Model Pad Geometry Analysis

Tamara Evgenevna Ilina, Nikolay Vasilevich Prodan, Pavel Viktorovich Bulat


For gas-lubricated bearings the form of a lubricating clearance in many respects determines the carrying capacity value of the bearing. Furthermore, the parameters defining this form have, for the most part, the optimal values.

Today, the most typical for computation of a gas base layer is use of software with solvers which contain equations of the gas lubrication theory based on the Reynolds equation. However, the total computation of the system of gas feed into the gas-static bearing box in such setting meets methodical complications: in the gas feed system turbulent flows appear, and their computation is necessary to be carried out in the full Navier-Stokes equations with connection of the applicable model of turbulence, and there is a laminar flow in the lubricating film. The solution of the computation problem of the gas base layer in the Navier-Stokes full equations is considered. The method was verified with use of known self-similar solutions. Based on the tried-and-true method, parametric study of a pad with simple plain bores, a pad with a slotted nozzle and composite pads with angular clearances designed under the Rayleigh principle were carried out.

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