Load measuring method and device for torque arm of fan gearbox and medium
By installing displacement sensors on both sides of the torque arm of the wind turbine gearbox, the vertical displacement is decoupled and combined with the displacement stiffness relationship, which solves the problem of ignoring vertical load in the existing technology, realizes more accurate load assessment and closed-loop control, and protects the transmission chain structural components.
Patent Information
- Application Number
- CN202511676061.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-01-27
AI Technical Summary
In the existing technology, the torque arm load monitoring method of wind turbine gearbox only considers torsional load and ignores vertical load, resulting in inaccurate monitoring.
Displacement sensors are installed on the first and second sides of the torque arm to obtain composite measurements of the sum and difference of rotational and vertical displacements. The pure vertical displacement is decoupled through a system of two linear equations and the vertical load is determined by combining it with a preset displacement stiffness relationship.
It enables precise quantification of the additional vertical load that is ignored in traditional assessments, improves the accuracy of torque arm strength and elastic support fatigue life assessment, and has closed-loop control capability to prevent damage to transmission chain structural components.
Smart Images
Figure CN121409602A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present invention relate to the field of wind turbine monitoring, and particularly to the load measurement method, equipment and medium for the torque arm of a wind turbine gearbox. Background Technology
[0002] A wind turbine (or simply wind turbine) is a device that converts wind energy into electrical energy. In large wind turbines, the drivetrain system is one of the core components, typically including the impeller, main shaft, gearbox, and generator. The gearbox is used to increase the impeller's low speed to the high speed required by the generator. The gearbox is usually mounted on the nacelle base via a torque arm and elastic supports on both sides to transmit and withstand the complex loads generated during operation.
[0003] During wind turbine operation, the torque arm and its elastic support bear loads. To monitor the health of the drivetrain system, some solutions have attempted to install displacement sensors on the torque arm to monitor the load it bears. However, most of these monitoring methods only consider the torsional load on the torque arm, neglecting the vertical load, resulting in inaccurate monitoring. Summary of the Invention
[0004] The purpose of this application is to provide a method, device and medium for measuring the load of the torque arm of a wind turbine gearbox, so as to solve the problem that most related monitoring methods only consider the torsional load borne by the torque arm, while ignoring the vertical load borne by the torque arm, resulting in inaccurate monitoring.
[0005] To address the aforementioned technical problems, embodiments of the present invention provide a method for measuring the load of a torque arm in a wind turbine gearbox. A first displacement sensor is provided on a first side of the torque arm, and a second displacement sensor is provided on a second side of the torque arm. The method includes: acquiring a first measurement value from the first displacement sensor and a second measurement value from the second displacement sensor; wherein the first measurement value includes the sum of the rotational displacement and vertical displacement of the first side, and the second measurement value includes the difference between the rotational displacement and vertical displacement of the second side; calculating the vertical displacement of the torque arm based on the first and second measurement values; and determining the vertical loads on the first and second sides according to the vertical displacement value and a preset displacement stiffness relationship.
[0006] In addition, embodiments of the present invention also provide an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the load measurement method for the torque arm of the wind turbine gearbox as described above.
[0007] In addition, embodiments of the present invention also provide a computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, it implements the load measurement method for the torque arm of the wind turbine gearbox as described above.
[0008] In this embodiment of the invention, displacement sensors are respectively installed on the first and second sides of the torque arm to obtain two composite measurement values containing different information. Specifically, the first measurement value is defined as the sum of the rotational displacement and the vertical displacement, while the second measurement value is defined as the difference between the rotational displacement and the vertical displacement. Since these two measurement values are obtained simultaneously, they constitute a system of two linear equations. By solving this system of equations, the pure vertical displacement can be accurately separated from the composite value. After obtaining the accurate vertical displacement, the vertical load corresponding to the vertical displacement is further determined according to a preset displacement stiffness relationship. Thus, the additional vertical load that is ignored in traditional evaluation is accurately quantified, improving the accuracy of the torque arm strength and elastic support fatigue life assessment.
[0009] In addition, the method further includes: acquiring the torsional load on the first side and the torsional load on the second side; combining the vertical load on the first side with the torsional load on the first side to determine the total support load on the first side; and combining the vertical load on the second side with the torsional load on the second side to determine the total support load on the second side. This provides a more comprehensive and accurate total load assessment of the elastic support, offering more complete data support for strength and lifespan evaluation.
[0010] In addition, the elastic support of the torque arm is equipped with a temperature sensor. The preset displacement stiffness relationship includes multiple displacement stiffness relationships corresponding to different temperature ranges. Based on the vertical displacement value and the preset displacement stiffness relationship, the stiffness value of the elastic support of the torque arm is obtained, including: acquiring the current temperature of the elastic support; selecting a corresponding target displacement stiffness relationship from the multiple displacement stiffness relationships according to the current temperature; and obtaining the stiffness value of the elastic support of the torque arm based on the vertical displacement value and the target displacement stiffness relationship. Therefore, by introducing temperature compensation, the influence of temperature changes on stiffness characteristics is eliminated, further improving the accuracy and stability of vertical load calculation.
[0011] In addition, after determining the vertical loads on the first and second sides, the method further includes: comparing the vertical loads on the first and second sides with a preset load threshold; and when the vertical load on either the first or second side exceeds the load threshold, sending a control command to the main control system of the wind turbine to reduce the deformation of the wind turbine's drivetrain. Thus, this method not only has a monitoring function but also closed-loop control capability. By proactively intervening when a risk occurs (i.e., overload), it can effectively protect the drivetrain structural components and elastic supports, reducing potential quality costs.
[0012] Furthermore, the number of the first displacement sensors is at least two, and the number of the second displacement sensors is at least two. The process of acquiring the first measured value of the first displacement sensor and the second measured value of the second displacement sensor includes: acquiring measurement data from at least two of the first displacement sensors and performing fusion processing to obtain the first measured value; acquiring measurement data from at least two of the second displacement sensors and performing fusion processing to obtain the second measured value. Thus, on the one hand, data redundancy improves the reliability of the measurement system, preventing system failure due to the failure of a single sensor; on the other hand, data fusion effectively suppresses measurement noise and outliers, improving the signal-to-noise ratio and accuracy of the first and second measured values, thereby enhancing the calculation accuracy of vertical displacement and vertical load. Attached Figure Description
[0013] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0014] Figure 1 This is a structural diagram of a wind turbine drive train system according to an embodiment of this application; Figure 2 This is a schematic diagram illustrating the measurement principle of a torque arm according to an embodiment of this application; Figure 3 This is a flowchart of a load measurement method for the torque arm of a wind turbine gearbox according to an embodiment of this application; Figure 4 This is an example diagram of the preset displacement stiffness relationship used in a load measurement method for the torque arm of a wind turbine gearbox according to an embodiment of this application. Figure 5 This is a structural diagram of the electronic device used in a load measurement method for the torque arm of a wind turbine gearbox according to an embodiment of this application. Detailed Implementation
[0015] In wind turbine generator sets (or simply wind turbines), the drive train system is one of the core components. The gearbox is typically mounted on the nacelle base via a torque arm and elastic supports on both sides. During wind turbine operation, the torque arm and its elastic supports bear complex loads.
[0016] The inventors discovered that in related technologies, when monitoring the load on a torque arm, most methods only consider the rotation of the torque arm caused by torsional loads (such as the torque Mx transmitted by a wind turbine), assuming that the torque arm is only undergoing rotational motion. Therefore, traditional monitoring methods mostly focus only on torsional loads, ignoring the fact that the torque arm itself also bears vertical loads, resulting in inaccurate monitoring.
[0017] Further research by the inventors revealed that the root cause of the aforementioned problems lies in the fact that the wind turbine drivetrain system (such as the nacelle base and main shaft system) is not an ideal rigid body. Under immense wind loads, its structure undergoes a certain degree of elastic deformation. This system-level deformation causes the torque arm to undergo overall translational displacement (vertical displacement) along the Z-axis (vertical direction). The displacement sensors installed on both sides of the torque arm in related technologies measure values (e.g., X1, X2) that are actually composite values, encompassing both rotational displacement (e.g., Δr) caused by rotational motion and vertical displacement (e.g., Δh) caused by system deformation. Because related technologies fail to recognize the existence of the vertical displacement Δh or cannot accurately separate it from the composite measurement value, they cannot quantify the additional vertical load (e.g., Fz) caused by this vertical displacement. This leads to inaccurate assessments of the torque arm strength and the fatigue life of the elastic support.
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the various embodiments of the present invention to facilitate a better understanding of this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.
[0019] One embodiment of the present invention relates to a load measurement method for the torque arm of a wind turbine gearbox, which can be applied in the field of wind turbine monitoring. Specifically, this method can be applied to the transmission chain monitoring system or condition monitoring system of a large wind turbine generator set. The execution subject of this method can be a dedicated load monitoring device, the main control system of the wind turbine, or a remote monitoring center server. To solve the above-mentioned technical problems, an embodiment of the present invention provides a load measurement method for the torque arm of a wind turbine gearbox. A first displacement sensor is provided on the first side of the torque arm, and a second displacement sensor is provided on the second side of the torque arm. The method includes: acquiring a first measurement value from the first displacement sensor and a second measurement value from the second displacement sensor; wherein, the first measurement value includes the sum of the rotational displacement and the vertical displacement of the first side, and the second measurement value includes the difference between the rotational displacement and the vertical displacement of the second side; calculating the vertical displacement of the torque arm based on the first measurement value and the second measurement value; and determining the vertical load of the first side and the second side according to the vertical displacement value and a preset displacement stiffness relationship.
[0020] In this embodiment of the invention, displacement sensors are respectively installed on the first and second sides of the torque arm to obtain two composite measurement values containing different information. Specifically, the first measurement value is defined as the sum of the rotational displacement and the vertical displacement, while the second measurement value is defined as the difference between the rotational displacement and the vertical displacement. Since these two measurement values are obtained simultaneously, they constitute a system of two linear equations. By solving this system of equations, the pure vertical displacement can be accurately separated from the composite value. After obtaining the accurate vertical displacement, the vertical load corresponding to the vertical displacement is further determined according to a preset displacement stiffness relationship. Thus, the additional vertical load that is ignored in traditional evaluation is accurately quantified, improving the accuracy of the torque arm strength and elastic support fatigue life assessment.
[0021] The following is a detailed description of the implementation details of the load measurement method for the torque arm of the wind turbine gearbox according to an embodiment of the present invention. The following content is only for the convenience of understanding and is not necessary for implementing this solution.
[0022] like Figure 1 As shown, this embodiment of the invention provides a wind turbine drivetrain system structure. The system is mounted on the nacelle base and includes components such as a main bearing, gearbox, flexible coupling, and generator. The gearbox is mounted via a torque arm, with both sides of the torque arm elastically supported and fixed to corresponding gearbox mounting seats on the nacelle base.
[0023] It should be noted that the elastic support described in this application is preferably a hydraulic elastic support, but it can also be configured as, but is not limited to, a metal elastic support, a rubber-metal composite elastic support, or a polymer elastomer support. Those skilled in the art will understand that different types of elastic supports will correspond to different "preset displacement stiffness relationships." The method of this invention aims to achieve accurate calculation of vertical loads by applying a preset stiffness function specific to the type of support used, without being limited to the specific material or structure of the elastic support.
[0024] like Figure 2 The diagram illustrates the measurement principle of the torque arm in an embodiment of the present invention. This method involves measuring the torque arm on its first side (e.g., ...). Figure 2 (left side) and second side (e.g.) Figure 2 Near the right side of the [unclear], each is equipped with a displacement sensor. These displacement sensors can be mounted on fixed components such as the nacelle base or gearbox mounting bracket to measure the relative displacement of the torque arm (as a moving component) relative to the fixed component.
[0025] like Figure 3 As shown, the system monitoring steps include steps 110 to 130.
[0026] In step 110, a first measurement value from the first displacement sensor and a second measurement value from the second displacement sensor are acquired. The first measurement value is labeled X1, and the second measurement value is labeled X2.
[0027] It should be noted that the first measured value includes the sum of the rotational displacement and the vertical displacement on the first side, and the second measured value includes the difference between the rotational displacement and the vertical displacement on the second side. Figure 2 As shown, the motion of the torque arm is a composite motion, which includes both the rotational displacement (denoted as Δr) caused by the torsional load Mx and the overall vertical translational displacement (denoted as Δh) caused by the vertical (Z-direction) deformation of the entire transmission chain system (such as the nacelle base) under wind load.
[0028] In a specific example, such as Figure 2In this embodiment of the invention, the rotational motion of the torque arm (caused by the torsional load Mx) is first defined as clockwise rotation (i.e., rotation from the upper left to the lower right). Further, the measurement coordinate system of the displacement sensor installed on the first side (left side) can be defined as upwards as positive, and similarly, the measurement coordinate system of the displacement sensor installed on the second side (right side) can be defined as downwards as positive. Based on this, when a pure vertical translation Δh (upwards as positive) occurs: the left sensor reading is +Δh, and the right sensor reading (downwards as positive) is -Δh. When a pure rotational displacement Δr (clockwise) occurs: the left side moves upwards, with a reading of +Δr; the right side moves downwards, also with a reading of +Δr. Therefore, the composite measurement values of the two sensors (i.e., the actual sensor readings) are respectively: X1 = Δr + Δh and X2 = Δr + (-Δh) = Δr - Δh. Through this specific cross-definition of the positive direction of the sensors, a system of two linear equations can be constructed, thereby enabling precise mathematical decoupling of Δr and Δh through solving the equations.
[0029] In step 120, the vertical displacement of the torque arm is calculated based on the first and second measured values. The vertical displacement of the torque arm is denoted as Δh, and the rotational displacement of the torque arm is denoted as Δr.
[0030] In a specific example, since the first measured value (X1) and the second measured value (X2) have been constructed into an ideal system of two linear equations in the previous embodiment (i.e., X1 = Δr + Δh and X2 = Δr - Δh), the specific steps to solve this system of equations are: subtract the first measured value from the second measured value and divide by two to accurately separate the vertical displacement Δh of the torque arm, i.e., vertical displacement Δh = (X1 - X2) / 2. Correspondingly, the rotational displacement Δr of the torque arm can also be obtained by summing the two measured values and dividing by two: rotational displacement Δr = (X1 + X2) / 2. In this way, the present invention uses simple difference and summation operations to accurately decouple the pure vertical displacement Δh and the pure rotational displacement Δr from the composite measured values.
[0031] The vertical displacement Δh is the core focus of this invention, serving as a key input for subsequently determining the additional vertical load Fz. The rotational displacement Δr, an intermediate product in the decoupling process, also has significant application value; for example, it can be used in conjunction with the vertical displacement to determine the degree of deformation of the elastic support.
[0032] In step 130, the vertical loads on the first and second sides are determined based on the vertical displacement value and a preset displacement stiffness relationship. The vertical load is denoted as Fz.
[0033] In a specific example, such as Figure 4As shown, the preset displacement-stiffness relationship is a function K(Δh). This function K(Δh) is a "Z-direction displacement-stiffness function" provided by the hydraulic elastic support supplier, which describes the nonlinear relationship between the vertical stiffness of the elastic support (e.g., unit: KN / mm) and the vertical displacement Δh (e.g., unit: mm). Therefore, the steps to determine the vertical load Fz specifically include: First, based on the vertical displacement value Δh and the preset displacement-stiffness relationship K(Δh), the stiffness value of the elastic support of the torsion arm is obtained. That is, the vertical displacement Δh calculated in step 1 is substituted into the displacement-stiffness function K(Δh) for querying or calculation to obtain the support stiffness K(Δh) corresponding to the current displacement Δh. Then, the vertical displacement value Δh is multiplied by the queried (or calculated) stiffness value K(Δh) to determine the vertical load Fz on the first and second sides, i.e.: Fz = Δh × K(Δh). This step accurately calculates the additional vertical load Fz caused by system deformation, thereby improving the accuracy of the evaluation.
[0034] In an optional example, to obtain a more comprehensive load assessment of the elastic support, the method further includes: acquiring the torsional load on a first side and the torsional load on a second side; combining the vertical load on the first side with the torsional load on the first side to determine the total support load on the first side; and combining the vertical load on the second side with the torsional load on the second side to determine the total support load on the second side.
[0035] Specifically, the torsional loads on the first and second sides mentioned above are opposites, meaning they are equal in magnitude but opposite in direction. The steps to obtain these two torsional loads include: obtaining the torsional load Mx input from the center of the wind turbine's gearbox (i.e., the hub center), and the support span L of the elastic supports on both sides of the torque arm (see...). Figure 2 Then, the magnitude of the torsional load Fr is calculated using the formula Fr=Mx / L. Therefore, the torsional load on the first side is Fr1=+Fr, and the torsional load on the second side is Fr2=-Fr.
[0036] Furthermore, after obtaining the vertical load Fz and torsional loads Fr1 and Fr2, the method proceeds by combining the vertical load Fz and the torsional load Fr1 on the first side to determine the total support load FrL on the first side. For example, FrL = Fz + Fr1 = Fz + Fr. Similarly, the vertical load Fz and the torsional load Fr2 on the second side are combined to determine the total support load FrR on the second side. For example, FrR = Fz + Fr2 = Fz - Fr. It is important to note that this combination is a vector combination, meaning the above formula represents the combination of components in the vertical (Z-direction). In this way, a more comprehensive and accurate total load assessment of the elastic support is obtained, providing more complete data support for subsequent strength assessment and fatigue life analysis.
[0037] In this embodiment of the invention, the stiffness characteristics of the elastic support, especially the hydraulic elastic support, may be affected by temperature. Therefore, in an optional embodiment, a temperature sensor is also provided on the elastic support of the torsion arm. In this case, the preset displacement stiffness relationship K(Δh) will no longer be a single curve, but will include multiple displacement stiffness relationships corresponding to different temperature ranges. For example, the system can pre-calibrate and store multiple sets of displacement stiffness functions: F_T1(Δh) (corresponding to temperature range T1, such as -10°C to 0°C), F_T2(Δh) (corresponding to temperature range T2, such as 0°C to 10°C), etc. In this case, the step of obtaining the stiffness value based on the vertical displacement value and the preset displacement stiffness relationship includes: first, obtaining the current temperature of the elastic support through the temperature sensor; then, selecting the corresponding target displacement stiffness relationship from multiple displacement stiffness relationships according to the current temperature. For example, if the current temperature is 5°C, then the function F_T2(Δh) corresponding to the T2 range is selected as the target displacement stiffness relationship. Finally, based on the vertical displacement value Δh and the selected target displacement stiffness relationship (such as F_T2(Δh)), the stiffness value of the elastic support of the torsion arm is obtained. This design, by introducing temperature compensation, eliminates the influence of temperature changes on stiffness characteristics, and can further improve the accuracy and stability of the vertical load Fz calculation.
[0038] In an optional example, to improve the reliability and accuracy of the measurement, the number of first displacement sensors can be at least two, and the number of second displacement sensors can also be at least two. In this case, the step of obtaining the first measurement value X1 includes: acquiring real-time measurement data from at least two first displacement sensors and performing data fusion processing (e.g., using algorithms such as weighted averaging, median filtering, or Kalman filtering) to obtain a more stable and accurate first measurement value X1. Similarly, the step of obtaining the second measurement value X2 also includes: acquiring measurement data from at least two second displacement sensors and performing similar fusion processing to obtain the second measurement value X2. This design, on the one hand, improves the reliability of the measurement system through data redundancy, preventing system failure due to the failure of a single sensor; on the other hand, data fusion can effectively suppress measurement noise and outliers, improving the signal-to-noise ratio and accuracy of the measurement values, thereby enhancing the accuracy of subsequent displacement calculations.
[0039] In an optional embodiment, this method can also be used to monitor the torsional stiffness health status of the elastic support. Specifically, after solving for the torsion arm rotational displacement Δr = (X1 + X2) / 2, and after obtaining the torsional load Fr = Mx / L, the system can further calculate: K_torsional = Fr / Δr, where K_torsional is the real-time torsional stiffness of the elastic support. The system can compare this real-time torsional stiffness K_torsional with a preset healthy stiffness baseline (e.g., an initial stiffness value provided by the supplier). When the real-time torsional stiffness K_torsional deviates from the healthy stiffness baseline by more than a preset threshold (e.g., a decrease of more than 20%), the system can determine that the performance of the elastic support has degraded or failed, and generate a corresponding maintenance alarm. This approach utilizes the pure rotational displacement Δr decoupled from the present solution, providing an online health assessment method that is difficult to achieve using traditional methods.
[0040] In an optional example, this method can also have closed-loop control capability. After determining the vertical load Fz on the first and second sides, the method further includes comparing the vertical load Fz (or the combined total support load FrL, FrR) on the first and second sides with a preset load threshold. When the vertical load (or total load) on the first or second side exceeds the load threshold, a control command is actively sent to the wind turbine's main control system to reduce the deformation of the wind turbine's drivetrain. For example, the control command may include controlling the wind turbine to operate at reduced capacity, adjusting the yaw angle, or changing the pitch angle to reduce the impact and deformation of the wind load on the drivetrain system. This design enables the method to not only have monitoring capabilities but also closed-loop control capabilities, allowing for proactive intervention when risks occur (i.e., load over-limit), effectively protecting drivetrain structural components and elastic supports, and reducing potential quality costs.
[0041] In this embodiment of the invention, displacement sensors are respectively installed on the first and second sides of the torque arm to obtain two composite measurement values containing different information. Specifically, the first measurement value is defined as the sum of the rotational displacement and the vertical displacement, while the second measurement value is defined as the difference between the rotational displacement and the vertical displacement. Since these two measurement values are obtained simultaneously, they constitute a system of two linear equations. By solving this system of equations, the pure vertical displacement can be accurately separated from the composite value. After obtaining the accurate vertical displacement, the vertical load corresponding to the vertical displacement is further determined according to a preset displacement stiffness relationship. Thus, the additional vertical load that is ignored in traditional evaluation is accurately quantified, improving the accuracy of the torque arm strength and elastic support fatigue life assessment.
[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0043] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0044] Another embodiment of the present invention relates to a terminal / electronic device / server, such as Figure 5 As shown, it includes at least one processor 201; and a memory 202 communicatively connected to at least one processor 201; wherein the memory 202 stores instructions executable by at least one processor 201, the instructions being executed by at least one processor 201 to enable at least one processor 201 to perform the load measurement method for the torque arm of the wind turbine gearbox as described above.
[0045] The memory 202 and processor 201 are connected via a bus, which may include any number of interconnecting buses and bridges, connecting various circuits of one or more processors 201 and memory 202 together. The bus may also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by processor 201 is transmitted over a wireless medium via an antenna, which further receives data and transmits it to processor 201.
[0046] Processor 201 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory 202 can be used to store data used by processor 201 during operation.
[0047] Another embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the method embodiments described above.
[0048] That is, those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
[0049] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.
Claims
1. A method for measuring the load of the torque arm of a wind turbine gearbox, characterized in that, A first displacement sensor is provided on a first side of the torque arm, and a second displacement sensor is provided on a second side of the torque arm. The method includes: Acquire a first measurement value from the first displacement sensor and a second measurement value from the second displacement sensor; wherein the first measurement value includes the sum of the rotational displacement and the vertical displacement of the first side, and the second measurement value includes the difference between the rotational displacement and the vertical displacement of the second side; Based on the first and second measured values, the vertical displacement of the torque arm is calculated. Based on the vertical displacement value and the preset displacement stiffness relationship, the vertical loads on the first side and the second side are determined.
2. The load measurement method for the torque arm of the wind turbine gearbox according to claim 1, wherein the step of calculating the vertical displacement of the torque arm based on the first measured value and the second measured value includes: The vertical displacement of the torque arm is obtained by subtracting the first and second measured values and dividing by two.
3. The load measurement method for the torque arm of the wind turbine gearbox according to claim 1, characterized in that, The step of determining the vertical loads on the first side and the second side based on the vertical displacement value and a preset displacement stiffness relationship includes: Based on the vertical displacement value and the preset displacement stiffness relationship, the stiffness value of the elastic support of the torsion arm is obtained. The vertical loads on the first and second sides are determined by multiplying the vertical displacement value by the stiffness value.
4. The load measurement method for the torque arm of the wind turbine gearbox according to claim 1, characterized in that, The method further includes: Obtain the torsional load on the first side and the torsional load on the second side; The vertical load on the first side is combined with the torsional load on the first side to determine the total support load on the first side; The vertical load on the second side is combined with the torsional load on the second side to determine the total support load on the second side.
5. The load measurement method for the torque arm of the wind turbine gearbox according to claim 4, characterized in that, The torsional load on the first side and the torsional load on the second side are opposite in number. The step of obtaining the torsional load on the first side and the torsional load on the second side includes: Obtain the torsional load at the center of the gearbox of the fan; Divide the torsional load at the center of the gearbox by the span of the torque arm to obtain the torsional loads on the first side and the second side, respectively.
6. The method for measuring the load of the torque arm of a wind turbine gearbox according to any one of claims 3 to 5, characterized in that, The elastic support of the torque arm is equipped with a temperature sensor, and the preset displacement stiffness relationship includes multiple displacement stiffness relationships corresponding to different temperature ranges. Based on the vertical displacement value and the preset displacement stiffness relationship, the stiffness value of the elastic support of the torsion arm is obtained, including: Obtain the current temperature of the elastic support; Based on the current temperature, select the corresponding target displacement stiffness relationship from the plurality of displacement stiffness relationships; The stiffness value of the elastic support of the torsion arm is obtained based on the relationship between the vertical displacement value and the target displacement stiffness.
7. The method for measuring the load of the torque arm of a wind turbine gearbox according to any one of claims 1 to 5, characterized in that, After determining the vertical loads on the first side and the second side, the method further includes: The vertical loads on the first and second sides are compared with a preset load threshold. When the vertical load on the first side or the second side exceeds the load threshold, a control command is sent to the main control system of the wind turbine to reduce the deformation of the wind turbine's transmission chain.
8. The method for measuring the load of the torque arm of a wind turbine gearbox according to any one of claims 1 to 5, characterized in that, The number of the first displacement sensors is at least two, and the number of the second displacement sensors is at least two. The step of acquiring the first measurement value of the first displacement sensor and the second measurement value of the second displacement sensor includes: Acquire measurement data from at least two of the first displacement sensors and perform fusion processing to obtain the first measurement value; The measurement data from at least two of the second displacement sensors are acquired and fused to obtain the second measurement value.
9. An electronic device, characterized in that, include: At least one processor; and a memory communicatively connected to the at least one processor; The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the load measurement method for the torque arm of the wind turbine gearbox as described in any one of claims 1 to 8.
10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the load measurement method for the torque arm of the wind turbine gearbox as described in any one of claims 1 to 8.