Low-noise centrifugal fan inner air duct structure

Abstract

This utility model relates to the field of centrifugal fan technology for fresh air systems, and discloses a low-noise centrifugal fan internal duct structure, including a volute body. A controller is detachably mounted on the inner wall of the volute body, and a fixing block is detachably mounted on the outer wall of the controller. A connection port is provided on the inner wall of the volute body, and an impeller is disposed on the outer wall of the controller. An air inlet block is fixedly connected to the inner wall of the volute body, and a vibration damping mesh is disposed on the inner wall of the air inlet block. A sound-absorbing plate is disposed on the inner wall of the volute body, and a sealing assembly is disposed on the inner wall of the volute body. In this utility model, by activating the controller to rotate the impeller, the vibration damping mesh and the sound-absorbing plate work together to effectively absorb and buffer the vibrations generated by the fan, while the sound-absorbing plate effectively reduces the noise generated during fan operation, thereby reducing the impact of noise on the surrounding environment.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology for fresh air systems, and particularly to a low-noise centrifugal fan internal duct structure. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. They are a type of driven fluid machinery and are widely used in industrial and civil fields. Low-noise internal air duct structures usually employ better vibration damping designs and optimized airflow channels, which can reduce airflow turbulence and vibration, thereby protecting the fan and related system components and reducing equipment maintenance and replacement costs.

[0003] The existing low-noise centrifugal fan internal duct structure is prone to gas vortex formation due to the adhesion of dust and impurities during use. At the same time, when the gas enters the volute from the high-speed impeller, the flow velocity drops sharply, causing vortex noise to be generated during the conversion of kinetic energy into pressure energy. Furthermore, the sudden change in curvature or surface roughness of the volute flow channel will also aggravate airflow friction and turbulence noise, resulting in increased noise during the operation of the centrifugal fan. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a low-noise centrifugal fan internal duct structure, aiming to solve the problem that existing low-noise centrifugal fan internal duct structures are prone to gas vortex formation due to the adhesion of dust and impurities during use. At the same time, when the gas enters the volute from the high-speed impeller, the sudden drop in flow velocity causes vortex noise during the conversion of kinetic energy into pressure energy. Furthermore, the abrupt change in the curvature or rough surface of the volute flow channel will also aggravate airflow friction and turbulence noise, resulting in increased noise during centrifugal fan operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-noise centrifugal fan internal air duct structure, including a volute body, a controller detachably mounted on the inner wall of the volute body, a fixing block detachably mounted on the outer wall of the controller, a connection port opened on the inner wall of the volute body, an impeller provided on the outer wall of the controller, an air inlet block fixedly connected to the inner wall of the volute body, a shock-absorbing mesh provided on the inner wall of the air inlet block, a sound-absorbing plate provided on the inner wall of the volute body, and a sealing assembly provided on the inner wall of the volute body.

[0006] The above technical solution involves installing the controller into the volute body, then rotating the fixing block to secure the controller. After removing the controller's wiring through the connector, the sound-absorbing plate is installed on the inner wall of the volute body, and the vibration damping mesh is installed on the inner wall of the intake block. The combined use of the vibration damping mesh and the sound-absorbing plate achieves a synergistic noise reduction effect.

[0007] As a further description of the above technical solution:

[0008] The sealing assembly includes a sealing groove, the outer wall of which is disposed on the inner wall of the volute body. A wind turbine housing is detachably installed on the outer wall of the volute body. A sealing strip is fixedly connected to the inner wall of the wind turbine housing. The outer wall of the sealing strip is slidably connected to the inner wall of the sealing groove.

[0009] Through the above technical solution: when the impeller shell and the volute body are spliced ​​and installed, the sealing strip fixed on the inner wall of the impeller shell slides to the inner wall of the sealing groove set on the inner wall of the volute body, so that the equipment achieves a sealing effect, which can prevent the treated gas from entering the external environment and maintain the performance and efficiency of the fan.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the wind turbine housing is fixedly connected to an air duct block, the inner wall of the wind turbine housing is provided with a volute air duct, and the upper surface of the wind turbine housing is fixedly connected to an installation component.

[0012] With the above technical solution, high-pressure gas can be discharged through the volute air duct and air duct block set in the inner wall of the wind turbine housing, and the installation components are set in two sets, one set is fixed on the upper surface of the volute body, and the other set is fixed on the upper surface of the wind turbine housing.

[0013] As a further description of the above technical solution:

[0014] The lower surface of the mounting assembly is fixedly connected to the upper surface of the volute body, and a limiting shell is slidably connected to the inner wall of the mounting assembly. A push rod is slidably connected to the inner wall of the limiting shell.

[0015] The above technical solution involves installing the limiting shell on the inner wall of the mounting assembly, which allows for quick positioning and connection between the volute body and the impeller shell. The push rod provides a convenient way to operate the locking block to fix the volute body and the impeller shell.

[0016] As a further description of the above technical solution:

[0017] A spring is fixedly connected to the inner wall of the limiting shell, and a rotating block is fixedly connected to the lower surface of the spring. The inner wall of the rotating block is fixedly connected to the outer wall of the push rod.

[0018] The above technical solution uses a spring to connect the rotating block and the limiting shell to limit the push rod.

[0019] As a further description of the above technical solution:

[0020] The outer wall of the rotating block is slidably connected to the inner wall of the limiting shell, the outer wall of the push rod is threadedly connected to a cross block, and the outer wall of the cross block is rotatably connected to a rotating rod.

[0021] Through the above technical solution: the rotating block rotates into the limiting shell to lock the push rod, and the push rod is used to drive the cross block to slide.

[0022] As a further description of the above technical solution:

[0023] The outer wall of the card block is rotatably connected to a limiting post, and the outer wall of the limiting post is fixedly connected to the inner wall of the limiting shell.

[0024] The above technical solution uses a cross block to drive the rotating rod and the locking block to slide, while the locking block is used to lock the installation components.

[0025] As a further description of the above technical solution:

[0026] The outer wall of the card block is rotatably connected to a limiting post, and the outer wall of the limiting post is fixedly connected to the inner wall of the limiting shell.

[0027] The above technical solution uses a limiting post to restrict the locking block.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the impeller is rotated by starting the controller. Through the cooperation between the shock-absorbing mesh and the sound-absorbing plate, the shock-absorbing mesh can effectively absorb and buffer the vibration generated by the fan, while the sound-absorbing plate can effectively reduce the noise generated by the fan during operation, thereby reducing the impact of noise on the surrounding environment.

[0030] 2. In this utility model, pressing the push rod causes the cross block to slide, the rotating rod will pull the locking block to rotate, and rotating the push rod will lock the rotating block, while simultaneously causing the cross block to slide a second time, thereby allowing the locking block to clamp again. The locking block allows maintenance personnel to quickly disassemble the relevant components of the internal air duct structure without using complicated tools or performing cumbersome operations, thereby improving maintenance efficiency and reducing equipment downtime. Attached Figure Description

[0031] Figure 1 This is a perspective view of the internal air duct structure of a low-noise centrifugal fan proposed in this utility model.

[0032] Figure 2 This is a partial structural diagram of the shock-absorbing mesh in the internal air duct structure of a low-noise centrifugal fan proposed in this utility model.

[0033] Figure 3 This is a partial structural diagram of the controller for a low-noise centrifugal fan internal duct structure proposed in this utility model.

[0034] Figure 4 This is a partial structural diagram of the push rod of the internal air duct structure of a low-noise centrifugal fan proposed in this utility model.

[0035] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0036] Legend:

[0037] 1. Volute body; 11. Controller; 12. Fixing block; 13. Connection port; 14. Impeller; 15. Air inlet block; 2. Vibration damping mesh; 3. Silencing plate; 4. Sealing groove; 41. Sealing strip; 5. Impeller housing; 51. Air duct block; 52. Volute air duct; 6. Mounting assembly; 61. Push rod; 62. Limiting shell; 63. Spring; 64. Rotating block; 65. Cross block; 66. Rotating rod; 67. Locking block; 68. Limiting post. Detailed Implementation

[0038] 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.

[0039] Reference Figures 1-3 This utility model provides an embodiment of a low-noise centrifugal fan internal air duct structure, including a volute body 1, a controller 11 detachably mounted on the inner wall of the volute body 1, a fixing block 12 detachably mounted on the outer wall of the controller 11, a connection port 13 on the inner wall of the volute body 1, an impeller 14 on the outer wall of the controller 11, an air intake block 15 fixedly connected to the inner wall of the volute body 1, a shock-absorbing mesh 2 on the inner wall of the air intake block 15, a sound-absorbing sheet 3 on the inner wall of the volute body 1, and a sealing assembly on the inner wall of the volute body 1. The sealing assembly includes a sealing groove 4, the outer wall of the sealing groove 4 is located on the inner wall of the volute body 1, a fan housing 5 detachably mounted on the outer wall of the volute body 1, a sealing strip 41 fixedly connected to the inner wall of the fan housing 5, and the outer wall of the sealing strip 41 slidably connected to the inner wall of the sealing groove 4. The wind turbine is housed inside the wind turbine housing 5. An external rotor motor is located on the inner side of the center of one side of the wind turbine. The external rotor motor includes a rotor magnetic ring and a plastic-encapsulated stator. The rotor magnetic ring and the plastic-encapsulated stator are movably connected by a magnetically levitated air gap, and the air gap between them is 0.2-2 mm. In this embodiment, the iron core inside the plastic-encapsulated stator can be a twelve-slot ten-pole or twelve-slot fourteen-pole structure.

[0040] Specifically, the controller 11 is installed on the inner wall of the volute body 1, and the fixing block 12 is installed on the outer wall of the controller 11 to prevent the controller 11 from falling off. The connection port 13 on the inner wall of the volute body 1 facilitates the removal of the controller 11's wiring. The controller 11 drives the impeller 14 to rotate, allowing air to enter the inner wall of the volute body 1 through the air intake block 15. The damping mesh 2 and the sound-absorbing plate 3 work together to achieve a stable noise reduction effect. When the volute body 1 and the impeller shell 5 are spliced ​​together, the sealing strip 41 fixed on the inner wall of the impeller shell 5 will be inserted into the sealing groove 4 on the inner wall of the volute body 1, achieving both quick splicing and sealing.

[0041] Reference Figure 1 The inner wall of the impeller housing 5 is fixedly connected to the air duct block 51, the inner wall of the impeller housing 5 is provided with a volute air duct 52, and the upper surface of the impeller housing 5 is fixedly connected to the mounting component 6.

[0042] Specifically, the air duct block 51 and volute air duct 52 set on the inner wall of the impeller housing 5 can reduce the friction between air and equipment, thereby reducing vortex noise. The mounting component 6 set on the upper surface of the impeller housing 5 can achieve the effect of rapid positioning.

[0043] Reference Figure 4 and Figure 5 The lower surface of the mounting component 6 is fixedly connected to the upper surface of the volute body 1. The inner wall of the mounting component 6 is slidably connected to the limiting shell 62. The inner wall of the limiting shell 62 is slidably connected to the push rod 61. The inner wall of the limiting shell 62 is fixedly connected to the spring 63. The lower surface of the spring 63 is fixedly connected to the rotating block 64. The inner wall of the rotating block 64 is fixedly connected to the outer wall of the push rod 61. The outer wall of the rotating block 64 is slidably connected to the inner wall of the limiting shell 62. The outer wall of the push rod 61 is threadedly connected to the cross block 65. The outer wall of the cross block 65 is rotatably connected to the rotating rod 66. The outer wall of the rotating rod 66 is rotatably connected to the locking block 67. The outer wall of the locking block 67 is slidably connected to the outer wall of the limiting shell 62. The outer wall of the locking block 67 is rotatably connected to the limiting post 68. The outer wall of the limiting post 68 is fixedly connected to the inner wall of the limiting shell 62.

[0044] Specifically, the limiting shell 62 is placed inside the mounting assembly 6, and the push rod 61 is pressed, causing the cross block 65 to slide along the rotating rod 66. At the same time, the rotating rod 66 pushes the locking block 67 to rotate, and the limiting post 68 fixed on the inner wall of the limiting shell 62 pulls the locking block 67, which can prevent the locking block 67 from falling off. Rotating the push rod 61 allows the rotating block 64 to rotate on the inner wall of the limiting shell 62 to achieve a self-locking effect. At the same time, the push rod 61 drives the cross block 65 to slide, causing the cross block 65 to slide along the rotating rod 66 again, which allows the locking block 67 to rotate a second time to clamp the mounting assembly 6. The locking block 67 allows maintenance personnel to quickly disassemble the relevant components of the internal air duct structure without using complicated tools or performing cumbersome operations, thereby improving maintenance efficiency and reducing equipment downtime.

[0045] Working principle: When this structure is needed, the controller 11 is installed on the inner wall of the volute body 1, and the wiring of the controller 11 is connected through the connector 13. The fixing block 12 is then installed on the outer wall of the controller 11, achieving a quick installation effect. The sound-absorbing plate 3 is installed on the inner wall of the volute body 1. After the shock-absorbing mesh 2 is installed on the inner wall of the air intake block 15, the sealing strip 41 fixed to the inner wall of the impeller housing 5 is installed into the sealing groove 4 set on the inner wall of the volute body 1. The inner wall provides a self-locking effect. When the limiting shell 62 is placed inside the mounting assembly 6, pressing the push rod 61 causes the cross block 65 to slide along the rotating rod 66. Simultaneously, the rotating rod 66 pushes the locking block 67 to rotate, and the limiting post 68 driven by the limiting shell 62 pulls the locking block 67, thus preventing the locking block 67 from falling off. Rotating the push rod 61 causes the rotating block 64 to lock onto the inner wall of the limiting shell 62, achieving a self-locking effect. The spring 63 connects the rotating block 64 and the limiting shell 62, enabling... The mechanism achieves rapid reset, and push rod 61 drives cross block 65 to slide again, which can achieve secondary clamping of block 67 to prevent it from falling off. Controller 11 is activated to rotate impeller 14, and air entering from the inner wall of intake block 15 is reduced in noise by vibration damping mesh 2 and sound-absorbing plate 3. Simultaneously, air duct block 51 and volute air duct 52 reduce friction between air and equipment, thus reducing vortex noise. The vibration damping mesh 2 effectively absorbs and buffers vibrations generated by the fan, while the sound-absorbing plate 3 effectively reduces noise generated during fan operation, reducing the impact of noise on the surrounding environment. Block 67 allows maintenance personnel to quickly disassemble relevant components of the internal air duct structure without using complex tools or performing cumbersome operations, improving maintenance efficiency and reducing equipment downtime. This structure not only allows vibration damping mesh 2 and sound-absorbing plate 3 to achieve synergistic noise reduction but also enables rapid installation and disassembly.

[0046] 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 low-noise centrifugal fan inner air duct structure comprising a volute body (1), characterized in that: The inner wall of the volute body (1) is detachably equipped with a controller (11), the outer wall of the controller (11) is detachably equipped with a fixing block (12), the inner wall of the volute body (1) is provided with a connection port (13), the outer wall of the controller (11) is provided with an impeller (14), the inner wall of the volute body (1) is fixedly connected with an air intake block (15), the inner wall of the air intake block (15) is provided with a shock-absorbing mesh (2), the inner wall of the volute body (1) is provided with a sound-absorbing plate (3), and the inner wall of the volute body (1) is provided with a sealing component.

2. A low noise centrifugal fan inner duct structure according to claim 1, characterized in that: The sealing assembly includes a sealing groove (4), the outer wall of which is disposed on the inner wall of the volute body (1). The outer wall of the volute body (1) is detachably mounted with a wind turbine housing (5). The inner wall of the wind turbine housing (5) is fixedly connected with a sealing strip (41), and the outer wall of the sealing strip (41) is slidably connected to the inner wall of the sealing groove (4).

3. A low noise centrifugal fan inner duct structure according to claim 2, characterized in that: The inner wall of the wind turbine housing (5) is fixedly connected to a wind duct block (51), the inner wall of the wind turbine housing (5) is provided with a volute wind duct (52), and the upper surface of the wind turbine housing (5) is fixedly connected to an installation component (6).

4. A low noise centrifugal fan inner duct structure according to claim 3, characterized in that: The lower surface of the mounting assembly (6) is fixedly connected to the upper surface of the volute body (1), and the inner wall of the mounting assembly (6) is slidably connected to a limiting shell (62), and the inner wall of the limiting shell (62) is slidably connected to a push rod (61).

5. A low noise centrifugal fan inner duct structure according to claim 4, characterized in that: A spring (63) is fixedly connected to the inner wall of the limiting shell (62), and a rotating block (64) is fixedly connected to the lower surface of the spring (63). The inner wall of the rotating block (64) is fixedly connected to the outer wall of the push rod (61).

6. A low noise centrifugal fan inner duct structure according to claim 5, characterized in that: The outer wall of the rotating block (64) is slidably connected to the inner wall of the limiting shell (62), the outer wall of the push rod (61) is threadedly connected to a cross block (65), and the outer wall of the cross block (65) is rotatably connected to a rotating rod (66).

7. A low noise centrifugal fan inner duct structure according to claim 6, characterized in that: The outer wall of the rotating rod (66) is rotatably connected to a locking block (67), and the outer wall of the locking block (67) is slidably connected to the outer wall of the limiting shell (62).

8. A low noise centrifugal fan inner duct structure according to claim 7, characterized in that: The outer wall of the card block (67) is rotatably connected to a limiting post (68), and the outer wall of the limiting post (68) is fixedly connected to the inner wall of the limiting shell (62).

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