CN218971488U

CN218971488U - Impeller of axial flow fan

Info

Publication number: CN218971488U
Application number: CN202222968526.1U
Authority: CN
Inventors: 李博; 胡绍恒
Original assignee: Hangzhou Weiguang Electronic Co Ltd
Current assignee: Hangzhou Weiguang Electronic Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-05-05
Anticipated expiration: 2032-11-08

Abstract

The present utility model relates to an axial flow fan impeller. The problem of current axial fan impeller integrated into one piece exist with high costs, unable quantity and the angle of adjusting the blade according to actual demand is solved. The impeller comprises a rotor shell and blades, a plurality of fixing supports are uniformly arranged on the outer wall of the rotor shell around the center, an auxiliary support is connected between the bottom of the fixing support and the rotor shell, a plurality of limit grooves are formed in the fixing supports, a plurality of raised strips are correspondingly arranged on the roots of the blades, the blades are fixedly arranged on the fixing supports, and the raised strips are clamped in the limit grooves. According to the utility model, the blades and the rotor shell are detached and fixed through the bracket, so that the die cost is reduced, and the production efficiency is improved. The number and the angle of the blades can be adjusted according to actual demands, so that different fan starting performance indexes are realized.

Description

Impeller of axial flow fan

Technical Field

The utility model relates to the technical field of fans, in particular to an axial flow fan impeller.

Background

The axial flow fan is a fan commonly used by enterprises, the structure of the axial flow fan mainly comprises an impeller, the existing impeller is generally formed by integrally injection molding or die casting, the production is more convenient, but the impeller formed integrally needs to be manufactured into a die, the cost is increased, and the number and the angle of impeller blades cannot be adjusted due to the integral forming, so that the axial flow fan cannot be adapted to fans with different air performance indexes, and the die is additionally manufactured every time the adjustment is performed, thereby further increasing the manufacturing cost.

Disclosure of Invention

The utility model mainly solves the problems that the existing axial flow fan impeller is high in cost and cannot adjust the number and the angle of blades according to actual demands in an integrated mode, and provides the axial flow fan impeller.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides an axial fan impeller, includes rotor shell and the blade that evenly sets up around rotor shell, evenly is provided with a plurality of fixed bolsters around the center on rotor shell's outer wall, is connected with the auxiliary stand between fixed bolster bottom and rotor shell, is provided with a plurality of spacing grooves on the fixed bolster, corresponds on the blade root and is provided with a plurality of sand grip, blade fixed mounting is on the fixed bolster, sand grip joint is in the spacing groove.

The utility model separates the blades of the axial flow fan impeller and the rotor shell, and the blades are installed and fixed through the bracket, so that compared with the axial flow fan impeller which is integrally injection molded or die-cast molded, the die cost is reduced, and the production efficiency is improved. And because the impeller is a split assembly structure, the number and the angle of the blades can be adjusted according to actual requirements, and different fan starting performance indexes such as air quantity, air pressure, noise and the like are realized. The fixed structure that has adopted fixed bolster and auxiliary stand of blade, the auxiliary stand that increases is arranged in between fixed bolster and the rotor housing outer wall, has strengthened the intensity of impeller root for fan operation is safer. The blade is fixed with the fixed bolster adoption sand grip and spacing groove mode cooperation, plays limiting displacement to the installation of blade, and the shearing force that produces when having reduced the blade rotation influences junction for the blade is connected more tightly with the fixed bolster, has improved stability, has prolonged life, and limit structure has also made things convenient for the installation of blade simultaneously, and mounting structure is more unanimous.

As a preferable scheme of the scheme, the fixing support comprises a fixing part and a reinforcing part, the fixing part and the reinforcing part are integrally bent, the fixing part and the reinforcing part are mutually angled, the side edges of the fixing part and the reinforcing part are fixed on the outer wall of the rotor shell through welding, and the blade is fixedly arranged on the fixing part. In this scheme, the fixed bolster is buckled into L type structure, adopts metal material such as steel sheet to bend the shaping once, forms fixed part and the reinforcing part two parts of buckling mutually, and the fixed bolster passes through welded fastening on the rotor housing, and the structure of fixed bolster makes to be connected more fastening with the rotor housing, and the difficult emergence is out of shape more, has strengthened the intensity of impeller root.

As a preferable scheme of the scheme, the upper edge of the auxiliary support is provided with a plurality of clamping heads, one side of the fixing support is correspondingly provided with a plurality of clamping grooves, the auxiliary support is vertically spliced with the fixing support, and the clamping heads are inserted into the clamping grooves. This scheme adopts the dop draw-in groove concatenation form to connect, and the fixed bolster is more fastened with auxiliary support connection, and auxiliary support installs the opposite side at the relative strengthening portion of fixed bolster, has further strengthened the intensity of impeller root.

As a preferable scheme of the scheme, the limit grooves are long grooves, three limit grooves are formed, the limit grooves are distributed in a triangular mode at the center of the fixing support, and the raised strips are long-strip-shaped structures matched with the limit grooves. In this scheme the spacing groove preferably sets up three, and distributes with triangle-shaped shape, preferably takes shape finished product font structure, and spacing groove and sand grip adopt elongated structure to cooperate, and this scheme structure makes blade and fixed bolster cooperate the back more firm stable.

As a preferable scheme of the scheme, a screw hole is formed in the fixing support, the screw hole is located in the center of the limiting groove, and the blade is fixed with the fixing support through a bolt. The blade and the fixed support are fixed through the bolt. Screw holes are formed in the centers of limiting grooves of the fixing support, press riveting nuts are arranged on the bottom surfaces of the fixing support, corresponding to the screw holes, the press riveting nuts are fixed on the fixing support through spot welding, and after the blades are installed with the fixing support, the blades are screwed into the press riveting nuts through bolt dispensing, so that the blades are fixed.

As a preferable mode of the above scheme, a mounting boss is provided on the bottom surface of the root of the blade, and the surface of the mounting boss is matched and fixed with the fixing bracket. The blade root bottom surface is provided with the installation boss in the protruding mode, and installation boss surface is the plane, and with fixed bolster surface cooperation concatenation, then fix through the bolt, this scheme makes blade and fixed bolster connection inseparabler and stable.

The utility model has the advantages that:

1. the blades of the axial flow fan impeller and the rotor shell are split and are installed and fixed through the support, and compared with the axial flow fan impeller which is integrally injection molded or die-cast molded, the axial flow fan impeller reduces the die cost and improves the production efficiency.

2. The impeller is of a split assembly structure, the number and the angle of the blades can be adjusted according to actual requirements, and different fan starting performance indexes such as air quantity, air pressure, noise and the like are realized.

3. The structure of fixed bolster and auxiliary stand has been adopted, and the auxiliary stand that increases is arranged in between fixed bolster and the rotor housing outer wall, has strengthened the intensity of impeller root for fan operation is safer.

4. The blade is fixed with the fixed bolster adoption sand grip and spacing groove mode cooperation, plays limiting displacement to the installation of blade, and the shearing force that produces when having reduced the blade rotation influences junction for the blade is connected more tightly with the fixed bolster, has improved stability, has prolonged life, and limit structure has also made things convenient for the installation of blade simultaneously, and mounting structure is more unanimous.

Drawings

FIG. 1 is a schematic view of a construction of the present utility model;

FIG. 2 is a schematic view of a structure in which a fixing bracket is connected with a blade;

FIG. 3 is a schematic view of a blade root configuration according to the present utility model;

FIG. 4 is a schematic view of a structure of a fixing bracket according to the present utility model;

fig. 5 is a schematic structural view of the auxiliary bracket in the present utility model.

1-a rotor shell 2-a blade 3-a fixed support 4-an auxiliary support 5-a fixed part 6-a reinforcing part 7-a convex strip 8-a limit groove 9-a clamping groove 10-a clamping head 11-a screw hole 12-a mounting boss.

Detailed Description

The technical scheme of the utility model is further described below through examples and with reference to the accompanying drawings.

Examples:

an axial flow fan impeller of this embodiment, as shown in fig. 1, includes a rotor housing 1 and blades 2 uniformly disposed around the rotor housing, the blades being fixedly connected to the rotor housing by a fixing bracket.

As shown in fig. 2 and 4, the fixing bracket 3 is L-shaped and is formed by bending a metal material such as a steel plate at a time, and the fixing bracket includes a fixing portion 5 and a reinforcing portion 6 which are bent, and the side edges of the fixing portion and the reinforcing portion are fixed on the rotor housing by welding. In order to further strengthen the strength of the impeller root, an auxiliary support is further connected between the fixing support and the outer wall of the rotor shell, and is plate-shaped as shown in fig. 2, 4 and 5, two clamping heads 10 are arranged on the upper edge of the auxiliary support, two clamping grooves 9 are correspondingly formed in one side of the fixing support, the auxiliary support is vertically spliced with the fixing support, the clamping heads are inserted into the clamping grooves, and the auxiliary support is fixed with the fixing support and the rotor shell through spot welding.

As shown in fig. 4, the fixing support is provided with a plurality of limiting grooves, in this embodiment, three limiting grooves are preferably arranged, the three limiting grooves are distributed in a delta shape at the center of the fixing support, and as shown in fig. 3, three convex strips distributed in a delta shape are correspondingly arranged at the root of the blade. The bottom surface of the root of the blade is provided with a mounting boss 12 corresponding to the fixing bracket, and the boss is arranged on the mounting boss. When the blade is spliced with the fixed support, the installation boss is contacted with the fixed support, and the convex strip is inserted into the limit groove to play a firm positioning role.

The blade fixing device comprises a fixing support, a blade and a blade, wherein a screw hole 11 is formed in the fixing support, the screw hole is located at the center of a limiting groove, a press-riveting nut is arranged on the bottom surface of the fixing support corresponding to the screw hole, the press-riveting nut is fixed on the fixing support through spot welding, and after the blade is installed with the fixing support, the blade is screwed into the press-riveting nut through bolt dispensing.

When the impeller of the embodiment is assembled, the press-riveting nut is welded at the screw hole, the auxiliary support and the fixing support are spliced and fixed by spot welding, the blade is screwed into the press-riveting nut by spot welding through the bolt, and finally the combined blade and the support are welded on the rotor shell.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although the terms rotor housing, vane, mounting bracket, auxiliary bracket, mounting portion, etc. are used more herein, the possibility of using other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The utility model provides an axial fan impeller, includes rotor housing and the blade that evenly sets up around rotor housing, its characterized in that: a plurality of fixed brackets are uniformly arranged on the outer wall of the rotor shell around the center, an auxiliary bracket is connected between the bottom of the fixed bracket and the rotor shell, a plurality of limit grooves are formed in the fixed brackets, a plurality of raised strips are correspondingly arranged on the root parts of the blades, the blades are fixedly arranged on the fixed brackets, and the raised strips are clamped in the limit grooves.

2. The axial flow fan impeller according to claim 1, wherein the fixing bracket comprises a fixing part and a reinforcing part, the fixing part and the reinforcing part are integrally bent, the fixing part and the reinforcing part are mutually angled, the side edges of the fixing part and the reinforcing part are fixed on the outer wall of the rotor shell through welding, and the blade is fixedly arranged on the fixing part.

3. The impeller of an axial flow fan according to claim 2, wherein a plurality of clamping heads are arranged at the upper edge of the auxiliary support, a plurality of clamping grooves are correspondingly arranged on one side of the fixed support, the auxiliary support is vertically spliced with the fixed support, and the clamping heads are inserted into the clamping grooves.

4. The axial flow fan impeller according to claim 2 or 3, wherein the limit grooves are elongated grooves, three limit grooves are arranged, the limit grooves are distributed in a triangle shape at the center of the fixing support, and the raised strips are of an elongated structure matched with the limit grooves.

5. The impeller of an axial flow fan according to claim 4, wherein a screw hole is formed in the fixing bracket, the screw hole is located at the center of the limit groove, and the blade is fixed to the fixing bracket by a bolt.

6. An axial flow fan impeller according to claim 1, 2 or 3, wherein a mounting boss is provided on the bottom surface of the root portion of the blade, and the surface of the mounting boss is fixed in cooperation with a fixing bracket.