Centrifugal blower with exhaust silencer

Abstract

The utility model relates to the technical field of centrifugal fans, and discloses a centrifugal blower with an exhaust silencer, which comprises a fan body and a flow guide pipe, the right side of the fan body is fixedly connected with an air outlet interface, the left end of the flow guide pipe is fixedly connected with a first connector, and the right end of the flow guide pipe is fixedly connected with a second connector. The outer wall of the left end of the first connector is tightly attached to and matched with the outer wall of the right end of the air outlet connector, the left end of the inner wall of the flow guide pipe is fixedly connected with an arc-shaped sound absorption plate used for changing the airflow direction, a mounting cylinder is arranged in the right end of the flow guide pipe, and the left end of the mounting cylinder is tightly attached to the right end of the arc-shaped sound absorption plate. According to the utility model, the arc-shaped sound-absorbing plates can absorb noise generated by airflow, the arc-shaped arrangement of the arc-shaped sound-absorbing plates can increase the absorption effect, the hexagonal cylinders and the flow-dividing partition plates are matched to divide the airflow into a plurality of small flow channels, the flow speed of a single channel is reduced, turbulent noise is reduced, and the sound-insulating cotton and the shell can block noise diffusion from the outside of the device. Therefore, the effect of reducing noise is achieved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, and in particular to a centrifugal blower with an exhaust silencing device. Background Technology

[0002] Centrifugal blowers are a type of general-purpose equipment widely used in various industrial fields. Compared with traditional screw blowers and Roots blowers, centrifugal blowers are more energy-efficient due to their higher compression efficiency. Therefore, more and more centrifugal blowers are replacing traditional blowers and becoming the new favorite of the market and users.

[0003] When a centrifugal blower is running, the impeller rotation generates a strong airflow, which produces strong aerodynamic noise when the airflow is discharged. The noise spreads in all directions. Long-term exposure to high noise environment can affect the health of workers, including hearing damage, insomnia, headaches, anxiety, depression, etc. Continuous noise interference may affect people's psychological and physiological health. Therefore, a centrifugal blower with an exhaust silencer is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a centrifugal blower with an exhaust silencing device, which can reduce the noise generated during blower operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A centrifugal blower with an exhaust silencing device includes a blower body and a guide pipe. An air outlet is fixedly connected to the right side of the blower body. A first connector is fixedly connected to the left end of the guide pipe, with the outer wall of the left end of the first connector tightly fitted against the outer wall of the right end of the air outlet. An arc-shaped sound-absorbing plate for changing the airflow direction is fixedly connected to the left end of the inner wall of the guide pipe. An installation cylinder is disposed inside the right end of the guide pipe, with the left end of the installation cylinder tightly fitted against the right end of the arc-shaped sound-absorbing plate. A hexagonal cylinder for flow diversion is disposed inside the installation cylinder, and a flow-diverting baffle for further flow diversion is fixedly connected to the outside of the hexagonal cylinder. The end of the flow-diverting baffle is fixedly connected to the inner wall of the installation cylinder. Flow equalization plates are fixedly connected to the inside of both the left and right ends of the installation cylinder. A sound insulation component is disposed outside the guide pipe, and a fixing component for installing and disassembling the installation cylinder is disposed at the right end of the guide pipe.

[0007] Furthermore, the sound insulation component includes sound insulation cotton disposed outside the guide tube. The upper and lower sides of the sound insulation cotton are provided with outer shells for connecting to the guide tube by bolts. The left and right ends of the outer shells are provided with mating grooves. The inner wall of the mating grooves fits tightly with the outer walls of the left and right ends of the guide tube. The outer shell is fixedly connected with reinforcing strips.

[0008] Furthermore, a first wedge is fixedly connected to the left end of the first connector, and an inclined surface is provided inside the left end of the first wedge.

[0009] Furthermore, a second wedge is fixedly connected to the outside of the right end of the air outlet, and the outer wall of the right end of the second wedge engages with the inclined surface provided inside the left end of the first wedge.

[0010] Furthermore, both the first wedge and the air outlet are fixedly connected to a first connecting flange for connection and fixation.

[0011] Furthermore, the fixing component includes a connecting ring fixedly connected to the right end of the guide tube, a second connecting head provided on the right side of the connecting ring, a top ring fixedly connected to the left end of the second connecting head, the outer wall of the top ring being tightly fitted with the inner wall of the connecting ring, and the left side of the top ring being tightly fitted with the right side of the mounting cylinder.

[0012] Furthermore, both the connecting ring and the second connecting head are fixedly connected to a second connecting flange for connection and fixation.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the arc-shaped sound-absorbing plate can absorb the noise generated by the airflow. The arc shape of the arc-shaped sound-absorbing plate can increase its absorption effect. The hexagonal cylinder and the flow divider can be combined to divide the airflow into multiple small channels, reduce the single-channel flow velocity, and reduce turbulent noise. Through the combination of the arc-shaped sound-absorbing plate, the hexagonal cylinder, the flow divider and the flow equalization plate, the noise generated by the fan airflow can be reduced from the inside.

[0015] 2. In this utility model, the sound insulation cotton and the outer shell can block the spread of noise from the outside of the device, thereby reducing the noise. The first wedge and the second wedge can cooperate to improve the sealing of the connection between the device and the fan. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of a centrifugal blower with an exhaust silencing device proposed in this utility model;

[0017] Figure 2 An exploded schematic diagram of a centrifugal blower with an exhaust silencing device proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the guide pipe of a centrifugal blower with an exhaust silencer proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of a flow divider for a centrifugal blower with an exhaust silencing device proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of the air outlet of a centrifugal blower with an exhaust silencing device proposed in this utility model.

[0021] Legend:

[0022] 1. Fan body; 2. Guide pipe; 3. Sound insulation cotton; 4. Outer shell; 5. Reinforcing strip; 6. Mating groove; 7. Arc-shaped sound-absorbing plate; 8. Mounting cylinder; 9. Hexagonal cylinder; 10. Diverting baffle; 11. Flow equalization plate; 12. Air outlet; 13. First connector; 14. First wedge; 15. Second wedge; 16. First connecting flange; 17. Second connector; 18. Connecting ring; 19. Top ring; 20. Second connecting flange. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 2-4 This utility model provides an embodiment of a centrifugal blower with an exhaust silencing device, comprising a blower body 1 and a guide pipe 2. An exhaust port 12 is fixedly connected to the right side of the blower body 1. A first connector 13 is fixedly connected to the left end of the guide pipe 2. The outer wall of the left end of the first connector 13 is tightly fitted to the outer wall of the right end of the exhaust port 12. An arc-shaped sound-absorbing plate 7 for changing the airflow direction is fixedly connected to the left end of the inner wall of the guide pipe 2. An installation cylinder 8 is provided inside the right end of the guide pipe 2. The left end of the installation cylinder 8 is tightly fitted to the right end of the arc-shaped sound-absorbing plate 7. The unit is equipped with a hexagonal cylinder 9 for diverting the flow. A diverting baffle 10 for further diverting the flow is fixedly connected to the outside of the hexagonal cylinder 9. The end of the diverting baffle 10 is fixedly connected to the inner wall of the mounting cylinder 8. A flow equalization plate 11 is fixedly connected to the inside of both the left and right ends of the mounting cylinder 8. A sound insulation cotton 3 is provided on the outside of the guide pipe 2. A housing 4 for connecting to the guide pipe 2 by bolts is provided on both the upper and lower sides of the sound insulation cotton 3. A mating groove 6 is provided on both the left and right ends of the housing 4. The inner wall of the mating groove 6 fits tightly with the outer wall of the left and right ends of the guide pipe 2. A reinforcing strip 5 is fixedly connected to the outside of the housing 4.

[0025] Insert the end of the first connector 13 into the air outlet 12, install the guide pipe 2 on the outside of the fan body 1, start the fan body 1 to form airflow, the airflow enters the inside of the guide pipe 2 through the air outlet 12 and the first connector 13, the airflow contacts the arc-shaped sound-absorbing plate 7, the arc-shaped sound-absorbing plate 7 absorbs and reduces the noise generated by the airflow, then the airflow enters the inside of the mounting cylinder 8 through the flow equalization plate 11, and then the airflow is divided into multiple small airflows through the hexagonal cylinder 9 and the flow divider 10, thereby reducing the single-channel flow velocity and reducing turbulent noise. The sound insulation cotton 3 is set on the outside of the guide pipe 2 to block the diffusion of noise. The outer shell 4 is installed on the outside of the guide pipe 2 with bolts to protect the sound insulation cotton 3. The outer shell 4 can be protected by the reinforcing strip 5 to improve the strength of the outer shell 4 and increase its service life.

[0026] Reference Figure 1 and Figure 5 A first wedge 14 is fixedly connected to the left end of the first connector 13. The left end of the first wedge 14 has an inclined surface inside. A second wedge 15 is fixedly connected to the right end of the air outlet 12. The outer wall of the right end of the second wedge 15 cooperates with the inclined surface inside the left end of the first wedge 14. Both the first wedge 14 and the air outlet 12 are fixedly connected to a first connecting flange 16 for connection and fixation.

[0027] Insert the end of the first connector 13 into the air outlet 12, move the second wedge 15 into the interior of the first wedge 14, fix the bolt and nut to the first connecting flange 16, so that the second wedge 15 is close to the first wedge 14, squeeze the sealing gasket between the second wedge 15 and the first wedge 14, thereby improving its sealing performance, and fix the guide pipe 2 to the outside of the fan body 1.

[0028] Reference Figures 1-3 A connecting ring 18 is fixedly connected to the right end of the guide pipe 2. A second connector 17 is provided on the right side of the connecting ring 18. A top ring 19 is fixedly connected to the left end of the second connector 17. The outer wall of the top ring 19 is tightly fitted with the inner wall of the connecting ring 18. The left side of the top ring 19 is tightly fitted with the right side of the mounting cylinder 8. A second connecting flange 20 for connection and fixation is fixedly connected to the outside of both the connecting ring 18 and the second connector 17.

[0029] Remove the bolts and nuts on the second connecting flange 20 to release the fixation of the second connector 17. Then remove the second connector 17 from the guide pipe 2 to release the restriction of the top ring 19 on the mounting cylinder 8. The mounting cylinder 8 can then be removed from the guide pipe 2 for cleaning. During installation, insert the top ring 19 into the inside of the guide pipe 2 and use the top ring 19 to hold the mounting cylinder 8 in place, thereby fixing the mounting cylinder 8.

[0030] Working principle: Insert the end of the first connector 13 into the air outlet 12, so that the first wedge 14 and the second wedge 15 cooperate. Then, fix the air outlet 12 and the first connector 13 by using bolts and nuts to cooperate with the first connecting flange 16, so that the second wedge 15 and the first wedge 14 are tightly fitted. Install the guide pipe 2 on the fan body 1, start the fan body 1 to form airflow, and the airflow is discharged from the air outlet 12, enters the interior of the guide pipe 2 through the first connector 13, and absorbs the noise generated by the airflow through the arc-shaped sound-absorbing plate 7 set inside the guide pipe 2. Then the airflow passes through the flow equalization plate 1. 1. The airflow enters the interior of the mounting cylinder 8 and is divided into multiple small channels by the hexagonal cylinder 9 and the diversion baffle 10 to reduce the single-channel flow velocity and reduce turbulence noise. Then it is discharged through the second connector 17. The second connector 17 is installed at the right end of the guide pipe 2. The top ring 19 is inserted into the interior of the guide pipe 2 and presses against the mounting cylinder 8 to fix it inside the guide pipe 2. Then, the second connector 17 is fixed by bolts and nuts inserted into the second connecting flange 20. The sound insulation cotton 3 is protected outside the fan body 1 by the outer shell 4. The sound insulation cotton 3 blocks the spread of noise from outside the guide pipe 2.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centrifugal blower with an exhaust silencer, characterized in that, The device includes a fan body (1) and a guide pipe (2). An air outlet (12) is fixedly connected to the right side of the fan body (1). A first connector (13) is fixedly connected to the left end of the guide pipe (2). The outer wall of the left end of the first connector (13) is tightly fitted with the outer wall of the right end of the air outlet (12). An arc-shaped sound-absorbing plate (7) for changing the airflow direction is fixedly connected to the left end of the inner wall of the guide pipe (2). An installation cylinder (8) is provided inside the right end of the guide pipe (2). The left end of the installation cylinder (8) is connected to the arc-shaped sound-absorbing plate (7). The right end of the plate (7) is tightly attached. The interior of the mounting cylinder (8) is provided with a hexagonal cylinder (9) for diverting the flow. The exterior of the hexagonal cylinder (9) is fixedly connected with a diversion baffle (10) for further diverting the flow. The end of the diversion baffle (10) is fixedly connected to the inner wall of the mounting cylinder (8). Both the left and right ends of the mounting cylinder (8) are fixedly connected with flow equalization plates (11). The exterior of the guide pipe (2) is provided with a sound insulation component. The right end of the guide pipe (2) is provided with a fixing component for installing and disassembling the mounting cylinder (8).

2. A centrifugal blower with an exhaust silencing device according to claim 1, characterized in that: The sound insulation component includes sound insulation cotton (3) installed on the outside of the flow guide (2). The upper and lower sides of the sound insulation cotton (3) are provided with outer shells (4) for connecting to the flow guide (2) by bolts. The left and right ends of the outer shell (4) are provided with mating grooves (6). The inner wall of the mating groove (6) is tightly fitted with the outer walls of the left and right ends of the flow guide (2). The outer shell (4) is fixedly connected with reinforcing strips (5).

3. A centrifugal blower with an exhaust silencing device according to claim 1, characterized in that: The left end of the first connector (13) is fixedly connected to a first wedge (14), and the left end of the first wedge (14) is provided with an inclined surface.

4. A centrifugal blower with an exhaust silencing device according to claim 1, characterized in that: The right end of the air outlet (12) is fixedly connected to a second wedge (15), and the outer wall of the right end of the second wedge (15) is engaged with the inclined surface set inside the left end of the first wedge (14).

5. A centrifugal blower with an exhaust silencing device according to claim 3, characterized in that: The first wedge (14) and the air outlet (12) are both fixedly connected to a first connecting flange (16) for connection and fixation.

6. A centrifugal blower with an exhaust silencing device according to claim 1, characterized in that: The fixing assembly includes a connecting ring (18) fixedly connected to the right end of the guide tube (2), a second connecting head (17) is provided on the right side of the connecting ring (18), and a top ring (19) is fixedly connected to the left end of the second connecting head (17). The outer wall of the top ring (19) is tightly fitted with the inner wall of the connecting ring (18), and the left side of the top ring (19) is tightly fitted with the right side of the mounting cylinder (8).

7. A centrifugal blower with an exhaust silencing device according to claim 6, characterized in that: The connecting ring (18) and the second connecting head (17) are both fixedly connected to a second connecting flange (20) for connection and fixation.

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