卧螺离心机转鼓锥角结构设计及参数优化  

Structure Design and Parametric Optimization on Drum Cone Angle of Horizontal Screw Centrifuge

作　　者：荆宝德[1] 刘京广 王彬[3] 于萍[4] 

机构地区：[1]浙江师范大学工学院,金华321004 [2]长沙中联重工科技发展股份有限公司,长沙410013 [3]南车戚墅堰机车车辆工艺研究所有限公司,常州213011 [4]吉林大学机械科学与工程学院,长春130025

出　　处：《机械工程学报》2013年第4期168-173,共6页Journal of Mechanical Engineering

摘　　要：转鼓锥角是卧螺离心机设计中最为重要的一个参数,它的大小对于沉渣含湿率有重要的影响。目前只能根据试验数据选择锥角参数,不仅费时耗力,而且由于试验误差而无法找到最佳的角度。结合建筑泥水的特点,采用FLUENT软件研究转鼓锥段固液分离的规律;分别对锥角为6°、7.5°、9.5°、12°进行建模及三维网格划分,模拟分析不同锥角条件下卧螺离心机的转鼓速度场;设计出在一定程度上能够满足建筑泥水处理的大直径卧螺离心机双锥角转鼓。通过仿真试验表明,当锥角为9.5°时,最大沉积层厚度更接近于分料口,为最优的锥角参数;设计的转鼓双锥角结构的水泥分离液含湿率及处理率具有更高的处理量和更低的含湿率,其结构的整体性能得到很大的提高,增加了卧螺离心机的工作效率。The drum cone angle is the most important design parameters in the horizontal screw centrifuge, and its size has important implications to the sediment moisture rate. It can only select the cone angle based on the experimental data parameters at present. This method is time-consuming and labor-intensive, and can not find the best angle due to the experimental error. Firstly, combining with the characteristics of the mud buildings, the laws of solid-liquid separation of drum cone is studied by using FLUENT software. Then, the cone angles of 6°, 7.5 °, 9.5 °, 12 ° are selected to model and mesh. The drum velocity field of decanters under different cone angle is simulated and analysed. Finally, the double tapered drum of large diameter decanters is designed to meet the building mud. The simulation results show that the maximum sediment thickness is closer to the sub-discharge port when the cone angle is 9.5 ° which is an optimal cone angle parameter. The designed double tapered structure of the cement separation liquid moisture has a higher handling capacity and lower moisture content, so the structure of the whole performance is greatly improved and the work efficiency of decanters is increased.

关 键 词：卧螺离心机 转鼓 锥角 优化设计 

分 类 号：TG156[金属学及工艺—热处理]