Magnetic-liquid suspension guide-way system( MLSGS) is coupled supported by permanent magnetic suspension and hydrostatic bearing. The structure and bearing mechanism of MLSGS of heavy computer numerical control( CNC)...Magnetic-liquid suspension guide-way system( MLSGS) is coupled supported by permanent magnetic suspension and hydrostatic bearing. The structure and bearing mechanism of MLSGS of heavy computer numerical control( CNC) machine tools are introduced and the mathematical expression of bearing force of bearing unit is derived and it can be broken apart into six parts which sustains directly the coordinate components of broad external load,where the air gap of permanent magnet and hydrostatic oil film can be simplified as elastic supports,the compatibility equations of deformations for oil films and air gap are presented,and then the bearing capacity calculation of the bearing unit is transformed into a determinate problem. Considering the guide-way as a rigid body,the mathematics expression between the bearing unit's bearing force and the oil film variation is linearized,and the oil pocket's bearing capacity which bears different components of the external load is calculated separately. The six components of the bearing unit are added up,and the final general mathematics expression is derived. The proposed research offers a general simple method for calculating the bearing capacity of MLSGS with complicate constraint,which can be mastered simply by engineering designer and can improve design efficiency and accuracy.展开更多
Ya Hanzhang is a famous theorist of national issues,religious scientist and Tibetologist of contemporary China.He put forward a lot of innovative ideas in the research field of the issue of Hui people,the issue of the...Ya Hanzhang is a famous theorist of national issues,religious scientist and Tibetologist of contemporary China.He put forward a lot of innovative ideas in the research field of the issue of Hui people,the issue of the concept of Min-Zu,the issue of the formation of nations,the socialist national question,etc.He comprehensively expounded the policy of freedom of religious belief of China,profoundly analyzed the relationship between religion and superstition and promoted the study of Chinese atheism history.He made outstanding contributions in the study of the relationship between the central government of China and Tibet local government in history,the serfdom system in Tibet and Tibetan Lamaism,and展开更多
基金Supported by the National Natural Science Foundation of China(No.51705445)the Natural Science Foundation of Hebei Province(No.E2016203324)the Provincial and Ministerial Level Scientific Research Institutions Open Fund of Civil Aviation University of China
文摘Magnetic-liquid suspension guide-way system( MLSGS) is coupled supported by permanent magnetic suspension and hydrostatic bearing. The structure and bearing mechanism of MLSGS of heavy computer numerical control( CNC) machine tools are introduced and the mathematical expression of bearing force of bearing unit is derived and it can be broken apart into six parts which sustains directly the coordinate components of broad external load,where the air gap of permanent magnet and hydrostatic oil film can be simplified as elastic supports,the compatibility equations of deformations for oil films and air gap are presented,and then the bearing capacity calculation of the bearing unit is transformed into a determinate problem. Considering the guide-way as a rigid body,the mathematics expression between the bearing unit's bearing force and the oil film variation is linearized,and the oil pocket's bearing capacity which bears different components of the external load is calculated separately. The six components of the bearing unit are added up,and the final general mathematics expression is derived. The proposed research offers a general simple method for calculating the bearing capacity of MLSGS with complicate constraint,which can be mastered simply by engineering designer and can improve design efficiency and accuracy.
基金the phased achievement of the National Social Science Fund-Important Literature's Collation and Study of Major CPC Leader'Explications on Nationalism Each Period(No.:13CMZ002)China Postdoctoral Science Foundation-Study of Classic Marxist Writers'Nation-state Theory,Practice and Contemporary Significance(No.:2015T80184)the Project for Young Talent in Colleges and Universities of Hebei Province-Comparative Study on Socialist Country's Lessons of Dealing with Nationalism in the View of"Chinese Dream"(No.:BJ2014099)
文摘Ya Hanzhang is a famous theorist of national issues,religious scientist and Tibetologist of contemporary China.He put forward a lot of innovative ideas in the research field of the issue of Hui people,the issue of the concept of Min-Zu,the issue of the formation of nations,the socialist national question,etc.He comprehensively expounded the policy of freedom of religious belief of China,profoundly analyzed the relationship between religion and superstition and promoted the study of Chinese atheism history.He made outstanding contributions in the study of the relationship between the central government of China and Tibet local government in history,the serfdom system in Tibet and Tibetan Lamaism,and
