Cross-flow fan blade detection equipment and control method

Abstract

The invention discloses cross-flow fan blade detection equipment and a control method. According to the cross-flow fan blade detection equipment, the functions of body torsion testing, rotation driving, wind speed measuring and the like are integrated on the same rack. Multiple performance tests can be continuously completed only through one-time clamping, and equipment does not need to be disassembled and replaced back and forth like a traditional mode. Repeated positioning is avoided, the operation time is shortened, and the test efficiency and the result consistency are improved. The technical problems that in the prior art, testing procedures are scattered, consumed time is long, and efficiency is low are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of automation equipment technology, and in particular to a continuous flow fan blade detection device and control method. Background Technology

[0002] As a core component in ventilation equipment such as household air conditioners, fresh air systems, and air purifiers, the performance of cross-flow fan blades directly affects the airflow output, operating noise, energy efficiency, and service life of the entire unit. To ensure product quality, key performance parameters of the cross-flow fan blades must be tested before leaving the factory, including: structural torsional strength, rotational dynamic characteristics, airflow performance, and dynamic balance.

[0003] However, in existing technologies, the aforementioned performance tests are typically performed using a decentralized, manual operation method. Specifically, different specialized equipment is required for different parameters. For example, the body torque test needs to be conducted on a dedicated torque tester, where the blades are manually clamped and torsional force is applied; airflow and speed tests require the blades to be installed on a separate wind tunnel test bench; and dynamic balancing testing needs to be carried out separately on a dynamic balancing instrument. This multi-equipment, multi-station testing mode necessitates repeated disassembly and reassembly of the cross-flow fan blades for each test, which is not only cumbersome but also significantly increases operating time and labor costs. This results in a significant inefficiency in the testing of cross-flow fan blades using existing technologies. Summary of the Invention

[0004] The embodiments of the present invention provide a cross-flow fan blade testing device and control method, which aims to solve the technical problem of low efficiency in testing various performance parameters of cross-flow fan blades under the prior art.

[0005] In a first aspect, the present invention provides a cross-flow fan blade testing device comprising: a frame; a body torque testing unit connected to the frame, the body torque testing unit being detachably connected to both ends of the cross-flow fan blade, the body torque testing unit driving one end of the cross-flow fan blade to twist relative to the other end along the rotation axis of the cross-flow fan blade; a rotation drive testing unit connected to the frame, the rotation drive testing unit being detachably coaxially connected to the cross-flow fan blade, the rotation drive testing unit driving the cross-flow fan blade to rotate; and a wind speed testing unit connected to the frame, the wind speed testing unit being disposed around the cross-flow fan blade, the wind speed testing unit being used to obtain the wind speed when the cross-flow fan blade rotates.

[0006] Secondly, the present invention provides a cross-flow fan blade detection and control method, applied to the cross-flow fan blade detection device described above. The method includes: connecting the cross-flow fan blade for testing to the rotary drive testing unit, and fixing the axial direction of the cross-flow fan blade; driving the cross-flow fan blade to rotate according to a preset wind speed test speed through the rotary drive testing unit, and obtaining the wind speed when the cross-flow fan blade rotates through the wind speed testing unit, recording it as the speed and air volume test results; driving the cross-flow fan blade to rotate through the rotary drive testing unit, and controlling the rotation according to a preset base torque through the body torque testing unit. The test force clamps one end of the cross-flow fan blade connected to the rotary drive test unit, monitors the feedback torque value of the rotary drive test unit, and records it as the link shaft torque test result; the body torque test unit clamps both ends of the cross-flow fan blade, and drives one end of the cross-flow fan blade to perform a torsion test relative to the other end according to a preset body torque, obtains the feedback torque value of the torque test unit, and records it as the link shaft torque test result; each test result is compared with a preset pass / fail rule to generate pass / fail judgment information, and a traceable record is generated based on each test result.

[0007] Compared with the prior art, the beneficial effects of the present invention are: In the technical solution of this invention, functions such as body torque testing, rotation drive, and wind speed measurement are integrated onto the same frame. Multiple performance tests can be completed continuously with a single clamping, eliminating the need for repeated disassembly and equipment replacement as in traditional methods. This avoids repetitive positioning, reduces operation time, and improves testing efficiency and result consistency. It effectively solves the technical problems of dispersed processes, long processing times, and low efficiency in existing testing technologies. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 2 These are two side views, one from the front and one from the side, of the cross-flow fan blade testing device according to an embodiment of the present invention. Figure 3 This is a partial enlarged view of the structural schematic diagram of the cross-flow fan blade testing device according to an embodiment of the present invention. (Source: Schematic diagram) Figure 4A partial enlarged view A is a schematic diagram of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 5 This is a partial enlarged view B of the structural schematic diagram of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 6 This is a front view of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 7 This is a left view of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 8 This is a right view of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 9 This is a top view of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 10 This is a cross-sectional view C of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 11 D is a partially enlarged view of the cross-flow fan blade testing device according to an embodiment of the present invention; Figure 12 This is a first flowchart of the cross-flow fan blade detection and control method according to an embodiment of the present invention; Figure 13 This is a second flowchart of the cross-flow fan blade detection and control method according to an embodiment of the present invention; Figure 14 This is the third flowchart of the cross-flow fan blade detection and control method according to an embodiment of the present invention; Figure label explanation: 10. Crossflow fan blades; 20. Frame; 21. Clearance holes; 30. Body torque testing unit; 31. First clamping assembly; 311. First cylinder; 312. First semi-circular clamping plate; 32. Second clamping assembly; 321. Second cylinder; 322. Second semi-circular clamping plate; 331. First bearing plate; 332. Second bearing plate; 341. Hollow rotary platform; 342. Torsion motor; 35. End adjustment linear motion module; 40. Rotary drive test unit; 41. Drive motor; 42. Torque sensor; 43. Coupling; 44. Centering roller assembly; 441. Driven wheel; 45. Drive shaft; 50. Wind speed testing unit; 51. Air duct; 52. Anemometer; 60. Bending strength testing unit; 61. First linear motion module; 63. Third linear motion module; 64. Pressure loading component; 65. Pressure plate; 651. Concave arc surface; 70. Balance test unit; 71. Distance sensor; 72. Second linear motion module; 81. Industrial control all-in-one computer; 82. PLC controller. Detailed Implementation

[0010] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0011] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0012] To address the technical problem of low efficiency in testing various performance parameters of cross-flow fan blades 10 in existing technologies, this invention proposes a cross-flow fan blade testing device. (Refer to...) Figures 1 to 11 The cross-flow fan blade testing device includes: a frame 20; a body torque testing unit 30 connected to the frame 20, the body torque testing unit 30 being detachably connected to both ends of the cross-flow fan blade 10, the body torque testing unit 30 driving one end of the cross-flow fan blade 10 to twist relative to the other end along the rotation axis of the cross-flow fan blade 10; a rotation drive testing unit 40 connected to the frame 20, the rotation drive testing unit 40 being detachably coaxially connected to the cross-flow fan blade 10, the rotation drive testing unit 40 driving the cross-flow fan blade 10 to rotate; and a wind speed testing unit 50 connected to the frame 20, the wind speed testing unit 50 being disposed on the periphery of the cross-flow fan blade 10, the wind speed testing unit 50 being used to obtain the wind speed when the cross-flow fan blade 10 rotates.

[0013] The so-called frame 20 refers to the equipment mounting platform structure, which constitutes the supporting foundation of the equipment and is used to support and fix various functional units. The cross-flow fan blade 10 to be tested is placed horizontally on the frame 20, and different performance parameters are detected through multiple adjustable test units. The body torque test unit 30 is connected to the frame 20 and is used to test the torsional resistance of the overall structure of the cross-flow fan blade 10. Specifically, the body torque test unit 30 includes a first clamping assembly 31 and a second clamping assembly 32, which are detachably set on the periphery of the two ends of the cross-flow fan blade 10 respectively; when the test starts, the two clamping assemblies are driven radially by pneumatic actuators, namely the first cylinder 311 and the second cylinder 321, and the opposing arc-shaped clamps hold the shaft head or hub of the two ends of the fan blade to achieve stable clamping. The first clamping assembly 31 is connected to a torsion drive mechanism. This drive mechanism uses a torsion motor 342 fixed on a first support plate 331 on the frame 20, which works in conjunction with a hollow rotating platform 341 driven by the torsion motor 342. Under the action of a control signal, the first clamping assembly 31 rotates around the axis of the cross-flow fan blade 10, torsionally twisting the structure according to test torque requirements such as 10 N.M, 25 N.M, 20 N.M, 35 N.M, and 50 N.M, thereby generating a torsional load on one end relative to the other end. At this time, the second clamping assembly 32 remains fixed. By acquiring the torque value fed back from the torsion motor 342 on the first support plate 331 and the deformation response of the fan blade, its structural stiffness and connection reliability are evaluated.

[0014] The rotary drive test unit 40 is also connected to the frame 20 and is detachably coaxially connected to one end of the cross-flow fan blade 10 to simulate the rotational operation of the fan blade in actual operation. The rotary drive test unit 40 includes a drive motor 41, a torque sensor 42, and a coupling 43. The drive motor 41 is connected to the D-hole end or shaft end of the cross-flow fan blade 10 via the coupling 43, driving the fan blade to rotate a full circumference after startup. The torque sensor 42 is located between the drive motor 41 and the fan blade, collecting the input torque during rotation in real time to determine the fan blade's start-stop performance, operational stability, and connection strength. Specifically, the output shaft of the drive motor 41 is connected to the shaft at one end of the torque sensor 42 via the coupling 43. The shaft at the other end of the torque sensor 42 is connected via the coupling 43 to a drive shaft 45 for engaging the D-hole end or shaft end of the cross-flow fan blade 10. This drive shaft 45 can be adapted to the specific dimensions of the cross-flow fan blade 10, with variations in the D-hole size or shaft end, and can be disassembled and replaced via the coupling 43. This allows the entire system to adapt to a wider variety of cross-flow fan blades 10. Furthermore, the rotary drive testing unit 40, in conjunction with the centering roller assembly 44, provides free support at the other end of the cross-flow fan blade 10, forming a stable rotation axis. The rotary drive testing unit 40 performs a torque strength test on the end bearing of the cross-flow fan blade 10. In this test, while the drive motor 41 drives the cross-flow fan blade 10, the first cylinder 311 drives the first semi-circular clamping plate 312 to clamp the cross-flow fan blade 10, providing torques such as 1 N.M, 5 N.M, 10 N.M, 15 N.M, 20 N.M, 25 N.M, and 30 N.M. The torque feedback data is obtained through the torque sensor 42 and used as a criterion for evaluating the torque strength of the end bearing of the cross-flow fan blade 10, thereby assessing whether the strength of the end bearing meets the design requirements. The wind speed testing unit 50 is located around the cross-flow fan blade 10 and is used to acquire the airflow velocity generated by it during rotation. The wind speed testing unit 50 includes a duct 51 and an anemometer 52, specifically a hot-wire anemometer 52. One end of the duct 51 is close to the outer periphery of the cross-flow fan blade 10 to guide the airflow generated by rotation, and the other end is equipped with the hot-wire anemometer 52, which accurately measures the airflow velocity using the principle of thermal sensing. By setting up the duct 51, interference from ambient airflow can be effectively avoided, improving the repeatability and accuracy of wind speed measurement. During the test, the rotation drive testing unit 40 drives the cross-flow fan blade 10 to rotate at different speeds, such as 500 rpm, 700 rpm, 1000 rpm, 1500 rpm, 2000 rpm, and 2500 rpm. The wind speed testing unit 50 simultaneously collects wind speed data at each speed point to evaluate whether the ventilation performance of the fan blade meets the design requirements.

[0015] By integrating various testing functions into the whole system and sharing the same control platform, namely the industrial all-in-one machine and PLC controller 82, the automated arrangement of the testing process and unified data management are realized. All test results can be automatically saved and uploaded to the EMS system, supporting subsequent quality traceability and statistical analysis.

[0016] Furthermore, referring to Figures 1 to 11 The cross-flow fan blade testing equipment also includes a bending strength testing unit 60 connected to the frame 20. The bending strength testing unit 60 is located on the periphery of the cross-flow fan blade 10, and the bending strength testing unit 60 can apply thrust to the cross-flow fan blade 10 along the radial direction of the cross-flow fan blade 10.

[0017] The bending strength testing unit 60 is connected to the frame 20 to detect the structural rigidity and deformation response of the fan blade body under pressure. The bending strength testing unit 60 allows the equipment to perform integrated multi-parameter tests on the fan blade's torsional performance, rotational airflow performance, and structural bending resistance at the same workstation without disassembling the workpiece, significantly improving the completeness and efficiency of the testing. The bending strength testing unit 60 includes a multi-axis linkage linear drive mechanism, specifically including a first linear motion module 61 for adjusting the position along the axial direction of the cross-flow fan blade 10. The first linear motion module 61 is mounted on the frame 20 and is used to adjust the lateral position of a third linear motion module 63 mounted on its moving end. This allows the pressure plate 65 mounted on the third linear motion module 63 to be adjusted according to the testing requirements, positioning it within the cross-flow fan blade 10 area. By controlling the lateral movement of the pressure plate 65, precise positioning along the axial direction of the cross-flow fan blade 10 is achieved, thereby accurately aligning the force application point with the area to be tested, such as the middle of the fan blade or a specific reinforcing rib. Using a dual linear motion module allows for more accurate and precise control of the pressure plate 65 during the downward pressure test, while also increasing the lateral movement speed of the entire pressure plate 65, thus improving test efficiency. The third linear motion module 63 drives the pressure plate 65 to move precisely downwards along the radial direction of the cross-flow fan blade 10. The inner surface of the downward pressure plate has a concave arc surface 651 that matches the outer contour of the fan blade, ensuring uniform contact during pressure application and avoiding abnormal deformation or damage caused by localized stress concentration. When the test starts, the control system controls the third linear motion module 63 to slowly lower the pressure plate 65 according to a preset program until it contacts the surface of the cross-flow fan blade 10 and applies a set thrust, such as 10 N.M, 25 N.M, 20 N.M, 35 N.M, 50 N.M, etc. This process is driven by a servo motor on the third linear motion module 63, and precise control and real-time monitoring of the applied force are achieved through motor torque conversion or an external pressure sensor.

[0018] During the pressurization process, the equipment simultaneously collects force and displacement data, recording the deflection changes of the fan blades under different loads to determine whether they meet the design requirements for bending strength. For example, when simulating lateral pressure that may be experienced during transportation or installation, this unit can apply progressively increasing radial thrust to observe whether the fan blades exhibit permanent deformation or structural cracking. After the test is completed, the longitudinal movement module automatically retracts, releasing the pressure to facilitate the continuation of subsequent test items.

[0019] In addition, the pressure plate 65 works in conjunction with the ranging sensor 71, which is also mounted on the third linear motion module 63. Before and after pressure is applied, the ranging sensor 71 is aligned with the same detection point to measure the displacement change of the windshield surface when it is pressed down, serving as an independent verification method to improve the accuracy of deformation measurement.

[0020] Furthermore, referring to Figures 1 to 11 The cross-flow fan blade testing equipment also includes a dynamic balancing test unit 70 connected to the frame 20. The dynamic balancing test unit 70 is located on the periphery of the cross-flow fan blade 10. The dynamic balancing test unit 70 is equipped with a distance measuring sensor 71, which points towards the cross-flow fan blade 10.

[0021] The dynamic balancing test unit 70 is connected to the frame 20. The setting of the dynamic balancing test unit 70 enables the equipment to perform multi-dimensional comprehensive testing of the wind turbine's structural strength, aerodynamic performance, and rotational stability without changing tooling or transferring workpieces.

[0022] The dynamic balancing test unit 70 includes a distance sensor 71, which is mounted on the second linear motion module 72. Its detection end points towards the outer peripheral surface of the cross-flow fan blade 10, preferably aligned with rigid features such as the connecting circle, hub edge, or reinforcing rib at the end of the fan blade to obtain a stable reflected signal. Specifically, the distance sensor 71 is a non-contact laser distance sensor, which emits a laser beam and receives reflected light to measure the distance change between the sensor and the fan blade surface in real time. The distance sensor 71 is mounted on the multi-axis linkage linear drive mechanism of the bending strength test unit 60. Driven by the second linear motion module 72, the distance sensor 71 can move precisely along the axial direction of the cross-flow fan blade 10, thereby enabling the sensor to scan point by point along the length of the fan blade, realizing the detection of runout at multiple axial positions, and adapting to the testing requirements of different fan blade models.

[0023] During dynamic balancing testing, the rotary drive test unit 40 is activated, driving the cross-flow fan blade 10 to rotate stably at a set speed, such as 500 rpm, 700 rpm, 1000 rpm, 1500 rpm, 2000 rpm, or 2500 rpm. During this process, the distance sensor 71 continuously collects radial displacement data of a point on the fan blade surface during each rotation. The control system analyzes this data according to the rotation cycle, extracting the fluctuation amplitude, i.e., the runout. If the runout exceeds a preset threshold, it indicates that the fan blade has significant mass eccentricity or structural deformation, which may cause vibration or noise during operation. By repeatedly measuring at multiple axial positions, local imbalance areas can also be identified, providing a basis for subsequent dynamic balancing correction.

[0024] In one embodiment, reference is made to Figures 1 to 11 The main body torque testing unit 30 includes a first clamping component 31, a second clamping component 32, and a torsion motor 342. The first clamping component 31 and the second clamping component 32 are respectively disposed on the periphery of the two ends of the cross-flow fan blade 10. The first clamping component 31 and the second clamping component 32 can clamp and fix the cross-flow fan blade 10 radially. The torsion motor 342 is connected to the first clamping component 31 and drives the first clamping component 31 to rotate circumferentially along the axis of rotation of the cross-flow fan blade 10.

[0025] The first clamping assembly 31 and the second clamping assembly 32 are respectively disposed on the periphery of the two ends of the cross-flow fan blade 10. The first clamping assembly 31 is disposed on the hollow rotating platform 341, which has a hollow area in the center for the shaft to pass through. The hollow rotating platform 341 is rotatably connected to the first support plate 331 via a bearing, and the first support plate 331 is fixed on the frame 20. Alignment holes 21 are also provided on the projection of the hollow rotating platform 341 and the pair of first cylinders 311 onto the platform of the frame 20 below, thereby ensuring sufficient rotation space for the hollow rotating platform 341 and the pair of first cylinders 311. The second clamping assembly 32 is mounted on the second support plate 332, which is fixed on an end-adjustable linear motion module 35 that can move along the axial direction of the cross-flow fan blade 10, so as to adjust the position of the second clamping assembly 32 according to the length of the cross-flow fan blade 10. The first clamping assembly 31 and the second clamping assembly 32 are arranged opposite each other along the axial direction of the cross-flow fan blade 10. Both the first clamping assembly 31 and the second clamping assembly 32 are equipped with pneumatic actuators, namely a pair of opposing first cylinders 311 and 321, and a first semi-circular clamping plate 312 and a second semi-circular clamping plate 322 connected to the push rods of each cylinder. When the cross-flow fan blade 10 under test is in place, the control system drives the two sets of cylinders to move synchronously, causing the opposing opposing arc-shaped clamping plates of the first clamping assembly 31 and the second clamping assembly 32 to close radially, gripping the shaft ends or hubs of the fan blade, forming a stable and reliable clamping constraint to prevent slippage or displacement during the test.

[0026] A torsion motor 342 is fixed to the first bearing plate 331 and drives the hollow rotating platform 341 to rotate along the axis of the cross-flow fan blade 10, causing the first clamping assembly 31 to twist. The first clamping assembly 31 is mounted and fixed on the hollow rotating platform 341, which contains a gear set. Driven by the drive gear on the output shaft of the torsion motor 342, the hollow rotating platform 341 twists, thereby causing the first clamping assembly 31 to rotate circumferentially around the axis of the cross-flow fan blade 10. At this time, the second clamping assembly 32 remains fixed, causing one end of the cross-flow fan blade 10 to have a relative angular displacement relative to the other end, forming a pure torsional load. During the torsion process, the torque output by the motor is monitored and recorded in real time by an industrial integrated machine. At the same time, the torsion angle is obtained by combining the encoder signal, and a torque-angle curve is plotted to determine whether the fan blade has undergone plastic deformation, weld cracking, or structural loosening.

[0027] In one embodiment, reference is made to Figures 1 to 11The rotary drive test unit 40 includes a drive motor 41, a torque sensor 42, and a centering roller assembly 44. The drive motor 41 is detachably connected to one end of the cross-flow fan blade 10, and the centering roller assembly 44 is detachably and rollingly connected to the end of the cross-flow fan blade 10 away from the drive motor 41. The torque sensor 42 is located between the drive motor 41 and the cross-flow fan blade 10.

[0028] The drive motor 41 is mounted at one end of the frame 20 and is connected to one side of the cross-flow fan blade 10 via a detachable connection. This connection can utilize a D-hole and D-shaft fit, a keyway connection, or a quick-change coupling 43, ensuring efficient power transmission while facilitating rapid replacement of different fan blade models. After the drive motor 41 starts, it can drive the cross-flow fan blade 10 to rotate a full circle at different preset speeds according to the preset program of the PLC controller 82, simulating its actual operating state in an air conditioning or ventilation system.

[0029] A torque sensor 42 is positioned between the drive motor 41 and the cross-flow fan blade 10 to detect the rotational torque at the motor output in real time. During fan blade rotation, the torque sensor 42 continuously collects torque signals, reflecting the amount of power required for the fan blade to overcome air resistance, bearing friction, and internal structural resistance. By recording and analyzing the torque values ​​at different speeds using an industrial control computer 81, it is possible to determine if the fan blade has issues such as overly tight assembly, blade deformation, or poor dynamic balance, thereby assessing its energy efficiency and operational stability.

[0030] At the other end of the cross-flow fan blade 10, that is, the end furthest from the drive motor 41, a centering roller assembly 44 is provided. This assembly is detachably rolled to the end shaft of the fan blade. Specifically, the centering roller assembly 44 consists of two freely rotating driven wheels 441, which are arranged opposite each other to form a V-shaped groove structure. The tail shaft of the fan blade under test is inserted into the V-shaped groove and rotates synchronously with the shaft during rotation. This structure achieves reliable axial positioning and radial support for the far end of the fan blade, while avoiding the additional constraints caused by rigid fixing. It truly reproduces the installation state of the cross-flow fan blade 10 in actual applications, where one end is driven and the other end is freely supported, thus improving the engineering representativeness of the test results.

[0031] In one embodiment, reference is made to Figures 1 to 11 The rotary drive test unit 40 further includes an end adjustment assembly, which includes an end adjustment linear motion module 35. The end adjustment linear motion module 35 is disposed on the frame 20 and extends along the axial direction of the cross-flow fan blade 10. The centering roller assembly 44 is slidably disposed on the end adjustment linear motion module 35.

[0032] The rotary drive test unit 40 also includes an end adjustment assembly, which includes an end adjustment linear motion module 35. The end adjustment linear motion module 35 is mounted on the frame 20 and extends along the axial direction of the cross-flow fan blade 10. The centering roller assembly 44 is mounted on the end adjustment linear motion module 35. The end adjustment linear motion module 35 includes a servo motor, a precision ball screw, a nut pair, and a sliding platform, and is fixed to the main frame. This module is installed along the axial direction of the cross-flow fan blade 10, and its stroke range covers the length specifications of common cross-flow fan blades 10, meeting the testing requirements of various product models. The second support plate 332 moves synchronously with the sliding platform of this linear motion module.

[0033] When changing to cross-flow fan blades 10 of different lengths, the operator selects the corresponding model on the industrial integrated machine. The control system automatically retrieves the pre-stored shaft length parameters and generates a displacement command, which is sent to the PLC controller 82. The PLC controller 82 drives the servo motor of the end adjustment linear motion module 35 to move the sliding platform precisely along the axial direction until the centering roller assembly 44 reaches the installation position matching the current fan blade length. Once the position is in place, the industrial integrated machine system indicates that it is in position. The operator connects the D-hole end of the fan blade to the rotary drive test unit 40, and inserts the tail shaft into the V-groove of the centering roller assembly 44 to complete the clamping. By integrating the centering roller assembly 44 onto the end adjustment linear motion module 35, automated and high-precision adjustment of the fan blade's distal support position is achieved, solving the technical problem that traditional fixed structures cannot be compatible with multiple product models. This allows the same equipment to stably and reliably serve the performance testing of various specifications of cross-flow fan blades 10.

[0034] In one embodiment, reference is made to Figures 1 to 11 The wind speed testing unit 50 also includes a wind duct 51, which is connected to the frame 20. One side port of the wind duct 51 is close to the periphery of the cross-flow fan blade 10, and the other side port of the wind duct 51 is equipped with the anemometer 52.

[0035] The air inlet of the duct 51 is located near the peripheral air outlet area of ​​the cross-flow fan 10, aligned with the middle or maximum air outlet section along the length of the fan blade, to maximize the capture of the lateral airflow generated during operation. The duct 51 extends along the airflow direction, and its cross-sectional shape can be designed as rectangular or arc-shaped to match the flat air outlet characteristics of the cross-flow fan 10 and reduce airflow eddies and pressure loss within the duct. The duct 51 is fixedly installed on the main frame, ensuring structural stability and minimizing the impact of external vibrations.

[0036] An anemometer 52 is installed at the air outlet of the air duct 51. Specifically, the anemometer 52 is a hot-wire anemometer 52, whose probe extends into the air duct 51 to detect the airflow velocity passing through the air duct 51. The hot-wire anemometer 52 operates based on the principle of thermal sensing; its probe is equipped with a heating element. When the airflow passes through, it carries away heat, and the temperature change is converted into an electrical signal, which is then used to calculate the wind speed value. Due to the presence of the air duct 51, the airflow is effectively confined within the closed channel, avoiding interference from ambient airflow, personnel movement, or equipment heat dissipation on the measurement results, significantly improving the stability and repeatability of the data. At the same time, the smooth inner wall of the air duct 51 reduces frictional resistance, making the measured wind speed closer to the actual output performance of the cross-flow fan blade 10.

[0037] In one embodiment, reference is made to Figures 1 to 11 The bending strength testing unit 60 includes a first linear motion module 61, a third linear motion module 63, and a pressure loading member 64. The first linear motion module 61 is connected to the frame 20 and extends along the rotation axis of the cross-flow fan blade 10. The third linear motion module 63 is located at the moving end of the first linear motion module 61 and extends along the radial direction of the cross-flow fan blade 10. The pressure loading member 64 is located at the moving end of the third linear motion module 63.

[0038] The bending strength testing unit 60 includes a first linear motion module 61, a third linear motion module 63, and a pressure loading component 64. This structure constitutes a spatially adjustable multi-axis linkage loading mechanism for applying a controllable radial thrust to the cross-flow fan blade 10 to test its structural rigidity and deformation resistance under localized pressure. The first linear motion module 61 is connected to the frame 20 and extends along the rotation axis of the cross-flow fan blade 10, serving as the basic motion layer of the entire bending strength testing unit 60. The first linear motion module 61 is driven by a servo motor and a ball screw to move the slide table linearly along the guide rail, providing a large stroke axial displacement capability to accommodate cross-flow fan blades 10 of different lengths. The third linear motion module 63 is located on the moving end of the first linear motion module 61, extending vertically along the radial direction of the cross-flow fan blade 10, and is used to drive the pressure loading component 64 to advance or retract towards the fan blade body to complete the loading action. Under the servo control of the PLC controller 82, the third linear motion module 63 can realize various test modes such as constant force loading, displacement control, or stepped pressure application. The pressure loading component 64 is located on the moving end of the third linear motion module 63, and its end is connected to the pressure plate 65.

[0039] During the test, when the bending strength test is initiated, the control system, according to the preset test program, first controls the first linear motion module 61 to coordinate its movement, precisely positioning the third linear motion module 63 and its end pressure loading component 64 directly above or to the side of the test position. Subsequently, the third linear motion module 63 starts, driving the pressure loading component 64 slowly downwards in the radial direction until the pressure plate 65 contacts the surface of the cross-flow fan blade 10 and begins to apply thrust. The servo system monitors the motor output torque in real time or provides feedback on the actual applied force value through an integrated pressure sensor, ensuring a smooth and controllable loading process. The equipment records the force-displacement relationship curve during the loading process, analyzes the elastic deformation of the fan blade and whether permanent deformation or structural failure occurs, thereby determining whether its bending performance is qualified.

[0040] In one embodiment, reference is made to Figures 1 to 11 The bending strength testing unit 60 further includes a pressure plate 65 and a pressure sensor. The pressure plate 65 is connected to the pressure loading member 64, and the pressure sensor is located between the pressure plate 65 and the pressure loading member 64. The pressure plate 65 has a concave arc surface 651 on the side near the cross-flow fan blade 10, which is recessed in the direction away from the cross-flow fan blade 10. The pressure plate 65 is fixed to the pressure loading member 64 by bolts or flange structure and moves along the radial direction of the cross-flow fan blade 10 with the third linear motion module 63. The concave arc surface 651 on the side of the pressure plate 65 near the cross-flow fan blade 10 is recessed in the direction away from the fan blade, and its curvature matches the contour of the outer peripheral surface of the cross-flow fan blade 10, ensuring uniform distribution of the contact area during pressure application and avoiding damage to the fan blade surface or measurement distortion caused by local point contact or edge stress concentration. The concave arc surface 651 can be designed as a replaceable structure according to the diameter specifications of common cross-flow fan blades 10, or it can be covered with elastic cushioning materials, such as polyurethane or silicone, to adapt to the testing requirements of different models of products and protect the surface of the fan blades from scratches.

[0041] A pressure sensor is located between the pressure plate 65 and the pressure loading component 64. It can be a miniature tensile / compressive sensor or a weighing force sensor, possessing high sensitivity and fast response characteristics. When the pressure plate 65 contacts the cross-flow fan blade 10 and begins to apply thrust, the pressure sensor converts the applied pressure into an electrical signal in real time and transmits it to the PLC controller 82. The PLC controller 82 can implement various loading modes according to a preset test program, such as constant force holding, stepped pressurization, or combined displacement and pressure control. If the actual applied force value approaches or exceeds the material safety threshold, the system can automatically stop loading and issue a warning to prevent permanent deformation or structural damage to the fan blade.

[0042] In one embodiment, reference is made to Figures 1 to 11The balance test unit 70 further includes a second linear motion module 72, which extends along the rotation axis of the cross-flow fan blade 10. The ranging sensor 71 is located at the moving end of the second linear motion module 72. The laser ranging sensor 71 is fixed to the moving end of the second linear motion module 72 by a mounting bracket. Its detection beam axis points to the outer peripheral surface of the cross-flow fan blade 10, preferably aligned with areas with obvious structural features and stable rotation, such as the fan hub, reinforcing ribs, or end connecting circles. Since the ranging sensor 71 moves by relying on the second linear motion module 72, it can be retracted to a safe position when not in measurement mode to avoid interference with other test actions. During dynamic balance testing, the sliding element drives the laser sensor to precisely position itself in front of the section to be measured, ensuring that the measurement distance is within the sensor's optimal operating range to obtain a stable and reliable ranging signal.

[0043] During the test, when the rotary drive test unit 40 drives the cross-flow fan blade 10 to rotate stably at a set speed, the laser range sensor 71 continuously emits a laser beam and receives reflected light from the surface of the fan blade, collecting real-time distance change data between the sensor and the measured point. The control system converts this distance signal into a displacement and analyzes it according to the rotation cycle, extracting its fluctuation peak, which is the radial runout at that position. If the runout exceeds a preset threshold, it indicates that there is mass eccentricity or structural deformation at that section, which may cause vibration or noise during the operation of the whole machine. By controlling the second linear motion module 72 to move the pressure loading component 64 to multiple axial positions such as the left, middle, and right sections of the fan blade in sequence, multi-point continuous scanning can be completed to comprehensively evaluate the dynamic balance state of the fan blade along the axial direction, generate a runout distribution map, and provide a basis for subsequent dynamic balance correction.

[0044] This invention also provides a cross-flow fan blade testing and control method, applied to the cross-flow fan blade testing equipment described in the above embodiments. Based on the cross-flow fan blade testing equipment, this method aims to achieve automated and integrated testing of more than 10 key performance parameters of the cross-flow fan blade through a systematic control process, solving problems such as dispersed procedures, excessive manual intervention, and untraceable data in traditional testing. This method fully utilizes the advantages of the equipment's integrated structure, integrating functions such as wind speed testing, connecting shaft torque testing, and body torque testing into a single testing process. Multiple evaluation items can be completed with only one clamping, significantly improving testing efficiency and result consistency.

[0045] Reference Figures 12 to 14 The cross-flow fan blade detection and control method of the present invention includes: S110. Connect the cross-flow fan blade 10 for testing to the rotary drive test unit 40 and fix the axial direction of the cross-flow fan blade 10. S120. Drive the cross-flow fan blade 10 to rotate according to the preset wind speed test speed through the rotation drive test unit 40, and obtain the wind speed when the cross-flow fan blade 10 rotates through the wind speed test unit 50, and record it as the speed and air volume test results. S130. Drive the cross-flow fan blade 10 to rotate through the rotary drive test unit 40, and clamp the cross-flow fan blade 10 to one end of the rotary drive test unit 40 according to the preset base torque test force through the body torque test unit 30. Monitor the feedback torque value of the rotary drive test unit 40 and record it as the link shaft torque test result. S140. The two ends of the cross-flow fan blade 10 are clamped by the main body torque testing unit 30, and one end of the cross-flow fan blade 10 is driven to perform a torsion test relative to the other end according to the preset main body torque. The feedback torque value of the torque testing unit is obtained and recorded as the link shaft torque test result. S150. Compare each test result with the preset pass / fail rules to generate pass / fail judgment information, and generate traceable records based on each test result.

[0046] First, the cross-flow fan blade 10 to be tested is horizontally placed in the testing position, and one end is detachably connected to the rotary drive testing unit 40. Specifically, the D-hole end or shaft of the fan blade is inserted into the power input end composed of the drive motor 41 and the coupling 43, ensuring that the two are coaxially connected to achieve torque transmission. Subsequently, the position of the centering roller assembly 44 is adjusted by the end adjustment component, so that its V-groove accurately supports the shaft at the other end of the fan blade, thereby completing the precise axial positioning and fixation of the cross-flow fan blade 10. This clamping process is stable and reliable, avoiding measurement errors caused by eccentricity or looseness.

[0047] Next, the rotation speed and airflow test phase is initiated. The control system invokes a preset program to control the drive motor 41 in the rotation drive test unit 40 to drive the cross-flow fan blades 10 to rotate stably at one or more preset wind speed test rotation speeds. During this process, the hot-wire anemometer 52 in the wind speed test unit 50 collects the airflow velocity generated by the fan blade rotation through the air duct 51, obtaining wind speed values ​​at different rotation speeds. The system automatically records the wind speed data corresponding to each rotation speed point and combines it with the rotation speed information to generate a "rotation speed-airflow" characteristic curve, which serves as an important basis for evaluating the fan blade ventilation performance. This data is marked as the rotation speed and airflow test result.

[0048] Subsequently, it enters the link shaft seat torque test stage. The control system continues to keep the fan blade rotating, and at the same time starts the first clamping component 31 in the body torsion test unit 30. The pneumatic actuator pushes it to clamp one end of the fan blade connecting the rotary drive test unit 40 radially. At this time, the rotary drive test unit 40 continues to apply the set torque, and the dynamic torque sensor 42 monitors the feedback torque value at the output end of the motor in real time to judge whether the torsional strength of the connection part between the fan blade and the drive shaft 45 meets the requirements. If there is no slippage or structural deformation under the specified torque, it is judged as qualified. The torque data collected during this process is recorded as the link shaft seat torque test result.

[0049] Immediately afterwards, the body torsion test is carried out. The control system instructs the first clamping component 31 and the second clamping component 32 to act simultaneously, clamping both ends of the cross-flow fan blade 10 respectively to form double-end constraints. Subsequently, the torsion motor 342 is started to drive the first clamping component 31 to perform circumferential torsion around the fan blade rotating shaft direction, so that one side of the fan blade generates a relative angular displacement relative to the other side. During this process, the system obtains the applied torsional torque through the torque feedback of the servo motor or an external force measuring device, and records its maximum value and the corresponding angular deformation amount to evaluate the torsional stiffness and connection reliability of the overall structure of the fan blade. The feedback torque value obtained from this test is recorded as the body torque test result.

[0050] After completing all the above tests, the control system aggregates all the collected data, including the rotational speed and air volume test results, the link shaft seat torque test result, and the body torque test result, and compares them with the qualified rules pre-stored in the database. The qualified rules are set according to the product design standards. For example, the air volume shall not be lower than a certain threshold, the link shaft seat torque shall be within a specified range, and there shall be no plastic deformation in the body torsion test, etc. If all items meet the requirements, a "qualified" judgment information is generated; if any item exceeds the standard, an unqualified judgment is triggered, and a red "unqualified" judgment information prompt pops up on the screen of the industrial integrated machine, and at the same time, an audible and visual alarm device is triggered to remind the operator to deal with it in time.

[0051] Finally, the system packages all the original data, judgment results, test time, operator number, fan blade model, etc. of this test to generate a structured traceable record, and automatically uploads it to the enterprise manufacturing execution system (EMS) or quality management system (QMS) through the communication interface to support later batch analysis, fault tracing and process optimization.

[0052] Furthermore, referring to Figure 13 , the cross-flow fan blade detection control method further includes: S160. The bending strength test unit 60 presses the cross-flow fan blade 10 radially according to the preset bending strength test force, and obtains the feedback torque value of the bending strength test unit 60, which is recorded as the bending test result of the fan blade. S170. The cross-flow fan blade 10 is driven to rotate at a preset dynamic balance test speed by the rotation drive test unit 40, and the distance of the outer peripheral side of the rotating cross-flow fan blade 10 is measured in real time by the distance measuring sensor 71 provided in the dynamic balance test unit 70. Based on the distance measurement result, the runout is calculated according to the preset rules and recorded as the dynamic balance test result.

[0053] After completing the speed and airflow tests, connecting shaft torque tests, and body torque tests, the control system automatically enters the bending strength test phase. At this time, the first linear motion module 61 and the third linear motion module 63 work together to precisely position the actuator above the target area according to the preset test position, such as the middle, left, or right section of the blade. Subsequently, the third linear motion module 63 drives the actuator to slowly lower the pressure plate 65 along the radial direction of the cross-flow blade 10, causing the concave arc surface 651 on the pressure plate 65 to contact the outer peripheral surface of the blade and apply a preset bending strength test force. This loading process is monitored in real-time by a pressure sensor located between the pressure plate 65 and the actuator, ensuring precise and controllable loading. Simultaneously, the system records the displacement changes during the loading process and generates a "force-displacement" curve based on the force data, used to analyze the blade's elastic deformation, stiffness coefficient, and whether permanent deformation has occurred. The pressure sensor feedback torque value obtained during this process is recorded by the system as the wind turbine blade bending resistance test result, serving as an important basis for evaluating the wind turbine blade's ability to resist external lateral pressure during transportation, installation, or long-term use.

[0054] In the bending strength test, the system switches to the dynamic balancing test. The rotation drive test unit 40 restarts, driving the cross-flow fan blade 10 to rotate stably at a preset dynamic balancing test speed, simulating its actual operating conditions. During this process, the distance sensor 71, located in the dynamic balancing test unit 70, continuously performs non-contact distance measurement on the outer periphery of the rotating cross-flow fan blade 10. This distance sensor 71 is mounted on the actuator sliding component and moves with the spatial positioning mechanism of the bending strength test unit 60, sequentially scanning multiple detection points along the fan blade axis, such as the connecting circles at both ends and the central hub. The control system collects the distance signal output by the laser sensor and processes the data based on the rotation cycle, extracting the difference between the maximum and minimum distance values ​​within each cycle to calculate the radial runout of the cross section. According to preset rules, if the runout does not exceed 0.5mm, the system determines whether the position meets the dynamic balancing requirements and summarizes the runout data of all detection points to generate a dynamic balancing characteristic map. The results were recorded as dynamic balancing test results, used to evaluate the stability of the fan blades at high speeds and to prevent excessive vibration or noise caused by uneven mass distribution.

[0055] In one embodiment, reference is made to Figure 14 The cross-flow fan blade detection and control methods also include: S180. Based on the length of the cross-flow fan blade 10 along the axial direction, the end of the fan blade 10 connected to the rotary drive test unit 40 away from the cross-flow fan blade 10 is controlled by the end adjustment component to move linearly along the axial direction of the cross-flow fan blade 10.

[0056] Before connecting the cross-flow fan blade 10 to the rotary drive test unit 40, the operator first selects the model of the fan blade to be tested on the human-machine interface of the industrial all-in-one machine, or automatically identifies the model information by scanning the barcode / QR code on the fan blade with a barcode scanner. The control system retrieves the pre-stored process parameter database based on the model, which includes the axial length dimension of the fan blade of that model. Based on this length data, the system automatically calculates the target installation position at the centering roller assembly 44 to match the support requirements of the far end of the fan blade. Subsequently, the control command is sent to the end adjustment linear motion module 35 in the end adjustment assembly, driving its moving end to move linearly along the axial direction of the cross-flow fan blade 10, causing the centering roller assembly 44 mounted on it to move synchronously to the calculated positioning point.

[0057] Once the centering roller assembly 44 reaches the target position, the system confirms its positioning via encoder feedback or limit sensor, and displays a message on the human-machine interface: "Support position adjusted, please install the fan blade." At this point, the operator connects one end of the cross-flow fan blade 10 to the rotary drive test unit 40, and smoothly inserts the other end shaft into the V-groove of the centering roller assembly 44. Because both ends are pre-aligned precisely, the fan blade can be smoothly positioned without forced assembly, avoiding additional stress or bearing wear caused by misalignment.

[0058] The cross-flow fan blade testing equipment and control method provided by this invention integrates multiple functions such as body torque, rotation drive, wind speed measurement, bending strength and dynamic balance testing into one unit, realizing fully automatic, one-stop testing of key performance parameters of the cross-flow fan blade 10, significantly improving testing efficiency, accuracy and data traceability. This technical solution not only solves the problems of low efficiency, large errors and scattered processes in traditional manual testing, but also possesses good versatility and scalability through modular design and intelligent control, adapting to various product models and supporting subsequent functional upgrades. As the quality requirements for core components continue to increase in various application fields of the cross-flow fan blade 10, this invention can be widely applied to on-line inspection, factory full inspection and quality traceability. In the future, it can be further integrated with machine vision, AI predictive analysis and industrial internet platforms to develop into an intelligent quality inspection terminal with self-learning capabilities, helping manufacturing enterprises achieve digital transformation and high-quality development, and has broad market prospects and industrialization value.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cross-flow fan blade testing device, characterized in that, include: frame; The main body torque testing unit is connected to the frame. The main body torque testing unit is detachably connected to both ends of the cross-flow fan blade. The main body torque testing unit drives one end of the cross-flow fan blade to twist relative to the other end along the axis of rotation of the cross-flow fan blade. A rotary drive test unit is connected to the frame. The rotary drive test unit is detachably coaxially connected to the cross-flow fan blade, and the rotary drive test unit drives the cross-flow fan blade to rotate. A wind speed testing unit is connected to the frame and is located around the cross-flow fan blade. The wind speed testing unit is used to obtain the wind speed when the cross-flow fan blade rotates.

2. The cross-flow fan blade testing device according to claim 1, characterized in that, It also includes a bending strength testing unit connected to the frame. The bending strength testing unit is located on the periphery of the cross-flow fan blade. The bending strength testing unit can apply thrust to the cross-flow fan blade in the radial direction of the cross-flow fan blade.

3. The cross-flow fan blade testing device according to claim 2, characterized in that, It also includes a dynamic balancing test unit connected to the frame. The dynamic balancing test unit is located around the cross-flow fan blade and is equipped with a distance measuring sensor that points towards the cross-flow fan blade.

4. The cross-flow fan blade testing device according to claim 1, characterized in that, The main body torque testing unit includes a first clamping component, a second clamping component, and a torsion motor. The first clamping component and the second clamping component are respectively disposed on the periphery of the two ends of the cross-flow fan blade. The first clamping component and the second clamping component can clamp and fix the cross-flow fan blade radially. The torsion motor is connected to the frame and drives the first clamping component to rotate circumferentially along the axis of rotation of the cross-flow fan blade.

5. The cross-flow fan blade testing device according to claim 1, characterized in that, The rotary drive test unit includes a drive motor, a torque sensor, and a centering roller assembly. The drive motor is detachably connected to one end of the cross-flow fan blade, and the centering roller assembly is detachably and rollingly connected to the end of the cross-flow fan blade away from the drive motor. The torque sensor is located between the drive motor and the cross-flow fan blade.

6. The cross-flow fan blade testing device according to claim 5, characterized in that, The rotary drive test unit also includes an end adjustment assembly, which includes an end adjustment linear motion module. The end adjustment linear motion module is mounted on the frame and extends along the axial direction of the cross-flow fan blade. The centering roller assembly is slidably mounted on the end adjustment linear motion module.

7. The cross-flow fan blade testing device according to claim 1, characterized in that, The wind speed testing unit also includes a wind duct connected to the frame. One side port of the wind duct is close to the periphery of the cross-flow fan blade, and the other side port of the wind duct is equipped with the anemometer.

8. The cross-flow fan blade testing device according to claim 3, characterized in that, The bending strength testing unit includes a first linear motion module, a third linear motion module, and a pressure loading component. The first linear motion module is connected to the frame and extends along the rotation axis of the cross-flow fan blade. The third linear motion module is located at the moving end of the first linear motion module and extends along the radial direction of the cross-flow fan blade. The pressure loading component is located at the moving end of the third linear motion module.

9. The cross-flow fan blade testing device according to claim 8, characterized in that, The bending strength testing unit also includes a pressure plate and a pressure sensor. The pressure plate is connected to the pressure loading member, and the pressure sensor is located between the pressure plate and the pressure loading member. The side of the pressure plate near the cross-flow fan blade is provided with a concave arc surface, which is recessed in the direction away from the cross-flow fan blade.

10. The cross-flow fan blade testing device according to claim 8, characterized in that, The balance test unit also includes a second linear motion module, which extends along the rotation axis of the cross-flow fan blade, and the distance sensor is located at the moving end of the second linear motion module.

11. A method for detecting and controlling cross-flow fan blades, characterized in that, The method, applied to the cross-flow fan blade testing device as described in any one of claims 1 to 10, comprises: The cross-flow fan blades used for testing are connected to the rotary drive test unit, and the axial direction of the cross-flow fan blades is fixed. The rotating drive test unit drives the cross-flow fan blade to rotate at a preset wind speed test speed, and the wind speed when the cross-flow fan blade rotates is obtained by the wind speed test unit and recorded as the speed and air volume test results. The cross-flow fan blade is driven to rotate by the rotary drive test unit, and the cross-flow fan blade is clamped at one end of the rotary drive test unit by the body torque test unit according to the preset base torque test force. The feedback torque value of the rotary drive test unit is monitored and recorded as the link shaft torque test result. The cross-flow fan blade is clamped at both ends by the main body torque testing unit, and one end of the cross-flow fan blade is driven to perform a torsion test relative to the other end according to the preset main body torque. The feedback torque value of the torque testing unit is obtained and recorded as the link shaft torque test result. Each test result is compared with a preset pass / fail rule to generate pass / fail judgment information, and a traceable record is generated by combining each test result.

12. The cross-flow fan blade detection and control method according to claim 11, characterized in that, The cross-flow fan blade testing equipment further includes a bending strength testing unit and a dynamic balance testing unit, and the method further includes: The bending strength test unit presses the cross-flow fan blade radially with a preset bending strength test force to obtain the feedback torque value of the bending strength test unit, which is recorded as the bending test result of the fan blade. The rotating drive test unit drives the cross-flow fan blade to rotate at a preset dynamic balance test speed. The distance sensor installed in the dynamic balance test unit measures the distance to the outer circumferential side of the rotating cross-flow fan blade in real time. Based on the distance measurement result, the runout is calculated according to a preset rule and recorded as the dynamic balance test result.

13. The cross-flow fan blade detection and control method according to claim 11, characterized in that, The cross-flow fan blade testing device further includes an end adjustment component, and the method further includes: Based on the length of the cross-flow fan blade along the axial direction, the end of the fan blade on the side connected to the rotary drive test unit away from the cross-flow fan blade is controlled by the end adjustment component to move linearly along the axial direction of the cross-flow fan blade.

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