A method for arranging a wind turbine tower flange connection bolt

Abstract

The application provides a kind of wind turbine tower flange connecting bolt arrangement method, comprising the following steps: step 1, respectively on tower, tower flange and connecting bolt are modeled, respectively obtain tower model, tower flange model and bolt model;Step 2, according to the obtained tower model, tower flange model and bolt model simulate wind turbine operation, obtain the initial reference position of each connecting bolt;Step 3, collect each connecting bolt at initial reference position, and wind turbine is at the highest wind, the load data corresponding to each connecting bolt;Calculate the limit load corresponding to each connecting bolt;Step 4, according to the load data of each connecting bolt obtained, adjust the limit load corresponding to each connecting bolt;Further, according to initial reference position and adjusted limit load, each connecting bolt is arranged;The application can prevent uneven stress of connecting bolt, premature damage of load large connecting bolt, improve the safety of wind turbine.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind turbine tower, in particular to a kind of wind turbine tower flange connecting bolt arrangement method. BACKGROUND

[0002] Wind turbine includes the tower of supporting generator unit, power equipment and blade, and power equipment includes battery charger controller, inverter, unloader, grid-connected controller, battery pack etc., and power equipment and blade are fixed on the tower by flange and connecting bolt.

[0003] Due to the large volume of wind turbine, if the stress and force of each connecting component cannot be accurately calculated, the design in production will affect the stability of equipment connection. SUMMARY

[0004] The present application provides a kind of wind turbine tower flange connecting bolt arrangement method, solve the above-mentioned deficiencies existing in prior art.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0006] The present application provides a kind of wind turbine tower flange connecting bolt arrangement method, comprising the following steps:

[0007] Step 1, respectively, on the tower, tower flange and connecting bolt are modeled, respectively, to obtain tower model, tower flange model and bolt model;

[0008] Step 2, according to the obtained tower model, tower flange model and bolt model, simulate wind turbine operation, obtain the initial reference position of each connecting bolt;

[0009] Step 3, collect each connecting bolt at initial reference position, and wind turbine is at the highest wind, each connecting bolt corresponding load data;

[0010] Calculate the limit load corresponding to each connecting bolt;

[0011] Step 4, according to the load data of each connecting bolt, adjust the limit load corresponding to each connecting bolt; and then according to the initial reference position and adjusted limit load, each connecting bolt is arranged.

[0012] Preferably, in step 1, ANSYS software is used to model the tower, tower flange and connecting bolt respectively.

[0013] Preferably, in step 2, according to the obtained tower model, tower flange model and bolt model, simulate wind turbine operation, obtain the initial reference position of each connecting bolt, the specific method is:

[0014] Set the initial position of each connecting bolt, and collect the load corresponding to each connecting bolt at the initial position;

[0015] Adjust the position of each connecting bolt until the total angle is obtained, and a plurality of groups of load data are obtained;

[0016] Calculate the load difference corresponding to each group of load data to obtain a plurality of load differences;

[0017] Select the minimum load difference value from the plurality of load difference values, and take the connecting bolt position corresponding to the minimum load difference value as the initial reference position.

[0018] Preferably, the load difference corresponding to each group of load data is calculated to obtain a plurality of load differences, and the specific method is:

[0019] Select the maximum load value and the minimum load value from each group of load data, and calculate the load difference corresponding to the group of load data according to the obtained maximum load value and the minimum load value.

[0020] Preferably, the specific method of adjusting the position of each connecting bolt until the total angle is:

[0021] Adjust each connecting bolt by 0.5° deflection.

[0022] Preferably, the total angle is calculated by the following formula:

[0023]

[0024] Wherein, N is the number of connecting bolts; X is the total angle.

[0025] Preferably, the set position is the mounting hole adjacent to the initial position of the connecting bolt.

[0026] Preferably, in step 3, the limit load corresponding to each connecting bolt is calculated by the finite element analysis method.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] The arrangement method of the connecting bolt of the flange of the wind turbine tower provided by the present application continuously adjusts the position of the connecting bolt according to the load applied by the flange in each direction when the wind turbine is working until the point with the most uniform stress is found, thereby preventing uneven stress of the connecting bolt and premature damage of the connecting bolt with large load, and improving the safety of the wind turbine;

[0029] By measuring the connecting bolt load data under the highest wind force, the ultimate load of the connecting bolt under high temperature and low temperature is calculated, so that the strength of each orientation connecting bolt is processed, so that the ultimate load under the two temperatures is greater than the load data, so that through accurate calculation and accurate design, the service life of the connecting bolt is longer and the safety is better. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0031] EMBODIMENT

[0032] The present application provides a kind of arrangement method of wind turbine tower flange connecting bolt, comprising the following steps:

[0033] S1, modeling is carried out on tower, tower flange and connecting bolt in ANSYS software respectively;

[0034] S2, simulate wind turbine operation, set the initial position of each connecting bolt, and collect the load data of each connecting bolt under the initial position;

[0035] S3, rotate the connecting bolt around the flange, and adjust the position of each connecting bolt at 0.5° deflection angle until the total angle;Obtain multiple groups of load data;

[0036] Select the maximum load value and the minimum load value from each group of load data, and calculate the load difference corresponding to the group of load data according to the obtained maximum load value and minimum load value;

[0037] Select the minimum load difference value from multiple load difference values, and take the connecting bolt position corresponding to the minimum load difference value as the initial reference position;

[0038] S4, set the connecting bolt at the initial reference position, and collect the load data M of the connecting bolt under the highest wind force working environment of wind turbine in the set time period in the measured wind field again;

[0039] S5, calculate the ultimate load that each orientation connecting bolt can withstand;

[0040] S6, adjust the ultimate load according to the load data M of the connecting bolt;Further, arrange each connecting bolt according to the initial reference position and the adjusted ultimate load.

[0041] Specifically:

[0042] In S3, the total angle of the connecting bolt rotation is X:

[0043]

[0044] Where N is the number of connecting bolts.

[0045] In S5, the limit load of the connecting bolt is obtained according to the finite element analysis method;

[0046] The limit load measurement should be carried out at two temperatures of C1+5 and C2-5:

[0047] C1 is the highest temperature of the implementation place in a year;

[0048] C2 is the lowest temperature of the implementation place in a year.

[0049] By measuring in the environment of the highest temperature plus 5 degrees and the lowest temperature minus 5 degrees, a safety buffer distance is left, which can reduce the influence of errors and environmental mutations on the performance of the connecting bolt.

[0050] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method of arranging bolts for a flange connection of a tower section of a wind turbine, characterized in that, The method comprises the following steps: Step 1, respectively model the tower drum, the tower drum flange and the connecting bolt, and obtain the tower drum model, the tower drum flange model and the bolt model; Step 2, simulate the operation of the wind turbine according to the obtained tower drum model, tower drum flange model and bolt model, and obtain the initial reference position of each connecting bolt; Step 3, collect the load data corresponding to each connecting bolt when the wind turbine is in the highest wind and each connecting bolt is in the initial reference position; Calculate the limit load corresponding to each connecting bolt; Step 4, adjust the limit load corresponding to each connecting bolt according to the obtained load data of each connecting bolt, and then arrange each connecting bolt according to the initial reference position and the adjusted limit load; In step 2, the initial reference position of each connecting bolt is obtained by simulating the operation of the wind turbine according to the obtained tower drum model, tower drum flange model and bolt model, and the specific method is: Set the initial position of each connecting bolt, and collect the load corresponding to each connecting bolt at the initial position; Adjust the position of each connecting bolt until the total angle is obtained, and a plurality of load data is obtained; Calculate the load difference corresponding to each group of load data to obtain a plurality of load differences; Select the minimum load difference value from the plurality of load difference values, and take the connecting bolt position corresponding to the minimum load difference value as the initial reference position.

2. A method of arranging bolts for a flange connection of a tower section of a wind turbine, according to claim 1, characterized in that In step 1, ANSYS software is used to model the tower drum, the tower drum flange and the connecting bolt.

3. A method of arranging bolts for a flange connection of a tower section of a wind turbine, according to claim 1, characterized in that The specific method of calculating the load difference corresponding to each group of load data to obtain a plurality of load differences is: Select the maximum load value and the minimum load value from each group of load data, and calculate the load difference corresponding to the group of load data according to the obtained maximum load value and minimum load value.

4. A method of arranging bolts for a flange connection of a tower section of a wind turbine, according to claim 1, characterized in that The specific method of adjusting the position of each connecting bolt until the total angle is: Adjust the position of each connecting bolt by 0.5°.

5. A method of arranging bolts for a flange connection of a tower section of a wind turbine, according to claim 1, characterized in that The total angle is calculated by the following formula: wherein, is the number of connecting bolts; is the total angle.

6. A method of arranging bolts for a flange connection of a tower section of a wind turbine, according to claim 1, characterized in that The set initial position of each connecting bolt is the mounting hole adjacent to the initial position of the connecting bolt.

7. A method of arranging bolts for a flange connection of a tower section of a wind turbine, according to claim 1, characterized in that In step 3, the limit load corresponding to each connecting bolt is calculated by the finite element analysis method.

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