''Design and Modification of Vacuum Braking System”
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The Role of Vaccum Braking System
INTERNATIONAL JOURNAL OF INFORMATION AND COMPUTING SCIENCE ISSN NO: 0972-1347 The Role of Vaccum Braking System 1 2 3 Author :- Ankit Yadav , Aniket Mahajan , Gagandeep singh 1,2,3 Depa rtm e n t of Mec ha nic a l Engineering Chan dig a rh University, Moha li Abstract The vacuum brake was made for a long time, utilized instead of the pneumatic brake system. Pneumatic brake mechanisms take compressed air as the power used to drive disc or drum on to wheels. The vacuum braking mechanism is controlled through a brake pipe. In which a brake valve in the driver's side with braking mechanism in each wheel of vehicle. A vacuum is made in the pipe by and enjector. The enjector gives air weight from the brake pipe to make the vacuum utilizing steam on a steam train, or an exhauster utilizing electric power. With no vacuum the brake is completely connected. The vacuum in the brake pipe is made and kept up by an engine driven exhauster. The exhauster has two velocities, rapid and low speed. The fast is changed in to make a vacuum and along these lines discharge the brakes. Ease back speed is utilized to keep the vacuum at the expected level to keep up brake discharge. Vacuum against little holes in the brake pipe is kept up by it. Key Words :- Vacuum brake, pneumatic brake, exhauster, atmospheric pressure, steam locomotive INTRODUCTION The vacuum brake was, for a long time, utilized instead of the air powered brake as the standard, safeguard, prepare brake utilized by railroads. -
Determination of Forces in the Elements of the Brake Rigging of Bogies of Freight Cars
E3S Web of Conferences 166, 07004 (2020) https://doi.org/10.1051/e3sconf/202016607004 ICSF 2020 Determination of forces in the elements of the brake rigging of bogies of freight cars İsrail Elyazov1, Vasyl Ravlyuk2,*, Andriy Rybin2, and Vitalii Hrebeniuk2 1Azerbaijan Technical University, Department of Railway Transport Operation, 25 H. Javid Ave., Baku, Az 1073, Azerbaijan 2Ukrainian State University of Railway Transport, Department of Cars, 7 Feuerbach Sq., Kharkov, 61050, Ukraine Abstract. The article presents the results of studies the purpose of which was solving the problem of deceleration of abnormal wear of brake pads in freight cars of Ukrzaliznytsia JSC. In the studies, the design schemes of brake rigging during braking were considered theoretically. Particular attention was paid to the determination of force loads acting in the rods of the rigging and the contact area of the brake pads with the rolling surfaces of the wheels during braking. Design analysis was performed to determine rational solutions from the point of view of determined force load of the rigging elements of the bogies during braking, in particular, taking into account the action of harmful torque caused by the movement of the bogie on inequalities “track joints”. Based on the conducted studies, it was decided to create a 2D generalized model diagram to determine reliable information on the operation of triangle brake rigging. 1 Introduction a basis to propose a generalized mathematical design model for which theoretical studies with corresponding Today, the main task of Ukrzaliznytsya JSC is increasing calculations have been performed. the volume of freight transportation, which requires increasing the weight and the speed of freight trains. -
A Review Paper on Drum Brake
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 18, Issue 3 Ser. II (May – June 2021), PP 48-51 www.iosrjournals.org A review paper on Drum brake Shubhendra Khapre1 Dr. Rajesh Metkar2 1Dept. of Mechanical Engg, GCOEA 2Prof. Dept. of Mechanical Engg, GCOEA Abstract: In the automobile, there is a most common and important factor is safety like, braking system, airbags, good suspension, good handling, and safe cornering, etc. from the all safety system the most important and critical system is a brake system. A brake is a mechanical device that inhibits motion. A drum brake is a brake that uses friction caused by a set of shoes or pads that press against a rotating drum-shaped part called a brake drum. In this paper, we have studied the brake shoe of motor vehicles. A brake shoe is the part of a braking system which carries the brake lining in the drum brakes used on automobile or brake block in train brakes and bicycle brakes. A brake shoe is also known as a device which can be slow down railroad cars. Keywords: Breaking system, Suspension, Brake shoe, Brake lining. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 02-06-2021 Date of Acceptance: 15-06-2021 --------------------------------------------------------------------------------------------------------------------------------------- I. Introduction We know about the braking system, there are few types of brakes like a drum brake, disc brake. The drum brake consists of backing plates, brake drum, wheel cylinder, brake pads, brake shoe, etc. The drum brake is used in various motor vehicles like passenger cars, lightweight trucks, most of the two-wheelers. -
Braking Systems in Railway Vehicles
International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 Vol. 4 Issue01,January-2015 Braking Systems in Railway Vehicles Rakesh Chandmal Sharma1 , Manish Dhingra2, Rajeev Kumar Pathak3 1Department of Mechanical Engineering, M. M. University, Mullana (Ambala) INDIA, 2Department of Mechanical Engineering, T. M. University, Moradabad INDIA 3Department of Mechanical Engg, Rakshpal Bahahur College of Engg. and Tech., Bareilly INDIA Abstract— Brake is an essential feature in order to retard and Researchers in the past have investigated different stop the railway vehicle within minimum possible time. This aspects of braking of railway vehicle. Bureika & Mikaliunas paper presents a discussion about the different braking [1] provided the calculations for Vehicle Braking Force systems used in railway vehicles. This paper also considers Fitted with UIC Air Brake for Passenger Trains, Wagon electrodynamic and electromagnetic braking of trains, which is Braking Force Fitted with a UIC Air Brake for Freight of particular importance in high-speed trains. The calculation Trains Wagon, Braking Distance. Liudvinavicius & Lingaitis for stopping distance for railway vehicle is provided in this [2] studied different features and related mathematics of study. electrodynamic braking in high‐speed trains. Vernersson [3] developed a dimensional finite element model of block and Keywords— Air brake; Straight air brake system; Automatic air brake system; Braking distance; Brake cylinder; Brake pipe; Vacuum brake; wheel, which was coupled through a contact interface for the Brake delay time purpose of control of heat generation and also the heat partitioning at block-wheel surface through thermal contact I. INTRODUCTION resistances. Influence of temperature in wheels and brake The brakes are used on the coaches of railway trains to block at rail tread braking was analyzed under brake rig enable deceleration, control acceleration (downhill) or to conditions in the later part of study by Vernersson [4]. -
Heavy Equipment Technician Hydraulic Brake Booster System Fundamentals and Service
Heavy Equipment Technician Hydraulic Brake Booster System Fundamentals and Service Hydraulic Brake Systems First Period Module 190103d Objectives 1. Identify common power assist braking systems. 2. Explain the principles of operation for vacuum brake booster systems. 3. Describe the diagnosis and repair procedures for vacuum brake booster systems. 4. Explain the principles of operation of air-over-hydraulic brake booster systems. Objectives 5. Describe the diagnosis and repair procedures for air-over-hydraulics brake booster systems. 6. Explain the principles of operation for hydraulic over hydraulic brake booster systems 7. Describe the diagnosis and repair procedures for hydraulic over hydraulic brake booster systems Objective One Identify common power assist braking systems. Hydraulic over Hydraulic (hydroboost) System Uses power steering pressure to assist in braking. Used with both gas and diesel engines. Vacuum / Atmospheric System Uses vacuum and atmospheric pressure for assist. Vacuum / Atmospheric System Vacuum Power Booster (Hydrovac) May have a remotely mounted unit (hydro-vac). Air-Over-Hydraulic Systems Air-Pak Booster System Uses pressurized air from a compressor. Usually remotely mounted. Air-Over-Hydraulic Systems Piston Head Air Assembly Chamber Hydraulic Cylinder Assembly Self-Locking Nuts The power cluster can be coupled directly to a master cylinder or to a hydraulic slave cylinder. Objective Two Explain the principles of operation for vacuum brake booster systems. Integral Power Brake Booster Vacuum Suspended Round shaped housing mounted to fire wall.. Master cylinder mounted on booster. Integral Power Brake Booster Vacuum Suspended Uses vacuum created in the engine and atmospheric pressure to move diaphragm Integral Power Brake Booster Vacuum Suspended Vacuum is low pressure and atmospheric pressure is high. -
Dynamic Testing of Innovative Railway Brake System for Freight Wagons
A NNALS of Faculty Engineering Hunedoara – International Journal of Engineering Tome XVII [2019] | Fascicule 1 [February] 1.Gligorche VRTANOSKI, 2.Tasko SMILESKI DYNAMIC TESTING OF INNOVATIVE RAILWAY BRAKE SYSTEM FOR FREIGHT WAGONS 1.Institute of Production Enginering and Management, Faculty of Mechanical Engineering, SS. Cyril and Methodius University in Skopje, Skopje, MACEDONIA 2.Faculty of Mechanical Engineering, SS. Cyril and Methodius University in Skopje, Skopje, MACEDONIA Abstract: In this paper is shown dynamic testing of innovative railway brake system for freight wagons. Brake systems have the essential function of decelerating and stopping of railway rolling stock. Because the brake systems are a subject of large static and dynamic loads in external conditions, lot of tests should be done. In this paper will be shown the way of conducting dynamic testing on the innovative railway brake system. Keywords: railway, dynamic, testing, brake, freight wagon 1. INTRODUCTION The development of rail transport in recent decades goes in direction of increasing the speed and loading performance of the railway vehicles. This directly affects the development of brake technology [11]. The braking system has an essential function of reducing the speed and braking of the vehicle for the minimum possible time. The braking process of rolling stock is of great importance for the safety in the railway traffic. As railway operators focus on the need for greater improvements in efficiency and safety, there is still a significant need to advancements of the railway brake systems [12]. Several types of brake systems are used in the railways. Most commonly are used compressed air brake systems, called pneumatic brake systems [2]. -
Drum Brakes Inspection & Service
Drum Brakes Inspection & Service First you must get the drum off! • Some slide right off, • Some have to be hit with a hammer. • Some have holes to install two bolts (Tighten each bolt equally) Remove A Brake Drum Use penetrant around axle hub May need to hammer floating drum Wet down inside of drum to control dust before hammering Only hammer on the axle flange! (ask to be shown) May need to adjust brake shoes inward Remove A Brake Drum For a fixed brake drum you will need to carefully adjust the wheel bearings when done! There are many tricks to removing stuck brake drums. Before you break something ASK! Understand each piece and avoid mistakes Terminology Anchor Wheel Cylinder Brake Shoes Primary Secondary Return Springs Shoe hold downs Terminology Parking Brake Strut Parking Brake Cable Self Adjusters Backing Plate (often neglected) Backing Plates Backing plates are often overlooked and usually have grooved & worn shoe support pads Be sure to thoroughly clean backing plate and lightly lube the support pads • contact points on backing plate are called a shoe pad. They should be filed flat to prevent shoes from hanging up in deep grooves or better yet just replace the backing plate. Always lube Shoe Support Tabs with a thin layer of Synthetic Disc Brake Lubricant (or suitable lube) Be careful… do not use too much. Grease on brake shoes is BIG TROUBLE! Dual-Servo or Leading-Trailing • Drum brakes on Rear Wheel drive are most often Dual Servo. • They have a Primary and Secondary brake shoe • The Primary shoe friction material is shorter and it faces the front of the vehicle Dual Servo braking action Both brake shoes will pivot Primary shoe will wedge the secondary out into the drum Primary and secondary shoe will fit backwards, but not properly work Which is the primary shoe? Where is the front of this vehicle? Dual-Servo or Leading-Trailing • Drum brakes on Front Wheel drive are most often Leading-Trailing. -
Nat'l Highway Traffic Safety Admin., DOT § 570.56
Nat’l Highway Traffic Safety Admin., DOT § 570.56 § 570.54 Definitions. 50 pounds, the distance that the pedal Unless otherwise indicated, all terms has traveled from its free position shall used in this part that are defined in be not greater than 80 percent of the part 571 of this chapter, Motor Vehicle total distance from its free position to Safety Standards, are used as defined the floorboard or other object that re- in that part. stricts pedal travel. The brake pedal Air-over-hydraulic brake subsystem reserve test is not required for vehicles means a subsystem of the air brake with brake systems designed by the that uses compressed air to transmit a original vehicle, manufacturer to oper- force from the driver control to a hy- ate with greater than 80 percent pedal draulic brake system to actuate the travel. service brakes. (1) Inspection procedure. Measure the Electric brake system means a system distance (i) from the free pedal position that uses electric current to actuate to the floor board or other object that the service brake. restricts brake pedal travel. Depress Vacuum brake system means a system the brake pedal, and with the force ap- that uses a vacuum and atmospheric plied measure the distance (ii) from the pressure for transmitting a force from depressed pedal position to the floor the driver control to the service brake, board or other object that restricts but does not include a system that uses pedal travel. Determine the pedal trav- vacuum only to assist the driver in ap- el percentage as plying muscular force to hydraulic or [(A ¥ B) / A] × 100 mechanical components. -
Low Loader Trailer Manual
Low Loader Trailer Manual If you have any questions please email [email protected] ph (855) 744 3877 futuratrailers.com Futura Trailers Limited Warranty (Overview) Below is a brief overview of your trailers TWO YEAR LIMITED WARRANTY and the process for obtaining warranty service. The full description of the warranty can be found on our website www.futuratrailers.com/warranty. Futura Trailers Inc warrants that its product will be free from defects in materials and workmanship, under normal use and service for a period of two (2) years. The warranty period starts the day of purchase by the original owner. U.S. DEPARTMENT OF TRANSPORT (DOT) REQUIRES FUTURA TRAILERS INC TO HAVE A RECORD OF THE FIRST PURCHASER OF A NEW VEHICLE. PLEASE ASSIST YOUR DEALER BY PROVIDING THE NECESSARY INFORMATION TO REGISTER YOUR TRAILER OR REGISTER ON OUR WEB SITE FUTURATRAILERS.COM/WARRANTY OR E-MAIL [email protected] OR PHONE 855 744 3877 In the event that the trailer is returned to an authorized Futura Trailers dealer or Futura Trailers facility or authorised agent and under their inspection is determined to have been defective in material and/or workmanship, under normal use, the trailer will be repaired without charge to the original purchaser. You must contact Futura Trailers Inc or the dealer from which your trailer was purchased to make a warranty claim. All warranty work performed must be pre-approved by Futura Trailers Inc, or Futura Trailers Inc reserves the right to deny coverage. All repairs must be performed by Futura Trailers Inc, Futura Trailers Inc dealer or a service agent that has been pre-approved by Futura Trailers Inc. -
Full-Scale Dynamometer Test of Composite Railway Brake Shoes – Study on the Effect of the Reinforcing Fibre Type
Piotr Wasilewski DOI 10.2478/ama-2018-0031 Full-Scale Dynamometer Test of Composite Railway Brake Shoes – Study on the Effect of the reinforcing Fibre Type FULL-SCALE DYNAMOMETER TEST OF COMPOSITE RAILWAY BRAKE SHOES – STUDY ON THE EFFECT OF THE REINFORCING FIBRE TYPE Piotr WASILEWSKI* *Faculty of Mechanical Engineering, Department of Mechanics and Applied Computer Science, Bialystok University of Technology, ul. Wiejska 45C, 15-351 Bialystok, Poland; SMiOC Frenoplast Bułhak i Cieślawski S.A., Research and Development Department, Korpele 75 – Strefa, 12-100 Szczytno, Poland [email protected] received 4 June 2018, revised 4 September 2018, accepted 7 September 2018 Abstract: When designing or developing friction materials, it is crucial to predict how the modification of the formulation will affect their properties. Fibres are introduced in the composition of the phenolic-based brake friction materials to improve their mechanical strength. Apart from reinforcing the composite, fibres can also affect its tribological and thermophysical properties. In this study two com- posite friction materials are compared. The difference between the materials was the type of reinforcing fibre used in the formulation – in one case it was glass fibre, in the other steel fibre. Thermal diffusivity of both materials was measured and thermal conductivity was calcu- lated. Frictional characteristics determined by means of full-scale dynamometer tests are analysed and discussed. Substitution of glass fi- bre with steel fibre led to increase in the friction coefficient. Maximum average temperature below wheel surface, observed during the test of the material containing steel fibre, was lower as compared to the test results of the material with glass fibre in its formulation, despite higher heat flux in the course of brake applications. -
Design and Analysis of Modular Caliper Assembly
DESIGN AND ANALYSIS OF MODULAR CALIPER ASSEMBLY A Thesis by Nikhil Pratap Wagh Bachelor of Engineering, Shivaji University, 2000. Submitted to the College of Engineering and the faculty of the Graduate School of Wichita State University in partial fulfillment of the requirements for the degree of Master of Science December 2005 DESIGN AND ANALYSIS OF MODULAR BRAKE CALIPER ASSEMBLY I have examined the final copy of this thesis for form and content and recommend that it to be accepted in partial fulfillment of the requirements for the degree of Master of Science, with a major in Mechanical Engineering. ____________________________________ Dr. George. E. Talia, Committee Chair We have read this thesis and recommend its acceptance: ____________________________________ Dr. Behnam Bahr, Committee Member ____________________________________ Dr. Krishna Krishnan, Committee Member ii DEDICATION This work is dedicated to My Parents For supporting my vision and help me turning it into reality one day iii ACKNOWLEDGMENTS Completing this thesis although was a challenge for me, would not have endeavored without the support, inspiration, encouragements and contribution of many entities. First of all, I would like to take this opportunity to express my profound thanks to my advisor Dr. George E. Talia for his excellent support during my academic tenure at Wichita State University. I would also like to express my gratitude to Dr. Behnam Bahr and Dr. Krishna K. Krishnan for being my thesis committee members. I would like to thank all my friends for their support and wishes. Last but not least I would like to express my gratefulness to my parents who gave me constant encouragement and inspiration throughout my life to achieve my goals. -
Thermal Capacity of Railway Wheels Temperatures, Residual Stresses and Fatigue Damage with Special Focus on Metro Applications
THESIS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN SOLID AND STRUCTURAL MECHANICS Thermal Capacity of Railway Wheels Temperatures, residual stresses and fatigue damage with special focus on metro applications SHAHAB TEIMOURIMANESH Department of Applied Mechanics CHALMERS UNIVERSITY OF TECHNOLOGY Gothenburg, Sweden, 2014 Thermal Capacity of Railway Wheels – Temperatures, residual stresses and fatigue damage with special focus on metro applications SHAHAB TEIMOURIMANESH ISBN 978-91-7385-974-5 © SHAHAB TEIMOURIMANESH, 2014 Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie nr 3655 ISSN 0346-718X Department of Applied Mechanics Chalmers University of Technology SE-412 96 Gothenburg Sweden Telephone +46 (0)31 772 1000 Cover: A metro bogie equipped with a tread brake system (upper), a brake block in contact with a railway wheel (lower right) and view of bogie interior with brake block, wheel and axle (lower left) Photographed by Markus Meinel of Interfleet Technology Chalmers Reproservice Gothenburg, Sweden 2014 Thermal Capacity of Railway Wheels – Temperatures, residual stresses and fatigue damage with special focus on metro applications Thesis for the degree of Doctor of Philosophy in Solid and Structural Mechanics SHAHAB TEIMOURIMANESH Department of Applied Mechanics Chalmers University of Technology ABSTRACT Tread (block) braking is still one of the most common braking systems on railway vehicles. The action is carried out by pressing brake blocks against the tread of a wheel, which is also in rolling contact with the rail. The extensive use of tread brakes in metro and suburban applications has created a need for design guidelines or standards for wheels exposed to repeated stop braking. The thermal capacity of the wheels puts a limit to railway tread braking systems.