CN211501075U - Fan blade assembly and fan with same - Google Patents

Abstract

The application provides a fan blade subassembly includes: wheel hub, center pin, blade and connecting piece, the center pin sets up inside wheel hub, and a plurality of blade circumference set up in the surface of wheel hub's lateral wall, the first end and the center pin fixed connection of connecting piece, the second end pass wheel hub's lateral wall to with blade fixed connection. According to the fan blade assembly and the fan, the unique connecting piece setting mode is adopted, the rigidity can be increased, the blade root is not prone to fracture, and the problem that the blade root is prone to fracture when falling as a stress concentration part is solved.

Description

Fan blade assembly and fan with same

Technical Field

The application belongs to the technical field of fans, and particularly relates to a fan blade assembly and a fan with the same.

Background

At present, the alternating current fan in the prior art adopts three or five blades, and is characterized by low power and low cost. However, since the root of the blade is a stress concentration site, it is likely to break when dropped.

Therefore, how to provide a fan blade assembly capable of increasing the rigidity of the blade root so that the blade assembly is not easy to break when falling and a fan with the fan blade assembly become a technical problem which needs to be solved urgently by a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a fan blade subassembly and have its fan, can effectually increase blade root rigidity for it is difficult for the fracture when falling.

In order to solve the above problem, the present application provides a fan blade assembly, including:

a hub;

a central shaft disposed inside the hub;

a plurality of blades circumferentially disposed on an outer surface of a sidewall of the hub;

and the first end of the connecting piece is fixedly connected with the central shaft, and the second end of the connecting piece penetrates through the side wall of the hub and is fixedly connected with the blade.

Preferably, the hub is cylindrical, and the hub is connected with the central shaft through the connecting piece.

Preferably, the connecting piece is a plurality of, a plurality of connecting pieces around the central axis circumference set up in the wheel hub.

Preferably, the connecting pieces comprise a first connecting piece and a second connecting piece which are arranged at different axial positions; the first connecting pieces and the second connecting pieces are arranged in a staggered mode in the circumferential direction.

Preferably, the connector is a reinforcing bar.

Preferably, the cross-section of the blade is a wing profile.

Preferably, the ratio H/L of the chord length L to the maximum curvature H of the blade section is 5% -10%.

Preferably, the blade has a blade height a of 15-20 mm.

Preferably, the fan blade assembly is made of AS plastic.

According to another aspect of the present application, a fan is provided, which includes a fan blade assembly as described above.

The application provides a fan blade subassembly adopts unique connecting piece setting mode, can increase rigidity for the difficult fracture of blade root has solved blade root as stress concentration department, easy cracked problem when falling.

Drawings

Fig. 1 is a schematic perspective view of a fan blade assembly according to an embodiment of the present application;

FIG. 2 is a front view of a fan blade assembly according to an embodiment of the present application;

fig. 3 is a left side view of a fan blade assembly according to an embodiment of the present application;

FIG. 4 is a schematic structural view of a blade according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional structural view of a blade according to an embodiment of the present application;

fig. 6 is a schematic view of a prior art blade structure.

The reference numerals are represented as:

1. a hub; 2. a central shaft; 3. a blade; 4. a connecting member; 41. a first connecting member; 42. a second connecting member.

Detailed Description

Referring to fig. 1-3 in combination, according to an embodiment of the present application, a fan blade assembly includes: hub 1, central shaft 2 and blades 3 and connectors 4; the central shaft 2 is arranged inside the hub 1; a plurality of blades 3 are circumferentially arranged on the outer surface of the side wall of the hub 1; the first end and the 2 fixed connection of center pin of connecting piece 4, the second end passes the lateral wall of wheel hub 1 to with 3 fixed connection of blade, can increase rigidity, make the difficult fracture of blade root, solved 3 roots of blade as stress concentration department, easy cracked problem when falling.

Furthermore, the hub 1 is cylindrical, the hub 1 is connected with the central shaft 2 through the connecting piece 4, the hub 1 is of a hollow structure, and the hollow part reduces the material consumption of the fan blade, the product cost and the material cost; the hollow structure can also directly eliminate the low work area at the hollow position, reduce the power of the motor and reduce the cost of the motor.

Further, the connecting member 4 is plural, and the plural connecting members 4 are circumferentially provided in the hub 1 around the center shaft 2.

Referring to fig. 2 in combination, the present application also discloses embodiments in which the connecting member 4 comprises a first connecting member 41 and a second connecting member 42 arranged at different axial positions; the first connecting pieces 41 and the second connecting pieces 42 are circumferentially staggered, so that the rigidity can be effectively increased, and the root of the blade 3 is firmer and is not easy to break.

Further, the connecting member 4 is a reinforcing rib.

Referring to fig. 4 in combination, the present application further discloses some embodiments, the cross section of the blade 3 is a wing shape, which can effectively improve the work efficiency of the blade assembly, greatly improve the air volume and the energy efficiency, improve the high-grade rotation noise, and effectively reduce the noise.

With combined reference to fig. 5, embodiments are also disclosed, which are characterized in that the ratio H/L of the chord length L to the maximum curvature H of the blade 3 cross-section is 5-10%.

Further, the blade height a of the blade 3 is 15-20 mm.

Further, the number of the blades 3 is 3 to 13.

Furthermore, 7 blades 3 are distributed in the high work-doing area of the blades, the air quantity can be increased by properly increasing the number of the blades, and when the number of the blades 3 is 7, the comprehensive performance of the fan blade assembly is the best.

Furthermore, the fan blade assembly is made of plastic.

Furthermore, the fan blade component is made of AS plastic, so that the fan blade can be prevented from deforming under the condition of long-term operation, the problem of air quantity attenuation is solved, and the material cost is low. Research shows that compared with a fan in the prior art, the air quantity of the hollow fan blade can be increased by 15%, the energy efficiency is improved by more than 20%, high-grade rotation noise can be improved, and the noise is reduced by 2 dB.

According to an embodiment of the present application, a fan includes a blade assembly, and the blade assembly is the above-mentioned blade assembly.

In order to determine the effect of the present application, the present application sets the following comparative example 1 to be compared with the fan blade assembly of the present application.

Comparative example 1

As shown in fig. 6, the blade assembly of comparative example 1 employs the prior art blades, the number of which is 5, and does not employ a hollow structure.

Performance testing

Carry out the test of amount of wind, efficiency and noise among the blade and the prior art to this application. The specific test methods and results are shown in tables 1-2 below:

table 1 test conditions and test results of fan blade assembly of the present application

Table 2 test conditions and test results of the fan blade assembly in comparative example 1

Table 3 comparison of the results of the blade assembly of the present application and the blade assembly of comparative example 1

As can be seen from tables 1-3, compared with the fan blade assembly in the prior art, the fan blade assembly has the advantages of remarkably increased air volume, improved energy efficiency, reduced noise and reduced power.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (10)

1. A fan blade assembly, comprising:

a hub (1);

a central shaft (2), said central shaft (2) being arranged inside said hub (1);

the blades (3) are circumferentially arranged on the outer surface of the side wall of the hub (1);

the first end of the connecting piece (4) is fixedly connected with the central shaft (2), and the second end of the connecting piece (4) penetrates through the side wall of the hub (1) and is fixedly connected with the blade (3).

2. The fan blade assembly according to claim 1, wherein the hub (1) is cylindrical, and the hub (1) is connected with the central shaft (2) through the connecting piece (4).

3. The fan blade assembly according to claim 1, wherein the connecting piece (4) is a plurality of connecting pieces, and the connecting pieces (4) are circumferentially arranged in the hub (1) around the central shaft (2).

4. A fan blade assembly according to claim 3, wherein the connecting piece (4) comprises a first connecting piece (41) and a second connecting piece (42) which are arranged at different axial positions; the first connecting pieces (41) and the second connecting pieces (42) are circumferentially staggered.

5. The fan blade assembly according to claim 4, wherein the connecting piece (4) is a reinforcing rib.

6. The fan blade assembly according to claim 1, wherein the cross section of the blade (3) is a wing type.

7. The fan blade assembly according to claim 6, wherein the ratio H/L of the chord length L to the maximum curvature H of the cross section of the fan blade (3) is 5-10%.

8. The fan blade assembly according to claim 7, wherein the height a of the fan blade (3) is 15-20 mm.

9. The fan blade assembly of claim 1, wherein the fan blade assembly is made of AS plastic.

10. A fan comprising a blade assembly, wherein the blade assembly is as claimed in any one of claims 1 to 9.

Images