A variable pitch reducer load calculation method, system, terminal and medium

Abstract

The present invention relates to the field of post-processing of variable pitch reducers, and specifically discloses a method, system, terminal and medium for calculating the load of variable pitch reducers. The torque of each pinion gear of the variable pitch reducer is calculated under each extreme working condition and each fatigue working condition, with or without considering the combined efficiency of the variable pitch reducer and the variable pitch motor and the inertia torque of the variable pitch motor, and then the maximum torque of each pinion gear of the variable pitch reducer and the continuous distribution of the torque load are obtained for verification, and the corresponding load condition is output when the verification is passed. The present invention realizes load calculation under various working conditions, avoids insufficient design margin or over-design, improves design accuracy and efficiency, and thus ensures the operating efficiency and cost-effectiveness of the wind turbine.

Description

Technical Field

[0001] The present invention relates to the field of post-processing of variable pitch reducers, and in particular to a method, system, terminal and medium for calculating the load of variable pitch reducers. Background Art

[0002] With the rapid development of wind power generation technology, the power and size of wind turbines are increasing, and the performance requirements for key components such as variable pitch reducers are also increasing. As an important transmission component in wind turbines, the design rationality and load bearing capacity of variable pitch reducers are directly related to the overall performance and operation safety of wind turbines.

[0003] Traditional variable pitch reducer load calculation includes variable pitch reducer load post-processing method, which performs statistical analysis on load data collected by sensors and data collection systems, calculates the load distribution, and understands the load characteristics of variable pitch reducers under different working conditions. However, this traditional method is difficult to fully and accurately reflect the load characteristics under actual working conditions, especially under extreme working conditions and long-term fatigue conditions, which may lead to insufficient design margin or over-design, so that the variable pitch reducer cannot meet the requirements in terms of fatigue and static strength, thus affecting the operating efficiency and cost-effectiveness of wind turbines. Summary of the invention

[0004] To solve the above problems, the present invention provides a variable pitch reducer load calculation method, system, terminal and medium, which can realize load calculation under various working conditions, avoid insufficient design margin or over-design, improve design accuracy and efficiency, and thus ensure the operating efficiency and cost-effectiveness of the wind turbine.

[0005] In a first aspect, the technical solution of the present invention provides a method for calculating the load of a variable pitch reducer, comprising the following steps:

[0006] Build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue conditions of the wind turbine;

[0007] Taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, which are recorded as the first limit pitch reducer pinion gear torque and the first fatigue pitch reducer pinion gear torque.

[0008] The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the first limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the first fatigue pitch reducer, which are recorded as the first maximum torque and the first torque load continuous distribution;

[0009] Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the first maximum torque and the first torque load continuous distribution;

[0010] If the check is passed, the pinion torques of each level of the first limit variable pitch reducer and the pinion torques of each level of the first fatigue variable pitch reducer are output;

[0011] If the check fails, without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, and recorded as the second limit pitch reducer pinion gear torque and the second fatigue pitch reducer pinion gear torque;

[0012] The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the second limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the second fatigue pitch reducer, which is recorded as the second maximum torque and the second torque load continuous distribution;

[0013] Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the second maximum torque and the second torque load continuous distribution;

[0014] If the check is passed, the pinion torques of each level of the second limit pitch reducer and the pinion torques of each level of the second fatigue pitch reducer are output;

[0015] If the verification fails, change the operating conditions or model parameters and recalculate the wind turbine's limit operating conditions and fatigue operating conditions.

[0016] In an optional implementation, taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each extreme working condition and each fatigue working condition, specifically including:

[0017] Step 1: Calculate the friction torque of the pitch bearing ;

[0018] Step 2: According to the friction torque of the pitch bearing Calculate the pitch gear ring torque ;

[0019] Step 3: According to the pitch gear ring torque Calculate the pitch drive motor torque ;

[0020] Step 4: Under the condition that the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor are taken into account, the torque of the pinion gears of each level of the pitch reducer is calculated by formula (1); under the condition that the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor are not taken into account, the torque of the pinion gears of each level of the pitch reducer is calculated by formula (2);

[0021] (1)

[0022] (2)

[0023] in, ;

[0024] In the formula, For the variable pitch reducer Stage pinion torque, For the variable pitch reducer Transmission ratio; For the variable pitch reducer Level transmission efficiency.

[0025] In an optional embodiment, the friction torque of the pitch bearing is calculated Specifically include:

[0026] Obtain the tipping moment of the blade root pitch bearing , Axial force of pitch bearing , radial force of pitch bearing ;

[0027] The friction torque of the pitch bearing is calculated by the following formula ,

[0028]

[0029] In the formula, is the friction coefficient of the pitch ball bearing, is the pitch bearing swing diameter; , are two coefficients.

[0030] In an optional embodiment, according to the friction torque of the pitch bearing Calculate the pitch gear ring torque Specifically include:

[0031] Get the pitch bearing torque ;

[0032] The pitch gear ring torque is calculated by the following formula ;

[0033] (1) If the pitch speed is greater than 0, the pitch ring gear torque ;

[0034] (2) If the pitch rate is less than 0, the pitch ring gear torque ;

[0035] (3) The pitch rate is equal to 0, and , then the pitch ring gear torque ;

[0036] (4) The pitch rate is equal to 0, and , then the pitch ring gear torque ;

[0037] (5) In other cases, the pitch ring gear torque is 0.

[0038] In an optional embodiment, according to the pitch gear ring torque Calculate the pitch drive motor torque Specifically include:

[0039] Get the efficiency of the pitch drive motor , total transmission ratio from blade to pitch drive motor , Pitch drive motor moment of inertia , Pitch acceleration ;

[0040] The pitch drive motor torque is calculated by the following formula ,

[0041] .

[0042] In an optional implementation, the maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the limit torque of each level of the pinion gear of the pitch reducer, specifically including:

[0043] For each level of variable pitch reducer, the torques of the pinions of the variable pitch reducers are sorted from large to small, and the maximum torque is selected, that is, the maximum torque of the pinion of the variable pitch reducer at the current gear level.

[0044] In an optional implementation, obtaining a continuous distribution of torque load according to the torque of each level of pinion of the fatigue pitch reducer specifically includes:

[0045] For each level of variable pitch reducer, the torque of each fatigue variable pitch reducer pinion is processed by the probability density processing algorithm to obtain the continuous distribution of the torque load of the variable pitch reducer at the current gear level.

[0046] In a second aspect, the technical solution of the present invention provides a variable pitch reducer load calculation system, comprising:

[0047] Working condition simulation module: Build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue conditions of the wind turbine;

[0048] Pinion torque calculation module: considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the pinion torques of each level of the pitch reducer are calculated under each extreme working condition and each fatigue working condition, which are recorded as the first extreme pitch reducer pinion torques and the first fatigue pitch reducer pinion torques; when the verification fails, without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the pinion torques of each level of the pitch reducer are calculated under each extreme working condition and each fatigue working condition, which are recorded as the second extreme pitch reducer pinion torques and the second fatigue pitch reducer pinion torques;

[0049] Target performance calculation module: According to the first limit variable pitch reducer pinion torque at each level, the maximum torque of the variable pitch reducer pinion gears is obtained, and according to the first fatigue variable pitch reducer pinion gear torque at each level, the torque load continuous distribution is obtained, which is recorded as the first maximum torque and the first torque load continuous distribution; according to the second limit variable pitch reducer pinion torque at each level, the maximum torque of the variable pitch reducer pinion gears is obtained, and according to the second fatigue variable pitch reducer pinion gear torque at each level, the torque load continuous distribution is obtained, which is recorded as the second maximum torque and the second torque load continuous distribution;

[0050] A calibration result receiving module: obtaining a calibration result of calibrating the load of the variable pitch reducer according to the first maximum torque and the first torque load continuous distribution; obtaining a calibration result of calibrating the load of the variable pitch reducer according to the second maximum torque and the second torque load continuous distribution;

[0051] Load output module: when the calibration of the variable pitch reducer load is passed according to the first maximum torque and the first torque load continuous distribution, the first limit variable pitch reducer pinion torque at each level and the first fatigue variable pitch reducer pinion torque at each level are output; when the calibration of the variable pitch reducer load is passed according to the second maximum torque and the second torque load continuous distribution, the second limit variable pitch reducer pinion torque at each level and the second fatigue variable pitch reducer pinion torque at each level are output.

[0052] In a third aspect, the technical solution of the present invention provides a terminal, including:

[0053] A memory, used for storing a load calculation program for a variable pitch reducer;

[0054] A processor is used to implement the steps of the variable pitch reducer load calculation method as described in any of the above items when executing the variable pitch reducer load calculation program.

[0055] In a fourth aspect, the technical solution of the present invention provides a computer-readable storage medium, on which a variable pitch reducer load calculation program is stored. When the variable pitch reducer load calculation program is executed by a processor, the steps of the variable pitch reducer load calculation method as described in any of the above items are implemented.

[0056] The present invention provides a variable pitch reducer load calculation method, system, terminal and medium, which have the following beneficial effects compared with the prior art: first, a wind turbine model is built through load simulation software to ensure the comprehensive simulation of the operating state of the wind turbine under various working conditions, thereby improving the accuracy of load calculation under various extreme working conditions and fatigue working conditions. At the same time, in the calculation process, the combined efficiency of the variable pitch reducer and the variable pitch motor and the influence of the inertia torque of the variable pitch motor are first considered comprehensively. If the verification is passed under the comprehensive influence, the target load at this time is output. If the verification fails, the comprehensive influence is discarded. When the verification is passed without the comprehensive influence, the target load at this time is output, realizing a two-step verification strategy, realizing design flexibility and adaptability, being able to cope with the load verification requirements under different working conditions, and at the same time, on the basis of ensuring the accuracy of load calculation, avoiding over-design or under-design, thereby improving the operating efficiency and reliability of the wind turbine, and reducing manufacturing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1 It is a flow chart of a method for calculating the load of a variable pitch reducer provided in an embodiment of the present invention.

[0059] Figure 2 The present invention provides a block diagram showing the structure of a variable pitch reducer load calculation system.

[0060] Figure 3 It is a schematic diagram of the structure of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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 work are within the scope of protection of the present invention.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0063] The key terms appearing in the present invention are explained below.

[0064] Torque load continuous distribution (LDD): refers to the torque corresponding to the time distribution and speed distribution of each stage of the variable pitch reducer within the 20-year life of a wind turbine.

[0065] Figure 1 1 is a flow chart of a method for calculating the load of a variable pitch reducer provided by an embodiment of the present invention. Figure 1 The execution subject may be a variable pitch reducer load calculation system. The variable pitch reducer load calculation method provided in the embodiment of the present invention is executed by a computer device, and accordingly, the variable pitch reducer load calculation system runs in the computer device. According to different requirements, the order of the steps in the flowchart can be changed, and some can be omitted.

[0066] like Figure 1 As shown, the method includes the following steps.

[0067] S1, build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue conditions of the wind turbine.

[0068] The purpose of this step is to build a simulation model to simulate various working conditions. Through the simulation of various working conditions, the load parameters under each working condition can be obtained, such as the tipping moment of the blade root pitch bearing, the axial force of the pitch bearing, the radial force of the pitch bearing, etc., which are used for the subsequent calculation of the torque of the pinions of each level of the pitch reducer.

[0069] S2, taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the pinion torques of each stage of the pitch reducer are calculated under each extreme working condition and each fatigue working condition, and are recorded as the first extreme pinion torque of each stage of the pitch reducer and the first fatigue pinion torque of each stage of the pitch reducer.

[0070] This embodiment first calculates the torque of each pinion gear of the pitch reducer under the condition of considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor to improve the design accuracy. The torque of each pinion gear of the pitch reducer includes the torque under each extreme working condition and each fatigue working condition, which is used to check the maximum torque under the extreme working condition and the continuous distribution of the torque load under the fatigue working condition.

[0071] S2.1, calculation of the friction torque of the pitch bearing .

[0072] First, obtain the tipping moment of the blade root pitch bearing , Axial force of pitch bearing , radial force of pitch bearing , these parameters are obtained through software simulation. Then the following formula is used to calculate based on the above parameters.

[0073]

[0074] In the formula, is the friction coefficient of the pitch ball bearing, is the pitch bearing swing diameter; , are two coefficients.

[0075] If the pitch bearing is a ball bearing, then , ; If the pitch bearing is a roller bearing, , .

[0076] S2.2, according to the friction torque of the pitch bearing Calculate the pitch gear ring torque .

[0077] Get the pitch bearing torque , which is obtained through software simulation. Then the following formula is used to calculate based on the above parameters.

[0078] (1) If the pitch speed is greater than 0, the pitch ring gear torque .

[0079] (2) If the pitch rate is less than 0, the pitch ring gear torque .

[0080] (3) The pitch rate is equal to 0, and , then the pitch ring gear torque .

[0081] (4) The pitch rate is equal to 0, and , then the pitch ring gear torque ;

[0082] (5) In other cases, the pitch ring gear torque is 0.

[0083] S2.3, according to the pitch ring gear torque Calculate the pitch drive motor torque .

[0084] First, obtain the efficiency of the pitch drive motor , total transmission ratio from blade to pitch drive motor , Pitch drive motor moment of inertia , Pitch acceleration , these parameters can be pre-configured according to actual design requirements and then calculated using the following formulas.

[0085] .

[0086] S2.4, taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated by the following formula.

[0087] .

[0088] in, .

[0089] In the formula, For the variable pitch reducer Stage pinion torque, For the variable pitch reducer Transmission ratio.

[0090] S3, obtain the maximum torque of each level of pinion of the pitch reducer according to the first limit pitch reducer pinion torque at each level, and obtain the torque load continuous distribution according to the first fatigue pitch reducer pinion torque at each level, which are recorded as the first maximum torque and the first torque load continuous distribution.

[0091] The torque of each pinion gear of the variable pitch reducer under each working condition is obtained by calculation in step S2. This step obtains the maximum torque of each pinion gear of the variable pitch reducer under extreme working conditions and the continuous distribution of torque load under fatigue working conditions based on the calculated torque of each pinion gear of the variable pitch reducer.

[0092] Regarding the maximum torque under extreme working conditions, for each level of variable pitch reducer, the torques of the pinions of each extreme variable pitch reducer are sorted in order from large to small, and the maximum torque is selected, which is the maximum torque of the pinion of the variable pitch reducer at the current gear level.

[0093] For the continuous distribution of torque load under fatigue conditions, for each level of variable pitch reducer, the torque of each fatigue variable pitch reducer pinion is processed by the probability density processing algorithm to obtain the continuous distribution of torque load of the variable pitch reducer at the current gear level.

[0094] S4, obtaining a calibration result of the variable pitch reducer load according to the first maximum torque and the first torque load continuous distribution.

[0095] The maximum torque and torque load obtained in step S3 are continuously distributed and transmitted to the calibration end for calibration, which can be based on ISO6336 standard, ISO281 standard and ISO76 standard. The calibration end feeds back the calibration result to indicate whether the current variable pitch reducer load meets the requirements.

[0096] S5, if the verification is passed, output the torque of each pinion gear of the first limit variable pitch reducer and the torque of each pinion gear of the first fatigue variable pitch reducer.

[0097] If the verification is passed, it means that the current load of the variable pitch reducer meets the requirements, the wind turbine is reasonably designed, and the torque of each level of pinion of the variable pitch reducer under each working condition is output.

[0098] S6, if the check fails, without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, and recorded as the second limit pitch reducer pinion gear torque and the second fatigue pitch reducer pinion gear torque.

[0099] If the verification fails, in order to avoid excessive and conservative calculations, this embodiment calculates the torque of each level of pinion of the pitch reducer under each working condition without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, and performs verification in this state.

[0100] S6.1, Calculation of the friction torque of the pitch bearing .

[0101] First, obtain the tipping moment of the blade root pitch bearing , Axial force of pitch bearing , radial force of pitch bearing , these parameters are obtained through software simulation. Then the following formula is used to calculate based on the above parameters.

[0102]

[0103] In the formula, is the friction coefficient of the pitch ball bearing, is the pitch bearing swing diameter; , are two coefficients.

[0104] If the pitch bearing is a ball bearing, then , ; If the pitch bearing is a roller bearing, , .

[0105] S6.2, based on the friction torque of the pitch bearing Calculate the pitch gear ring torque .

[0106] Get the pitch bearing torque , which is obtained through software simulation. Then the following formula is used to calculate based on the above parameters.

[0107] (1) If the pitch speed is greater than 0, the pitch ring gear torque .

[0108] (2) If the pitch rate is less than 0, the pitch ring gear torque .

[0109] (3) The pitch rate is equal to 0, and , then the pitch ring gear torque .

[0110] (4) The pitch rate is equal to 0, and , then the pitch ring gear torque ;

[0111] (5) In other cases, the pitch ring gear torque is 0.

[0112] S6.3, according to the pitch gear ring torque Calculate the pitch drive motor torque .

[0113] First, obtain the efficiency of the pitch drive motor , total transmission ratio from blade to pitch drive motor , Pitch drive motor moment of inertia , Pitch acceleration , these parameters can be pre-configured according to actual design requirements and then calculated using the following formulas.

[0114] .

[0115] S6.4, taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated by the following formula.

[0116] .

[0117] in, .

[0118] In the formula, For the variable pitch reducer Stage pinion torque, For the variable pitch reducer Transmission ratio, For the variable pitch reducer Level transmission efficiency.

[0119] S7, according to the second limit variable pitch reducer pinion torque at each level, obtain the maximum torque of the variable pitch reducer pinion gears, and according to the second fatigue variable pitch reducer pinion torque at each level, obtain the torque load continuous distribution, which is recorded as the second maximum torque and the second torque load continuous distribution.

[0120] The torque of each pinion gear of the variable pitch reducer under each working condition is obtained by calculation in step S6. This step obtains the maximum torque of each pinion gear of the variable pitch reducer under extreme working conditions and the continuous distribution of torque load under fatigue working conditions based on the calculated torque of each pinion gear of the variable pitch reducer. The method for obtaining the maximum torque and the continuous distribution of torque load is the same as step S3, which will not be repeated here.

[0121] S8, obtaining a calibration result of the variable pitch reducer load according to the second maximum torque and the second torque load continuous distribution.

[0122] Similarly, the maximum torque and torque load obtained in step S7 are continuously distributed and transmitted to the verification end for verification, which can be based on ISO6336 standard, ISO281 standard and ISO76 standard. The verification end feeds back the verification result to indicate whether the current variable pitch reducer load meets the requirements.

[0123] S9, if the verification is passed, output the torque of each pinion gear of the second limit variable pitch reducer and the torque of each pinion gear of the second fatigue variable pitch reducer.

[0124] If the verification is passed, it means that the current load of the variable pitch reducer meets the requirements, the wind turbine is reasonably designed, and the torque of each level of pinion of the variable pitch reducer under each working condition is output.

[0125] S10: If the verification fails, the operating conditions or model parameters are changed, and the limit operating conditions and fatigue operating conditions of the wind turbine are recalculated.

[0126] If the check fails again, it means that the current variable pitch reducer load does not meet the requirements and the wind turbine design is unreasonable. At this time, it is necessary to change the operating conditions and recalculate the limit conditions and fatigue conditions of the wind turbine.

[0127] An embodiment of a variable pitch reducer load calculation method is described in detail above. Based on the variable pitch reducer load calculation method described in the above embodiment, an embodiment of the present invention further provides a variable pitch reducer load calculation system corresponding to the method.

[0128] Figure 2 is a schematic block diagram of the structure of a variable pitch reducer load calculation system provided in an embodiment of the present invention. In this embodiment, the variable pitch reducer load calculation system 200 can be divided into multiple functional modules according to the functions it performs, such as Figure 2 The functional modules may include: a working condition simulation module 210, a pinion torque calculation module 220, a target performance calculation module 230, a verification result receiving module 240, and a load output module 250. The module referred to in the present invention refers to a series of computer program segments that can be executed by at least one processor and can complete fixed functions, which are stored in a memory.

[0129] Working condition simulation module 210: Build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue working conditions of the wind turbine.

[0130] Pinion torque calculation module 220: Under the condition of considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the pinion torques of each level of the pitch reducer are calculated respectively under each extreme working condition and each fatigue working condition, and are recorded as the first extreme pinion torques of each level of the pitch reducer and the first fatigue pinion torques of each level of the pitch reducer; when the verification fails, under the condition of not considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the pinion torques of each level of the pitch reducer are calculated respectively under each extreme working condition and each fatigue working condition, and are recorded as the second extreme pinion torques of each level of the pitch reducer and the second fatigue pinion torques of each level of the pitch reducer.

[0131] Target performance calculation module 230: According to the first limit variable pitch reducer pinion torque at each level, the maximum torque of the variable pitch reducer pinion gears is obtained, and according to the first fatigue variable pitch reducer pinion torque at each level, the torque load continuous distribution is obtained, which are recorded as the first maximum torque and the first torque load continuous distribution; according to the second limit variable pitch reducer pinion torque at each level, the maximum torque of the variable pitch reducer pinion gears is obtained, and according to the second fatigue variable pitch reducer pinion torque at each level, the torque load continuous distribution is obtained, which are recorded as the second maximum torque and the second torque load continuous distribution.

[0132] The calibration result receiving module 240 obtains the calibration result of the variable pitch reducer load according to the first maximum torque and the first torque load continuous distribution; obtains the calibration result of the variable pitch reducer load according to the second maximum torque and the second torque load continuous distribution.

[0133] Load output module 250: when the calibration of the variable pitch reducer load according to the first maximum torque and the first torque load continuous distribution is passed, the first extreme variable pitch reducer pinion torque at each level and the first fatigue variable pitch reducer pinion torque at each level are output; when the calibration of the variable pitch reducer load according to the second maximum torque and the second torque load continuous distribution is passed, the second extreme variable pitch reducer pinion torque at each level and the second fatigue variable pitch reducer pinion torque at each level are output.

[0134] The variable pitch reducer load calculation system of this embodiment is used to implement the aforementioned variable pitch reducer load calculation method. Therefore, the specific implementation method of this system can be seen in the embodiment part of the variable pitch reducer load calculation method in the previous text. Therefore, its specific implementation method can refer to the description of the corresponding embodiments of each part, which will not be elaborated here.

[0135] In addition, since the variable pitch reducer load calculation system of the present embodiment is used to implement the aforementioned variable pitch reducer load calculation method, its function corresponds to that of the aforementioned method and will not be described in detail here.

[0136] Figure 3 A schematic diagram of the structure of a terminal 300 provided in an embodiment of the present invention includes: a processor 310, a memory 320 and a communication unit 330. The processor 310 is used to implement the following steps when implementing the variable pitch reducer load calculation program stored in the memory 320:

[0137] Build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue conditions of the wind turbine;

[0138] Taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, which are recorded as the first limit pitch reducer pinion gear torque and the first fatigue pitch reducer pinion gear torque.

[0139] The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the first limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the first fatigue pitch reducer, which are recorded as the first maximum torque and the first torque load continuous distribution;

[0140] Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the first maximum torque and the first torque load continuous distribution;

[0141] If the check is passed, the pinion torques of each level of the first limit variable pitch reducer and the pinion torques of each level of the first fatigue variable pitch reducer are output;

[0142] If the check fails, without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, and recorded as the second limit pitch reducer pinion gear torque and the second fatigue pitch reducer pinion gear torque;

[0143] The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the second limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the second fatigue pitch reducer, which is recorded as the second maximum torque and the second torque load continuous distribution;

[0144] Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the second maximum torque and the second torque load continuous distribution;

[0145] If the check is passed, the pinion torques of each level of the second limit pitch reducer and the pinion torques of each level of the second fatigue pitch reducer are output;

[0146] If the verification fails, change the operating conditions or model parameters and recalculate the wind turbine's limit operating conditions and fatigue operating conditions.

[0147] The terminal 300 includes a processor 310, a memory 320 and a communication unit 330. These components communicate via one or more buses. It can be understood by those skilled in the art that the structure of the server shown in the figure does not constitute a limitation of the present invention, and it can be a bus structure or a star structure, and can also include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0148] The memory 320 can be used to store the execution instructions of the processor 310, and the memory 320 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. When the execution instructions in the memory 320 are executed by the processor 310, the terminal 300 can perform some or all of the steps in the following method embodiments.

[0149] The processor 310 is the control center of the storage terminal, and uses various interfaces and lines to connect various parts of the entire electronic terminal. It runs or executes software programs and / or modules stored in the memory 320, and calls data stored in the memory to perform various functions of the electronic terminal and / or process data. The processor can be composed of an integrated circuit (IC), for example, it can be composed of a single packaged IC, or it can be composed of multiple packaged ICs with the same or different functions. For example, the processor 310 can only include a central processing unit (CPU). In the embodiment of the present invention, the CPU can be a single computing core or multiple computing cores.

[0150] The communication unit 330 is used to establish a communication channel so that the storage terminal can communicate with other terminals, receive user data sent by other terminals or send user data to other terminals.

[0151] The present invention also provides a computer storage medium, wherein the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0152] The computer storage medium stores a variable pitch reducer load calculation program, and when the variable pitch reducer load calculation program is executed by the processor, the following steps are implemented:

[0153] Build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue conditions of the wind turbine;

[0154] Taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, which are recorded as the first limit pitch reducer pinion gear torque and the first fatigue pitch reducer pinion gear torque.

[0155] The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the first limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the first fatigue pitch reducer, which are recorded as the first maximum torque and the first torque load continuous distribution;

[0156] Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the first maximum torque and the first torque load continuous distribution;

[0157] If the check is passed, the pinion torques of each level of the first limit variable pitch reducer and the pinion torques of each level of the first fatigue variable pitch reducer are output;

[0158] If the check fails, without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, and recorded as the second limit pitch reducer pinion gear torque and the second fatigue pitch reducer pinion gear torque;

[0159] The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the second limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the second fatigue pitch reducer, which is recorded as the second maximum torque and the second torque load continuous distribution;

[0160] Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the second maximum torque and the second torque load continuous distribution;

[0161] If the check is passed, the pinion torques of each level of the second limit pitch reducer and the pinion torques of each level of the second fatigue pitch reducer are output;

[0162] If the verification fails, change the operating conditions or model parameters and recalculate the wind turbine's limit operating conditions and fatigue operating conditions.

[0163] Those skilled in the art can clearly understand that the technology in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution in the embodiments of the present invention, in essence or in other words, the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes, including several instructions for enabling a computer terminal (which can be a personal computer, a server, or a second terminal, a network terminal, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention.

[0164] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0165] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0166] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0167] The above disclosure is only a preferred embodiment of the present invention, but the present invention is not limited thereto. Any non-creative changes that can be thought of by a person skilled in the art, as well as several improvements and modifications made without departing from the principle of the present invention, should fall within the protection scope of the present invention.

Claims

1. A method for calculating the load of a variable pitch reducer, characterized in that: The following steps are involved: Build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue conditions of the wind turbine; Taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, which are recorded as the first limit pitch reducer pinion gear torque and the first fatigue pitch reducer pinion gear torque. The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the first limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the first fatigue pitch reducer, which are recorded as the first maximum torque and the first torque load continuous distribution; Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the first maximum torque and the first torque load continuous distribution; If the check is passed, the pinion torques of each level of the first limit variable pitch reducer and the pinion torques of each level of the first fatigue variable pitch reducer are output; If the check fails, without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each limit working condition and each fatigue working condition, and recorded as the second limit pitch reducer pinion gear torque and the second fatigue pitch reducer pinion gear torque; The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the second limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the second fatigue pitch reducer, which is recorded as the second maximum torque and the second torque load continuous distribution; Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the second maximum torque and the second torque load continuous distribution; If the check is passed, the pinion torques of each level of the second limit pitch reducer and the pinion torques of each level of the second fatigue pitch reducer are output; If the verification fails, change the operating conditions or model parameters and recalculate the wind turbine's limit operating conditions and fatigue operating conditions.

2. The variable pitch reducer load calculation method according to claim 1, characterized in that: Taking into account the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the torque of each pinion gear of the pitch reducer is calculated under each extreme working condition and each fatigue working condition, including: Step 1: Calculate the friction torque of the pitch bearing ; Step 2: According to the friction torque of the pitch bearing Calculate the pitch gear ring torque ; Step 3: According to the pitch gear ring torque Calculate the pitch drive motor torque ; Step 4: Under the condition that the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor are taken into account, the torque of the pinion gears of each level of the pitch reducer is calculated by formula (1); under the condition that the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor are not taken into account, the torque of the pinion gears of each level of the pitch reducer is calculated by formula (2); （1） （2） in, ; In the formula, For the variable pitch reducer Stage pinion torque, For the variable pitch reducer Transmission ratio; For the variable pitch reducer Level transmission efficiency.

3. The method for calculating the load of a variable pitch reducer according to claim 2, characterized in that: Calculation of the friction torque of the pitch bearing Specifically include: Obtain the tipping moment of the blade root pitch bearing , Axial force of pitch bearing , radial force of pitch bearing ; The friction torque of the pitch bearing is calculated by the following formula , In the formula, is the friction coefficient of the pitch ball bearing, is the pitch bearing swing diameter; , are two coefficients.

4. The method for calculating the load of a variable pitch reducer according to claim 2, characterized in that: According to the friction torque of the pitch bearing Calculate the pitch gear ring torque Specifically include: Get the pitch bearing torque ; The pitch gear ring torque is calculated by the following formula ; (1) If the pitch speed is greater than 0, the pitch ring gear torque ; (2) If the pitch rate is less than 0, the pitch ring gear torque ; (3) The pitch rate is equal to 0, and , then the pitch ring gear torque ; (4) The pitch rate is equal to 0, and , then the pitch ring gear torque ; (5) In other cases, the pitch ring gear torque is 0.

5. The method for calculating the load of a variable pitch reducer according to claim 2, characterized in that: According to the pitch gear ring torque Calculate the pitch drive motor torque Specifically include: Get the efficiency of the pitch drive motor , total transmission ratio from blade to pitch drive motor , Pitch drive motor moment of inertia , Pitch acceleration ; The pitch drive motor torque is calculated by the following formula , 。 6. The method for calculating the load of a variable pitch reducer according to any one of claims 1 to 4, characterized in that: The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the limit torque of each level of the pinion gear of the pitch reducer, which specifically includes: For each level of variable pitch reducer, the torques of the pinions of the variable pitch reducers are sorted from large to small, and the maximum torque is selected, that is, the maximum torque of the pinion of the variable pitch reducer at the current gear level.

7. The method for calculating the load of a variable pitch reducer according to any one of claims 1 to 4, characterized in that: The torque load continuous distribution is obtained according to the torque of each level of pinion of the fatigue variable pitch reducer, including: For each level of variable pitch reducer, the torque of each fatigue variable pitch reducer pinion is processed by the probability density processing algorithm to obtain the continuous distribution of the torque load of the variable pitch reducer at the current gear level.

8. A variable pitch reducer load calculation system, characterized in that: include, Working condition simulation module: Build a wind turbine model through load simulation software to simulate various extreme working conditions and fatigue conditions of the wind turbine; Pinion torque calculation module: considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the pinion torques of each level of the pitch reducer are calculated under each extreme working condition and each fatigue working condition, which are recorded as the first extreme pitch reducer pinion torques and the first fatigue pitch reducer pinion torques; when the verification fails, without considering the combined efficiency of the pitch reducer and the pitch motor and the inertia torque of the pitch motor, the pinion torques of each level of the pitch reducer are calculated under each extreme working condition and each fatigue working condition, which are recorded as the second extreme pitch reducer pinion torques and the second fatigue pitch reducer pinion torques; Target performance calculation module: obtain the maximum torque of each level of the pinion gear of the pitch reducer according to the first limit torque of each level of the pinion gear of the pitch reducer, and obtain the torque load continuous distribution according to the first fatigue torque of each level of the pinion gear of the pitch reducer, which are recorded as the first maximum torque and the first torque load continuous distribution; The maximum torque of each level of the pinion gear of the pitch reducer is obtained according to the second limit torque of each level of the pinion gear of the pitch reducer, and the torque load continuous distribution is obtained according to the torque of each level of the pinion gear of the second fatigue pitch reducer, which is recorded as the second maximum torque and the second torque load continuous distribution; A calibration result receiving module is used for obtaining a calibration result of the variable pitch reducer load according to the first maximum torque and the first torque load continuous distribution; Obtaining a calibration result of calibrating the load of the variable pitch reducer according to the second maximum torque and the second torque load continuous distribution; Load output module: when the calibration of the variable pitch reducer load is passed according to the first maximum torque and the first torque load continuous distribution, the first limit variable pitch reducer pinion torque at each level and the first fatigue variable pitch reducer pinion torque at each level are output; when the calibration of the variable pitch reducer load is passed according to the second maximum torque and the second torque load continuous distribution, the second limit variable pitch reducer pinion torque at each level and the second fatigue variable pitch reducer pinion torque at each level are output.

9. A terminal, characterized in that: include: A memory, used for storing a load calculation program for a variable pitch reducer; A processor is used to implement the steps of the variable pitch reducer load calculation method as described in any one of claims 1 to 6 when executing the variable pitch reducer load calculation program.

10. A computer-readable storage medium, characterized in that: The readable storage medium stores a variable pitch reducer load calculation program, and when the variable pitch reducer load calculation program is executed by the processor, the steps of the variable pitch reducer load calculation method according to any one of claims 1 to 6 are implemented.

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