Structure Design And Finite Element Analysis Of A New Type Of Atomic Fluorescence Spectrometer

With the rapid development of China's economy,the quality of people's life has been improved greatly.However,the pollution problems have highly attracted people's attentions gradually,particularly the pollution of heavy metal.At the same time,it was urged to develop the corresponding detection technology to meet the needs of food safety,geological exploration,water quality monitoring,environmental protection,etc.After many years of research,domestic atomic fluorescence spectroscopy detection technology having developed rapidly,the atomic fluorescence spectrometer from the beginning of single channel to double channels to multi channels nowadays,either the stability or the measurement accuracy has made great progresses.But by investigation and research it was not hard to find that the most majority of atomic fluorescence spectrometers still have drawbacks of large volume and poor intelligence,which can not meet the requirements of multifarious measurement environment to promote social development and has huge limitations.Therefore,the paper designs a studies of a new two channel atomic fluorescence spectrometer.On the basis of atomic fluorescence principle and domestic and abroad research,the paper firstly analyze the composition structures of atomic fluorescence spectrometer and the experimental principles of each composition part,worked out the design scheme and respectively set 3D models of the chassis,light source system,atomization system,instrument cover and gas channel structure through UG 3D software.Then did the simulation research on 3D models and verify the interference condition of assemblies.Secondly,based on ANSYS finite-element the paper did the static finite-element stress analysis of atomic fluorescence spectrometer whole model and parts of critical force-bearing regions.Through analyzing its force-bearing situation,be confirmed whether the designed components and selected materials can meet design requirement.The difference of opening and closing of the solenoid valve would cause the change of the pressure of the argon inlet.Finally,The paper conducted the fluid-structure interaction experiment of argon inlet circuit,by using ANSNY fluid-structure interaction method,to analyze the pressure of each gas channel and pressure variation and to verify the rationality of gas channel structure design and material selection.