The Design And Dynamics Analysis Of Vertical-Axis Tidal Current Turbine Variable-Pitch

Because of since starting function, higher energy utilization efficiency and stronger abilityto adapt to the waters of the environment etc, vertical-axis tidal current turbine gets muchattention by people. Among them, variable-pitch used to adjust the movement of the blade isone of the key components of the turbine.Based on the angle control principle, a new type variable-pitch of the vertical-axis tidalcurrent turbine combined with the angle control mechanism and double crank six membermechanism is designed in this paper. First, the space position of the control points of the anglecontrol mechanism were solved with plane geometry analysis method. Then the change rule ofthe stem length and the blade angle was deduced with reversal method and the correspondingcomputer programs of kinematics analysis were worked out with MATLAB software. Finally,the vertical-axis tidal current turbine modeling was created based on angle control method tovalidation the feasibility of movement.Then, the fluid dynamic analysis model of the turbine blade is created and the fluiddynamics simulation analysis is done of the turbine blade to get the lord torque of the turbine inthe pulp and maximum eccentric state and the torque of the blade in the biggest deflection angle.In order to obtain the natural vibration characteristic of the turbine blade in the water, thesurface pressure from fluid dynamics simulation analysis is applied to blade for pre-stressedmodal analysis.Finally, the multi-rigid-body dynamics model of the vertical-axis tidal current turbine iscreated. The speed, acceleration of the important components and the stress state of joint areobtained in the process of motion. The research is of important theoretical and practicalsignificance for the design and application of vertical-axis tidal current turbine.