A method and system for calibrating the torque of a fan coupling

Abstract

The present invention discloses a method and a system for calibrating the torque of a fan coupling. The method includes: applying n multi-stage continuous stepped torque loads to the coupling until it slips, and synchronously obtaining the torque of the coupling; establishing a torque step diagram based on the torque values; establishing a fatigue damage model, assigning the torque step diagram to the fatigue damage model, and calculating the fatigue damage values of the friction discs in the total climbing period and the total stable period; using the torque at the slip during the nth climbing period in the torque step diagram as the first slip torque; correcting and compensating the first slip torque according to the fatigue damage values to calculate a second slip torque; and outputting the second slip torque as the calibrated slip torque. Through this method and system, the problem of calibration deviation caused by the traditional torque dynamic calibration method ignoring the load time-sequence damage is solved, the accuracy of the calibrated slip torque is improved, the overload protection delay is effectively avoided, and thus the service life of the gearbox bearing is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of intelligent detection technology, and more particularly to a method and system for calibrating the torque of a fan coupling. Background Art

[0002] As a core transmission component connecting the gearbox and the generator shaft system, the accurate calibration of the slip torque of the friction plate of the wind power coupling directly affects the reliability of the overload protection function of the transmission chain. Under the action of long-term alternating loads, the friction plates of the coupling are prone to fretting wear and material fatigue hardening, resulting in the actual slip threshold deviating from the factory calibration value. The traditional calibration method usually adopts the torque dynamic calibration method. After loading the coupling at a constant torque loading rate until it slips, the torque value at the moment of friction plate failure is directly recorded as the calibration reference. However, this technology has the following defects:

[0003] First of all, under the actual operating conditions of the wind power coupling, due to the influence of wind speed fluctuations and the response delay of pitch control, its torque does not show a monotonically linear increasing characteristic as in the loading test of the torque dynamic calibration method, but increases step by step in a gradient within the pitch control cycle of the wind turbine. Therefore, the torque dynamic calibration method cannot simulate the cumulative effect of the stepped dynamic load on the dynamic fatigue damage of the friction plate during actual operation, resulting in the calibration value not considering the weakening effect of the shear stress cycle during the climbing period on the yield strength of the material.

[0004] Secondly, this method also often ignores the creep relaxation effect of the stepped static load on the static fatigue damage of the friction plate during actual operation, resulting in the continuous attenuation of the pre-tightening force rate of the friction plate during the stable period. Therefore, using the traditional torque dynamic calibration method causes the detected slip torque to be too high due to the uncorrected coupling damage of dynamic and static fatigue during the stepped loading process; thus, the fan system triggers the protection action too late, and the bearings of the gearbox are frequently overloaded, greatly shortening their service life. Summary of the Invention

[0005] In order to at least overcome the above deficiencies in the prior art, the purpose of the present application is to provide a method and system for calibrating the torque of a fan coupling.

[0006] In a first aspect, an embodiment of the present application provides a method for calibrating the torque of a fan coupling, the method comprising the following steps:

[0007] Perform n multi-stage continuous stepped torque loadings on the coupling until it slips, and synchronously obtain the torque of the coupling, wherein each of the n - 1 stepped loading stages corresponds to a preset loading duration, and the preset loading duration includes a climbing period from the previous torque increase to the current torque, and a stable period of continuously loading while maintaining the current torque;

[0008] Establish a torque step diagram based on the torque values;

[0009] A fatigue damage model is established, the torque step diagram is assigned to the fatigue damage model, and the fatigue damage values of the friction plate during the total climbing period and the total stable period are calculated;

[0010] The slipping torque during the nth climbing period according to the torque step diagram is used as the first slipping torque;

[0011] The first slipping torque is corrected and compensated according to the fatigue damage value, and the second slipping torque is calculated;

[0012] The second slipping torque is output as the calibrated slipping torque.

[0013] When the embodiments of the present application are implemented, the fan coupling is mainly used to connect the motor and the gearbox transmission shaft, and realizes power transmission by transmitting torque. At the same time, it compensates for the axial, radial and angular deviations generated during the operation of the equipment, and avoids vibration or component wear caused by misalignment errors of the shafting. During the process of transmitting torque, the friction plate plays a crucial role. It dynamically adjusts the torque transmission efficiency through the frictional force between the contact surfaces, and can achieve buffer protection through the preset slipping torque during overload, avoiding mechanical damage to the gearbox or the motor caused by instantaneous impact; however, as the service life of the fan coupling increases, the surface roughness of the friction plate changes due to wear, resulting in a non-linear attenuation of the friction coefficient. At the same time, the alternating shear stress inside the fan coupling during actual operation will cause plastic deformation accumulation of the friction plate material, further exacerbating the detection deviation of the slipping torque. Therefore, it is necessary to retrieve the coupling from the fan box and re-calibrate the slipping torque; currently, the more commonly used method is to use the torque dynamic calibration method to calibrate the slipping torque of the coupling. However, the traditional torque dynamic calibration method cannot simulate the alternating action mode of "dynamic load during the climbing period - static load during the stable period" during actual operation, resulting in the calibration result being unable to reflect the fatigue damage accumulation effect of the friction plate under gradient load, making the detected slipping torque have a systematic deviation from the actual operation threshold. Therefore, the main purpose of the present application is to construct a composite correction model including dynamic fatigue damage and static fatigue damage, quantitatively analyze the cumulative damage of the friction plate during the stepped loading process, so as to achieve precise compensation for the slipping torque and solve the calibration error problem caused by the traditional method ignoring the load time series characteristics.

[0014] In the embodiments of the present application, the inventors found that when the coupling that has been in service for a long time is actually in operation, the climbing period of each step loading stage will introduce high-frequency stress amplitude changes, forming dynamic fatigue damage; and the continuous constant load in the stable period will induce creep deformation of the friction plate, forming static fatigue damage. The coupling effect of the two significantly reduces the anti-skid ability of the friction pair. Therefore, when designing the calibration method, firstly, the load sequence in actual operation is simulated by multi-level step loading. Each step contains two sub-stages of "linear climbing-constant load maintenance", in which the torque change rate in the climbing period is consistent with the response rate of the wind turbine pitch system, and the duration of the stable period matches the pitch control cycle, so as to ensure that the loading stage is consistent with the load characteristics of the actual working conditions. By synchronously collecting the torque time series data of each stage, the mechanical response characteristics of the friction plate during dynamic loading and static loading can be fully captured.

[0015] In the embodiment of the present application, the fatigue damage model is constructed based on the cumulative damage theory, and the total damage value is decomposed into two parts: dynamic damage during the climbing period and static damage during the stable period. Specifically, the dynamic fatigue damage model extracts the torque change gradient during the climbing period, calculates the shear stress amplitude of the friction plate in each climbing stage, regards each climbing period as an asymmetric stress cycle, calculates the fatigue life under single damage under each cycle, and then calculates the fatigue damage value (i.e., damage contribution) of the friction plate during the total climbing period based on the corresponding number of cycles; the static fatigue damage model is based on the average torque value of the stable period, calculates the fatigue damage value of the friction plate under constant shear stress in each stable period, and then calculates the fatigue damage value of the total stable stage based on the fatigue damage value of each stable period. By superimposing the two types of damage values, a comprehensive evaluation of the fatigue state of the friction plate is formed, and based on this, the first slip torque detected at the moment of slip is corrected. This correction process fully considers the degradation effect of the load mode on the mechanical properties of the friction plate during the step loading process, so that the second slip torque finally output can truly reflect the actual slip value of the coupling in the service environment, thereby effectively avoiding the overload protection delay problem caused by the high calibration value, improving the stability and reliability of the fan transmission chain operation, and effectively extending the service life of the gearbox bearing.

[0016] Furthermore, the fatigue damage model includes a dynamic fatigue damage model for calculating the dynamic fatigue damage value of the total climbing period and a static fatigue damage model for calculating the static fatigue damage value of the total stable period.

[0017] Furthermore, the specific steps for calculating the dynamic fatigue damage value during the total climbing period include:

[0018] Eliminate the torque data of the stable period of the moment ladder diagram according to the preset duration of the stable period;

[0019] A dynamic fatigue damage model is established, and the torque ladder diagram is assigned to the dynamic fatigue damage model;

[0020] The torque at the start of each climbing period is taken as the first torque, and the torque at the end of each climbing period is taken as the second torque, and the shear stress of the friction plate in each climbing period is calculated according to the first torque and the second torque;

[0021] The fatigue life of the friction plate in the corresponding climbing period is calculated based on the shear stress in each climbing period;

[0022] The dynamic fatigue damage value of the friction plate during the total climbing period is calculated based on the fatigue life of each climbing period.

[0023] Furthermore, the formula for calculating the shear stress of the friction plate during each climbing period is:

[0024] ;

[0025] In the formula, is the shear stress, is the torque at the end of each climbing period, is the torque at the start of each climbing period, is the friction coefficient, is the radius of the friction plate.

[0026] Furthermore, the formula for calculating the fatigue life of the friction plate in each climbing period is:

[0027] ;

[0028] In the formula, N is the fatigue life of each climbing period, C is the fatigue strength coefficient of the friction plate, and m is the fatigue strength index of the friction plate.

[0029] Furthermore, the formula for calculating the dynamic fatigue damage value of the friction plate during the total climbing period is:

[0030] ;

[0031] In the formula, is the dynamic fatigue damage value during the total climbing period.

[0032] Furthermore, the specific steps for calculating the static fatigue damage value of the total stable period include:

[0033] Eliminate the torque data of the climbing period of the moment ladder diagram according to the preset duration of the climbing period;

[0034] Establish a static fatigue damage model and assign the torque ladder diagram to the static fatigue damage model;

[0035] Calculate the average torque of each stable period as the third torque, and calculate the shear stress of the friction plate in the corresponding stable period according to the third torque;

[0036] The static fatigue damage value of the friction plate during the corresponding stable period is calculated according to the shear stress of each stable period;

[0037] The static fatigue damage value of the friction plate during the total stable period is calculated according to the static fatigue damage value of each stable period.

[0038] Furthermore, fatigue compensation is performed on the first slip torque according to the fatigue damage value, and the formula for calculating the second slip torque is:

[0039] ;

[0040] In the formula, is the second slip torque, is the first slip torque, is the fatigue compensation coefficient, is the static fatigue damage value during the total stable period.

[0041] On the second aspect, the application example also provides a system for calibrating the torque of the fan coupling. The system includes a processor and a memory that communicate with each other. The processor is used to read and execute a computer program from the memory to implement the above method.

[0042] Furthermore, the system also includes a central processing unit module, which is configured to implement the mutual communication, process control, and dynamic resource allocation between the processor and the memory.

[0043] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0044] A method and a system for calibrating the torque of a fan coupling according to the present invention can accurately simulate the stepped load characteristics during actual operation, construct a composite correction model including dynamic and static fatigue damage, quantify the cumulative damage of the friction plate during the climbing period and the stable period, and accordingly perform correction and compensation on the slip torque. This method solves the problem of calibration deviation caused by ignoring the load time-sequence damage in the traditional torque dynamic calibration method, improves the accuracy of the calibrated slip torque, effectively avoids the delay of overload protection, and further extends the service life of the gearbox bearing. Description of the Drawings

[0045] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0046] Figure 1 is a schematic diagram of the steps of the method for calibrating the torque of the fan coupling according to the embodiment of this application;

[0047] Figure 2Schematic diagram of the method steps for calculating the dynamic fatigue damage value during the total climbing period in the embodiments of the present application;

[0048] Figure 3 Schematic diagram of the method steps for calculating the static fatigue damage value during the total stable period in the embodiments of the present application. Detailed implementation manners

[0049] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and shall not be construed as a limitation to the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0052] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified or limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0054] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of the disclosure of the present invention.

[0055] In subsequent descriptions, suffixes such as "module", "component", "assembly" or "unit" are only used to facilitate the description of the present invention and have no specific meaning in themselves. Therefore, they can be used interchangeably.

[0056] The present invention will be further described in detail below with reference to the specific embodiments in conjunction with the accompanying drawings.

[0057] Please refer to Figure 1 , which is a schematic flow chart of a method for calibrating the torque of a fan coupling provided by an embodiment of the present invention. Further, the method for calibrating the torque of a fan coupling specifically may include the contents described in the following steps.

[0058] Apply n multi-stage continuous stepped torque loads to the coupling until it slips, and synchronously obtain the torque of the coupling. Among them, each n - 1 stepped loading stage corresponds to a preset loading duration, and the preset loading duration includes a climbing period from the previous torque increase to the current torque, and a stable period of continuously loading while maintaining the current torque;

[0059] Establish a torque step diagram based on the torque values;

[0060] Establish a fatigue damage model, assign the torque step diagram to the fatigue damage model, and calculate the fatigue damage values of the friction disc during the total climbing period and the total stable period;

[0061] Use the torque at the time of slipping during the nth climbing period according to the torque step diagram as the first slipping torque;

[0062] Correct and compensate the first slipping torque according to the fatigue damage value, and calculate the second slipping torque;

[0063] Output the second slip torque as the calibrated slip torque.

[0064] The object of the present invention is to overcome the technical defects existing in the traditional torque dynamic calibration method, which are specifically manifested as follows: it is impossible to simulate the stepped dynamic load characteristics affected by pitch control during the actual operation of a wind turbine, resulting in the failure to consider the dynamic fatigue damage of the friction material caused by the cyclic shear stress during the climbing period in the calibration process; ignoring the static creep relaxation effect caused by the continuous torque loading during the stable period, which causes the pre-tightening force of the friction plate to continuously decay, resulting in a falsely high calibration value, leading to a relatively high deviation degree in the setting of the protection threshold, and further affecting the service life of key components such as the gearbox.

[0065] Based on this, the inventors of the present application provide a method for calibrating the torque of a wind turbine coupling. This method simulates the dynamic load characteristics of the actual working conditions through multi-stage stepped torque loading, establishes a coupled damage correction system including a dynamic fatigue damage model and a static fatigue damage model, and compensates for the fatigue damage of the initial slip torque based on the quantitative analysis of the cyclic shear stress cycle times during the climbing period and the creep relaxation rate during the stable period, and finally outputs the accurately corrected calibrated slip torque.

[0066] For the above-mentioned steps, this method first adopts an n-level continuous stepped torque loading strategy. Each loading stage includes a dual load action mode of a climbing period and a stable period. Among them, the climbing period simulates the process of the torque gradient rising caused by the sudden change of wind speed, and the stable period corresponds to the torque platform maintenance stage during the pitch system adjustment period. In this embodiment, the entire loading stage includes n climbing periods and n - 1 stable periods. The torque growth rate during the climbing period is 20 N·m / s, the preset duration of the climbing period is 2 s, and the preset duration of the stable period is 5 s. It should be noted that if the wind turbine is in an alpine or high-humidity environment, it is recommended to extend the duration of the climbing period to 3 - 4 s and the stable period to 6 - 8 s to capture the acceleration effect of temperature or humidity on the decay of the pre-tightening force, while the torque growth rate needs to be differentially set according to the model and specification of the coupling. By increasing the torque in a stepped manner, the operation of the coupling in the actual environment is simulated, and the torque-time data of each stage is synchronously collected to form a characteristic load sequence.

[0067] Then, a torque step diagram is constructed based on the real-time collected characteristic load sequence. By digitally processing the time-torque diagram, key parameters such as the initial torque and final torque of each climbing period, the average torque of the stable period, the duration of the climbing period, and the duration of the stable period are extracted, and a data index corresponding to the loading step number is established. The fatigue damage values of the climbing period and the stable period are calculated through these parameters.

[0068] After that, taking the slip torque first monitored in the nth climbing period as the initial reference value, combined with the calculated fatigue damage value, a damage compensation algorithm is used to inversely correct the initial value, and finally the corrected second slip torque is obtained.

[0069] Finally, the second slip torque after fatigue damage compensation is output as the final calibrated value.

[0070] In a possible implementation, the fatigue damage model includes a dynamic fatigue damage model for calculating a dynamic fatigue damage value during a total climbing period and a static fatigue damage model for calculating a static fatigue damage value during a total stable period.

[0071] In one possible implementation, please refer to Figure 2 , the specific steps for calculating the dynamic fatigue damage value of the total climbing period include:

[0072] Eliminating the torque data of the stable period of the moment ladder diagram according to the preset duration of the stable period;

[0073] Establishing a dynamic fatigue damage model, and assigning the torque ladder diagram to the dynamic fatigue damage model;

[0074] The torque at the start of each climbing period is taken as the first torque, and the torque at the end of each climbing period is taken as the second torque, and the shear stress of the friction plate in each climbing period is calculated according to the first torque and the second torque;

[0075] The fatigue life of the friction plate in the corresponding climbing period is calculated according to the shear stress in each climbing period;

[0076] The dynamic fatigue damage value of the friction plate during the total climbing period is calculated based on the fatigue life of each climbing period.

[0077] When this embodiment is implemented, a filter is used to perform noise reduction processing on the torque ladder diagram to filter out low-frequency mechanical vibration noise and high-frequency electromagnetic interference. The time window segmentation algorithm is used to extract the torque data of the stable period, and the torque of each step reaches the target value ±2% error band as the starting point of the stable period, and the next climbing period trigger signal is used as the end point. The stable period platform data is eliminated, and then the torque diagram containing the torque data of each climbing period is assigned to the dynamic fatigue damage model, and the fatigue damage behavior under cyclic load is described in combination with the Manson-Coffin equation. Each climbing period is regarded as an asymmetric linear load cycle, and the fatigue damage of the climbing period under each cycle is calculated. Finally, the dynamic fatigue damage value accumulated in the total climbing period is summed up.

[0078] In a possible implementation, the formula for calculating the shear stress of the friction plate during each climbing period is:

[0079] ;

[0080] In the formula, is the shear stress, is the torque at the end of each climbing period, is the torque at the start of each climbing period, is the friction coefficient, is the radius of the friction plate.

[0081] In a possible implementation, the formula for calculating the fatigue life of the friction plate in each climbing period is:

[0082] ;

[0083] In the formula, N is the fatigue life of each climbing period, C is the fatigue strength coefficient of the friction plate, and m is the fatigue strength index of the friction plate.

[0084] In this embodiment, the specific value of the key coefficient is obtained by performing a conventional material fatigue test on the friction plate of the same specification and model, wherein the fatigue strength coefficient C of the friction plate is , fatigue strength index m=0.15.

[0085] In a possible implementation, the formula for calculating the dynamic fatigue damage value of the friction plate during the total climbing period is:

[0086] ;

[0087] In the formula, is the dynamic fatigue damage value during the total climbing period.

[0088] In one possible implementation, please refer to Figure 3 , the specific steps for calculating the static fatigue damage value of the total stable period include:

[0089] Eliminating the torque data of the climbing period of the torque ladder diagram according to the preset duration of the climbing period;

[0090] Establishing a static fatigue damage model, and assigning the torque ladder diagram to the static fatigue damage model;

[0091] Calculating the average torque of each stable period as the third torque, and calculating the shear stress of the friction plate in the corresponding stable period according to the third torque;

[0092] According to the shear stress in each stable period, the static fatigue damage value of the friction plate in the corresponding stable period is calculated;

[0093] The static fatigue damage value of the friction plate in the total stable period is calculated based on the static fatigue damage value of each stable period.

[0094] When this embodiment is implemented, the climbing period torque sequence is accurately extracted through the time window segmentation algorithm, and the torque jump edge of each step is used as the trigger signal. The climbing period is defined as the time interval from the trigger moment to the torque reaching the target value ±2% error band. The torque data of each climbing period is eliminated, and then the torque diagram containing the torque data of each stable period is assigned to the static fatigue damage model. By calculating the average torque in each stable period as the third torque, the equivalent static stress of each stable period is calculated using the steady-state shear stress formula in combination with the friction plate geometric parameters and material properties. Specifically, the shear stress calculation formula for each stable period is as follows:

[0095] ;

[0096] In the formula, is the shear stress for each stable period, is the average torque for each stable period.

[0097] Subsequently, a static fatigue damage model was established based on the creep law, and the static fatigue damage value of a single stable period was calculated by substituting the stable period duration and shear stress into the following formula:

[0098] ;

[0099] In the formula, is the static fatigue damage value of each stable period, is the creep coefficient of the friction plate, is the stress index of the friction plate, is the preset duration corresponding to each stabilization period, wherein A and n are key parameters obtained by conducting conventional creep tests on friction plates of the same specification and model.

[0100] The final total static fatigue damage value is the sum of the damage in each stable period. The specific formula is:

[0101] ;

[0102] In the formula, is the static fatigue damage value of the total stable period.

[0103] In a possible implementation, fatigue compensation is performed on the first slip torque according to the fatigue damage value, and a formula for calculating the second slip torque is:

[0104] ;

[0105] In the formula, is the second slip torque, is the first slip torque, is the fatigue compensation coefficient, is the static fatigue damage value of the total stable period.

[0106] Based on the same inventive concept, the present application also provides a system for calibrating the torque of a fan coupling, including a processor and a memory that communicate with each other. The processor is configured to read a computer program from the memory and execute the above method for calibrating the torque of the fan coupling.

[0107] In a possible implementation, the system further includes a central processing unit module, which is configured to implement the mutual communication, process control, and dynamic resource allocation between the processor and the memory.

[0108] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be noted that, in order to simplify the description of the present invention and thus facilitate the understanding of one or more embodiments of the invention, in the previous description of the embodiments of the present invention, sometimes multiple features are merged into one embodiment, drawing, or description thereof.

Claims

1. A method for calibrating the torque of a fan coupling, characterized in that, Including: Performing n multi-stage continuous stepped torque loadings on the coupling until slippage occurs, and synchronously acquiring the torque of the coupling. Among them, each n - 1 stepped loading stages correspond to a preset loading duration, and the preset loading duration includes a climbing period from the previous torque increase to the current torque, and a stable period of continuously loading while maintaining the current torque; Establishing a torque step diagram based on the torque values; Establishing a fatigue damage model, assigning the torque step diagram to the fatigue damage model, and calculating the fatigue damage values of the friction plates in the total climbing period and the total stable period; Taking the torque at slippage in the nth climbing period according to the torque step diagram as the first slippage torque; Performing correction compensation on the first slippage torque according to the fatigue damage values, and calculating to obtain a second slippage torque; Outputting the second slippage torque as the calibrated slippage torque; The fatigue damage model includes a dynamic fatigue damage model for calculating the dynamic fatigue damage value of the total climbing period and a static fatigue damage model for calculating the static fatigue damage value of the total stable period; The specific steps for calculating the dynamic fatigue damage value of the total climbing period include: Eliminating the torque data in the stable period of the torque step diagram according to the preset duration of the stable period; Establishing a dynamic fatigue damage model, and assigning the torque step diagram to the dynamic fatigue damage model; Taking the torque at the start moment of each climbing period as the first torque, and the torque at the end moment as the second torque, and calculating the shear stress of the friction plate in each climbing period according to the first torque and the second torque; Calculating the fatigue life of the friction plate in the corresponding climbing period according to the shear stress of each climbing period; Calculating the dynamic fatigue damage value of the friction plate in the total climbing period according to the fatigue life of each climbing period; The specific steps for calculating the static fatigue damage value of the total stable period include: Eliminating the torque data in the climbing period of the torque step diagram according to the preset duration of the climbing period; Establishing a static fatigue damage model, and assigning the torque step diagram to the static fatigue damage model; Calculating the average torque of each stable period as the third torque, and calculating the shear stress of the friction plate in the corresponding stable period according to the third torque; Calculating the static fatigue damage value of the friction plate in the corresponding stable period according to the shear stress of each stable period; Calculating the static fatigue damage value of the friction plate in the total stable period according to the static fatigue damage values of each stable period.

2. A method for calibrating the torque of a fan coupling according to claim 1, characterized in that, The formula for calculating the shear stress of the friction plate in each climbing period is: ； In the formula, is the shear stress, is the torque at the end of each climbing period, is the torque at the start of each climbing period, is the friction coefficient, is the radius of the friction plate.

3. A method for calibrating the torque of a fan coupling according to claim 2, characterized in that, The formula for calculating the fatigue life of the friction plate in each climbing period is: ； In the formula, N is the fatigue life of each climbing period, C is the fatigue strength coefficient of the friction plate, and m is the fatigue strength index of the friction plate.

4. A method for calibrating the torque of a fan coupling according to claim 3, characterized in that, The formula for calculating the dynamic fatigue damage value of the friction plate in the total climbing period is: ； In the formula, is the dynamic fatigue damage value during the total climbing period.

5. A method for calibrating the torque of a fan coupling according to claim 4, characterized in that, The formula for performing fatigue compensation on the first slippage torque according to the fatigue damage values and calculating to obtain the second slippage torque is: ； In the formula, is the second slip torque, is the first slip torque, is the fatigue compensation coefficient, is the static fatigue damage value in the total stable period.

6. A system for calibrating the torque of a fan coupling, characterized in that, Including a processor and a memory that communicate with each other, and the processor is used to read and execute a computer program from the memory to implement the method according to any one of claims 1 to 5.

7. A system for calibrating the torque of a fan coupling according to claim 6, characterized in that, The system further includes a central processor module, and the central processor module is configured to be used for realizing the mutual communication, process control, and dynamic resource allocation between the processor and the memory.

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