Influence of Support Surface Shape of a Stationarily Installed Elastic Valve on the Change in Pre-impact Velocity of Impact Machine Striker

Abstract

The dynamic contact problem of the interaction between the impact machine striker and a conical annular elastic valve made of elastomer (rubber), which choks the reverse motion chamber in impact machines for mining and construction, is considered. The influence of the shape of the valve support surface on the drop in the pre-shock velocity of the striker during contact interaction is studied. Variants of the shape of the supporting surface of the valve are founded, at which the smallest drop in velocity is observed. For two variants, the dependence of the change in the decrease of the pre-impact velocity with an increase in the elastic properties of the elastomer was obtained. It is proved that with an increase in the elastic properties of the material, the drop in pre-impact velocity increases linearly, and for support surface shape that previously showed a smaller velocity drop, the pre-impact velocity drops less with increasing modulus of elasticity.