摘要
Due to low viscosity of seawater,it is difficult to form a seawater-lubricated film.It is easy to cause the overload and burning phenomenon of seawater-lubrication sliding bearing,and then the operation stability and service life can be shortened seriously.Therefore,the paper introduces an electromagnetic suspension theory into the seawater lubricated sliding bearing.Then a novel magnetic-liquid double suspension bearing can be formed,which can enhance bearing capacity and stiffness greatly.Firstly,the structural characteristics,support-adjustment mechanism of magnetic-liquid double suspension bearing is analyzed.Secondly,based on force balance equation,electromagnetic equation and flow equation,the transfer functions of single DOF bearing system of magnetic-liquid double suspension bearing under constant-flow supply model are deduced.Then bearing capacity,static stiffness and total power loss are selected as static performance indexes.The influence rule of operaton and structural parameters on the static performance of single DOF bearing system will be analyzed.The results show that bearing capacity decreases with the increase of liquid film thickness and width of edge seals,bias current and coil turns decrease.Static stiffness decreases with the increase of liquid film thickness,edge seals width,bias current and coil turns.Total power loss decreases with the increase of liquid film thickness,edge seals width,bias current and coil turns decrease.And static performance indexes can not be affected by liquid viscosity.The proposed research provides some theoretical and experimental basis for the parameter design of magnetic-liquid double suspension bearing.
Due to low viscosity of seawater, it is difficult to form a seawater-lubricated film. It is easy to cause the overload and burning phenomenon of seawater-lubrication sliding bearing, and then the operation stability and service life can be shortened seriously. Therefore, the paper introduces an electromagnetic suspension theory into the seawater lubricated sliding bearing. Then a novel magnetic-liquid double suspension bearing can be formed, which can enhance bearing capacity and stiffness greatly. Firstly, the structural characteristics, support-adjustment mechanism of magnetic-liquid double suspension bearing is analyzed. Secondly, based on force balance equation, electromagnetic equation and flow equation, the transfer functions of single DOF bearing system of magnetic-liquid double suspension bearing under constant-flow supply model are deduced. Then bearing capacity, static stiffness and total power loss are selected as static performance indexes. The influence rule of operaton and structural parameters on the static performance of single DOF bearing system will be analyzed. The results show that bearing capacity decreases with the increase of liquid film thickness and width of edge seals, bias current and coil turns decrease. Static stiffness decreases with the increase of liquid film thickness, edge seals width, bias current and coil turns. Total power loss decreases with the increase of liquid film thickness, edge seals width, bias current and coil turns decrease. And static performance indexes can not be affected by liquid viscosity. The proposed research provides some theoretical and experimental basis for the parameter design of magnetic-liquid double suspension bearing.
作者
Zhao Jianhua
Wang Qiang
Zhang Bin
Chen Tao
Gao Dianrong
赵建华;Wang Qiang;Zhang Bin;Chen Tao;Gao Dianrong(ebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao 066004,P.R.China;Jiangsu Provincial Key Laboratory of Advanced Manufacture and Process for Marine Mechanical Equipment,Zhenjiang 212003,P.R.China)
基金
Support by the National Natural Science Foundation of China(No.51705445)
the Open Project Funding of Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control
the Open Project Funding of Jiangsu Provincial Key Laboratory of Advanced Manufacture and Process for Marine Mechanical Equipment
