DEFINITION OF THE DUAL WEAR FEATURES OF THE BRAKE SHOES OF FREIGHT CARS
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2019, Vol 183, Issue 183
Abstract
The work identifies the special character of the two-plane turning profile of brake pad wear, which takes place in a large number of brakes of modern freight wagons, for which the phenomenon was first discovered, and the notion of dual frictional wear of brake pads was introduced. A new scientific approach and a method of research of a problem connected with dual frictional wear of brake pads are presented. A physical parameter is introduced as well as a mathematical expression of the duality coefficient of wear of the brake pad, which will be used in further studies and braking calculations. The stages of formation of wear on the working surfaces of brake pads are shown, which arises as a result of the complex formation of dual wear on the dynamics of the trolley on the inequalities of the rail track (preferably without braking). It is proved that the part of the working mass of the pads, which works useful during braking determines their resource, until the time, until it exhausts its stock of the weight of the brake pad having already dual wear. In order to study the dual wear of brake pads in comparison with the known monistic (monopole), statistical material was collected by measuring in three sections of the thickness of the pads for different types of freight wagons with set running rises under operating conditions. The results of the measurements were processed in the specialized computer program "STATISTIKA 10" and graphical indicators were obtained, confirming the results of theoretical studies. The graph-analytical algorithm for two planes of dual wear of the pad has been tested on which the vector of the reaction of the reaction from the wheel to the brake block is concentrated. The algorithm allows to determine the magnitude and direction of the reaction of the reaction and to perform the analysis of power factors that determine the upper mopping of brake pads and dual frictional wear. The obtained equations allow at the appropriate stage to evaluate the wear and its impact on the stress-deformed state of brake pads, which allow to further take into account the contact strength at various thicknesses of the brake pads of freight cars.
Authors and Affiliations
Vasyl Ravlyuk
Keywords
Related Articles
- EP ID EP658497
- DOI -
- Views 84
- Downloads 0
ANALYSIS OF PARTICLE MOTION DRY MIXES FREE WORKSPACE MIXERS AFTER LEAVING THE BLADES OF THEIR WORKERS
Increased consumption of dry mixes requires producers of equipment for factories producing dry mortar to enter the market with new designs and proposals that ensure high quality and reliability of the mechanical equipmen...
FORMING OF SPATIAL INFLEXIBILITY OF RAIL SUPPORTS AT RAILROAD TIES SB-3-0 AND FASTENING КPP-5
Аt action on the rail of forces vertical and lateral there is its bend in a plane vertical and horizontal and its twisting. The reactions of the rail fastening and reactive croutni vertical and horizontal are the constit...
THE EFFICIENCY OF PLASTICIZING SURFACTANTS IN ALKALI-ACTIVATED CEMENT MORTARS AND CONCRETES
Application of alkali-activated cements (AAC) allows to provide high quality functional and durable mortars and concretes in the view of efficient application of raw materials and energy supplies. There are five types of...
EXPERIENCE GAINED DURING EXAMINATION OF ELECTROMAGNETIC COMPATIBILITY BETWEEN ROLLING STOCK AND AXLE COUNTERS
Axle counters are more and more often applied in train detection systems. The wheel sensor is a main part of each axle counter system. In parallel, more and more complex railway vehicles, especially traction ones, are a...
DESCRIPTION OF WATER RESISTANT GYPSUM-CONTAINING COMPOSITION WITH A COMBINED CRITERIA
This article discusses the characteristics of the water resistance of composite materials based on gypsum-cement-ash binders. The example of the relationship of strength characteristics demonstrates that the classical s...