整体称量悬臂式皮带秤结构参数与误差分析  

The structure parameters and error analysis of whole-weighing cantilever belt conveyor scale

作　　者：刘洪海[1] 王守习 张永卫 袁安 曾凡记 

机构地区：[1]长安大学工程机械学院,陕西西安710064 [2]中国交通建设集团西安筑路机械有限公司,陕西西安710064

出　　处：《广西大学学报（自然科学版）》2016年第3期658-665,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家十二五科技支撑项目(2011BAE28B03);陕西交通科技项目(15-02k);教育部中央高校基本科研业务费专项资金资助(2014G3252006)

摘　　要：沥青混合料搅拌设备冷料配料系统通常采用电子皮带秤计量,由于受"皮带效应"的影响会产生称重力变化,造成较大的计量误差。借鉴皮带秤计量原理,研发了整体称量悬臂式皮带秤,可以避免"皮带效应"的影响。通过建立料流重心的动态模型,分析了料流波动引起的测量误差与皮带长度之间的关系,结果表明皮带越长,计量误差越小,并存在3 m拐点,当长度小于拐点时,随长度增加计量误差迅速减小;当长度大于拐点时,随长度增加计量误差减小得十分缓慢。通过对4000型搅拌设备配套的该皮带秤进行试验研究表明计量误差能控制在0.6%以内,较传统的电子皮带秤显著提高,工作稳定可靠。The electronic belt scale is commonly used by the batching system of asphalt mixing plant to measure the flow rate of cold charge, the influence of ＂belt effect＂ on the variation of gravity will result a larger measurement error. Based on the measuring principle of belt scales, whole-weighing cantilever belt metering device was developed to avoid ＂belt effect＂. The relationship between meas- urement error caused by stream fluctuations and belt length was analyzed by means of the establish- ment of the dynamic model of material flow center of gravity. The result showed that the longer of belt length, the smaller of measurement error, and there was a 3 m inflection point. When the length was less than the inflection point, the measurement error was rapidly reduced with the in- crease of the length; when the length was greater than the inflection point, the measurement error was reduced very slowly with the increase of length. The field study showed that whole-weighing cantilever belt metering error was controlled within 0.6%. Compared with traditional belt electronic scale, the measurement precision and the stability of working process have been improved significantly.

关 键 词：搅拌设备 计量装置 皮带秤 计量精度 

分 类 号：U415.52[交通运输工程—道路与铁道工程]