A noise reduction assembly for a high speed centrifugal blower

Abstract

The utility model discloses a kind of noise reduction components of high-speed centrifugal blower, it is related to centrifugal blower technical field.The utility model includes blower shell, the motor is fixedly installed in blower shell one end, the motor output end and located in the blower shell inner chamber fixedly installed impeller, the blower shell one end is communicated with air inlet pipe, the blower shell outer wall is communicated with air outlet pipe.The utility model passes through gas into air inlet pipe, flows through two conical barrels, two conical barrels form guiding to airflow, simultaneously, air flows through the second sound hole on conical barrel, sound wave is reflected after it and attacks the multiple first sound holes on sound-absorbing sheet, the preliminary attenuation of sound wave is realized by the synergic reflection effect of both, subsequently, remaining noise is isolated by a plurality of partitions, so that noise is reflected back and forth between adjacent partitions, further reduce energy, sound-absorbing cotton absorbs remaining noise, and then to weaken the aerodynamic noise of air intake stage.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal blower technology, and specifically relates to a noise reduction component for a high-speed centrifugal blower. Background Technology

[0002] High-speed centrifugal blowers are an important type of gas conveying equipment with wide applications in many fields. In urban sewage and industrial wastewater treatment projects, they provide sufficient oxygen for microorganisms, ensuring efficient sewage treatment. In the metallurgical and chemical industries, they are used for material conveying and gas supply in chemical reactions. In aquaculture, they are responsible for oxygenating the water and maintaining a good living environment for aquatic organisms. In pneumatic conveying, they enable efficient material transfer. In the flotation process in mining, they provide necessary wind support for flotation operations.

[0003] When the impeller rotates at high speed, its blades will generate strong disturbances to the surrounding gas, and the impurities contained in the gas will frequently come into contact with and collide with the impeller. This will not only aggravate the wear of the impeller, but also directly generate obvious impact noise. At the same time, when the gas enters the blower's air inlet, the sudden influx of airflow will create pressure fluctuations, which will cause air vibration and further aggravate the generation of noise.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a noise reduction component for a high-speed centrifugal blower to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a noise reduction component for a high-speed centrifugal blower, including a blower housing, a motor fixedly installed at one end of the blower housing, an impeller fixedly installed at the output end of the motor and located in the inner cavity of the blower housing, an air inlet pipe connected to one end of the blower housing, an air outlet pipe connected to the outer wall of the blower housing, and a magnetic ring fixedly installed at the end of the air inlet pipe away from the blower housing;

[0008] The magnetic ring is equipped with a dustproof mechanism, which includes a mounting ring and a dustproof net is fixedly installed inside the mounting ring.

[0009] The inner wall of the air inlet duct is equipped with a noise reduction mechanism, which includes a sound-absorbing plate. The sound-absorbing plate has multiple sets of first sound-absorbing holes inside. Several partitions are fixedly installed on the outer wall of the sound-absorbing plate. Sound-absorbing cotton is installed on the outer wall of the partitions. Two conical cylinders are installed in the inner cavity of the sound-absorbing plate with the central plane as the symmetrical plane. The two conical cylinders are arranged in a mirror image. Several second sound-absorbing holes are opened on the conical cylinders.

[0010] The blower casing is wrapped with a sound-absorbing layer, and several guide plates are fixedly installed on the inner wall of the air outlet pipe.

[0011] Furthermore, a support frame is fixedly installed at the bottom of the blower housing, and the support frame has several mounting holes.

[0012] Furthermore, one end of the air inlet pipe is provided with a placement groove, the magnetic ring is located in the placement groove, and one end of the air inlet pipe is also provided with a notch, the depth of which is greater than the thickness of the mounting ring.

[0013] Furthermore, the outer wall of the sound-absorbing cotton is in contact with the inner wall of the air inlet pipe, and multiple sets of the first sound-absorbing holes are distributed at intervals with several partitions.

[0014] Furthermore, the sound-absorbing layer is made of a porous material.

[0015] Furthermore, the mounting ring is made of galvanized iron.

[0016] This utility model has the following beneficial effects:

[0017] This invention involves the air entering the air intake pipe and flowing through two conical cylinders. The two conical cylinders guide the airflow, while the air flows through the second silencing holes on the conical cylinders. After being reflected, the sound waves rush towards multiple sets of first silencing holes on the silencing plate. The synergistic reflection of the two achieves the initial attenuation of the sound waves. Subsequently, the remaining noise is isolated by several partitions, causing the noise to reflect back and forth between adjacent partitions, further reducing the energy. The sound-absorbing cotton absorbs the remaining noise, thereby weakening the aerodynamic noise during the air intake stage.

[0018] This utility model's dustproof net intercepts impurities in the gas, preventing them from entering the blower's outer casing and colliding with the impeller along with the airflow, thus reducing impeller wear and impact noise. The magnetic connection between the magnetic ring and the mounting ring facilitates disassembly, cleaning, or replacement of the dustproof net, ensuring long-term filtration effectiveness.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the left side structure of this utility model;

[0023] Figure 3 This is a partial sectional view of the blower housing of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of the noise reduction mechanism of this utility model;

[0025] Figure 5 for Figure 4 Enlarged view at point B in the middle;

[0026] Figure 6 This is an overall structural diagram of the dustproof mechanism of this utility model;

[0027] Figure 7 for Figure 3 Enlarged view of point A in the middle.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Blower housing; 2. Motor; 3. Impeller; 4. Inlet duct; 401. Placement slot; 402. Notched slot; 5. Outlet duct; 6. Magnetic ring; 7. Dustproof mechanism; 701. Mounting ring; 702. Dustproof net; 8. Noise reduction mechanism; 801. Silencing plate; 802. First silencing hole; 803. Partition plate; 804. Sound-absorbing cotton; 805. Conical cylinder; 806. Second silencing hole; 9. Silencing layer; 11. Guide plate; 12. Support frame; 1201. Mounting hole. Detailed Implementation

[0030] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0031] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0032] Please see Figures 1-7 As shown, this utility model is a noise reduction component for a high-speed centrifugal blower, including a blower housing 1, a motor 2 fixedly installed at one end of the blower housing 1, an impeller 3 fixedly installed at the output end of the motor 2 and located in the inner cavity of the blower housing 1, an air inlet pipe 4 connected to one end of the blower housing 1, an air outlet pipe 5 connected to the outer wall of the blower housing 1, and a magnetic ring 6 fixedly installed at the end of the air inlet pipe 4 away from the blower housing 1.

[0033] A dustproof mechanism 7 is installed on the magnetic ring 6. The dustproof mechanism 7 includes a mounting ring 701, and a dustproof net 702 is fixedly installed inside the mounting ring 701.

[0034] The inner wall of the air inlet pipe 4 is equipped with a noise reduction mechanism 8, which includes a sound-absorbing plate 801. The sound-absorbing plate 801 has multiple sets of first sound-absorbing holes 802 inside. Several partitions 803 are fixedly installed on the outer wall of the sound-absorbing plate 801. Sound-absorbing cotton 804 is installed on the outer wall of the partitions 803. Two conical cylinders 805 are installed in the inner cavity of the sound-absorbing plate 801 with the central plane as the symmetrical plane. The two conical cylinders 805 are arranged in a mirror image. Several second sound-absorbing holes 806 are opened on the conical cylinders 805.

[0035] The blower housing 1 is wrapped with a sound-absorbing layer 9, and a number of guide plates 11 are fixedly installed on the inner wall of the air outlet pipe 5.

[0036] Motor 2 (model YVF2-180M-2) drives the impeller 3 inside the blower housing 1 to rotate at high speed, creating a negative pressure at the air inlet pipe 4. External gas enters the blower housing 1 through the dust filter 702. The mounting ring 701 is installed with the air inlet pipe 4 via a magnetic ring 6 (preferably a magnet). The dust filter 702 inside intercepts impurities in the gas, preventing impurities from entering the blower housing 1 with the airflow and colliding with the impeller 3, thereby reducing impeller 3 wear and impact noise. The magnetic connection between the magnetic ring 6 and the mounting ring 701 facilitates disassembly, cleaning, or replacement of the dust filter 702, ensuring long-term filtration effect.

[0037] After the filtered gas enters the air inlet pipe 4, it flows through two conical cylinders 805 arranged in a mirror image with the central plane as the symmetrical plane inside the silencer 801. The two conical cylinders 805 guide the airflow. At the same time, when the air flows through the second silencer hole 806 on the conical cylinder 805, the sound wave is reflected and rushes towards the multiple sets of first silencer holes 802 on the silencer 801. The sound wave is initially attenuated through the synergistic reflection of the two. Subsequently, the remaining noise continues to propagate through the first silencer hole 802 of the silencer 801. Several baffles 803 on the outer wall of the silencer 801 isolate the noise passing through the first silencer hole 802, causing the noise to reflect back and forth between adjacent baffles 803, further reducing the energy. The sound-absorbing cotton 804 on the outer wall of the baffle 803 absorbs the remaining noise, thereby weakening the aerodynamic noise during the air intake stage.

[0038] After the airflow enters the blower housing 1, it is accelerated and pressurized under the action of the impeller 3. The sound-absorbing layer 9 wrapped inside the blower housing 1 absorbs the noise generated by the impeller 3 during operation. Finally, the pressurized gas is discharged through the air outlet pipe 5. Several guide plates 11 on the inner wall of the air outlet pipe 5 guide the airflow to flow in an orderly manner and reduce the generation of turbulence.

[0039] In one embodiment, for the blower housing 1, a support frame 12 is fixedly installed at the bottom of the blower housing 1, and the support frame 12 is provided with a plurality of mounting holes 1201.

[0040] The support frame 12 supports the blower housing 1. When the blower needs to be installed, screws or other screws are used to pass through the mounting holes 1201 to install the support frame 12 to the required location.

[0041] In one embodiment, for the air inlet pipe 4, one end of the air inlet pipe 4 is provided with a placement groove 401, the magnetic ring 6 is located in the placement groove 401, and one end of the air inlet pipe 4 is also provided with a notch 402, the depth of the notch 402 is greater than the thickness of the mounting ring 701, and the mounting ring 701 is made of galvanized iron.

[0042] The mounting ring 701 is made of galvanized iron, allowing the magnetic ring 6 to attract it. The slot 401 on the air inlet duct 4 provides installation space for the magnetic ring 6, while the depth of the notch 402 is greater than the thickness of the mounting ring 701, providing an operating clearance for disassembling the mounting ring 701. When it is necessary to replace or clean the dust filter 702, workers can insert tools such as hard pieces into the notch 402 and use the space in the notch 402 to pry the mounting ring 701, thus applying external force to overcome the magnetic ring 6's attraction to the mounting ring 701. The magnetic force of the magnetic ring 701 separates one side of the mounting ring 701 from the magnetic ring 6, allowing the old mounting ring 701 and dustproof net 702 to be removed from the magnetic ring 6. The dustproof net 702 can then be cleaned with a high-pressure water gun or a brush. Alternatively, a new mounting ring 701 and dustproof net 702 can be directly replaced. When installing the new mounting ring 701 and dustproof net 702, simply align the mounting ring 701 with the magnetic ring 6, and the magnetic force of the magnetic ring 6 will quickly and easily achieve the desired fixation. The operation is convenient and efficient.

[0043] In one embodiment, for the sound-absorbing cotton 804, the outer wall of the sound-absorbing cotton 804 is in contact with the inner wall of the air inlet pipe 4, and multiple sets of the first sound-absorbing holes 802 and several partitions 803 are distributed at intervals.

[0044] Each group of first silencing holes 802 is correspondingly set in the area between two adjacent partitions 803. When noise propagates to the outside of the silencing plate 801 through the first silencing holes 802, it can divide the noise transmitted from different groups of first silencing holes 802 into independent spatial propagation, realizing the individual isolation of each group of noise. Each isolated group of noise will be confined to the space between the corresponding adjacent partitions 803, and cannot be superimposed with the noise from other areas. The noise is constantly reflected back and forth on the surface of the two partitions 803. During the reflection process, the noise can be gradually consumed due to friction with the partitions 803 and the surrounding air, thereby reducing the energy of each group of noise and further enhancing the noise reduction effect of the intake section.

[0045] In one embodiment, the sound-absorbing layer 9 is a porous material component.

[0046] The sound-absorbing layer 9 is made of materials such as plastic foam. The sound-absorbing layer 9 effectively absorbs the noise generated by the impeller 3 during operation and reduces the transmission of noise to the outside of the blower housing 1.

[0047] Working principle: Motor 2 drives impeller 3 to rotate at high speed, creating negative pressure at air inlet pipe 4. External gas enters blower housing 1 through dust filter 702. Dust filter 702 intercepts impurities in the gas. When it is necessary to replace or clean dust filter 702, the operator inserts a hard plate or other tool into the notch 402 to pry the mounting ring 701, causing one side of the mounting ring 701 to separate from the magnetic ring 6. Then, the old mounting ring 701 and dust filter 702 can be removed. When installing the new mounting ring 701 and dust filter 702, simply align the mounting ring 701 with the magnetic ring 6 and use the magnetic force of the magnetic ring 6 to quickly complete the adsorption and fixation.

[0048] After the filtered gas enters the air inlet pipe 4, it flows through two conical cylinders 805 arranged in a mirror image with the central plane as the symmetrical plane inside the silencer 801. The two conical cylinders 805 guide the airflow. At the same time, when the air flows through the second silencer hole 806 on the conical cylinder 805, the sound wave is reflected and rushes towards the multiple sets of first silencer holes 802 on the silencer 801. The sound wave is initially attenuated through the synergistic reflection of the two. Subsequently, the remaining noise continues to propagate through the first silencer hole 802 of the silencer 801. Several baffles 803 on the outer wall of the silencer 801 isolate the noise passing through the first silencer hole 802, causing the noise to reflect back and forth between adjacent baffles 803, further reducing the energy. The sound-absorbing cotton 804 on the outer wall of the baffle 803 absorbs the remaining noise, thereby weakening the aerodynamic noise during the air intake stage.

[0049] After the airflow enters the blower casing 1, it is accelerated and pressurized under the action of the impeller 3. The sound-absorbing layer 9 effectively absorbs the noise generated by the impeller 3 during operation. Finally, the pressurized gas is discharged through the air outlet pipe 5. Several guide plates 11 on the inner wall of the air outlet pipe 5 guide the airflow to flow in an orderly manner and reduce the generation of turbulence.

[0050] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A noise reduction component for a high-speed centrifugal blower, comprising a blower housing (1), a motor (2) fixedly mounted at one end of the blower housing (1), an impeller (3) fixedly mounted at the output end of the motor (2) and within the inner cavity of the blower housing (1), an air inlet pipe (4) connected to one end of the blower housing (1), and an air outlet pipe (5) connected to the outer wall of the blower housing (1), characterized in that: A magnetic ring (6) is fixedly installed at the end of the air inlet pipe (4) away from the blower housing (1); A dustproof mechanism (7) is installed on the magnetic ring (6). The dustproof mechanism (7) includes a mounting ring (701), and a dustproof net (702) is fixedly installed inside the mounting ring (701). The inner wall of the air inlet pipe (4) is equipped with a noise reduction mechanism (8). The noise reduction mechanism (8) includes a sound-absorbing plate (801). The sound-absorbing plate (801) has multiple sets of first sound-absorbing holes (802) inside. Several partitions (803) are fixedly installed on the outer wall of the sound-absorbing plate (801). Sound-absorbing cotton (804) is installed on the outer wall of the partitions (803). Two conical cylinders (805) are installed in the inner cavity of the sound-absorbing plate (801) with the middle plane as the symmetrical plane. The two conical cylinders (805) are arranged in a mirror image. Several second sound-absorbing holes (806) are opened on the conical cylinders (805). The blower housing (1) is wrapped with a sound-absorbing layer (9), and several guide plates (11) are fixedly installed on the inner wall of the air outlet pipe (5).

2. The noise reduction component for a high-speed centrifugal blower according to claim 1, characterized in that, A support frame (12) is fixedly installed at the bottom of the blower housing (1), and the support frame (12) has several mounting holes (1201).

3. The noise reduction component for a high-speed centrifugal blower according to claim 1, characterized in that, The air inlet pipe (4) has a placement groove (401) at one end, and the magnetic ring (6) is located in the placement groove (401). The air inlet pipe (4) also has a notch (402) at one end, and the depth of the notch (402) is greater than the thickness of the mounting ring (701).

4. The noise reduction component for a high-speed centrifugal blower according to claim 1, characterized in that, The outer wall of the sound-absorbing cotton (804) is in contact with the inner wall of the air inlet pipe (4), and multiple sets of the first sound-absorbing holes (802) and several partitions (803) are distributed at intervals.

5. The noise reduction component for a high-speed centrifugal blower according to claim 1, characterized in that, The sound-absorbing layer (9) is made of a porous material.

6. The noise reduction component for a high-speed centrifugal blower according to claim 1, characterized in that, The mounting ring (701) is made of galvanized iron.

Images