Noise reduction type axial flow fan impeller assembly

Abstract

The utility model relates to the technical field of axial flow fans, in particular to a noise reduction type axial flow fan impeller assembly which comprises a hub and an annularly-arranged housing, the hub and the housing are directly connected through fan blades, the edge, located at one end of an air inlet, of the housing is bent outwards to form a turned edge, and a noise reduction groove is formed in the outer side of the turned edge. According to the utility model, the turnup structure is adopted at the inlet of the axial flow fan, so that the impact of gas backflow is reduced, and the aerodynamic noise of the axial flow fan is reduced. And meanwhile, the hub adopts a spherical structure, so that the air inlet impact loss is smaller, and the noise of the fan is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow fans, in particular to a noise reduction type axial flow fan impeller assembly. Background Art

[0002] Axial flow fans are fans whose airflow direction is in the same direction as the axis of the fan blades, such as electric fans and air conditioner outdoor fans. They are called "axial flow" because the air flows parallel to the fan axis.

[0003] At present, axial flow fans are more and more widely used in the refrigeration industry, especially in condensers. However, people have more and more stringent requirements on the noise of fans, and the existing axial flow fans still need to be improved in terms of noise. Therefore, we propose a noise-reducing axial flow fan impeller assembly to solve the above problem. Utility Model Content

[0004] The utility model aims to solve the defect of the axial flow fan in the prior art that the axial flow fan has a large noise during operation, and proposes a noise-reducing axial flow fan impeller assembly.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A noise-reducing axial flow fan impeller assembly comprises a hub and a ring-shaped cover shell, wherein the hub and the cover shell are directly connected through fan blades, and the cover shell is bent outward at an edge at one end of an air inlet to form a flange, and a noise-reducing groove is arranged on the outer side of the flange.

[0007] As a preferred technical solution of the utility model, the end of the hub close to the flange is spherical, and the spherical structure is adopted to reduce the air intake impact loss and reduce the noise of the fan.

[0008] As a preferred technical solution of the utility model, the number of the noise reduction grooves is five to ten, and all the noise reduction grooves are distributed in a ring shape on the cover, and the aerodynamic noise is further reduced by the noise reduction grooves.

[0009] As a preferred technical solution of the utility model, arc connecting surfaces are provided at the connection points of the hub, the fan blades and the cover shell to reduce wind resistance and facilitate the flow of gas.

[0010] The beneficial effects of the utility model are:

[0011] The novel design adopts a flange structure at the inlet of the axial flow fan to reduce the impact of gas backflow, thereby reducing the aerodynamic noise of the axial flow fan. At the same time, the hub adopts a spherical structure to reduce the impact loss of air intake and reduce the noise of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a noise-reducing axial flow fan impeller assembly proposed by the utility model;

[0013] Figure 2 for Figure 1 The structural diagram at A in the middle;

[0014] Figure 3 The utility model is a schematic structural diagram of a cross-section of a noise-reducing axial flow fan impeller assembly.

[0015] In the figure: 1. wheel hub; 2. cover shell; 21. flange; 22. noise reduction groove; 3. fan blade. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] Reference Figure 1-3 A noise reduction type axial flow fan impeller assembly comprises a hub 1 and a ring-shaped cover 2, wherein the hub 1 and the cover 2 are directly connected through blades 3, wherein the number of blades 3 is five and the blades 3 are evenly distributed around the center of the cover 2, and at the same time, arc connection surfaces are arranged at the connection points of the hub 1, the blades 3 and the cover 2 to reduce wind resistance and facilitate the flow of gas;

[0018] The edge of the cover 2 at one end of the air inlet is bent outward to form a flange 21, and a noise reduction groove 22 is provided on the outer side of the flange 21. The number of the noise reduction grooves 22 is five to ten, and all the noise reduction grooves 22 are distributed in a ring shape on the cover 2, and the aerodynamic noise is further reduced by the noise reduction grooves 22;

[0019] Secondly, the end of the hub 1 close to the flange 21 is spherical. The spherical structure reduces the air intake impact loss and reduces the noise of the fan. At the same time, a mounting hole is opened in the middle of the hub 1, and an arrow indicating the direction of rotation is also provided on the outer surface of the hub 1.

[0020] In this embodiment: During the operation of the device, the flange 21 structure is adopted at the inlet of the axial flow fan to reduce the impact of gas backflow, thereby reducing the aerodynamic noise of the axial flow fan. At the same time, the noise is further reduced by the noise reduction groove 22. In addition, the hub 1 adopts a spherical structure to reduce the intake impact loss and reduce the noise of the fan.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A noise-reducing axial flow fan impeller assembly, comprising a hub (1) and a casing (2) arranged in an annular shape, wherein the hub (1) and the casing (2) are directly connected via a fan blade (3), characterized in that: The edge of the cover shell (2) at one end of the air inlet is bent outward to form a flange (21), and a noise reduction groove (22) is provided on the outer side of the flange (21).

2. A noise reduction type axial flow fan impeller assembly according to claim 1, characterized in that: One end of the hub (1) close to the flange (21) is spherical.

3. The noise reduction type axial flow fan impeller assembly according to claim 1, characterized in that: The number of the noise reduction grooves (22) is five to ten, and all the noise reduction grooves (22) are distributed in a ring shape on the cover shell (2).

4. The noise reduction type axial flow fan impeller assembly according to claim 1, characterized in that: Arc connection surfaces are provided at the connection points between the hub (1), the fan blades (3) and the cover shell (2).

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