摘要
为提高薄煤层采煤机的装煤量,建立了螺旋滚筒装煤量的数学模型。研究发现采煤机装煤量随叶片螺旋升角的增大呈先增后减的变化规律,并获得了最大装煤量时的螺旋升角;建立了采煤机截割部虚拟样机模型,基于实际工况加载仿真后发现,摇臂壳体和行星架的强度均显不足,根据仿真结果分别对其结构进行优化,优化后力学性能明显提高;摇臂壳体及行星架的可靠性随采煤机牵引速度的增大而降低,而叶片螺旋升角的变化对其可靠性的影响很小,可以忽略。综合以上考虑,在原设计基础上增大叶片螺旋升角、增加挡煤板,使采煤机装煤量提高了53%。
In order to improve the coal capacity of shearer working in shin coal seam, a mathematic mode/of spiral drum was established. The study found that the coal capacity of the drum increased at first and then decreased with the helical vane angle, and the helical vane angle had been got at the maximum coal capacity ; virtual prototyping model of shearer＇s cutting part had been established. After loading and simulation base on actual condition, the rock arm shell and planetary carrier＇s insufficient strength had been found. According to simulation results, the structures were optimized respectively and their mechanical properties significantly improved. The reliability of rock arm shell and planetary carrier declined with the increasing hauling speed, but the helical blade angle had a very small influence on it, which can be ignored. Integrated consideration, increasing the helical vane angle and adding spillplate on original design could increase the drum＇s loading performance by 53%.
出处
《机械设计》
CSCD
北大核心
2014年第7期97-101,共5页
Journal of Machine Design
关键词
装煤量
叶片螺旋升角
牵引速度
可靠性
coal capacity
helical vane angle
haulingspeed
reliability
