Wind power equipment spindle strength checking method, device, equipment and medium

Abstract

The invention discloses a wind power equipment spindle strength checking method and device, equipment and a medium, is applied to a wind power load simulation assembly, and relates to the technical field of computers.The wind power equipment spindle strength checking method comprises the steps that target upsetting moment and target torque are applied to a preset spindle finite element model to obtain spindle stress response data; determining a target stress position in a preset spindle finite element model based on the spindle stress response data, and determining a distance between the target stress position and a hub center corresponding to the preset spindle finite element model to obtain a target distance, and determining a check load corresponding to the target stress position based on the preset response coefficient, the target upsetting moment, the target torque, the main shaft stress response data and the target distance, and verifying the main shaft strength of the preset main shaft finite element model based on the check load. Therefore, the limit stress of the target stress position of the main shaft can be obtained through analysis, and the accuracy of main shaft strength checking is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a method, device, equipment and medium for checking the strength of a main shaft of a wind power device. Background Art

[0002] During wind turbine operation, blade loads are transmitted to the gearbox via the main shaft. As wind turbine capacity increases, the overall size of the transmission system increases dramatically, regardless of whether it utilizes single spherical roller bearings or double tapered roller bearings. Therefore, strength verification of wind turbine main shafts becomes increasingly important.

[0003] In the existing technology, the main shaft strength is mainly checked based on the data of the main shaft hub center. However, as the wind turbine increases, the distance between the main shaft body and the hub center is also getting larger and larger. The limit load obtained based on the hub center is not necessarily the worst working condition that the main shaft can withstand. There is a possibility that the working condition will be missed in the main shaft check.

[0004] Therefore, in the context of wind power equipment main shaft strength verification, how to ensure accurate verification of the wind turbine main shaft strength is a problem to be solved. Summary of the Invention

[0005] In view of this, the present invention aims to provide a method, device, equipment, and medium for verifying the strength of the main shaft of a wind turbine. These methods can simulate the ultimate stress position of the main shaft and then verify the main shaft strength based on the relevant data of the ultimate stress position, thereby effectively improving the accuracy of the main shaft strength verification. The specific scheme is as follows:

[0006] In a first aspect, the present application discloses a method for checking the strength of a main shaft of a wind power equipment, which is applied to a wind power load simulation component, comprising:

[0007] Apply target overturning moment and target torque to the preset spindle finite element model to obtain spindle stress response data;

[0008] Determining a target stress position in a preset spindle finite element model based on the spindle stress response data, and determining a distance between the target stress position and a hub center corresponding to the preset spindle finite element model to obtain a target distance;

[0009] The check load corresponding to the target stress position is determined based on the preset response coefficient, the target overturning moment, the target torque, the spindle stress response data and the target distance, and the spindle strength of the preset spindle finite element model is verified based on the check load.

[0010] Optionally, applying a target overturning moment and a target torque to a preset spindle finite element model to obtain spindle stress response data includes:

[0011] applying a target overturning moment to the preset spindle finite element model to obtain spindle overturning moment stress data corresponding to each spindle position in the preset spindle finite element model;

[0012] applying a target torque to the preset spindle finite element model to obtain spindle torque stress data corresponding to each spindle position in the preset spindle finite element model;

[0013] selecting a preset number of target spindle overturning moment stress data from the spindle overturning moment stress data in descending order, and selecting target spindle torque stress data not less than the preset number from the spindle torque stress data in descending order;

[0014] using the target spindle overturning moment stress data and the target spindle torque stress data as spindle stress response data.

[0015] Optionally, the determining a target stress position in the preset spindle finite element model based on the spindle stress response data and determining a target distance between the target stress position and a hub center of the preset spindle finite element model to obtain a target distance, comprises:

[0016] determining a hub center of the preset spindle finite element model and determining a target stress position corresponding to the spindle stress response data in the preset spindle finite element model;

[0017] constructing a target coordinate system based on the hub center and recording a distance between the target stress position and the hub center in the target coordinate system to obtain a target distance.

[0018] Optionally, the determining a checking load corresponding to the target stress position based on a preset response coefficient, the target overturning moment, the target torque, the spindle stress response data and the target distance and verifying the spindle strength of the preset spindle finite element model based on the checking load, further comprises:

[0019] respectively applying an overturning moment unit load and a torque unit load to the preset spindle finite element model to determine a first stress response corresponding to the target stress position to the overturning moment unit load and a second stress response corresponding to the target stress position to the torque unit load;

[0020] determining a first ratio between the first stress response and the overturning moment unit load and a second ratio between the second stress response and the torque unit load;

[0021] calculating a sum value between an absolute value corresponding to the first ratio and an absolute value corresponding to the second ratio to obtain a target sum value;

[0022] using the ratio of the absolute value corresponding to the first ratio to the target sum value as a first preset response coefficient, and using the ratio of the absolute value corresponding to the second ratio to the target sum value as a second preset response coefficient;

[0023] The first preset response coefficient and the second preset response coefficient are used as preset response coefficients.

[0024] Optionally, determining the calibration load corresponding to the target stress position based on a preset response coefficient, the target overturning moment, the target torque, the main shaft stress response data, and the target distance includes:

[0025] Constructing a target calibration load extraction model according to the preset response coefficient, the target overturning moment, the target torque, the main shaft stress response data, and the target distance;

[0026] The maximum load corresponding to the target stress position is determined by the target check load extraction model, so that the obtained maximum load is used as the check load corresponding to the target stress position.

[0027] Optionally, the target check load extraction model is expressed as:

[0028] ;

[0029] Wherein, K1 is the first preset response coefficient, K2 is the second preset response coefficient, and M z is the moment corresponding to the z-axis of the target overturning moment in the target coordinate system, M y is the moment corresponding to the y-axis of the target overturning moment in the target coordinate system, M x is the target torque, F y is the force corresponding to the y-axis of the principal axis stress response data in the target coordinate system, F z is the force corresponding to the z-axis of the principal axis stress response data in the target coordinate system, H1 is the target distance, and H b is the preset distance threshold.

[0030] Optionally, verifying the spindle strength of the preset spindle finite element model based on the check load includes:

[0031] Loading the calibration load onto the preset spindle finite element model, and extracting the maximum stress of the model corresponding to the calibration load;

[0032] Determining whether the maximum stress of the model is greater than a preset model stress threshold;

[0033] If the maximum stress of the model is not greater than the preset model stress threshold, the verification is terminated. If the maximum stress of the model is greater than the preset model stress threshold, the preset spindle finite element model is structurally adjusted, and the process jumps to the step of applying the target overturning moment and target torque to the preset spindle finite element model to obtain the spindle stress response data, so as to re-perform the strength verification.

[0034] In a second aspect, the present application discloses a wind power equipment main shaft strength verification device, which is applied to a wind power load simulation component, comprising:

[0035] A model simulation module is used to apply target overturning moment and target torque to a preset spindle finite element model to obtain spindle stress response data;

[0036] a distance determination module, configured to determine a target stress position in a preset spindle finite element model based on the spindle stress response data, and determine a distance between the target stress position and a hub center corresponding to the preset spindle finite element model to obtain a target distance;

[0037] A strength verification module is used to determine the verification load corresponding to the target stress position based on a preset response coefficient, the target overturning moment, the target torque, the spindle stress response data and the target distance, and to verify the spindle strength of the preset spindle finite element model based on the verification load.

[0038] In a third aspect, the present application discloses an electronic device, comprising:

[0039] Memory, used to store computer programs;

[0040] The processor is used to execute the computer program to implement the aforementioned wind power equipment main shaft strength verification method.

[0041] In a fourth aspect, the present application discloses a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the aforementioned method for checking the strength of a main shaft of a wind power device.

[0042] In the present application, the target overturning moment and target torque can be applied to the preset spindle finite element model respectively to obtain the spindle stress response data; based on the spindle stress response data, the target stress position in the preset spindle finite element model is determined, and the distance between the target stress position and the center of the hub corresponding to the preset spindle finite element model is determined to obtain the target distance; based on the preset response coefficient, the target overturning moment, the target torque, the spindle stress response data and the target distance, the calibration load corresponding to the target stress position is determined, and the spindle strength of the preset spindle finite element model is verified based on the calibration load. In this way, the corresponding stress position can be determined by applying different forces to the spindle finite element model, thereby determining the most accurate ultimate stress position in the spindle finite element model, and then the spindle strength of the preset spindle finite element model can be verified by the relevant data of the determined stress position, which effectively improves the accuracy of the spindle strength calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0044] Figure 1 This is a flow chart of a method for checking the strength of a main shaft of a wind power equipment disclosed in this application;

[0045] Figure 2 A schematic diagram of a spindle finite element model disclosed in this application;

[0046] Figure 3 A schematic diagram of stress positions in a spindle finite element model disclosed in this application;

[0047] Figure 4 A schematic diagram of stress positions in another spindle finite element model disclosed in this application;

[0048] Figure 5 This is a schematic diagram of a processing flow of a wind power equipment main shaft strength verification method disclosed in this application;

[0049] Figure 6 A schematic diagram for comparing calibration results disclosed in this application;

[0050] Figure 7 This is another comparison diagram of the verification results disclosed in this application;

[0051] Figure 8 This is a schematic structural diagram of a wind power equipment main shaft strength verification device disclosed in this application;

[0052] Figure 9 This is a structural diagram of an electronic device disclosed in this application. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] In the existing technology, the main shaft strength is mainly checked based on the data of the main shaft hub center. However, as the wind turbine increases, the distance between the main shaft body and the hub center is also getting larger and larger. The limit load obtained based on the hub center is not necessarily the worst working condition that the main shaft can withstand. There is a possibility that the working condition will be missed in the main shaft check.

[0055] In order to overcome the above technical problems, the present application discloses a method, device, equipment and medium for checking the strength of the main shaft of wind power equipment, which can simulate the ultimate stress position of the main shaft, and then verify the main shaft strength through the relevant data of the ultimate stress position, thereby effectively improving the accuracy of the main shaft strength verification.

[0056] See also Figure 1 As shown, an embodiment of the present invention discloses a method for checking the strength of a main shaft of a wind power equipment, which is applied to a wind power load simulation component, comprising:

[0057] Step S11 : applying a target overturning moment and a target torque to a preset spindle finite element model to obtain spindle stress response data.

[0058] In this embodiment, it is necessary to apply corresponding forces to the preset main shaft finite element model to determine the main shaft stress response data corresponding to each position in the preset main shaft finite element model. It should be noted that the preset main shaft finite element model is a simulation model constructed through simulation application in the wind power load simulation component. Specifically, it is necessary to apply a target overturning moment to the preset main shaft finite element model to obtain the main shaft overturning moment stress data corresponding to each main shaft position in the preset main shaft finite element model; apply a target torque to the preset main shaft finite element model to obtain the main shaft torque stress data corresponding to each main shaft position in the preset main shaft finite element model; filter out a preset number of target main shaft overturning moment stress data from the main shaft overturning moment stress data based on the order from large to small, and filter out target main shaft torque stress data not less than the preset number from the main shaft torque stress data based on the order from large to small; use the target main shaft overturning moment stress data and the target main shaft torque stress data as the main shaft stress response data. It should be noted that, if Figure 2 As shown in the figure, it is a preset spindle finite element model. When performing simulation, it is necessary to apply the target overturning moment M to the preset spindle finite element model. yz And the target torque M x , in order to obtain the spindle overturning moment stress data of each spindle position in the preset spindle finite element model for the target overturning moment and the spindle torque stress data corresponding to each spindle position in the preset spindle finite element model. For example, apply an overturning moment of 10,000 kNm to the center of the hub to check the stress situation. Similarly, apply a torque of 10,000 kNm to the center of the hub to check the stress situation. Then, it is necessary to filter out a set number of target spindle overturning moment stress data and target spindle torque stress data from the spindle overturning moment stress data and spindle torque stress data corresponding to each position in order from large to small, and then extract the target spindle overturning moment stress data and target spindle torque stress data with larger stress, and use the target spindle overturning moment stress data and target spindle torque stress data as the spindle stress response data.

[0059] Step S12: determining a target stress position in a preset spindle finite element model based on the spindle stress response data, and determining a distance between the target stress position and a hub center corresponding to the preset spindle finite element model to obtain a target distance.

[0060] In this embodiment, it is necessary to determine the target stress position in the preset spindle finite element model based on the spindle stress response data, and it is necessary to determine the target distance of the target stress position relative to the hub center corresponding to the preset spindle finite element model. Specifically, it is necessary to determine the hub center of the preset spindle finite element model, and determine the target stress position corresponding to the spindle stress response data in the preset spindle finite element model, such as Figure 3As shown in , when the target overturning moment is applied to the hub center, the stress at point A at the horn in the preset spindle finite element model is the largest, and point A needs to be used as a target stress position corresponding to the spindle stress response data. Figure 4 As shown in the figure, when the target torque is applied to the center of the hub, the stress at point B at the tail end fillet position in the preset spindle finite element model is the largest. In this case, point B also needs to be used as a target stress position corresponding to the spindle stress response data.

[0061] Furthermore, it is necessary to construct a target coordinate system based on the hub center and record the distance of the target stress position from the hub center in the target coordinate system to obtain the target distance. Specifically, it is necessary to construct a coordinate system with the hub center as the center point, and then it is necessary to count the distance of each target stress position from the hub center in the constructed coordinate system to obtain the target distance.

[0062] Step S13: determining a check load corresponding to the target stress position based on a preset response coefficient, the target overturning moment, the target torque, the spindle stress response data, and the target distance, and verifying the spindle strength of the preset spindle finite element model based on the check load.

[0063] In this embodiment, it is necessary to construct a target check load extraction model to verify the spindle strength of the preset spindle finite element model based on the target check load extraction model. However, before constructing the target check load extraction model, it is necessary to determine the preset response coefficient required for constructing the model. Specifically, it is necessary to apply the overturning moment unit load and the torque unit load to the preset spindle finite element model respectively to determine the first stress response corresponding to the overturning moment unit load and the second stress response corresponding to the torque unit load of the target stress position. That is, it is necessary to apply the overturning moment unit load to the preset spindle finite element model respectively. , and torque unit load , then it is necessary to determine the target stress position for the overturning moment unit load The first stress response , and torque unit load The second stress response .

[0064] Then, it is necessary to determine a first ratio between the first stress response and the overturning moment unit load, and determine a second ratio between the second stress response and the torque unit load; calculate the sum of the absolute value corresponding to the first ratio and the absolute value corresponding to the second ratio to obtain a target sum; use the ratio of the absolute value corresponding to the first ratio to the target sum as a first preset response coefficient, and use the ratio of the absolute value corresponding to the second ratio to the target sum as a second preset response coefficient; use the first preset response coefficient and the second preset response coefficient as preset response coefficients. The expression for the first preset response coefficient is as follows:

[0065] ;

[0066] The expression of the first preset response coefficient is as follows:

[0067] ;

[0068] In another case, it is necessary to consider the situation where there is interference stress at the target stress position. In this case, the first stress response needs to be calculated. and interference stress to obtain the first difference, and calculate the first difference and the overturning moment unit load Then we need to calculate the second stress response and interference stress to obtain the second difference, and calculate the second difference and the torque unit load The ratio between the absolute value of the third ratio and the absolute value of the fourth ratio is calculated to obtain a fourth ratio. The sum of the absolute value of the third ratio and the absolute value of the fourth ratio is calculated to obtain a target sum. The ratio between the absolute value of the third ratio and the target sum is used as a first preset response coefficient, and the ratio between the absolute value of the fourth ratio and the target sum is used as a second preset response coefficient. is the interference stress corresponding to the target stress position, and the expression of the first preset response coefficient is as follows:

[0069] ;

[0070] The expression of the second preset response coefficient is as follows:

[0071] ;

[0072] In summary, if the preset response coefficient is obtained, it is necessary to construct a target calibration load extraction model based on the preset response coefficient, target overturning moment, target torque, spindle stress response data, and target distance. The expression of the target calibration load extraction model is as follows:

[0073] ;

[0074] Among them, K1 is the first preset response coefficient, K2 is the second preset response coefficient, M z is the moment corresponding to the z-axis of the target overturning moment in the target coordinate system, M y is the moment corresponding to the y-axis of the target overturning moment in the target coordinate system, M x is the target torque, F y is the force corresponding to the y-axis of the principal axis stress response data in the target coordinate system, F z is the force corresponding to the z-axis of the principal axis stress response data in the target coordinate system, H1 is the target distance, and H b is the preset distance threshold.

[0075] Taking the actual situation as an example, it is necessary to consider the stress of the main bearing under interference condition. Figure 3 For point A in the figure, the target distance is no greater than the preset distance threshold. The interference stress of the main bearing in the interference condition is 12.0 MPa, the stress in the overturning moment condition is 86.0 MPa, and the stress in the torque condition is 29.7 MPa. The overturning moment unit load is 1.0 MPa. Therefore, the overturning moment stress increment is 74.0 MPa, and the torque stress increment is 17.7 MPa. The response coefficients K1 = 74 / (74+17.7) = 0.8, and K2 = 17.7 / (74+17.7) = 0.2. Therefore, the expression of the target verification load extraction model for point A is as follows:

[0076] ;

[0077] against Figure 4 At point B in the figure, the target distance is greater than the preset distance threshold. The interference stress of the main bearing in the interference condition is 30.9 MPa, the stress in the overturning moment condition is 72.5 MPa, and the stress in the torque condition is 86.3 MPa. The overturning moment unit load is 1.0 MPa. Therefore, the overturning moment stress increment is 41.6 MPa, and the torque stress increment is 55.4 MPa. The response coefficients K1 = 41.6 / (41.6 + 55.4) = 0.43, and K2 = 55.4 / (41.6 + 55.4) = 0.57. Therefore, the expression of the target verification load extraction model for point B is as follows:

[0078] ;

[0079] Finally, the obtained verification loads corresponding to each position can be loaded into the preset spindle finite element model, and then the model maximum stress corresponding to the verification load at each position can be directly extracted in the simulation component, and then it can be determined whether the model maximum stress is greater than the preset model stress threshold. If the obtained model maximum stress is not greater than the preset model stress threshold, it indicates that the constructed preset spindle finite element model has met the set strength requirements, and the verification can be ended directly. In another case, if the model maximum stress is greater than the preset model stress threshold, it indicates that the current strength of the preset spindle finite element model does not meet the requirements, and the preset spindle finite element model needs to be structurally adjusted, and the step of applying the target overturning moment and target torque to the preset spindle finite element model to obtain the spindle stress response data is performed to re-calibrate the strength of the adjusted spindle finite element model. It should be noted that the structural adjustment of the preset spindle finite element model is to adjust the design of the spindle three-dimensional structure of the preset spindle finite element model.

[0080] In this embodiment, the target overturning moment and target torque can be applied to the preset spindle finite element model respectively to obtain the spindle stress response data; based on the spindle stress response data, the target stress position in the preset spindle finite element model is determined, and the distance between the target stress position and the center of the hub corresponding to the preset spindle finite element model is determined to obtain the target distance; based on the preset response coefficient, the target overturning moment, the target torque, the spindle stress response data and the target distance, the calibration load corresponding to the target stress position is determined, and the spindle strength of the preset spindle finite element model is verified based on the calibration load. In this way, by applying different forces to the spindle finite element model respectively, the corresponding stress position can be determined, thereby determining the most accurate ultimate stress position in the spindle finite element model, and then the spindle strength of the preset spindle finite element model can be verified by the relevant data of the determined stress position, effectively improving the accuracy of the spindle strength calibration.

[0081] See also Figure 5 As shown in FIG, it is a schematic diagram of the processing flow of checking the strength of the main shaft of a wind turbine using the method of the present application. First, it is necessary to apply the overturning moment M to the preset main shaft finite element model. yz and torque M x, then select several larger data from the spindle overturning moment stress data and the spindle torque stress data as the spindle stress response data, determine the target stress position corresponding to the spindle stress response data, and use these stress positions as stress hotspots. Then it is necessary to record the distance of each hot spot to the center of the hub. Then it is necessary to apply the overturning moment unit load and the torque unit load to the preset spindle finite element model respectively, so as to calculate the corresponding response coefficient through the corresponding response data, and construct the target verification load extraction model through the response coefficient, overturning moment, torque and the corresponding distance, and determine the maximum load corresponding to the target stress position through the target verification load extraction model, that is, the limit load, and then verify the strength of the preset spindle finite element model through the stress corresponding to the limit load.

[0082] Based on the constructed target check load extraction model, the following is determined: Figure 3 as well as Figure 4 The load conditions corresponding to points A and B are shown in Table 1. Table 1 is as follows:

[0083] Table 1

[0084]

[0085] It should be noted that the traditional method for spindle strength verification requires 7 conventional verification loads M x max、M x min、M y max、M y min、M z max、M z min、M yz The verification results based on the above 7 conventional loads are shown in Table 2:

[0086] Table 2

[0087]

[0088] In addition, the comparison diagram of the load conditions corresponding to point A and point B obtained by the method of the present application and the load conditions obtained by the traditional method is as follows: Figure 6 as well as Figure 7 As shown in the figure, the two are highly consistent, and the magnitude of the composite load corresponds to the magnitude of the spindle stress, demonstrating the adaptability of the composite load. Furthermore, the stress at point A (163 MPa) and the stress at point B (148 MPa) obtained using the method of this application are both greater than the results of conventional working condition verification. This indicates that the verification method of this application is more suitable for spindle strength verification, reducing the number of missed strength verification conditions.

[0089] See also Figure 8As shown, the embodiment of the present application discloses a wind power equipment main shaft strength checking device, which is applied to a wind power load simulation assembly and comprises:

[0090] a model simulation module 11, configured to apply a target overturning moment and a target torque to a preset main shaft finite element model respectively to obtain main shaft stress response data;

[0091] a distance determination module 12, configured to determine a target stress position in the preset main shaft finite element model based on the main shaft stress response data, and determine a distance between the target stress position and a corresponding hub center of the preset main shaft finite element model to obtain a target distance;

[0092] a strength checking module 13, configured to determine a checking load corresponding to the target stress position based on a preset response coefficient, the target overturning moment, the target torque, the main shaft stress response data and the target distance, and verify the main shaft strength of the preset main shaft finite element model based on the checking load.

[0093] In the embodiment, the target overturning moment and the target torque can be applied to the preset main shaft finite element model respectively to obtain the main shaft stress response data; the target stress position in the preset main shaft finite element model can be determined based on the main shaft stress response data, and the distance between the target stress position and the corresponding hub center of the preset main shaft finite element model can be determined to obtain the target distance; the checking load corresponding to the target stress position can be determined based on the preset response coefficient, the target overturning moment, the target torque, the main shaft stress response data and the target distance, and the main shaft strength of the preset main shaft finite element model can be verified based on the checking load. In this way, the corresponding stress positions can be determined by applying different forces to the main shaft finite element model, so that the most accurate limit stress position in the main shaft finite element model can be determined, and then the main shaft strength of the preset main shaft finite element model can be verified by using the related data of the determined stress position, thereby effectively improving the accuracy of the main shaft strength checking.

[0094] In some embodiments, the model simulation module 11 can specifically comprise:

[0095] a first data application unit, configured to apply the target overturning moment to the preset main shaft finite element model to obtain main shaft overturning moment stress data corresponding to each main shaft position in the preset main shaft finite element model;

[0096] a second data application unit, configured to apply the target torque to the preset main shaft finite element model to obtain main shaft torque stress data corresponding to each main shaft position in the preset main shaft finite element model;

[0097] a data screening unit, configured to screen out a preset number of target spindle overturning moment stress data from the spindle overturning moment stress data in descending order, and to screen out no less than the preset number of target spindle torque stress data from the spindle torque stress data in descending order;

[0098] The first data determining unit is configured to use the target spindle overturning moment stress data and the target spindle torque stress data as spindle stress response data.

[0099] In some embodiments, the distance determination module 12 may specifically include:

[0100] a stress position determining unit, configured to determine the hub center of the preset spindle finite element model and determine a target stress position corresponding to the spindle stress response data in the preset spindle finite element model;

[0101] The target distance determination unit is used to construct a target coordinate system based on the hub center and record the distance between the target stress position and the hub center in the target coordinate system to obtain the target distance.

[0102] In some embodiments, the wind power equipment main shaft strength verification device may further include:

[0103] a third data applying unit, configured to apply a unit overturning moment load and a unit torque load to the preset spindle finite element model, respectively, to determine a first stress response of the target stress position corresponding to the unit overturning moment load and a second stress response corresponding to the unit torque load;

[0104] a second data determining unit, configured to determine a first ratio between the first stress response and the overturning moment unit load, and to determine a second ratio between the second stress response and the torque unit load;

[0105] a data calculation unit, configured to calculate a sum of an absolute value corresponding to the first ratio and an absolute value corresponding to the second ratio to obtain a target sum;

[0106] a third data determining unit, configured to use a ratio of an absolute value corresponding to the first ratio to the target sum value as a first preset response coefficient, and use a ratio of an absolute value corresponding to the second ratio to the target sum value as a second preset response coefficient;

[0107] The fourth data determining unit is configured to use the first preset response coefficient and the second preset response coefficient as preset response coefficients.

[0108] In some embodiments, the strength verification module 13 may specifically include:

[0109] a model building unit, configured to build a target calibration load extraction model according to the preset response coefficient, the target overturning moment, the target torque, the main shaft stress response data, and the target distance;

[0110] a verification load determination unit, configured to determine a maximum load corresponding to the target stress position by using the target verification load extraction model, and use the obtained maximum load as the verification load corresponding to the target stress position;

[0111] The target check load extraction model is expressed as follows:

[0112] ;

[0113] Wherein, K1 is the first preset response coefficient, K2 is the second preset response coefficient, and M z is the moment corresponding to the z-axis of the target overturning moment in the target coordinate system, M y is the moment corresponding to the y-axis of the target overturning moment in the target coordinate system, M x is the target torque, F y is the force corresponding to the y-axis of the principal axis stress response data in the target coordinate system, F z is the force corresponding to the z-axis of the principal axis stress response data in the target coordinate system, H1 is the target distance, and H b is the preset distance threshold.

[0114] In some embodiments, the strength verification module 13 may specifically include:

[0115] A stress extraction unit, configured to apply the check load to the preset spindle finite element model and extract the maximum stress of the model corresponding to the check load;

[0116] A data comparison unit, used to determine whether the maximum stress of the model is greater than a preset model stress threshold;

[0117] The comparison response unit is used to end the verification if the maximum stress of the model is not greater than the preset model stress threshold; if the maximum stress of the model is greater than the preset model stress threshold, the preset spindle finite element model is structurally adjusted, and the process jumps to the step of applying the target overturning moment and target torque to the preset spindle finite element model respectively to obtain the spindle stress response data, so as to re-perform the strength verification.

[0118] Furthermore, the embodiment of the present application also discloses an electronic device, Figure 9 This is a structural diagram of an electronic device 20 according to an exemplary embodiment. The content in the diagram should not be considered as any limitation to the scope of application of the present application.

[0119] Figure 9 A structural schematic diagram of an electronic device 20 is provided in the embodiment. The electronic device 20 can specifically include at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25 and a communication bus 26. The memory 22 is configured to store a computer program, and the processor 21 is configured to load and execute the computer program to implement the related steps in the wind power equipment main shaft strength checking method disclosed in any of the foregoing embodiments. In addition, the electronic device 20 in the embodiment can be specifically an electronic computer.

[0120] In the embodiment, the power supply 23 is configured to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol followed by the communication interface 24 can be any communication protocol applicable to the technical solution of the present application, which is not specifically limited here; the input / output interface 25 is configured to obtain external input data or output data to the outside, and the specific interface type can be selected according to the specific application needs, which is not specifically limited here.

[0121] In addition, the memory 22 as a carrier for resource storage can be a read-only memory, a random access memory, a magnetic disk or an optical disk, etc., and the resources stored thereon can include an operating system 221, a computer program 222, etc., and the storage mode can be temporary storage or permanent storage.

[0122] The operating system 221 is configured to manage and control each hardware device on the electronic device 20 and the computer program 222, and can be Windows Server, Netware, Unix, Linux, etc. In addition to the computer program capable of completing the wind power equipment main shaft strength checking method executed by the electronic device 20 disclosed in any of the foregoing embodiments, the computer program 222 can further include a computer program capable of completing other specific work.

[0123] Further, the present application further discloses a computer readable storage medium for storing a computer program; wherein the computer program is executed by a processor to implement the wind power equipment main shaft strength checking method disclosed above. The specific steps of the method can refer to the corresponding content disclosed in the foregoing embodiments, which will not be repeated here.

[0124] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Reference can be made to the descriptions of the identical or similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and the relevant parts can be referred to the descriptions of the methods.

[0125] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0126] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0127] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0128] The above is a detailed introduction to the technical solution provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for checking the strength of a main shaft of a wind power equipment, characterized in that: Components used for wind power load simulation include: Apply target overturning moment and target torque to the preset spindle finite element model to obtain spindle stress response data; Determining a target stress position in a preset spindle finite element model based on the spindle stress response data, and determining a distance between the target stress position and a hub center corresponding to the preset spindle finite element model to obtain a target distance; The check load corresponding to the target stress position is determined based on the preset response coefficient, the target overturning moment, the target torque, the spindle stress response data and the target distance, and the spindle strength of the preset spindle finite element model is verified based on the check load.

2. The wind power equipment main shaft strength verification method according to claim 1, characterized in that: The target overturning moment and target torque are applied to the preset spindle finite element model respectively to obtain the spindle stress response data, including: Applying a target overturning moment to a preset spindle finite element model to obtain spindle overturning moment stress data corresponding to each spindle position in the preset spindle finite element model; Applying a target torque to the preset spindle finite element model to obtain spindle torque stress data corresponding to each spindle position in the preset spindle finite element model; Filtering a preset number of target spindle overturning moment stress data from the spindle overturning moment stress data in descending order, and filtering a number of target spindle torque stress data not less than the preset number from the spindle torque stress data in descending order; The target spindle overturning moment stress data and the target spindle torque stress data are used as spindle stress response data.

3. The wind power equipment main shaft strength verification method according to claim 1, characterized in that: Determining a target stress position in a preset spindle finite element model based on the spindle stress response data, and determining a distance between the target stress position and a hub center corresponding to the preset spindle finite element model to obtain a target distance, includes: Determining the hub center of the preset spindle finite element model, and determining the target stress position corresponding to the spindle stress response data in the preset spindle finite element model; A target coordinate system is constructed based on the hub center, and the distance of the target stress position from the hub center in the target coordinate system is recorded to obtain a target distance.

4. The wind power equipment main shaft strength verification method according to claim 3, characterized in that: Before determining the check load corresponding to the target stress position based on the preset response coefficient, the target overturning moment, the target torque, the spindle stress response data, and the target distance, and verifying the spindle strength of the preset spindle finite element model based on the check load, the method further includes: Applying an overturning moment unit load and a torque unit load to the preset spindle finite element model respectively to determine a first stress response of the target stress position corresponding to the overturning moment unit load and a second stress response corresponding to the torque unit load; determining a first ratio between the first stress response and the overturning moment unit load, and determining a second ratio between the second stress response and the torque unit load; calculating a sum of an absolute value corresponding to the first ratio and an absolute value corresponding to the second ratio to obtain a target sum; using the ratio of the absolute value corresponding to the first ratio to the target sum value as a first preset response coefficient, and using the ratio of the absolute value corresponding to the second ratio to the target sum value as a second preset response coefficient; The first preset response coefficient and the second preset response coefficient are used as preset response coefficients.

5. The wind power equipment main shaft strength verification method according to claim 4, characterized in that: The determining the calibration load corresponding to the target stress position based on the preset response coefficient, the target overturning moment, the target torque, the main shaft stress response data, and the target distance includes: Constructing a target calibration load extraction model according to the preset response coefficient, the target overturning moment, the target torque, the main shaft stress response data, and the target distance; The maximum load corresponding to the target stress position is determined by the target check load extraction model, so that the obtained maximum load is used as the check load corresponding to the target stress position.

6. The wind power equipment main shaft strength verification method according to claim 5, characterized in that: The expression of the target check load extraction model is: ； Wherein, K1 is the first preset response coefficient, K2 is the second preset response coefficient, and M z is the moment corresponding to the z-axis of the target overturning moment in the target coordinate system, M y is the moment corresponding to the y-axis of the target overturning moment in the target coordinate system, M x is the target torque, F y is the force corresponding to the y-axis of the principal axis stress response data in the target coordinate system, F z is the force corresponding to the z-axis of the principal axis stress response data in the target coordinate system, H1 is the target distance, and H b is the preset distance threshold.

7. The wind power equipment main shaft strength verification method according to any one of claims 1 to 6, characterized in that: The verifying the spindle strength of the preset spindle finite element model based on the check load includes: Loading the check load onto the preset spindle finite element model, and extracting the maximum stress of the model corresponding to the check load; Determining whether the maximum stress of the model is greater than a preset model stress threshold; If the maximum stress of the model is not greater than the preset model stress threshold, the verification is terminated. If the maximum stress of the model is greater than the preset model stress threshold, the preset spindle finite element model is structurally adjusted, and the process jumps to the step of applying the target overturning moment and target torque to the preset spindle finite element model to obtain the spindle stress response data, so as to re-perform the strength verification.

8. A wind power equipment main shaft strength verification device, characterized in that: Components used for wind power load simulation include: A model simulation module is used to apply target overturning moment and target torque to a preset spindle finite element model to obtain spindle stress response data; a distance determination module, configured to determine a target stress position in a preset spindle finite element model based on the spindle stress response data, and determine a distance between the target stress position and a hub center corresponding to the preset spindle finite element model to obtain a target distance; A strength verification module is used to determine the verification load corresponding to the target stress position based on a preset response coefficient, the target overturning moment, the target torque, the spindle stress response data and the target distance, and to verify the spindle strength of the preset spindle finite element model based on the verification load.

9. An electronic device, characterized in that: include: Memory, used to store computer programs; A processor is used to execute the computer program to implement the wind power equipment main shaft strength verification method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that Used to store a computer program, wherein when the computer program is executed by a processor, the method for checking the strength of the main shaft of a wind power equipment according to any one of claims 1 to 7 is implemented.

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