Low-noise axial flow fan

Abstract

The utility model belongs to the field of industrial equipment, particularly relates to a low-noise axial flow fan, and provides the following scheme aiming at the problems of poor sound absorption effect and shortened service life caused by the problems that an existing sound absorption material is not firmly fixed, is easy to fall off and the like along with the influence of service time and environment. The fan comprises a fan shell and an outer ring arranged at one end of the outer wall of the fan shell, a servo motor is installed in the fan shell through a support, fan blades are fixedly arranged on an output shaft of the servo motor, and sound absorption cotton is pasted to the inner wall of the fan shell; the mesh enclosure is used for blocking foreign matters, and the sound-absorbing cotton used for reducing noise is supported and fixed through the fixing piece, so that the firmness of the sound-absorbing cotton is improved, the influence of the environment on the sound-absorbing cotton is reduced, and the service life is prolonged; through the mesh enclosure fixed by the mounting assembly, the problem of looseness of the nut can be avoided, so that noise caused by collision between the mesh enclosure and the nut is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial equipment, in particular to a low-noise axial flow fan. Background Art

[0002] In the industrial field, axial flow fans are widely used in ventilation, heat dissipation and other aspects in places such as factory workshops, warehouses, mines, etc. Traditional axial flow fans will generate relatively large noise during operation, which has an adverse impact on the surrounding environment and personnel. In order to reduce noise, the method of pasting sound-absorbing materials inside the fan housing is usually adopted;

[0003] However, due to the influence of service life and environment, the sound-absorbing materials will have problems such as insecure fixation and easy detachment, resulting in poor sound-absorbing effect and reduced service life. Moreover, the mesh covers provided at the air inlet end of the fan are mostly fixed by bolts, and will be affected by vibration during daily use, thus showing a loosening phenomenon. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems in the prior art that due to the influence of service life and environment, the sound-absorbing materials will have problems such as insecure fixation and easy detachment, resulting in poor sound-absorbing effect and reduced service life. Moreover, the mesh covers provided at the air inlet end of the fan are mostly fixed by bolts, and will be affected by vibration during daily use, thus showing a loosening phenomenon, and a low-noise axial flow fan is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A low-noise axial flow fan, including a fan housing and an outer ring provided at one end of the outer wall of the fan housing. A servo motor is installed inside the fan housing through a bracket. A fan blade is fixedly provided on the output shaft of the servo motor. A sound-absorbing cotton is pasted on the inner wall of the fan housing;

[0007] A mesh cover for blocking foreign objects, and the mesh cover is provided on the side of the fan housing close to the fan blade;

[0008] An installation component for installing the fan blade, and the installation component is provided on the outer wall of the mesh cover;

[0009] A fixing component for fixing the sound-absorbing cotton, and the fixing component is provided inside the fan housing. The fixing component includes a plurality of lower half rings and a plurality of upper half rings. A plurality of connecting rods are fixedly provided between the plurality of lower half rings and the plurality of upper half rings. Circular rods are provided at both ends of the plurality of lower half rings. One of the circular rods is rotatably provided and has a thread on its outer wall, and the other circular rods are fixedly provided. The two ends of the plurality of upper half rings are respectively sleeved on the outer walls of the plurality of circular rods, and one end of one of the upper half rings is matched with the thread.

[0010] In a possible design, the installation assembly includes a plurality of connecting rings, and the plurality of connecting rings are all fixedly arranged on the outer wall of the mesh cover. One side of the outer ring is provided with a plurality of mounting rods, and the plurality of mounting rods all slidably penetrate through the outer ring. The plurality of connecting rings are respectively sleeved on the outer walls of the plurality of mounting rods, and a nut is threadedly sleeved on the outer wall of the mounting rod, and the nut is located on the side of the connecting ring away from the outer ring.

[0011] In a possible design, the installation assembly further includes a plurality of compression springs, and the plurality of compression springs are respectively sleeved on the outer walls of the mounting rods. A fixing ring is fixedly arranged at one end of the mounting rod away from the nut, and two ends of the compression spring are respectively fixedly arranged on the sides of the fixing ring and the outer ring close to each other. A polygonal groove is formed on the side of the connecting ring close to the nut, and the polygonal groove is matched with the nut.

[0012] In a possible design, a rubber ring is fixedly arranged on the side of the connecting ring close to the outer ring, and the rubber ring is sleeved on the outer wall of the mounting rod.

[0013] In a possible design, the plurality of mounting rods and connecting rings are all arranged at equal intervals in a ring shape.

[0014] In a possible design, the sound-absorbing cotton is glass wool.

[0015] In this application, during specific use, first, the mesh cover is sleeved on the outer wall of the mounting rod through the connecting ring. Then, hold the fixing ring to make the mounting rod slide. After that, rotate and tighten the nut, and rotate the nut to the same angle as the connecting ring. Then release the fixing ring, and the mounting rod is reset through the compression spring. At this time, the nut will enter the interior of the polygonal groove, so as to prevent the nut from loosening due to vibration, thereby avoiding the noise caused by the collision between the mesh cover and the fan housing. Moreover, a rubber ring is arranged between the connecting ring and the outer ring, which can avoid hard contact between the two. After pasting the sound-absorbing cotton inside the fan housing, rotate the round rod with threads to drive the upper half ring to move, so that the lower half ring and the upper half ring press against the sound-absorbing cotton and fix it, thereby avoiding the phenomenon that the sound-absorbing cotton falls off due to the influence of humid environment and other factors.

[0016] In this utility model, for the low-noise axial-flow fan, through the installation assembly, the mesh cover can be installed at the air inlet end of the fan housing, and the fixing nut can be clamped into the interior of the polygonal groove to avoid loosening caused by vibration and prevent the noise generated by the collision between the fan housing and the mesh cover.

[0017] In this utility model, for the low-noise axial-flow fan, through the fixing member, the sound-absorbing cotton pasted on the inner wall of the fan housing can be supported, so as to avoid the phenomenon of falling off or insecure pasting due to environmental humidity and other reasons, thereby increasing its service life.

[0018] In the present utility model, during use, a sound-absorbing cotton for reducing noise is supported and fixed by a fixing member, thereby increasing its firmness, reducing the influence of the environment on it, and increasing its service life.

[0019] The wire mesh cover fixed by the installation component can avoid the loosening problem of the nut, thereby preventing the noise caused by the collision between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the low-noise axial flow fan proposed by the present utility model;

[0021] Figure 2 It is an exploded structure diagram of the low-noise axial flow fan proposed by the present utility model;

[0022] Figure 3 For the present utility model Figure 2 It is an enlarged structure diagram of part A in the present utility model;

[0023] Figure 4 It is a rear view structure diagram of the base of the low-noise axial flow fan proposed by the present utility model.

[0024] In the figure: 1, fan housing; 2, outer ring; 3, servo motor; 4, fan blade; 5, wire mesh cover; 6, nut; 7, polygonal groove; 8, connecting ring; 9, rubber ring; 10, mounting rod; 11, compression spring; 12, fixing ring; 13, lower half ring; 14, round rod; 15, upper half ring; 16, thread; 17, connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0026] Embodiment 1

[0027] Referring to Figure 1 , a low-noise axial flow fan, which is used in the field of industrial equipment, includes: a fan housing 1, an outer ring 2, a servo motor 3, a fan blade 4, a wire mesh cover 5, and an installation component, etc. The fan housing 1 is the main structure of the axial flow fan, and a servo motor 3 is installed inside it through a bracket. The output shaft of the servo motor 3 is fixedly provided with a fan blade 4 for generating air flow. In order to reduce noise, a sound-absorbing cotton is pasted on the inner wall of the fan housing 1, and this sound-absorbing cotton is preferably glass wool, which has good sound-absorbing effect.

[0028] The wire mesh cover 5 is arranged on one side of the fan housing 1 close to the fan blade 4, used to block foreign objects from entering the fan interior and protect the safe operation of the fan blade 4 and the servo motor 3. The installation component is used to install the fan blade 4 and at the same time realize the fixed connection between the wire mesh cover 5 and the fan housing 1.

[0029] Referring to Figure 2-3 , the installation component includes a plurality of connecting rings 8, and these connecting rings 8 are all fixedly arranged on the outer wall of the wire mesh cover 5. A plurality of mounting rods 10 are arranged on one side of the outer ring 2, and these mounting rods 10 all slide through the outer ring 2 and cooperate with the connecting rings 8. Specifically, a plurality of connecting rings 8 are respectively sleeved on the outer walls of a plurality of mounting rods 10, and a nut 6 is threadedly sleeved on the outer wall of the mounting rod 10. The nut 6 is located on the side of the connecting ring 8 away from the outer ring 2 and is used to fix the connecting ring 8 and the mounting rod 10.

[0030] The installation component further includes a plurality of compression springs 11. These compression springs 11 are respectively sleeved on the outer walls of the mounting rods 10, and a fixing ring 12 is fixedly arranged at one end of the mounting rod 10 away from the nut 6. The two ends of the compression spring 11 are respectively fixedly arranged on the sides of the fixing ring 12 and the outer ring 2 close to each other. A polygonal groove 7 is formed on the side of the connecting ring 8 close to the nut 6, and the polygonal groove 7 cooperates with the nut 6. A rubber ring 9 is also fixedly arranged on the side of the connecting ring 8 close to the outer ring 2, and the rubber ring 9 is sleeved on the outer wall of the mounting rod 10.

[0031] Specifically, first, the wire mesh cover 5 is sleeved on the outer wall of the mounting rod 10 through the connecting ring 8. Then, hold down the fixing ring 12 to make the mounting rod 10 slide. Then, rotate and tighten the nut 6 and turn the nut 6 to the same angle as the connecting ring 8. Then, release the fixing ring 12, and the mounting rod 10 is reset by the compression spring 11. At this time, the nut 6 will enter the interior of the polygonal groove 7, so as to prevent the nut 6 from loosening due to vibration, thereby avoiding the noise caused by the collision between the wire mesh cover 5 and the fan housing 1. And a rubber ring 9 is arranged between the connecting ring 8 and the outer ring 2, which can avoid hard contact between the two.

[0032] Embodiment 2

[0033] Referring to Figure 4 , on the basis of Embodiment 1, an improvement is made: inside the fan housing 1, a fixing member for fixing the sound-absorbing cotton is further provided. The fixing member includes a plurality of lower half rings 13 and a plurality of upper half rings 15, and a plurality of connecting rods 17 are fixedly arranged between these lower half rings 13 and upper half rings 15. Round rods 14 are arranged at both ends of a plurality of lower half rings 13, and one of the round rods 14 is rotatably arranged and a thread 16 is arranged on its outer wall, and the other round rods 14 are fixedly arranged. Both ends of a plurality of upper half rings 15 are respectively sleeved on the outer walls of a plurality of round rods 14, and one end of one of the upper half rings 15 cooperates with the thread 16. By rotating the round rod 14, the tightening or loosening between the upper half ring 15 and the lower half ring 13 can be realized.

[0034] Specifically, after the sound-absorbing cotton is pasted inside the fan housing 1, the round rod 14 driving the thread 16 is rotated, thereby driving the upper half ring 15 to move, so that the lower half ring 13 and the upper half ring 15 abut against the sound-absorbing cotton and fix it, thus avoiding the phenomenon that the sound-absorbing cotton falls off due to the influence of environments such as humidity, thereby increasing its service life.

[0035] However, as is well known to those skilled in the art, the working principle and wiring method of the servo motor 3 are common knowledge, and they all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0036] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. Low-noise axial flow fan, characterized in that, Comprising: A fan housing (1) and an outer ring (2) provided at one end of the outer wall of the fan housing (1). A servo motor (3) is installed inside the fan housing (1) through a bracket. A fan blade (4) is fixedly provided on the output shaft of the servo motor (3). A sound-absorbing cotton is pasted on the inner wall of the fan housing (1); A mesh cover (5) for blocking foreign objects, and the mesh cover (5) is provided on the side of the fan housing (1) close to the fan blade (4); An installation assembly for installing the fan blade (4), and the installation assembly is provided on the outer wall of the mesh cover (5); A fixing member for fixing the sound-absorbing cotton. The fixing member is provided inside the fan housing (1). The fixing member includes a plurality of lower half rings (13) and a plurality of upper half rings (15). A plurality of connecting rods (17) are fixedly provided between the plurality of lower half rings (13) and the plurality of upper half rings (15). Circular rods (14) are provided at both ends of the plurality of lower half rings (13). One of the circular rods (14) is rotatably provided and a thread (16) is provided on its outer wall. The other circular rods (14) are fixedly provided. The two ends of the plurality of upper half rings (15) are respectively sleeved on the outer walls of the plurality of circular rods (14). One end of one of the upper half rings (15) is matched with the thread (16).

2. The low-noise axial flow fan according to claim 1, characterized in that, The installation assembly includes a plurality of connecting rings (8). The plurality of connecting rings (8) are all fixedly provided on the outer wall of the mesh cover (5). A plurality of installation rods (10) are provided on one side of the outer ring (2), and the plurality of installation rods (10) all slidably penetrate through the outer ring (2). The plurality of connecting rings (8) are respectively sleeved on the outer walls of the plurality of installation rods (10). A nut (6) is threadedly sleeved on the outer wall of the installation rod (10), and the nut (6) is located on the side of the connecting ring (8) away from the outer ring (2).

3. The axial flow fan with low noise according to claim 2, wherein The installation assembly further includes a plurality of compression springs (11). The plurality of compression springs (11) are respectively sleeved on the outer walls of the installation rods (10). A fixing ring (12) is fixedly provided at the end of the installation rod (10) away from the nut (6). The two ends of the compression spring (11) are respectively fixedly provided on the sides of the fixing ring (12) and the outer ring (2) close to each other. A polygonal groove (7) is opened on the side of the connecting ring (8) close to the nut (6), and the polygonal groove (7) is matched with the nut (6).

4. The low-noise axial flow fan according to claim 3, characterized in that, A rubber ring (9) is fixedly provided on the side of the connecting ring (8) close to the outer ring (2), and the rubber ring (9) is sleeved on the outer wall of the installation rod (10).

5. The axial flow fan with low noise according to claim 4, characterized in that, The plurality of installation rods (10) and the connecting rings (8) are all arranged at equal intervals in a ring shape.

6. The axial flow fan with low noise according to claim 1, characterized in that The sound-absorbing cotton is glass wool.

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