Centrifugal fan with automatically adapting pipe diameter and control method

Abstract

The present application relates to centrifugal fan technical field, especially to a kind of automatic adaptation pipe diameter's centrifugal fan and control method, including base, base top is respectively fixedly provided with shell and servo motor, shell is sequentially provided with main turntable, dismounting disc, lower cover and upper cover in horizontal direction in;Main turntable and the output end coaxial fixed connection of servo motor, dismounting disc is slidably inserted relative to main turntable, lower cover and dismounting disc relative side wall are fixedly connected with several connecting rods, upper cover is fixedly connected with several fan blades relative to the side wall of lower cover, several accommodating grooves for facilitating the horizontal sliding insertion of fan blade are formed in lower cover, still include;Insertion assembly;Driving assembly.The present application is compared with the fan in the prior art, under the driving of driving assembly, fan blade slides along accommodating groove and adjusts axial height, realizes the air volume adaptation matching of different pipelines, improves air supply transmission efficiency, to further optimize the operating performance of centrifugal fan.

Description

Technical Field

[0001] This invention relates to the field of centrifugal fan technology, and in particular to a centrifugal fan and control method that automatically adapts to pipe diameter. Background Technology

[0002] Centrifugal fans are fluid machines that rely on the centrifugal force generated by the rotation of an impeller to drive airflow. They are used for gas transportation, ventilation, and other applications. They are also called centrifugal ventilators. Simple natural ventilation or ordinary air supply methods do not meet the actual application needs. In order to ensure airflow transportation efficiency and adapt to different working conditions, centrifugal fans are required to achieve stable and controllable gas transportation effects.

[0003] In existing centrifugal fans, a motor drives the shaft and impeller blades to rotate, thereby achieving air delivery and stable airflow within the duct. However, since the impeller blades are a fixed structure, their radial extension length cannot dynamically adapt to the duct's inner diameter, making it difficult to stably adjust the airflow and delivery pressure. This results in insufficient airflow when the duct inner diameter is large and airflow blockage when it is small, ultimately limiting the improvement of the centrifugal fan's air delivery adaptability performance in different duct diameter scenarios. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that in the prior art, the blades of the fan are fixed structures and their radial extension length cannot be dynamically adapted to the inner diameter of the pipe, making it difficult to stably adjust the wind force and air supply pressure, which leads to insufficient air supply flow when the inner diameter of the pipe is large and easy to form airflow blockage when the inner diameter of the pipe is small. Therefore, this invention proposes a centrifugal fan and control method that automatically adapts to the pipe diameter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A centrifugal fan that automatically adapts to pipe diameter includes a base, on the top of which a housing and a servo motor are fixedly mounted. Inside the housing, a main turntable, a disassembly plate, a lower cover, and an upper cover are arranged horizontally in sequence. The main turntable and the output end of the servo motor are coaxially fixedly connected. The disassembly plate is horizontally slidably inserted relative to the main turntable. Several connecting rods are fixedly connected to the side walls of the lower cover and the disassembly plate. Several fan blades are fixedly connected to the side wall of the upper cover relative to the lower cover. Several receiving grooves are opened on the lower cover to facilitate the horizontal sliding insertion of the fan blades. The plug-in assembly facilitates the fixed installation of the disassembly plate relative to the main turntable; A drive assembly for adjusting the horizontal sliding of the fan blades relative to the receiving groove.

[0006] Preferably, the plug-in assembly includes: A limiting rod is coaxially fixedly connected to the main turntable, and the disassembly and assembly plate is horizontally slidably sleeved on the limiting rod; A first abutment plate is fixedly sleeved on the limiting rod, and the disassembly plate is in contact with the side wall of the main turntable and the first abutment plate.

[0007] Preferably, the plug-in assembly further includes: A lead screw is fixedly connected to the main turntable and extends horizontally through the assembly / disassembly plate. The second abutment is fixedly sleeved on the lead screw, and the disassembly plate is in contact with the side wall of the main turntable and the second abutment. A sleeve is threadedly connected to the lead screw, and the sleeve and the disassembly / assembly disc are correspondingly arranged.

[0008] Preferably, the main turntable, the disassembly / assembly plate, the lower cover, and the upper cover are arranged horizontally and coaxially in sequence.

[0009] Preferably, an exhaust pipe is fixedly installed through the top of the outer casing, and the exhaust pipe and the fan blades are correspondingly arranged.

[0010] Preferably, the upper cover is provided in the form of a boss, and the upper cover has a vent to facilitate the guidance of airflow.

[0011] Preferably, the assembly / disassembly plate has a limiting opening for the horizontal sliding of the limiting rod and a through hole for the horizontal passing of the lead screw, and the limiting opening and the assembly / disassembly plate are coaxially arranged.

[0012] Preferably, the driving component includes: The cylinder is fixedly connected to the disassembly / assembly plate. A connecting plate is fixedly connected to the output end of the cylinder, and the connecting plate is fixedly connected to the upper cover.

[0013] Preferably, the fan blades are arranged in a ring array, the connecting plate is arranged in a U-shape, the lower cover has an opening for taking out and putting in, and the cylinder and the connecting plate pass horizontally through the opening for taking out and putting in.

[0014] A method for controlling a centrifugal fan that automatically adapts to pipe diameter, the method comprising the following steps: Step S1, Initialization check; Before starting the equipment, perform an initialization check to confirm that the disassembly and assembly plate is securely fixed to the main turntable through the cooperation of the screw and the sleeve, and that the fan blades are stored in the receiving groove of the lower cover. Ensure that the main turntable, disassembly and assembly plate, lower cover and upper cover are coaxially arranged and that there is no looseness of any component. Step S2, airflow adaptation; The cylinder in the start drive assembly is activated. The cylinder output drives the connecting plate to move horizontally. The connecting plate synchronously drives the upper cover to move the fan blades horizontally along the receiving groove of the lower cover. By adjusting the length of the fan blades extending out of the receiving groove, the air volume can be adapted and adjusted. After the adjustment is completed, the cylinder remains in the current state. When in use, the servo motor is started. The servo motor drives the main turntable to rotate, which in turn drives the fan blades to rotate. Step S3, disassembly and maintenance; When maintenance is required, loosen the sleeve to release the fixing of the disassembly plate, push the disassembly plate to slide horizontally along the limit rod and screw on the main turntable, so that the disassembly plate is separated from the main turntable, and then the lower cover and fan blades are removed as a whole through the connecting rod for cleaning and maintenance of the fan blades. Step S4, reassemble and reset; After maintenance, assemble in the reverse order of disassembly. First, connect the lower cover to the disassembly plate via the connecting rod. Then, put the disassembly plate onto the limiting rod and the lead screw and fit it against the corresponding abutment plate one and abutment plate two. Tighten the sleeve to fix it and complete the assembly.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows: 1. This invention utilizes the sliding fit between the fan blade and the receiving groove, along with the driving action of the drive component. The fan blade is fixedly connected to the upper cover, and the upper cover is connected to the connecting plate. Under the drive of the drive component, the fan blade slides along the receiving groove to adjust its axial height, thereby achieving air volume adaptation and matching for different pipes, improving air delivery efficiency, and further optimizing the operating performance of the centrifugal fan.

[0016] 2. This invention uses a fixed connection between the upper cover and the fan blades and a connecting rod connection between the lower cover and the disassembly plate. The disassembly plate is fixed by a plug-in assembly. After disassembling the plug-in assembly, the components are separated, allowing for individual cleaning and maintenance of the upper cover, lower cover, and fan blades. This improves the convenience of equipment cleaning and further ensures the long-term stable operation of the centrifugal fan. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a centrifugal fan and control method that automatically adapts to pipe diameter, as proposed in this invention. Figure 2 This is a schematic diagram of the internal structure of the outer casing of a centrifugal fan and control method for automatically adapting to pipe diameter proposed in this invention. Figure 3 This is a schematic diagram showing the separation of the fan blades relative to the receiving groove in a centrifugal fan and control method that automatically adapts to pipe diameter proposed in this invention. Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the connecting plate in the centrifugal fan and control method for automatically adapting to pipe diameter proposed in this invention; Figure 6This is a schematic diagram of the connecting plate and cylinder in a centrifugal fan and control method for automatically adapting to pipe diameter proposed in this invention.

[0018] In the picture: 1. Base; 2. Housing; 3. Servo motor; 4. Main turntable; 41. Limiting rod; 42. First stop plate; 43. Lead screw; 44. Second stop plate; 45. Sleeve; 5. Assembly / disassembly plate; 51. Cylinder; 52. Connecting plate; 53. Limiting port; 54. Through hole; 6. Connecting rod; 7. Lower cover; 71. Receiving groove; 8. Upper cover; 81. Ventilation port; 9. Fan blade; 10. Exhaust pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figures 1-6 A centrifugal fan with automatic pipe diameter adaptation and control method are disclosed. The fan includes a base 1, which provides a stable support foundation. The top of the base 1 is fixed with a housing 2 and a servo motor 3 respectively. The housing 2 has a hollow cavity structure with reserved installation space inside for the orderly arrangement of components such as the main turntable 4. The main turntable 4, the disassembly plate 5, the lower cover 7, and the upper cover 8 are arranged horizontally inside the housing 2.

[0021] The main turntable 4 serves as the core of power transmission, with its central axis directly coaxially fixed to the output end of the servo motor 3. The main turntable 4 and the output end of the servo motor 3 are coaxially fixedly connected. The disassembly plate 5 has horizontal sliding freedom and is detachably connected to the main turntable 4 through a plug-in structure. The disassembly plate 5 is horizontally slidably plugged into the main turntable 4. The two ends of the connecting rod 6 are welded and fixed to the disassembly plate 5 and the lower cover 7 respectively, ensuring that the two move synchronously. Several connecting rods 6 are fixedly connected to the opposite side walls of the lower cover 7 and the disassembly plate 5. The upper cover 8 is fixedly integrated with the fan blade 9, and its movement directly drives the fan blade 9 to adjust its extension length. Several fan blades 9 are fixedly connected to the side wall of the upper cover 8 relative to the lower cover 7. The lower cover 7 provides an installation reference for the fan blade 9. The inner wall of the receiving groove 71 slides against the fan blade 9, and several receiving grooves 71 are provided on the lower cover 7 to facilitate the horizontal sliding insertion of the fan blade 9.

[0022] The plug-in assembly facilitates the fixed installation of the disassembly / removal disc 5 relative to the main turntable 4. It includes a limiting rod 41, a first abutment plate 42, a lead screw 43, a second abutment plate 44, and a sleeve 45. The limiting rod 41 is positioned along the axis of the main turntable 4, providing precise guidance for the sliding of the disassembly / removal disc 5. The limiting rod 41 is coaxially and fixedly connected to the main turntable 4, and the disassembly / removal disc 5 slides horizontally on the limiting rod 41. The first abutment plate 42 is fixedly spaced from the main turntable 4, limiting the extreme position of the disassembly / removal disc 5 near the main turntable 4. The first abutment plate 42 is fixedly fitted onto the limiting rod 41, and the disassembly / removal disc 5 contacts the side wall of the main turntable 4 and the first abutment plate 42. The lead screw 43 is arranged parallel to the limiting rod 41, and its threaded structure is adapted to the sleeve 45 for fastening. The lead screw 43 is fixedly connected to the main turntable 4 and horizontally penetrates the disassembly / removal disc 5. The second abutment plate 44 and the first abutment plate 42 are symmetrically arranged to jointly restrict the radial displacement of the disassembly and assembly plate 5. The second abutment plate 44 is fixedly sleeved on the lead screw 43, and the disassembly and assembly plate 5 is in contact with the side wall of the main turntable 4. After the sleeve 45 is tightened, it fits tightly against the side wall of the disassembly and assembly plate 5 to achieve a stable fixation between it and the main turntable 4. The sleeve 45 and the lead screw 43 are threadedly connected, and the sleeve 45 and the disassembly and assembly plate 5 are correspondingly arranged.

[0023] The drive assembly, used to adjust the horizontal sliding of the fan blade 9 relative to the receiving groove 71, includes a cylinder 51 and a connecting plate 52. The cylinder 51 provides linear driving force, and its output end extends and retracts, directly driving the horizontal displacement of the connecting plate 52. The cylinder 51 is fixedly connected to the disassembly plate 5. The connecting plate 52 transmits the power of the cylinder 51. The connecting plate 52 is fixedly connected to the output end of the cylinder 51, and the connecting plate 52 is also fixedly connected to the upper cover 8.

[0024] The main turntable 4, disassembly / reassembly plate 5, lower cover 7, and upper cover 8 are horizontally arranged coaxially. This coaxial arrangement avoids eccentric vibration during rotation and ensures operational stability. A through-type exhaust duct 10 is fixedly installed on the top of the outer casing 2. The exhaust duct 10 connects to the internal airflow channel of the outer casing 2, guiding the airflow generated by the fan blades 9 to a directional output. The exhaust duct 10 and fan blades 9 are correspondingly arranged. The upper cover 8 is a boss-shaped structure that adapts to the internal space of the outer casing 2. The vent 81 optimizes the airflow path, and the upper cover 8 has vents 81 for guiding airflow.

[0025] The assembly / disassembly plate 5 has a limiting port 53 for the limiting rod 41 to slide horizontally through and a through hole 54 for the lead screw 43 to pass horizontally through. The limiting port 53 is clearance-fitted with the limiting rod 41, and the diameter of the through hole 54 is adapted to the lead screw 43 to pass through smoothly. The limiting port 53 and the assembly / disassembly plate 5 are coaxially arranged.

[0026] Several fan blades 9 are arranged in a ring array. The ring array of fan blades 9 ensures uniform airflow distribution. The U-shaped connecting plate 52 is adapted to the installation position of the upper cover 8. The connecting plate 52 is U-shaped. The lower cover 7 has a pick-and-place opening. The size of the pick-and-place opening matches the cylinder 51 and the connecting plate 52, which facilitates the disassembly and assembly of the components. The cylinder 51 and the connecting plate 52 pass horizontally through the pick-and-place opening.

[0027] The functional principle of this invention can be explained through the following operational methods: Initialization check; before starting the equipment, perform an initialization check to confirm that the disassembly plate 5 is securely fixed to the main turntable 4 through the cooperation of the screw 43 and the sleeve 45, and that the fan blade 9 is housed in the receiving groove 71 of the lower cover 7, ensuring that the main turntable 4, disassembly plate 5, lower cover 7 and upper cover 8 are coaxially arranged and that there is no looseness in any component. Air volume adaptation; start the cylinder 51 in the drive assembly. The output end of the cylinder 51 drives the connecting plate 52 to move horizontally. The connecting plate 52 synchronously drives the upper cover 8 to drive the fan blade 9 to slide horizontally along the receiving groove 71 of the lower cover 7. By adjusting the length of the fan blade 9 extending out of the receiving groove 71, the air volume adaptation adjustment is achieved. After the adjustment is completed, the cylinder 51 remains in the current state. When in use, start the servo motor 3. The servo motor 3 drives the main turntable 4 to rotate, which in turn drives the fan blade 9 to rotate. Disassembly and maintenance: When maintenance is required, loosen the sleeve 45 to release the fixing of the disassembly plate 5, push the disassembly plate 5 to slide horizontally along the limit rod 41 and the lead screw 43 on the main turntable 4, so that the disassembly plate 5 is separated from the main turntable 4, and then the lower cover 7 and the fan blade 9 are removed as a whole through the connecting rod 6, and the fan blade 9 is cleaned and maintained. Reassemble and reset; after maintenance, assemble in the reverse order of disassembly. First, connect the lower cover 7 to the disassembly plate 5 through the connecting rod 6. Then, put the disassembly plate 5 onto the limiting rod 41 and the lead screw 43 and attach it to the corresponding abutment plate 1 42 and abutment plate 2 44. Tighten the sleeve 45 to complete the fixation and complete the assembly.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A centrifugal fan that automatically adapts to pipe diameter, comprising a base (1), characterized in that, The base (1) is fixedly provided with a shell (2) and a servo motor (3) on the top. The main turntable (4), disassembly plate (5), lower cover (7) and upper cover (8) are arranged horizontally inside the shell (2). The output ends of the main turntable (4) and the servo motor (3) are coaxially fixedly connected. The disassembly plate (5) is horizontally slidably inserted relative to the main turntable (4). Several connecting rods (6) are fixedly connected to the side walls of the lower cover (7) and the disassembly plate (5). Several fan blades (9) are fixedly connected to the side wall of the upper cover (8) relative to the lower cover (7). Several receiving slots (71) are provided on the lower cover (7) to facilitate the horizontal sliding insertion of the fan blades (9). The plug-in assembly facilitates the fixed installation of the disassembly plate (5) relative to the main turntable (4); A drive assembly for adjusting the horizontal sliding of the fan blade (9) relative to the receiving groove (71).

2. The centrifugal fan with automatic pipe diameter adaptation according to claim 1, characterized in that, The plug-in assembly includes: The limiting rod (41) is coaxially fixedly connected to the main turntable (4), and the disassembly plate (5) is horizontally slidably sleeved on the limiting rod (41). The first abutment plate (42) is fixedly sleeved on the limiting rod (41), and the disassembly plate (5) is in contact with the side wall of the main turntable (4) and the first abutment plate (42).

3. A centrifugal fan with automatic pipe diameter adaptation according to claim 2, characterized in that, The plug-in assembly further includes: The lead screw (43) is fixedly connected to the main turntable (4) and the lead screw (43) passes horizontally through the disassembly and assembly plate (5). The second abutment (44) is fixedly sleeved on the lead screw (43), and the disassembly plate (5) is in contact with the side wall of the main turntable (4) and the second abutment (44); The sleeve (45) is threadedly connected to the lead screw (43), and the sleeve (45) and the disassembly / assembly plate (5) are correspondingly arranged.

4. A centrifugal fan with automatic pipe diameter adaptation according to claim 1, characterized in that, The main turntable (4), the disassembly plate (5), the lower cover (7), and the upper cover (8) are arranged horizontally and coaxially in sequence.

5. A centrifugal fan with automatic pipe diameter adaptation according to claim 1, characterized in that, The top of the outer shell (2) is fixedly and continuously equipped with an exhaust pipe (10), and the exhaust pipe (10) and the fan blade (9) are correspondingly arranged.

6. A centrifugal fan with automatic pipe diameter adaptation according to claim 1, characterized in that, The upper cover (8) is provided in the form of a boss, and the upper cover (8) is provided with a vent (81) to facilitate the guidance of airflow.

7. A centrifugal fan with automatic pipe diameter adaptation according to claim 3, characterized in that, The assembly / disassembly plate (5) is provided with a limiting port (53) for the limiting rod (41) to slide horizontally through and a through hole (54) for the lead screw (43) to slide horizontally through, and the limiting port (53) and the assembly / disassembly plate (5) are coaxially arranged.

8. A centrifugal fan with automatic pipe diameter adaptation according to claim 1, characterized in that, The driving component includes: Cylinder (51), cylinder (51) is fixedly connected to the disassembly and assembly plate (5); The connecting plate (52) is fixedly connected to the output end of the cylinder (51), and the connecting plate (52) and the upper cover (8) are fixedly connected.

9. A centrifugal fan with automatic pipe diameter adaptation according to claim 1, characterized in that, Several fan blades (9) are arranged in a ring array, the connecting plate (52) is arranged in a U-shape, the lower cover (7) is provided with a pick-up and put-out port, and the cylinder (51) and the connecting plate (52) pass horizontally through the pick-up and put-out port.

10. A centrifugal fan control method for automatically adapting to pipe diameter using the centrifugal fan described in claims 1-9, characterized in that, The method includes the following steps: Step S1, Initialization check; Before starting the equipment, an initialization check is performed to confirm that the disassembly plate (5) is securely fixed to the main turntable (4) through the cooperation of the screw (43) and the sleeve (45), and that the fan blade (9) is stored in the receiving groove (71) of the lower cover (7), ensuring that the main turntable (4), disassembly plate (5), lower cover (7) and upper cover (8) are coaxially set and that no part is loose. Step S2, airflow adaptation; Start the cylinder (51) in the drive assembly. The output end of the cylinder (51) drives the connecting plate (52) to move horizontally. The connecting plate (52) synchronously drives the upper cover (8) to drive the fan blade (9) to slide horizontally along the receiving groove (71) of the lower cover (7). By adjusting the length of the fan blade (9) extending out of the receiving groove (71), the air volume can be adapted and adjusted. After the adjustment is completed, the cylinder (51) remains in the current state. When in use, start the servo motor (3). The servo motor (3) drives the main turntable (4) to rotate, which in turn drives the fan blade (9) to rotate. Step S3, disassembly and maintenance; When maintenance is required, loosen the sleeve (45) to release the fixing of the disassembly plate (5), push the disassembly plate (5) to slide horizontally along the limit rod (41) and screw (43) on the main turntable (4), so that the disassembly plate (5) is separated from the main turntable (4), and then the lower cover (7) and fan blade (9) are removed as a whole through the connecting rod (6) for cleaning and maintenance of the fan blade (9); Step S4, reassemble and reset; After maintenance, assemble in the reverse order of disassembly. First, connect the lower cover (7) to the disassembly plate (5) through the connecting rod (6). Then, put the disassembly plate (5) onto the limiting rod (41) and the screw (43) and attach it to the corresponding abutment plate one (42) and abutment plate two (44). Tighten the sleeve (45) to complete the fixation and complete the assembly.

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