Testing of composite break blocks of the type ll
- Daniel KALINČÁK
- Kategoria: Transport i spedycja
The aim of this paper is to compare the composite brake block LL with traditional cast iron type P used largely for freight wagons. Properties of friction materials of aforesaid block types have a significant impact on the braking of railway vehicles. The result is the evaluation and comparison of friction characteristics on the basis of braking distances for various speeds and weight of the wagon.
TESTOWANIA KOMPOZYTOWYCH KLOCKÓW TYP LL
Celem niniejszej pracy jest porównanie kompozytowych klocków hamulcowych typu LL z tradycyjnymi klockami z żeliwa typu P stosowanych głównie do wagonów towarowych.
Właściwości materiałów ciernych klocków mają istotny wpływ na hamowanie pojazdów szynowych. Resultatem jest ocena i porównanie cech tarcia na podstawie drogi hamowania dla różnych prędkości i mas wagonu.
1. INTRODUCTION
The claims on the overall operational reliability of railway vehicles rise with the increase in the number of kilometres newly reconstructed tracks and with the increasing of operating speeds at the new and upgraded vehicles. The basic condition for safe operation of these vehicles is reliable and effective braking system. Brake blocks are the most important part of the braking system, which aim is to create a braking effect by friction.
Cast iron is the most common friction material of the block brakes used for freight wagons. It performs with its properties the requirements to operate vehicles only to a certain speed. Declining value of the blocks friction coefficient advert to an application inadvisability of the cast iron at higher speeds, since they induce an undesirable prolongation of the stopping distance and the increase of the brake blocks wear. This unwelcome fact as well as high level of noise during the braking evoked an interest in the development and manufacture of new friction materials. Smoother surface of the wheel tread, better operating properties in braking and lower values of noise emissions can be
Ing. Jozef Hriňák, University of Žilina, Faculty of Mechanical Engineering, Department of Transport and
Handling Machines, Univerzitná 1, 010 26 Žilina, Slovakia. Phone: +421 41 513 2679. (...)
Celem niniejszej pracy jest porównanie kompozytowych klocków hamulcowych typu LL z tradycyjnymi klockami z żeliwa typu P stosowanych głównie do wagonów towarowych.
Właściwości materiałów ciernych klocków mają istotny wpływ na hamowanie pojazdów szynowych. Resultatem jest ocena i porównanie cech tarcia na podstawie drogi hamowania dla różnych prędkości i mas wagonu.
1. INTRODUCTION
The claims on the overall operational reliability of railway vehicles rise with the increase in the number of kilometres newly reconstructed tracks and with the increasing of operating speeds at the new and upgraded vehicles. The basic condition for safe operation of these vehicles is reliable and effective braking system. Brake blocks are the most important part of the braking system, which aim is to create a braking effect by friction.
Cast iron is the most common friction material of the block brakes used for freight wagons. It performs with its properties the requirements to operate vehicles only to a certain speed. Declining value of the blocks friction coefficient advert to an application inadvisability of the cast iron at higher speeds, since they induce an undesirable prolongation of the stopping distance and the increase of the brake blocks wear. This unwelcome fact as well as high level of noise during the braking evoked an interest in the development and manufacture of new friction materials. Smoother surface of the wheel tread, better operating properties in braking and lower values of noise emissions can be
Ing. Jozef Hriňák, University of Žilina, Faculty of Mechanical Engineering, Department of Transport and
Handling Machines, Univerzitná 1, 010 26 Žilina, Slovakia. Phone: +421 41 513 2679. (...)
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Źródło: Czasopismo Logistyka