期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2014
卷号：2
期号：12
出版社：S&S Publications
摘要：Hydrostatic bearings have an excellent static and dynamic behavior and are used for different kinds ofapplication. Application of hydrostatic bearings is limited by friction and therewith by velocity. Typical characteristicsof the hydrostatic system (load, stiffness, flow) are calculated without a velocity dependency. The geometry of thehydrostatic bearing pockets and their restrictors are optimized by using time continuous pressure distribution at thebearing pocket, laminar flow behavior as well as constant velocity of the bearing. The dynamic effects of the flow athigh velocities are not considered. The paper reflects the common design and calculation methods and shows theirlimitations in regard to the calculation of hydrostatic bearings at high velocities. It analyzes the results of complexdynamic flow simulations of hydrostatic bearings and presents a new design and optimization concept of hydrostaticbearings. This concept analyses the oil flow at high bearing velocities and it optimizes the bearing geometry, therestrictor geometry as well as the geometry of the main mechanical components.The parameters optimization design of a square hydrostatic bearing by using the HTGA/Gray method. We can foundthe performance simulation results of the proposed design are better than general hydrostatic bearing. Therefore, theproposed design have higher load capacity, higher stiffness and damping coefficients, lower flow rate and uniformpressure distribution by using the HTGA/Gray method. A Hydrostatic bearings test bench has been designed, built andset-up. The test bench has been monitored with pressure, flow-rate, temperature, displacement and force sensors.Expressions are obtained for the temperature distribution in an externally pressurized thrust bearing for the conditionwhen one bearing surface is rotated. The influence of centripetal acceleration and the combined effect of rotational andradial inertia terms are included in the analysis. Rotation of the bearing causes the lubricant to have a velocitycomponent in an axial direction towards the rotating surface as it spirals radically outwards between the bearingsurfaces. This results in an increase in the pumping losses and a decrease in the load capacity of the bearing. A furtherloss in the performance of the bearing is found when the radial inertia term in addition to the rotational inertia term isincluded in the analysis.
