Design And Simulation Analysis Of New Automatic Vertical Conveying And Sorting Equipment

With the development of logistics technology,modern hospitals have begun to use vertical conveying & sorting equipment(VCSE)to deliver and sort the various types of medical items in high-rise buildings.However,the existing VCSEs has the defects of complicated structure,unreasonable transmission mode,low sorting & conveying efficiency,poor stability,low versatility and low space utilization rate that it has been unable to meet the requirements of high-efficiency,smoothness,and simplicity of vertical sorting.So it is necessary to develop a new type of VCSE to compensate for these shortcomings.After fully researching the demand of domestic hospitals for VCSE,the whole structure of a new VCSE is designed in this paper,and the static and dynamic characteristics of the VCSE are also analyzed by means of finite element analysis and dynamics simulation.In addition,the equipment structure was optimized to improve the sorting efficiency and the smoothness,enhance versatility,reduce costs and other purposes.The main contents of this paper are as follows:1)Aiming at the shortcomings of existing VCSE,the design scheme of a new VCSE was put forward.The form of standardized framework module was adopted in this design to enhance the versatility of the equipment through the increase or decrease of the framework.Moreover,the use of a single chain and 4 sprockets form of transmission module simplifies the structure of the device,saving space resources and increasing the sorting speed to 0.8 ~ 1.0m/s.The structure also contains a pendulum rail-type horizontal load-bearing device,thereby enhancing the smooth transport performance of equipment.2)With ANSYS/Workbench finite element software,the static characteristics of the fuselage and key components of the VSE were simulated,and the stress and strain of the VSE were analyzed under dangerous conditions.The result shows that,the locations of contact between the track and the horizontal bearing devices are stress concentration areas.In these areas,the maximum stress is 213.8MPa and the maximum strain is 0.34 mm,which can meet the safety requirements of the equipment.The lightweight design of the horizontal bearing device can reduce the mass by 21.2%,and reduce the maximum equivalent stress of the fuselage by 14%,so as to optimize the load distribution of the fuselage and improve the safety of equipment.3)The virtual prototype of the equipment is established based on ADAMS software.The dynamic characteristics such as displacement,velocity,acceleration of the bearing device were simulated.It can be seen that,the new VCSE can run stably at the design speed,but when the equipment starts or the bearing device moves into the next direction track,the velocity and acceleration will change abruptly,which will have a great impact on the equipment.As can be found after replacing the rigid connecting rod with a flexible one that the flexible connecting rod can reduce the impact of equipment operation,and the stress is also in a low level during the running process,effectively improving the equipment stability and reliability.