摘要
井下工作面粉尘不仅影响工人身体健康,而且容易引发粉尘爆炸等安全事故。螺旋滚筒的内喷雾系统在解决粉尘污染产生问题上起着至关重要的作用,因此设计出具有良好性能的内喷雾系统的螺旋滚筒至关重要。以MG325采煤机为依托,采用Pro/E和GAMBIT建立该采煤机截割机构及其工作面有限元模型,选用双湍流流动数学模型构建滚筒内喷雾数学模型,通过FLUENT对内喷雾系统外流场进行仿真分析,分别分析喷雾压力、喷嘴口径、扩散角和喷雾入射角对雾滴粒径、运动速度等雾化效果的影响。研究表明:当喷雾压力为5 MPa、喷嘴口径为1.2 mm、扩散角为60°、内喷雾入射角为15°时,喷雾效果最佳。分析结果为提高采煤机螺旋滚筒喷雾降尘效率提供了明确的量化依据,为喷雾系统的设计提供了新的理念和方法。
Dust on the underground mining surface not only affects the health of workers, but also results in dust explosion and other safety accidents. The internal spray system of spiral drum plays an important role in addressing dust pollution. Thus,it is very important to design the internal spray system of spiral drum characterized with good performance. Taking the shearer of MG325 as an example, the finite element model of the coal mining surface and the shearer＇s cutting mechanism is established by means of Pro/E and GAMBIT. The mathematical model of double turbulent flow is selected to establish the mathematical model of internal spray. By means of FLUENT, the simulation analysis on the outflow field of internal spray system is conducted; an analysis on the influence exerted by spray pressure, nozzle diameter, diffusion angle and spray incident angle upon atomizing effects, such as spray particle diameter, velocity and so on, is conducted. The results show that when the spray pressure is 5 MPa, the nozzle diameter is 1.2 mm, the diffusion angle is 60°,and the spray incident angle is 15°. Thus, the spray effect is optimal. The result provides clear quantitative basis for improving the efficiency of shearer spiral drum＇s spray and antidust, and brings about new ideas and methods for the design of spray system.
作者
刘旭南
赵丽娟
陈佳豪
朱保旭
范思民
LIU Xu-nan;ZHAO Li-juan;CHEN Jia-hao;ZHU Bao-xu;FAN Si-min(College of Mechanical Engineering,Liaoning Teehnieal University,Fuxin 123000)
出处
《机械设计》
CSCD
北大核心
2018年第7期47-51,共5页
Journal of Machine Design
基金
中国煤炭工业科技计划资助项目(MTKJ2009-264)
辽宁省自然科学基金资助项目(20170540420)
