The utility model relates to a movable blade for a centripetal high-efficiency flour separator, which is characterized in that the movable blade comprises an external wind wing section, a stroke wing section and an internal wind wing section, and the arc transition between the stroke wing section and the external wind wing section and the internal wind wing section, and the external wind wing section, the stroke wing section and the internal wind wing section are formed by bending in one. The centrifugal dynamic pressure produced by the high-speed rotating air flow through the moving blade is balanced by the external wind fin during the rotating process, thereby greatly reducing the powder selection resistance; at the same time, the internal wind fin and the external wind fin of the moving blade also have the disadvantage of preventing the product from returning to the powder selection area to produce the secondary powder selection phenomenon. Thus, the performance of reducing the pulverized coal resistance and ensuring the high efficiency of pulverized coal selection is realized. The utility model is applied to the technical effect of centripetal separator, which integrates CFD theoretical analysis, laboratory test and industrial application production data, and is mainly embodied in the aspects of low resistance of separator, high separating efficiency and high separating clarity.
【技术实现步骤摘要】
一种向心高效选粉机用动叶片
本技术属于粉磨
,特别是涉及一种向心高效选粉机用动叶片。
技术介绍
选粉机技术随着圈流球磨系统的应用而发展,经历了离心式选粉机(第一代)、旋风式选粉机(第二代)、高效笼型选粉机(第三代)的发展过程。高效笼型选粉机最早由日本小野田公司于1979技术,随后广泛应用于球磨机和立磨系统的各种物料、各种细度产品的粉磨系统,1987年中国国家建材局组织引进了该项技术。自笼型选粉机问世以来的30多年间,其结构形式出现了多种变化,产品种类层出不穷,但是核心原理基本相同:由外圈固定导风叶片和内部柱式笼型转子组成,依靠控制气体携带力、物料自重力和转子离心力三力的平衡对物料进行分选,其选粉原理图见图9和图10。传统的三力平衡选粉机的工作原理如下:出磨物料由提升机经由选粉机的喂料口5喂入选粉机,在重力的作用下,喂入选粉机的物料进入撒料盘6。撒料盘6跟随选粉机转子2以一定的速度转动,带动落入其上的待分选的物料旋转,待分选物料在离心力的作用下被抛撒至缓冲板7,并得到打散,然后在重力的作用下落入介于动叶片1、3和静叶片8之间的选粉区。一、二次风经进风口9进入选粉机,然后流经静叶片8进入选粉区12,进入选粉区的气流在转子动叶片1、3带动和静叶片8导流的双重作用下随转子转动,同时流经转子动叶片1、3,最后经转子内部及选粉机出口离开选粉机。落入选粉区的物料颗粒跟随选粉区旋转气流运动,受到图10所示的拉曳力Fd、重力G、离心力Fc,并按下述条件产生粗细分级:1)对于Fd≥Fc的颗粒,一方面在重力G的作用下做沉降运动,设颗粒在选粉区高度H的沉降时间为t1,另一方 ...
【技术保护点】
1.一种向心高效选粉机用动叶片,其特征在于:所述动叶片包括外风翅段、中风翅段、内风翅段,所述中风翅段与外风翅段、内风翅段之间圆弧过渡;外风翅段、中风翅段、内风翅段一体折弯成型;外风翅段的长度L1=(25~35)D/1000mm;内风翅段的长度L2=(20~30)D/1000mm;中风翅段的长度L3=(10~20)D/1000mm,中风翅段与外风翅段之间外圆弧R1=(15~20)D/1000mm,中风翅段与内风翅段之间外圆弧R2=(10~18)D/1000mm,外风翅段与中风翅段夹角β=50±10°,内风翅段与中风翅段的夹角α=15±5°;动叶片的厚度t=10~20mm。
【技术特征摘要】
1.一种向心高效选粉机用动叶片,其特征在于:所述动叶片包括外风翅段、中风翅段、内风翅段,所述中风翅段与外风翅段、内风翅段之间圆弧过渡;外风翅段、中风翅段、内风翅段一体折弯成型;外风翅段的长度L1=(25~35)D/1000mm;内风翅段的长度L2=(20~30)D/1000mm;中风翅段...
【专利技术属性】
技术研发人员:豆海建,王文荟,张明飞,王维莉,秦中华,杜鑫,贺孝一,
申请(专利权)人:天津水泥工业设计研究院有限公司,
类型:新型
国别省市:天津,12
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