КОНТАКТНОЕ ПЯТНО ПРИ КОНФОРМНОМ ВЗАИМОДЕЙСТВИИ КОЛЕСАЖЕЛЕЗНОДОРОЖНОГО ПОДВИЖНОГО СОСТАВА С РЕЛЬСОМРассмотрены вопросы анализа профиля ко-леса и рельса для определения степени конформно-сти. Приведены математические выкладки, по-строены графические зависимости. Описаны усло-вия образования конформного контакта колеса с рельсом.Ключевые слова: конформное взаимодей-ствие, профиль колеса, профиль рельса, контактное пятно, степень конформности.D.Ya. Antipin, A.S. Kosmodamiansky, V.O. Korchagin
CONTACT SPOT AT CONFORMAL INTERACTION OF ROLLING-STOCK WHEEL WITH RAILThe problems in the analysis of a rail contour and a rolling-stock wheel for the definition of the degree of contact conformity are considered. Computations are shown, the geometrical parameters of a contact spot are calculated, graphical dependences are created. The results obtained are juxtaposed with the existing investigations in the field of a contact interaction of a wheel with a rail.The definition of contact spot parameters under conditions of operation widens the potentialities in control systems of a locomotive clutch. A method for the conformity degree detection in a deformed contact based on the width and area definition of a contact spot of a non-elliptical shape is offered. The essential and sufficient conditions for the formation of a conformal contact of a wheel with a rail are described with the use of a mathematical device, the integral and differential methods of functions investigations are used.
The problems of traction properties increase in locomotives are considered. The necessity in devices for instantaneous control of a friction coefficient of wheels and rails based on the impact of electric current or a magnetic field upon a wheel/rail contact area.
There are defined basic fields of researches essential for the actual realization of such devices. It is defined that devices based on electric current impact require the introduction of considerable changes in the units of a crew part for wheel pair insulation and searches of problem solution in the separation of traction current and control one and the prevention of control current impact upon alarm systems. It is offered to consider magnetic amplifiers of adhesion as a solution of a short-term outlook which can be introduced in an existing locomotive fleet and those using current impact as a solution of newly-developed promising machines. There is offered a design of an individual traction drive simplifying a problem in the arrangement of devices for instantaneous control of a friction coefficient.
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