Analysis And Experimental Study Of Load-bearing Characteristics On Hybrid Bearing

The development of modern industry put forward more and more high demand of stability and high-speed overloaded, The Hybrid Bearing has been applied more and more because of the special performance. The Hybrid Bearing composite of the dynamic pressure bearing and hydrostatic bearing's advantages, which is good carrying capacity and the nice dynamic performance in both the low speed and high speed, have a wide range of speed and no friction work area, have high position precision and rotation precision, and has better stability and so on. The structure of the Hybrid Bearings obtains the effect of two bearings, Supplement each other. The Hybrid Bearing has wide application prospects in industry field especially precision machine tool industry field.At the beginning, this paper introduced the Hybrid Bearing's theoretical knowledge and numerical theory of computational fluid dynamics, and then made numerically analysis of the work principle and the structure performance of the hybrid bearing throttling, based on above, this paper focusing on the analysis of the relationship between the hybrid bearing's properties and the parameters, made further analysis of the influence that structure parameters, the throttle and the lubrication neurogen on the hybrid bearing's load carrying characteristics.Secondly, after the analysis on the characteristics of Hybrid Bearing, we starting with the main operating parameters of hybrid bearings, based on CFD, take the four-chamber hybrid bearings as the research object, take FLUENT6.3as tools, the study focuses on the effect of throttling structure, oil supply pressure, spindle speed, eccentricity and width diameter ratio of bearings on bearing capacity character, oil pressure distribution, attitude angle, oil film stiffness and other related parameters.By comparing and analyzing the oil film bearing capacity character under the different input parameters, the improve oil film bearing capacity measures are proposed to increase reliability of numerical simulation in calculation of the design of hybrid sliding bearings, and provide an effective means to the comprehensive study of static and dynamic characteristics of oil film bearings and lubrication flow of media.