CN212454952U

CN212454952U - Axial flow fan blade

Info

Publication number: CN212454952U
Application number: CN202020906336.5U
Authority: CN
Inventors: 刘新怀; 王万宏; 蔡光智
Original assignee: Guangdong Langdi Gelinte Electrical Appliance Co ltd
Current assignee: Guangdong Langdi Gelinte Electrical Appliance Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-02-02
Anticipated expiration: 2030-05-26

Abstract

The utility model relates to an axial compressor fan blade technical field, concretely relates to axial compressor fan blade, axial compressor fan blade still includes a shaft sleeve inserts, the shaft sleeve inserts fixed connection is in the through-hole, and the center department of shaft sleeve inserts is equipped with the shaft hole that is used for wearing to establish the motor shaft, the shaft hole is on same axis with through-hole, the inside wall of the insertion end in shaft hole includes two linear sections that are not on same circumference at least; through addding the axle sleeve inserts, increase its inside structure of axle sleeve and improve the fan blade shaft hole fragile problem.

Description

Axial flow fan blade

Technical Field

The utility model relates to an axial compressor fan blade technical field, concretely relates to axial compressor fan blade.

Background

The axial flow fan blade has a very wide application in daily life, and the axial flow refers to airflow flowing in the same direction as the axis of the fan blade, such as an electric fan and an air conditioner external unit fan which are fans operating in an axial flow mode. The axial flow fan with the axial flow fan blades is usually used in occasions with higher flow requirements and lower pressure requirements, and is widely used in the field of air conditioners. The common axial flow fan blade mainly comprises a hub and a plurality of blades arranged on the peripheral side of the hub, although the structure is simple, the data parameter requirements of detailed structures of all positions of the axial flow fan blade are very high, the operation and noise control of the axial flow fan blade are greatly influenced, and in the related technology, the detailed design of the axial flow fan blade is continuously enhanced.

At present, most of axial flow fan blades are formed by plastic injection molding; particularly, the hub and the shaft sleeve are integrally formed by injection molding, although the production in such a way can reduce the cost and improve the production efficiency to a certain extent; however, still there is a certain significant problem because the shaft hole can be circumferentially positioned with the motor shaft, there is a section of D-shaped section (flat position drive) in the shaft hole, when the whole axial fan blade is too big in mass, under the condition of suddenly stopping rotation, the motor shaft has stopped, and the fan blade can continue to rotate circumferentially because of inertial great, so long-time, the motor shaft can be more serious to D-shaped section wearing and tearing, the condition such as installation looseness exists, and then there is serious potential safety hazard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an axial compressor fan blade of gaining in strength, eliminating the potential safety hazard.

In order to achieve the above object, the main technical solution of the present invention is an axial flow fan blade, comprising a hub, wherein a plurality of blades are regularly arranged on an outer side wall surface of the hub along a circumferential direction, a shaft sleeve is arranged at a center of the hub, and a through hole is arranged at a center of the shaft sleeve; under this scheme, through addding the axle sleeve inserts, increase the structure of its axle sleeve inside and improve the fan blade shaft hole fragile problem.

In some examples, the outer side wall of the shaft sleeve insert is at least provided with an inwards concave locking groove, and the inner side wall of the through hole attached to the outer side wall is at least provided with a positioning locking block matched with the locking groove; when the positioning locking block is placed in the locking groove, the shaft sleeve insert is locked and positioned in the through hole of the shaft sleeve; under the scheme, the whole axial flow fan blade is manufactured by firstly producing and processing a shaft sleeve insert and then injecting and molding the whole axial flow fan blade on the basis of the shaft sleeve insert.

In some examples, when the outer side wall of the shaft sleeve insert is provided with more than two locking grooves, the locking grooves are regularly arranged along the circumferential direction at equal circle center angles; the outer side wall axially sequentially comprises a first side wall area, a second side wall area and a third side wall area, and the locking groove is positioned in the second side wall area; in this scheme for all be in on same circumference in the locking fluting, prevent locking fluting dislocation set, promote its circumferential direction intensity of rotating.

In some examples, the axial direction of the shaft hole at least comprises a circular section and a D-shaped section in sequence, and the motor shaft is inserted from the circular section and is positioned in the D-shaped section in an opposite mode, and under the scheme, two schemes for realizing the existence of both the circular hole diameter and the D-row hole diameter in the same shaft hole are provided: one is made integrally, and the other is formed by welding two shaft holes with different shapes and apertures.

In some examples, the bushing insert is made of aluminum integrally.

In some examples, the bore edge of the shaft bore is provided with an inward chamfer to facilitate introduction of the motor shaft.

In some examples, the first side wall area and/or the second side wall area are/is provided with knurling for preventing slipping with the inner side wall of the through hole.

In some examples, the inner edges of the blades are axially obliquely disposed with respect to the outer sidewall surface of the hub; the blade is provided with a plurality of blast holes.

In some examples, a plurality of reinforcing ribs which are regularly arranged along the circumferential direction at an angle equal to the center of a circle are arranged between the inner wall of the hub and the outer side wall of the shaft sleeve.

In some examples, the blade is provided with a blade reinforcing rib, and the blade reinforcing rib is positioned on the suction surface of the blade; the blade reinforcing ribs and the blades are integrally formed; the blade reinforcing ribs are arranged at least along the outer contour edge of the rear edge of the blade.

The utility model discloses owing to adopted above technical scheme to realize following effect:

firstly, the problem that a shaft hole of a fan blade is easy to damage is solved by additionally arranging a shaft sleeve insert and increasing the structure in the shaft sleeve;

compared with the prior art that the shaft sleeve insert made of metal is integrally molded by plastic, the strength of the shaft sleeve insert is further improved;

and thirdly, the D-shaped section and the circular section of the shaft sleeve are integrally formed, so that the integral strength of the shaft sleeve insert is ensured.

Drawings

Figure 1 is a schematic structural view of an embodiment of the present invention,

figure 2 is a schematic cross-sectional structure view of the axial-flow fan blade of the embodiment of figure 1,

figure 3 is a schematic view of the construction of the bushing insert of the embodiment of figure 1,

figure 4 is a schematic cross-sectional view of the bushing insert of the embodiment of figure 1,

figure 5 is a schematic view of the hole site configuration of the bushing insert of the embodiment of figure 1,

in the figure: the axial sleeve comprises an axial sleeve insert 1, a locking groove 11, an inward chamfer 12, an axial hole 13, an axial sleeve 2, a blade 3, an air blast hole 4, a blade reinforcing rib 5 and a reinforcing rib 6.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is to be understood that the terms "a" and "an" are to be interpreted as meaning that a number of one element may be one in one embodiment or multiple in another embodiment, and the terms "a" and "an" are not to be interpreted as limiting the number.

The first embodiment is as follows:

referring to fig. 1 to 5 of the drawings attached to the specification of the present invention, an axial flow fan blade according to a preferred embodiment of the present invention is illustrated, the axial flow fan blade includes a hub, a plurality of blades 3 are regularly arranged on an outer side wall surface of the hub along a circumferential direction, a shaft sleeve 2 is provided at a center of the hub, a through hole is provided at a center of the shaft sleeve 2, the axial flow fan blade further includes a shaft sleeve insert 1, the shaft sleeve insert 1 is fixedly connected in the through hole, a shaft hole 13 for passing a motor shaft is provided at a center of the shaft sleeve insert 1, the shaft hole 13 and the through hole are on the same axis, the shaft hole 13 has at least one inner side wall including at least two linear sections which are not on the same circumferential line, i.e. a shape of the shaft hole 13 which is not a perfect circle, in this embodiment, an axial direction of the shaft hole 13 sequentially includes at least a circle section and a D-shaped section, the shaft hole 13 of the D-shaped section comprises a curve section on the same circumferential line and a straight section which is not on the circumferential line; thereby meeting the requirements of two linear sections which are not on the same circumference, and ensuring that the circumferential positioning between the motor shaft and the shaft sleeve insert 1 prevents the circumferential slipping; in addition, in this embodiment, the shaft sleeve insert 1 is made of aluminum or aluminum alloy, and the integral manufacture also reflects that the circular section and the D-shaped section are also integral, in some other embodiments, the circular section and the D-shaped section are welded together, in other words, the shaft sleeve insert 1 where the circular section is located and the shaft sleeve insert 1 where the D-shaped section is located are welded together, so as to form a complete shaft sleeve insert 1; compared with the scheme of welding forming, the scheme of integral forming has the advantages that the strength is obviously improved, no welding seam exists in the middle of integral forming, and the integral forming can be better arranged in the shaft sleeve 2; the shaft sleeve insert 1 made of metal materials such as aluminum or aluminum alloy has the advantages of better toughness and higher strength, and is not easy to be abraded by a motor shaft.

In order to circumferentially position the shaft sleeve insert 1 relative to the shaft sleeve 2 without circumferential slipping, the outer side wall of the shaft sleeve insert 1 is at least provided with an inward-recessed locking groove 11, and the inner side wall of the through hole attached to the outer side wall is at least provided with a positioning locking block matched with the locking groove 11; when the positioning locking block is placed in the locking groove 11, the shaft sleeve insert 1 is locked and positioned in the through hole of the shaft sleeve 2, and the shaft sleeve insert 1 and the shaft sleeve 2 are circumferentially positioned and do not slip; in this embodiment, four locking slots 11 are provided on the outer side wall of the shaft sleeve insert 1, and the locking slots 11 are regularly arranged along the circumferential direction of the shaft sleeve insert 1 at an angle equal to the center of a circle; the outer side wall of the shaft sleeve insert 1 axially and sequentially comprises a first side wall area, a second side wall area and a third side wall area, and the locking groove 11 is positioned in the second side wall area; in other embodiments, the four locking slots 11 are respectively arranged on the shaft sleeve insert 1 in a staggered manner, and compared with a scheme in the same circumferential direction, the scheme in the staggered manner has the advantages that the shaft sleeve insert 1 is deformed due to the circumferential rotation stress generated by the staggered manner, the edges of the locking slots 11 can be worn due to long-time circumferential rotation, the circumferential rotation stress generated in the same circumferential direction can be concentrated, the shaft sleeve insert 1 is not easily deformed, and the strength is higher.

In this embodiment, the first side wall area and the third side wall area are protruded outwards relative to the second side wall area, the first side wall area and the third side wall area are flush and are in contact with the inner wall of the through hole in an attaching manner, in order to increase the friction force of the contact surfaces of the first side wall area and the third side wall area and avoid slipping in the circumferential rotation process, and knurling is arranged on the surface of the first side wall area and/or the third side wall area; of course, knurling may be provided on the inner wall surface of the through hole which comes into contact with the first sidewall region and the third sidewall region.

In addition, in order to facilitate the guiding insertion of the motor shaft into the shaft hole 13, in the present embodiment, the hole diameter edge of the shaft hole 13 is provided with an inward chamfer 12 for facilitating the guiding of the motor shaft.

In the present embodiment, the inner edge of the blade 3 is axially inclined with respect to the outer side wall surface of the hub; a plurality of blast holes 4 are formed in the blade 3; a plurality of reinforcing ribs 6 which are regularly arranged along the circumferential direction at equal circle center angles are arranged between the inner wall of the hub and the outer side wall of the shaft sleeve 2; the blade 3 is provided with a blade reinforcing rib 5, and the blade reinforcing rib 5 is positioned on the suction surface of the blade 3; the blade reinforcing ribs 5 and the blades 3 are integrally formed; the blade reinforcing ribs 5 are at least arranged along the outer contour edge of the rear edge of the blade 3; certainly, the blade reinforcing ribs 5 can be arranged on the three outer circumferences (the rear edge, the outer edge and the front edge) of the blade 3, so that the strength of the blade 3 is greatly improved, and the bending resistance is improved.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention.

The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. The utility model provides an axial flow fan blade, includes wheel hub, a plurality of blades (3) are arranged along circumference rule to wheel hub's outside wall, and wheel hub center department is equipped with axle sleeve (2), and the center department of axle sleeve (2) is equipped with the through-hole, a serial communication port, axial flow fan blade still includes an axle sleeve inserts (1), axle sleeve inserts (1) fixed connection is in the through-hole, and the center department of axle sleeve inserts (1) is equipped with shaft hole (13) that are used for wearing to establish the motor shaft, shaft hole (13) and through-hole department are on same axis, shaft hole (13) have at least one section inside wall to include two linear sections not on same circumference at least.

2. The axial-flow fan blade according to claim 1, wherein the outer side wall of the shaft sleeve insert (1) is at least provided with an inwardly recessed locking groove (11), and the inner side wall of the through hole attached to the outer side wall is at least provided with a positioning locking block matched with the locking groove (11); when the positioning locking block is placed in the locking groove (11), the shaft sleeve insert (1) is locked and positioned in the through hole of the shaft sleeve (2).

3. The axial-flow fan blade according to claim 2, characterized in that when the outer side wall of the bushing insert (1) is provided with more than two locking slots (11), the locking slots (11) are regularly arranged along the circumferential direction at equal center angles; the outer side wall axially sequentially comprises a first side wall area, a second side wall area and a third side wall area, and the locking groove (11) is located in the second side wall area.

4. The axial-flow fan blade according to claim 1, wherein the axial direction of the shaft hole (13) at least comprises a circular section and a D-shaped section in sequence, and the motor shaft is inserted from the circular section and is positioned in the D-shaped section in an abutting mode.

5. The axial-flow fan blade according to claim 1, wherein the shaft sleeve insert (1) is made of aluminum integrally.

6. The axial-flow fan blade according to claim 1, wherein the aperture edge of the shaft hole (13) is provided with an inward chamfer (12) for facilitating the introduction of a motor shaft.

7. The axial-flow fan blade according to claim 3, wherein the first side wall area and/or the second side wall area is/are provided with knurls for preventing slipping with the inner side wall of the through hole.

8. The axial-flow fan blade according to claim 1, characterized in that the inner edge of the blade (3) is axially inclined relative to the outer side wall surface of the hub; the blade (3) is provided with a plurality of blast holes (4).

9. The axial flow fan blade according to claim 2, wherein a plurality of reinforcing ribs (6) are arranged between the inner wall of the hub and the outer side wall of the shaft sleeve (2) along the circumferential direction at equal center angles.

10. The axial-flow fan blade according to claim 1, wherein the blade (3) is provided with a blade reinforcing rib (5), and the blade reinforcing rib (5) is positioned on the suction surface of the blade (3); the blade reinforcing ribs (5) and the blades (3) are integrally formed; the blade reinforcing ribs (5) are arranged at least along the outer contour edge of the rear edge of the blade (3).