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Railway Track Coupler System Type III Fastener Type III Fastener

Railway Track Coupler System Type III Fastener Type III Fastener

The role and importance of bullet points in railway tracks. Railway rail is the part that supports the locomotive and locomotive direction, and the rail is fixed on the sleeper of the ballast by elastic fastener. Elastic fasteners withhold article is mainly to play, it is calculated by the...

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The role and importance of bullet points in railway tracks.

Railway rail is the part that supports the locomotive and locomotive direction, and the rail is fixed on the sleeper of the ballast by elastic fastener.

Elastic fasteners withhold article is mainly to play, it is calculated by the bending and twist deformation, buckle pressure effect on the orbit, effectively guarantee the reliable connection between rail for a long time, as far as possible to keep the integrity of the orbit and stop the rail lateral movement relative to the sleeper, ensure the normal track, to ensure the safety of the rail vehicle.

Also because of the train wheel and rail contact is a rigid contact, thus inevitably produces vibration, and play a special elastic structure makes it also has the absorption of impact energy produced when a vehicle goes by, to achieve the effect of shock absorption.

Play is working under alternating stress repeatedly, it under a variety of action such as bending, torsion and fatigue and corrosion, when vehicles through, even under high transient impact load, so to play a strict performance requirements.

With the increase of rolling stock axle load of railway transportation and the improvement of train speed, and the development of urban rail transit, the subway, playing as a key link in track structure of article also in unceasing development, its importance is becoming more and more concern for all countries.

China is a country with a large scale, and the climate, transportation conditions and regional differences are very large. It requires various kinds of elastic bars of different performance requirements to meet the requirements of different rail types.

If on the conventional line, need to buckle the pressure big, elastic good bullet, meet the need of heavy load, high-speed line;

In seamless line viaduct rail, to reduce rail and bridge interaction, for fastener resistance is small, and maintain enough flexibility, or maintain a low enough stiffness, to ensure the train through the buckle caused by rail pad under compression pressure loss is small, not loose fasteners.

Article is playing is a small works, but it is an important part in orbit, because of its high demand, about 7000 pieces per kilometer, its reliability is directly related to driving safety.

Ii. The types of elastic bars used by countries around the world.

Depending on the national conditions and usage habits, different countries have developed various bullet bars to accommodate the development of railway transportation.

The most typical among them has: the British have to roll pan (PANDROL) article series elastic fasteners, is one of the most famous in the world, have the largest influence fasteners, its withhold with PR series play, E series play, the scope of its use in the United States, Canada, India, etc. More than seventy countries and regions.

The German railway USES the famous HM type fasteners, which is used in SKL series, and also has good effect on the online road. It is also widely used in other countries and regions.

The Dutch D.E type fastener and the Swiss FIST fastener are used as the buckle and the usage is good.

Japan and France are countries that use shraps as couplers. Among them are the famous naboo fasteners in France, and the famous type 102 fasteners in the new dry passage of Japan's donghai road.

3. The shrapnel and elastic bar fastener used in China.

Shrapnel when withhold job mainly USES the bending deformation of material performance, processing is relatively simple, the cost also tend to be low, but due to the hole for the bolt fastening, prone to stress concentration at the surface bending moment maximize exactly is maximize extinction.

The arched shrapnel fastener, which was developed in the early stage of our country, is found to be easily broken in the use of bolts. The vibration produced during the passage of the train makes the shrapnel loose, and even some nuts are pulled out of the bolt.

Another gauge baffle under vibration is easy to climb to the top of the bottom of the rail, contribute to a widening gauge, because this kind of situation, the current in line Ⅰ DT, DT Ⅱ fasteners with shrapnel as withhold, other is no longer with shrapnel type fasteners on the track.

Play withhold job in article USES the bending deformation of material properties, and USES the torsional deformation of material properties (especially the circular cross section), and generally good elasticity and basically no section weakened at the same time, so the material utilization rate is higher, on the routine, generally want to withhold pressure big, good elasticity, this article elastic fasteners has obvious superiority.

At present our country on the rail and other rail transit withhold a article mostly use spring type, the form of our country play a withhold a basically has: a bolt installation omega article structure in the form of a play, such as the proper use of Ⅰ, Ⅱ play, shilong little resistance to play bridge, WJ - type 2 play, etc.;

No bolt installation pande roll type, such as play, DT Ⅵ Ⅲ fasteners with play, guangzhou metro with PR type, etc.;

There are other structural forms of bullet bars, double toe sticks, intermediate bullet bars.


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