Comprehensive control method for ovality and coaxiality of barrel of large offshore wind power generation equipment

Abstract

The invention discloses a comprehensive control method for ovality and coaxiality of a large offshore wind power generation equipment cylinder, which comprises the following steps of: determining the circumferential coordinate and the longitudinal section position of the cylinder by adopting a jig frame measurement model, accurately measuring the central position coordinate of each measurement section through a coordinate measuring machine and a laser tracker, and calculating the eccentric distance; and calculating the ellipticity compensation processing amount and performing compensation processing. A laser tracker is adopted to detect the measured cross section of the measured cylinder, and whether the ellipticity error of the measured cylinder is qualified or not is judged by calculating the ellipticity and the coaxiality of the compensated measured coordinates. And if not, measurement and compensation are carried out again until the ovality and the coaxiality of the whole cylinder meet the design requirements. According to the method, the complete process from measurement, deviation calculation, compensation machining to re-detection is covered, errors are gradually reduced through multiple times of iterative measurement and compensation until the design requirement is met, the overall performance and reliability of the wind power generation equipment are improved, and the geometric shape of the barrel is considered in calculation of the compensation machining amount.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation equipment, in particular to a comprehensive control method for the ovality and coaxiality of a cylinder of a large offshore wind power generation equipment. Background Art

[0002] In recent years, with the increase of global energy demand and the increasingly serious environmental problems, wind power generation has developed rapidly as a clean and renewable energy form. In particular, offshore wind power has a broad prospect for development in the future because its energy efficiency is much higher than that of land wind farms, it is not restricted by land, and has less impact on landscape, noise and electromagnetic waves.

[0003] As the basic supporting structure of wind turbines, the quality and stability of wind turbine towers are crucial to the operation of the entire wind power generation system. In offshore wind power equipment, the control of tower ellipticity and coaxiality is a key difficulty in the manufacturing and assembly process. Ellipticity refers to the degree to which the cross section of the tower is close to an ellipse, while coaxiality refers to the degree of overlap of the center lines of each section of the tower in the vertical direction. The precise control of these two parameters directly affects the strength and stability of the tower, and thus affects the operating efficiency and safety of the wind turbine.

[0004] Existing technologies may lack a complete process from measurement, calculation of deviation, compensation processing to re-inspection. Some steps may be ignored or simplified, resulting in the inability to fully control the ovality and coaxiality of the cylinder. The lack of a systematic control process may lead to the accumulation and amplification of errors, making the performance of the final product unable to meet the design requirements.

[0005] Existing technologies may not be able to perform effective multiple iterations of measurement and compensation. Due to the lack of high-precision measurement equipment and accurate compensation strategies, the effect of each measurement and compensation may be limited, and the error cannot be gradually reduced, resulting in the cylinder's ovality and coaxiality errors cannot always be reduced to within the design requirements, affecting the overall performance and reliability of wind power equipment. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a comprehensive control method for the ovality and coaxiality of the cylinder of large-scale offshore wind power generation equipment.

[0007] In order to solve the above problems, the technical solution of the present invention comprises the following steps: S1. Use the tire frame measurement model to determine the measurement position of the cylinder circumferential coordinates and the longitudinal section position, and design the measurement section according to the measurement position; S2. Arrange a measurement coordinate system at each measurement section, and determine the center position of the measurement section to arrange a fixed base; S3, measuring the coordinates of the center position of each measuring section by a coordinate measuring machine and a laser tracker; S4. Determine the deviation of the center position of each measuring section according to the measurement data and calculate the eccentricity distance; S5, calculating the ellipticity compensation processing amount of the area near the center of the measuring section on the measured cylinder, and performing compensation processing; S6. Use a laser tracker to detect the measured cross section of the measured cylinder again and obtain the measured coordinates after compensation; S7, calculating the ovality and coaxiality of the cylinder after compensation by measuring the coordinates after compensation, and judging whether the ovality error of the measured cylinder is qualified; S8. If the measured cylinder ovality is qualified, the ovality of the cylinder section below the measured section is measured; if it is unqualified, the measured section is measured and compensated again, and the ovality is tested again; S9. Repeat steps S1 to S8 until the ovality and coaxiality of the entire cylinder meet the design requirements.

[0008] Furthermore, the measurement sections in step S2 include a YOZ plane measurement section, an XOY plane measurement section and an XOZ plane measurement section, the center lines of the measurement sections are perpendicular to each other, and the measurement sections are used to measure the circumferential coordinates and longitudinal section position coordinates of the cylinder.

[0009] Furthermore, in step S4, a laser tracker is used to measure the coordinates of the center position of each measurement section, and the eccentric distance of the center position of the measurement section is calculated based on the measurement data.

[0010] Furthermore, in step S6, the laser tracker is used to measure the coordinates of the measuring points in the vicinity of the compensated measuring cross section of the cylinder to evaluate the effect of the compensation processing.

[0011] Furthermore, if the ovality error of the measured cylinder exceeds the allowable range, the correction method of adjusting the coordinates of the center position of the measuring section and performing compensation processing again are performed until the ovality and coaxiality of the measured cylinder meet the design requirements.

[0012] Furthermore, the tire frame arrangement in step S1 includes a measuring tire frame and a positioning tire frame, the tire frames are welded by steel sections, and two tire frames are arranged on the circumferential surface of the cylinder in a circumferentially spaced distribution manner.

[0013] Furthermore, in the step S3, the coordinate position of the fixed base for measuring the center position of the section is the same as the origin of the coordinates of the center position of the section being measured, and a measurement coordinate system is established through the fixed base. The coordinate measuring machine and the laser tracker are fixed on the tire frame, and the coordinate measuring machine and the laser tracker are used to measure the coordinates of the center position of the section being measured.

[0014] Furthermore, the calculation method of the ellipticity compensation processing amount in step S5 takes into account the eccentric distance of the center position of the measuring section and the geometric shape of the cylinder, and the ellipticity of the cylinder meets the design requirements through compensation processing.

[0015] Furthermore, in step S7, the ellipticity and coaxiality of the measured coordinates after compensation are calculated to determine whether the ellipticity error of the measured cylinder is qualified. If it is unqualified, re-measurement and compensation are performed.

[0016] The advantages of the present invention compared with the prior art are: The present invention provides a comprehensive control method for the ovality and coaxiality of a cylinder of a large offshore wind power generation equipment. By adopting a tire frame measurement model and high-precision measuring equipment such as a coordinate measuring machine and a laser tracker, the circumferential coordinates and longitudinal section position of the cylinder can be accurately determined to ensure the accuracy of the measurement results. The design of a fixed base and a measurement coordinate system helps to reduce measurement errors and improve measurement accuracy. The present invention provides a comprehensive control method for the ovality and coaxiality of a cylinder of a large offshore wind power generation equipment. The method covers a complete process from measurement, calculation of deviation, compensation processing to re-testing, and can comprehensively control the ovality and coaxiality of the cylinder. Through multiple iterations of measurement and compensation, the error can be gradually reduced until the design requirements are met. The present invention provides a comprehensive control method for the ovality and coaxiality of the cylinder of large-scale offshore wind power generation equipment. The method calculates the compensation processing amount by taking into account the eccentric distance of the center position of the measuring section and the geometric shape of the cylinder, making the compensation processing more accurate and efficient. The flexible compensation strategy can be adjusted in real time according to the measurement results to ensure the processing effect. DETAILED DESCRIPTION

[0017] The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all 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.

[0019] A comprehensive control method for the ovality and coaxiality of a cylinder of a large offshore wind power generation equipment comprises the following steps: S1. Use the tire frame measurement model to determine the measurement position of the cylinder circumferential coordinates and the longitudinal section position, and design the measurement section according to the measurement position; S2. Arrange a measurement coordinate system at each measurement section, and determine the center position of the measurement section to arrange a fixed base; S3, measuring the coordinates of the center position of each measuring section by a coordinate measuring machine and a laser tracker; S4. Determine the deviation of the center position of each measuring section according to the measurement data and calculate the eccentricity distance; S5, calculating the ellipticity compensation processing amount of the area near the center of the measuring section on the measured cylinder, and performing compensation processing; S6. Use a laser tracker to detect the measured cross section of the measured cylinder again and obtain the measured coordinates after compensation; S7, calculating the ovality and coaxiality of the cylinder after compensation by measuring the coordinates after compensation, and judging whether the ovality error of the measured cylinder is qualified; S8. If the measured cylinder ovality is qualified, the ovality of the cylinder section below the measured section is measured; if it is unqualified, the measured section is measured and compensated again, and the ovality is tested again; S9. Repeat steps S1 to S8 until the ovality and coaxiality of the entire cylinder meet the design requirements.

[0020] Furthermore, the tire frame arrangement in step S1 includes a measuring tire frame and a positioning tire frame, the tire frame is welded by steel sections, and the two tire frames are arranged on the circumferential surface of the cylinder in a circumferentially spaced distribution manner.

[0021] Furthermore, the measurement sections in step S2 include a YOZ plane measurement section, an XOY plane measurement section and an XOZ plane measurement section, the center lines of the measurement sections are perpendicular to each other, and the measurement sections are used to measure the circumferential coordinates and longitudinal section position coordinates of the cylinder.

[0022] Furthermore, in step S3, the coordinate position of the fixed base for measuring the center position of the section is the same as the origin of the coordinates of the center position of the section being measured, and a measurement coordinate system is established by fixing the base. The coordinate measuring machine and the laser tracker are fixed on the tire frame, and the coordinate measuring machine and the laser tracker are used to measure the coordinates of the center position of the section being measured.

[0023] Furthermore, in step S4, a laser tracker is used to measure the coordinates of the center position of each measurement section, and the eccentric distance of the center position of the measurement section is calculated based on the measurement data.

[0024] Furthermore, the calculation method of the ellipticity compensation processing amount in step S5 takes into account the eccentric distance of the center position of the measuring section and the geometric shape of the cylinder, and the ellipticity of the cylinder meets the design requirements through compensation processing.

[0025] Furthermore, in step S6, the laser tracker is used to measure the coordinates of the measuring points in the vicinity of the compensated measuring cross section of the cylinder to evaluate the effect of the compensation processing.

[0026] Furthermore, in step S7, the ellipticity and coaxiality of the measured coordinates after compensation are calculated to determine whether the ellipticity error of the measured cylinder is qualified. If it is unqualified, re-measurement and compensation are performed.

[0027] Furthermore, if the ovality error of the measured cylinder exceeds the allowable range, the correction method of adjusting the coordinates of the center position of the measuring section and performing compensation processing again are performed until the ovality and coaxiality of the measured cylinder meet the design requirements.

[0028] The specific operation content is to use a measuring tire frame and a positioning tire frame. The tire frame is welded with steel. The two tire frames are arranged on the circumferential surface of the steel shell in a circumferential spacing distribution mode to ensure the uniformity and accuracy of the measurement. The tire frame measurement model is used to determine the measurement position of the circumferential coordinates and longitudinal section position of the steel shell. The measurement section is designed according to the measurement position to ensure that each measurement section can cover the key parts of the steel shell.

[0029] A measurement coordinate system is arranged in each measurement section, with the three-dimensional coordinate origin of the center of the measurement section as point O, the XOY plane of the measurement section as the XOY plane, the YOZ plane of the measurement section as the YOZ plane, and the XOZ plane of the measurement section as the XOZ plane. A fixed base is arranged in the center of the measurement section. The coordinate position of the fixed base is the same as the coordinate origin point O, and the measurement coordinate system is established through the fixed base.

[0030] The coordinate measuring machine and laser tracker are used to measure the coordinates of the coordinate origin O at the YOZ, XOY and XOZ measurement sections. The coordinate measuring machine and laser tracker are fixed on the tire frame to ensure the stability and accuracy of the measurement.

[0031] Based on the measurement data from step 3, determine the deviation of the origin O measured at the three measurement sections YOZ, XOY and XOZ.

[0032] Calculate the eccentric distance. The calculation formula of the eccentric distance is as follows: in , and They are the center radius of the measurement section of the coordinate origin O at YOZ, XOY and XOZ respectively. Measurement of the origin O at YOZ, XOY and XOZ measurement sections coordinate.

[0033] The ellipticity compensation processing amount is calculated based on the eccentric distance. The calculation formula for the compensation processing amount is as follows: in, is the compensation coefficient, , are the arc length and distance of the Y-axis and X-axis sections respectively; a, b, c are the eccentric distances of the measurement origin O at the YOZ, XOY and XOZ measurement sections.

[0034] According to the calculated ovality compensation processing amount, the steel shell is compensated to ensure that the ovality of the steel shell meets the design requirements.

[0035] The laser tracker is used to measure the steel shell section again, and the coordinates are measured after compensation. The measuring point is used to measure the ovality of the steel shell section at the measuring section. The coordinates of the measuring point are as follows: (Ya,Zb),(Xc,Yd),(Xe,Yf),(Xg,Zh),(Ij,Zk),(Il,Zm),(In,Io),(Ip,Iq),(Ir,I).

[0036] The compensated ovality and coaxiality of the steel shell are calculated by measuring the coordinates after compensation to determine whether the ovality error of the measured steel shell is qualified. The calculation formula of ovality is as follows:

[0037] Where a and b are the lengths of the major and minor axes of the measured section, respectively.

[0038] If the measured steel shell ovality is qualified, the ovality measurement of the next section of the steel shell will be carried out; if it is unqualified, the measurement coordinate origin O of the measurement section will be measured again, the measured steel shell will be compensated again and the ovality of the measured steel shell will be tested again.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0041] The present invention and its implementation methods are described above, and such description is not restrictive, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design structures and embodiments similar to the technical solution without creativity, which should all fall within the protection scope of the present invention.

Claims

1. A comprehensive control method for the ovality and coaxiality of a large offshore wind power generation equipment cylinder, characterized in that: The following steps are involved: S1. Use the tire frame measurement model to determine the measurement position of the cylinder circumferential coordinates and the longitudinal section position, and design the measurement section according to the measurement position; S2. Arrange a measurement coordinate system at each measurement section, and determine the center position of the measurement section to arrange a fixed base; S3, measuring the coordinates of the center position of each measuring section by a coordinate measuring machine and a laser tracker; S4. Determine the deviation of the center position of each measuring section according to the measurement data and calculate the eccentricity distance; S5, calculating the ellipticity compensation processing amount of the area near the center of the measuring section on the measured cylinder, and performing compensation processing; S6. Use a laser tracker to detect the measured cross section of the measured cylinder again and obtain the measured coordinates after compensation; S7, calculating the ovality and coaxiality of the cylinder after compensation by measuring the coordinates after compensation, and judging whether the ovality error of the measured cylinder is qualified; S8. If the measured cylinder ovality is qualified, the ovality of the cylinder in the next section of the measurement section is measured; if it is unqualified, the measurement section is measured and compensated again, and the ovality is tested again; S9. Repeat steps S1 to S8 until the ovality and coaxiality of the entire cylinder meet the design requirements.

2. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 1 is characterized in that: The tire frame arrangement in step S1 includes a measuring tire frame and a positioning tire frame. The tire frames are welded by steel sections, and two tire frames are arranged on the circumferential surface of the cylinder in a circumferentially spaced distribution manner.

3. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 2 is characterized in that: The measurement sections in step S2 include a YOZ plane measurement section, an XOY plane measurement section and an XOZ plane measurement section, the center lines of the measurement sections are perpendicular to each other, and the measurement sections are used to measure the circumferential coordinates and longitudinal section position coordinates of the cylinder.

4. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 2 is characterized in that: In the step S3, the coordinate position of the fixed base of the center position of the measuring section is the same as the origin of the coordinates of the center position of the measuring section. The measuring coordinate system is established by the fixed base. The coordinate measuring machine and the laser tracker are fixed on the tire frame. The coordinate measuring machine and the laser tracker are used to measure the coordinates of the center position of the measuring section.

5. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 2, characterized in that: In step S4, a laser tracker is used to measure the coordinates of the center position of each measurement section, and the eccentric distance of the center position of the measurement section is calculated based on the measurement data.

6. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 1, characterized in that: The calculation method of the ellipticity compensation processing amount in step S5 takes into account the eccentric distance of the center position of the measuring section and the geometric shape of the cylinder, and the ellipticity of the cylinder meets the design requirements through compensation processing.

7. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 1, characterized in that: In step S6, the laser tracker is used to measure the coordinates of the measuring points in the vicinity of the compensated measuring cross section of the cylinder to evaluate the effect of the compensation processing.

8. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 1, characterized in that: In step S7, the ellipticity and coaxiality of the measured coordinates after compensation are calculated to determine whether the ellipticity error of the measured cylinder is qualified. If it is unqualified, re-measurement and compensation are performed.

9. The method for comprehensive control of cylinder ellipticity and coaxiality of large offshore wind power generation equipment according to claim 8, characterized in that: If the ovality error of the measured cylinder exceeds the allowable range, the correction method of adjusting the coordinates of the center position of the measuring section and performing compensation processing again are performed until the ovality and coaxiality of the measured cylinder meet the design requirements.

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