Study on the Interaction Law between the Shape Parameters and Permanent-magnetic Adhesive Force of Railway Permanent-magnetic Track Brake Equipment

摘要

This paper systematically analyzes the interaction law on how the shape parameters of brake magnet yoke affect the magnetic field distribution and the permanent-magnetic attraction by means of parameterized finite element numerical calculations based on the basic principles of train permanent track brake device and the mathematic model of permanent-magnetic attraction[1]. It is found: the permanent-magnetic attraction decreases with the increase of the width of rotor partition board and maximum value of the attraction appears at 16-20nm; the attraction slowly increases along with the increment of slipper chamfering but will decrease when the magnetic induction intensity of the material is saturated; the increase of the rotating angle of rotational magnetic axis leads to decrease of permanent-magnetic attraction; the vertical air gap between permanent-magnetic track brake and steel rail will make the attraction dramatically drop; and the slipper wear almost has little impact on the attraction. The shape parameters of magnetic track brake should be optimized in design by considering the permanent-magnetic attraction so that the efficiency of the brake can be brought into full play.