A kind of axial flow fan dynamic balance degree detection device

Abstract

The application relates to a kind of axial flow fan dynamic balance degree detection devices, to fan detection equipment technical field, to the problem of low precision of traditional detection equipment to axial flow fan balance degree detection.A kind of axial flow fan dynamic balance degree detection device includes base and setting on base for carrying fan body mounting bracket, the mounting bracket is provided with the fixing member for fixing fan body, the base and mounting bracket are provided with flexible component for facilitating fan body transmission vibration, the base is provided with detection component for detecting the balance degree of fan body.The application has the effect of improving the balance degree detection precision of axial flow fan.

Description

Technical Field

[0001] This application relates to the field of fan testing equipment technology, and in particular to a dynamic balance testing device for axial flow fans. Background Technology

[0002] The axial fan, a core component of a vehicle's cooling system, is responsible for cooling the engine and radiator. During idling and low-speed operation, the fan provides forced air cooling, and its dynamic balance directly impacts the vehicle's NVH noise, chassis vibration, and the lifespan of the cooling system. Due to the complex operating conditions of automobiles, the fan operates under high and low temperatures and continuous high-speed rotation, placing high demands on the uniformity of the fan blade weight and the precision of its dynamic balance. Therefore, balance testing is necessary during the production of axial fans to ensure their quality.

[0003] In related technologies, a testing device for an axial fan includes a rigid base and a clamp set on the base for fixing and holding the fan. The base is provided with a balance sensor for testing the workpiece and a stop block for limiting the fan.

[0004] Regarding the aforementioned technologies, the inventors have discovered that in the testing process of existing axial flow fans, the tooling base is a rigid structure, which hinders the transmission of vibration during fan operation and results in insufficient accuracy in balance testing, thus requiring improvement. Summary of the Invention

[0005] To improve the accuracy of balance detection for axial fans, this application provides a dynamic balance detection device for axial fans.

[0006] The axial fan dynamic balance detection device provided in this application adopts the following technical solution: A dynamic balance detection device for an axial flow fan includes a base and a mounting bracket disposed on the base for supporting the fan body. The mounting bracket is provided with a fixing member for fixing the fan body. A flexible component is disposed between the base and the mounting bracket to facilitate the transmission of vibration by the fan body. A detection component for detecting the balance of the fan body is disposed on the base.

[0007] By adopting the above technical solution, the fastener fixes the fan body to the mounting bracket; the flexible component is set between the base and the mounting bracket, replacing the traditional rigid connection structure. The flexible component can undergo elastic deformation, allowing the vibration and imbalance generated by the fan body during operation to be smoothly transmitted to the detection component, reducing the obstruction of the rigid structure to the detection of the fan body's imbalance and vibration; the detection component detects the balance of the fan body, thereby accurately determining the degree of imbalance. This application, by replacing the traditional rigid structure with a flexible component, enables the detection component to more accurately obtain the vibration and balance data of the fan body, thereby improving the detection accuracy of the axial flow fan's balance.

[0008] Preferably, the flexible component includes a flexible pad, a positioning block, and a fastener; the flexible pad is disposed between the base and the mounting bracket, the positioning block is disposed on the base, and the side wall of the flexible pad has a positioning opening for the positioning block to abut against; the fastener passes through the mounting bracket and the flexible pad to fix the base.

[0009] By adopting the above technical solution, a flexible pad is sandwiched between the base and the mounting bracket, providing elastic transmission of vibrations and imbalances generated by the fan's operation, thus avoiding the obstruction of detecting fan imbalances that rigid connections would otherwise require. A positioning block is embedded in the positioning opening of the flexible pad, limiting its horizontal displacement, preventing slippage during vibration, and positioning the pad during installation. Fasteners securely connect the mounting bracket and the flexible pad to the base, ensuring the vertical stability of the mounting bracket. The cooperation of the flexible pad, positioning block, and fasteners maintains a flexible connection between the mounting bracket and the base while ensuring precise installation.

[0010] Preferably, the detection component includes a balance sensor, a laser probe, a display, a control unit, and a reflective sticker; the balance sensor is disposed at the bottom of the fan body to detect the balance of the fan body; the laser probe is disposed on the base to measure the rotational speed of the fan body; the control unit is disposed on the base, and the balance sensor, laser probe, and display are all controlled by the control unit; the display is disposed on the base to display the detection data; and the reflective sticker is disposed on the fan body to assist in marking the fan blades of the fan body.

[0011] By adopting the above technical solution, the balance sensor is installed at the bottom of the fan body, and the vibration signal transmitted by the flexible component directly collects the balance data when the fan body rotates. The laser probe and reflective sticker are used together to measure the fan body speed, and the fan blade at the corresponding position of the reflective sticker is defined as the starting point. The fan blades are marked sequentially along the clockwise direction of the fan body to locate and mark each fan blade, thereby facilitating the determination of the specific fan blade position corresponding to the imbalance. The control unit receives and processes the signals from the balance sensor and the laser probe, converts the vibration data into the imbalance, and determines the specific fan blades that need to be weighted or reduced under different speed conditions by combining the speed information of the laser probe. Finally, the detection data and correction instructions are displayed on the display.

[0012] Preferably, the mounting bracket is provided with a suspension component to ensure that the fan body can rotate freely; the base is provided with a positioning component to assist in the balanced installation of the fan body.

[0013] By adopting the above technical solution, the suspension component provides the fan body with multi-directional rotational freedom, enabling the fan body to rotate freely during the testing process and truly reflect its own imbalance state, avoiding the constraint of the mounting bracket on the rotational movement of the fan body, thus masking the vibration signal; the positioning component provides auxiliary support and positioning for the suspension component during fan body installation or before and after testing, preventing the suspension component from being damaged due to excessive swinging in the non-testing state; and ensuring the horizontal state of the fan body when it is installed for testing, further improving the detection accuracy of the fan body's balance.

[0014] Preferably, the suspension assembly includes a rotating ring, side rotating shafts, a rotating frame, end rotating shafts, and a suspension frame; the rotating ring is rotatably mounted on the mounting frame around its own central axis, and the central axis of the rotating ring is perpendicular to the base; the side rotating shafts are arranged opposite to each other on both sides of the mounting frame, and the side rotating shafts are rotatably connected to the rotating ring, and the rotating frame is rotatably mounted between the two sets of side rotating shafts; the end rotating shafts are arranged opposite to each other at both ends of the mounting frame, and the end rotating shafts are rotatably connected to the rotating frame, and the suspension frame is rotatably mounted between the two sets of end rotating shafts; the fan body is located inside the suspension frame, and the fixing component is located on the suspension frame.

[0015] By adopting the above technical solution, the rotating frame rotates around an axis perpendicular to the base. The rotating frame is connected to the rotating ring via a side rotating shaft and swings around the axis of the side rotating shaft. The suspension frame is connected to the rotating frame via an end rotating shaft and swings around the axis of the end rotating shaft. The axes of the side rotating shaft and the end rotating shaft intersect each other. The suspension frame and the fan body inside it can rotate freely in multiple directions. When the fan body rotates, the suspension component adaptively adjusts its posture accordingly, minimizing the interference of external constraints on the unbalanced state and vibration signal of the fan body, and improving the detection accuracy of the detection component for the balance data of the fan body.

[0016] Preferably, the positioning component includes a horizontal plate and a lifting component; the horizontal plate is flexibly mounted on the base, and the lifting component is mounted on the base to drive the horizontal plate to conform to the bottom wall of the suspension frame.

[0017] By adopting the above technical solution, the lifting component drives the horizontal plate to rise and fit against the bottom wall of the suspension frame, providing auxiliary support and positioning for the suspension frame, so that the suspension frame remains horizontal and stable when the fan body is installed or when not being tested; when the test begins, the lifting component drives the horizontal plate to fall and detach from the suspension frame, releasing the constraint on the suspension frame and allowing the suspension frame to return to a free floating state, ensuring that the unbalanced state and vibration of the fan body can be accurately transmitted to the testing components.

[0018] Preferably, the base is provided with an additive component for adding weight to the fan blades of the fan body based on balance detection data; the base is provided with an adjustment component for adjusting the position of the fan body to align with the additive component, and both the additive component and the adjustment component are controlled by the detection component.

[0019] By adopting the above technical solution, after the detection component detects the imbalance of the fan body and determines the target fan blade, the control adjustment component drives the fan body to rotate, so that the target fan blade is rotated to the position aligned with the additive component; the positioning component straightens the fan body, and then the additive component is controlled to spray weight-adding coating on the surface of the target fan blade to correct the weight of the fan blade; both the additive component and the adjustment component are controlled by the detection component, forming an automated closed-loop control of detection, positioning, adjustment and correction, which improves the efficiency of balance detection and correction.

[0020] Preferably, the additive manufacturing assembly includes a moving frame, a moving cylinder, a feed pipe, a pressurizing pump, an atomizing nozzle, an air duct, an air intake component, a heating component, and a gathering component. The moving frame is slidably mounted on a base, and the moving cylinder is mounted on the base to drive the moving frame closer to or away from the fan body. The feed pipe is mounted on the moving frame, the pressurizing pump is mounted on the feed pipe, and the atomizing nozzle is mounted on the end of the feed pipe facing the fan body. The air duct passes through the feed pipe to cover the atomizing nozzle. The air intake component is mounted on the air duct to blow air towards the fan body. The heating component is mounted on the air duct to heat the airflow. The gathering component is mounted on the air duct to gather material towards individual fan blades of the fan body. The moving cylinder, pressurizing pump, air intake component, heating component, and gathering component are all controlled by a detection component.

[0021] By adopting the above technical solution, the detection component controls the moving cylinder to drive the moving frame to move towards the fan body, so that the atomizing nozzle is close to the target fan blade; the pressurizing pump delivers the weight-adding coating to the atomizing nozzle through the feed pipe, the atomizing nozzle atomizes and sprays the coating, and the aggregator confines the spraying range to a single fan blade area; the air-exhausting component and the heating component work together to generate a hot airflow, which blows the atomized coating towards the fan body through the air duct, and the hot airflow accelerates the drying and curing of the coating; all the execution components are uniformly controlled by the detection component, realizing the automated operation of the additive correction process.

[0022] Preferably, the collecting component includes a collecting tube, a lifting cylinder, a baffle tube, and a baffle ring plate; the collecting tube is slidably sleeved on the end of the feeding tube facing the fan body, the lifting cylinder is disposed on the air guide tube to drive the collecting tube to move up and down, and a number of ventilation holes are opened through the collecting tube; the baffle tube is mounted on the outside of the collecting tube, and the lifting cylinder is controlled by a detection component; the baffle ring plate is disposed between the end of the collecting tube facing the base and the end of the baffle tube facing the base to collect additive coating.

[0023] By adopting the above technical solution, the detection component controls the lifting cylinder to drive the gathering tube to extend, so that the port of the gathering tube approaches and covers the surface of the target fan blade, and guides the atomized coating to a single target fan blade area, reducing the phenomenon of atomized coating being sprayed onto adjacent fan blades; the ventilation holes on the gathering tube allow the airflow in the guide tube to pass through evenly, and the baffle tube is set outside the gathering tube to block the coating from spreading outward, further ensuring the accuracy of spraying; the baffle ring plate collects the weight-adding coating that passes through the ventilation holes and reduces the phenomenon of weight-adding coating being scattered by the airflow inside the baffle tube.

[0024] Preferably, the adjustment assembly includes a moving block, an adjusting wheel, an adjusting motor, and a telescopic cylinder; the moving block is slidably disposed on the base, and the adjusting wheel is rotatably disposed on the base to abut against the outer peripheral wall of the rotating ring; the adjusting motor is disposed on the moving block to drive the adjusting wheel to rotate; the telescopic cylinder is disposed on the base to drive the moving block to move closer to or away from the rotating ring; both the adjusting motor and the telescopic cylinder are controlled by the detection assembly.

[0025] By adopting the above technical solution, the detection component controls the telescopic cylinder to drive the moving block to move towards the rotating ring, so that the peripheral wall of the adjusting wheel presses tightly against the outer peripheral wall of the rotating ring; the detection component controls the adjusting motor to drive the adjusting wheel to rotate, and the adjusting wheel rotates around its own central axis through friction, thereby driving the suspension frame and the fan body to rotate synchronously, so that the target fan blade that needs to be weighted is precisely rotated to the position aligned with the additive component.

[0026] In summary, this application includes at least one of the following beneficial technical effects: This application replaces the traditional rigid connection structure with flexible components such as flexible pads, so that the unbalanced state and vibration generated by the operation of the fan body can be smoothly transmitted to the detection component, reducing the obstruction of the detection signal by the rigid structure; at the same time, the suspension component releases the rotational degrees of freedom in multiple directions, preserving the true unbalanced state and vibration characteristics of the fan body to the maximum extent, thereby significantly improving the accuracy of balance detection. By using the detection component to accurately detect the imbalance and mark the target fan blades, combined with the adjustment component to adjust the position of the fan body and the additive component to accurately spray and add weight to the target fan blades, and with both the additive component and the adjustment component being controlled by the detection component, an automated closed-loop process of detection, positioning, adjustment and correction is formed, which not only improves the detection efficiency, but also realizes the automatic correction of the balance. By cooperating with the lifting component in the positioning assembly, the suspension assembly is assisted in the installation and non-inspection process, so that the suspension frame remains horizontal and stable when the fan body is installed. This reduces the structural damage caused by the suspension assembly being in a free swing state for a long time, extends the service life of the device, improves the horizontal state of the fan body during installation, and improves the accuracy of balance detection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an axial fan dynamic balance detection device according to an embodiment of this application.

[0028] Figure 2 It is a cross-sectional schematic diagram used to illustrate the connection relationship between the suspension component and the positioning component.

[0029] Figure 3 It is a cross-sectional schematic diagram used to illustrate the internal structure of additive components.

[0030] Explanation of reference numerals in the attached figures: 1. Base; 11. Mounting bracket; 12. Fan body; 13. Fixing component; 2. Flexible component; 21. Flexible pad; 211. Positioning port; 22. Positioning block; 23. Fastener; 3. Detection component; 31. Balance sensor; 32. Laser probe; 33. Display; 34. Control component; 35. Reflective sticker; 4. Suspension component; 41. Rotating ring; 42. Side pivot; 43. Rotating frame; 44. End pivot; 45. Suspension frame; 5. Positioning component; 51. Water 52. Flat plate; 6. Lifting component; 7. Additive assembly; 8. Moving frame; 9. Moving cylinder; 10. Feed pipe; 11. Pressurizing pump; 12. Atomizing nozzle; 13. Air guide pipe; 14. Exhaust fan; 15. Heating component; 16. Converging component; 17. Converging pipe; 18. Ventilation hole; 19. Lifting cylinder; 10. Material baffle pipe; 11. Material baffle ring plate; 12. Adjusting assembly; 13. Moving block; 14. Adjusting wheel; 15. Adjusting motor; 16. Telescopic cylinder. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] This application discloses a dynamic balance detection device for axial flow fans to improve the accuracy of balance detection for axial flow fans.

[0033] Reference Figure 1 and Figure 2 A dynamic balance testing device for an axial flow fan includes a base 1, on which a mounting bracket 11 is mounted to support a fan body 12. A fixing member 13 is mounted on the mounting bracket 11 to secure the fan body 12 to it; specifically, the fixing member 13 is a toggle clamp or a cylinder-driven pressing block. A flexible component 2 is installed between the base 1 and the mounting bracket 11, and a testing component 3 is mounted on the base 1.

[0034] Reference Figure 1 and Figure 2 The flexible component 2 includes a flexible pad 21, a positioning block 22, and a fastener 23. The flexible pad 21 is sandwiched between the base 1 and the mounting bracket 11. Specifically, the flexible pad 21 is a rubber pad or a polyurethane elastic pad, capable of elastic deformation. The positioning block 22 is fixedly installed on the upper surface of the base 1 by bolts. The side wall of the flexible pad 21 has a positioning opening 211, and the positioning block 22 is embedded in the positioning opening 211 to limit the horizontal displacement of the flexible pad 21. The fastener 23 is specifically a bolt, which passes through the mounting bracket 11 and the flexible pad 21. The lower end of the fastener 23 is threadedly connected to the base 1, fixing the mounting bracket 11 and the flexible pad 21 to the base 1.

[0035] Reference Figure 1 and Figure 2 The detection component 3 includes a balance sensor 31, a laser probe 32, a display 33, a control unit 34, and a reflective sticker 35. The balance sensor 31 is installed at the bottom of the fan body 12 and is used to collect balance data when the fan body 12 rotates. The reflective sticker 35 is adhesively attached to the side wall of the fan body 12 to mark each fan blade. The laser probe 32 is mounted on the base 1 via a bracket, with the emitting end of the laser probe 32 facing the fan blade area of ​​the fan body 12, and works with the reflective sticker 35 to measure the rotational speed of the fan body 12.

[0036] Reference Figure 1 and Figure 2 The control component 34 is fixedly mounted on the base 1. The control component 34 is specifically a PLC controller or an industrial computer, and the balance sensor 31, laser probe 32, and display 33 are all electrically connected to the control component 34. The display 33 is mounted on the base 1 and is used to display the detection data received by the control component 34.

[0037] Reference Figure 1 and Figure 2 A suspension component 4 is mounted on the mounting bracket 11, which provides multi-directional rotational freedom for the fan body 12. A positioning component 5 is mounted on the base 1, which provides auxiliary support for the suspension component 4 when the fan body 12 is being installed or when not being tested.

[0038] Reference Figure 1 and Figure 2 The suspension assembly 4 includes a rotating ring 41, side rotating shafts 42, a rotating frame 43, an end rotating shaft 44, and a suspension frame 45. The rotating ring 41 is rotatably mounted on the mounting frame 11 via ball bearings and can rotate about an axis perpendicular to the base 1. There are two sets of side rotating shafts 42, which are respectively installed opposite to each other on both sides of the rotating ring 41, and the axis of the side rotating shafts 42 is horizontal. One end of the side rotating shaft 42 is rotatably connected to the rotating ring 41. The rotating frame 43 is a ring frame structure located inside the rotating ring 41. The two sides of the rotating frame 43 are fixedly connected to the two sets of side rotating shafts 42 respectively, and the rotating frame 43 can swing relative to the rotating ring 41 about the axis of the side rotating shafts 42.

[0039] Reference Figure 1 and Figure 2 Two sets of end shafts 44 are installed opposite each other at both ends of the rotating frame 43. The axis of the end shafts 44 is horizontal and perpendicular to the axis of the side shafts 42. One end of the end shaft 44 is rotatably connected to the rotating frame 43. The suspension frame 45 is fixedly installed between the two sets of end shafts 44 and can swing relative to the rotating frame 43 around the axis of the end shafts 44. The fan body 12 is installed inside the suspension frame 45, and the fixing member 13 is installed on the suspension frame 45 to lock and fix the fan body 12 in the suspension frame 45. The balance sensor 31 is fixedly installed at the bottom of the suspension frame 45.

[0040] Reference Figure 1 and Figure 2 The positioning component 5 includes a horizontal plate 51 and a lifting element 52. The horizontal plate 51 is slidably mounted on the base 1, and its sliding direction is vertical. The lifting element 52 is specifically a cylinder or an electric push rod, fixedly mounted on the base 1, and its output end is fixedly connected to the horizontal plate 51. When the lifting element 52 drives the horizontal plate 51 to rise, the upper surface of the horizontal plate 51 adheres to the bottom wall of the suspension frame 45, providing auxiliary support and positioning for the suspension frame 45. When the lifting element 52 drives the horizontal plate 51 to descend, the horizontal plate 51 disengages from the suspension frame 45, and the suspension frame 45 returns to its free-floating state.

[0041] Reference Figure 1 and Figure 3An additive manufacturing assembly 6 and an adjustment assembly 7 are mounted on the base 1. Both the additive manufacturing assembly 6 and the adjustment assembly 7 are controlled by the control element 34 of the detection assembly 3. The additive manufacturing assembly 6 is used to spray and add weight to the target fan blades of the fan body 12 based on the balance detection data. The adjustment assembly 7 is used to drive the fan body 12 to rotate, so that the target fan blades are aligned with the additive manufacturing assembly 6.

[0042] Reference Figure 1 and Figure 3 The additive component 6 includes a movable frame 61, a movable cylinder 62, a feed pipe 63, a pressurizing pump 64, an atomizing nozzle 65, an air guide pipe 66, an air duct 67, a heating element 68, and a gathering element 69. The movable frame 61 is slidably mounted on the base 1, and the sliding direction of the movable frame 61 is towards or away from the fan body 12. The movable cylinder 62 is fixedly mounted on the base 1, and the output end of the movable cylinder 62 is fixedly connected to the movable frame 61.

[0043] Reference Figure 1 and Figure 3 The feed pipe 63 is fixedly installed on the movable frame 61, and one end of the feed pipe 63 is connected to the weight-enhancing paint storage tank. The pressure pump 64 is installed on the movable frame 61 and is connected to the feed pipe 63, and is used to pressurize and deliver the weight-enhancing paint. The atomizing nozzle 65 is installed at the end of the feed pipe 63 facing the fan body 12, and is used to atomize and spray the paint.

[0044] Reference Figure 1 and Figure 3 The air duct 66 is fitted onto the outside of the feed pipe 63 and covers the atomizing nozzle 65. The air duct 67 is specifically a fan, installed on top of the air duct 66, with the air outlet direction of the air duct 67 facing the fan body 12. The heating element 68 is specifically a heating wire, installed inside the air duct 66, used to heat the flowing air. The atomizing element 69 is installed at the end of the air duct 66 facing the fan body 12, used to concentrate and guide the atomized coating to a single fan blade area. The lifting cylinders 692 of the moving cylinder 62, the pressurizing pump 64, the air duct 67, the heating element 68, and the atomizing element 69 are all electrically connected to the control unit 34.

[0045] Reference Figure 1 and Figure 3 The gathering component 69 includes a gathering pipe 691, a lifting cylinder 692, a baffle pipe 693, and a baffle ring plate 694. The gathering pipe 691 is slidably sleeved on the end of the feed pipe 63 facing the fan body 12, and can slide along the axial direction of the feed pipe 63 to align individual fan blades. Multiple sets of ventilation holes 6911 are formed through the pipe wall of the gathering pipe 691, and the ventilation holes 6911 are evenly distributed along the circumference of the gathering pipe 691. The lifting cylinder 692 is fixedly installed on the outer wall of the air guide pipe 66, and the output end of the lifting cylinder 692 is fixedly connected to the gathering pipe 691, and the lifting cylinder 692 is controlled by the control component 34.

[0046] Reference Figure 1 and Figure 3 A baffle ring 694 is fixedly connected to the outer peripheral wall of the collecting tube 691 facing the end of the fan body 12. A baffle tube 693 is fixedly sleeved on the outer peripheral wall of the baffle ring 694, and the baffle tube 693 is fixedly connected to the outer peripheral wall of the collecting tube 691 by a short rod. The baffle tube 693 covers the part of the collecting tube 691 with ventilation holes 6911, and a gap is left between the two so that the airflow inside the collecting tube 691 flows into the baffle tube 693 through the ventilation holes 6911, and the weight-adding coating passing through the ventilation holes 6911 is collected by the baffle ring 694.

[0047] Reference Figure 1 and Figure 3 The adjusting assembly 7 includes a moving block 71, an adjusting wheel 72, an adjusting motor 73, and a telescopic cylinder 74. The moving block 71 is slidably mounted on the base 1, and the sliding direction of the moving block 71 is towards or away from the rotating ring 41. The adjusting wheel 72 is rotatably mounted on the moving block 71 via a bearing, and the peripheral wall of the adjusting wheel 72 is used to abut against the outer peripheral wall of the rotating ring 41.

[0048] Reference Figure 1 and Figure 3 The adjusting motor 73 is fixedly mounted on the movable block 71, and the output shaft of the adjusting motor 73 is connected to the adjusting wheel 72 via a transmission connection. The telescopic cylinder 74 is fixedly mounted on the base 1, and the output end of the telescopic cylinder 74 is fixedly connected to the movable block 71. Both the adjusting motor 73 and the telescopic cylinder 74 are controlled by the control component 34. The implementation principle of the axial fan dynamic balance detection device in this application is as follows: Before testing, the lifting component 52 drives the horizontal plate 51 to rise and adhere to the bottom wall of the suspension frame 45, keeping the suspension frame 45 horizontal and stable. The fan body 12 is placed inside the suspension frame 45 and locked in place by the fixing component 13. The lifting component 52 drives the horizontal plate 51 to descend and detach from the suspension frame 45, and the suspension frame 45 returns to its free-floating state. The reflective sticker 35 marks the positioning of each fan blade.

[0049] During testing, the fan body 12 is powered on and rotates. The laser probe 32 measures the rotational speed of the fan body 12 to measure its balance data at the corresponding rated speed. The imbalance and vibration force generated by the operation of the fan body 12 are transmitted to the flexible pad 21, suspension frame 45, end shaft 44, rotating frame 43, side shaft 42, and rotating ring 41, causing the fan body 12 to tilt. The balance sensor 31 collects vibration signals based on the imbalance of the fan body 12 and converts them into balance data. The control unit 34 processes the data, determines the target fan blade position corresponding to the imbalance, and displays the detection results on the display 33, thereby improving the balance detection accuracy of the axial flow fan.

[0050] After the inspection is completed, the lifting component 52 drives the horizontal plate 51 to rise and fit against the bottom wall of the suspension frame 45, providing auxiliary support for the suspension frame 45 again. The control component 34 controls the telescopic cylinder 74 to drive the moving block 71 to move towards the rotating ring 41, so that the adjusting wheel 72 presses against the outer peripheral wall of the rotating ring 41. The control component 34 controls the adjusting motor 73 to drive the adjusting wheel 72 to rotate. The adjusting wheel 72 drives the rotating ring 41 to rotate through friction. The rotating ring 41 drives the suspension frame 45 and the fan body 12 to rotate synchronously, so that the target fan blade rotates to the position aligned with the additive component 6.

[0051] Control unit 34 controls the moving cylinder 62 to drive the moving frame 61 to move towards the fan body 12, and the atomizing nozzle 65 approaches the target fan blade. Control unit 34 controls the lifting cylinder 692 to drive the gathering tube 691 to extend, and the port of the gathering tube 691 approaches and covers the surface of the target fan blade. Control unit 34 controls the pressurizing pump 64 and the atomizing nozzle 65 to atomize and spray the weight-adding coating. At the same time, it controls the air intake 67 and the heating element 68 to generate a hot airflow. The hot airflow blows the atomized coating towards the target fan blade, and the gathering tube 691 confines the spraying area to a single target fan blade area. The hot airflow accelerates the drying and curing of the coating. After spraying is completed, all components are reset, completing a balance check and correction operation.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dynamic balance detection device for an axial flow fan, characterized in that: It includes a base (1) and a mounting bracket (11) disposed on the base (1) for supporting the fan body (12). The mounting bracket (11) is provided with a fixing member (13) for fixing the fan body (12). A flexible component (2) is disposed between the base (1) and the mounting bracket (11) to facilitate the transmission of vibration of the fan body (12). A detection component (3) for detecting the balance of the fan body (12) is disposed on the base (1).

2. The axial flow fan dynamic balance detection device according to claim 1, characterized in that: The flexible component (2) includes a flexible pad (21), a positioning block (22), and a fastener (23). The flexible pad (21) is disposed between the base (1) and the mounting bracket (11). The positioning block (22) is disposed on the base (1). The side wall of the flexible pad (21) is provided with a positioning port (211) for the positioning block (22) to abut. The fastener (23) passes through the mounting bracket (11) and the flexible pad (21) to fix the base (1).

3. The axial flow fan dynamic balance detection device according to claim 1, characterized in that: The detection component (3) includes a balance sensor (31), a laser probe (32), a display (33), a control unit (34), and a reflective sticker (35). The balance sensor (31) is located at the bottom of the fan body (12) to detect the balance of the fan body (12). The laser probe (32) is located on the base (1) to measure the rotational speed of the fan body (12). The control unit (34) is located on the base (1), and the balance sensor (31), the laser probe (32), and the display (33) are all controlled by the control unit (34). The display (33) is located on the base (1) to display the detection data. The reflective sticker (35) is located on the fan body (12) to assist in marking the fan blades of the fan body (12).

4. The axial flow fan dynamic balance detection device according to claim 1, characterized in that: The mounting bracket (11) is provided with a suspension component (4) to ensure that the fan body (12) can rotate freely; the base (1) is provided with a positioning component (5) to assist the fan body (12) in balanced installation.

5. The axial flow fan dynamic balance detection device according to claim 4, characterized in that: The suspension assembly (4) includes a rotating ring (41), a side rotating shaft (42), a rotating frame (43), an end rotating shaft (44), and a suspension frame (45). The rotating ring (41) is rotatably mounted on the mounting frame (11) around its own central axis, and the central axis of the rotating ring (41) is perpendicular to the base (1). The side rotating shaft (42) is disposed opposite to both sides of the mounting frame (11), and the side rotating shaft (42) is rotatably connected to the rotating ring (41). The rotating frame (43) is rotatably disposed between the two sets of side rotating shafts (42). The end rotating shaft (44) is disposed opposite to both ends of the mounting frame (11), and the end rotating shaft (44) is rotatably connected to the rotating frame (43). The suspension frame (45) is rotatably disposed between the two sets of end rotating shafts (44). The fan body (12) is located inside the suspension frame (45), and the fixing member (13) is located on the suspension frame (45).

6. The axial fan dynamic balance detection device according to claim 5, characterized in that: The positioning component (5) includes a horizontal plate (51) and a lifting component (52); the horizontal plate (51) is raised and lowered on the base (1), and the lifting component (52) is set on the base (1) to drive the horizontal plate (51) to fit against the bottom wall of the suspension frame (45).

7. The axial fan dynamic balance detection device according to claim 6, characterized in that: An additive component (6) is provided on the base (1) for adding weight to the fan blades of the fan body (12) according to the balance detection data; an adjustment component (7) is provided on the base (1) for adjusting the position of the fan body (12) to align with the additive component (6), and both the additive component (6) and the adjustment component (7) are controlled by the detection component (3).

8. The axial fan dynamic balance detection device according to claim 7, characterized in that: The additive component (6) includes a movable frame (61), a movable cylinder (62), a feed pipe (63), a pressurizing pump (64), an atomizing nozzle (65), an air duct (66), an air intake component (67), a heating component (68), and an aggregating component (69); the movable frame (61) is slidably mounted on the base (1), and the movable cylinder (62) is mounted on the base (1) to drive the movable frame (61) closer to or further away from the fan body (12); the feed pipe (63) is mounted on the movable frame (61), the pressurizing pump (64) is mounted on the feed pipe (63), and the atomizing nozzle (65) is mounted on the feed pipe (63). The end of the fan body (12) is facing the fan body (12); the air duct (66) is passed through the feed pipe (63) to cover the atomizing nozzle (65); the air duct (67) is set on the air duct (66) to blow air towards the fan body (12); the heating element (68) is set on the air duct (66) to heat the airflow; the gathering element (69) is set on the air duct (66) to gather material towards the individual fan blades of the fan body (12); the moving cylinder (62), the pressurizing pump (64), the air duct (67), the heating element (68) and the gathering element (69) are all controlled by the detection component (3).

9. The axial flow fan dynamic balance detection device according to claim 8, characterized in that: The gathering component (69) includes a gathering tube (691), a lifting cylinder (692), a baffle tube (693), and a baffle ring plate (694). The gathering tube (691) is slidably sleeved on the end of the feeding tube (63) facing the fan body (12). The lifting cylinder (692) is set on the air guide tube (66) to drive the gathering tube (691) to move up and down. Several sets of ventilation holes (6911) are opened through the gathering tube (691). The baffle tube (693) is mounted on the outside of the gathering tube (691), and the lifting cylinder (692) is controlled by the detection component (3). The baffle ring plate (694) is set between the end of the gathering tube (691) facing the base (1) and the end of the baffle tube (693) facing the base (1) to collect additive coating.

10. The axial fan dynamic balance detection device according to claim 7, characterized in that: The adjustment assembly (7) includes a moving block (71), an adjustment wheel (72), an adjustment motor (73), and a telescopic cylinder (74); the moving block (71) is slidably disposed on the base (1), and the adjustment wheel (72) is rotatably disposed on the base (1) to abut against the outer peripheral wall of the rotating ring (41); the adjustment motor (73) is disposed on the moving block (71) to drive the adjustment wheel (72) to rotate; the telescopic cylinder (74) is disposed on the base (1) to drive the moving block (71) to move closer to or away from the rotating ring (41), and both the adjustment motor (73) and the telescopic cylinder (74) are controlled by the detection assembly (3).

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