Mesh cover supporting structure of large-diameter axial flow fan stator shaft

Abstract

The utility model relates to the technical field of fans, in particular to a mesh enclosure supporting structure of a stator shaft of a large-diameter axial flow fan, which is characterized in that mesh wires on a mesh enclosure are firmly welded with a fixed disc, so that a front mesh enclosure and a rear mesh enclosure of the fan can firmly support two ends of the stator shaft, an outer rotor motor of the axial flow fan and at least two blades, and the front mesh enclosure and the rear mesh enclosure are arranged, a stator shaft of the outer rotor motor extends out of the outer rotor in two directions, the two ends of the stator shaft are supported and fixed by a front mesh enclosure and a rear mesh enclosure respectively, the front mesh enclosure and the rear mesh enclosure respectively comprise fixing discs which are located in the center portions of the front mesh enclosure and the rear mesh enclosure and used for supporting and fixing the two ends of the stator shaft, and the front mesh enclosure and the rear mesh enclosure respectively comprise circumferential mesh wires and radial mesh wires. The fixing disc is a steel plate forming piece, a plurality of welding grooves are inwards formed in the outer end face of the fixing disc, the cross section of each welding groove is in an arc shape with the radius roughly the same as the radius of the radial net wires, at least part of the radial net wires are partially embedded into the welding grooves, and the radial net wires and the fixing disc are connected at the edges of the opening portions of the welding grooves in a welded mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field especially is big diameter axial flow fan stator axle's mesh enclosure support structure. BACKGROUND

[0002] Household floor electric fan is a kind of internal rotor axial flow fan, its structure is that impeller is installed on the protruding shaft of motor, and the impeller is wrapped and protected by front and rear mesh enclosures, the rear mesh enclosure is fixed on the motor shell, and the front mesh enclosure is fixed on the rear mesh enclosure, and the motor is an internal rotor motor;The cooling fan at the computer CPU is a kind of external rotor axial flow fan, and the blade of the fan is installed on the external rotor;The structures of the two kinds of fans are either that impeller is installed on the protruding shaft or that the external rotor equipped with impeller is rotated and supported by the protruding stator shaft, and the rotating shaft or the stationary shaft is a cantilever support shaft.

[0003] The structure of the computer CPU external rotor axial flow fan is only suitable for making such small cooling fan, and only the structure of household fan can be used for making large-diameter axial flow fan, and the outer diameter of the impeller of large-diameter axial flow fan reaches more than 1.5 meters, but when the structure of household fan is used for making large-diameter axial flow fan, the diameter of motor shaft and the torque of motor are relatively large in view of the strength and rigidity requirements of cantilever protruding shaft for supporting large-diameter impeller, so the weight and volume of the selected motor are relatively large, and the fixed support for supporting the motor also needs to have sufficient strength and rigidity, so the material consumption of the whole fan of the existing large-diameter axial flow fan is large, and the performance-price ratio of the product is low.

[0004] Designing a fan of external rotor motor and making the two ends of stator shaft protrude and be supported and fixed on front and rear mesh enclosures can overcome the above-mentioned defects, but this structure needs to overcome another technical problem, that is, how to fix the stator shaft on the front and rear mesh enclosures, and a fixed disc is arranged on the central part of the front and rear mesh enclosures, and the stator shaft is fixedly installed in the mounting hole of the fixed disc, due to the rotation vibration of external rotor on the stator shaft and the repeated inertial impact of forward and reverse torque load when large-diameter impeller starts and stops, the surface of mesh wire of mesh enclosure welded on the fixed disc is easy to crack from the welding seam, thereby causing the problem that the front and rear mesh enclosures cannot firmly support the stator shaft. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems that a kind of large-diameter axial flow fan stator axle's mesh enclosure support structure is provided, and the mesh wire on mesh enclosure is firmly welded with fixed disc, so that the front and rear mesh enclosures of the fan can firmly support the two ends of stator axle.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a mesh support structure for the stator shaft of a large-diameter axial flow fan, wherein the axial flow fan has an outer rotor motor and at least two blades, the outer rotor motor has a stator shaft and an outer rotor, and at least two blades are circumferentially fixed on the outer rotor, the axial flow fan has a front mesh cover and a rear mesh cover, the stator shaft of the outer rotor motor extends bidirectionally from the inside of the outer rotor and is supported and fixed at both ends by the front mesh cover and the rear mesh cover respectively, the front mesh cover and the rear mesh cover each include a fixing plate located at their respective center to support and fix both ends of the stator shaft, and the front mesh cover and the rear mesh cover each include circumferential mesh wires and radial mesh wires;

[0007] The fixing plate is a steel plate forming part. Several welding grooves are formed inward on the outer end face of the fixing plate. The cross-section of the welding groove is an arc shape with a radius approximately the same as the radius of the radial mesh wire. At least a portion of the radial mesh wire is embedded in the welding groove. The radial mesh wire is welded to the fixing plate at the edge of the opening of the welding groove.

[0008] Specifically, in order to further improve the supporting rigidity of the fixed plate, a circumferential reinforcing groove is formed inward on the outer end face of the fixed plate, and the circumferential reinforcing groove is connected to all the welding grooves.

[0009] Specifically, the front and rear mesh covers are planar circular mesh covers, and the fan also has a cylindrical mesh cover. The front and rear mesh covers are respectively installed on the front and rear openings of the cylindrical mesh cover.

[0010] Specifically, for ease of processing and to further improve welding strength, the aforementioned welding grooves are distributed in groups on the outer end face of the fixed plate. Each group of welding grooves includes two parallel welding grooves, and each group of welding grooves embeds the two parallel ends of a radial mesh wire bent into a U shape.

[0011] Specifically, in order to improve the support rigidity of the fixed plate, the fixed plate has a protrusion that extends into the fan, the mounting hole for supporting the stator shaft is located on the platform wall of the protrusion, and the fixing nut for fixing the stator shaft is located in the cavity on the back of the protrusion.

[0012] Specifically, the external rotor motor is a brushless motor.

[0013] Specifically, the circumferential mesh wires on the front and rear mesh covers are single spiral wires.

[0014] Alternatively, the circumferential wires on the front and rear mesh covers are several concentrically arranged loop wires.

[0015] The beneficial effects of this utility model are as follows: The axial flow fan provided by this utility model allows the stator shaft of the external rotor motor to extend in both directions, with blades set on the external rotor. The two ends of the stator shaft are supported by front and rear mesh covers respectively, and the support at both ends of the stator shaft makes the motor rotate stably. The fixing plate supporting the stator shaft is made of steel plate forming parts. The welding groove on the fixing plate embeds part of the radial mesh wire, and two welds are formed on both sides of each radial mesh wire to weld with the fixing plate. The firm welding of the mesh wire in the mesh cover to the fixing plate realizes the firm support of the mesh cover for the stator shaft. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is the front view of this utility model;

[0018] Figure 2 This is a partial sectional view of the present invention along the motor axis;

[0019] Figure 3 This is a front view of the front mesh cover in this utility model;

[0020] Figure 4 This is a front view of the fixed disk in this utility model;

[0021] Figure 5 yes Figure 4 AA section view;

[0022] Figure 6 This is a diagram showing the welding relationship between the front grille and the fixed plate;

[0023] Figure 7 yes Figure 6 BB cross-section.

[0024] In the attached diagram: 1. Blade;

[0025] 2. Stator shaft;

[0026] 3. External rotor;

[0027] 4. Front grille;

[0028] 5. Rear mesh cover;

[0029] 6. Fixing plate; 6-1. Welding groove; 6-2. Circumferential reinforcing groove; 6-3. Protrusion; 6-4. Mounting hole; 6-5. Cavity.

[0030] 7. Circumferential mesh wire;

[0031] 8. Radial wire mesh;

[0032] 9. Cylindrical mesh cover;

[0033] 10. Secure the nuts. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] As attached Figure 1 The large-diameter axial flow fan stator shaft mesh support structure, combined with the attached Figure 2 The cross-sectional view shows an axial flow fan with an outer rotor motor and three blades 1. The outer rotor motor has a stator shaft 2 and an outer rotor 3. The three blades 1 are circumferentially fixed on the outer rotor 3. The axial flow fan has a front screen 4 and a rear screen 5. The stator shaft 2 of the outer rotor motor extends bidirectionally from the inside of the outer rotor 3 and is supported and fixed at both ends by the front screen 4 and the rear screen 5, respectively. The front screen 4 and the rear screen 5 each include a fixing disc 6 located at their respective centers to support and fix both ends of the stator shaft 2. The front screen 4 and the rear screen 5 each include circumferential mesh wires 7 and radial mesh wires 8. Figure 3 The shapes of the circumferential wire 7 and the radial wire 8 are shown. The front mesh cover 4 and the rear mesh cover 5 are the same. Figure 3 The circumferential mesh wires 7 on the front mesh cover 4 and the rear mesh cover 5 shown are several concentrically arranged loop wires, or the circumferential mesh wires 7 on the front mesh cover 4 and the rear mesh cover 5 can be a single spiral wire.

[0036] like Figure 4 and Figure 5 As shown, the fixing plate 6 is a steel plate forming part. Eight sets of 16 welding grooves 6-1 are formed inward on the outer end face of the fixing plate 6. The welding grooves 6-1 are roughly radial grooves, and the cross-section of the welding grooves 6-1 is an arc shape with a radius approximately the same as the radius of the radial mesh wire 8. The radial mesh wire 8 is partially embedded in the welding grooves 6-1. The radial mesh wire 8 and the fixing plate 6 are welded together at the edge of the opening of the welding grooves 6-1. The welding method between the radial mesh wire 8 and the fixing plate 6 is shown in [the diagram]. Figure 6 and Figure 7Each set of welding grooves 6-1 includes two parallel welding grooves 6-1. Each set of welding grooves 6-1 has two parallel ends of a radial mesh wire 8 bent into a U-shape embedded in it. The front mesh cover 4 also has a radial mesh wire 8 that is not welded to the fixed plate 6. The radial mesh wire 8 that is not connected to the fixed plate 6 only serves to connect the circumferential mesh wire 7. The circumferential mesh wire 7 and the radial mesh wire 8 are butt welded together at the contact point.

[0037] Still see Figure 4 The outer end face of the fixed plate 6 is also formed with a circumferential reinforcing groove 6-2, which connects to all the welding grooves 6-1, see attached. Figure 5 The outermost ring of the fixed plate 6 is also formed with a folded edge to increase strength.

[0038] like Figure 2 As shown, the front mesh cover 4 and the rear mesh cover 5 are planar circular mesh covers. The fan also has a cylindrical mesh cover 9, with the front mesh cover 4 and the rear mesh cover 5 respectively covering the front and rear openings of the cylindrical mesh cover 9.

[0039] like Figure 2 and Figure 5 The center of the fixed plate 6 has a protrusion 6-3 that extends into the fan. The mounting hole 6-4 supporting the stator shaft 2 is located on the platform wall of the protrusion 6-3. The fixing nut 10 for fixing the stator shaft 2 is located in the cavity 6-5 on the back of the protrusion 6-3.

[0040] In addition, the external rotor motor can be a brushless motor.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mesh cover support structure for the stator shaft of a large-diameter axial flow fan, characterized in that: The axial flow fan has an external rotor motor and at least two blades (1). The external rotor motor has a stator shaft (2) and an external rotor (3). At least two blades (1) are circumferentially fixed on the external rotor (3). Its characteristic is that: The axial flow fan has a front screen (4) and a rear screen (5). The stator shaft (2) of the external rotor motor extends outward from the outside rotor (3) in both directions and is supported and fixed at both ends by the front screen (4) and the rear screen (5) respectively. The front screen (4) and the rear screen (5) each include a fixing plate (6) located at their respective centers to support and fix both ends of the stator shaft (2). The front screen (4) and the rear screen (5) each include circumferential mesh wire (7) and radial mesh wire (8). The fixing plate (6) is a steel plate forming part. Several welding grooves (6-1) are formed inward on the outer end face of the fixing plate (6). The cross-section of the welding groove (6-1) is an arc with a radius approximately the same as the radius of the radial wire (8). At least a portion of the radial wire (8) is embedded in the welding groove (6-1). The radial wire (8) and the fixing plate (6) are welded together at the edge of the opening of the welding groove (6-1).

2. The mesh cover support structure for the stator shaft of a large-diameter axial flow fan according to claim 1, characterized in that: The outer end face of the fixed plate (6) is also formed with a circumferential reinforcing groove (6-2), which is connected to all the welding grooves (6-1).

3. The mesh cover support structure for the stator shaft of a large-diameter axial flow fan according to claim 1, characterized in that: The front mesh cover (4) and the rear mesh cover (5) are planar circular mesh covers. The fan also has a cylindrical mesh cover (9). The front mesh cover (4) and the rear mesh cover (5) are respectively placed over the front and rear openings of the cylindrical mesh cover (9).

4. The mesh cover support structure for the stator shaft of a large-diameter axial flow fan according to claim 1, characterized in that: The aforementioned welding grooves (6-1) are distributed in groups on the outer end face of the fixed plate (6). Each group of welding grooves (6-1) includes two parallel welding grooves (6-1), and each group of welding grooves (6-1) has two parallel ends of a radial mesh wire (8) bent into a U shape embedded in it.

5. The mesh cover support structure for the stator shaft of a large-diameter axial flow fan according to claim 1, characterized in that: The fixed plate (6) has a protrusion (6-3) that extends into the fan, a mounting hole (6-4) supporting the stator shaft (2) is located on the platform wall of the protrusion (6-3), and a fixing nut (10) fixing the stator shaft (2) is located in the cavity (6-5) on the back of the protrusion (6-3).

6. The mesh cover support structure for the stator shaft of a large-diameter axial flow fan according to claim 1, characterized in that: The external rotor motor is a brushless motor.

7. The mesh cover support structure for the stator shaft of a large-diameter axial flow fan according to claim 1, characterized in that: The circumferential mesh wires (7) on the front mesh cover (4) and the rear mesh cover (5) are single spiral wires.

8. The mesh cover support structure for the stator shaft of a large-diameter axial flow fan according to claim 1, characterized in that: The circumferential wires (7) on the front mesh cover (4) and the rear mesh cover (5) are several concentrically arranged loop wires.

Images