Detachable combined type three-dimensional flow fan silencing and filtering device

Abstract

The utility model relates to a detachable combined type three-dimensional flow fan silencing and filtering device which comprises a volute, a three-dimensional impeller is installed in the volute, an opening is formed in a front side plate of the volute, an air inlet box is fixed to the front side plate of the volute through an air inlet, and a detachable perforated plate is arranged in the air inlet box. A gap is formed between the perforated plate and the inner wall of the air inlet box to form a cavity, and a silencing material is arranged in the cavity. One end of the transmission shaft penetrates through the volute, the three-dimensional impeller, the air inlet and the air inlet box and is fixed to a fixing seat of the volute through a bearing seat, and the other end of the transmission shaft is connected with the power assembly through a belt wheel. The perforated plate and the silencing material are arranged in the air inlet box to reduce noise generated during airflow steering, meanwhile, the split structure is adopted to facilitate installation and maintenance, the bag type air filter is arranged to purify entering air, and the stability and efficiency of equipment operation are guaranteed. According to the design, the noise generated during operation of the fan is effectively reduced, the noise reduction structure is more compact, and the fan is suitable for application scenes with strict requirements for noise control.

Description

Technical Field

[0001] The utility model relates to the technical field of fan silencers, in particular to a detachable combined three-way flow fan silencer and filter device. Background Art

[0002] Fans are machines that transport gas and are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and other places. During actual operation, the fan's air inlet generates considerable noise, and a muffler is usually installed at the air inlet to reduce the noise.

[0003] In most cases, aerodynamic noise is the primary source of fan noise, which can be divided into discrete noise and random noise. Installing a silencer is a passive noise reduction measure, while using a high-efficiency impeller in the fan's aerodynamic design is an active noise reduction measure. Taking both into account can effectively reduce fan operating noise.

[0004] In the prior art, fan silencers are usually tubular or cylindrical, with a sound-absorbing structure arranged inside. A connecting flange is provided on the silencer. The silencer can be installed on the fan by fitting the connecting flange with the flange at the air inlet and then threadedly fastening it with bolts and nuts. However, when the fan inlet is an air intake box, the above-mentioned silencer cannot adapt to this structure. On the one hand, the air intake box itself is large in size. If a conventional tubular or cylindrical silencer is added to the inlet, the overall size of the fan will increase significantly. Secondly, the Chinese utility model patents with authorization numbers CN 221610267U and CN114837998A weld or set multiple guide silencers or silencers on the upper part of the air inlet of the air intake box, and the silencer will only have a certain effect at the guide silencer or silencer. Because the air intake box is an irregular rectangle, the overall size is wide at the top and narrow at the bottom. The airflow flows from top to bottom, and turns vertically to radially at the narrow part of the lower end of the air intake box. The drastic change in the flow direction of the airflow has a greater impact on the lower end wall of the cylinder, and the louder noise is also generated at the lower part of the air intake box.

[0005] Another disadvantage of conventional disc-type silencers is that they occupy the original air inlet area. Theoretically, the effective airflow area should be no less than the original cross-sectional area to avoid excessive flow velocity and exacerbated flow losses. Furthermore, due to the large overall size of the air inlet box, practical installation considerations must be considered regardless of whether a D-type or E-type structure is used. During actual fan operation, the airflow may also contain other media or dust. The accumulation of these media and dust can also affect the noise reduction effect, so dust removal at the air inlet box is also necessary. Utility Model Content

[0006] In order to solve the problems in the prior art of high noise during the transmission of fans with air intake boxes, dust in the working medium, and difficulty in installation due to the large size of the air intake box, the utility model proposes a detachable combined three-way flow fan silencer and filter device.

[0007] The utility model provides a detachable combined three-dimensional flow fan silencer and filter device, comprising a volute, a three-dimensional impeller installed inside the volute, an opening provided on the front side plate of the volute, an air intake box fixed to the front side plate of the volute through an air inlet, a detachable perforated plate provided inside the air intake box, a gap provided between the perforated plate and the inner wall of the air intake box to form a cavity, a sound-absorbing material is provided in the cavity, one end of the transmission shaft passes through the volute, the three-dimensional impeller, the air inlet, and the air intake box, and is fixed to the fixed seat of the volute through a bearing seat, and the other end is connected to the power component through a pulley.

[0008] As a preferred solution, the inner edge of the air inlet connected to the volute is inserted into the volute and does not interfere with the inlet of the three-dimensional impeller. The outer edge is fixed to the front side plate of the volute through a flange, and the other end connected to the air inlet box is fixedly connected to the air inlet box through a flange.

[0009] As a preferred solution, the perforated plate and the inner wall of the air intake box are detachably connected by a bolt group, and the bolts pass through the air intake box to fix the perforated plate to the inside of the air intake box. The bolts between the perforated plate and the air intake box are provided with a limiting structure that can be adjusted according to the sound-absorbing material to ensure that the distance between the perforated plate and the air intake box remains fixed.

[0010] As a preferred solution, a bag air filter for purifying air is provided at the air inlet of the air inlet box.

[0011] As a preferred solution, the air inlet box is an irregular rectangle, with a rectangular inlet at the upper end and a trapezoidal shape at the lower end that matches the volute fixing seat.

[0012] As a preferred solution, the air intake box is a split structure, with a flange structure provided at the junction of the upper end and the lower end, which are fixedly connected by bolts.

[0013] As a preferred solution, the volute is a split structure, including an upper volute and a lower volute, and a flange structure is provided at the junction of the upper and lower halves, which are connected by bolts.

[0014] As a preferred solution, a detachable perforated plate is respectively provided in the upper volute and the lower volute, a cavity is formed between the perforated plate and the inner walls of the upper volute and the lower volute, and a sound-absorbing material for eliminating noise is provided in the cavity.

[0015] As a preferred solution, the number of blades of the three-dimensional impeller is preferably 16.

[0016] The beneficial effects of the utility model are:

[0017] Based on the shortcomings of the existing technology, the utility model provides a detachable combined three-way flow fan silencer and filter device. By optimizing the structural design, the utility model has the following technical effects:

[0018] First, a detachable perforated plate is provided inside the air intake box, and a cavity is formed between the perforated plate and the inner wall of the air intake box through a bolt group and a limiting structure. Sound-absorbing material is provided in the cavity. The sound-absorbing material provided in the cavity does not occupy the air intake area, and can effectively eliminate the noise generated by the drastic change in the flow direction of the airflow when the airflow turns and violently impacts the wall. The noise

[0019] Secondly, the air intake box and volute are both split structures, and the upper and lower parts are detachably fixed together by flanges. The flange connection design makes on-site installation easier and faster, reducing installation time and cost. At the same time, when maintenance or replacement of parts is required, they can be quickly disassembled, effectively improving maintenance efficiency.

[0020] Third, removable perforated plates are respectively provided in the upper volute and the lower volute, and a cavity is formed between the perforated plate and the inner wall of the upper volute and the lower volute. The cavity is provided with a sound-absorbing material for eliminating noise, which greatly reduces the noise generated when the airflow hits the volute when the impeller runs at high speed. It is suitable for places with strict noise requirements; the impeller adopts three-dimensional twisted blades to effectively suppress secondary flow, which is more in line with the actual three-dimensional flow than the two-dimensional impeller, and has the advantages of high efficiency and low noise. Combined with the silencer, it can achieve both passive and active noise reduction of the fan, further reducing the fan noise.

[0021] Fourthly, the bag air filter installed at the inlet of the air intake box can efficiently filter dust and impurities in the air, ensuring the quality of air entering the system. It not only improves the stability and efficiency of equipment operation, but also meets the needs of places with strict requirements on environmental cleanliness, providing reliable guarantee for maintaining high-standard production conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 2 It is a partial enlarged view of the structure of part I in the utility model;

[0025] Figure 3 This is a schematic diagram of the air intake box structure in the utility model;

[0026] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0027] In the figure: 1. volute, 101. upper volute, 102. lower volute, 2. three-dimensional impeller, 3. air inlet, 4. air intake box, 5. transmission shaft, 6. bearing seat, 7. fixing seat, 8. perforated plate, 9. sound-absorbing material, 10. pulley, 11. bag air filter, 12. bolt assembly. DETAILED DESCRIPTION

[0028] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may also be beneficially combined in other embodiments.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons having ordinary skills in the field to which the present invention belongs. The words "one", "an", "the" and the like used in the specification and claims of the present utility model patent application do not express a quantitative limitation, but rather indicate the presence of at least one; words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.

[0030] Example 1

[0031] In order to more clearly describe the specific structure of the detachable combined three-way flow fan silencer and filter device, Figure 1 - Attachment Figure 4 Describe this embodiment:

[0032] As shown in the figure, this embodiment relates to a detachable, combined three-dimensional flow fan silencer and filter device. The device includes a volute 1, within which a three-dimensional impeller 2 is mounted. The front end panel of the volute 1 is provided with a hole for securing an air inlet 3, through which an air inlet box 4 is secured to the front end panel of the volute 1.

[0033] The air intake box 4 contains a removable perforated plate 8, which is fixed to the inner wall of the air intake box by a bolt group 12 and a limiting structure. The distance between the perforated plate 8 and the inner wall of the air intake box 4 is 8mm-25mm. A cavity is formed between the perforated plate 8 and the inner wall of the air intake box 4. This cavity is filled with sound-absorbing material 9 to offset the noise generated by the drastic change in the flow direction of the airflow flowing from top to bottom and turning vertically to radially at the narrow part of the lower end of the air intake box 4. The design of the bolt group 12 allows the position of the perforated plate 8 to be adjusted according to the thickness of the sound-absorbing material 9 to optimize the sound-absorbing effect. At the same time, the structural design does not occupy the air intake area.

[0034] Since the sound-absorbing material 9 is arranged inside the air intake box 4 and does not occupy the air intake area, compared with the existing technology that requires a sound-absorbing structure to be arranged at the air inlet of the air intake box, the air intake box 4 of this embodiment has a more compact structure and can be arranged in a relatively small space.

[0035] One end of the transmission shaft 5 passes through the volute 1, the three-dimensional impeller 2, the air inlet 3 and the air intake box 4, and is fixed to the fixed seat 7 on the volute 1 through the bearing seat 6. The other end of the transmission shaft 5 is connected to the power source through the pulley 10. The power source drives the three-dimensional impeller 2 to rotate, and the air flow is sucked in from the air intake box 4, passes through the air inlet 3, and is discharged from the air outlet of the volute 1.

[0036] Furthermore, the air intake box 4 and the volute 1 are both split structures, and the upper and lower parts are detachably fixed together by flanges, which makes on-site installation easier and faster, reduces installation time and cost, and can be quickly disassembled when maintenance or replacement of parts is required, effectively improving maintenance efficiency.

[0037] Furthermore, the impeller features a three-dimensional curved blade design with 16 blades. This design effectively suppresses secondary flow and better aligns with actual three-dimensional flow than traditional two-dimensional impellers, resulting in high efficiency and low noise. Combined with a silencer, this achieves both passive and active fan noise reduction, further reducing fan noise.

[0038] In this embodiment, the inner edge of the air inlet 3 connected to the volute 1 is inserted into the volute 1 and has no interference with the inlet of the three-dimensional impeller 2. The outer edge is fixed to the front side panel of the volute 1 by a flange, and the other end connected to the air inlet box 4 is fixedly connected to the air inlet box 4 through a flange. The inner and outer edges of the air inlet 3 wrap the air inlet of the outer volute 1, so that the airflow passes more smoothly and no unnecessary vortices are generated due to excessive unevenness of the edges.

[0039] Furthermore, the bag air filter 11 provided at the inlet of the air intake box 4 can efficiently filter dust and impurities in the air, ensuring the quality of air entering the system, which not only improves the stability and efficiency of equipment operation, but also meets the needs of places with strict requirements on environmental cleanliness, and provides reliable guarantee for maintaining high-standard production conditions.

[0040] During operation, the external air is preliminarily purified by the bag air filter 11 located on the top of the air intake box 4 to remove large particles of impurities and dust; then, the purified air enters through the air intake box 4, during which it encounters the perforated plate 8. A cavity with a sound-absorbing material 9 is formed between the perforated plate 8 and the inner wall of the air intake box 4, thereby absorbing the noise generated by the airflow; then, after passing through the perforated plate 8, the airflow continues to move downward along the guide path of the air intake box 4, and finally enters the interior of the volute through the air inlet 3, and the airflow is discharged from the volute outlet.

[0041] The impeller installed inside the volute is a three-dimensional impeller. The blades of the three-dimensional impeller 2 are three-dimensional curved surfaces with spatial distortion, with a total of 16 blades. This design is more in line with the actual three-dimensional airflow conditions than the traditional two-dimensional impeller, which improves the working efficiency of the fan and reduces the operating noise.

[0042] Example 2:

[0043] A detachable, combined, three-dimensional flow fan silencer and filter device includes a volute 1, within which a three-dimensional impeller 2 is mounted. The front end panel of the volute 1 is provided with a hole for securing an air inlet 3, through which an air inlet box 4 is secured to the front end panel of the volute 1.

[0044] The air intake box 4 contains a removable perforated plate 8, which is fixed to the inner wall of the air intake box by a bolt group 12 and a limiting structure. The distance between the perforated plate 8 and the inner wall of the air intake box 4 is 8mm-25mm. A cavity is formed between the perforated plate 8 and the inner wall of the air intake box 4. This cavity is filled with sound-absorbing material 9 to offset the noise generated by the drastic change in the flow direction of the airflow flowing from top to bottom and turning vertically to radially at the narrow part of the lower end of the air intake box 4. The design of the bolt group 12 allows the position of the perforated plate 8 to be adjusted according to the thickness of the sound-absorbing material 9 during production to optimize the sound-absorbing effect. At the same time, the structural design does not occupy the air intake area.

[0045] Since the sound-absorbing material 9 is arranged inside the air intake box 4 and does not occupy the air intake area, compared with the existing technology that requires a sound-absorbing structure to be arranged at the air inlet of the air intake box, the air intake box 4 of this embodiment has a more compact structure and can be arranged in a relatively small space.

[0046] One end of the transmission shaft 5 passes through the volute 1, the three-dimensional impeller 2, the air inlet 3 and the air intake box 4, and is fixed to the fixed seat 7 on the volute 1 through the bearing seat 6. The other end of the transmission shaft 5 is connected to the power source through the pulley 10. The power source drives the three-dimensional impeller 2 to rotate, and the air flow is sucked in from the air intake box 4, passes through the air inlet 3, and is discharged from the air outlet of the volute 1.

[0047] Furthermore, the air intake box 4 and the volute 1 are both split structures, and the upper and lower parts are detachably fixed together by flanges, which makes on-site installation easier and faster, reduces installation time and cost, and can be quickly disassembled when maintenance or replacement of parts is required, effectively improving maintenance efficiency.

[0048] Furthermore, the impeller features a three-dimensional curved blade design with 16 blades. This design effectively suppresses secondary flow and better aligns with actual three-dimensional flow than traditional two-dimensional impellers, resulting in high efficiency and low noise. Combined with a silencer, this achieves both passive and active fan noise reduction, further reducing fan noise.

[0049] In this embodiment, the inner edge of the air inlet 3 connected to the volute 1 is inserted into the volute 1 and has no interference with the inlet of the three-dimensional impeller 2. The outer edge is fixed to the front side panel of the volute 1 by a flange, and the other end connected to the air inlet box 4 is fixedly connected to the air inlet box 4 through a flange. The inner and outer edges of the air inlet 3 wrap the air inlet of the outer volute 1, so that the airflow passes more smoothly and no unnecessary vortices are generated due to excessive unevenness of the edges.

[0050] Furthermore, the bag air filter 11 provided at the inlet of the air intake box 4 can efficiently filter dust and impurities in the air, ensuring the quality of air entering the system, which not only improves the stability and efficiency of equipment operation, but also meets the needs of places with strict requirements on environmental cleanliness, and provides reliable guarantee for maintaining high-standard production conditions.

[0051] In this embodiment, a perforated plate is detachably provided in the upper volute 101 and the lower volute 102, respectively. The perforated plate is 8-25 mm away from the inner wall of the upper volute 101 and the lower volute 102 to form a cavity. A sound-absorbing material is provided in the cavity to eliminate noise, thereby greatly reducing the noise generated when the airflow hits the volute when the impeller runs at high speed.

[0052] During operation, the external air is preliminarily purified by the bag air filter 11 located on the top of the air intake box 4 to remove large particles of impurities and dust; then, the purified air enters through the air intake box 4, during which it encounters the perforated plate 8. A cavity with a sound-absorbing material 9 is formed between the perforated plate 8 and the inner wall of the air intake box 4, thereby absorbing the noise generated by the airflow; then, after passing through the perforated plate 8, the airflow continues to move downward along the guide path of the air intake box 4, and finally enters the interior of the volute through the air inlet 3, and the airflow is discharged from the volute outlet.

[0053] The impeller installed inside the volute is a three-dimensional impeller. The blades of the three-dimensional impeller 2 are three-dimensional curved surfaces with spatial distortion, with a total of 16 blades. This design is more in line with the actual three-dimensional airflow conditions than the traditional two-dimensional impeller, which improves the working efficiency of the fan and reduces the operating noise. At the same time, perforated plates and sound-absorbing materials are also set between the inner walls of the upper and lower halves of the volute to further reduce the noise generated when the high-speed airflow hits the volute, making the device adaptable to more application scenarios with strict requirements for noise control. In addition, the sound-absorbing design between the impeller and the volute is combined with the sound-absorbing measures at the air inlet box, realizing the combination of passive noise reduction and active noise reduction of the fan system, effectively improving the working environment of the entire system.

[0054] It should be noted that although the present invention has been described through the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and modifications to the present invention, and such changes and modifications shall fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A detachable combined three-way flow fan silencer and filter device, comprising a volute (1), characterized in that: A three-dimensional impeller (2) is installed inside the volute (1), an opening is provided on the front side plate of the volute, an air intake box (4) is fixed on the opening of the front side plate of the volute through an air inlet (3), a detachable perforated plate (8) is provided inside the air intake box (4), a gap is provided between the perforated plate (8) and the inner wall of the air intake box (4) to form a cavity, a sound-absorbing material (9) is provided in the cavity, one end of the transmission shaft (5) passes through the volute (1), the three-dimensional impeller (2), the air inlet (3), and the air intake box (4), and is fixed to the fixed seat (7) of the volute through a bearing seat (6), and the other end is connected to the power component through a pulley (10).

2. A detachable combined three-way flow fan noise reduction and filtering device according to claim 1, characterized in that: The inner edge of one end of the air inlet (3) connected to the volute (1) is inserted into the volute (1) and does not interfere with the inlet of the three-dimensional impeller (2), and the outer edge is fixed to the front side plate of the volute (1) through a flange, and the other end of the air inlet (3) connected to the air inlet box (4) is fixedly connected to the air inlet box (4) through a flange.

3. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 1, characterized in that: The air inlet of the air inlet box (4) is provided with a bag-type air filter (11) for filtering air.

4. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 1, characterized in that: The perforated plate (8) is detachably connected to the inner wall of the air intake box (4) by a bolt group (12), and the bolts pass through the air intake box (4) to fix the perforated plate (8) to the inner side of the air intake box (4).

5. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 4, characterized in that: The bolts between the perforated plate (8) and the air intake box (4) are provided with a limiting structure that can be adjusted according to the thickness of the sound-absorbing material (9) to ensure that the spacing formed between the perforated plate (8) and the air intake box (4) remains fixed.

6. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 1, characterized in that: The air inlet box (4) is an irregular rectangle, with a rectangular inlet at the upper end and a trapezoidal shape at the lower end that matches the fixing seat (7).

7. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 5, characterized in that: The air intake box (4) is a split structure, with a flange structure provided at the junction of the upper end and the lower end, which is fixedly connected by bolts.

8. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 1, characterized in that: The volute (1) is a split structure, comprising an upper volute (101) and a lower volute (102), wherein a flange structure is provided at the junction of the upper and lower halves, which are connected by bolts.

9. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 7, characterized in that: A detachable perforated plate is provided in the upper volute (101) and the lower volute (102), respectively. A cavity is formed between the perforated plate and the inner walls of the upper volute (101) and the lower volute (102), and a sound-absorbing material for eliminating noise is provided in the cavity.

10. The detachable combined three-way flow fan noise-reduction and filtering device according to claim 1, characterized in that: The three-dimensional impeller (2) has 16 blades.

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