Parameterized Design And Mechanical Characteristics Simulation Research Of GW46 High Voltage Isolating Switch

High-voltage isolation switches are widely used in power grid systems,usage of which is up to 2～4 times that of high-voltage circuit breakers,and it plays a very important role in the power system.But it often fails,and its working condition is closely related to the normal operation of the grid system.The data shows that about 70%of all failures of isolating switches are mechanical failures.However,most of the research on high-voltage isolating switches focuses on electromagnetic and fault diagnosis.There is less research on mechanical characteristics,and mechanical properties need to be further studied.This article takes the GW46 scissors-type high-voltage isolating switch developed and produced by an enterprise of the State Grid as the research object,the research contents are as follows:(1)The product structure and working principle are analyzed,and the structure model of the main knife of the GW46-126 high-voltage isolating switch is established.On this basis,the kinematic calculation formulas of the product’s main knife mechanism,the calculation formulas of the ideal balance spring stiffness,and kinetic formulas are derived.(2)Use Matlab software to numerically analyze the kinematic formulas of the main gate knife system of the high-voltage isolating switch,solve them and output the motion trajectory,angular velocity,and angular acceleration of different rods.In order to facilitate user product development,a parameterized GUI graphical interface is designed,which can be widely used in the GW46 series of high-voltage isolation switches,which is convenient and quick to modify,and is suitable for the development and optimization of the GW46 series of isolation switches.(3)Based on the parameters of parametric design,a product 3D solid model is established in Solidworks 3D modeling software and imported into the dynamic analysis software Adams,The driving torque curve of the opening and closing process of the mechanism was obtained by simulation,and the correctness of the dynamic model was verified by comparison with the test.Based on the simulation,the trajectories and angular velocities of the different rods in the opening and closing process of the mechanism are obtained,which are compared with the results of the numerical analysis by Matlab and mutually verified;the influence factors of the driving torque during the opening and closing process of the mechanism are studied.(4)The finite element analysis of the main gate knife mechanism working in high-temperature and high-cold areas is carried out,and the stress cloud diagram of normal working under normal temperature is output,and the multi-temperature field analysis and research are carried out.Using Abaqus software to simulate the mechanical characteristics of the mechanism in the range of-60℃ to 60℃,the relationship between the clamping force of the dynamic and static contacts of the mechanism and the temperature is obtained,and the simulation results are verified through experiments,and the analysis results are proposed to use the products.Guidance;simulate the up and down movement of the static contact due to wind in the clamped state and give suggestions.(5)Comparing the Matlab discrete particle swarm optimization method and the Adams dynamic optimization method,the opening and closing acceleration and torque of the mechanism are optimized to make the mechanism run more smoothly;the driving torque of the mechanism is optimized based on the Adams dynamics analysis software to improve the performance of the product.