永磁丝杠推力及其影响因素研究

发布时间：2018-05-13 07:23

  本文选题：永磁丝杠 + 推力　； 参考：《河南理工大学学报(自然科学版)》2016年06期

【摘要】：针对永磁丝杠的丝杠和螺母之间不存在机械接触,两者依靠永磁体磁场的耦合实现丝杠旋转运动与螺母直线运动之间的运动变换等问题,对永磁丝杠的传动原理、传动比及推力进行理论分析,推导出传动比和推力与磁极节距、磁极对数、磁极宽度及丝杠直径等结构参数之间的关系式,提出磁极宽度、磁极对数和丝杠直径3者的约束条件。通过有限元仿真,对磁极节距、气隙长度、磁极厚度及轭铁厚度等因素对推力的影响进行研究。结果表明,气隙长度对推力的影响最大,且随着气隙长度增大,推力近乎线性减小。推力随磁极节增大以近似抛物线的关系变化,且在磁极节距8 mm时推力达到最大值。丝杠和螺母的磁极厚度变化对推力的影响基本相同,即磁极厚度越大推力越大;但在磁极厚度≤5 mm时推力变化较快,当磁极厚度超过5 mm后推力变化趋于平缓。丝杠和螺母轭铁厚度的变化对推力没有影响。
[Abstract]:Aiming at the problem that there is no mechanical contact between the lead screw and the nut of the permanent magnet lead screw, they rely on the coupling of the permanent magnet magnetic field to realize the motion transformation between the rotating motion of the lead screw and the linear motion of the nut, and the transmission principle of the permanent magnet screw is discussed. Through theoretical analysis of transmission ratio and thrust, the relationship between transmission ratio and thrust and magnetic pole pitch, logarithm of magnetic pole, width of magnetic pole and diameter of lead screw are derived, and the width of magnetic pole is put forward. Constraints for pole logarithm and screw diameter 3. Through finite element simulation, the effects of pole pitch, air gap length, magnetic pole thickness and yoke thickness on thrust are studied. The results show that the air gap length has the greatest influence on the thrust, and the thrust decreases linearly with the increase of the air gap length. The thrust varies with the increase of the pole node by the relation of parabola, and the thrust reaches the maximum value when the pitch of the pole is 8 mm. The change of magnetic pole thickness of screw and nut has the same effect on thrust, that is, the greater the thickness of magnetic pole, the greater the thrust, but when the thickness of magnetic pole is 鈮，

本文编号：1882223