Determination of parameters of cable drums of capstanshunting winches

Abstract

The article considers the problem of determining the rational geometric parameters of friction cable drums of capstan shunting winches. The basic technical means for performing shunting works within the cargo yards of railway stations and industrial enterprises are given. Today, shunting locomotives are the most common means of shunting works at railway stations and cargo yards of industrial enterprises. However, using them is not economically feasible for small amounts of shunting. Both sheave-type and capstan shunting winches are often used to move individual cars or groups of cars along the freight front. In the capstan shunting winches, a frictional drum of infinite coiling length is used, which rotates around a horizontal axis. It is established that the known sources give only the theoretical principles of the operation of drums of infinite coiling length and do not contain any practical recommendations for the design and operation of capstan shunting winches. The article provides a theoretical study of the forces of friction that occur between the drum and the cable, as well as between the cable lines when drums with different profiles of working surfaces are used. It was found that in shunting winches, the coefficient of friction of the rope along the drum can increase by 2.5 times, as a result of which it is necessary to increase the curvature of the profile of the drum. Also, friction forces between adjacent branches of a cable wound on a winch drum are considered. On the basis of the conducted study, recommendations on the type and geometrical parameters of cable drums of capstan shunting winches are proposed, which are aimed at extending the service life of traction cables of these mechanisms.