Development Of A Self-locking Wind Power Hydraulic Cylinder

The hydraulic cylinder is the core component of the hydraulic control system of the wind blade,and its performance directly affects the reliability and stability of the whole hydraulic control system.Based on the development of hydraulic cylinder and hydraulic lock at home and abroad,a new type of hydraulic cylinder,a self-locking hydraulic cylinder is designed in this paper.This type of hydraulic cylinder has a power-off self-locking device and a buffer device.By using the innovative design of the structure,the self-locking device of the hydraulic cylinder can realize the reliable locking at any position with the oil cylinder under the load condition,and can guarantee the reliable unlocking in the working process;The buffer device can ensure that the blades of the wind turbine can reduce their load within the prescribed time,which can avoid the damage of the blades.In this paper,the structure of the self-locking wind power hydraulic cylinder is designed and analyzed,and then the performance of the hydraulic cylinder is studied using theoretical analysis,simulation analysis and structural optimization.The specific research contents are as follows:According to the design requirements,the structure design of the self-locking hydraulic cylinder is done at first.The main parameters such as cylinder wall thickness and outer diameter are determined by theoretical calculation,and the strength and stiffness of the structural parameters are checked by finite element method;Based on the analysis of the structural parameters,the design of the piston structure,self-locking device and buffer device of the self locking hydraulic cylinder is completed;The solid model of the self locking wind power hydraulic cylinder is established using the Solid Works software,which can bulid the foundation for the subsequent performance analysis and optimization.Secondly,the performance of self-locking wind power hydraulic cylinder is analyzed in this paper.The deformation of hydraulic cylinder and the stress distribution of each component under the action of extreme axial load(extreme load and extreme load)and radial load are also studied in the paper.Thirdly,analysis and optimization of the structure parameters for the self-locking device are also studied in the paper.The theoretical calculation formula of clamping force is obtained by the analysis of the self-locking device force.And the influence of the structural parameters on the clamping force is analyzed by MATLAB software.The ANSYS Workbench is used to analyze the stiffness and strength of the key parts of the cylinder in order to test its reliability.The ANSYS Workbench simulation is also used to analyze the clamping force and its influencing factors of the self-locking device to verify the reliability of the self-locking device.Finally,the performance of hydraulic buffer device is theoretically studied in the paper.It mainly includes the establishment of the theoretical analysis model,the analysis of the buffer characteristic curve and the theoretical analysis of the influence of the buffer process.The performance of the buffer device is simulated by Fluent software.The pressure changes in the buffer process are observed and the influence of the structural parameters on the cushioning performance is studied.