Novel axial flow fan with diffusion-shaped mesh enclosure

Abstract

The novel axial flow fan comprises an air guide cylinder, a rectangular panel is formed at the lower end of the air guide cylinder, a connecting folded edge folded outwards is formed at the upper end of the air guide cylinder, a motor and an impeller are inserted into the air guide cylinder, the impeller is fixedly connected to a rotating shaft of the motor, and the upper portion of the motor extends out of the air guide cylinder and is sleeved with the diffusion net cover. A plurality of motor brackets are inserted into the diffusion mesh enclosure, and the motor is fixedly connected with the air duct through the motor brackets; the diffusion net cover is provided with a plurality of rib rods which are located above the motor and are in a diffusion shape, the outer ends of the rib rods are bent to form connecting rods, the lower ends of the connecting rods are bent to form connecting supporting lugs, and the connecting supporting lugs are fixedly connected to the connecting folded edges of the air guide cylinder through first bolt assemblies; a plurality of vertically-distributed diffusion net rings are fixed to connecting rods of the diffusion net cover in an inserted and sleeved mode, and a plurality of horizontally-distributed protective net rings are fixedly connected to rib rods of the diffusion net cover. The axial flow fan is provided with the diffusion and protection integrated net cover, so that the axial flow fan can be conveniently manufactured and assembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of axial flow fan, more particularly to a novel axial flow fan with diffusion-shaped mesh cover. BACKGROUND

[0002] The axial flow fan is widely used, and the airflow is in the same direction as the shaft of the fan blade, such as an electric fan. The current axial flow fan generally comprises a wind guide cylinder, a motor, an impeller, a motor mounting bracket and a mesh cover. Some axial flow fans are additionally provided with a diffuser at the air outlet of the wind guide cylinder. The diffuser is generally a conical diffusion cylinder. The diffusion cylinder can be used to reduce the air outlet velocity and reduce the dynamic pressure loss of the fan air outlet, thereby improving the effective static pressure of the fan. The addition of the diffuser increases the length of the axial flow fan. Therefore, some axial flow fans are designed to have a diffusion cylinder shape at the air outlet end of the wind guide cylinder. Meanwhile, a conical flow collecting cylinder structure is designed at the inlet of the wind guide cylinder. Therefore, the middle part of the wind guide cylinder is required to be cylindrical, and the two ends are required to be conical, which makes the processing of the wind guide cylinder more troublesome. Furthermore, some people propose not to process the diffusion structure on the wind guide cylinder, but to combine the diffusion structure and the mesh cover together as one part to realize the diffusion and protection functions of the mesh cover, and to facilitate the processing of the wind guide cylinder and the assembly of the whole machine. Therefore, it is necessary to design an axial flow fan with the above-mentioned structure. SUMMARY

[0003] The utility model discloses a novel axial flow fan with diffusion-shaped mesh cover, which has a mesh cover with diffusion and protection functions on the axial flow fan, and can facilitate the manufacturing and assembly of the axial flow fan.

[0004] A novel axial flow fan with diffusion-shaped mesh cover, comprising a wind guide cylinder, a rectangular panel is formed at the lower end of the wind guide cylinder, and an outwardly folded connecting flange is formed at the upper end of the wind guide cylinder. A motor and an impeller are inserted into the wind guide cylinder. The impeller is fixedly connected to the shaft of the motor. A conical diffusion mesh cover is sleeved on the upper part of the motor extending out of the wind guide cylinder. A plurality of motor supports are inserted into the diffusion mesh cover. The motor is fixedly connected to the wind guide cylinder through the motor supports.

[0005] A plurality of muscle rods are arranged above the motor and diverge from each other. The outer end of the muscle rod is bent to form an obliquely arranged connecting rod. The lower end of the connecting rod is bent to form a circular annular connecting lug. The connecting lug is fixedly connected to the connecting flange of the wind guide cylinder through a first bolt assembly. A plurality of vertically arranged diffusion mesh rings are inserted into the connecting rod of the diffusion mesh cover. A plurality of horizontally arranged protection mesh rings are fixedly connected to the muscle rod of the diffusion mesh cover.

[0006] The motor support comprises an inner support rod arranged obliquely, the inner end of the inner support rod is fixed to the shell of the motor, the outer end of the inner support rod is bent to form a horizontal middle support rod, the outer end of the middle support rod is bent to form an outer support rod arranged obliquely, the lower end of the outer support rod abuts against the connecting flange of the air duct and is bent to form an ear plate, and the ear plate is fixed to the connecting flange of the air duct through a second bolt assembly; and the protective mesh ring abuts against the middle support rod of the motor support.

[0007] Preferably, the central axis of the diffusion mesh ring, the central axis of the protective mesh ring and the central axis of the air duct are on the same straight line; the rib rods and the connecting rods are uniformly distributed in a ring shape around the central axis of the air duct.

[0008] Preferably, the diameter of the diffusion mesh ring gradually increases from bottom to top, and the spacing between adjacent diffusion mesh rings is consistent; the diameter of the protective mesh ring gradually decreases from outside to inside.

[0009] Preferably, the central axis of the air duct, the central axis of the motor and the central axis of the impeller coincide.

[0010] Preferably, the motor support is provided with at least three groups, and the motor supports are located above the air duct and are arranged in a spiral around the central axis of the motor.

[0011] Preferably, the rib rods, the diffusion mesh rings and the protective mesh rings of the diffusion mesh cover are all made of round steel, and the diameters of the round steel used for the diffusion mesh rings and the protective mesh rings are smaller than the diameter of the round steel used for the rib rods.

[0012] The shaft flow fan has the advantages that:

[0013] The shaft flow fan has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0015] Fig. 2 It is a front view structure schematic view of the utility model;

[0016] Fig. 3 It is a top view structure schematic view of the utility model without diffusion mesh cover.

[0017] In the figure: 1, air duct; 11, panel; 12, connecting flange; 2, motor; 3, motor support; 31, inner support rod; 33, middle support rod; 33, outer support rod; 4, impeller; 5, second bolt assembly; 6, diffusion mesh cover; 61, rib rod; 611, connecting rod; 612, connecting lug; 62, diffusion mesh ring; 63, protective mesh ring; 7, first bolt assembly. DETAILED DESCRIPTION

[0018] Embodiment: see Figs. 1 to 3 As shown in the figure, a new axial flow fan with a diffusion mesh cover, comprising an air duct 1, the lower end of the air duct 1 is shaped into a rectangular panel 11, the upper end is shaped into an outwardly folded connecting flange 12, a motor 2 and an impeller 4 are inserted into the air duct 1, the impeller 4 is fixedly connected to the rotating shaft of the motor 2, the upper part of the motor 2 protruding out of the air duct 1 is sleeved with a conical diffusion mesh cover 6, a plurality of motor supports 3 are inserted into the diffusion mesh cover 6, the motor 2 is fixedly connected to the air duct 1 through the motor supports 3;

[0019] A plurality of rib rods 61 are located above the motor 2 and are divergent, the outer end of the rib rod 61 is bent into an obliquely arranged connecting rod 611, the lower end of the connecting rod 611 is bent into a circular connecting lug 612, the connecting lug 612 is fixedly connected to the connecting flange 12 of the air duct 1 through a first bolt assembly 7; a plurality of vertically arranged diffusion mesh rings 62 are inserted and fixed on the connecting rod 611 of the diffusion mesh cover 6, a plurality of horizontally arranged protective mesh rings 63 are fixedly connected to the rib rod 61 of the diffusion mesh cover 6;

[0020] The motor support 3 comprises an obliquely arranged inner support rod 31, the inner support rod 31 is inclined upward, the inner end of the inner support rod 31 is fixedly connected to the housing of the motor 2, the outer end of the inner support rod 31 is bent into a horizontal middle support rod 32, the outer end of the middle support rod 32 is bent into an obliquely arranged outer support rod 33, the outer support rod 33 is inclined downward, the lower end of the outer support rod 33 abuts against the connecting flange 12 of the air duct 1 and is bent into an ear plate 34, the ear plate 34 is fixedly connected to the connecting flange 12 of the air duct 1 through a second bolt assembly 5; the protective mesh ring 63 abuts against the middle support rod 32 of the motor support 3.

[0021] Preferably, the central axis of the diffusion mesh ring 62 on the diffusion mesh cover 6, the central axis of the protective mesh ring 63, and the central axis of the air duct 1 are all on the same straight line; the rib rod 61 and the connecting rod 611 are uniformly distributed in a ring shape around the central axis of the air duct 1.

[0022] The diameter of the diffusion mesh ring 62 gradually increases from bottom to top, the diffusion mesh ring 62 constitutes a conical diffusion structure outside the diffusion mesh cover 6, and the spacing between adjacent diffusion mesh rings 62 is consistent; the diameter of the protective mesh ring 63 gradually decreases from outside to inside, and the protective mesh ring 63 constitutes a protective mesh surface structure at the upper part of the diffusion mesh cover 6.

[0023] The central axis of the air guide cylinder 1, the central axis of the motor 2 and the central axis of the impeller 4 coincide; the inner support rod 31 and the outer support rod 33 of the motor support 3 are fixedly connected with reinforcing rings.

[0024] The motor support 3 is provided in at least three groups, and the motor supports 3 are arranged in a spiral around the central axis of the motor 2 and are located above the air guide cylinder 1; the motor 2 generates a rotary torque during operation, and the spiral arrangement of the motor supports 3 can resist the rotary torque to improve the overall strength of the axial flow fan.

[0025] The reinforcing bars 61, the diffusion mesh rings 62 and the protective mesh rings 63 of the diffusion mesh cover 6 are all made of round steel, the diameters of the round steel used for the diffusion mesh rings 62 and the protective mesh rings 63 are smaller than the diameter of the round steel used for the reinforcing bars 61, and the skeleton of the diffusion mesh cover 6 is the reinforcing bars 61, and the strength of the reinforcing bars 61 is greater than the strength of the diffusion mesh rings 62 and the protective mesh rings 63.

[0026] Working principle: the structure is a new type of axial flow fan with a diffusion mesh cover, and the main technical points of the new type of axial flow fan are located on the air guide cylinder 1, the diffusion mesh cover 6 and the motor support 3; the diffusion mesh cover 6 is composed of the reinforcing bars 61, the diffusion mesh rings 62 and the protective mesh rings 63, that is, the structure of the diffusion mesh cover 6 can constitute a diffuser and has a protective mesh structure itself.

[0027] Meanwhile, the diffusion mesh cover 6 can be installed on the upper part of the air guide cylinder 1 through a bolt assembly, and the installation is convenient; because the structure of the diffusion mesh cover 6 is a mesh structure, the protective strength of the diffusion mesh cover 6 is weaker than that of the protective mesh supported by a cylinder plate structure, so the structure of the motor support 3 is improved, and the motor support 3 can support the protective mesh part of the diffusion mesh cover 6 to improve the protective strength of the diffusion mesh cover 6; meanwhile, the motor support 3 can be installed on the upper part of the air guide cylinder 1 through a bolt assembly, and the installation is convenient.

[0028] The embodiments are used to illustratively explain the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, and therefore the protection scope of the utility model should be as listed in the claims of the utility model.

Claims

1. A novel axial flow fan with a diffuser-shaped net cover, comprising a guide cylinder (1), the lower end of which is shaped with a rectangular panel (11), and the upper end of which is shaped with an outwardly turned connecting flange (12), a motor (2) and an impeller (4) being inserted in the guide cylinder (1), the impeller (4) being fixed to the rotating shaft of the motor (2), characterized in that: The upper part of the motor (2) protrudes out of the air duct (1) and is sleeved with a conical diffusion mesh cover (6), a plurality of motor supports (3) are inserted in the diffusion mesh cover (6), and the motor (2) is fixedly connected with the air duct (1) through the motor supports (3); The diffusion mesh cover (6) is provided with a plurality of rib rods (61) located above the motor (2) and diverging, the outer end of the rib rod (61) is bent to form an obliquely arranged connecting rod (611), the lower end of the connecting rod (611) is bent to form a circular connecting lug (612), and the connecting lug (612) is fixedly connected to the connecting flange (12) of the air duct (1) through a first bolt assembly (7); a plurality of vertically distributed diffusion mesh rings (62) are inserted and fixed on the connecting rod (611) of the diffusion mesh cover (6), and a plurality of horizontally distributed protective mesh rings (63) are fixedly connected to the rib rod (61) of the diffusion mesh cover (6). The motor support (3) comprises an obliquely arranged inner support rod (31), the inner end of the inner support rod (31) is fixedly connected to the shell of the motor (2), the outer end is bent to form a horizontal middle support rod (32), the outer end of the middle support rod (32) is bent to form an obliquely arranged outer support rod (33), the lower end of the outer support rod (33) abuts against the connecting flange (12) of the air duct (1) and is bent to form an ear plate (34), and the ear plate (34) is fixedly connected to the connecting flange (12) of the air duct (1) through a second bolt assembly (5); the protective mesh ring (63) abuts against the middle support rod (32) of the motor support (3).

2. A novel axial flow fan with diffuser shaped shroud as claimed in claim 1 wherein: The central axis of the diffusion mesh ring (62) on the diffusion mesh cover (6), the central axis of the protective mesh ring (63), and the central axis of the air duct (1) are on the same straight line; the rib rod (61) and the connecting rod (611) are uniformly distributed in a ring shape around the central axis of the air duct (1).

3. A novel axial flow fan with diffuser shaped shroud as claimed in claim 2 wherein: The diameter of the diffusion mesh ring (62) gradually increases from bottom to top, and the spacing between adjacent diffusion mesh rings (62) is consistent; the diameter of the protective mesh ring (63) gradually decreases from outside to inside.

4. A novel axial flow fan with diffuser shaped shroud as claimed in claim 2 wherein: The central axis of the air duct (1), the central axis of the motor (2), and the central axis of the impeller (4) coincide.

5. A novel axial flow fan with diffuser shaped shroud as claimed in claim 4 wherein: The motor support (3) is provided with at least three groups, and the motor supports (3) are located above the air duct (1) and are arranged in a spiral around the central axis of the motor (2).

6. A novel axial flow fan with diffuser shaped shroud as claimed in claim 1 wherein: The rib rod (61), the diffusion mesh ring (62), and the protective mesh ring (63) of the diffusion mesh cover (6) all adopt round steel, and the diameter of the round steel used for the diffusion mesh ring (62) and the protective mesh ring (63) is smaller than the diameter of the round steel used for the rib rod (61).

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