scholarly journals Comparison of cast-iron and composite brake pads with cast-iron inserts for rolling stock of railways

2021 ◽  
Vol 29 (2) ◽  
pp. 80-89 ◽  
Author(s):  
V.L. Mazur ◽  
◽  
V.L. Naidek ◽  
Ye.S. Popov ◽  
◽  
...  
Keyword(s):  
Cast Iron ◽  
Rolling Stock ◽  
Brake Pads

scholarly journals Performance quality analysis of brake iron and composite pads for railway rolling composition

2021 ◽  
pp. 27-37
Author(s):  
E. S. Popov ◽  
O. I. Shinsky
Keyword(s):  
Cast Iron ◽  
Composite Materials ◽  
Carbon Black ◽  
Quality Analysis ◽  
Rolling Stock ◽  
Brake Pads ◽  
Performance Quality ◽  
And Performance ◽  
Railway Rolling Stock

The requirements for the quality and performance of the brake pads of railway rolling stock made of various materials are analyzed. The advantages of cast iron brake pads produced at foundries are shown. The disadvantages of brake pads made of composite materials based on rubber, asbestos, barite, carbon black and other components are noted. Ways to improve standards, specifications and other documentation for these products are proposed.

EVALUATION OF THE HOMOGENEITY OF THE WORKING SURFACE OF CAST IRON BRAKE DISCS

Tribologia ◽  
2017 ◽  
Vol 276 (6) ◽  
pp. 33-37
Author(s):  
Grzegorz KINAL ◽  
Marta PACZKOWSKA
Keyword(s):  
Cast Iron ◽  
Corrosive Wear ◽  
Point Of View ◽  
Brake Disc ◽  
Braking Performance ◽  
Brake Pads ◽  
Braking System ◽  
Brake Discs ◽  
The One ◽  
Friction Surfaces

This article deals with the one of the most important elements of modern braking systems, which is a brake disc. A brake disc is the one of more stressed parts of the braking system, and its quality and design largely determine the braking performance of the vehicle. The article describes the technology of manufacturing disc brake pads that is important from the point of view of the wear processes occurring between two friction surfaces: the brake disc and the brake pad lining. The research of the cast iron ventilated brake disc surface measured the values of the selected roughness parameters at this site. In the context of measurements, it was also determined to be able to maintain a certain value of selected geometric parameters at a given location for the group of brake discs tested of a specific type and manufactured by a particular manufacturer. The work was carried out in the aspect of the research to create a surface layer to protect the brake discs from the effects of corrosive wear.

Research on Composite Materials Used for Brake Shoes Manufacture

2016 ◽  
Vol 254 ◽  
pp. 207-211 ◽  
Author(s):  
Erika Popa ◽  
Liviu Pascu ◽  
Ana Socalici ◽  
Marius Ardelean
Keyword(s):  
Composite Material ◽  
Cast Iron ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Contact Zone ◽  
Laboratory Experiments ◽  
Rolling Stock ◽  
Brake Shoe ◽  
Materials Used

The paper relates laboratory experiments in order to obtain a composite material used for brake shoe manufacture. Regarding the testing materials were processed 38 samples. The percentage and composition of materials are: 15-45% novolac, 1,5-10% hexametyltetramin, 0-8% sulfur, 0-15% carbon fiber, 0-20% graphite, 0-25% aluminum, 15-28% brass and 0-40% rubber. The evolution of tribological and temperature parameters were analyzed in the contact zone tribological testing disk - split pin method. The composite material has the role to replace the classic material (cast iron) used in brake shoes composition in order to reduce the noise caused by rolling stock.

scholarly journals ACCOUNTING FOR THE ELASTIC COMPONENT OF THE STROKE OF THE ROD IN THE BRAKE SYSTEM OF A TRUCK OF A FREIGHT CAR WITH A CYLINDER 670B

2019 ◽  
Vol 2019 (8) ◽  
pp. 64-70
Author(s):  
Владимир Синицын ◽  
Vladimir Sinicyn ◽  
Владимир Кобищанов ◽  
Vladimir Kobishchanov
Keyword(s):  
Elastic Deformation ◽  
Brake System ◽  
Rolling Stock ◽  
Maximum Width ◽  
Brake Pads ◽  
Railway Freight ◽  
Freight Car ◽  
Definition Of ◽  
Executive Mechanism ◽  
Type 3

The application of braking systems with the lo-cation of the executive mechanism directly upon a bogie is a promising trend in domestic brake production and freight car manufacturing on the whole. In the paper a common circuit of a braking rod leverage with the location of cylinders 670V on the bogie of two-axle type 2 and type 3 (RSS 9246-2013) is considered. The investigation carried out in the work is a continuation of works connected with the updating of a braking system developed earlier. The aim of the work consists in the definition of cylinder rod outlet limits taking into account elastic deformation of all elements of leverage in accordance with the procedure developed and appraised earlier and also the definition of maximum possible thickness of a brake pad used for this circuit in operation. The rod outlet limits obtained will be standard as system transmission ratio is unified, and an elastic constituent will have minimum deviations from the value obtained and depend upon a specific execution of elements. In this investigation there is used a 3D brake system model developed thoroughly that allows obtaining an elastic deformation value precise enough. Furthermore, data obtained allow defining a maximum operation outlet of rod of the braking cylinder 670V in the system analyzed during car motion on a long steep slope. On the basis of the investigations carried out there are defined the limits of rod outlet (35…47mm) for the developed common brake system with cylinders 670V that allows using brake pads of maximum width (65+5mm) used in railway freight rolling-stock of the RF. The maximum operation value of rod outlet is obtained during car motion on a steep long slope (63mm) which does not exceed a working stroke of a cylinder (100mm).

scholarly journals EXPERIMENTAL INVESTIGATION & ANALYSIS OF HEA TRANSFER CHARACTERISTICS IN AUTOMOTIVE MMC DISC BRAKE UNDER STEADY STATE AND DYNAMIC CONDITIONS

2021 ◽  
Author(s):  
Agarwal A ◽  
◽  
Molwane O.B ◽  
Letsatsi M.T ◽  
◽  
...  
Keyword(s):  
Heat Transfer ◽  
Cast Iron ◽  
Steady State ◽  
Dynamic Condition ◽  
Heat Transfer Characteristics ◽  
Dynamic Conditions ◽  
Brake Pads ◽  
Disk Brake ◽  
Transfer Characteristics ◽  
Air Speed

During braking process, the kinetic energy of vehicle reduces and gets converted in thermal energy due to friction between disk and brake pads. The disk brake is used to retard the motion of vehicle by pressing brake pads against disk rotors. The frequent braking or panic braking results in overheating of brake disks which may result in brake fade. It is therefore essential to test newer materials which are more effective and possess better heat transfer characteristics than conventional cast iron material. The current research investigates the application of Al MMC material for ATV disk brake using experimental and numerical techniques. The numerical analysis is conducted on both conventional cast iron and Al MMC disk brake under steady state conditions and dynamic conditions. The dynamic condition testing involved testing of disk brake with externally flowing air at 2.5m/s and 5m/s using techniques of Computational Fluid Dynamics (CFD). The CAD model of ATV disk brake is developed in Creo design software and CFD analysis is conducted using ANSYS CFX. The turbulence model used for analysis is RNG k-epsilon. The temperature and heat flux are determined for disk brake under steady state and dynamic conditions. The results have shown that disk brake made from Al MMC possess better heat transfer characteristics as compared to conventional cast iron and cooling time also reduces with increase in external air speed.

Evaluation of РА-3 rail bus pneumatic brake effi ciency

Innotrans ◽  
2020 ◽  
pp. 54-56
Author(s):  
Yaroslav D. Podlesnikov ◽  
◽  
Anatoly G. Silyuta ◽  
Keyword(s):  
Path Length ◽  
Rolling Stock ◽  
Process Safety ◽  
Brake Pads ◽  
Braking System ◽  
Effi Ciency ◽  
Transportation Process ◽  
Full Stop ◽  
Efficiency And Reliability

Braking system is a very important element of any rolling stock unit, as transportation process safety depends on its efficiency and reliability. Rail buses represent development of diesel trains intended for passenger service on non-electrified track sections. A sudden obstacle on the track requires immediate full stop of the rolling stock, it is urgent to have effective braking which provides the least brake path length. The paper presents results of brake path length calculation for РА-3 rail bus in two-car version with iron and composite brake pads.

New Solutions in Choice of Material and Design of Brake Shoes Required by Railroad Applications

2005 ◽  
Author(s):  
L. A. Vukolov ◽  
A. I. Voronchikhin
Keyword(s):  
Cast Iron ◽  
Sintered Material ◽  
Wheel Running ◽  
Rolling Stock ◽  
Transverse Cracks ◽  
Thermal Cracks ◽  
Field Service ◽  
Railroad Applications ◽  
Sintered Materials ◽  
Railway Rolling Stock

The results of interaction of cast iron and composite brake shoes against wheel treads on dynamometer during carry out certificate tests of brake shoes are examined. It has been established that cast iron brake shoes are more aggressive against the wheel running surface. They have inclination to emerge of transverse cracks in tread. On the contrary the composite brake shoes and sintered materials too did not cause the formation of the thermal cracks in the wheel tread owing to more low temperatures rise in friction contact layers. Like this use of composite and sintered material brake shoes in field service on Railway Rolling Stock is more preferable.

scholarly journals Experiments on composites meant for making brake pads for the rolling stock

2017 ◽  
Vol 163 ◽  
pp. 012003
Author(s):  
A Socalici ◽  
L Pascu ◽  
E Ardelean ◽  
V Putan
Keyword(s):  
Rolling Stock ◽  
Brake Pads

scholarly journals Laboratory Researches Regarding Wear of the Composite Materials for Making Brake Shoes

2017 ◽  
Vol 54 (2) ◽  
pp. 203-206 ◽  
Author(s):  
Erika Ardelean ◽  
Ana Socalici ◽  
Liviu Pascu ◽  
Vasile Putan ◽  
Teodor Heput
Keyword(s):  
Composite Material ◽  
Cast Iron ◽  
Composite Materials ◽  
Experimental Test ◽  
Standard Sample ◽  
Rolling Stock ◽  
Laboratory Conditions

The paper presents the results of the experiments on obtaining a composite material to be used in manufacturing brake shoes for the rolling stock. The aim was to replace the classical material used at present for the manufacturing of brake shoes: cast iron with a specially designed composite material. Six recipes have been tested and compared to a standard sample made of phosphorous cast iron. The wear trials carried out in laboratory conditions on the experimental test rods have led to results that entitle further experiments that implies the manufacturing of brake shoes made of the composite material in question.

INVESTIGATION OF TEMPERATURE OF BRAKE PADS WITH DIFFERENT EXTENT OF WEAR IN FRICTIONAL BRAKING

2020 ◽  
pp. 27-34
Author(s):  
P. Yu. Ivanov ◽  
◽  
A. M. Khudonogov ◽  
E. Yu. Dulskiy ◽  
A. A. Korsun ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Flow Distribution ◽  
Rolling Stock ◽  
Finite Element Models ◽  
Brake Pads ◽  
Coefficient Increase ◽  
Engineering Drawings ◽  
Freight Car ◽  
Full Stop

The issue of railway rolling stock brake pad heating is examined under frictional braking within a freight car with unilateral push, equipped with castiron brake pads. Foreign and domestic experience of studies of heat cycles caused by friction has been examined, mechanism of heat release in the contact zone between a pad and wheel during braking with consideration of a heat flow distribution coefficient is described, mathematical modeling choice as a way to refine temperature measurements in the process of experimental studies is grounded, the results of estimated determination of the thermal flow affecting the pad in braking of a loaded freight car weighing 93 ts with 5 ts push upon the axle from 60 km/h to full stop are shown. Dynamics of thermal energy change emitting in frictional braking with consideration of wheel rotation decelerating speed and friction coefficient increase is emulated. Finite element models of pads with even wear, wedgelike wear and with no wear having geometry of relevant engineering drawings are described. The results of investigation of heating of brake pads with different wear types in the process of braking until full stop are given.

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