater than the extension end, trapezoidal damping pterygoid lamina (5) plate body thickness from the link to the extension end thins gradually, the link do not bulge in wheel hub (1) terminal surface, wheel hub (1) external diameter is 100mm to 150mm, the external diameter of wheel hub (1) is 60% to 70% of external diameter.

2. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, which is characterized in that: the thickness of the connecting end is 0.65mm to 2mm.

3. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, which is characterized in that: the extension end has a thickness of 0.4mm to 1.8mm.

4. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, wherein: the connecting line of the front edge point on the front edge (6) and the corresponding rear edge point on the rear edge (7) is a blade chord, an inclined included angle is formed between the blade chord and a radial plane vertical to the axial lead of the hub (1), and the inclined included angle is 35-60 degrees.

5. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, which is characterized in that: the number of the short-diameter blades (2) is five or seven.

6. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, which is characterized in that: the thickness of the inner edge (3) is 2.2mm to 4mm.

7. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, which is characterized in that: the thickness of the outer edge (4) is 1mm to 2.5mm.

8. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, which is characterized in that: the hub (1), the short-diameter blades (2) and the trapezoidal vibration reduction wing plates (5) are all of PC, PE or ABS material structures.

9. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, wherein: the maximum curvature radius of the short-diameter blade (2) is gradually increased from the inner edge (3) to the outer edge (4).

10. The vibration-damping noise-reducing type short-diameter fan blade of the axial flow fan as claimed in claim 1, which is characterized in that: the thickness of the short-diameter blade (2) is gradually reduced from the inner edge (3) to the outer edge (4).