Обгрунтування доцільності модернізації буксових вузлів вантажних вагонів

Abstract

UA: У статті викладено розрахункові результати економічного обґрунтування доцільності модернізації вантажних вагонів буксовими вузлами удосконаленої конструкції. Проаналізовано чинники, що впливають на величину додаткових капітальних витрат на здійснення модернізації вагонів удосконаленими буксовими вузлами. Розрахунок річних експлуатаційних витрат на роботу вагону адаптовано до умов конкретного маршруту Харків-Київ.

EN: This article presents the results of a study evaluating the effectiveness of modernizing freight cars with improved axleboxes units. The use of this new axlebox design reduces the tare weight of gondola cars, thereby reducing freight transportation costs. A program for the modernization of the gondola car fleet has been defined. It is envisaged that gondola cars under construction will be equipped with an improved axle box unit. It is also planned to partially modernize gondola cars already in operation during their major overhaul. Additional capital investment in modernizing the gondola fleet is determined by the combined costs of research and development, as well as the cost of refitting cars in service. For newly built cars, the upgrade to an improved axlebox unit is included in the purchase price of the car. The factors influencing the amount of additional capital expenditures for the modernization of cars with improved axlebox units are analyzed. The calculation of annual operating costs for the freight car was adapted to the specific conditions of the Kharkiv-Kyiv route. The key principles of traction calculations for the actual section profile of the Southern Railway regional branch of Ukrzaliznytsia, with diesel and electric locomotive traction, were used. The initial data for the traction calculations include the section profile characteristics (0/00), technical speed (km/h), freight train weight (gross tons), the number of gondola cars in the freight train, and scales. The specific fuel and electricity consumption per 10,000 tonne-kilometers gross for a train with gondola cars was determined. The weight of the new version of the axle box unit is less compared to the basic version. This results in a smaller tare weight for the gondola car and lower operating costs for freight transportation. The unit consumption rate method was used to calculate the net cost of 1,000 tonne-kilometers for the gondola car variants. Annual operating cost savings due to reduced tare weight per gondola car exceed UAH 3,500.