Noise reduction structure of low-noise centrifugal fan box

Abstract

The utility model discloses a noise reduction structure of a low-noise centrifugal fan box, which structurally comprises a fixing bolt, a dustproof grating plate, an air outlet, a sound insulation and noise reduction worm mechanism, an air inlet turbine, a shock absorption protection pad, a fixing bottom plate, a supporting hydraulic rod, a protection support and a driving motor, according to the noise reduction structure of the low-noise centrifugal fan box, structurally, when the air inlet turbine is matched with the driving motor to drive in the sound insulation volute through the connecting shaft opening, noise generated in the internal driving process is preliminarily influenced by the sound insulation corrugated layer, and the overall internal noise can be reduced; and furthermore, air generated inside circulates through a ventilation pipe, and noise generated by air outlet can be further effectively reduced through a sound absorption sponge plate and a noise elimination honeycomb material in a matched mode.

Description

Technical Field

[0001] The utility model discloses a noise reduction structure of a low-noise centrifugal fan box, belonging to the technical field of centrifugal fans. Background Art

[0002] A centrifugal fan is a device that uses input mechanical energy to change the pressure and direction of airflow and discharge the gas. A centrifugal fan uses a high-speed rotating impeller to accelerate, decelerate and change the direction of the gas, converting kinetic energy into potential energy. Usually, the impeller of a centrifugal fan is composed of multiple blades of the same size and shape. However, the existing technology has poor protection measures for noise reduction during the operation of the fan, resulting in a high decibel of machine noise, which affects the surrounding environment. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a noise reduction structure for a low-noise centrifugal fan box to solve the problem that the prior art has poor protection measures for noise reduction during the operation of the fan, resulting in a large decibel of machine noise, which affects the surrounding environment.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a noise reduction structure of a low-noise centrifugal fan box, which structure includes fixing bolts, dustproof grille plates, air outlets, sound insulation and noise reduction volute mechanisms, air intake impellers, shock-absorbing pads, fixed base plates, supporting hydraulic rods, protective brackets, and drive motors. The lower end of the fixing bolts is connected to the upper end of the dustproof grille plates, the air outlet and the sound insulation and noise reduction volute mechanisms are an integrated structure, the air intake impellers are embedded and installed in the right end of the sound insulation and noise reduction volute mechanisms, the lower outer ring of the sound insulation and noise reduction volute mechanisms is fitted with the upper outer ring of the shock-absorbing pads, the lower end of the shock-absorbing pads is connected to the upper end of the supporting hydraulic rods, the lower end of the supporting hydraulic rods is welded to the upper end of the fixed base plates, the upper end of the protective brackets is fitted with the left end of the sound insulation and noise reduction volute mechanisms, and the left end of the sound insulation and noise reduction volute mechanisms is connected to the right end of the drive motor.

[0005] Furthermore, the sound insulation and noise reduction volute mechanism is composed of a sound insulation volute, a ventilation pipe, a sound insulation honeycomb material, a sound absorbing sponge board, a sound insulation corrugated layer, a flange, and a connecting shaft. The sound insulation volute and the ventilation pipe are an integrated structure, the left end of the sound absorbing sponge board is embedded and installed in the ventilation pipe, the sound absorbing sponge board and the sound insulation honeycomb material are an integrated structure, the inner ring of the sound insulation corrugated layer and the outer ring of the flange are on the same axis, and the flange and the connecting shaft are an integrated structure.

[0006] Furthermore, the inner side of the dustproof grille plate fits with the outer side of the air outlet.

[0007] Furthermore, the left end of the connecting shaft opening is connected to the right end of the driving motor.

[0008] Furthermore, the fixed base plate and the protective bracket are an integrated structure.

[0009] Furthermore, the protective bracket is made of stainless steel and has hardness.

[0010] Furthermore, the shock-absorbing pad is made of rubber and has shock-absorbing properties. Beneficial Effects

[0011] The utility model discloses a noise reduction structure of a low-noise centrifugal fan box. Structurally, when the air intake impeller cooperates with the driving motor to be driven inside the sound insulation volute through the connecting shaft, the noise generated during the internal driving process is initially affected by the sound insulation corrugated layer, which can reduce the overall internal noise. Further, the wind generated inside circulates through the ventilation pipe and passes through the sound-absorbing sponge board and cooperates with the sound-absorbing honeycomb material to effectively silence the noise generated by the air outlet and reduce the noise. The flange can effectively seal the right end of the sound insulation volute, thereby improving the noise reduction function of the fan during the driving process and protecting the surrounding noise environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0013] Figure 1 This is a schematic diagram of the structure of a noise reduction structure of a low-noise centrifugal fan box of the utility model;

[0014] Figure 2 This is a structural schematic diagram of a sound insulation and noise reduction cochlear mechanism of the utility model;

[0015] Figure 3 The utility model is a structural schematic diagram of a sound-absorbing sponge board structure.

[0016] In the figure: fixing bolts-1, dustproof grille plate-2, air outlet-3, sound insulation and noise reduction volute mechanism-4, air intake impeller-5, shock absorbing pad-6, fixing base plate-7, supporting hydraulic rod-8, protective bracket-9, driving motor-10, sound insulation volute-41, ventilation pipe-42, sound-absorbing honeycomb material-43, sound-absorbing sponge plate-44, sound insulation corrugated layer-45, flange-46, connecting shaft-47. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] See also Figure 1 , Figure 2 , Figure 3The utility model provides a technical solution for the noise reduction structure of a low-noise centrifugal fan box: its structure includes a fixing bolt 1, a dustproof grille plate 2, an air outlet 3, a sound insulation and noise reduction volute mechanism 4, an air intake impeller 5, a shock-absorbing pad 6, a fixed bottom plate 7, a supporting hydraulic rod 8, a protective bracket 9, and a driving motor 10. The lower end of the fixing bolt 1 is connected to the upper end of the dustproof grille plate 2, the air outlet 3 and the sound insulation and noise reduction volute mechanism 4 are an integrated structure, the air intake impeller 5 is embedded and installed in the right end of the sound insulation and noise reduction volute mechanism 4, the lower outer ring of the sound insulation and noise reduction volute mechanism 4 is fitted with the upper outer ring of the shock-absorbing pad 6, the lower end of the shock-absorbing pad 6 is connected to the upper end of the supporting hydraulic rod 8, the lower end of the supporting hydraulic rod 8 is welded to the upper end of the fixed bottom plate 7, the upper end of the protective bracket 9 is fitted with the left end of the sound insulation and noise reduction volute mechanism 4, and the left end of the sound insulation and noise reduction volute mechanism 4 is connected to the right end of the driving motor 10 The sound insulation and noise reduction volute mechanism 4 is composed of a sound insulation volute 41, a ventilation pipe 42, a sound-absorbing honeycomb material 43, a sound-absorbing sponge board 44, a sound insulation corrugated layer 45, a flange 46, and a connecting shaft 47. The sound volute 41 and the ventilation pipe 42 are an integrated structure. The left end of the sound-absorbing sponge board 44 is embedded and installed in the ventilation pipe 42. The sound-absorbing sponge board 44 and the sound-absorbing honeycomb material 43 are an integrated structure. The inner ring of the sound insulation corrugated layer 45 and the outer ring of the flange 46 are the same axis. The flange 46 and the connecting shaft 47 are an integrated structure. The inner side of the dustproof grille plate 2 is fitted with the outer side of the air outlet 3. The left end of the connecting shaft 47 is connected to the right end of the drive motor 10. The fixed bottom plate 7 and the protective bracket 9 are an integrated structure. The protective bracket 9 is made of stainless steel and has hardness. The shock-absorbing pad 6 is made of rubber and has shock-absorbing properties.

[0019] The flange 46 mentioned in this patent is referred to as flange, which is just a general term, usually referring to a metal body similar to a disk with several holes for fixing opened around it for connecting other things. It is widely used in machinery.

[0020] When in use, the air intake impeller 5 cooperates with the drive motor 10 to drive inside the sound insulation volute 41 through the connecting shaft 47, and the noise generated during the internal driving process is initially affected by the sound insulation corrugated layer 45, which can reduce the overall internal noise. The wind generated inside is further circulated through the ventilation pipe 42 and through the sound-absorbing sponge board 44 and cooperates with the sound-absorbing honeycomb material 43 to effectively silence the noise generated by the wind outlet. The flange 46 can effectively seal the right end of the sound insulation volute 41.

[0021] The utility model solves the problem that the prior art has poor protective measures for noise reduction during the operation of the fan, resulting in a large machine noise decibel, which affects the surrounding environment. The utility model combines the above-mentioned components with each other. Structurally, when the air intake impeller cooperates with the drive motor to be driven inside the sound insulation volute through the connecting shaft, the noise generated during the internal driving process is initially affected by the sound insulation corrugated layer, which can reduce the overall internal noise. Further, the wind generated inside circulates through the ventilation pipe and passes through the sound-absorbing sponge board and cooperates with the sound-absorbing honeycomb material to effectively silence the noise generated by the wind outlet and reduce the noise. The flange can effectively seal the right end of the sound insulation volute, thereby improving the noise reduction function of the fan during the driving process and protecting the surrounding noise environment.

[0022] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0023] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A noise reduction structure for a low-noise centrifugal fan box, characterized in that: The structure comprises a fixing bolt (1), a dustproof grille plate (2), an air outlet (3), a soundproof and noise-reducing volute mechanism (4), an air intake impeller (5), a shock-absorbing pad (6), a fixing base plate (7), a supporting hydraulic rod (8), a protective bracket (9), and a driving motor (10). The lower end of the fixing bolt (1) is connected to the upper end of the dustproof grille plate (2). The air outlet (3) and the soundproof and noise-reducing volute mechanism (4) are an integrated structure. The air intake impeller (5) is embedded in the fixing base plate (7). It is installed in the right end of the sound insulation and noise reduction worm mechanism (4), the lower outer ring of the sound insulation and noise reduction worm mechanism (4) is fitted with the upper outer ring of the shock absorbing pad (6), the lower end of the shock absorbing pad (6) is connected to the upper end of the supporting hydraulic rod (8), the lower end of the supporting hydraulic rod (8) is welded to the upper end of the fixed bottom plate (7), the upper end of the protective bracket (9) is fitted with the left end of the sound insulation and noise reduction worm mechanism (4), and the left end of the sound insulation and noise reduction worm mechanism (4) is connected to the right end of the driving motor (10).

2. The noise reduction structure of a low-noise centrifugal fan box according to claim 1, characterized in that: The sound insulation and noise reduction volute mechanism (4) is composed of a sound insulation volute (41), a ventilation pipe (42), a sound-absorbing honeycomb material (43), a sound-absorbing sponge plate (44), a sound insulation corrugated layer (45), a flange (46), and a connecting shaft opening (47); the sound insulation volute (41) and the ventilation pipe (42) are an integrated structure; the left end of the sound-absorbing sponge plate (44) is embedded and installed in the ventilation pipe (42); the sound-absorbing sponge plate (44) and the sound insulation honeycomb material (43) are an integrated structure; the inner ring of the sound insulation corrugated layer (45) and the outer ring of the flange (46) are coaxial; and the flange (46) and the connecting shaft opening (47) are an integrated structure.

3. The noise reduction structure of a low-noise centrifugal fan box according to claim 1, characterized in that: The inner side of the dustproof grille plate (2) fits the outer side of the air outlet (3).

4. The noise reduction structure of a low-noise centrifugal fan box according to claim 2, characterized in that: The left end of the connecting shaft opening (47) is connected to the right end of the driving motor (10).

5. The noise reduction structure of a low-noise centrifugal fan box according to claim 1, characterized in that: The fixed base plate (7) and the protective bracket (9) are an integrated structure.

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