Noise reduction device of air blower

Abstract

The utility model belongs to the technical field of noise reduction, and particularly discloses an air blower noise reduction device which comprises a volute bin, a noise reduction bin is arranged on the inner arc face of the volute bin, an air inlet hole is formed in the middle of the surface of one side of the volute bin, a resonance ring is arranged on one side of the outer arc face of the air inlet hole, and a connecting end is arranged in the middle of the outer arc face of the air inlet hole. The connecting end is fixedly connected with the volute bin, one side of the inner arc face of the connecting end is connected with a sound absorption ring, the outer arc face of the resonance ring is sleeved with the outer arc face of the sound absorption ring, the inner arc face of the volute bin is sleeved with a sound insulation ring, and a sound absorption strip is arranged in the middle of the inner arc face of the sound insulation ring. The noise generated when the air shuttles and flows in the air channel can be further absorbed and weakened by the sound absorption strips and the sound absorption rings, so that the noise reduction effect of the whole device is greatly improved, the operation acoustic environment of the device is optimized, and the noise generated in the operation process of the air blower is effectively controlled and improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction, in particular to a noise reduction device for a blower. Background Art

[0002] Blowers are extremely common equipment in industrial production, ventilation systems, and many engineering application fields. Their main function is to generate airflow through high-speed rotating impellers to achieve gas transportation, pressurization, and other operations. However, during the operation of the blower, a large amount of noise is inevitably generated.

[0003] Upon investigation, a Chinese utility model patent discloses a blower noise reduction device (publication number: CN 213298395 U). This device includes a blower frame, a blower placed within the frame, and noise-reducing composite panels mounted on the front, back, left, and right sides of the frame. The panels are composed of a sound-absorbing sponge board, a mesh Bakelite partition, a heat-resistant partition, and a Bakelite protective plate. The sound-absorbing sponge board is attached to the inside of the mesh Bakelite partition and faces the blower. The mesh Bakelite partition is attached to the inside of the heat-resistant partition, which in turn is attached to the inside of the Bakelite protective plate. This blower noise reduction device has a simple structure and is easy to manufacture. When the blower is turned on, the first layer of mesh Bakelite partition and sound-absorbing sponge board provides efficient sound absorption, followed by a second layer of Bakelite protective plate and heat-resistant partition for final sound insulation. The final noise level received by the operator is below 80dB, achieving excellent noise reduction.

[0004] The above-mentioned noise reduction measures have certain limitations when dealing with blower noise. For example, although the simple use of a soundproof cover can block the noise from propagating outward to a certain extent, it is not effective in dealing with internal reflected sound, which can easily lead to excessively high noise levels inside the soundproof cover, affecting the normal operation and service life of the equipment.

[0005] Therefore, the utility model provides a blower noise reduction device to solve the above problems. Utility Model Content

[0006] (1) Technical problems solved

[0007] The utility model provides a blower noise reduction device, aiming to solve the problems raised in the background technology.

[0008] (2) Technical solution

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: it includes a volute bin, the inner arc surface of the volute bin is provided with a noise reduction bin, an air inlet is provided in the middle of one side surface of the volute bin, a resonance ring is provided on one side of the outer arc surface of the air inlet, a connecting end is provided in the middle of the outer arc surface of the air inlet, the connecting end is fixedly connected to the volute bin, a sound-absorbing ring is connected to one side of the inner arc surface of the connecting end, the outer arc surface of the sound-absorbing ring is sleeved on the inner arc surface of the resonance ring, a sound insulation ring is sleeved on the inner arc surface of the volute bin, a sound-absorbing strip is provided in the middle of the inner arc surface of the sound insulation ring, a blast blade is movably connected to one side of the inner arc surface of the noise reduction bin, a ventilation hole is opened on one side of the outer arc surface of the sound insulation ring, the sound-absorbing ring is sleeved on the outer arc surface of the blast blade and corresponds to the sound insulation ring at the top.

[0010] As a preferred technical solution of the present application, a support frame is fixedly installed on the back side of one side of the volute bin by bolts, and folded edges are provided on both sides of the bottom of the support frame. The support frame is fixedly installed with rubber pads through the folded edges on both sides, and an air duct is provided between the bent end of the outer arc surface of the sound-absorbing ring and the protruding end of the sound-absorbing strip.

[0011] As a preferred technical solution of the present application, the inner arc surface of the resonance ring is movably sleeved with a dustproof component, and the dustproof component includes an inner sleeve that abuts against the inner arc surface of the resonance ring, the inner arc surface of the inner sleeve is provided with a clamping end, and the outer arc surface bottom of the inner sleeve is provided with a sealing portion.

[0012] As a preferred technical solution of the present application, one end of the one-section sealing portion abuts against the inner arc surface of the resonance ring, and one end of the outer arc surface of the inner sleeve is provided with a two-section sealing portion, and the outer arc surface of the two-section sealing portion is attached to the junction of the air inlet and the resonance ring.

[0013] As a preferred technical solution of the present application, the inner arc surface of the clamping end is movably clamped with a matching piece, and the middle part of the outer arc surface of the matching piece is provided with an adapter end, and the outer arc surface of the adapter end is movably clamped to the inner clamping end of the matching piece.

[0014] As a preferred technical solution of the present application, a through hole is provided in the middle of one side surface of the mating piece, the through hole and the volute chamber are in the same plane, the side of the mating piece away from the adapter end is provided with a flange portion, and the outer arc surface of the flange portion is provided with a bent edge on one side.

[0015] As a preferred technical solution of the present application, the bent edge on one side of the flange part fits into the port on one side of the air inlet, and a dustproof net is fixed on one side of the outer arc surface of the flange part by bolts, and one side of the dustproof net is adapted to the air inlet.

[0016] (3) Beneficial effects

[0017] 1. Through the dual combination of sound insulation ring and sound absorbing ring, the noise generated by the air flowing through the air duct will be further absorbed and weakened by the sound absorbing strip and the sound absorbing ring, thereby greatly improving the noise reduction effect of the entire device, optimizing the operating acoustic environment of the equipment, and effectively controlling and improving the noise generated by the blower during operation.

[0018] 2. Prevent dust from contacting these sound-absorbing and sound-insulating materials through dust-proof components, prevent dust from clogging the pores of the sound-absorbing materials, maintain their original performance, and ensure good noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall blowing structure of a blower noise reduction device;

[0020] Figure 2 A schematic diagram of the overall disassembled structure of the blower interior of a blower noise reduction device;

[0021] Figure 3 This is a schematic diagram of the internal structure cross-section of a blower noise reduction device;

[0022] Figure 4 This is a schematic diagram of the overall planar cross-section structure of a blower noise reduction device;

[0023] Figure 5 The figure is a structural schematic diagram of a blower noise reduction device.

[0024] In the picture:

[0025] 1. Volute chamber; 101. Noise reduction chamber; 2. Air inlet; 201. Resonance coil; 202. Connecting end; 3. Sound-absorbing coil; 4. Sound-isolating coil; 401. Sound-absorbing strip; 402. Ventilation hole; 5. Blower blade; 6. Support frame; 601. Rubber pad; 7. Dustproof component; 701. Inner kit; 702. First-stage sealing part; 703. Second-stage sealing part; 704. Fitting part; 705. Adapter end; 706. Flanged part; 707. Snap-on end; 8. Dustproof net. DETAILED DESCRIPTION

[0026] 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.

[0027] The utility model provides a blower noise reduction device, such as Figures 1 to 5As shown, it includes a volute bin 1, the inner arc surface of the volute bin 1 is provided with a noise reduction bin 101, an air inlet 2 is provided in the middle of one side surface of the volute bin 1, a resonance ring 201 is provided on one side of the outer arc surface of the air inlet 2, a connecting end 202 is provided in the middle of the outer arc surface of the air inlet 2, the connecting end 202 is fixedly connected to the volute bin 1, a sound absorbing ring 3 is connected to one side of the inner arc surface of the connecting end 202, the outer arc surface of the sound absorbing ring 3 is sleeved on the inner arc surface of the resonance ring 201, the inner arc surface of the volute bin 1 is sleeved with a sound insulation ring 4, and the middle of the inner arc surface of the sound insulation ring 4 is provided. There is a sound-absorbing strip 401, and a blast blade 5 is movably connected to one side of the inner arc surface of the noise reduction chamber 101. A ventilation hole 402 is provided on one side of the outer arc surface of the sound insulation ring 4. The sound-absorbing ring 3 is sleeved on the outer arc surface of the blast blade 5 and corresponds to the sound insulation ring 4 on the top. A support frame 6 is fixedly installed on the back side of the volute chamber 1 by bolts. Both sides of the bottom of the support frame 6 are provided with folded edges. The support frame 6 is fixedly installed with rubber pads 601 through the folded edges on both sides. An air duct is provided between the bent end of the outer arc surface of the sound-absorbing ring 3 and the protruding end of the sound-absorbing strip 401.

[0028] Under normal circumstances, the motor drives the blower blades 5 to rotate, and the blower blades 5 rotate at high speed inside the volute 1, so that the air in the volute 1 is stirred, and then, under the push of the blower blades 5, the air is thrown to the outer periphery of the volute 1 along the shape and rotation direction of the blades. The blower blades 5 form a strong airflow in the air, realizing the air transportation and pressurization functions. Therefore, when the high-speed airflow passes through the air inlet, impeller, volute and air outlet of the blower, due to the turbulence, impact, separation and other phenomena of the air flow, strong broadband noise will be generated. In order to effectively reduce noise and ensure the normal operation of the equipment, the sound-absorbing ring 3 is tightly fitted on the periphery of the blower blade 5. At the same time, an air duct is constructed between the periphery of the sound-absorbing ring 3 and the sound insulation ring 4. In this way, when the blower blades 5 rotate at high speed to promote air flow, the air can circulate normally through the air duct smoothly to ensure that the basic ventilation function of the blower is not affected, and the sound-absorbing coil 3 can efficiently absorb the vibration energy generated by the blower blades 5 during the rotation process and the noise caused thereby. Moreover, when the air flows through the air duct, the accompanying noise will be further absorbed and weakened by the sound-absorbing strips 401 and the sound-absorbing coil 3, thereby greatly improving the noise reduction effect of the entire device, optimizing the operating acoustic environment of the equipment, and effectively controlling and improving the noise generated by the blower during operation.

[0029] When air is sucked in from the air inlet 2, the resonance coil 201 located at one end of the air inlet 2 senses the changes in the airflow, and then produces a synchronous frequency vibration phenomenon with the flow of air, which can adjust the flow state of the inhaled air and optimize the uniformity and stability of the air entering the subsequent channels. Moreover, to a certain extent, it can also make preliminary interference with the possible noise through the interaction of its own vibration characteristics with the surrounding structures.

[0030] The inner arc surface of the resonance ring 201 is movably sleeved with a dustproof component 7, which includes an inner set 701 abutting against the inner arc surface of the resonance ring 201, and the inner arc surface of the inner set 701 is provided with a clamping end 707. The bottom of the outer arc surface of the inner set 701 is provided with a sealing portion 702, and one end of the sealing portion 702 abuts against the inner arc surface of the resonance ring 201. One end of the outer arc surface of the inner set 701 is provided with a two-section sealing portion 703. The outer arc surface of the two-section sealing portion 703 is attached to the junction of the air inlet 2 and the resonance ring 201. The inner arc surface of the clamping end 707 is movably clamped with a matching piece 704. An adapter end 705 is provided in the middle of the outer arc surface of the fitting 704, and the outer arc surface of the adapter end 705 is movably connected to the internal clamping end 707 of the fitting 704. A through hole is provided in the middle of the surface of one side of the fitting 704, and the through hole and the volute bin 1 are in the same plane. A flange portion 706 is provided on the side of the fitting 704 away from the adapter end 705, and a bent edge is provided on one side of the outer arc surface of the flange portion 706. The bent edge on one side of the flange portion 706 is fitted at one side port of the air inlet 2, and a dustproof net 8 is fixedly installed on one side of the outer arc surface of the flange portion 706 by bolts, and one side of the dustproof net 8 is adapted to the air inlet 2.

[0031] The interior of the air inlet 2 is provided with an inner kit 701, and the rear end of the inner kit 701 adopts an elastic structure design, and its initial diameter is larger than the inner diameter of the air inlet 2. When the inner kit 701 is inserted into the air inlet 2, the rear end elastic structure will be compressed first, and then expand under the action of the elastic restoring force, so that it is tightly and firmly attached to the interior of the air inlet 2 to form a connection. At the same time, the first sealing part 702 and the second sealing part 703 inside the inner kit 701 are both fitted on the inner wall of the air inlet 2, effectively preventing dust in the air from entering. In addition, the inner kit 701 is snapped into the front end matching piece 704 through the snap-in end 707. This connection method further enhances the stability of the inner kit 701 in the air inlet 2. The front end of the matching piece 704 is bent, so that it can better fit the periphery of the air inlet 2. The contours are adapted and fit tightly, further optimizing the overall sealing effect and connection stability. On this basis, a dustproof net 8 is firmly fixed to the outer end of the air inlet 2. The dustproof net 8 can effectively prevent external dust, impurities and other foreign objects from entering the air inlet 2. For the blower, if these dusts enter, they may accumulate on the surfaces of components such as the blast blade 5 and the volute. When dust accumulates on the surface of the blast blade 5, the aerodynamic shape of the blade will be changed, causing the flow state of the airflow on the surface of the blade to change, generating more turbulence and vortex noise. At the same time, if a large amount of dust adheres to the surface of these materials, it will block the pores of the sound-absorbing material. When the pores are blocked by dust, the sound-absorbing effect will be greatly reduced, thereby preventing dust from contacting these sound-absorbing and sound-insulating materials, maintaining their original performance, and ensuring a good noise reduction effect.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A blower noise reduction device, comprising a volute chamber (1), characterized in that: The inner arc surface of the volute bin (1) is provided with a noise reduction bin (101), an air inlet (2) is provided in the middle of one side surface of the volute bin (1), a resonance ring (201) is provided on one side of the outer arc surface of the air inlet (2), a connecting end (202) is provided in the middle of the outer arc surface of the air inlet (2), the connecting end (202) is fixedly connected to the volute bin (1), a sound absorbing ring (3) is connected to one side of the inner arc surface of the connecting end (202), and the outer arc of the sound absorbing ring (3) is provided. The surface is sleeved on the inner arc surface of the resonance ring (201), the inner arc surface of the volute chamber (1) is sleeved with a sound insulation ring (4), the middle part of the inner arc surface of the sound insulation ring (4) is provided with a sound absorbing strip (401), one side of the inner arc surface of the noise reduction chamber (101) is movably connected to a blast blade (5), one side of the outer arc surface of the sound insulation ring (4) is provided with a ventilation hole (402), the sound absorbing ring (3) is sleeved on the outer arc surface of the blast blade (5) and corresponds to the top sound insulation ring (4).

2. The blower noise reduction device according to claim 1, characterized in that: A support frame (6) is fixedly mounted on the back side of one side of the volute bin (1) by means of bolts, and folded edges are provided on both sides of the bottom of the support frame (6). A rubber pad (601) is fixedly mounted on the support frame (6) by means of the folded edges on both sides, and an air duct is provided between the bent end of the outer arc surface of the sound-absorbing ring (3) and the protruding end of the sound-absorbing strip (401).

3. The blower noise reduction device according to claim 1, characterized in that: The inner arc surface of the resonance ring (201) is movably sleeved with a dustproof component (7), the dustproof component (7) comprising an inner sleeve (701) abutting against the inner arc surface of the resonance ring (201), the inner arc surface of the inner sleeve (701) being provided with a clamping end (707), and the bottom of the outer arc surface of the inner sleeve (701) being provided with a sealing portion (702).

4. The blower noise reduction device according to claim 3, characterized in that: One end of the first-stage sealing portion (702) abuts against the inner arc surface of the resonance ring (201); one end of the outer arc surface of the inner sleeve (701) is provided with a second-stage sealing portion (703); the outer arc surface of the second-stage sealing portion (703) is fitted at the junction of the air inlet hole (2) and the resonance ring (201).

5. The blower noise reduction device according to claim 4, characterized in that: The inner arc surface of the clamping end (707) is movably clamped with a matching piece (704), and the middle part of the outer arc surface of the matching piece (704) is provided with an adapter end (705), and the outer arc surface of the adapter end (705) is movably clamped with the inner clamping end (707) of the matching piece (704).

6. The blower noise reduction device according to claim 5, characterized in that: A through hole is provided in the middle of one side surface of the fitting (704), and the through hole and the volute chamber (1) are in the same plane. A flange portion (706) is provided on the side of the fitting (704) away from the adapter end (705), and a curved edge is provided on one side of the outer arc surface of the flange portion (706).

7. The blower noise reduction device according to claim 6, characterized in that: The bent edge of one side of the flange portion (706) fits on a side port of the air inlet (2), and a dustproof net (8) is fixedly installed on one side of the outer arc surface of the flange portion (706) by bolts, and one side of the dustproof net (8) is adapted to the air inlet (2).

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