Abstract
An analytical review of the existing types of level crossing emphasizes the need of introduction of motors and reducers of a new type in it to minimize its size, reduce costs, improve the operation reliability of the crossing signal system, and thereby to improve the safety of railway transport in general. The control scheme of the railway level crossing remains the same, which facilitates the renovation stages and it does not require additional training of maintenance personnel. It is proposed to minimize the size and weight of the level crossing due to the introduction of DC motors with permanent magnets, which are cheaper and more reliable in operation against existing engines such as SL-571k and AIR 56V4B43. Also it is possible to reduce the weight of the level crossing due to the introduction of a planetary gear, which is more compact, it has reduced load on the shafts of the gear and the teeth of the wheels, increased gear ratio, reduced noise and longer life. The scientific basis of the introduction of direct current motors with permanent magnets and the planetary gear of the railway level crossing is given. A technique is developed to determine the primary parameters of the electric circuit for the chosen type motor, its working and mechanical characteristics. The mathematical model of the dc motor with permanent magnets has been improved due to the introduction of the methodology for definition the ratio of electric and magnetic constants according to the specified passport data, of the primary parameters and its working and mechanical characteristics, which was the scientific basis for the justification for diagnosing the engines of level crossing. It is allowed us to change the planned preventive maintenance technology on the maintenance according to the state of the objects: level crossing of railways of Ukraine and UIS countries in further.
Published Version
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