A NUMERICAL SOLUTION TO THE THERMAL-ELASTOHYDRODYNAMIC LUBRICATION OF ROLLING AND SLIDING CYLINDERS

摘要

In this report, existing isothermal theories of elastohydrodynamic lubrication of rollers are extended to include the effects of temperature in the fluid and the solids due to heating from rolling, sliding and compression of the lubricant The two dimensional finite difference method has been used in calculating the temperature in the fluid using local pressure-temperature dependent viscosity. Both the compressibility effect and the heat from Compression of the lubricant are considered in the solution of the Reynolds and the energy equation.nTwo series of results were obtained. The first is a heavily loaded series intended to correlate with Crook's experimental results, and the second is a moderately loaded series intended to correlate with temperature measurements taken at M.T.I.nThese results show that temperature has a significant influence upon the shape of the pressure, film profile, but very little effect upon the magnitude of the film thickness in the contact zone. The frictional force is, however, strongly influenced by the temperature rise in the film.nCrook's experimental film thickness data and those predicted by this report show good agreement; however, only partial agreement is shown to exist between the theoretical and experimental friction data. Fair agreement is shown between the measured and calculated temperatures (30).