Braking System for Bogie Successive Braking of Freight Cars

Abstract

Brake leverages with the location of brake cylinders on bogies have a number of advantages as compared with common circuits. Domestic braking systems are presented mainly by design improvements and inventions. In this connection the development of the prototype of such a system for domestic standard bogies corresponding to the requirements and conditions of Russian railways is urgent. At that the application of domestic brake devices in such systems is preferable. 
 The aim of this work is a choice of the optimum design for a unified leverage for two-axial bogies of type 2 and 3 (RSS 9246-2013) with the location of cylinders 670V on a bogie, and also a development of the circuit for its adjustment while operation. 
 On the basis of the regulations for a standard computation of a brake there is chosen an optimum circuit of the brake leverage. With the aid of 3D thoroughly developed model of a brake system located directly on a bogie taking into account a design outline of bogie elements, the analysis of bogie units geometry is carried out and all intermediate leverage, separators and brake beams positions are defined which allowed obtaining the sufficiently accurate values of assembly dimensions at different wear stages of a wheel tread and a brake shoe. 
 There is chosen an optimum brake system for two-axial bogies of type 2 and type 3 (RSS 9246-2013) with the location of cylinders 670V on a bogie. The regulating circuits and a table of assembly dimensions of the brake system during operation for a brake shoe 60±4mm thick are developed. An aggregate stock and screw travel of a brake cylinder regulator during operation without taking into account elastic deformation of a system is chosen. The considered leverage system design is offered as a prototype for the brake system design for freight cars.

Influence of structural solutions of an improved brake cylinder of a freight car of railway transport on its load in operation

“…A promising design of the brake system for delivery braking of freight cars is reflected in the publication [10]. The optimal design of a unified linkage for two-axle bogies with 670 V cylinders placed on the bogie was chosen.…”

“…It is important to say that the authors did not take into account the effect of loads from the brake cylinder rod on the elements of tribotechnical pairs. The analysis of literary sources [6][7][8][9][10][11][12][13] allows to conclude that the issues of improving the brake cylinders of freight cars to improve the efficiency of the brakes have not yet been given due attention. Therefore, there is a need for appropriate research in this direction.…”

Probability and Statistical Model of Wearing of Brake Pads of Freight Cars

“…У дослідженнях [11,21], присвячених конструктивним змінам ГВП, залишаються невирішеними проблеми клинодуального зносу колодок через те, що їх розробники пропонували створювати різноманітні допоміжні пристрої протидії силам, які нахиляють колодки до впирання в колеса, тільки на підставі кінетостатичного аналізу механізму ГВП [15]. Однак, як показує практика, такий підхід пов'язаний з ускладненням конструкції ГВП, збільшенням її собівартості та трудомісткості виготовлення й ремонту.…”

Forecasting of wear of pads of modernized brake system devices of bogies of freight cars using ARIMA models

“…In the studies [15,16] dedicated to the design changes of the BR, there are unresolved problems of tapered dual wear of the pads due to the fact that their developers proposed to create various auxiliary devices to counteract forces that tilt the pads to the wheel only on the basis of kinetostatic analysis of the BR mechanism [17]. However, as practice shows, this approach is associated with the extra complexity of the BR design, extra cost and labour intensity of manufacturing and repair.…”