CN112253538A

CN112253538A - Axial flow wind wheel structure and axial flow fan

Info

Publication number: CN112253538A
Application number: CN202011092194.4A
Authority: CN
Inventors: 程守炤; 王垚琦; 叶涛; 覃万翔
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-01-22

Abstract

The invention discloses an axial flow wind wheel structure, which comprises blades, wherein each blade comprises a blade top, a front edge, a rear edge, a suction surface and a pressure surface; still include perpendicular winglet, perpendicular winglet sets up in the blade top, and perpendicular winglet is perpendicular with the wind wheel rotation plane, and the thickness delta of perpendicular winglet satisfies: delta is more than or equal to 1.5mm and less than or equal to 3.5 mm; the vertical winglets on the blade tops block the radial flow of the blade-side airflow, so that the flow loss of the main airflow is reduced, and the effect of improving the static pressure efficiency of the fan blades is achieved; meanwhile, the pressure gradient from the pressure surface to the suction surface of the blade tip can be reduced, the generation and development of blade tip leakage vortex and blade tip separation vortex are inhibited, and the aerodynamic noise of the axial flow fan is reduced.

Description

Axial flow wind wheel structure and axial flow fan

Technical Field

The invention relates to the technical field of axial flow fans, in particular to an axial flow fan wheel structure and an axial flow fan.

Background

The blade is rotated, the airflow is radially flowed, thereby increasing the flow loss of the main airflow, and the axial flow fan is pneumatically noisy, increasing the noise of the use environment, so that the above technical problems need to be improved.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an axial flow wind wheel structure which can reduce the flow loss of the main air flow and reduce the aerodynamic noise of an axial flow fan.

The invention also provides an axial flow fan with the axial flow wind wheel structure.

An axial flow wind wheel structure according to an embodiment of a first aspect of the present invention includes a blade including a tip, a leading edge, a trailing edge, a suction surface, a pressure surface; the vertical winglet is arranged on the blade top and is vertical to the rotation plane of the wind wheel, and the thickness delta of the vertical winglet satisfies the following conditions: delta is more than or equal to 1.5mm and less than or equal to 3.5 mm.

The axial flow wind wheel structure provided by the embodiment of the invention at least has the following beneficial effects:

the vertical winglets on the blade tops block the radial flow of the blade-side airflow, so that the flow loss of the main airflow is reduced, and the effect of improving the static pressure efficiency of the fan blades is achieved; meanwhile, the pressure gradient from the pressure surface to the suction surface of the blade tip can be reduced, the generation and development of blade tip leakage vortex and blade tip separation vortex are inhibited, and the aerodynamic noise of the axial flow fan is reduced.

According to some embodiments of the invention the vertical winglet is located to one side of the suction surface.

According to some embodiments of the invention, the vertical winglets are arranged on the pressure surface and the suction surface respectively, and the two vertical winglets are symmetrical to each other.

According to some embodiments of the invention, the vertical winglets extend from the leading edge to the trailing edge, the vertical winglets having a height H that increases uniformly, the vertical winglets having a height H1 at the leading edge, H1 satisfying: h1 ═ 0.

According to some embodiments of the invention the vertical winglet extends from a starting point located between the leading edge and the trailing edge and ending at the trailing edge.

According to some embodiments of the invention, the vertical winglet has a height H2 at the trailing edge, H2 satisfies: h2 is more than or equal to 0.02D and less than or equal to 0.05D, and D is the diameter of the wind wheel.

According to some embodiments of the invention, the vertical winglet has a length equal to or greater than one quarter of the length of the tip.

An axial flow fan according to an embodiment of a second aspect of the present invention includes an axial flow fan wheel structure described above.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a schematic top view of an embodiment of the present invention;

FIG. 3 is a schematic side view of an embodiment of the present invention.

A blade 100, a blade tip 101, a leading edge 102, a trailing edge 103, a suction side 104, a pressure side 105; a vertical winglet 200.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Referring to fig. 1 to 3, an axial flow wind wheel structure includes a blade 100, the blade 100 including a blade tip 101, a leading edge 102, a trailing edge 103, a suction surface 104, and a pressure surface 105; the vertical winglet 200 is arranged on the blade top 101, the vertical winglet 200 is vertical to the rotation plane of a wind wheel, and the thickness delta of the vertical winglet 200 satisfies the following requirements: delta is more than or equal to 1.5mm and less than or equal to 3.5 mm.

The vertical winglet 200 on the blade top 101 blocks the radial flow of the blade edge airflow, so that the flow loss of the main airflow is reduced, and the effect of improving the static pressure efficiency of the fan blade is achieved; meanwhile, the pressure gradient from the tip pressure surface 105 to the suction surface 104 can be reduced, the generation and development of tip leakage vortex and tip separation vortex are inhibited, and the aerodynamic noise of the axial flow fan is reduced.

The position of the vertical winglet 200 on the blade 100 may be achieved in two ways:

the first method is as follows: the vertical winglet 200 is located on the suction surface 104 side.

The second method comprises the following steps: the pressure surface 105 and the suction surface 104 are respectively provided with vertical winglets 200, and the two vertical winglets 200 are symmetrical to each other.

The vertical winglet 200 gradually extends over the tip 101, while the height H of the vertical winglet 200 increases uniformly, wherein:

the first method is as follows: the vertical winglet 200 extends from the leading edge 102 to the trailing edge 103, the vertical winglet 200 having a height H1 at the leading edge 102, H1 satisfying: h1 is 0, the height of the vertical winglet 200 at the trailing edge 103 is H2, and H2 satisfies: h2 is more than or equal to 0.02D and less than or equal to 0.05D, and D is the diameter of the wind wheel.

The second method comprises the following steps: the vertical winglet 200 extends from a starting point between the leading edge 102 and the trailing edge 103 and ends at the trailing edge 103, the vertical winglet 200 has a height H2 at the trailing edge 103, H2 satisfies: h2 is more than or equal to 0.02D and less than or equal to 0.05D, and D is the diameter of the wind wheel.

The vertical winglet 200 has a length equal to or greater than one-fourth the length of the tip 101.

An axial flow fan comprises the axial flow wind wheel structure.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. An axial flow wind wheel structure comprises a blade (100), wherein the blade (100) comprises a blade top (101), a front edge (102), a rear edge (103), a suction surface (104) and a pressure surface (105); characterized in that, still include vertical winglet (200), vertical winglet (200) sets up on the blade top (101), vertical winglet (200) is perpendicular with the wind wheel plane of rotation, the thickness delta of vertical winglet (200) satisfies: delta is more than or equal to 1.5mm and less than or equal to 3.5 mm.

2. An axial flow wind wheel structure according to claim 1, characterised in that the vertical winglet (200) is located on the suction surface (104) side.

3. The axial flow wind wheel structure according to claim 1, characterized in that the vertical winglets (200) are respectively arranged on the pressure surface (105) and the suction surface (104), and the two vertical winglets (200) are symmetrical to each other.

4. The axial flow wind wheel structure of claim 1, wherein the vertical winglet (200) extends from the leading edge (102) to the trailing edge (103), the vertical winglet (200) having a height H that increases uniformly, the vertical winglet (200) having a height H1 at the leading edge (102), H1 satisfying: h1 ═ 0.

5. An axial flow wind wheel structure according to claim 1, characterized in that the vertical winglet (200) extends from a position between the leading edge (102) and the trailing edge (103) and ends in the trailing edge (103), the vertical winglet (200) having a height H that increases uniformly.

6. The axial flow wind wheel structure according to claim 4 or 5, characterized in that the height of the vertical winglet (200) at the trailing edge (103) is H2, H2 satisfying: h2 is more than or equal to 0.02D and less than or equal to 0.05D, and D is the diameter of the wind wheel.

7. An axial flow wind wheel structure according to claim 1, characterised in that the length of the vertical winglet (200) is equal to or greater than one quarter of the length of the tip (101).

8. An axial fan comprising an axial fan wheel structure according to any one of claims 1 to 7.