CAJ | 학술논문

基于有限元方法对碾米机主轴的临界转速进行了研究。根据碾米机主轴系统结构，确定了转子系统的主要组成部分，并采用二维弹簧‐阻尼单元对轴承进行建模。给定0、500、1000、1500和2000 r／min 5种工作转速，对转子动力学进行分析，得到了坎布尔图，从而确定了主轴的临界转速为725 r／min。这意味着当工作转速达到725 r／min附近时，主轴会达到共振状态。因此应当尽量避免主轴在此转速附近工作。如果工作转速超过了此速度，那么在启动时应当尽快通过此转速，以避免较大的振动而引起的零部件的破坏。该方法对于采用有限元方法计算碾米机主轴系统的临界转速有较好的参考作用。
기우유한원방법대년미궤주축적림계전속진행료연구。근거년미궤주축계통결구，학정료전자계통적주요조성부분，병채용이유탄황‐조니단원대축승진행건모。급정0、500、1000、1500화2000 r／min 5충공작전속，대전자동역학진행분석，득도료감포이도，종이학정료주축적림계전속위725 r／min。저의미착당공작전속체도725 r／min부근시，주축회체도공진상태。인차응당진량피면주축재차전속부근공작。여과공작전속초과료차속도，나요재계동시응당진쾌통과차전속，이피면교대적진동이인기적령부건적파배。해방법대우채용유한원방법계산년미궤주축계통적림계전속유교호적삼고작용。
The critical speed of the rice mill spindle were calculated using the finite element method .According to the struc‐ture of rice mill spindle system ,the main components of rotor system was determined ,and the two‐dimensional spring and damping element was used to model the bearing .Given 5 kinds of working speed (0 ,500 ,1 000 and 1 500 and 2 000 r/min) , after the rotor dynamic analysis ,the Campbell diagram was obtained ,thus the critical speed of the spindle was determined as 725 r/min ,which meant that the spindle could reach the resonance state when the speed was 725 r/min .Therefore ,it should be avoided as far as the main axis of the spindle in the vicinity of work .If the speed of the work exceeds this speed ,the speed should be passed as soon as possible ,so that the damage of the parts caused by the vibration could be avoided .The critical speed calculation method for rice mill spindle system using the finite element method had a good reference .