ELASTIC ANALYSIS OF ROTATORY HOLLOW CAST STEEL ROLLS OF THE PAPER MACHINE AND ITS APPLICATION

Considering the influence of centrifugal force of inertia (design speed), the strength calculation and optimum design of a hollow cast steel roll with axle sleeve of the high-speed paper machine are studied. The general formulas for calculating the contact pressure are derived from the theory of elasticity. Based on the concept of equal-strength design, the formulas for maximum Tresca equivalent stresses in the roll body and the axle sleeve are established and a method to calculate the optimum interference values is described. For a certain design speed, the example gives the curves which can be used for the structural optimal design of a cast steel roll. The present method and analytical solutions are expected to be useful in the strength calculation and optimum design of various rotatory ductile-material components with double-interference-fit construction.