第 34 卷第 7 期 辽宁工程技术大学学报(自然科学版) 2015年 7 月
Vo l. 34
No.7 Journal of Liaoning Technical University(Natural Science) Jul. 2015
收稿日期:2014-10-17
基金项目:国家自然科学基金项目(59774033);中国煤炭工业协会科学技术研究指导性计划项目(MTKJ2011-325)
作者简介:李晓豁(1953-),男,辽宁 锦州人,硕士,教授,主要从事机械设计及理论方面的研究. 本文编校:焦丽
李晓豁,王金兴,郭娜,董伟松,杨杰.冲击破岩掘进机工作机构支臂与油缸铰点力仿真[J].辽宁工程技术大学学报:自然科学
版,2015,34(7):862-865. doi:10.11956/j.issn. 1008-0562.2015.07.019
Li Xiaohuo, Wang Jinxing, Guo Na, Dong Weisong, Yang Jie.Simulation of arm and hydraulic cylinder hinge point forces for
impacting-crushing rock-roadheader working mechanism[J].Journal of Liaoning Technical University:Natural Science,2015,
34(7):862-865. doi:10.11956/j.issn.1008-0562.2015.07.019
冲击破岩掘进机工作机构支臂与油缸铰点力仿真
李晓豁,王金兴,郭 娜,董伟松,杨 杰
(辽宁工程技术大学 机械工程学院,辽宁 阜新 123000)
摘 要:为研究冲击破岩掘进机凿岩过程支臂与各油缸铰点的受力情况,根据多体动力学理论建立该机工作机构运
动方程,运用 ADAMS 建立其虚拟样机模型.由波动力学理论确定了破碎头凿岩过程的随机载荷,通过对最大破碎
深度、最大破碎高度各支臂与油缸铰点力仿真,得到各铰点受力变化规律.结果表明:各铰点力随凿岩阻力变化,
波动明显,且与工作机构位姿有关;最大破碎高度时掘进油缸与支臂Ⅲ所受平均载荷最大,易使工作机构支臂产生
疲劳裂纹,影响其使用寿命.与 Matlab 计算结果对比,两者最大误差为 0.29%,证明所建模型及研究方法可行.
关键词:掘进机;工作机构;油缸;铰点;支臂
中图分类号:TD 421.5 文献标志码:A 文章编号:1008-0562(2015)07-0862-04
Simulation of arm and hydraulic cylinder hinge point forces for
impacting-crushing rock-roadheader working mechanism
LI Xiaohuo, WANG Jinxing, GUO Na, DONG Weisong, YANG Jie
(College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000,China)
Abstract: In order to find out forces on hinge points between arms and hydraulic cylinders for an impacting-crushing
rock-roadheader during drilling, the mechanism’s kinematic equations were built by means of multi-body dynamic
theory and its virtual prototype model was established by ADAMS simulation software. The random load of its
crushing head was confirmed by a wave kinetic theory. These hinge point forces under the biggest breakage depth and
the biggest broken height were simulated and their sizes and variations were found. The results show that these forces
change with drilling resistance and position, attitude of the mechanism, their trends are same and fluctuations are
obvious: each hinge point force changing with drilling resistance, it’s fluctuates significantly and related to the work
position; When driving oil cylinder with the biggest broken height, the average load of arm suffered most, this easy Ⅲ
to make the work mechanism of arm to produce fatigue crack and affect the service life. Compared with the result of
Matlab, the maximum error is 0.29%, which proves that the built model and the research method are feasible.
Key words: roadheader; working mechanism; hydraulic cylinder; hinge point; arms
0 引言
支撑式冲击破岩掘进机(简称掘岩机)是一种
用于煤矿井下岩巷掘进的新机型,其工作机构承受
剧烈变化的载荷作用,直接影响工作性能和使用寿
命.要搞清工作机构的力学特性,必须求得各支臂与
油缸铰点的受力情况.因其工作机构复杂,工况变化
大,采用类比法和经验取值法难以实现
[1-2]
,为此,
本文应用 Pro/E 建立工作机构三维实体模型,利用
ADAMS 进行力学分析
[3]
.因在支臂位于高位(支臂
位置达到最高且破碎头与工作面垂直)和低位(支
臂位置达到最低且破碎头与底板垂直)破岩时支反
力最大.为此,选择这两种工况对工作机构支臂与油
缸的铰点力进行仿真分析.
1 掘岩机工作机构动力学建模
掘岩机工作机构(见图 1)由破碎头 1、转锤
油缸、2、滑移油缸 3 掘进油缸 4、支臂 5Ⅲ 、龙门
底座 6、举升油缸 7、支臂 8Ⅱ 、支臂 9Ⅰ 等组成.支
臂Ⅰ上部安装的转锤油缸用于控制双钎头的破碎