Design And Analysis Of Backbone Support Mechanism For Lightweight Reflector

With the development of society,the problem of energy shortage and pollution caused by traditional energy is becoming more and more serious.Reflectors are widely used in convergent solar power generation systems.The surface precision is an important index to ensure the reflector to work effectively.Under the action of gravity and wind load,in order to ensure the accuracy of reflector surface,solid panel and support backbone are often used as the backbone support structure.However,this structure will cause the huge weight,high cost and control difficulties of the whole system,which is not conducive to the popularization and utilization of reflector surface.based on this,this article put forward by the gentle and soft structure of reflector,the reflective surface quality is light,high cost performance,has the good economic value.The light reflecting surface is divided into a circular reflecting surface and a portable reflecting surface.This paper is aimed at the design and analysis of reflector backbone support mechanism.On the premise of satisfying the application requirements of reflective surface,we strive to design a lightweight,compact structure,reliable movement,strong and durable backbone support mechanism.This paper mainly includes the following aspects:Firstly,the global design and analysis are carried out for the annular reflector backbone supporting mechanism,and the key dimensions and important parameters are obtained as the important basis for its structural design.In order to satisfy the premise of solar tracking,the overall scheme of backbone supporting mechanism is determined.With light weight as the target,the reflector surface was optimized.After the reflector surface optimization,the overall backbone support mechanism was further optimized to obtain the optimal size parameters of telescopic rod sleeve.Through the kinematics and dynamic analysis of the backbone supporting mechanism,it is verified that the mechanism has no interference,and the maximum axial force of the three telescopic rods in the course of apparent solar tracking is obtained.Secondly,the structure design and simulation analysis of the three telescopic bar tracking mechanism are carried out.The transmission scheme of three telescopic rods is put forward,and the concrete structure design is carried out around the transmission scheme.The dynamic analysis of the driving rope verifies the feasibility of the transmission scheme,and the statics analysis of the key parts proves the strength reliability of the telescopic rod mechanism.In this paper,two new composite hinge schemes are proposed,and their feasibility is demonstrated from two angles of freedom and range of motion.Then the automatic expansion program design and simulation analysis are carried out for the sheet metal connector.Through the screening and analysis of the joints with different processing techniques and connection modes,the “sheet metal joints and riveting joints”scheme is optimized,and the mathematical model of sheet metal joints is established for this scheme,and the computer automatic expansion program is written according to the mathematical model,and the correctness of the program is verified by paper mold.The design rationality of sheet metal joint is verified by static analysis.Finally,the structure design and simulation analysis of portable reflector backbone support mechanism with different diameters are carried out.The portable reflector backbone support mechanism includes two schemes,among which the support rib molding scheme is suitable for reflectors with a diameter of less than 2 meters,and the cantilever beam molding scheme is suitable for reflectors with a diameter of 2~3.5 meters.Through ANSYS,the deformation analysis of the single radial rib under the two schemes is carried out,and the deformation scheme which is the most consistent with the standard parabola is found through the optimal design.According to the deformation scheme,the concrete structure design of the skeleton support mechanism is carried out,and the rationality of the structure is verified by theoretical analysis and simulation analysis.Through the static analysis,it is verified that the precision of the portable reflector meets the design requirements under the complex environment.The work in this paper is the exploration and refinement of the reflector backbone supporting mechanism,which has certain reference value for expanding the application of lightweight reflector in the field of solar energy.