Abstract
A mathematical model for calculating the pressure field of a hydrostatic support with an incomplete girth angle for a non-isothermal flow of a viscous working fluid using the iteration method is developed. The fundamental laws of hydrodynamics and the hydrodynamic theory of lubrication are used. The pressure field is calculated by jointly solving the Reynolds equation, the energy balance equation and the flow rate balance equation, as well as additional relationships for the thermophysical parameters of the working fluid, obtained by approximating the tabular values. The mathematical model of the pressure field takes into account all the characteristics and operating parameters of the hydrostatic support with an incomplete range angle, by setting the boundary conditions and geometric parameters of the working surface of the support liner. The developed system is solved by the numerical method of finite differences. A comparative analysis of the static characteristics of different designs of a hydrostatic support with an incomplete range angle is carried out. Recommendations are given on the choice of the number of pockets in the design of liners for a hydrostatic support with an incomplete range angle to ensure guaranteed floatation and maintain a given value of the working clearance in the fluid friction zone of the shaft journal and the bearing surface of the hydrostatic support liner when turning shafts of steam turbine.
Highlights
5. Nebojsa N., Zivota A., Jovan D., Dragan R., Stjepan G., Mitar J., Velibor K
The pressure field is calculated by jointly solving the Reynolds equation, the energy balance equation and the flow rate balance equation, as well as additional relationships for the thermophysical parameters of the working fluid, obtained by approximating the tabular values
The mathematical model of the pressure field takes into account all the characteristics and operating parameters of the hydrostatic support with an incomplete range angle, by setting the boundary conditions and geometric parameters of the working surface of the support liner
Summary
5. Nebojsa N., Zivota A., Jovan D., Dragan R., Stjepan G., Mitar J., Velibor K. An Analytical Method for the Determination of Temperature Distribution in Short Journal Bearing Oil Film // Sym- 19. 6. Feng Shen, Cong-Lian Chen, Zhao-Miao Liu. Effect of Pocket Geometry on the Performance of a Circular Thrust Pad Hydrostatic Bearing in Machine Tools // Pp. 700 714.
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