円筒の回転速度が変化した場合の弾性流体潤滑の数値解析

抄録

In the design of machine elements, in general, the approximate expression of Dowson is used to obtain a minimum film thickness of the elastohydrodynamic line contact. The approximate expression of Dowson is a calculation result of the elastohydrodynamic lubrication in the steady state. Therefore, there is possibility that error will arise if it is applied to nonsteady elastohydrodynamic lubrication. In this research, a numerical calculation was performed for nonsteady elastohydrodynamic lubrication caused by the change of the cylinder rotating speed. Then, the error caused by the application of the approximate expression of Dowson was examined. As a result, a maximum difference of about 15% was found in the range of calculation adopted by this research between the calculated value of the minimum film thickness obtained as a steady state and the calculated value obtained as a nonsteady state.