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振动筛是沥青混合料搅拌设备的重要组成部分。针对以往设计中因强调振动筛的激振力通过振动筛质心而造成筛分效率不高的缺点,提出激振力偏移式直线振动筛。对激振力偏移式振动筛进行动力学分析,导出激振器偏移机体质心的振幅计算式和筛体任意点的运动方程式。对边宁霍夫LB4000型搅拌设备振动筛进行建模,并在ADAMS中仿真,最后在Matlab中做出筛体两端测点的运动轨迹,证明该筛体为激振力偏移式直线振动筛,兼具圆振动筛与直线振动筛的运动特性。通过与试验振幅对比,仿真模型的正确性得到验证,同时表明激振力偏移质心是提高振动筛筛分效率与生产率的一种有效途径。
Vibrating screen is an important part of asphalt mixing plant. Aiming at the shortcomings that the screening efficiency is not high because of emphasizing the exciting force of the vibrating screen through the center of mass of the vibrating screen in the past design, the vibrating screen with the exciting force offset type is proposed. The dynamic analysis of exciter force shaker was carried out to derive the amplitude calculation formula of exciter body mass center and the equation of motion at any point of sieve body. The modeling of Beininghoff LB4000 agitating equipment shaker was modeled and simulated in ADAMS. Finally, the trajectory of measuring point at both ends of sieve body was made in Matlab, and it was proved that the sieve body was a straight line vibration Screen, both circular vibrating screen and linear vibrating screen of the movement characteristics. The correctness of the simulation model is verified by comparison with the test amplitude. It is also shown that the eccentric center of excitation force is an effective way to improve the screening efficiency and productivity of the shaker.