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Three kinds of sleeper types commonly used in train accessories
Jan 11, 2018

Wood sleeper a sleeper made from wood.

Also known as pillow wood, anti - corrosion wood pillow, also known as oil pillow.

Wooden pillows are made of tough, resilient wood.

Wooden pillow can be divided into common wooden pillow, fork pillow, bridge pillow.

Ordinary wooden sleeper standard length is 2. 5 m, its profile is divided into two categories, the I, Ⅱ, for different levels of lines.

It is used for the bifurcated pillow on the turnout, and its section is wider than the wooden pillow, with a length ranging from 2600mm to 4800mm, with a total of 12 types, each of which is 20mm in length, and is selected according to the actual width of the turnout.

Used for bridge pillow, its section size varies with the center spacing of main girder (or longitudinal beam).

The wooden pillow has the advantages of good elasticity, easy to process and easy to use.

Since the railway, wooden pillow is the main type of sleeper.

However, due to the reasons of the materials, the elastic, strength and durability of the wooden pillow are not uniform enough, which will increase the dynamic effect of the rail and use a lot of high-quality wood.

The service life of wooden pillow is short, its failure reason is a lot of, mainly is rotten, mechanical wear and crack.

The wooden pillow is embalmed because it is perishable.

A wooden pillow is called a vegetarian pillow.

China's timber resources are scarce and expensive, and have gradually been replaced by concrete pillows on main highways.

2, concrete sleeper, including thread spike structure, reinforcement, fasteners and adjustment of gauge, height adjustment, whose character is: shoulder concrete heightening, gauge apron thickening, rubber plate thickening, in the concrete sleeper by vertical staggered arrangement is decorated with spiral ribbed bars, at the end of block shoulder position configuration shear reinforcement, the damper with concrete sleeper shoulder grooves on both ends anastomosis, gauge apron with baffle block cipher.

3, railway parts of concrete sleeper pillow, pillow, also known as concrete after the second world war, concrete sleeper started using, a lot of concrete sleeper has the advantage of good stability, long service life, maintenance and upkeep provinces;

The concrete pillow has the disadvantages of large weight, elastic and insulating property, and the cushioning insulation cushion should be set in the bottom part of the rail.

5. Connect parts to connect parts to two types. The parts connected to two rail ends are called joint connection parts;

The part that connects the rail and sleeper is called the intermediate connection part, which is the fastener.

The joint connects the parts so that the wheels can roll smoothly through the steel rail joint, and maintain the coordination between the two rails.

The fastener combines the rail and the sleeper into an orbital frame to keep the two rails in the correct position;

The fastener provides enough pressure to prevent the rail from overturning and to prevent the longitudinal movement of the steel rail.

The road bed is usually referred to under the sleeper, and the ballast bed is laid on the roadbed.

The main function is to support the sleeper, and to distribute the huge load from the upper part of the sleeper to the roadbed, which greatly reduces the deformation of the roadbed.

Ballast is 20 ~ 70 mm diameter small block of granite, block and block and the friction between the gap, make orbit has certain elasticity, the elastic can not only absorb shock and vibration of locomotive vehicle, make the train running smoothly, and greatly improve the locomotive vehicles, rail, sleeper components such as working conditions, prolong the service life.

When the elasticity of ballast is lost, the load on the reinforced concrete sleeper is 50~80% higher than the normal state.