The Dynamics Analysis And Optimization Design Of Centrifugal Electric Spindle

In view of the high speed rotating centrifugal spinning spindle,the vibration causedby small imbalance of adhesive long filar silk ingot in motion will inevitably cause acertain amount of damage to electric spindle,shorten service life and affect workefficiency.How to obtain dynamic characteristics of the electric spindle system throughcomprehensive analysis,evaluate its fatigue life and explore the research methods ofdynamic analysis and calculation,all these work will have the positive significance to putforward reasonable improvement program for optimization design of the follow-up andpromote the development of electric spindle.This paper focuses on the problems that the service life of the electric spindlesystem is low,while the failure rate is high,therefore,the comprehensive dynamicanalysis for high speed rotating centrifugal spinning electric spindle system wascompleted on the basis of the theory of multi-body kinematics and the coupleddynamics and combining with computer imitation system simulation technology, afterthat, the dynamic information,such as free vibration and forced vibration responsecharacteristics, the load characteristic of system structure were obtained,thensummarize the root cause of the fault exist in electric spindle. Further,its fatigue life wasestimated based on the correction algorithm of bearing,and it is also the fault cycle ofelectric spindle.On the basis of maintaining the advantages of existing electric spindle,regarding thepromotion of system speed and the extension of fatigue life as the main researchgoals.A new damping vibration gyro metacentric type centrifugal spinning spindle wasresearched and developed by adapting the damping buffer damping technology,highspeed gyro stable heart technology and labyrinth centrifugal seal technology to make thenew electric spindle have the performance of high speed, high efficiency,low cost,low energy consumption and low malfunction.On the basis of dynamics analysis for traditional electric spindle,the rigid-flexiblecoupling model was established for new electric spindle,and the system dynamics analysiswas finished under the influence of gyroscopic effect and damping shockabsorption,then,calculate the fatigue life of new electric spindle through comparative analysisand parameter optimization.By contrasting that dynamic characteristics, fatigue life andperformance indicators between new and traditional electric spindle to verify the reliabilityand rationality on structure improvement based on the data and conclusions.This article’s research results not only provide reliable analysis method to the research ofthe electric spindle,but also lay a solid foundation for the trial production and performancetest experiment of new electric spindle prototype.Meanwhile, this topic research has beenauthorized national utility model patent<<Damping Vibration Reduction and Flexible DriveElectric Spindle Centrifuge>>(patent authorized number: ZL201320240865.6),and has beenaccepted national invention patent<<A New Damping Suspension Metacentric Electric IngotCentrifuge>>(patent accept number:201310163233)...