Design of an optimised wheel profile for rail vehicles operating on. Manual for standards and specifications for railway stations june 2009. Contaminants, which refer to foreign substances applied both intentionally and unintentionally the wheel to rail interface, can make wheelrail adhesion either too high or too low and to difficult predict. Wheels are cast or forged and are heattreated to have a. The vehicle speed above which hunting typically occurs for a given.
These trends have changed the major wheel rim damage from wear to fatigue. Continuous welded rail dbfo design, build, finance, and operate dot. Design and dynamic analysis of locomotive wheel axle. Design aspects of a motorised travelling tripper saurabh rane, subhashis dey. Wheel to rail friction is mandatory to calculate the resistance. The outer circumferential surface of the rim, which contacts the rail, is tread, and the projected part is flange. Government of india for bestowing the confidence in sgi for developing manual for standards and specifications for railways stations to be used for development of stations.
They include a hub, wherein an axle is inserted, a rim that. It is well known that the shape employed to design both the wheel. An inverse shape design method for railway wheel profiles. Our rail technologies group provides innovative solutions for a variety of wheelrail interface challenges that include hirail, onboard. Chapter track structure design table of contents 4. The criteria account for stability of wheelset, cost efficiency, minimum wear of wheels and. The size and type of crane rail depends on the size and resulting wheel loads of the rmg crane.
The regimes are described in terms of wear mechanism as well as wear rate. The two fundamental components in maintenance of the wheelrail interface are control of friction and control of the wheel and rail profiles. Bogie design steps layout calculations layout drawing interface with carbody gauge, wheel base and wheel dia customer proof layout calculations frequencies of supensions bogie frame tilting coefficient derailment coefficient exact calculations for springs, fasteners, brakes. Rail analysis and design weight and section selection many rail weights and sections have evolved by the efforts of various designers. Problem of wheel rail profiles design exists for many years and different approaches have been developed to obtain satisfactory wheel rail profile combinations. The first method caf1 for computer aided wheel profile design was developed in 2001 and published in 2003 shen et al. Light rail track design handbook list of figures figure 4. Wheel bearings are lifetimelubricated for minimum maintenance and maximum life. A guide to permanent way design permanent way institution. Design technologies for railway wheels and future prospects. Materials used for wheels on rolling stock railway research. So how do the left wheels travels more than the right wheels without a. Ttc wri optimization project background treat the issues as being related instead of treating each separately. Wheel rail profiles and vehicle steering behavior are such that the curve can be considered mild the contact area at each wheel tread low rail interface is approximately circular, with a typical radius of 7mm.
Available with a double flange cylindrical tread wheel designed for a maximum runway rail of 40 lbs. Design of an optimised wheel profile for rail vehicles. It is possible to find an optimal combination of wheel and rail profile when dealing with closed railway system, i. Optimal design of wheel profile for railway vehicles. These failures may cause damage to rails, damage to train suspensions and, in some cases, serious derailment of the train. Create 3d model of the existing model of rail wheel axle from the 2d drawings. Consider all wheels in a truck and proximity of adjacent cars. However fundamental differences in the track and wheel design are important, especially where trams or light railways and trains have to share a section of track, as sometimes happens in congested areas. Design guide for overhead cranes brighthub engineering. A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks.
These design factors may not be representative of the loading experienced on the rail transit. Optimisation of a railway vehicletrack system is a complex process. Putting the two together aapa facilities engineering seminar january 2006 jacksonville, florida. The paper presents a procedure for optimal design of a wheel profile based on geometrical wheelrail contact characteristics such as the rolling radii difference rrd. Maintenance benefits reduces labour costs extends repair intervals.
In practice the crane flattens the rail head quite quickly. The procedure uses optimality criteria based on an rrd function. The friction between wheel flanges and rail will result into resistance to the tune of 10% of tripper weight in. Also available with bronze wheels for sparkresistant applications. Wheel wear is closely related to conditions of force and slip in the wheelrail contact. Aisc steel design guide number 7, 2004 design of a runway girder crane capacity 50 tons cmaa class d bridge weight 90. Criteria for design evolution safety against derailment coefficient. Apta prmrp009, recommended practice for new truck design process. Design of an optimised wheel profile for rail vehicles operating on two track gauges. Part one provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as stateoftheart research and emerging technologies related to the wheel rail interface and its management.
The trains left wheels now have to travel more than the right wheels because at the turn the track on the left is longer. Crane rail selection bexon crane rail official partner of. Simulation of wheel and rail profile evolution diva portal. Railway wheel is assembly of two wheels fixed to the axle by interference fit and. Also, efforts have been made to optimize wheel and rail design to improve the performance and reduce the cost. Section 8 guidelines for guide rail design and median barriers.
Today, very different design principles are applied. Basis of calculation for crane rail wheels din 15 070 fem 1. Symbol and unit symbol unit description explanation c1 material coefficient values in accordance with table 2 c2 speed coefficient values in accordance with table 3a and 3b c3 operating time coefficient values in accordance with table 4 d1 mm travelling wheel diameter running surface diameter. One of these is a traction motor design that directly powers the wheel and acts as wheel support and guidance without any gearbox or coupling components. They include a hub, wherein an axle is inserted, a rim that contacts the rail, and a web that unites the two parts. However, with all the poor adhesion lately i cant help but wonder whether alternatives might be. Thus better understanding of wheelrail interfaces is critical to improving the capacity, reliability and safety of the railway system. Section 8 guidelines for guide rail design and median barriers 8. A solid wheel of a railway vehicle hereinafter wheel consists of three parts, as shown in fig. Quantification of rail transit wheel loads and development. This book is a onestop reference for railway engineering practitioners and academic researchers.
A rolling component is typically pushed onto an axle and mounted directly on a railway carriage or locomotive, or indirectly on a bogie in the uk, also called a truck in north america. I expect a lot of thought has gone into it over the years and that it remains the correct design to use. Crane rail selection the national design standards typically call for the radii at the edge of the rail head to be subtracted from the total width. Introduction to railroad track structural design don uzarski, ph. Pdf this article sets out an optimum synthesis methodology for wheel profiles of railway vehicles in order to secure good dynamic behaviour with. Designs with connected wheelsets and wheelsets connected to the vehicle body are based on lever systems that act on the wheelsets via the. The web thickness of the corrugated wheel is approximately 30% less than that of a usual web wheel. Abstract industries and factories utilise conveyor systems for transport of goods, bulk materials and manufactured parts from place to. The designs of components of railways should befor infinite life based on the fatigue limit of the material. E is designed for the maximum speed and not all trains run at this speed applying a lower cant will result in a force between the high wheel and the rail this guides the train around the curve reduces contact fatigue. The geometry of wheelrail contact is a key feature in resolving the dynamics of a rail vehicle. Select design wheel load based on most common, heaviest car and desired track speed. This chapter explains the importance of urban design in the context of high speed rail and the context in which this report should be used.
Railwheel lubrications applies by automaticly or manually. Crane rail selection bexon crane rail official partner. Perform design calculations of rail wheel axle model. Rail and wheel wear can be reduced dramatically by proper lubrication. The information in this section is intended to serve as guidelines that will assist the.
The aim of these designs is to reduce wear and noise caused by low steering forces. The rail steel can be assumed to have a shear yield strength of k70 ksi. Toprunning single drive kit for crane capacities to 5 tons, and spans to 36 feet. Appropriate design of the wheelrail interface, with attention to these factors, can greatly reduce maintenance requirements. Lr082010 75 basis of calculation for crane rail wheels din 15 070 fem 1. Continuous welded rail dbfo design, build, finance, and operate dot department of telecommunications. There is a practical need for light rail bridges to carry both light rail train and regular highway traffic loads. A new cae procedure for railway wheel tribological design. Design guidelines for bridges subjected to light rail. Specify section and weight of rail and width of crossing. Installation of rmg cranes at intermodal rail yard louis a.
This part of iso 16881 establishes requirements and gives guidance and design rules that reflect the present state of the art in the field of crane machine design. The outside rotor directly powers the rubber springsuspended wheel tyre. That means they have a varying diameter at different points of contact. In addition, lubrication can help in saving energy and reducing noise. In this paper, a method for designing wheelrail profiles is presented based on the rolling radius difference. The outer circumferential surface of the rim, which con. Dec 11, 20 i was pondering earlier today how did we arrive at the current rail and wheel design. The design of the crane rail foundation is a function of the supporting soil and the. I was pondering earlier today how did we arrive at the current rail and wheel design. The rules given represent good design practice that will ensure fulfilment of essential safety requirements and adequate service life of components.
The article describes the basic principles of operation of the overhead cranes and the design selection criteria for the various components of the overhead crane. Materials used for wheels on rolling stock katrin madler, manfred bannasch deutsche bahn ag, technical centre, brandenburgkirchmoser, germany 1 introduction in the contact area between the wheel and the rail, the materials are used in those components encounter the greatest demands. Drive motors are nema design 30minute rated tenv with class f. The rules given represent good design practice that will ensure fulfilment of essential safety requirements and. Corrugated wheel is one of the notable wheels when discussing the web design. This means tripper tends to steeroff rails, which is prevented by flanges. Train wheels are not as simple as they seem awesci. Proposed procedure for determining wheel and wheelset dimensions for large scale trains introduction in order to allow interoperation of equipment on multiple tracks a series of standard dimensions have been developed that apply to the design, production, and inspection of wheels and wheelsets two wheels and an axle. Au tomotive and industrial applications, particular in railroads, rapidly developed, and the rest is history. Design guidelines for bridges subjected to light rail transit.
Many of the engineering problems of particular importance to railways arise at interfaces and the safetycritical role of the wheelrail interface is widely acknowledged. Three wear regimes for wheel materials have been defined as a result of laboratory twin disc experiments 5, 6, mild, severe and catastrophic. As the wheelrail contact is an open system, the adhesion between the wheel and rail is inevitably affected by contaminants. Cxt concrete ties manufactures high performance concrete ties for use in heavy haul, transit and industrial rail operations. Modern light rail is a relatively new innovation which combines aspects of those two modes of transport. Sinceaccidents due to fracture of railwheel affects the. To reduce the forces between rails and wheels, several radial steering design principles for wheelsets are applied. Such a requirement is currently not implemented in design of light rail structures.
Implementations of newly developed wheel and rail profile. The computer program of the method generates the wheel profile directly based on the rail profile and contact angle function assuming the zero roll angle of wheelset. Pdf design of an optimised wheel profile for rail vehicles. Wheel wear is closely related to conditions of force and slip in the wheel rail contact. Select a track modulus, u or k, based on desired design deflection 3. Many rail transit track component design guidelines use historical wheel loads and loading factors that were derived from freight railroad design practices.
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