摘要
飞轮储能轴系采用非接触磁轴承,卸载轴系80%~90%重量,以降低下支承磨损和功耗。提出铠装钕铁硼永磁轴承设计方法,并应用于400 k W飞轮储能工程样机的磁轴承设计。该设计构型简单,单磁环被包在磁轭中,转子部分无永磁材料,规避振动和散热问题。磁环采用扇形磁瓦拼接,可满足大卸载力需求,其磁场不均匀性对轴向卸载力影响可忽略。工作间隙附近,轴承吸力与间隙大小关系近似线性化。工作间隙中磁轭面积约是磁环面积2倍时,轴承获得最大吸力。高效设计流程方法使磁环体积减少24.4%。给出了不同转速下的轴承最大卸载力设计参数。
Upper non-contact magnetic bearing used in flywheel energy storage system should relief 80% ~ 90%weights to reduce friction and consumption of under bracing and bearing. Based on Finite Element Method( FEM),an armored Nd Fe B( Neodymium Ferrum Boron) permanent magnetic bearing( PMB) design method was proposed and was applied in 400 k W flywheel energy storage system prototype design and experiment. In the simple structure,rotor without permanent magnet could avoid vibration and heat deposition. Permanent Magnetic( PM)rings assembled with tile-shaped blocks were suitable for huge unloading force requirement without any worry about the non-uniform magnetic field. Bearing suction was approximately linear relational to the gap size near working gap. Bearing suction could reach the maximum when the ratio of magnetic yoke and magnetic ring was near 2.According to optimizing process,we concluded an efficient design process,making the PM volume reduced by 24.4%,and gave several more designs of armored PMB with max unloading force under different rotary speed.
出处
《机械科学与技术》
CSCD
北大核心
2015年第6期858-862,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
清华大学自主科研计划项目(2011081032)资助
关键词
永磁轴承
拼装磁环
非均匀磁场
有限元计算
轴向卸载力
angular velocity
assembled PM ring
axial unloading force
bearings(machine parts)
calculations
design
energy storage
experiments
finite element method
magnetic fields
measurements
non-uniform magnetic field
optimization
permanent magnets
PMB
rotors
vibrations(mechanical)
