孔底直线电机冲击器具有效率高、易于井下控制的优点，可广泛应用各种地质条件。这种新型冲击器钻进中直线电机定子和动子之间是往复直线运动的，在长期碰撞作用后，应力波会造成直线电机冲击器和部分关键部位（如减震槽末端）的疲劳破坏。本文采用Pro/E软件对直线冲击电机进行三维建模，然后基于疲劳寿命预测的相关理论，利用ANSYS Workbench有限元分析软件，进行冲击应力和虚拟疲劳仿真分析，在较短的时间内获得电机冲击器的预测疲劳寿命、寿命安全系数及危险部位等信息。并根据仿真中问题，研究了采用特殊滑动轴承结构、增加薄壁壁厚，末端增加减震环的改进方法，有效的解决了冲击器疲劳强度和寿命问题。
Abstract
When the linear motor working in the underground, the stator and mover are reciprocating. In the long-term impact exercise, stress can cause fatigue damage at the end of shock rod damping groove of linear motor. Using Pro / E software for three-dimensional linear motor, and based on the theory of fatigue life prediction, we use ANSYS Workbench finite element model. And for the impact of the process, a virtual simulation of fatigue in a short time to obtain electrical shock rod fatigue life prediction, safety factor and dangerous parts and other information. So it is a quickly and effectively method to determine the part of the force, reliability, fatigue life, etc. Based on the current issue, An effectively method will be improved. It is also an effective way to shorten the product design cycle, and the selection of materials, structural optimization design method to rapidly respond.
关键词
应力波 /
直线冲击电机 /
ANSYS Workbench /
疲劳仿真 /
改进方法
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Key words
vibration and wave /
linear motors；ANSYS workbench；fatigue simulation；improved method
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参考文献
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