Dynamic Characteristics And Structural Optimization Research For Flexible Diaphragm Coupling

Diaphragm coupling is a kind of equipment which connect shaft with shaft or other rotary parts to transmit movements and power,mainly constitute of diaphragm,sleeves,wheels,protective cover and other component parts.Diaphragm coupling is a new high-performance flexible coupling,not only through the elastic deformation of the diaphragm to compensate for radial,axial and angular misalignment conditions between two axes.At the same time,on the transmission system has cushioning and damping effect,and also has a number of advantages as without lubrication,light weight,high reliability and long life.It’s widely used in large-scale chemical equipment,military and other high-power,high-speed fields.As diaphragm coupling structure is complex,The damage of coupling membrane disc caused by the failure will directly affect the normal operation of the transmission system,and even cause serious accidents.Therefore,it has very important application value to research on static analysis,dynamic simulation and structural optimization for the diaphragm coupling.The main research contents in this paper can be summarized as follows:Chapter 1 By analysising the advantages of the diaphragm coupling,introduced the research and application circumstance of the diaphragm coupling in and out of the country,and expressed the methods and main contents to enchancing the performance of the diaphragm coupling in this paper.Chapter 2 Based on the theory of Jeffcott rotor system,studied the whirl phenomena and properties of the elastic support and single-disc bias asymmetric rotor system.Using the lagrange equation and the laws of energy to establish the steady whirl differential equation,at the same time,researching the affects of the isotropic and anisotropic elastic support,cross stiffness,offset,supporting quality,bending stiffness and other factors to critical speed.Chapter 3 Through described the structure and characteristics of diaphragm coupling,to establish a simplified model of diaphragm coupling using the reasonable simplified method.Based on this model,researching the modal characteristics in different loading conditions.As a result,provided a theoretical basis for the diaphragm coupling to operate safely and steadily.Chapter 4 Using the method of the ABAQUS finite element analysis,studied the variation of von mises stress in different loading and bearing conditions.At the same time,obtained the kinetic parameters of come key nodes on different conditions taking mplicit dynamics analysis module.Chapter 5 Based on various structure optimization method,according to the structure of diaphragm,density method was used for its topology optimization.Firstly finite element model was built for diaphragm topology optimization.Secondly static strength analysis was done,topology optimization was continued.At last,in contrast to different models,gained the optimized diaphragm structure.Chapter 6 Made the conclusions.