中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2012年
8期
900-905
,共6页
永磁悬浮轴承%转子偏心距%最小悬浮转速%转动惯量
永磁懸浮軸承%轉子偏心距%最小懸浮轉速%轉動慣量
영자현부축승%전자편심거%최소현부전속%전동관량
permanent magnetic bearing(PMB)%rotor eccentricity%minimal speed for suspension%rotational inertia
为研究永磁悬浮旋转体实现稳定平衡的最小转速与转动惯量的关系,设计了一种新型永磁轴承透平机,在同一定子内安装3个结构和尺寸相同但转动惯量不同的转子。测量3个转子的转动惯量,并用均匀分布在透平机定子外部的4个霍尔传感器测量转子偏心距。实验结果表明,当转速超过某一临界值时,陀螺效应使得永磁悬浮透平机转子维持稳定的悬浮,并且最小悬浮转速与转动惯量负相关,即转动惯量越大的转子悬浮需要的转速越小。
為研究永磁懸浮鏇轉體實現穩定平衡的最小轉速與轉動慣量的關繫,設計瞭一種新型永磁軸承透平機,在同一定子內安裝3箇結構和呎吋相同但轉動慣量不同的轉子。測量3箇轉子的轉動慣量,併用均勻分佈在透平機定子外部的4箇霍爾傳感器測量轉子偏心距。實驗結果錶明,噹轉速超過某一臨界值時,陀螺效應使得永磁懸浮透平機轉子維持穩定的懸浮,併且最小懸浮轉速與轉動慣量負相關,即轉動慣量越大的轉子懸浮需要的轉速越小。
위연구영자현부선전체실현은정평형적최소전속여전동관량적관계,설계료일충신형영자축승투평궤,재동일정자내안장3개결구화척촌상동단전동관량불동적전자。측량3개전자적전동관량,병용균균분포재투평궤정자외부적4개곽이전감기측량전자편심거。실험결과표명,당전속초과모일림계치시,타라효응사득영자현부투평궤전자유지은정적현부,병차최소현부전속여전동관량부상관,즉전동관량월대적전자현부수요적전속월소。
To analyze the relations between the minimal speed of permanent maglev rotator with its rotating inertia,one novel permanent maglev turbine model was designed:one stator and three rotors which had the same size but different rotational inertias.The three rotors' rotational inertias were measured,and four Hall sensors distributed evenly at the turbine's stator were used to measure the rotor's eccentricity.The results demonstrate that the rotors of the permanent maglev turbine can maintain stable suspension by gyroscopic effect when the speed is higher than a critical point.And the minimal speed for suspension has a negative correlation with the rotor's rotational inertia,namely,the bigger the inertia of the rotor,the smaller the required speed for suspension.