沥青混合料搅拌设备激振力偏移式振动筛的仿真分析  

Simulation and Analysis of Vibratory Screen Featuring Offset Exciting Force for Asphalt Mixing Equipment

作　　者：李伟[1] 王红巾[1] 段永波[1] 刘东明[1] 

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室

出　　处：《工程机械》2012年第9期24-28,114,共5页Construction Machinery and Equipment

摘　　要：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。Vibratory sieve is an important integral part of the asphalt mixing equipment. In view of past designs where energized vibration had to pass thru mass center of the sieve that lowers the sieving efficiency so that we put forth a straight-line vibratory sieve to offset the vibratory force. We made dynamic mechanical analyses of the off-set vibratory sieve and introduced computation formulas to offset the vibrator from the mechanical mass center and for movements at optional positions of the sieve body. Therefore, we built a model for a vibratory sieve in the Benning Hoven model LB4000 mixer and a simulation in the ADAMS, and finally plotted motion curves at ends' test points of the sieve body to prove it to be one as a straight vibratory sieve offsetting the energetic vibratory force which has both motion features of circular vibratory sieve and straight-line vibratory sieve. So far, we have verified a correct simulation model thru comparison of test vibratory magnitudes while showing that it is an effective way to increase vibratory sieving and productivity by offsetting the energizing force from the mass center.

关 键 词：振动筛 激振力偏移 振幅 运动轨迹 ADAMS 

分 类 号：U415.5[交通运输工程—道路与铁道工程]