Kinematics Analysis And Structural Optimization Of Photovoltaic Power Generation Board Sweeper

With the rapid development of the economy and the continuous improvement of people's living standards,the encouragement of the National Environmental Protection Department's new energy policy and the strong support of the State Grid Corporation,the number of enterprises and households that have used solar photovoltaic power generation has grown rapidly in the past five years.In practical applications,solar photovoltaic panels are in direct contact with the natural environment for a long time,dust in the air,pollen,defoliation,bird droppings and yellow sand will all stack on the surface of photovoltaic panels.Therefore,it is necessary to clean the sediment on the surface of the photovoltaic panel periodically.The current mainstream cleaning method is manual cleaning,which is not only in low cleaning efficiency but also labor intensity,hard working conditions and high in cost.A number of research institutions have developed corresponding solar photovoltaic panel cleaning devices to solve the problem of ash deposition on the surface of photovoltaic panels.However,there are still some problems: unsatisfactory cleaning effect,low cleaning efficiency,poor environmental adaptability,and low automation.This paper takes the photovoltaic power generation board sweeping machine independently researched and developed by Hunan University as the research object.The kinematics and dynamics method are used to analyze the characteristics of the virtual prototype model,structural optimization of the cleaning machine is performed to achieve a certain degree of lightweight requirements.The main research work of this paper includes:(1)The analysis of working principle of photovoltaic power generation board sweeper,work planning and establishment of structural model are investigated.According to the structure and layout characteristics of the photovoltaic power generation board,a mechanical structure that meets the functional requirements was designed.The working principle of the sweeper was analyzed,the design scheme was verified to judge whether it can meet the technical requirements.(2)Kinematics analysis of photovoltaic panel cleaning machine is carried out.The virtual prototype analysis software,ADAMS,was used to establish a prototype model of the photovoltaic power generation board sweeper.The startup,constant speed operation and shutdown actions of the sweeping machine were simulated and analyzed during the running process to verify the stability of the running process.(3)Dynamics and static characteristics of photovoltaic power generation board sweeper are analyzed.According to the model of the established virtual prototype,the dynamic analysis of the running process was completed,and it was found that the large impact load was generated inside the sweeping machine whenever the operating mode was switched.Finite element analysis software,HyperWorks,was used to simulate the static characteristics of the sweeper under extreme load conditions,the surface stress distribution of the sweeper was lower than the allowable stress of each component,and the strength and stiffness of the sweeper were showed to meet design requirements.(4)Structural sizes of photovoltaic power generation board sweeper are optimized.The component with the largest stress area on the sweeper was selected as the research object,the optimization model was established by the homogeneous topology method.With the results of the finite element simulation,the structural sizes of the body bracket and the intermediate mounting plate at the maximum stress position on the sweeper were optimized to obtain the thickness of the plate.The optimal value reduced the weight of the sweeping machine by 13.46%,which achieved a certain degree of lightweight requirementsand and had reference significance for the improvement of the subsequent prototype.