共查询到18条相似文献,搜索用时 210 毫秒
1.
2.
3.
4.
5.
6.
针对颤振球磨机通过运动耦合增强粉磨能力的问题,基于EDEM仿真分析了不同振幅下筒体内介质运动形态,获得了不同振幅下磨机内介质碰撞能量分布,据此得出了各振幅下磨机粉磨能力的对比,然后通过调整振动电机内偏心块夹角改变了颤振球磨机的振幅,进行了不同振幅下的粉磨实验,验证了仿真分析得到的结果。仿真与粉磨实验研究结果表明:通过调整振幅可以改变磨机筒体内研磨介质的碰撞能量分布,采用大振幅有利于粉碎较粗物料,采用小振幅有利于粉碎较细物料,在粉磨过程中调整振幅以适应物料粒度的不断变化是提高磨机粉磨效率的有效途径。 相似文献
7.
分布式STD总线工控机测控系统的应用沈阳大学范立南磨机是选矿生产的主要设备,在各种类型的磨机中,由于自磨(特别是湿式自磨)具有简化工艺流程、减小磨矿段数、节约介质消耗、降低磨矿费用、提高选别指标和过粉碎现象少等况点,所以近几十年来,国内外一些新建、扩... 相似文献
8.
搅拌磨机介质运动离散元数值模拟分析 总被引:2,自引:0,他引:2
针对搅拌磨机应用广泛但对其内部介质运动信息了解甚少的现状,以某公司立式搅拌磨机为研究对象,运用三维离散元方法跟踪磨机内的介质颗粒,考虑其重力、摩擦力和碰撞力的综合作用,建立了搅拌磨机系统的数学模型,对磨机内介质颗粒的复杂运动全过程进行了数值模拟。研究结果表明,在螺旋搅拌器附近的介质球速度值较大,粉磨效率较高,搅拌磨机系统在运行中达到近似平衡状态,系统摩擦功随时间线性增加,但总动能在固定值上下波动。 相似文献
9.
江阴市康辉机械制造有限公司是专业生产万能粉碎机的厂商,该厂的20B、30B型万能粉碎机组,可广泛适用于制药等行业的脆性物质的粉碎,其是利用动齿盘和静齿盘间的相对高速运动离心力作用,使待粉碎物料在齿间产生撞击、被撕裂或研磨达到粉碎效果。由进料斗、粉碎室、集料箱、吸尘箱和传动电器等部分组成,其间产生的粉尘将由 相似文献
10.
11.
Grain trajectory and grain workpiece contact analyses for modeling of grinding force and energy partition 总被引:1,自引:0,他引:1
Dexiang Wang Peiqi Ge Wenbo Bi Jingliang Jiang 《The International Journal of Advanced Manufacturing Technology》2014,70(9-12):2111-2123
To achieve controlled stress grinding and controlled grinding of the depth of modificative layer, coupled analysis of grinding force and grinding heat is required. Therefore, this paper investigated grinding force and energy partition to lay a foundation for the coupled analysis. Firstly, a new grinding force model based on the analyses of grain trajectory and grain workpiece contact. In the modeling of grinding force, critical grain indention depths for plowing and cutting were calculated and the grinding force models of a single grain were established. This model can analyze the contributions of sliding, plowing, and cutting to total grinding forces. Secondly, an energy partition model was established based on the analyses of grain trajectory and grain workpiece contact. In the modeling of energy partition, the real contact area ratio and the grain contact radius were calculated. Finally, experiments were pursued to validate the grinding force model by comparing the experimental measurements to the theoretical results. Comparisons showed reasonable agreement quantitatively. 相似文献
12.
13.
We investigate wear of the abrasive disk end face during the grinding of raw stones into beads. The disk wear was measured after grinding of beads by different techniques: grinding in a vertical drum, in a disk separator, with an inclined abrasive disk, and by placing stones into a segment-like container. The factors are determined that relieve impact loads when beads are preground from brittle materials. The results of studies of pregrinding of beads from cube-shaped gems with an inclined abrasive disk are shown. 相似文献
14.
15.
16.
17.
18.
针对传统加工方式难以获得轴承套圈较小的表面粗糙度和表面波纹度的问题,采用超声辅助内圆磨削的加工方法来改善轴承套圈的表面质量。基于超声内圆磨削单颗磨粒运动轨迹分析,建立了表面粗糙度的理论模型,通过对轴承套圈进行超声内圆磨削试验,研究了各个加工参数对轴承表面质量的影响。研究结果表明:超声内圆磨削加工方法可明显改善轴承的表面质量;增大超声振幅可减小表面粗糙度而表面波纹度会先减小后增大;随着砂轮转速的增大,表面粗糙度及表面波纹度会先减小后增大;磨削深度和进给速度的增大会使表面粗糙度及表面波纹度增大,但超声内圆磨削可减小它们的增加量。 相似文献