CN218717698U

CN218717698U - Axial flow wind wheel with gradually changed outer diameter and axial flow fan

Info

Publication number: CN218717698U
Application number: CN202222791334.8U
Authority: CN
Inventors: 叶涛; 韦宏茂; 覃万翔; 梁炜亮
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-03-24
Anticipated expiration: 2032-10-21

Abstract

The utility model discloses an external diameter gradual change axial compressor wind wheel and axial fan, external diameter gradual change axial compressor wind wheel includes: a hub; the blades are fixedly connected to the outer peripheral wall of the hub, and a plurality of blades are distributed circumferentially around the axis of the hub; on a projection plane perpendicular to the axis of the hub, the blade comprises a front edge, a rear edge and an outer edge, the outer edge comprises a first line and a second line, one end of the first line is connected with one end of the front edge to form a blade tip, the other end of the first line is connected with one end of the second line, the other end of the second line is connected with one end of the rear edge to form a blade tail, the second line is located on a first circle, and the first line is gradually and radially close to the center of the hub along the extension direction close to the blade tip; the outer diameter of the wind wheel at the blade tip is smaller than the maximum outer diameter of the wind wheel, and a gap required by deformation is reserved at the blade tip of the blade, so that collision and friction between the blade and the guide ring are avoided.

Description

Axial flow wind wheel with gradually changed outer diameter and axial flow fan

Technical Field

The utility model relates to an axial fan technical field especially relates to an external diameter gradual change axial fan and axial fan.

Background

The air conditioner is generally divided into an outdoor unit and an indoor unit, an axial flow fan is needed in the outdoor unit to supply air and dissipate heat, an axial flow wind wheel is surrounded by a guide ring, a safety gap exists between the axial flow wind wheel and the guide ring, and when the axial flow wind wheel runs at a high speed, blades can deform radially under the action of centrifugal force, so that the gap between the axial flow wind wheel and the guide ring is reduced, and even the axial flow fan blades and the guide ring can collide and rub.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model provides an external diameter gradual change axial fan wheel and axial fan, the external diameter that is located the leaf point department of wind wheel is less than the biggest external diameter of wind wheel, ensures that the wind wheel in the operation, and the leaf point can not scrape the guide ring after taking place to warp, has guaranteed the safe operation of fan.

In a first aspect, the embodiment of the utility model provides an external diameter gradual change axial flow wind wheel, external diameter gradual change axial flow wind wheel includes:

a hub;

the blades are fixedly connected to the outer peripheral wall of the hub, and a plurality of blades are distributed circumferentially around the axis of the hub;

on the perpendicular to on the plane of projection of wheel hub's axis, the blade includes leading edge, trailing edge and outer fringe, the outer fringe projection includes first line and second line, first linear one end with the one end of leading edge is connected in order to form the apex, first linear other end with the one end of second line is connected, the other end of second line with the one end of trailing edge is connected in order to form the leaf tail, the second line is located first circle, first circle with wheel hub sets up with the heart is concentric, first line is along being close to gradually radially being close to in the extending direction of apex the center of wheel hub.

According to the utility model discloses external diameter gradual change axial compressor wind wheel has following technological effect at least: because the strength of the wind wheel at the blade tip is poor, when the blade deforms, the deformation of the blade tip of the blade is large, the first line gradually and radially approaches the center of the hub along the extending direction close to the blade tip, the outer diameter of the wind wheel at the blade tip is smaller than the maximum outer diameter of the wind wheel, a gap required by deformation is reserved at the blade tip of the blade, and therefore collision and friction between the blade and the guide ring are avoided.

According to the utility model discloses a some embodiments, the diameter of first circle is D, the apex with the radial distance of wheel hub's axis is R, satisfies: D-2R is more than or equal to 0.02D and less than or equal to 0.03D.

According to some embodiments of the present invention, the wrap angle of the outer edge is θ 1, the wrap angle of the first line is θ 2, satisfying:

according to some embodiments of the utility model, the blade includes convex surface and concave surface, the convex surface is equipped with first strengthening rib, first strengthening rib with wheel hub's periphery wall fixed connection, first strengthening rib is located and is close to one side of leading edge.

According to the utility model discloses a some embodiments, wheel hub's upper surface undercut forms the recess, the middle part of recess is equipped with axle sleeve portion, the middle part of axle sleeve portion is equipped with the connecting hole.

According to the utility model discloses a some embodiments, the bottom of recess is equipped with a plurality of second strengthening ribs, the second strengthening rib is followed the axis circumference of axle sleeve portion distributes, the one end of second strengthening rib with the interior cell wall fixed connection of recess, the other end of second strengthening rib with the periphery wall fixed connection of axle sleeve portion.

In a second aspect, the embodiment of the present invention further provides an axial flow fan, including according to the present invention, the above-mentioned first aspect embodiment of the present invention provides an axial flow wind wheel with gradually changed outer diameter.

According to the utility model discloses axial fan has following technological effect at least: this axial fan adopts external diameter gradual change axial fan, because the intensity that the wind wheel is located the apex department is relatively poor, so when the blade takes place to warp, the deflection of the apex department of blade is great, and first line is radially close to in the extending direction who is close to the apex gradually in the center of wheel hub, makes the external diameter that is located the apex department of blade of wind wheel be less than the maximum external diameter of wind wheel, then has reserved the required clearance that warp to the apex department of blade to avoid blade and guide ring to take place the collision friction.

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 schematic structural view of an axial-flow wind wheel with gradually-changed outer diameter according to some embodiments of the present invention;

fig. 2 is a schematic structural view of an axial flow wind wheel with gradually changed outer diameter according to some embodiments of the present invention at another angle;

fig. 3 is a schematic view of an axial flow wind wheel with gradually changing outer diameter according to some embodiments of the present invention.

Reference numerals:

hub 100, blade 110, leading edge 111, trailing edge 112, outer edge 113, first line 121, second line 122, blade tip 131, blade tail 132, first circle 140, convex surface 151, concave surface 152, first strengthening rib 160, groove 170, boss portion 181, connecting hole 182, second strengthening rib 190.

Detailed Description

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

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper and lower directions, is the orientation or positional relationship shown on the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The embodiments of the present invention will be further explained with reference to the drawings.

According to some embodiments of the present invention, referring to fig. 1 and 2, the outer diameter gradual axial flow wind wheel comprises a hub 100 and four blades 110; the blades 110 are fixedly connected to the outer peripheral wall of the hub 100, and four blades 110 are circumferentially distributed around the axis of the hub 100; referring to fig. 3, on a projection plane perpendicular to an axis of hub 100, blade 110 includes a leading edge 111, a trailing edge 112 and an outer edge 113, both ends of leading edge 111 are connected to outer edge 113 and hub 100, respectively, both ends of trailing edge 112 are connected to outer edge 113 and hub 100, respectively, outer edge 113 includes a first line 121 and a second line 122; one end of the first line 121 is connected to one end of the leading edge 111 at a connection point a, a being the tip 131 of the blade 110; the other end of the first line 121 is connected with one end of the second line 122, and the connection point is B; the other end of the second line 122 is connected to one end of the trailing edge 112, the connection point is C, C is the blade tail 132 of the blade 110, the second line 122 is located on the first circle 140, the first circle 140 is concentrically arranged with the hub 100, that is, the center of the first circle 140 coincides with the center of the hub 100, the center point of the hub 100 is point O, the first line 121 is gradually radially close to the center of the hub 100 along the extending direction close to the blade tip 131, that is, the first line 121 gradually shortens the radial distance from the point B to the point a from the point O.

It can be understood that the wind wheel is surrounded by the guide ring, a gap exists between the guide ring and the wind wheel, because the strength of the wind wheel at the blade tip 131 is the maximum, when the wind wheel rotates at high speed, the blade 110 deforms, the outer edge 113 of the blade 110 radially moves away from the point O under the action of centrifugal force, so that the distance between the blade 110 and the guide ring is shortened, while the deformation amount at the blade tip 131 is the maximum, that is, the deformation amount of the blade tip 131 radially moving away from the point O is the maximum, and the deformation of the blade tip 131 may cause the blade tip 131 to collide with the guide ring to damage the wind wheel; in this embodiment, the first line 121 gradually and radially approaches to the center of the hub 100 along the extending direction near the blade tip 131, so that the outer diameter of the wind wheel at the blade tip 131 is smaller than the maximum outer diameter of the wind wheel, a space required for deformation is reserved at the blade tip 131 of the blade 110, and collision and friction between the blade 110 and a guide ring surrounding the wind wheel due to too large deformation of the blade 110 is avoided.

According to some embodiments of the present invention, referring to fig. 3, the diameter of the first circle 140 is D, the radial distance of the blade tip 131 from the axis of the hub 100 is R, satisfying: D-2R is more than or equal to 0.02D and less than or equal to 0.03D. The large enough clearance for reserved deformation between the blade tip 131 and the first circle 140 is ensured, and meanwhile, the working efficiency of the wind wheel is prevented from being influenced due to the large clearance between the blade tip 131 and the first circle 140.

According to some embodiments of the present invention, referring to fig. 3, the connection point of the first line 121 and the leading edge 111 is a, a being the tip 131 of the blade 110; the connection point of the first line 121 and the second line 122 is B; the second line 122 is connected to the trailing edge 112 at a point C,c is a blade tail 132 of the blade 110, the second line 122 is located on a first circle 140, the first circle 140 is concentrically arranged with the hub 100, a central point of the hub 100 is a point O, a wrap angle of the outer edge 113 is θ 1, that is, < AOC is θ 1, a wrap angle of the first line 121 is θ 2, that is, < AOB is θ 2, and the following conditions are satisfied:

it will be appreciated that the closer the trailing edge 112 of the blade 110 to the blade tip 131 is, the greater the amount of deformation during high speed rotation is, when this is satisfied

It is ensured that the side of the rear edge 112 of the blade 110 close to the blade tip 131 is long enough, that is, the first line 121 is long enough, so that a deformation gap, that is, a gap between the first line 121 and the first circle 140, is reserved at the rear edge 112 of the part of the blade 110 corresponding to the first line 121, and meanwhile, the first line 121 is prevented from being too long, so as to influence the working area of the blade 110. />

According to some embodiments of the present invention, referring to fig. 1 and 2, the upper side of the blade 110 is a concave surface 152, the lower side of the blade 110 is a convex surface 151, the convex surface 151 is provided with a first reinforcing rib 160, the first reinforcing rib 160 is fixedly connected with the outer peripheral wall of the hub 100, the first reinforcing rib 160 is located at one side close to the front edge 111 of the blade 110, and the first reinforcing rib 160 is used for enhancing the connection stability of the blade 110 and the hub 100.

According to some embodiments of the utility model, referring to fig. 1, the upper surface undercut of wheel hub 100 forms recess 170, and the middle part of recess 170 is equipped with axle sleeve portion 181, and the middle part of axle sleeve portion 181 is equipped with connecting hole 182, and connecting hole 182 is used for being connected with the motor shaft of motor, and setting up of recess 170 can alleviate wheel hub 100's weight and material saving cost.

According to some embodiments of the utility model, referring to fig. 1, the bottom of recess 170 is equipped with a plurality of second strengthening ribs 190, and second strengthening rib 190 distributes along the axis circumference of axle sleeve portion 181, the one end of second strengthening rib 190 and the interior cell wall fixed connection of recess 170, the other end of second strengthening rib 190 and the periphery wall fixed connection of axle sleeve portion 181, and second strengthening rib 190 is used for strengthening the stability of being connected of axle sleeve portion 181 and recess 170.

In the description herein, references to the description of "some embodiments" mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides an external diameter gradual change axial fan, is applied to axial fan, its characterized in that includes:

a hub (100);

the blades (110) are fixedly connected to the outer peripheral wall of the hub (100), and a plurality of blades (110) are distributed circumferentially around the axis of the hub (100);

on a projection plane perpendicular to the axis of the hub (100), the blade (110) comprises a front edge (111), a rear edge (112) and an outer edge (113), the outer edge (113) projection comprises a first line (121) and a second line (122), one end of the first line (121) is connected with one end of the front edge (111) to form a blade tip (131), the other end of the first line (121) is connected with one end of the second line (122), the other end of the second line (122) is connected with one end of the rear edge (112) to form a blade tail (132), the second line (122) is located on a first circle (140), the first circle (140) is concentrically arranged with the hub (100), and the first line (121) is gradually radially close to the center of the hub (100) along the extension direction close to the blade tip (131).

2. -outer diameter graded axial wind rotor according to claim 1, characterized in that the diameter of the first circle (140) is D and the radial distance of the blade tip (131) from the axis of the hub (100) is R, satisfying: D-2R is more than or equal to 0.02D and less than or equal to 0.03D.

3. The axial-flow wind wheel with gradually changed outer diameter according to claim 1, wherein the wrap angle of the outer edge (113) is θ 1, and the wrap angle of the first line (121) is θ 2, so as to satisfy the following conditions:

4. the axial-flow wind wheel with gradually changed outer diameter according to claim 1, wherein the blades (110) comprise a convex surface (151) and a concave surface (152), the convex surface (151) is provided with a first reinforcing rib (160), the first reinforcing rib (160) is fixedly connected with the outer peripheral wall of the hub (100), and the first reinforcing rib (160) is positioned at one side close to the front edge (111).

5. The axial-flow wind wheel with gradually changed outer diameter according to claim 1, wherein the upper surface of the hub (100) is recessed downwards to form a groove (170), a shaft sleeve part (181) is arranged in the middle of the groove (170), and a connecting hole (182) is arranged in the middle of the shaft sleeve part (181).

6. The axial-flow wind wheel with gradually changed outer diameter according to claim 5, wherein a plurality of second reinforcing ribs (190) are arranged at the bottom of the groove (170), the second reinforcing ribs (190) are circumferentially distributed along the axis of the shaft sleeve portion (181), one end of each second reinforcing rib (190) is fixedly connected with the inner groove wall of the groove (170), and the other end of each second reinforcing rib (190) is fixedly connected with the outer circumferential wall of the shaft sleeve portion (181).

7. An axial flow fan, characterized in that it comprises an outer diameter gradual change axial flow wind wheel according to any of claims 1 to 6.