摘要
为了提高双卧轴搅拌机的搅拌强度与效率,设计了围流与对流相结合的新型搅拌机.通过对围流与对流相结合的料流运动特点及叶片排列形式的理论分析,确定了在轴向大围流的基础上在搅拌缸两端设置对流区的总体方案;为了使物料在轴向有更多的推搅频次,并提高围流与对流的发生频次,确定搅拌机的拌缸为"宽短型",单轴搅拌臂安装相位角为60°,双轴搅拌臂采用正正平行非连续排列,搅拌叶片安装角取55°.设计方案应用在100L搅拌机上与围流为主的普通搅拌机进行搅拌性能对比试验,结果表明:采用围流与对流相结合的搅拌机料流有较高频次的围流运动,又有两个强烈混合的物料对流漩涡区,有效增加了搅拌强度,物料搅拌均匀所需搅拌时间比同类普通搅拌机减少约20%,提高了搅拌效率.
In order to improve the mixing intensity and efficiency of twin-shaft mixer,a wai flow combined with convective flow mixer was designed.Through the study of the characteristics of material flow and the theoretical analysis on arrangement pattern of the blades,two convective flow areas at both ends of mixing cylinder were set up.In order to improve the mixing frequency of mixture in axial and improve the mixing frequency of the wai flow and convective flow,wide and short mixing cylinder was confirmed.The installation phase angle of single-shaft mixing arms was 60° and the twin-shaft mixing arms were aligned to be positive-positive parallelly and nonsuccessive,the installation angle of mixing blade was 55°.The design scheme was applied to the 100 L mixer.Comparison mixing performance test with ordinary wai flow mixer was carried out.Results showed that the wai flow combined with convective flow mixer not only has high-frequency circular wai flow,but also has two intensively mixing swirl areas of mixture by convective flow,which improved the mixing intensity and the mixing time was reduced by 20% compared with the normal twin-shaft mixer.The mixing efficiency is improved.
作者
董武
冯忠绪
王振鹏
赵悟
姚运仕
DONG Wu;FENG Zhongxu;WANG Zhenpeng;ZHAO Wu;YAO Yunshi(Key Laboratory of Highway Construction Technology and Equipment of Ministry of Education Chang＇an University,Xi＇an 710064, China)
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2018年第2期295-300,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50678026)
陕西省重大科技创新专项资金计划项目(2008ZKC01-16)
中央高校基金(310825151044)
关键词
机械工程
双卧轴搅拌机
叶片排列
围流
对流
搅拌均匀性
mechanical engineering
twin shaft mixer
arrangement pattern of blade
wai flow
convective flow
mixing uniformity
