Study On The Static And Dynamic Characteristics Analysis And CAD Of The High Speed Bearing-Spindle System

The analysis of dynamics characteristic of shaft rotor in high spindles is one of the important contents that directly decide the designing function of shaft. The dynamic characteristics have immediate effect on the manufacturing precision and efficiency, the lives of bearings, as well as working of the key components. As to the high speed of electric spindle system, the angle-contact bearings are usually applied to supporting the shafts. Because the supporting stiffness of rolling bearing is non-linear, especially under the circumstances of high speed and ultrahigh speed, the internal working status is so complicated that it is not regarded as routine linear support and ordinary non-linear support. Centrifugal effect of the rolling bearing increase the factors of influencing the supporting stiffness. The paper analyses the performance of shaft and meanwhile it expatiates on the methods of working parameters of each support under the high speed. In the dissertation, with building the analysis model of rolling bearing, the supporting stiffness matrix is added into the whole stiffness matrix of shaft and the dynamics characteristic of shaft rotor and working parameters of each bearing is calculated with finite element theory. The calculation has important consulting meaning to design of electric spindles. Based on the analysis, the software of the static and dynamic characteristics analysis of the high speed bearing-spindle system is worked out and the result of calculation is tested by experiment. The software has important consulting meaning to the design of high speed electric main shafts.