Low-noise axial flow fan

Abstract

The utility model relates to the technical field of axial flow fans, in particular to a low-noise axial flow fan which comprises an outer shell, a vibration reduction sleeve and an assembly hole. A vibration reduction sleeve is sleeved with the outer shell in a clearance fit mode, and the outer shell and the vibration reduction sleeve are further fixedly connected through bolts. The assembly holes are of an integrated structure and are formed in the upper portion and the lower portion of the inner wall of the vibration reduction sleeve, and the interior of each assembly hole is sleeved with a connecting block in a clearance fit mode. A fan barrel is welded to the inner end of a connecting block, and air holes are formed in the outer wall of the fan barrel in an integrated structure; the fan unit is fixedly installed in the middle of the interior of the fan barrel through bolts. And the noise reduction cotton is uniformly filled in the middle position between the vibration reduction sleeve and the fan barrel. Through structural improvement, the vibration and noise reduction device has the advantages of being remarkable in vibration and noise reduction effect, higher in practical performance, higher in practical value and the like, and therefore the problems and defects in the prior art and equipment are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow fans, and more specifically, to a low-noise axial flow fan. Background Art

[0002] Ordinary axial flow fans on the market can be used for ventilation in general factories, warehouses, offices, residences and other places. They can also be used in air coolers (air coolers), evaporators, condensers, etc., and their application value is quite wide.

[0003] After continuous research, the applicant found that common axial flow fans still have certain shortcomings during use. For example, the fan unit and the fan casing are both rigidly connected by metal. When the fan unit is running in the fan barrel, it is bound to generate some vibration and noise, which will then be transmitted to the outside through the fan casing, thereby affecting its use and reducing its practical performance.

[0004] In view of this, research and improvement are carried out on the existing problems, and a low-noise axial flow fan is provided, which aims to further improve the vibration and noise reduction effects by adding vibration-damping sleeves and silencer cotton, thereby achieving the purpose of solving the problem and improving practical value. Utility Model Content

[0005] The purpose of the utility model is to provide a low-noise axial flow fan to solve the problems and shortcomings raised in the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides a low-noise axial flow fan, which is achieved by the following specific technical means:

[0007] A low-noise axial flow fan comprises: an outer shell, a vibration-damping sleeve, an assembly hole, a connecting block, a fan barrel, an air vent, a fan unit, and sound-absorbing cotton; the interior of the outer shell is sleeved with a vibration-damping sleeve by a clearance fit, and the outer shell and the vibration-damping sleeve are fixedly connected by bolts; the assembly hole is an integrated structure and is opened at the upper and lower positions of the inner wall of the vibration-damping sleeve, and the interior of the assembly hole is sleeved with a connection block by a clearance fit; the fan barrel is welded to the inner end of the connection block, and the outer wall of the fan barrel is provided with an air vent in an integrated structure; the fan unit is fixedly installed in the middle position of the fan barrel by bolts; the sound-absorbing cotton is evenly filled in the middle position between the vibration-damping sleeve and the fan barrel.

[0008] As a further optimization of the technical solution, the vibration damping sleeve of the low-noise axial flow fan of the utility model is a cylindrical structure made of vibration damping rubber material, and at least two inverted "T"-shaped assembly holes are opened at the upper and lower positions of the inner wall of the vibration damping sleeve.

[0009] As a further optimization of the technical solution, the connection block of the low-noise axial flow fan of the utility model is in a "T" shape, and the connection block is symmetrically arranged in the upper and lower parts and is welded at least two places on the outer wall of the upper and lower parts of the fan cylinder.

[0010] As a further optimization of the technical solution, the utility model provides a low-noise axial flow fan, in which the fan cylinder is hoisted inside the vibration-damping sleeve through a connecting block.

[0011] As a further optimization of the technical solution, the air holes of the low-noise axial flow fan of the utility model are circular through holes, and multiple air holes are evenly opened on the outer wall of the fan barrel in a circular array.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] 1. The utility model discloses a low-noise axial flow fan, which can isolate the vibration and part of the noise generated by the fan unit through the design structure of connecting the outer shell and the fan cylinder by using a vibration-damping sleeve in conjunction with a connecting block, thereby playing the role of noise reduction and vibration reduction, and further improving the practical performance of the device.

[0014] 2. The utility model provides a low-noise axial flow fan. By opening a plurality of air holes on the fan barrel and arranging silencer cotton on the outside of the fan barrel, part of the noise generated by the fan unit can be absorbed by the silencer cotton through the air holes, thereby further improving the noise reduction effect and making it more practical.

[0015] 3. The utility model has significant vibration reduction and noise reduction effects through structural improvements on the above-mentioned device, making it more practical and valuable, thereby effectively solving the problems and shortcomings in the existing technology and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the axial structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the vibration damping sleeve of the utility model;

[0020] Figure 4 This is a schematic diagram of the fan cylinder structure of the utility model.

[0021] In the figure: outer shell 1, vibration reduction sleeve 2, assembly hole 3, connection block 4, fan cylinder 5, air vent 6, fan unit 7, silencer cotton 8. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figures 1 to 4 The utility model provides a specific technical implementation scheme of a low-noise axial flow fan:

[0024] A low-noise axial flow fan comprises: an outer shell 1, a vibration-damping sleeve 2, an assembly hole 3, a connecting block 4, a fan barrel 5, an air vent 6, a fan unit 7, and sound-absorbing cotton 8; the interior of the outer shell 1 is sleeved with the vibration-damping sleeve 2 by a clearance fit, and the outer shell 1 and the vibration-damping sleeve 2 are also fixedly connected by bolts; the assembly hole 3 is an integrated structure and is opened at the upper and lower positions of the inner wall of the vibration-damping sleeve 2, and the interior of the assembly hole 3 is sleeved with the connecting block 4 by a clearance fit; the fan barrel 5 is welded to the inner end of the connecting block 4, and the outer wall of the fan barrel 5 is provided with the air vent 6 in an integrated structure; the fan unit 7 is fixedly installed in the middle position of the fan barrel 5 by bolts; the sound-absorbing cotton 8 is evenly filled in the middle position between the vibration-damping sleeve 2 and the fan barrel 5.

[0025] Specifically, the vibration-damping sleeve 2 is a cylindrical structure made of vibration-damping rubber material, and at least two inverted "T"-shaped assembly holes 3 are provided at the upper and lower positions of the inner wall of the vibration-damping sleeve 2. The function of the vibration-damping sleeve 2 is to isolate the vibration between the outer shell 1 and the fan cylinder 5 to avoid the influence of vibration noise.

[0026] Specifically, the connecting block 4 is in a "T" shape, and the connecting block 4 is symmetrically arranged in the upper and lower parts and is welded at least at two places on the upper and lower outer walls of the fan cylinder 5. The connecting block 4 can be installed inside the assembly hole 3 and the vibration-damping sleeve 2 can be used to form a flexible connection design structure between it and the outer shell 1, thereby avoiding the influence of vibration noise caused by rigid connection.

[0027] Specifically, the fan cylinder 5 is hoisted inside the vibration-damping sleeve 2 through the connecting block 4, and there is a certain gap between the fan cylinder 5 and the vibration-damping sleeve 2 to avoid the transmission of vibration caused by direct connection.

[0028] Specifically, the air holes 6 are circular through holes, and multiple air holes 6 are evenly arranged on the outer wall of the fan barrel 5 in a circular array. The air holes 6 can pass through the wind noise generated by the fan unit 7 in the fan barrel 5 during operation and absorb it with the sound-absorbing cotton 8, thereby achieving the effect of reducing noise.

[0029] Specific implementation steps:

[0030] Working principle: The outer shell 1 is installed on a designated wall or other location. The vibration generated by the fan unit 7 during operation is attenuated between the vibration-damping sleeve 2 and the outer shell 1 to prevent the vibration from being transmitted to the outside. The wind noise is absorbed by the sound-absorbing cotton 8 through the air vents 6, thereby further reducing the noise and making the device more practical.

[0031] To sum up: this low-noise axial flow fan, through the design structure of connecting the outer shell and the fan barrel by using a vibration-damping sleeve and a connecting block, can isolate the vibration and part of the noise generated by the fan unit, and then play the function of noise reduction and vibration reduction, and further improve the practical performance of the device; by opening multiple air holes on the fan barrel and arranging sound-absorbing cotton on the outside of the fan barrel, part of the noise generated by the fan unit can be absorbed by the sound-absorbing cotton through the air holes, thereby further improving the noise reduction effect, making it more practical, and solving the problems existing in the prior art.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-noise axial flow fan, comprising: An outer shell (1), a vibration-damping sleeve (2), an assembly hole (3), a connecting block (4), a fan cylinder (5), an air vent (6), a fan unit (7), and a sound-absorbing cotton (8); characterized in that: the outer shell (1) is sleeved with a vibration-damping sleeve (2) by means of a clearance fit, and the outer shell (1) and the vibration-damping sleeve (2) are fixedly connected by bolts; the assembly hole (3) is an integrated structure and is opened at the upper and lower positions of the inner wall of the vibration-damping sleeve (2), and the inner part of the assembly hole (3) is sleeved with a connecting block (4) by means of a clearance fit; the fan cylinder (5) is welded to the inner end of the connecting block (4), and the outer wall of the fan cylinder (5) is provided with an air vent (6) in an integrated structure; the fan unit (7) is fixedly installed at a middle position in the fan cylinder (5) by means of bolts; and the sound-absorbing cotton (8) is evenly filled in a middle position between the vibration-damping sleeve (2) and the fan cylinder (5).

2. A low-noise axial flow fan according to claim 1, characterized in that: The vibration-damping sleeve (2) is a cylindrical structure made of vibration-damping rubber material, and at least two inverted "T"-shaped assembly holes (3) are provided at the upper and lower positions of the inner wall of the vibration-damping sleeve (2).

3. A low-noise axial flow fan according to claim 1, characterized in that: The connection block (4) is in a "T" shape, and the connection block (4) is symmetrically arranged up and down and is welded at least at two locations on the upper and lower outer walls of the fan cylinder (5).

4. A low-noise axial flow fan according to claim 1, characterized in that: The fan cylinder (5) is hoisted inside the vibration-damping sleeve (2) via a connecting block (4).

5. A low-noise axial flow fan according to claim 1, characterized in that: The air holes (6) are circular through holes, and a plurality of air holes (6) are evenly arranged on the outer wall of the fan cylinder (5) in a circular array.

Images