Numerical Analysis And Simulation Of Ferrofluid Bearing Lubrication Characteristics

This project is for the Ministry of Railway Technology Research and Development Program. In the context of China’s vigorously developing high-speed rail, in response to the traction motor speed, the bearing’s performance is related to China’s rapid development of high-speed rail. Magnetic fluid bearing has a high speed, good sealing, strong bearing capacity, etc., so meets the demand for high-speed rail, This article focuses on its lubrication zone numerical calculation and simulation.In this paper, Two-dimensional Reynolds equation is derived considering the magnetic field effect using the micro-element method, after which a special case (width journal), is solved by one dimensional approximate solution, showing the law in this case; after the introduction of the numerical solution of the Two-dimensional Reynolds equation, pressure and velocity distribution in lubrication area are obtained using MATLAB and VC mixed programming, and by use of that some steady state characteristics are calculated, including carrying capacity, deviation angle, side leakage, and friction compared with steady state characteristics in the presence of a magnetic field, conclusion of the general case of magnetic fluid lubrication advantages are shown; but in the case of high-speed and heavy load, higher temperature rise and pressure changes of influence on the viscosity, the temperature field and the viscosity field must be taken into consideration when calculating, the need to introduce the viscosity-temperature viscosity pressure equations and the energy equation is necessary. Then after the multi-field coupling numerical calculation based on the situation of high-speed and heavy load, the relevant parameters of the magnetic fluid bearing in the magnetic fluid, including Magnetic field intensity, speed and bearing gap thickness, are discussed and thus give a comprehensive evaluation of bearing performance and gives apply to the recommended size of the magnetic fluid bearings of high-speed rail. At last using finite element simulation of the magnetic field distribution points out that the characteristics of its magnetic field distribution, and lays the foundation for future work.