Pourquoi les locomotives modernes utilisent un châssis de bogie fabriqué de bonne qualité

Les locomotives modernes deviennent plus lourdes et plus puissantes. Donc, ils doivent opérer dans des conditions plus difficiles. Pour répondre à la demande d’une traction plus élevée et d’une meilleure efficacité, the bogies under the locomotives had to be improved. Dans le passé, railway vehicles mostly used bolster-type bogies. Cependant, almost all modern locomotives now use châssis de bogie fabriqué.

Donc, why did the industry make this change? D'abord, lechâssis de bogie fabriqué better meets the needs of modern locomotives. Suivant, we will explain the reasons in detail.

1.What is a Bolster-Type Bogie?

The bolster-type bogie is an older design. It mainly consists of three large cast steel components: two side frames and a central bolster.

This design is very robust and was cheap to manufacture. Donc, it was widely used in freight trains and some older passenger coaches. Cependant, it also has some clear disadvantages. Par exemple, the central bolster takes up a lot of space, making it impossible to install the large traction motors required by modern locomotives.

2. What is a Fabricated Bogie Frame?

Le châssis de bogie fabriqué is a completely new design. It is a single, one-piece structure welded from steel plates.

Pendant la fabrication, workers first cut the steel plates, then bend them into shape, and finally weld them together precisely using fixtures. Donc, the final product is a strong and dimensionally precise single frame. Aujourd'hui, you can find this châssis de bogie fabriqué on almost all high-power locomotives and high-speed trains.

3. Why the Fabricated Bogie Frame is Better

There are many important reasons why modern locomotives choose thechâssis de bogie fabriqué. Let’s look at them one by one.

First and most importantly, it provides space for the traction motor. Lechâssis de bogie fabriqué is designed from the start with the motor’s location in mind. En revanche, the old bolster-type design simply cannot do this.

En outre, lechâssis de bogie fabriqué has higher strength. Locomotives endure tremendous forces and impacts during operation. Heureusement, the welded structure allows for adding material to reinforce areas where it’s most needed, making it stronger and more durable than cast parts.

En même temps, it offers more stable operation. Modern locomotives run at higher speeds, so they need various shock absorbers. Le châssis de bogie fabriqué can provide precise mounting points for these devices, greatly improving ride stability.

Another advantage is its higher manufacturing precision. Large castings are prone to deformation, mais lechâssis de bogie fabriqué can be precision-machined after welding. Donc, its dimensions are very accurate, which helps reduce wheel and rail wear.

De plus, it is lighter. Designers can use thinner plates in areas with lower stress. Donc, lechâssis de bogie fabriqué achieves weight optimization while ensuring strength, which helps save energy.

Enfin, in the long run, its total cost is lower. Although the initial manufacturing cost of achâssis de bogie fabriqué might be higher, it is more durable, has fewer failures, and is easier to maintain. Par conséquent, over the locomotive’s entire service life, it actually saves money.

4. How a Fabricated Bogie Frame is Made

The manufacturing process for achâssis de bogie fabriqué is very precise and involves the following main steps:

D'abord, workers cut steel plates into the required shapes using lasers or plasma cutters.
Suivant, they bend these plates into the designed shapes.
Alors, all parts are placed into large fixtures and welded together.
Après soudage, the entire frame undergoes heat treatment to relieve internal stresses.
Following that, CNC machines are used for finishing key surfaces.
Enfin, various inspection methods like ultrasound are used to ensure the product is free of defects.

5. Fournisseur

En résumé, modern locomotives need to meet many strict requirements for traction, stabilité, and longevity. While the traditional bolster-type bogie cannot fully meet these modern demands, it remains a cost-effective solution for many regional and freight applications.

This is why the global industry has largely shifted to the châssis de bogie fabriqué for high-performance locomotives. À Luoyang Fonyo Heavy Industries Co., Ltd., we understand that different rolling stock have different needs. Donc, we offer a complete range of bogie solutions—from reliable bolster-type bogies to advanced châssis de bogies fabriqués—ensuring you find the perfect balance of performance, durabilité, and value for your specific operations, veuillez visiter notre site Web www.railwaypart.com and know more about us.