air brake and train handling manual
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air brake and train handling manualPlease try again.Please try again.Please try again. The proponent of this publication is Headquarters (HQ), United States Army Training and Doctrine Command (TRADOC). CHAPTER 1 RULES FOR INSPECTION, TESTING, AND MOVEMENT OF LOCOMOTIVES Rule 1-1. TAKING CHARGE OF LOCOMOTIVE. Inspectors are jointly responsible with engineers for the condition of air brake equipment on the locomotive to the extent that it is possible to detect defective equipment by required inspections and tests. Dynamic brake cutout switches must be properly tagged. Locomotive units which are required to be shut down at outside locations where there are no mechanical employees available will be started by the engineer. An engine that has been shut down for more than eight hours must be pre-lubed before turnover. If the engine is equipped with flash cock “T” handles, the flash cocks must be opened. The engine must also be turned over at least one revolution and the flash cock closed prior to starting. In cases of rain, severe snow conditions, or when ambient temperature is below 32 degrees Fahrenheit and the engine has been shut down for at least 4 hours, the engineer will conduct the same operation as described above. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Register a free business account To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness. It looks like your browser needs updating. For the best experience on Quizlet, please update your browser. Learn More. Air Compressor A device for compressing air, which is used for operation of air brakes and air-operated equipment on locomotives and cars.http://psiholab.com/royal/userfiles/bosch-home-alarm-manual.xml
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Alerter A device, which detects movement of the engineer and initiates a penalty brake application when the required frequency of such movement is not maintained. Angle Cock A valve located at each end of engines and cars used to open or close the brake pipe. The handle is hinged so as to lock in the open or closed position. When handle is parallel to the pipe, the cock is open. Automatic Brake Valve (AB) A manually operated device positioned by the engineer. Its purpose is to: 1) control the flow of air into the equalizing reservoir and brake pipe for charging and releasing a brake application, and 2) provide a reduction of equalizing reservoir and brake pipe pressure at a service or emergency rate to initiate a brake application. An automatic rake valve may be either self-lapping or non self-lapping. Automatic Brake Valve (Self-Lapping) An AB valve having a SERVICE ZONE in which the AB valve handle is moved to initiate, increase or release an AB application (Type 26-C; 26B-1) Automatic Brake Valve (Non Self-Lapping) An AB valve having separate LAP and SERVICE positions (26E-1 and EPIC Cab Control Portion). Automatic Drain Valve A device, which automatically drains condensate from the compressed air system. Auxiliary Reservoir A compressed air storage volume usually charged from the brake pipe, which provides air pressure for use in service and emergency brake applications. Brake Application (Automatic) A manual reduction of brake pipe pressure of sufficient amount to cause control valves to move to service or emergency position, causing the brakes to apply. If made in the SERVICE position or zone of the automatic brake valve, the brake application may consist of one or more reductions.Brake Cylinder A device in which compressed air acts on a piston to transmit the force of the compressed air to the associated brake rigging. Brake, Inoperative A primary brake that, for any reason, no longer applies or releases as intended or is otherwise ineffective.http://lacasedescaraibes.fr/bosch-home-appliance-manuals.xml Brake, Parking or Hand Brake A brake that can be applied and released by hand, or by other means, to prevent movement of a stationary rail car or locomotive. Brake Pipe A system of piping including branch pipes, angle cocks, cutout cocks, dirt collectors, hoses and hose couplings, used to transmit increases and reductions in brake pipe pressure to control locomotive and car air brakes. Brake Pipe Gradient The difference in brake pipe pressure between the front and rear of the train. Braking System All apparatus such as air brake, electro-pneumatic brake, related piping, hand brakes, foundation brake rigging and dynamic brake, which act to retard, stop, or prevent the movement of a train, locomotive or car. Branch Pipe Cutout Cock A device used on locomotives and cars to isolate the control valve from the brake pipe. When cut in, the handle is in the vertical position. Buff A term referring to compressive forces exerted on couplers, draft gear, and frames of locomotives and cars. Calendar Day A time period running from one midnight to the next midnight on a given date. Check Valve A device so designed that it permits air to flow in one direction while preventing air from flowing in the opposite direction. Control Valve A device on locomotives and cars, which charges the reservoirs and applies or releases the brake cylinder pressure in response to reduction or increase of brake pipe pressure. Cutout Cock A manually operated device in a pipe for allowing or preventing the flow of air. Dummy Coupling Hangers or supports for air hoses on the ends of locomotives, cab cars, or passenger equipment to protect the hoses when not in use. Dummy couplings must be used except where pockets are provided to hold the hoses. Effective Brake A brake that is capable of producing its required designed retarding force on the train. Emergency Reservoir A storage volume for compressed air, usually charged from the brake pipe, which provides air for use in emergency brake applications.http://www.drupalitalia.org/node/67737 Engineer When used in this publication, the term Engineer pertains equally to Train Service, Locomotive Servicing and Student Engineers. Foundation Brake Rigging The levers, rods, brake beams and hangers by which brake cylinder force is transmitted to brake shoes. Freight Car A vehicle designed to carry freight, or railroad personnel by rail, or a vehicle designed for use in a work or wreck train. Grade (Of Track) Grade is expressed as a percentage, which is the number of feet the track rises or falls in a longitudinal distance of 100 feet. For example, a 1 ascending grade means that the track rises 1 foot in elevation for every 100 feet of distance traversed along the track. Independent Brake Valve (IBV) A manually operated device, positioned by the Engineer to apply or release the locomotive brakes on locomotives so equipped. The IBV operates independently of the train brakes. Intercooler A device or piping arrangement, which cools the compressed air between stages of compression. Lite Engine One or more locomotives coupled and operated from a single control station, without car(s). Locomotive (Or Engine) A unite propelled by any form of energy, or a combination of such units, operated from a single control station, used in train or yard service. This includes cab cars and Arrow MU equipment. Locomotive, Control Car A unit of rolling equipment intended to provide transportation for members of the general public that is without propelling motors, but with one or more control stands. Locomotive, MU A unit of rolling equipment, propelled by any power source other than steam, intended to provide transportation for members of the general public. Main Reservoir One or more reservoirs on a locomotive for storing the main supply of compressed air. Originating Terminal Originating terminal for a train to be used in passenger service after it is initially made up.http://artisanatlucratif.com/images/3vz-fe-service-manual.pdf Piston Travel The amount of linear movement of the air brake hollow rod (or equivalent), or piston rod, when forced outward by the movement of the piston in the brake cylinder or actuator, and limited by the brake shoes being forced against the wheel or disc. PSI (Pounds Per Square Inch) A unit of measurement of air pressure. This person shall also possess a current understanding of what is required to properly repair and maintain the safety-critical brake or mechanical components for which the person is assigned responsibility. Qualified Person (QP) A person who has received the instruction and training necessary to perform one or more functions required by the FRA. Te railroad is responsible for determining that the person has the knowledge and skills necessary to perform the required function for which the person is assigned responsibility. The railroad determines the qualifications and competencies for employees designated to perform various functions. Reduction, Brake Pipe A decrease in brake pipe pressure of a sufficient amount to cause the initiation or increase of a train brake application. Retaining Valve A manually positioned device found on a freight car that controls the release of brake cylinder pressure. Safety Valve A device designed to open and close at predetermined pressures, used to limit the maximum pressure in air systems. Service Application A brake application accomplished by making one or more brake pipe reductions at a service rate. Service Rate of Reduction A reduction of brake pipe pressure at a rate fast enough to cause a service brake application, but at a rate slow enough to prevent an emergency application. Slack The accumulation of clearances, wear, and normal travel of coupler and draft gear components, which cause motion within a train. If slack is not carefully controlled, severe damaging forces will develop.https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1626c4b0961d2a---canon-ip5200r-service-manual.pdf Stringlining The undesirable tendency for the cars of a train to follow a straight path across a curved section of track, rather than around that section. Excessive draft forces being generated in the train usually cause this. Tractive Effort The power developed by a locomotive to move trains. Unauthorized access, use, distribution, or modification of Union Pacific computer systems or theircontent is prohibited by Pacific RulesAir Brake and Train Handling RulesEffective January 20, 2012 Includes Updates as of July 2, 2013PB-20329 Union Pacific Railroad. All Rights Rules become effective at 0001, Friday, January 20, 2012.Unauthorized access, use, distribution, or modification of Union Pacific computer systems or theircontent is prohibited by Pacific RulesAir Brake and Train Handling RulesEffective January 20, 2012 Includes Updates as of July 2, 2013PB-20329 Union Pacific Railroad. All Rights Rules become effective at 0001, Friday, January 20, 2012. Leave information for the relieving crew, and notify the dispatcher orMechanical Help Desk. Report this Document Save Save ABTH Manual Railtown.pdf For Later 0 ratings 0 found this document useful (0 votes) 86 views 44 pages ABTH Manual Railtown.pdf Uploaded by Anshul Gupta Description: RAILWAYS Full description 0 0 found this document useful, Mark this document as useful 0 0 found this document not useful, Mark this document as not useful Embed Share Print Download now Jump to Page You are on page 1 of 44 Search inside document Cancel anytime. 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( July 2013 ) ( Learn how and when to remove this template message ) In various forms, it has been nearly universally adopted.Full air pressure signals each car to release the brakes.http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1626c4b12545f0---canon-ip5200r-user-manual.pdfThe piston is connected through mechanical linkage to brake shoes that can rub on the train wheels, using the resulting friction to slow the train. The mechanical linkage can become quite elaborate, as it evenly distributes force from one pressurized air cylinder to 8 or 12 wheels.The principal problem with the straight air braking system is that any separation between hoses and pipes causes loss of air pressure and hence the loss of the force applying the brakes. This could easily cause a runaway train. Straight air brakes are still used on locomotives, although as a dual circuit system, usually with each bogie (truck) having its own circuit.In so doing, it supports certain other actions (i.e. it 'holds' or maintains the application and it permits the exhaust of brake cylinder pressure and the recharging of the reservoir during the release). In his patent application, Westinghouse refers to his 'triple-valve device' because of the three component valvular parts comprising it: the diaphragm-operated poppet valve feeding reservoir air to the brake cylinder, the reservoir charging valve, and the brake cylinder release valve. Westinghouse soon improved the device by removing the poppet valve action, these three components became the piston valve, the slide valve, and the graduating valve.Pressure increases in the cylinder, applying the brakes, while decreasing in the reservoir. This action continues until equilibrium between the brake pipe pressure and reservoir pressure is achieved. At that point, the airflow from the reservoir to the brake cylinder is lapped off and the cylinder is maintained at a constant pressure. The triple valve also causes the brake cylinder to be exhausted to the atmosphere, releasing the brakes. When the engine operator releases the brake, the locomotive brake valve portal to atmosphere is closed, allowing the train line to be recharged by the compressor of the locomotive.http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1626c4b18c1fce---canon-ip5300-manual.pdf The subsequent increase of train line pressure causes the triple valves on each car to discharge the contents of the brake cylinder to the atmosphere, releasing the brakes and recharging the reservoirs.It takes several seconds for the train line pressure to reduce and consequently takes several seconds for the brakes to apply throughout the train.This system provides service and emergency braking control for the entire length of the train. The independent brake makes brake applications on the head-of-train locomotive consist independently of the automatic brake and provide for more nuanced train control. The two braking systems may interact differently, as a matter of preference by the locomotive builder or the railroad. In some systems, the automatic and independent applications will be additive; in some systems the greater of the two will apply to the locomotive consist. The independent system also provides a bail off mechanism, which releases the automatic brakes on the lead locomotive consist without affecting the brake application on the rest of the train. An emergency application also results when the train line comes apart or otherwise fails, as all air will also be immediately vented to atmosphere.The triple valve is divided into two portions: the service portion, which contains the mechanism used during brake applications made during service reductions, and the emergency portion, which senses the faster emergency reduction of train line pressure. Farther away from the source of the emergency application, the rate of reduction can be reduced to the point where triple valves will not detect the application as an emergency reduction. To prevent this, each triple valve's emergency portion contains an auxiliary vent port, which, when activated by an emergency application, also locally vents the train line's pressure directly to atmosphere. This serves to propagate the emergency reduction rate along the entire length of the train.avtomix.com/upload/files/connecticut-dmv-manual-permit.pdfEP brakes have been in British practice since 1949 and also used in German high-speed trains (most notably the ICE ) since the late 1980s; they are fully described in Electro-pneumatic brake system on British railway trains. Electro-pneumatic brakes are currently in testing in North America and South Africa on captive service ore and coal trains.This was an electrically controlled overlay on conventional D-22 passenger and 24-RL locomotive brake equipment. On the conventional side, the control valve set a reference pressure in a volume, which set brake cylinder pressure via a relay valve. On the electric side, pressure from a second straight-air trainline controlled the relay valve via a two-way check valve. Each axle was also equipped with anti-lock brake equipment. The combination minimized braking distances, allowing more full-speed running between stops.Also if the train divides the wire will be broken, ensuring that all motors are switched off and both portions of the train have an immediate emergency brake application.The car reservoirs recharge only when the brake pipe pressure is higher than the reservoir pressure, and that the car reservoir pressure will rise only to the point of thermodynamic equilibrium.On a descending grade, the result will be a runaway.The triple valves detect an emergency reduction based on the rate of brake pipe pressure reduction. Therefore, as long as a sufficient volume of air can be rapidly vented from the brake pipe, each car's triple valve will cause an emergency brake application. However, if the brake pipe pressure is too low due to an excessive number of brake applications, an emergency application will not produce a large enough volume of air flow to trip the triple valves, leaving the engine driver with no means to stop the train.Often, blended braking, the simultaneous application of dynamic and train brakes, will be used to maintain a safe speed and keep the slack bunched on descending grades. Care would then be given when releasing the service and dynamic brakes to prevent draw-gear damage caused by a sudden run out of the train's slack.Left needle shows air supplied by the main reservoir pipe, right needle shows brake cylinder pressure In addition to the traditional brake pipe, this enhancement adds the main reservoir pipe, which is continuously charged with air directly from the locomotive's main reservoir. The main reservoir is where the locomotive's air compressor output is stored, and is ultimately the source of compressed air for all systems that use it.This arrangement helps to reduce the above described pressure loss problems, and also reduces the time required for the brakes to release, since the brake pipe only has to recharge itself.Nearly all passenger trains (all in the UK and USA), and many freights, now have the two-pipe system.In this case, the brakes on the wagons behind the closed cock will fail to respond to the driver's command. This happened in the 1953 Pennsylvania Railroad train wreck involving the Federal Express, a Pennsylvania Railroad train which became runaway while heading into Washington DC's Union Station, causing the train to crash into the passenger concourse and fall through the floor. Similarly, in the Gare de Lyon rail accident, a valve was accidentally closed by the crew, reducing braking power.Railroads have strict government-approved procedures for testing the air brake systems when making up trains in a yard or picking up cars en route. These generally involve connecting the air brake hoses, charging up the brake system, setting the brakes and manually inspecting the cars to ensure the brakes are applied, and then releasing the brakes and manually inspecting the cars to ensure the brakes are released. Particular attention is usually paid to the rearmost car of the train, either by manual inspection or via an automated end-of-train device, to ensure that brake pipe continuity exists throughout the entire train. When brake pipe continuity exists throughout the train, failure of the brakes to apply or release on one or more cars is an indication that the cars' triple valves are malfunctioning. Depending on the location of the air test, the repair facilities available, and regulations governing the number of inoperative brakes permitted in a train, the car may be set out for repair or taken to the next terminal where it can be repaired.However, the basic air brakes used on railways worldwide are remarkably compatible.Some locomotives, e.g. on the London, Brighton and South Coast Railway, were dual-fitted so that they could work with either vacuum- or air-braked trains.Note the three pipes, one for vacuum brake, one for air brake and one for steam heatDisconnection taps at the ends of cars are not required as the loose hoses are sucked onto a mounting block.This disadvantage is made worse at high altitude. The vacuum brake is also considerably slower acting in both applying and releasing the brake; this requires a greater level of skill and anticipation from the driver. Conversely, the vacuum brake had the advantage of gradual release long before the Westinghouse automatic air brake, which was originally only available in the direct-release form still common in freight service. A primary fault of vacuum brakes is the inability to easily find leaks. In a positive air system, a leak is quickly found due to the escaping pressurized air; discovering a vacuum leak is more difficult, although it is easier to repair when found because a piece of rubber (for example) can just be tied around the leak and will be firmly held there by the vacuum.Despite requiring larger and heavier equipment as stated above, the performance of the electro-vacuum brake approached that of contemporary electro-pneumatic brakes. However, their use has not been repeated.Copyright 2006 Alaska Railroad Corporation Copyright 2003 BNSF Railway Company By using this site, you agree to the Terms of Use and Privacy Policy. EC-99 pages in original plastic, never opened. This was to be put in a ring binder. Great for RR enthusiastist. Verisign. By continuing to browseFind out about Lean Library here Find out about Lean Library here This product could help you Lean Library can solve it Content ListSimply select your manager software from the list below and click on download.Simply select your manager software from the list below and click on download.For more information view the SAGE Journals Sharing page. Search Google ScholarSearch Google ScholarSearch Google Scholar. See all articles by this author. Search Google ScholarSearch Google ScholarSearch Google ScholarSearch Google Scholar. Search Google ScholarThe forces developed by the air brake depend on various system components, including the automatic brake valve, the brake pipe and the car control unit (CCU). The developed braking forces, which depend on the position of handle of the automatic brake valve, are applied to the wheels using the CCU located along the brake pipe and enter into the formulation of the non-linear dynamic equations for the train in addition to other external forces. In order to develop an efficient computational procedure, simplified valve models, with more straightforward operation modes, are considered in order to reduce the computational overhead. The CCU used in this research has a control valve connected to three main pneumatic components: the auxiliary reservoir, the emergency reservoir and the brake cylinder. The reservoirs are the main storage area of the pressurized air, while the brake cylinder transmits the brake force to the wheels using the mechanical components of the CCU, including the brake rigging and the brake shoes. The communications between different parts connected to the control valve are controlled by its slide valve that can be positioned in the brake application, brake release and lap positions. It is also assumed that the CCU modeled in this study has the emergency portion that enables it to apply emergency braking, including the effect of the CCU’s emergency vent valve. In this paper, a mathematical model for the CCU is developed, while the locomotive automatic brake valve and brake pipe models are developed in a companion paper. The relationship between the main components of the air brake system and the train dynamics is discussed, and the final set of differential equations that includes the two models is presented. Furthermore, different computer simulation scenarios are considered in this paper in order to investigate the effect of the air brake forces on the train’s longitudinal dynamics for cases of different braking modes. The numerical results, obtained in this study, are compared with experimental results published in the literature. Keywords Air brake, locomotive valve, longitudinal train dynamics, railroad vehicles, finite element References 1. Specchia, S, Afshari, A, Shabana, AA. A train air brake force model: locomotive automatic brake valve and brake pipe flow formulations. Proc IMechE, Part F: J Rail Rapid Transit 2012. Google Scholar 3. John JE and Keith TG. Gas dynamics. third edn. New Jersey: Pearson, 2006. Google Scholar 4. White FM. Fluid mechanics. sixth edn. New York: McGraw Hill, 2008. Google Scholar 5. Railway Technical Web Pages. Air brakes. (site last updated on 16 July 2010, accessed 18 August 2010). Google Scholar 6. Bansiter WN. A dynamic model of pneumatic control valve system. Master’s Thesis, University of New Hampshire, Durham, NH, USA 1979. Google Scholar 7. Limbert, D. Undesired emergency brake study complete. Railway Age 1990. Google Scholar 8. Gauthier RG. An analysis and simulation of a pneumatic control valve system. Master’s Thesis, University of New Hampshire, Durham, NH, 1977. Google Scholar 9. Kreel JW. A dynamic model and computer simulation of a pneumatic control valve system. Master’s Thesis, University of New Hampshire, Durham., NH, 1979. Google Scholar 10. Wetenkamp, HR. Management of train operation and train handling. Air Brake Association 1974. Google Scholar 11. Wright BW. A dynamic analysis of distributed pneumatic control system. Master Thesis, University of New Hampshire, Durham, NH, 1978. Google Scholar 12. WW, Kratville. The car and locomotive cyclopedia. Simmons-Boardman, 1997. Google Scholar 13. Sanborn, G, Heineman, J, Shabana, AA. A low computational cost nonlinear formulation for multibody railroad vehicle systems. Las Vegas, NV., paper no. DETC2007-34522. Google Scholar 14. Sanborn, G, Heineman, J, Shabana, AA. Implementation of low computational cost nonlinear formulation for multibody railroad vehicle systems. Las Vegas, NV., paper no. DETC2007-34525. Google Scholar 15. Abdol-Hamid KS. Analysis and simulation of the pneumatic braking system of freight trains. PhD Thesis, Department of Mechanical Engineering, University of New Hampshire, Durham, NH, 1986. Google Scholar Find out about Lean Library here Search Google ScholarSearch Google ScholarSearch Google Scholar. Search Google ScholarTransportation Safety and Environment Oct 2020 Show details Hide details Modelling and parameter identification of friction coefficient for bra. Crossref Zewang Yuan and more. International Journal of Rail Transportation Sep 2020 Show details Hide details Train braking simulation with wheel-rail adhesion model Crossref Qing Wu and more. Vehicle System Dynamics Aug 2020 Show details Hide details By continuing to browse. 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