By Ping Huang
Focusing on simple lubrication difficulties this e-book deals particular engineering purposes. The e-book introduces tools and courses for an important lubrication difficulties and their options. it really is divided into 4 components. the 1st half is set the overall fixing tools of the Reynolds equation, together with ideas of Reynolds equations with assorted stipulations and their discrete varieties, reminiscent of a steady-state incompressible slider, magazine bearing, dynamic bearing, fuel bearing and grease lubrication. the second one half supplies the ‘energy equation solution’. The 3rd half introduces equipment and courses for elasto-hydrodynamic lurbication, which hyperlinks the Reynolds equation with the elastic deformation equation. the ultimate half offers program lubrication courses utilized in engineering.
- Provides numerical resolution methodologies together with acceptable software program for the hydrodynamic and elasto-hydrodynamic lubrication of bearings
- Offers a transparent advent and orientation to all significant engineering lubrication difficulties and their solutions
- Presents numerical courses for particular purposes in engineering, with detailed subject matters together with grease-lubricated bearings and fuel bearings
- Equips these operating in tribology and people new to the subject with the elemental instruments of calculation
- Downloadable courses can be found on the spouse website
With an emphasis on transparent factors, the textual content deals a radical figuring out of the numerical calculation of lubrication for graduate scholars on tribology and engineering mechanics classes, with extra designated fabrics compatible for engineers. this is often an available reference for senior undergraduate scholars of tribology and researchers in thin-film fluid mechanics.
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Additional resources for Numerical Calculation of Lubrication: Methods and Programs
Example text
The specific formulas are given as follows. 2 Pressure Center The pressure center can be obtained by calculating the moment to the origin. 12) where t h, fh and t0, f0 are the shear stresses and frictional forces on the up and down surfaces z ¼ h and z ¼ 0, respectively. 13) where b is the width of the slider. 1 Introduction The calculation program for the incompressible and steady lubrication of a onedimensional slider consists of a main program and three subprograms, which are the Numerical Method and Program for Incompressible and Steady Lubrication 21 output subprogram OUTPUT, the film thickness calculation subprogram SUBH and the pressure computation subprogram SUBP.
01 $ 10À6, that is, the relative precision of convergence is from 1% to one per million. Next, a hydrostatic lubricated bearing is taken as an example to show how a hydrodynamic lubrication problem is solved with finite difference method. In stable operating conditions, the oil film thickness h of hydrostatic lubrication is a constant. If we do not consider relative sliding and thermal effects, the viscosity h is also a constant. 34) Set the dimensionless parameters X ¼ x/ l, Y ¼ /b and P ¼ p/ pr, where l is the length of the bearing, b is the width and pr is the pressure of the oil chamfer; and a ¼ l2/b2.
2. 2 Calculation diagram for rectangular plane squeeze. 02 Pa s; length of the rectangular plane L ¼ 30 mm; width of the rectangular plane B ¼ 24 mm. The parameter preassignment can be modified according to the user’s need, but the program needs to be recompiled and relinked before running. 4 47 Calculation results of rectangular plane squeeze. Instantaneous pressure distribution of rectangular plane squeeze. 3. 4, a pressure distribution is given for the instantaneous squeeze velocity and the corresponding film thickness.