Abstract
The paper describes the features of using the method of damped mechanical vibrations for express diagnostics of current collectors without removing from electric rolling stock roof. The proposed method is based on preliminary determination of the mechanical characteristics of the system of movable frames of a serviceable current collector in the factory. The paper describes a technique that can significantly reduce the complexity of conducting this type of research, increase the speed of measurement, and reduce the influence of the human factor.
Highlights
Global trends in increasing railway transport speeds are reflected in the “Strategy for the development of railway transport in the Russian Federation until 2030”, approved by decree of the Government of the Russian Federation No 878-R of June 17, 2008 [1], according to which, one of the priority areas of development is to increase the efficiency of electric rolling stock
The proposed method does not require removing the current collector from the roof of an electric rolling stock, since the mass of a stationary electric locomotive or an electric train car is very significant compared to the mass of the vibrating parts of the current collector
Experimental studies performed in the laboratory “Contact networks and transmission lines” of Omsk State Transport University (OSTU), allowed comparing the rigidity of the system of moving frames of physical model of the current collector, measured in the traditional way, with those obtained according to the proposed method
Summary
Global trends in increasing railway transport speeds are reflected in the “Strategy for the development of railway transport in the Russian Federation until 2030”, approved by decree of the Government of the Russian Federation No 878-R of June 17, 2008 [1], according to which, one of the priority areas of development is to increase the efficiency of electric rolling stock. The creation of new equipment for transport systems is included in the List of priority areas for the development of science, technology and machinery of the Russian Federation (approved by the Decree of the President of the Russian Federation of July 07, 2011 [2]), increasing the readiness of the transport industry for import substitution, reducing dependence on supplies from abroad, which is an urgent issue in the current geopolitical and epidemiological situation. A distinctive feature of single-lever current collectors is the lack of developed kinematic connections that ensure the stability of the system of movable frames under the action of transverse and longitudinal loads. These types of loads lead to elastic deformations of the lower and upper levers.
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