Application of planetary reduction gear in operation of the two rope grab

Abstract

The paper presents the principles of calculation and design of crane's trolley intended to work with a two-rope grab having drive elements for moving and hoisting. The trolley moves along the lower girdle of the bridge crane. Mechanism for grab hoisting with two electric motors connected by a planetary reduction gear is considered. The role of the planetary reduction gear in selected solution for load hoisting drive is specially emphasized and calculation of main parameters of this gear is given. Operation principles of the grab's elements is presented and foundations of dynamic analysis during grab's operation are set