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Hot Box
A hot box is the term used when an axle bearing overheats on a piece of railway rolling stock. The term is derived from the journal-bearing trucks used before the mid-20th century. The axle bearings were housed in a box that used oil-soaked rags or cotton (collectively called "packing") to reduce the friction of the axle against the truck frame. When the oil leaked or dried out, the bearings overheated, often starting a fire that could destroy the entire railroad car (and cars coupled to it) if not detected early enough. The packing and bearing had to be regularly inspected by yard crews, and packing was often added at major stops. The journal bearing was replaceable, but if neglected, it would heat to a temperature where the babbitt bearing alloy would melt away, leaving the brass carrier riding on the steel axle, and result in a "taper journal". This would eventually lead to the axle fracturing and the car above falling onto the wheel, or failure of the taper journal, ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad Truck, FM55-20
Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on sleepers (ties) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves. Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system generally encounters lower frictional resistance than rubber-tyred road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The operation is carried out by a railway company, providing transport between train stations or freight customer facilit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tapered Roller Bearing
Tapered roller bearings are rolling element bearings that can support axial forces (i.e., they are good thrust bearings) as well as radial forces. Description The inner and outer ring raceways are segments of cones and the rollers are tapered so that the conical surfaces of the raceways, and the roller axes, if projected, would all meet at a common point on the main axis of the bearing. This geometry makes the motion of the cones remain coaxial, with no sliding motion between the raceways and the outside diameter of the rollers. This conical geometry creates a linear contact patch which permits greater loads to be carried than with spherical (ball) bearings, which have point contact. The geometry means that the tangential speeds of the surfaces of each of the rollers are the same as their raceways along the whole length of the contact patch and no differential scrubbing occurs. The rollers are stabilized and restrained by a flange on the inner ring, against which their la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1979 Mississauga Train Derailment
The Mississauga train derailment occurred on November 10, 1979, in Mississauga, Ontario, Canada, when a CP Rail freight train carrying hazardous chemicals derailed and caught fire. More than 200,000 people were evacuated in the largest peacetime evacuation in North America until Hurricane Katrina. The fire was caused by a failure of the lubricating system. No deaths resulted from the incident. Causes A CP Rail freight train, led by three EMD F40PH diesel locomotives loaned from GO Transit, was eastbound from Windsor, Ontario. The train consisted of 106 cars that carried multiple chemicals and explosives, including styrene, toluene, propane, caustic soda, and chlorine. On the 33rd car, heat began to build up in an improperly-lubricated journal bearing on one of the wheels, one of the few still in use at that time as most had long since been replaced with roller bearings, resulting in the condition known among train workers as a "hot box". Residents living beside the tracks repo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frankford Junction Train Wreck
The Frankford Junction train wreck occurred on September 6, 1943, when Pennsylvania Railroad's premier train, the ''Congressional Limited'', crashed at Frankford Junction in the Kensington neighborhood of Philadelphia, Pennsylvania in the United States, killing 79 people and injuring 117 others. Train The ''Congressional Limited'' traveled between Washington D.C. and New York City, normally making one stop in Newark, New Jersey, covering the in 3½ hours at speeds up to , remarkable at the time. As it was the Labor Day Weekend in 1943, the company laid on 16-car trains to accommodate the expected high demand. At Washington's Union Station on Monday, September 6, 541 passengers boarded the 4 p.m. train, its 16 cars hauled by PRR GG1 electric locomotive number 4930,ICC Investigation No.2726 scheduled to travel nonstop to Pennsylvania Station, New York. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hightstown Rail Accident
The "Hightstown" rail accident occurred on the Camden and Amboy Railroad between Hightstown, New Jersey and Spotswood on 8 November 1833, just two months after horses were replaced by steam locomotives on the line. It is the earliest recorded train accident involving the death of passengers. The train had been travelling from South Amboy to Bordentown at a speed of , when despite having stopped "to oil the wheels" and slowing to , a journal box overheated (a condition known as hot box) and caught fire, causing an axle to break on one of the carriages, derailing and overturning it. All but one of the 24 passengers it carried were injured; one was killed outright and another died later from his injuries. Among the injured was Cornelius Vanderbilt, who broke a leg and vowed never to travel by train again, although he later broke his vow and eventually became a railway magnate, owning the New York Central Railroad, among others. Another passenger was Congressman and former US Preside ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swiss Northern Railway
The Swiss Northern Railway (German: ''Schweizerische Nordbahn'', SNB), informally known as the ''Spanisch-Brötli-Bahn'', opened the first railway line within Switzerland in 1847, the Zürich–Baden line. This followed the extension of a French railway to Basel in 1844. The original line generally followed the south bank of the Limmat from Zürich to near its confluence with the Aar near Brugg and then it generally followed the south bank of the Aar to Olten. It was absorbed into the Swiss Northeastern Railway (German: ''Schweizerische Nordostbahn'', NOB) in 1853 and extended from Baden to Brugg in 1858. The line was absorbed into the Swiss Federal Railways on its establishment in 1902. It is electrified at 15 kV 16.7 Hz and its eastern 16 km section from Zürich to Killwangen-Spreitenbach is now part of the Zürich–Olten trunkline and has four tracks. History The section between Zürich and Baden was opened on 7 August 1847 by the Swiss Northeastern Railway. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Western Railway
The Great Western Railway (GWR) was a British railway company that linked London with the southwest, west and West Midlands of England and most of Wales. It was founded in 1833, received its enabling Act of Parliament on 31 August 1835 and ran its first trains in 1838 with the initial route completed between London and Bristol in 1841. It was engineered by Isambard Kingdom Brunel, who chose a broad gauge of —later slightly widened to —but, from 1854, a series of amalgamations saw it also operate standard-gauge trains; the last broad-gauge services were operated in 1892. The GWR was the only company to keep its identity through the Railways Act 1921, which amalgamated it with the remaining independent railways within its territory, and it was finally merged at the end of 1947 when it was nationalised and became the Western Region of British Railways. The GWR was called by some "God's Wonderful Railway" and by others the "Great Way Round" but it was famed as the "Holi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheelset (rail Transport)
A wheelset is a pair of railroad vehicle wheels mounted rigidly on an axle such that both wheels rotate in unison. Wheelsets are often mounted in a bogie ("truck" in North America) – a pivoted frame assembly holding at least two wheelsets – at each end of the vehicle. Most modern freight cars and passenger cars have bogies each with two wheelsets, but three wheelsets (or more) are used in bogies of freight cars that carry heavy loads, and three-wheelset bogies are under some passenger cars. Four-wheeled goods wagons that were once near-universal in Europe and Great Britain and their colonies have only two wheelsets; in recent decades such vehicles have become less common as trainloads have become heavier. Conical wheel-tread Most train wheels have a conical taper of about 1 in 20 to enable the wheelset to follow curves with less chance of the wheel flanges coming in contact with the rail sides, and to reduce curve resistance. The rails gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cogload Junction
Cogload Junction is a railway junction in Durston, Somerset, England. It is where the 1906-opened London to Penzance Line via Castle Cary joins the original line that runs via Bristol Temple Meads. A flyover was constructed in 1931 converting it into a flying junction. Location The junction is situated in the parish of Durston, east of Taunton railway station, but is named after Cogload Farm which is south of the Castle Cary Line near the junction. It lies alongside the Bridgwater and Taunton Canal. History The Bristol and Exeter Railway was opened through on 1 July 1842. By 1867 it was carrying through trains from London Paddington to , and in 1876 the line became part of the Great Western Railway. On 11 June 1906 goods trains started to run over the new Langport and Castle Cary Railway line between Cogload and , and passenger trains joined them on 2 July that year. This shortened the journey from London to Taunton (and Penzance) by . At this time an ordinary dou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dust Explosion
A dust explosion is the rapid combustion of fine particles suspended in the air within an enclosed location. Dust explosions can occur where any dispersed powdered combustible material is present in high-enough concentrations in the atmosphere or other oxidizing gaseous medium, such as pure oxygen. In cases when fuel plays the role of a combustible material, the explosion is known as a fuel-air explosion. Dust explosions are a frequent hazard in coal mines, grain elevators, and other industrial environments. They are also commonly used by special effects artists, filmmakers, and pyrotechnicians, given their spectacular appearance and ability to be safely contained under certain carefully controlled conditions. Thermobaric weapons exploit this principle by rapidly saturating an area with an easily combustible material and then igniting it to produce explosive force. These weapons are the most powerful non-nuclear weapons in existence. Terminology If rapid combustion occurs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Race (bearing)
The rolling-elements of a rolling-element bearing ride on races. The large race that goes into a bore is called the ''outer race'', and the small race that the shaft rides in is called the ''inner race''. Design In the case of ball bearings, the bearing has inner and outer ''races'' and a set of balls. Each race is a ring with a groove where the balls rest. The groove is usually shaped so the ball is a slightly loose fit in the groove. Thus, in principle, the ball contacts each race at a single point. However, a load on an infinitely small point would cause infinitely high contact pressure. In practice, the ball deforms (flattens) slightly where it contacts each race, much as a tire flattens where it touches the road. The race also dents slightly where each ball presses on it. Thus, the contact between ball and race is of finite size and has finite pressure. The deformed ball and race do not roll entirely smoothly because different parts of the ball are moving at different spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolling-element Bearing
In mechanical engineering, a rolling-element bearing, also known as a rolling bearing, is a bearing which carries a load by placing rolling elements (such as balls or rollers) between two concentric, grooved rings called races. The relative motion of the races causes the rolling elements to roll with very little rolling resistance and with little sliding. One of the earliest and best-known rolling-element bearings are sets of logs laid on the ground with a large stone block on top. As the stone is pulled, the logs roll along the ground with little sliding friction. As each log comes out the back, it is moved to the front where the block then rolls on to it. It is possible to imitate such a bearing by placing several pens or pencils on a table and placing an item on top of them. See " bearings" for more on the historical development of bearings. A rolling element rotary bearing uses a shaft in a much larger hole, and cylinders called "rollers" tightly fill the space between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
