A Study the Axial and Radial Rotor Stability of the Turbo Machinery with Allowance the Geometry of the Surface and Properties of the Lubricating Fluid
Journal Title: Tribology in Industry - Year 2015, Vol 37, Issue 4
Abstract
An ensuring of the axial and radial rotor stability is one of the main objectives in the design and operation of the small-sized turbo-machinery. Hydrodynamic thrust bearings must securely restrain unbalanced axial forces, arising during any possible operating modes. Using of the different types of intermediate elements provides a stable position of the rotor in the radial bearings. Recently flexible rotors have been widely used in small-sized turbo-machines. The complexity of the implementation of methods for calculating the dynamics of these rotors is to solve a system of motion equations. The system of motion equations, which is presented in this work, contains the motion equation for the each bearing element, including the floating rings and elements of the rotor (wheels of the turbine and compressor, the central mass). The load acting on the bearings includes the masses of elements, the reaction of lubricating layers and the rotor imbalance, potential impact loads and forces torques, acting on the rotor from the other elements of the rotor. To calculate the reactions of lubricating layers for two-layer bearings the hydrodynamic pressure field and the friction losses were considered for a real bearing design, on the surface of which the sources of the lubrication is always located. The thrust bearings with segments of various designs have been considered, including laser texturing surface. The trajectories of the rotor elements of the turbo-machinery for various rotation velocities, as well as the elastic line of the rotor at different time points are represented as the results of the calculation.
Authors and Affiliations
E. A. Zadorozhnaya , S. V. Cherneyko , M. I. Kurochkin , N. A. Lukovich
Keywords
Related Articles
- EP ID EP122828
- DOI -
- Views 91
- Downloads 0
Reparatory and Manufacturing Hard-Facing of Working Parts Made of Stainless Steels in Confectionary Industry
In this paper, for the sake of improving the reparatory hard-facing technology is especially analyzed reparatory hard-facing of tools for manufacturing compressed products in confectionary industry. Those products are be...
Neural Network Modeling of Cutting Fluid Impact on Energy Consumption during Turning
This paper presents a part of research on power consumption differences between various cutting fluids used during turning operations. An attempt was made to study the possibility of artificial neural network to model th...
Effect of Heat Treatment on the Wear Behaviour of Functionally Graded LM13/B4C Composite
Aluminium alloy reinforced with boron carbide (10 wt.%) was fabricated using stir casting method followed by centrifugal casting and the cylindrical specimen with dimension 150 x 150 x 15 mm was obtained. The composite s...
Theoretical Investigation of Transient Ultra-Thin Lubricant Film During Rapid Deceleration
A theoretical model using Newton-Raphson technique to study the behavior of ultra-thin film thickness formation subjected to transient speed conditions is presented in this paper. The transient oil film pressure and oil...
Enhanced Biodegradability, Lubricity and Corrosiveness of Lubricating Oil by Oleic Acid Diethanolamide Phosphate
Impacts of oleic acid diethanolamide phosphate (abbreviated as ODAP) as an additive on biodegradability, anti-wear capacity, friction-reducing ability and corrosiveness of an unreadily biodegradable HVI 350 mineral lubri...