Fan belt tensioner

Abstract

The application belongs to the technical field of fan transmission, and particularly relates to a fan belt tensioning device, which comprises a fixedly arranged base plate, a linear guide assembly arranged on the base plate, a movable mounting seat arranged on the linear guide assembly, a fan driving assembly arranged on the movable mounting seat, and a linear driving assembly arranged on the base plate. The movable mounting seat is automatically driven by the linear driving assembly to translate along the guide assembly, so that the fan driving assembly is away from the fan impeller, thereby dynamically tensioning the relaxed belt body under the non-stop state and maintaining constant tension. The core advantage is that the mechanical adjustment of the belt body tensioning is realized, the production interruption, efficiency loss and human error caused by traditional manual stop adjustment are completely avoided, the equipment operation continuity and transmission stability are significantly improved, the operation and maintenance cost and fault risk are reduced, the service life of the belt is prolonged, and the efficient, safe and low-noise operation of the fan system is ensured.

Description

Technical Field

[0001] This application belongs to the field of wind turbine transmission technology, specifically relating to a wind turbine belt tensioning device. Background Technology

[0002] In systems such as central air conditioning, industrial ventilation, and air purification, fans, as core power components, typically drive impellers via belt drives. However, during long-term operation, the drive belt inevitably elongates and ages due to factors such as material plastic deformation, continuous friction and wear, ambient temperature fluctuations, and load changes, leading to a gradual decrease in belt tension. Insufficient tension will cause a series of operational problems: First, slippage occurs between the belt and pulleys, reducing transmission efficiency and causing a decrease in actual airflow output, affecting system performance; second, increased friction during slippage generates abnormal noise and vibration, worsening the working environment; more seriously, continuous slippage can lead to localized overheating of the belt, accelerating aging and even causing it to burn out, resulting in equipment shutdown and threatening the safe and stable operation of the system.

[0003] Currently, the industry's common solution relies on regular manual inspections and maintenance. Within a preset maintenance cycle, tension is restored by manually adjusting the tension pulley or directly replacing the belt. This method has significant drawbacks: firstly, manual adjustment requires machine downtime, affecting continuous equipment operation and reducing production efficiency; secondly, frequent manual intervention increases maintenance costs and manpower burden, and the accuracy of adjustment depends on the operator's experience, making consistency difficult to guarantee. Utility Model Content

[0004] The technical problem to be solved by this application is to provide a wind turbine belt tensioning device to solve the problems of existing technology which requires shutdown operation, affecting continuous equipment operation and has low efficiency.

[0005] This application provides a wind turbine belt tensioning device, comprising: A fixed substrate; A linear guide assembly disposed on the substrate; A movable mounting base is provided on the linear guide assembly; The fan drive assembly is mounted on the movable mounting base and is connected to the fan impeller via a belt drive. A linear drive assembly disposed on the substrate is used to drive a movable mounting base to move along the guiding direction of the linear guide assembly, so that the fan drive assembly moves a predetermined distance away from the fan impeller.

[0006] Optionally, the linear drive assembly includes an actuator motor disposed on the base plate, a lead screw drivenly connected to the output shaft of the actuator motor, and at least two support components for supporting the lead screw. The axial direction of the lead screw is consistent with the guiding direction of the linear guide assembly, and the nut of the lead screw is connected to the movable mounting base.

[0007] Optionally, the actuator motor is a servo motor or a stepper motor.

[0008] Optionally, the actuator motor is connected to the lead screw via a coupling.

[0009] Optionally, the support component includes a bearing housing and a support bearing disposed on the bearing housing.

[0010] Optionally, the lead screw is located at the bottom of the movable mounting base.

[0011] Optionally, the linear guide assembly includes at least two parallel linear guide rail pairs, the movable mounting base is connected to the sliders of at least two of the linear guide rail pairs, and the fan drive assembly is mounted on the movable mounting base.

[0012] Optionally, the fan drive assembly includes a drive motor and a pulley connected to the output shaft of the drive motor, wherein the drive motor is a servo motor or a stepper motor.

[0013] Optionally, the wind turbine belt tensioning device further includes a position control system, which includes a laser displacement sensor, a controller, and a human-machine interface operation module. The laser displacement sensor is non-contactly installed on the movable mounting base and is used to measure the distance L between the belt and the movable mounting base in real time.

[0014] The beneficial effect of this application is that by automatically driving the movable mounting base along the guide assembly using a linear drive component, the fan drive component is moved away from the fan impeller, thereby dynamically tightening the slack belt body and maintaining a constant tension without stopping the machine. Its core advantage lies in achieving mechanized adjustment of the belt body tension, completely avoiding the production interruptions, efficiency losses, and human error problems caused by traditional manual adjustments. This significantly improves the continuity of equipment operation and transmission stability, while reducing maintenance costs and failure risks, extending belt lifespan, and ensuring efficient, safe, and low-noise operation of the fan system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the fan belt tensioning device provided in the embodiments of this application; Figure 2 The control logic diagram of the position control system provided in the embodiments of this application is shown.

[0016] In the diagram: 1.1, housing; 1.2, fan impeller; 1.3, belt body; 1.4, bracket; 10, base plate; 21, linear guide pair; 22, slider; 30, movable mounting base; 41, drive motor; 42, pulley; 51, actuator motor; 52, lead screw; 53, support component; 54, coupling; 61, laser displacement sensor; 62, human-machine interface operation module. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0018] like Figure 1 As shown, the present application provides a fan belt tensioning device, comprising: a fixed base plate 10, a linear guide assembly disposed on the base plate 10, a movable mounting base 30 disposed on the linear guide assembly, a fan drive assembly disposed on the movable mounting base 30, and a linear drive assembly disposed on the base plate 10; the fan drive assembly is connected to the fan impeller 1.2 via a belt; the linear drive assembly is used to drive the movable mounting base 30 to move along the guiding direction of the linear guide assembly, so that the fan drive assembly moves a predetermined distance away from the fan impeller 1.2.

[0019] Compared with existing technologies, the wind turbine belt tensioning device provided in this application automatically drives the movable mounting base 30 to translate along the guide component via a linear drive component, moving the wind turbine drive component away from the wind turbine impeller 1.2. This dynamically tightens the slack belt body 1.3 without shutting down the system, maintaining a constant tension. Its core advantage lies in achieving mechanized adjustment of the belt body 1.3 tension, completely avoiding the production interruption, efficiency loss, and human error problems caused by traditional manual adjustment. It significantly improves the continuity of equipment operation and transmission stability, while reducing maintenance costs and failure risks, extending belt service life, and ensuring efficient, safe, and low-noise operation of the wind turbine system.

[0020] In one possible implementation, the linear drive assembly includes an actuator motor 51 disposed on the base plate 10, a lead screw 52 drivenly connected to the output shaft of the actuator motor 51, and at least two support members 53 for supporting the lead screw 52. The axial direction of the lead screw 52 is consistent with the guiding direction of the linear guide assembly, and the nut of the lead screw 52 is connected to the movable mounting base 30.

[0021] Specifically, a precision ball screw 52 is mounted parallel to the belt tension direction (i.e., away from the fan impeller 1.2) on the base plate 10. Both ends of the screw 52 are fixed to the base plate 10 by at least two bearing support components 53 (such as seated bearings or flange bearing seats) to ensure axial stability and radial slippage during screw 52 rotation. An actuator motor 51 is coaxially connected to one end of the screw 52 via a coupling 54, achieving precise rotational power input. The nut on the screw 52 is rigidly connected to the movable mounting base 30. When the actuator motor 51 drives the screw 52 to rotate, the nut converts the rotational motion into linear motion, thereby driving the movable mounting base 30 and the fan drive assembly mounted on it to slide smoothly along the linear guide assembly, achieving stepless and precise adjustment of the belt tension. This embodiment has advantages such as high precision, high rigidity, self-locking, and programmable control, facilitating the integration of sensors (such as tension sensors or displacement sensors) to achieve closed-loop feedback control, thereby automatically adjusting the tension displacement according to the actual belt tension, truly achieving "intelligent adaptive tensioning."

[0022] In one possible implementation, the actuator 51 is either a servo motor or a stepper motor. Both servo motors and stepper motors can achieve precise angle and displacement control, and when combined with the lead screw 52, ​​the belt tension can be accurate to the micrometer or millimeter level, ensuring that the tension is stable within the optimal working range and avoiding excessive tightness or looseness.

[0023] In one possible implementation, the actuator 51 and the lead screw 52 are connected by a coupling 54. The coupling 54 has a compact structure and is easy to install and remove, eliminating the need for complex alignment adjustments to the motor or lead screw 52 and reducing assembly difficulty. If the motor or lead screw 52 needs to be replaced later, only the coupling 54 needs to be disassembled, resulting in high maintenance efficiency.

[0024] In one possible implementation, the support member 53 includes a bearing housing and a support bearing disposed on the bearing housing.

[0025] Specifically, rigid bearing seats are fixedly installed on the base plate 10 at both ends along the axial direction of the lead screw 52 (or intermediate support points are added according to the length of the lead screw 52). Each bearing seat is equipped with a high-precision rolling bearing (such as a combination of deep groove ball bearings, angular contact bearings, or thrust bearings). The journal portion of the lead screw 52 is precisely installed in the inner hole of the support bearing, thereby achieving radial positioning and axial support of the lead screw 52. The bearing seats are firmly fixed to the base plate 10 with bolts, ensuring that the lead screw 52 remains stable, free from wobble, and operates with low friction when rotating at high speed or bearing axial load. At the same time, it is easy to disassemble and maintain, effectively ensuring the rigidity, accuracy, and long-term reliability of the lead screw 52 transmission system.

[0026] In one possible implementation, the lead screw 52 is located at the bottom of the movable mounting base 30.

[0027] Specifically, the lead screw 52 is arranged horizontally (i.e., in the tension adjustment direction) above the base plate 10 and directly below the movable mounting base 30. The nut of the lead screw 52 is rigidly fixed to the center or symmetrical position of the bottom surface of the movable mounting base 30 through a connecting block or transition bracket 1.4, ensuring that the push and pull force is transmitted along the center line of gravity. The movable mounting base 30 slides smoothly in a straight line as the lead screw 52 rotates through the linkage structure between its bottom and the nut. At the same time, its upper part is constrained by a linear guide component to prevent deflection or overturning. This layout makes full use of the space below the equipment, making the overall structure longitudinally compact and the center of gravity lower, improving operational stability, and facilitating the protection, lubrication and maintenance of the lead screw 52. It also avoids interference between the transmission components and the moving components above, such as the fan impeller 1.2 and belt, thus balancing safety and space utilization.

[0028] In one possible implementation, the linear guide assembly includes at least two parallel linear guide pairs 21, a movable mounting base 30 is connected to sliders 22 of the at least two linear guide pairs 21, and a fan drive assembly is mounted on the movable mounting base 30.

[0029] Specifically, two high-precision linear guides are symmetrically or equidistantly installed on the base plate 10 along the belt tensioning direction (i.e., the straight line away from the fan impeller 1.2). Each guide rail is equipped with one or more sliders 22. The movable mounting base 30 is rigidly connected to these sliders 22 by bolts or positioning structures, thus being constrained to slide smoothly on the straight trajectory defined by the guide rails. The fan drive assembly is securely mounted on the top or side of the movable mounting base 30. This structure, through the dual or multi-guide rail layout, significantly improves the bending moment resistance and eccentric load resistance of the movable system, effectively preventing the movable mounting base 30 from tilting, jamming, or wearing due to uneven force or vibration during the tensioning process. This ensures high-precision, low-friction, and long-life operation of the tensioning action, while enhancing overall rigidity and dynamic stability. It is especially suitable for long-term reliable operation under high-power fan or high-load conditions.

[0030] In one possible implementation, the wind turbine drive assembly includes a drive motor 41 and a pulley 42 connected to the output shaft of the drive motor 41. The drive motor 41 is a servo motor or a stepper motor.

[0031] Specifically, the drive motor 41 is rigidly mounted on the movable mounting base 30, and its output shaft is coaxially assembled with the transmission pulley 42 through a key connection, expansion sleeve or direct flange. The pulley 42 forms a transmission pair with the driven pulley on the impeller 1.2 shaft of the fan through a V-belt, synchronous belt or the like.

[0032] It should be noted that the base plate 10 is fixed to the hardened ground by multiple bolts, and a bracket 1.4 is installed on the base plate 10. The fan housing 1.1 is fixedly installed on the bracket 1.4, and the fan impeller 1.2 is set inside the housing 1.1.

[0033] In one possible implementation, the wind turbine belt tensioning device also includes a position control system, which includes a laser displacement sensor 61, a controller, and a human-machine interface module 62. The laser displacement sensor 61 is non-contactly mounted on the movable mounting base 30 and is used to measure the distance L between the belt and the movable mounting base 30 in real time. The controller is integrated into the actuator motor 51. The human-machine interface module 62 can be a tablet computer and is wirelessly connected to the controller.

[0034] Specifically, the laser displacement sensor 61 measures the distance L between the belt and the mounting seat in real time and transmits it to the controller; the actuator motor 51 uses the encoder to provide feedback on its own position and drives the lead screw 52 to precisely adjust the position of the moving seat; the controller integrates the encoder data from the laser displacement sensor 61 and the actuator motor 51 and controls the motor's actions according to a preset algorithm; the human-machine interface is used for parameter setting (such as tension threshold, safety upper limit), status display, historical data recording, and remote alarm control, realizing visualized intelligent management of the entire system.

[0035] like Figure 2 As shown, the system workflow adopts closed-loop control logic: After startup, the laser sensor continuously monitors the distance L. The controller first determines whether L is lower than the preset threshold. If it is lower than the threshold, it is determined that the belt is loose. The actuator motor 51 drives the lead screw 52 to move the movable mounting seat 30 slightly away from the impeller (e.g., in 1mm increments) to tension the belt. Then, the L value is updated and the judgment is repeated until the tension reaches the standard. If L exceeds the safety upper limit, an emergency stop alarm is immediately triggered to prevent the belt from being too tight and causing equipment damage, ensuring safe operation. Between the threshold and the upper limit, the current state is maintained to achieve dynamic adaptive adjustment.

[0036] During operation, the threshold and safety parameters are first initialized and set through the human-machine interface. Then, the laser displacement sensor 61 is installed and calibrated to ensure that its beam is perpendicular and stably irradiates the belt surface to avoid measurement interference. Next, the system is integrated and tested manually to verify the consistency between the moving seat displacement and the sensor reading, and to verify that the transmission components (motor, lead screw 52, ​​guide rail) run smoothly without jamming. Finally, it enters the fully automatic operation mode. The controller adjusts the tension autonomously based on real-time data. Maintenance personnel can remotely monitor the operating status, view historical trends, and receive abnormal alarms through a tablet computer, which greatly improves the intelligence level of the equipment and maintenance efficiency.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0038] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A fan belt tensioning device, characterized in that, include: A fixed substrate (10); A linear guide assembly disposed on the substrate (10); Movable mounting base (30) disposed on the linear guide assembly; The fan drive assembly is mounted on the movable mounting base (30), and the fan drive assembly is connected to the fan impeller (1.2) via a belt. A linear drive assembly disposed on the substrate (10) is used to drive a movable mounting base (30) to move along the guiding direction of the linear guide assembly, so that the fan drive assembly moves a predetermined distance away from the fan impeller (1.2).

2. The fan belt tensioning device according to claim 1, characterized in that, The linear drive assembly includes an actuator motor (51) disposed on the base plate (10), a lead screw (52) drivenly connected to the output shaft of the actuator motor (51), and at least two support components (53) for supporting the lead screw (52). The axial direction of the lead screw (52) is consistent with the guiding direction of the linear guide assembly, and the nut of the lead screw (52) is connected to the movable mounting base (30).

3. The fan belt tensioning device according to claim 2, characterized in that, The actuator (51) is a servo motor or a stepper motor; And / or, the actuator (51) is connected to the lead screw (52) via a coupling (54).

4. The fan belt tensioning device according to claim 2, characterized in that, The support component (53) includes a bearing housing and a support bearing disposed on the bearing housing.

5. The fan belt tensioning device according to any one of claims 2-4, characterized in that, The lead screw (52) is located at the bottom of the movable mounting base (30).

6. The fan belt tensioning device according to claim 1, characterized in that, The linear guide assembly includes at least two parallel linear guide pairs (21), the movable mounting base (30) is connected to the sliders (22) of the at least two linear guide pairs (21), and the fan drive assembly is mounted on the movable mounting base (30).

7. The fan belt tensioning device according to claim 1, characterized in that, The fan drive assembly includes a drive motor (41) and a pulley (42) connected to the output shaft of the drive motor (41). The drive motor (41) is a servo motor or a stepper motor.

8. The fan belt tensioning device according to any one of claims 1-4, 6, and 7, characterized in that, It also includes a position control system, which includes a laser displacement sensor (61), a controller and a human-machine interface operation module (62). The laser displacement sensor (61) is non-contactly installed on the movable mounting base (30) and is used to measure the distance L between the belt and the movable mounting base (30) in real time.

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