Fan silencer

Abstract

The utility model discloses a fan silencer which comprises a straight barrel type silencer and a disc type silencer, the disc type silencer is assembled outside the straight barrel type silencer, and the straight barrel type silencer comprises a straight barrel shell. A cylindrical metal net is assembled on the inner wall of the straight barrel shell, and the space between the cylindrical metal net and the straight barrel shell is filled with a sound absorption layer a. The outer side wall of the straight barrel shell is coaxially sleeved with an air volume adjusting barrel. Adjusting sliding ways are evenly formed in the outer wall of the air volume adjusting barrel at equal intervals along the axis of the air volume adjusting barrel. Supporting plates are evenly installed on the outer wall of the straight barrel shell at equal intervals along the axis of the straight barrel shell and installed in the adjusting sliding way. A positioning bolt is assembled on the support plate, and a butterfly nut is screwed outside the positioning bolt; the fan silencer is reasonable in structural design; the straight barrel and the disc type silencer are combined to form an annular labyrinth type air inlet channel, noise absorption is facilitated, the structure is compact, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of fan silencers, in particular to a fan silencer. Background Art

[0002] A fan is a piece of mechanical equipment widely used in industrial, commercial, and residential areas. Its main function is to generate airflow through rotating blades for ventilation, air exchange, cooling, dust removal, and other purposes. However, fans generate a certain amount of noise during operation. Fan noise is a complex and common problem with various causes. Among them, when air enters the fan from the suction port, the unstable and turbulent airflow generates aerodynamic noise, which is a significant noise source. It not only affects the performance of the equipment, but may also have adverse effects on the surrounding environment and personnel. Therefore, installing a silencer at the fan suction port has become the primary means of eliminating aerodynamic noise.

[0003] Existing fan silencers all adopt the resistive sound absorption and noise reduction principle which has a good effect on the broadband characteristics of medium and high frequencies. The resistive silencer uses the friction and viscous resistance of sound waves when propagating in porous sound-absorbing materials to convert sound energy into heat energy and dissipate it, thereby achieving the purpose of noise reduction. Among them, the circular straight tube silencer is the most common. It only has a layer of sound-absorbing material attached to the inner circumference of the tube wall. This type of silencer only has a certain noise reduction effect on medium and high frequency sound absorption, and has poor performance on low frequencies. In addition, the straight tube structure occupies a large area, so the existing technology needs to be improved. Utility Model Content

[0004] The purpose of the present utility model is to provide a fan muffler to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a fan muffler, comprising a straight-cylinder muffler and a disc-shaped muffler, wherein the disc-shaped muffler is assembled on the outside of the straight-cylinder muffler, and the straight-cylinder muffler comprises a straight-cylinder shell;

[0006] The inner wall of the straight cylindrical shell is equipped with a cylindrical metal mesh, and the space between the cylindrical metal mesh and the straight cylindrical shell is filled with a sound absorbing layer a;

[0007] An air volume regulating cylinder is coaxially sleeved on the outer wall of the straight cylindrical shell, and regulating slideways are evenly and equidistantly provided on the outer wall of the air volume regulating cylinder along its axis;

[0008] The outer wall of the straight cylindrical shell is evenly and equidistantly mounted with support plates along its axis, and the support plates are mounted in the adjustment slideway;

[0009] The support plate is equipped with a positioning bolt, and the outer portion of the positioning bolt is threaded with a butterfly nut;

[0010] The disc-type silencer includes a disc shell, the inner side of the disc shell is equipped with a conical metal mesh, and a sound absorbing layer b is filled between the conical metal mesh and the disc shell;

[0011] Fasteners are installed between the sound absorbing layer b and the conical metal mesh.

[0012] Preferably, the fastener includes a fastening screw and an anti-slip screw, the outside of the fastening screw is threaded with a fastening nut, the bottom end of the fastening screw is provided with an anti-slip groove, the anti-slip screw is threaded in the anti-slip groove, the outside of the anti-slip screw is sleeved with an anti-slip cylinder, and the outer wall of the anti-slip cylinder is installed with three limiting columns, the three limiting columns are distributed in a triangular shape, and the inner wall of each limiting column is provided with a spiral groove that matches the fastening screw.

[0013] Preferably, an annular rotation groove is formed on the outer wall of the fastening nut, and the end of the limiting column is arranged in the annular rotation groove.

[0014] Preferably, a fixing ring is fixedly mounted on the outer upper end of the fastening screw, and an annular pressing sheet, a spring and an annular rubber sheet are sheathed on the circumferential surface of the fastening screw.

[0015] Preferably, the annular pressing plate is located on the upper side of the fixing ring, the spring is located on the upper side of the annular pressing plate, the annular rubber sheet is located on the lower side of the fixing ring, and an extrusion block is fixedly installed at the lower end edge of the annular pressing plate.

[0016] Preferably, the outside of the straight cylindrical shell is equipped with a flange.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the fan muffler has a reasonable structural design;

[0018] 1. The combination of straight tube and disc type silencer 2 forms an annular labyrinth-type air intake channel, which is more conducive to absorbing noise, with compact structure and easy installation.

[0019] 2. The air volume can be adjusted by axially moving the air volume regulating cylinder 105, so that the silencer can not only eliminate noise but also have the function of adjusting the air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the composition of this patent;

[0021] Figure 2 This is a schematic diagram of the straight-tube silencer of this patent;

[0022] Figure 3 This is a cross-sectional view of the straight-tube silencer of this patent;

[0023] Figure 4 This is a schematic diagram of the disc-type silencer of this patent;

[0024] Figure 5 This is a cross-sectional view of the patented disc-type muffler;

[0025] Figure 6 This is a schematic diagram of the fastener of this patent.

[0026] In the figure: 1. Straight-cylinder silencer; 101. Flange; 102. Straight-cylinder shell; 103. Sound-absorbing layer a; 104. Cylindrical metal mesh; 105. Air volume adjustment cylinder; 106. Adjustment slide; 107. Support plate; 108. Positioning bolt; 109. Butterfly nut; 2. Disc-type silencer; 201. Disc-type shell; 202. Conical metal mesh; 203. Sound-absorbing layer b; 204. Fastener; 3. Limiting column; 4. Spiral groove; 5. Spring; 6. Fastening screw; 7. Fastening nut; 8. Anti-slip groove; 9. Anti-slip cylinder; 10. Anti-slip screw; 11. Annular rotating groove; 12. Fixing ring; 13. Extrusion block; 14. Annular pressure plate; 15. Annular rubber sheet. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-6 , the utility model provides a technical solution:

[0029] In this technical solution, a fan silencer includes a straight-cylinder silencer 1 and a disc-shaped silencer 2, characterized in that: the disc-shaped silencer 2 is assembled on the outside of the straight-cylinder silencer 1, and the straight-cylinder silencer 1 includes a straight-cylinder shell 102; the inner wall of the straight-cylinder shell 102 is equipped with a cylindrical metal mesh 104, and the space between the cylindrical metal mesh 104 and the straight-cylinder shell 102 is filled with a sound-absorbing layer a103; the outer wall of the straight-cylinder shell 102 is coaxially sleeved with an air volume adjustment cylinder 105, and the outer wall of the air volume adjustment cylinder 105 is uniformly and equidistantly opened with adjustment slides 106 along its axis. The outer wall of the straight cylindrical housing 102 is evenly and equidistantly mounted with support plates 107 along its axis. The support plates 107 are mounted within the adjustment slide 106. Positioning bolts 108 are mounted on the support plates 107. Butterfly nuts 109 are screwed onto the outer surfaces of the positioning bolts 108. The disc-shaped muffler 2 includes a disc housing 201. A conical metal mesh 202 is mounted on the inner side of the disc housing 201. A sound-absorbing layer b203 is filled between the conical metal mesh 202 and the disc housing 201. A fastener 204 is mounted between the sound-absorbing layer b203 and the conical metal mesh 202.

[0030] In this technical solution, a straight-cylinder silencer 1 is included. The inner wall of the shell of the straight-cylinder silencer 1 is connected to a circle of cylindrical metal mesh 104. A sound-absorbing layer 103 is filled between the cylindrical metal mesh 104 and the straight-cylinder shell 102. The outer side of the straight-cylinder shell 102 is coaxially sleeved with an air volume regulating cylinder 105. The outer side of the straight-cylinder shell 102 is connected to a support plate 107 and a positioning bolt 108. The outer end of the support plate 107 is connected to the disc-shaped silencer 2. The positioning bolt 108 cooperates with a butterfly nut 109 to tighten the air volume regulating cylinder 105. The inner side of the shell of the disc-shaped silencer 2 is connected to a conical metal mesh 202. A sound-absorbing layer b203 is filled between the conical metal mesh 202 and the disc-shaped silencer 2, and is fastened by a bolt 204. The material of the sound-absorbing layer is ultrafine glass fiber.

[0031] In some technical solutions, the fastener 204 includes a fastening screw 6 and an anti-slip screw 10, the outside of the fastening screw 6 is threaded with a fastening nut 7, the bottom end of the fastening screw 6 is provided with an anti-slip groove 8, the anti-slip screw 10 is threaded in the anti-slip groove 8, the outside of the anti-slip screw 10 is sleeved with an anti-slip cylinder 9, and the outer wall of the anti-slip cylinder 9 is installed with three limiting columns 3, the three limiting columns 3 are distributed in a triangular shape, and the inner wall of each limiting column 3 is provided with a spiral groove 4 that cooperates with the fastening screw 6;

[0032] In this technical solution, the fastening screw 6 and the fastening nut 7 cooperate to realize the bolt in the prior art, and an anti-slip groove 8 is provided at the bottom end of the fastening screw 6, and the anti-slip screw 10 is screwed in. The three limiting columns 3 installed on the anti-slip cylinder 9 outside the anti-slip screw 10 support the fastening nut 7, thereby circumferentially limiting the fastening nut 7, and the spiral groove 3 on the limiting column 3 engages with the fastening screw 6, thereby limiting the anti-slip cylinder 9 and the anti-slip screw 10.

[0033] In some technical solutions, an annular rotation groove 11 is formed on the outer wall of the fastening nut 7 , and the end of the limiting column 3 is arranged in the annular rotation groove 11 .

[0034] In this technical solution, when the anti-slip screw 10 is screwed into the anti-slip groove 8, the anti-slip cylinder 9 will rotate accordingly, and when the limiting column 3 contacts the fastening nut 7, it can rotate in the annular groove 11 until it contacts the inner wall of the annular groove 11, thereby supporting the fastening nut 7 and performing circumferential limiting.

[0035] In some technical solutions, a fixing ring 12 is fixedly installed on the outer upper end of the fastening screw 6 , and an annular pressing plate 14 , a spring 5 and an annular rubber sheet 15 are sheathed on the circumferential surface of the fastening screw 6 .

[0036] In this technical solution, when the fastening screw 6 is rotated, the annular rubber sheet 15 slides upward due to the action of the screw hole. As the screw is further twisted, the annular rubber sheet 15 contacts the fixing ring 12. The annular rubber sheet 15 is deformed due to the action of the fixing ring 12, sealing the screw hole. The spring 5 is located on the upper side of the annular pressure sheet 14, so that the annular pressure sheet 14 is squeezed downward due to the action of the spring 5. The extrusion block 13 is squeezed downward due to the action of the annular pressure sheet 14, so that the extrusion block 13 further squeezes the edge of the annular rubber sheet 15, thereby improving the sealing effect. The annular pressure sheet 14 is located on the upper side of the fixing ring 12, the spring 5 is located on the upper side of the annular pressure sheet 14, the annular rubber sheet 15 is located on the lower side of the fixing ring 12, and the extrusion block 13 is fixedly installed at the lower end edge of the annular pressure sheet 14.

[0037] In some technical solutions, a flange 101 is assembled on the outside of the straight cylindrical shell 102 .

[0038] In this technical solution, the sound device and the fan are connected by a flange 101, which facilitates the installation and disassembly of the silencer. The straight-cylinder silencer 1 and the disc-type silencer 2 form a ring-shaped maze-type air intake channel, so that the noise can be more fully refracted on the sound-absorbing layer, which can not only effectively eliminate medium and high-frequency noise, but also have a significant effect on eliminating low-frequency noise. An air volume adjustment cylinder 105 is coaxially provided on the outer side of the shell of the straight-cylinder silencer 1, and the air intake volume can be adjusted by axially moving the air volume adjustment cylinder 105.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0040] While the present invention has been described above with reference to exemplary embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the disclosed embodiments may be combined with one another in any manner. The omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A fan silencer, comprising a straight-tube silencer (1) and a disc-shaped silencer (2), characterized in that: The disc-shaped silencer (2) is assembled on the outside of the straight-cylinder silencer (1), and the straight-cylinder silencer (1) includes a straight-cylinder housing (102); The inner wall of the straight-cylinder shell (102) is equipped with a cylindrical metal mesh (104), and a sound-absorbing layer a (103) is filled between the cylindrical metal mesh (104) and the straight-cylinder shell (102); An air volume regulating cylinder (105) is coaxially sleeved on the outer wall of the straight cylindrical shell (102), and regulating slideways (106) are evenly and equidistantly formed on the outer wall of the air volume regulating cylinder (105) along its axis. The outer wall of the straight cylindrical housing (102) is evenly and equidistantly mounted with support plates (107) along its axis, and the support plates (107) are mounted in the adjustment slideway (106); The support plate (107) is equipped with a positioning bolt (108), and the outer portion of the positioning bolt (108) is screwed with a butterfly nut (109); The disc-shaped silencer (2) comprises a disc shell (201), the inner side of the disc shell (201) is equipped with a conical metal mesh (202), and a sound absorbing layer b (203) is filled between the conical metal mesh (202) and the disc shell (201); A fastener (204) is assembled between the sound absorbing layer b (203) and the conical metal mesh (202).

2. A fan muffler according to claim 1, characterized in that: The fastener (204) includes a fastening screw (6) and an anti-slipping screw (10), the outside of the fastening screw (6) is threaded with a fastening nut (7), the bottom end of the fastening screw (6) is provided with an anti-slipping screw groove (8), the anti-slipping screw (10) is threaded in the anti-slipping screw groove (8), the outside of the anti-slipping screw (10) is sleeved with an anti-slipping cylinder (9), and the outer wall of the anti-slipping cylinder (9) is installed with three limiting columns (3), the three limiting columns (3) are distributed in a triangular shape, and the inner wall of each limiting column (3) is provided with a spiral groove (4) that matches the fastening screw (6).

3. A fan muffler according to claim 2, characterized in that: An annular rotation groove (11) is provided on the outer wall of the fastening nut (7), and the end of the limiting column (3) is arranged in the annular rotation groove (11).

4. A fan muffler according to claim 2, characterized in that: A fixing ring (12) is fixedly mounted on the outer upper end of the fastening screw (6), and an annular pressing sheet (14), a spring (5) and an annular rubber sheet (15) are sheathed on the circumferential surface of the fastening screw (6).

5. A fan muffler according to claim 4, characterized in that: The annular pressing plate (14) is located on the upper side of the fixing ring (12), the spring (5) is located on the upper side of the annular pressing plate (14), the annular rubber sheet (15) is located on the lower side of the fixing ring (12), and an extrusion block (13) is fixedly installed at the lower end edge of the annular pressing plate (14).

6. The fan muffler according to claim 1, characterized in that: The outside of the straight cylindrical shell (102) is equipped with a flange (101).

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