Experimental studies of pantograph head suspension equipped with controlled pneumatic elements

Abstract

The article describes factors which affect the panhead elastic elements performance during their operation. An analysis of these factors shows the need to use elastic elements with a controlled static characteristic at constant stiffness to ensure reliable current collection. The existing controlled pneumatic elements used in the panhead suspension of electric rolling stock are considered. Authors offer to use intra-spring pneumatic elements in panhead suspension. A study of the interaction of a pantograph and an overhead contact line is described. A methodology for experimental studies of pantographs equipped with controlled elastic elements in a head suspension has been developed. The experimental oscillation test system is described. An experiment was carried out according to the developed experiment design. The obtained data allow to build a regression model that characterises the standard deviation of the contact force on the frequency of vertical oscillations generated by the contact wire, the static force of the pantograph and the pressure in the intra-spring pneumatic element. The results of experimental studies indicate the preservation of the stiffness of the intra-spring pneumatic element within its static characteristics.

The use of PI-algorithm for high-speed electric rolling stock automatic control system

“…Regulation of static force is carried out by changing the pressure in the lifting rubber-cord element. To regulate the static characteristics of panhead suspension, intra-spring pneumatic elements (ISPE) are used [7], the static characteristics of which change due to changes in pressure in their cavity. In the pantograph, equipped with an ACS for the static force of pantograph frames 1 and static characteristics of panhead suspension, rubber-cord element 2 is used as a lifting element.…”

“…where ccat -stiffness of the contact (assumed to be equal 50 kN/m); ycat-y3 -gap between the contact wire and the pantograph head. The parameters of intra-spring pneumatic elements were obtained experimentally and within the working stroke (0 -50 mm) can be determined using the formula [10]:…”