Abstract
The current research of hydrostatic bearings and hydrostatic slide-ways is far from being over. The topic is constantly evolving, creating new geometries of the sliding bearings, developing new types of friction materials and lubricants. The control elements of hydraulic mechanisms that serve to regulation of the hydrostatic bearings tipping are still in progress. Almost every application has different requirements for the bearings, whether in terms of loading capacity, speed rotation, and also the price. All these aspects should be included in the design of hydrostatic thrust bearings. Thanks to great advances in the development of computer technology and software for numerical modelling, we can simulate real movement of viscous fluids. To create a numerical model of hydrostatic thrust bearing, Ansys Fluent 14.0 software package has been applied. The article describes the basic methods of numerical modelling of the given problem and evaluates the pressure field and the loading capacity of annular multi-recess hydrostatic thrust bearing and its dependence on the change in static pressure.
Highlights
The inventor of the hydrostatic bearing was L
The article describes the basic methods of numerical modelling of the given problem and evaluates the pressure field and the loading capacity of annular multi-recess hydrostatic thrust bearing and its dependence on the change in static pressure
If the bearing geometry was defined only as a section and the whole geometry was created by means of periodic conditions, we could not define the size of the mass flow rate in every single recess
Summary
The inventor of the hydrostatic bearing was L. Rowe in 1983 wrote the basic theory for the design of control valves of the hydrostatic bearing He used theorems, which are mainly related to the static properties of different types of hydrostatic bearings and reducers (capillary, slot, orifice, with constant flow rate) [6]. Osman et al (1996) compared hydrostatic thrust bearing with one central recess and more lubrication recesses in their article They recommend the use of hydrostatic bearing with multiple recesses for greater load. If the sliding bearing is loaded, the plastic deformation of the plate changes the profile of the fluid film and the performance characteristics These studies show that flexibility of the bearing quite significantly influences its performance characteristics and for optimum design parameters such as the type of reducer must be taken into account. Model LES (Large Eddy Simulation) belongs to turbulent models and is based on the simulation of large vortices as time-dependent spatial units that can be caught with mesh
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