| Offshore wind turbines due to their own large size,heavy weight,offshore installation environment and other factors,making the installation of wind turbines and the foundation platform is difficult,time-consuming,high operating costs.To this end,for the installation of offshore wind turbines difficult problem,a new type of offshore wind turbine large connector designed to replace the current common bolt flange connection between the wind turbine tower and the foundation platform to achieve a fast connection,easy to operate the installation of offshore wind turbines,the main research work is as follows.(1)For the Bohai Sea power generation of 5MW,the fan tower diameter of 6meters offshore wind turbine connection problem,the first proposed a reliance on the fan’s own gravity to complete the tower and the foundation platform locking sliding locking mechanism,through the synchronous hydraulic cylinder control fan lowering at the same time to complete the locking operation,locking principle for the internal locking block of vertical movement through the role of the ramp into the external locking block of horizontal movement,movement The locking principle is to convert the vertical movement of the internal locking block into the horizontal movement of the external locking block by the action of the ramp,and then the external locking block will be clamped when it is in position.The designed connector can greatly reduce the difficulty of offshore wind turbine installation and save the time of offshore installation.(2)Considering the wind load,wave load,current load and eccentric load,the maximum bending moment of the connector is 66682 k N ·m and the maximum tensile force of the single locking mechanism is 2711 k N.Accordingly,the mechanical analysis and engineering design of the key components of the connector,the locking mechanism and the positioning mechanism,were carried out to obtain the structural parameters of the key components of the connector.(3)ABAQUS finite element software is applied to simulate the simplified model of the large offshore wind turbine connector to verify that the connector components meet the strength requirements under installation and working conditions.Through the analysis of the stress variation law of each key component,the optimization direction of the connector structure is proposed,and the overall mass of the locking device is reduced by 35.2% after optimization,and the optimal tilt angle of the pressure plate in the locking mechanism is obtained as 48°.(4)The hydraulic synchronization circuit of the connector is selected and designed,and the synchronization motion of the hydraulic cylinder is controlled by applying the diverter collector valve element,and the components in the hydraulic system are calculated and selected.The synchronization simulation of the hydraulic system is completed by AMESim software,and the maximum displacement synchronization error of the hydraulic cylinder is 0.804 mm,which can ensure the smooth locking of the locking mechanism. |
