The presented work is devoted to mathematical model operation of the clinoid support (a slider, a guide) working on micropolar fluid lubricant in the turbulent mode of a sliding friction taking into account dependence of viscous characteristics of mikroprolyarny lubricant on temperature and pressure. We consider for a case of ""lamina"" a set of equations of driving of thick incompressible liquid of micropolar lubricant taking into account dependence of viscous characteristics of mikroprolyarny lubricant on temperature and pressure, an equation of continuity and a formula of speed of a dissipation of energy for definition of the function Ф (х) caused by a melt of a surface of a basic ring. The main performance characteristics of the considered couple of sliding friction are as a result defined. Influence of parameter which is caused by a guide melt and also dependence of structural and viscous parameters of micropolar fluid lubricant on temperature and pressure upon a carrying capacity and a frictional force is estimated.
Keywords: hydrodynamics, a sliding support (a slider, a guide), viscid incompressible fluid micropolar lubricant, the melted guide surface, dependence of viscosity of lubricant on pressure and temperature
The paper presents a method for forming exact self-similar solution of the problem of calculating the compliant hydrodynamic journal bearing of finite length, running on layered lubricant in the axial lubrication. On the basis of the equations of motion of a viscous incompressible fluid, continuity equation and Lame equations for the case of a "thin layer" found the velocity and pressure, analytical expressions for the components of the supporting forces, the forces of friction and resistance forces axial movement of the lubricant. The analytical expressions for the value of the lubricant in the axial direction. The estimation of the parameters characterizing the ratio of the viscous layer adapted profile and the deformation of the elastic layer on the basic performance of the bearing. Established the most rational of the bearing capacity, the force of friction and lubricant consumption values of these parameters.
Keywords: radial bearing, load bearing capacity, stratified flow
This paper presents a method of calculating the hydrodynamic radial slide bearing runs on the lubricant that has both viscoplasticity properties. When developing the analysis model as the initial equations the nonlinear Maxwell model with the existence of the limit shear stress. Asymptotic solution of the problem was found in even powers of the parameter due to the presence of limiting shear stress of the lubricant. Found the velocity field and the pressure in the lubricating layer obtained analytical expression for the bearing capacity of the bearing. The estimation of influence of parameters characterizing the elastic properties of the lubricant (the Deborah number) and a dimensionless parameter characterizing the viscoelastic properties of the lubricant parameter (plasticity) on the bearing capacity of the radial bearing.
Keywords: radial bearing, bearing capacity, ultimate shear stress, the parameter of plasticity, deformation
As is known, currently in a model gidrodinaimcheskoy sliding bearing lubricant widely used micropolar lubrication. A major shortcoming of existing working models of bearings running on micropolar lubricant is that this does not take into account the dependence of viscosity characteristics of the micropolar lubricant on the pressure. Naturally, there is a need not only into account the dependence of viscosity characteristics of the pressure in the development of an analytical method for predicting the optimal carrying capacity characteristics inherent MICROPOLAR grease, but also predict the optimal profile of the reference surface of the radial bearing. [1-3 ]Solving this problem is devoted to this work.
Keywords: porous bearing, friction regime, the permeability of the porous layer, the viscoelastic lubricant.
The ability to choose the right anti-wear additives [1-6 ] allows you to create lubricants , which are thin layers have different properties than in large volumes. It is commonly assumed that the additives are functioning only in the zone boundary lubrication and are outside the scope of the hydrodynamic theory of lubrication . However, the beneficial effect of additives as indicated in many studies [1-5 ] we have in the " thin layer" of hydrodynamic lubrication .As is well known , lubrication bearings operate on different types of lubricants which are composed of base oil and additive compositions that provide the required functional properties of the oil . Additives polymers with high molecular weight oils impart viscoelastic properties . Analysis of existing studies [ 7-9] on the calculation of bearings running on a viscoelastic lubricant , shows that they do not take into account the dependence of the viscosity and shear modulus of the pressure and temperature, and mode of friction is assumed laminar. It is known [ 10 ] , high-speed bearings operating in turbulent friction , higher pressure and higher temperature, and so the development of methods for calculating the bearings running on a viscoelastic lubricant requires consideration of the above factors.In connection with the above written shall first develop the computational model of thrust bearings running on micropolar lubricant with the viscosity characteristics of the lubricant on the pressure in contrast to the existing theoretical models do not take into account these dependencies (task 1).And then consider the calculation model of extra load -bearing capacity , working on a viscoelastic lubricant for the dependence of its characteristics on the pressure (objective 2).
Keywords: thrust bearing with the abutment surface adapted, non-Newtonian lubricants