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一.适用类型和范围
斗式提升机一般根据安装方式、卸载特性、装载特性、牵引部件和料斗类型的不同进行分类。表1列出了不同类型斗式提升机的分类和适用范围。
表1斗式提升机的分类和适用范围
分类模式
Bie适应性表2中国常用的几种类型
类型
d型HL型PL类型ZL类型二、主要参数的计算
(1)运输能力:
(1)
式中q——运输能力,t/h;
-料斗容积,见表3;l;
——料斗间距,m;
v——提升速度,米/秒;
——填充系数,见表3;
——材料的松散密度,t/m3。
(2)料斗的计算:
(2)
根据公式(2)的计算值,查表3选择合适的斗式提升机类型。
选择料斗时,必须根据材料的最大块尺寸检查料斗口的最小尺寸:
≥mdmax (3)
式中——料斗口的最小尺寸,mm;
Dmax——材料的最大块度,见表5,mm;
m-系数,见表4。
表3斗式提升机主要参数
模型
准备运输量Q,m3/h箱比值io/
每米长度铲斗和链条的重量qokg/m输送带链条断裂强度运行速度Vm/s滚筒转速nr/min最大允许块效应充满毫米
层数注:S-是深圆底料斗;是一个浅圆底漏斗。
表4材料最大块度与系数m的关系
(3)功率计算:
(4)
式中n——电机功率,kw;
k-起动系数,k = 1.2 ~ 1.25
q——输送t/h;最,t/h;
h——输送高度,m;
-传动效率,= 0.9;
-提高效率:
输送散装物料= 0.25 ~ 0.4;
输送颗粒物料= 0.4 ~ 0.6。