卧式振动离心机的动力学分析与响应测试

Kinetics analysis and response test of horizontal vibration centrifuge

通过建立卧式振动离心机的动力学模型,对离心机的幅频特性进行了研究。对卧式振动离心机的前10阶振动模态进行了有限元仿真,通过实验测试得到了筛篮的振动模态及稳态响应加速度幅值。结果表明:卧式振动离心机的第5阶固有频率为21.98Hz,筛篮的第1阶固有频率为20.57Hz,分别比振动电机的振动频率低9.06%和14.89%;空载时筛篮的稳态响应加速度幅值为56.2m/s2,当加工物料质量为290kg时,筛篮的稳态响应加速度幅值为58.6m/s2,其吸振效果比空载时提高了4.27%。

Amplitude-frequency characteristics of horizontal vibration centrifuge was studied by establishing kinetics model of horizontal vibration centrifuge.Finite element simulation of the first ten steps of vibration mode of horizontal vibration centrifuge was carried out.Vibration mode and steady response acceleration amplitude of sieve basket was obtained by experimental test.The results show that the fifth step of natural frequency of horizontal vibration centrifuge is 21.98 Hz which is 9.06% lower than vibration frequency of vibration motor.The first step of natural frequency of sieve basket is 20.57 Hz which is 14.89% lower than vibration frequency of vibration motor;steady response acceleration amplitude of no-load sieve basket is 56.2 m/s2.Steady response acceleration amplitude of sieve basket is 58.6 m/s2 when the mass of the processed material is 290 kg,whose vibration absorption effect is 4.27% higher than that of no-load sieve basket.