CN108591119B

CN108591119B - Impeller of axial flow fan

Info

Publication number: CN108591119B
Application number: CN201810183988.8A
Authority: CN
Inventors: 王书勤; 李华; 杨坚; 陈志英
Original assignee: Changzhou Xiangming Intelligent Power Co ltd
Current assignee: Changzhou Xiangming Intelligent Power Co ltd
Priority date: 2018-03-07
Filing date: 2018-03-07
Publication date: 2024-06-18
Anticipated expiration: 2038-03-07
Also published as: CN108591119A

Abstract

The invention relates to an axial flow fan impeller, which is provided with a hub; a plurality of blades are circumferentially distributed on the hub along the rotation axis; one side of the blade is a front edge, and the other side is a rear edge; the front edge of the blade is provided with a turbulator integrated with the blade; the turbulator comprises a plurality of protrusions arranged along the extension direction of the leading edge; the arrangement of the protrusions forms a wave shape. The invention has good overall aerodynamic performance and low noise. Through the notch setting on the swivel ring, the dust deposit dead angle has been eliminated, greatly reduced the maintenance frequency of fan, and the fan that this impeller was made has good using value in vehicle air conditioner, vehicle cooling system.

Description

Impeller of axial flow fan

Technical Field

The present invention relates to an axial flow fan impeller.

Background

An axial flow fan is a device that rotates an impeller to flow gas parallel to the axial flow of the fan. Axial fans are commonly used in applications where flow requirements are high and pressure requirements are low. The axial flow fan has very wide application, such as electric fan, air conditioner fan, automobile axial flow fan, etc. The axial flow fan mainly comprises an impeller and a shell, has a simple structure and has very high index requirements.

As a core component impeller of the axial flow fan, the impeller has good aerodynamic performance and noise index, which are key to determining the performance of the axial flow fan. The pneumatic performance and noise of the impeller can be directly influenced by the arrangement of the blades on the impeller, the shapes of the blades, the angles of the blades and other designs.

Meanwhile, in order to ensure the performance of some impellers for axial flow fans, a rotating ring is added to the top of each blade. The connection between the top of the blade and the rotating ring often forms a great amount of dust deposit with use, thereby affecting the performance of the axial flow fan. To solve the above problems, it is often necessary to remove the accumulated ash by maintenance. However, due to the existence of the dust deposition problem, the maintenance frequency of the axial flow fan is excessive, and the use efficiency is reduced.

Disclosure of Invention

The invention aims to provide an axial flow fan impeller which has good overall aerodynamic performance and low noise and can effectively reduce maintenance frequency.

The technical scheme for realizing the aim of the invention is as follows: the invention has a hub; a plurality of blades are circumferentially distributed on the hub along the rotation axis; one side of the blade is a front edge, and the other side is a rear edge; the front edge of the blade is provided with a turbulator integrated with the blade; the turbulator comprises a plurality of protrusions arranged along the extension direction of the leading edge; the arrangement of the protrusions forms a wave shape.

Simultaneously, the rotating ring is coaxial with the hub; the hub is connected with the root of the blade into a whole, and the top of the blade is connected with the rotating ring into a whole.

The turbulators extend from the blade root to the blade tip; the protrusion of the turbulator at the root of the blade is connected with the hub into a whole; the protrusions of the turbulators at the top of the vanes are integrally connected with the rotating ring.

Preferably, the turbulators are located on the protrusions of the blade top, naturally transition to the direction away from the front edge of the blade and gradually approaching the rotating ring, and form an extension part which is connected with the rotating ring into a whole and is higher than other protrusions.

As an optimized deformation, the above-mentioned projection includes a rising portion and a falling portion; the turbulators are arranged on the protrusions at the tops of the blades, and naturally transition to the rotating ring along the extending direction of the rising parts of the turbulators to form extending parts which are connected with the rotating ring into a whole and are higher than other protrusions.

The included angle between the tangent line of the blade top and the tangent line of the rotating ring is 10-30 degrees.

A notch is arranged at the intersection of the rotating ring and the pressure surface of the blade; the bottom surface of the notch extends along the pressure surface of the corresponding blade.

The bottom surface of the notch extends from an end of the extension away from the leading edge of the blade to the trailing edge of the blade.

The inner wall of the hub is circumferentially distributed with ribs for dissipating heat during rotation along the rotation axis.

The ribs are in a blade shape.

The invention has the positive effects that: (1) The invention greatly improves the overall aerodynamic performance by the turbulator, and has low noise;

(2) According to the invention, through the optimized design of the turbulator, the aerodynamic performance is further improved, and the noise is reduced;

(3) According to the invention, through the extension part of the turbulator, the aerodynamic performance is further improved, and the noise is reduced;

(4) According to the invention, through the notch on the rotating ring, the dust collection dead angle is eliminated, and the maintenance frequency of the fan is greatly reduced;

(5) The optimal design of the notch further eliminates the ash deposition dead angle;

(6) According to the invention, the radiating effect can be effectively increased through the ribs, and the stability and the service life of long-time work are ensured.

Drawings

In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a rear view of the present invention;

FIG. 4 is a graph of comparative air volume-air pressure test data for an impeller according to the present invention;

FIG. 5 is a graph of air volume versus efficiency test versus a prior art impeller of the present invention;

FIG. 6 is a graph of air volume versus noise test versus a prior art impeller of the present invention.

Detailed Description

Example one

Referring to fig. 1 to 3, the present invention has a hub 1 and a rotating ring 3 coaxially arranged; a plurality of blades 2 are circumferentially distributed between the hub 1 and the rotary ring 3 along the rotary axis; the hub 1 is connected with the blade root 22 into a whole, and the blade top 23 is connected with the rotating ring 3 into a whole; one side of the blade 2 is a front edge, and the other side is a rear edge; the front edge of the blade 2 is provided with a turbulator 21 integrated with the blade 2; the turbulator 21 comprises a plurality of protrusions arranged along the extension of the leading edge; the arrangement of the protrusions forms a wave shape.

The turbulators 21 extend from a blade root 22 to a blade tip 23; the protrusions of the turbulators 21 at the blade root 22 are integrally connected with the hub 1; the projections of turbulators 21 at the blade tips 23 are integrally connected to the rotating ring 3.

The bulge comprises a rising part and a falling part; the turbulators 21 are located in the projections of the blade tips 23 and naturally transition to the rotating ring 3 in the direction of extension of the rising portions thereof to form extensions 24 which are integrally connected with the rotating ring 3 above the other projections.

The angle between the tangent line of the blade top 23 and the tangent line of the rotating ring 3 is 10-30 degrees.

A notch 4 is arranged at the intersection of the rotary ring 3 and the pressure surface 25 of the blade 2; the bottom surface of the notch 4 extends along the pressure surface 25 of its corresponding blade 2 and from the end of the extension 24 remote from the leading edge of the blade 2 to the trailing edge of the blade 2.

The inner wall of the hub 1 is circumferentially distributed with ribs 5 for dissipating heat during rotation along the rotation axis.

The ribs 5 are in the shape of blades.

As shown in fig. 4 to 6, the present invention has more outstanding aerodynamic performance than the existing impeller and is low in noise.

Example two

The invention has a hub 1; a plurality of blades 2 are circumferentially distributed on the hub 1 along the rotation axis; one side of the blade 2 is a front edge, and the other side is a rear edge; the front edge of the blade 2 is provided with a turbulator 21 integrated with the blade 2; the turbulator 21 comprises a plurality of protrusions arranged along the extension of the leading edge; the arrangement of the protrusions forms a wave shape.

Ribs 5 for radiating heat during rotation are circumferentially distributed on the inner wall of the hub 1 along the rotation axis; the ribs 5 are in the shape of blades.

Example III

In the present invention, the turbulators 21 are located at the protrusions of the blade tip 23, naturally transition to the direction away from the front edge of the blade 2 and gradually approaching the rotating ring 3, and form an extension 24 integrally connected with the rotating ring 3 and higher than the other protrusions. Other technical features are the same as those of the first embodiment.

While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.

Claims

1. An axial flow fan impeller having a hub (1); a plurality of blades (2) are circumferentially distributed on the hub (1) along the rotation axis; the method is characterized in that: one side of the blade (2) is a front edge, and the other side is a rear edge; the front edge of the blade (2) is provided with a turbulator (21) which is integrated with the blade (2); the turbulator (21) comprises a plurality of protrusions arranged along the extension of the leading edge; the arrangement of the bulges forms a wave shape;

Also has a rotating ring (3) coaxial with the hub (1); the hub (1) is connected with the root (22) of the blade into a whole, and the top (23) of the blade is connected with the rotating ring (3) into a whole;

A notch (4) is arranged at the intersection of the rotating ring (3) and the pressure surface (25) of the blade (2); the bottom surface of the notch (4) extends along the pressure surface (25) of the corresponding blade (2);

The turbulators (21) extend from a blade root (22) to a blade tip (23); the protrusion of the turbulator (21) positioned at the root (22) of the blade is connected with the hub (1) into a whole; the protrusion of the turbulator (21) positioned at the blade top (23) is connected with the rotating ring (3) into a whole;

The bulge comprises a rising part and a falling part; the turbulators (21) are arranged on the protrusions of the blade tops (23), naturally transition to the rotating ring (3) along the extending direction of the rising parts of the turbulators to form extending parts (24) which are connected with the rotating ring (3) into a whole and are higher than other protrusions;

The bottom surface of the notch (4) extends from an end of the extension (24) away from the leading edge of the blade (2) to the trailing edge of the blade (2).

2. An axial flow fan impeller according to claim 1, wherein: the included angle between the tangent line of the blade top (23) and the tangent line of the rotating ring (3) is 10-30 degrees.

3. An axial flow fan impeller according to claim 1 or 2, characterized in that: the inner wall of the hub (1) is circumferentially distributed with ribs (5) for dissipating heat during rotation along the rotation axis.

4. An axial flow fan impeller according to claim 3, wherein: the ribs (5) are in a blade shape.