CN216518831U

CN216518831U - Fan blade with saw teeth on rear edge for fan

Info

Publication number: CN216518831U
Application number: CN202123292008.4U
Authority: CN
Inventors: 周冬旺
Original assignee: Guangdong Weimai Motor Co ltd
Current assignee: Guangdong Weimai Motor Co ltd
Priority date: 2021-12-25
Filing date: 2021-12-25
Publication date: 2022-05-13
Anticipated expiration: 2031-12-25

Abstract

The utility model relates to the technical field of fans, and particularly discloses a fan blade with saw teeth on the rear edge of a fan, which comprises an impeller, wherein a plurality of nut pieces which are uniformly distributed are arranged on the outer side of the impeller, the nut pieces are integrally connected with the impeller, a rotating shaft through hole is formed in the center of the impeller, the nut pieces are connected with blades, and a plurality of saw-toothed grooves are formed in the rear edge of each blade. According to the utility model, the rear edge of the blade is provided with the plurality of saw-toothed grooves, and the rear edge of the blade is made into saw-toothed shapes, so that wake vortex can be effectively reduced, the influence of the wake vortex is reduced, and the energy consumption loss of the fan is reduced; and can reduce the vortex noise to reduce the fan noise, user experience is effectual.

Description

Fan blade with saw teeth on rear edge for fan

Technical Field

The utility model relates to the technical field of fans, in particular to a fan blade with sawteeth on the rear edge for a fan.

Background

The axial flow fan has a wide application range, namely, the axial flow fan and the fan of the air conditioner external unit are airflow in the same direction as the shaft of the fan blade, such as an electric fan, and the fan operates in an axial flow mode. The "axial flow" is so called because the gas flows parallel to the fan axis. Axial flow fans are typically used in applications where flow requirements are high and pressure requirements are low. The axial fan fixes the position and moves the air. The axial flow fan mainly comprises a fan impeller and a casing. However, the existing fan impeller has the following defects:

1. when the airflow leaves the impeller, a wake vortex (karman vortex street) can be formed due to certain thickness of the rear edge (airflow outlet) of the blade, so that the energy consumption loss of the fan is caused;

2. when the air flow leaves the impeller, the wake vortex is formed, so that the vortex noise is generated, and the noise of the fan is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that in order to overcome the defects in the prior art, the utility model provides the fan blade with the saw teeth on the rear edge for the fan, and the rear edge of the blade is made into a saw shape by arranging a plurality of saw-tooth-shaped grooves on the rear edge of the blade, so that wake vortex can be effectively reduced, the influence of the wake vortex is reduced, and the energy consumption loss of the fan is reduced; and can reduce the vortex noise to reduce the fan noise, user experience is effectual.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a trailing edge band saw tooth fan blade for fan, includes the impeller, the outside of impeller is provided with a plurality of evenly distributed's nut spare, nut spare and impeller integration are connected, the center department of impeller has seted up the pivot through-hole, the nut spare is connected with the blade, a plurality of cockscomb structure recess has been seted up to the trailing edge of blade.

Preferably, one end of the blade is provided with a screw member connected with the nut member, and the screw member is integrally connected with the blade.

Preferably, the inner peripheral wall of the nut member is provided with an internal thread, and the outer peripheral wall of the nut member is provided with an external thread adapted to the internal thread.

Preferably, the surface of the blade is provided with a plurality of flow guide bulges.

Preferably, the nut member includes a first nut member, a second nut member, a third nut member and a fourth nut member, and the first nut member, the second nut member, the third nut member and the fourth nut member are all uniformly arranged around the edge of the impeller in sequence.

Preferably, the blades include a first blade, a second blade, a third blade and a fourth blade, and the first blade, the second blade, the third blade and the fourth blade are respectively screwed with the first nut member, the second nut member, the third nut member and the fourth nut member.

By adopting the technical scheme, the fan blade with the saw teeth at the rear edge for the fan, provided by the utility model, has the following beneficial effects: the outer side of an impeller in the air vane with sawteeth at the rear edge is provided with a plurality of nut pieces which are uniformly distributed, the nut pieces are integrally connected with the impeller, a rotating shaft through hole is formed in the center of the impeller, the nut pieces are connected with blades, a plurality of sawtooth-shaped grooves are formed in the rear edge of each blade, and the rear edge of each blade is made into a sawtooth shape by forming the plurality of sawtooth-shaped grooves in the rear edge of each blade, so that wake vortexes can be effectively reduced, the influence of the wake vortexes is reduced, the energy consumption loss of a fan is reduced, and the working efficiency of the fan is improved; the formation of wake vortex is reduced, so that the vortex noise can be reduced, the noise of the fan is reduced, the use satisfaction of a user is greatly improved, and the user experience effect is good.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

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

in the figure, 1-impeller, 2-nut piece, 3-rotating shaft through hole, 4-blade, 5-sawtooth groove, 6-screw piece, 7-guide projection, 8-first nut piece, 9-second nut piece, 10-third nut piece, 11-fourth nut piece, 12-first blade, 13-second blade, 14-third blade and 15-fourth blade.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1-3, the trailing edge band saw blade for a fan comprises an impeller 1, a plurality of nut pieces 2 which are uniformly distributed are arranged on the outer side of the impeller 1, the nut pieces 2 are integrally connected with the impeller 1, a rotating shaft through hole 3 is formed in the center of the impeller 1, the nut pieces 2 are connected with blades 4, and a plurality of saw-toothed grooves 5 are formed in the trailing edge of the blades 4. It can be understood that the type of the blade with the saw teeth at the rear edge is an axial flow blade, the blade is applied to an axial flow fan, the axial flow fan can be used for air cooling and heat dissipation of an air conditioning module unit, and the blade is an operation part on the axial flow fan. It will be appreciated that the impeller 1 may be a conventional fan impeller or the like; the blade 4 may be cast aluminum or the like.

Specifically, one end of the blade 4 is provided with a screw piece connected with the nut piece 2, and the screw piece is integrally connected with the blade 4; the inner peripheral wall of the nut member 2 is provided with an internal thread, and the outer peripheral wall of the screw member 6 is provided with an external thread matched with the internal thread; the surface of the blade 4 is provided with a plurality of flow guide bulges 7; the nut member 2 comprises a first nut member 8, a second nut member 9, a third nut member 10 and a fourth nut member 11, and the first nut member 8, the second nut member 9, the third nut member 10 and the fourth nut member 11 are all uniformly arranged around the edge of the impeller 1 in sequence; the blades 4 comprise a first blade 12, a second blade 13, a third blade 14 and a fourth blade 15, wherein the first blade 12, the second blade 13, the third blade 14 and the fourth blade 15 are respectively in threaded connection with the first nut member 8, the second nut member 9, the third nut member 10 and the fourth nut member 11 through the screw member 6; the cross section of the flow guide bulge 7 is arc-shaped. It can be understood that when the fan blade with the saw teeth at the rear edge rotates, airflow flows in from the front edge of the blade 4 and flows out from the rear edge of the blade 4, and due to the fact that the saw-toothed grooves are formed in the rear edge of the blade 4, wake vortexes can be effectively reduced.

It can be understood that the utility model has reasonable design and unique structure, and the fan blade with the band saw teeth at the rear edge has the following advantages:

1. the rear edge of the blade 4 on the impeller is made into a sawtooth shape, so that wake vortex can be effectively reduced, the influence of the wake vortex is reduced, the energy consumption loss of the fan during operation is reduced, and the working efficiency of the fan is improved;

2. the rear edge of the blade 4 is made into a sawtooth shape, so that the formation of wake vortex is reduced, and the vortex noise is reduced, thereby reducing the noise of the fan.

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 described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims

1. The utility model provides a trailing edge band saw tooth fan blade for fan which characterized in that: the impeller comprises an impeller, wherein a plurality of nut pieces which are uniformly distributed are arranged on the outer side of the impeller, the nut pieces are integrally connected with the impeller, a rotating shaft through hole is formed in the center of the impeller, the nut pieces are connected with blades, and a plurality of sawtooth-shaped grooves are formed in the rear edges of the blades.

2. The trailing edge blade with saw teeth for the fan as claimed in claim 1, wherein: and one end of the blade is provided with a screw piece connected with the nut piece, and the screw piece is integrally connected with the blade.

3. The trailing edge blade with saw teeth for the fan as claimed in claim 2, wherein: the internal peripheral wall of nut spare is provided with the internal thread, the periphery wall of screw spare is provided with the external screw thread of internal thread looks adaptation.

4. The trailing edge blade with saw teeth for the fan as claimed in claim 1, wherein: the surface of the blade is provided with a plurality of flow guide bulges.

5. The trailing edge blade with saw teeth for the fan as claimed in claim 1, wherein: the nut piece comprises a first nut piece, a second nut piece, a third nut piece and a fourth nut piece, and the first nut piece, the second nut piece, the third nut piece and the fourth nut piece are all uniformly arranged around the edge of the impeller in sequence.

6. The trailing edge blade with saw teeth for the fan as claimed in claim 5, wherein: the blades comprise a first blade, a second blade, a third blade and a fourth blade, and the first blade, the second blade, the third blade and the fourth blade are respectively in threaded connection with the first nut piece, the second nut piece, the third nut piece and the fourth nut piece.