Optimization Design Of Critical Components In Large-megawatt Wind Turbine Brake

With the serious problem of energy crisis and environmental deterioration,power supply from wind energy has been widely used.As critical components of the wind generator braking system,brake disc and brake clamp have significant influence on brake performance.This paper optimizing the structural of large-megawatt wind turbine brake clamp and brake disc,building a dynamic virtual prototype system level wind power brake after optimization,and then analyzing the brake capability with different braking parameters through the virtual prototype.The specific research contents and results are as follows:(1)Analyzing the forces and the constraints conditions of the brake clamp of large-megawatt wind turbine brake in actual working condition,established the finite element model of brake clamp,set up the mathematical model of topology optimization design of the brake clamp structure with the minimum of the maximum strain energy produced under the actual condition of the brake forceps to optimize the static stiffness of the brake clamp,the maximum equivalent stress of the braking forceps was reduced by 47.59%and the maximum deformation was 49.68%.(2)Finite element technique is essentially a continuous entity will again after discretization in the space analysis of the technology,inspired,this paper presents a method for static transformation of equivalent dynamic mobile load to replace the force and constraint of brake disc in dynamic condition.The topology optimization design of the brake disk structure is carried out with the maximum strain energy minimum,and the weight of the brake disc was reduced by 57.95%.(3)In the real braking process,the brake clamp and the brake disc are affected by complex working conditions.Building large-megawatt wind turbine brake dynamics virtual prototype model.By comparison,the maximum equivalent stress value of the reconstructed brake disc was reduced by 78.24%.Then based on the comparison and analysis of the braking efficiency of brake under different braking force,dynamic friction coefficient and initial speed,the paper gives some reasonable suggestions on the selection of three braking parameters.This paper provides a feasible method that lightweight design of large-megawatt wind disc brake calipers and the dynamic performance optimization of the brake disc.At the same time,this kind of structure improvement method with optimization-reconstitution-verification has also been enriched and developed,and provides important theoretical basis and application value for the study of similar continuum structure system topological optimization design.