摘要
为了研究磁流体润滑油膜轴承内磁场的分布情况,分别通过永磁铁、螺线管及亥姆赫兹线圈对其施加3种不同形式的外磁场。通过磁场二维实体有限元模型的数值仿真,分析在3种模型下磁流体润滑油膜轴承的磁场分布特性,并比较磁场在油膜区的分布情况。结果表明,永磁铁模型的磁场主要分布在永磁铁、油膜、轴承座以及靠近磁铁的轧辊部分,螺线管模型的磁场主要分布在油膜、轴承座以及靠近磁铁的轧辊部分,亥姆霍兹线圈模型的磁场主要分布在线圈以及油膜的端部;3种模型在油膜区磁场分布沿轴向均呈现中间小、两端大的不均匀现象,且具有端部效应;永磁铁模型和螺线管模型在油膜区磁场沿径向分布均匀,亥姆霍兹线圈模型沿径向分布不均匀。
In order to study the distribution of magnetic field in the magnetic-fluid-lubricated oil-film bearings, three dif-ferent forms of the external magnetic field was exerted through the application of permanent magnet, toroidal solenoid andHelmhohz coils.Two-dimensional solid finite element model of magnetic field was established and analyzed to study themagnetic field distribution of three different models.The magnetic field distribution in oil film district for different modelswas compared.The results show that the magnetic field is different for three different models, it is mainly distributed in per-manent magnets, the oil film, bearing pedestal and roll part near the magnet for the permanent magnets model, mainly in theoil film, bearing pedestal and roll part near the magnet for toroidal solenoid model, and mainly in the coil and the end of theoil film for Helmholtz coils model.The magnetic field distribution of the three different models in oil film district has an endeffect and presents uneven distribution along the axial,which is small in the middle and large at ends.The magnetic fielddistribution in oil film district is uniform along the radial direction for the permanent magnet model and toroidal solenoidmodel, but not uniform for the Helmholtz coils model.
出处
《润滑与密封》
CAS
CSCD
北大核心
2015年第10期65-69,73,共6页
Lubrication Engineering
基金
国家青年科学基金项目(51205269)
山西省自然科学基金项目(2012011018-2)
山西省回国留学人员科研资助项目(2013-093)
关键词
油膜轴承
磁流体
磁场分布
oil-film bearing
ferrofluid
magnetic field distribution
