工况激励下采煤机7自由度非线性振动分析
发布时间：2018-11-26 12:47
【摘要】：为了研究采煤机牵引速度对其动力学特性的影响,采用截齿三向力描述采煤机滚筒截割激励,采用赫兹接触理论描述采煤机平滑靴支撑刚度与阻尼,采用间隙条件下齿轮啮合非线性模型描述采煤机导向滑靴与销排间支撑刚度与阻尼,根据拉格朗日动力学方程建立了采煤机整机7自由度动力学模型,采用数值求解方法求解了不同牵引速度下整机的振动特性,结果表明:随牵引速度的增大,对后滚筒的振动位移影响较大,对机身影响较小;机身Y轴方向振动摆角相对较为明显。
[Abstract]:In order to study the influence of shearer's traction speed on its dynamic characteristics, the cutting excitation of shearer drum is described by three direction force of cutter, and the stiffness and damping of shearer's smooth boots are described by Hertz contact theory. The nonlinear model of gear meshing under the condition of clearance is used to describe the stiffness and damping of support between guide slipper and pin row of shearer. According to Lagrange dynamic equation, a dynamic model of 7 degrees of freedom for shearer is established. The numerical method is used to solve the vibration characteristics of the whole machine under different traction speeds. The results show that the vibration displacement of the back drum is greatly affected with the increase of the traction speed, and the influence on the fuselage is small. The vibration swing angle of Y axis of fuselage is relatively obvious.
【作者单位】： 辽宁工程技术大学机械工程学院;辽宁工程技术大学国家地方联合矿山液压技术与装备工程研究中心;煤炭工业协会高端综采成套装备动力学测试与大数据分析中心;中国煤矿装备有限责任公司;
【基金】：国家自然科学基金(51404132)资助~~
【分类号】：TD421.6
本文编号：2358605
[Abstract]:In order to study the influence of shearer's traction speed on its dynamic characteristics, the cutting excitation of shearer drum is described by three direction force of cutter, and the stiffness and damping of shearer's smooth boots are described by Hertz contact theory. The nonlinear model of gear meshing under the condition of clearance is used to describe the stiffness and damping of support between guide slipper and pin row of shearer. According to Lagrange dynamic equation, a dynamic model of 7 degrees of freedom for shearer is established. The numerical method is used to solve the vibration characteristics of the whole machine under different traction speeds. The results show that the vibration displacement of the back drum is greatly affected with the increase of the traction speed, and the influence on the fuselage is small. The vibration swing angle of Y axis of fuselage is relatively obvious.
【作者单位】： 辽宁工程技术大学机械工程学院;辽宁工程技术大学国家地方联合矿山液压技术与装备工程研究中心;煤炭工业协会高端综采成套装备动力学测试与大数据分析中心;中国煤矿装备有限责任公司;
【基金】：国家自然科学基金(51404132)资助~~
【分类号】：TD421.6
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