From 2020, all three axle railcars and warehouse grid semi-trailers leaving the factory will be forced to install disc brake and air bag suspension. The implementation of the new regulations has been more than a year. The majority of drivers and owners have different views on this. Is it necessary to force the installation of disc brake bridge and air bag suspension?

Let's take a look at the difference between drum brake bridge and disc brake bridge

The heat sink of disc brake is directly exposed in the air. The heat dissipation is better than drum brake. The reaction speed of disc brake is faster than drum brake. The brake is more sensitive. Combined with ABS and EBS systems, it can effectively shorten the braking distance, which is not a little better than drum brake.

Although the heat dissipation of the disc brake is a little better than that of the drum brake, and the heat attenuation performance is better than that of the drum brake, the brake pads of the disc brake cannot be drenched with water. If the brake pads are overheated, the friction will be reduced and the braking distance will be greatly increased. In extreme cases, if the overheated brake pads are directly drenched with water, the disc will even be broken. The drum brake is different. Many old drivers love the drum brake because it can pour water to cool down and brake for a long distance. For example, in mountain roads such as Yunnan, Guizhou and Sichuan,

Moving is a hillside road of tens of kilometers. In the disc brake bridge, Cheng can't stand braking for such a long distance. The overheating and heat attenuation of the brake pad will be very serious, and even lead to brake failure.

Airbag suspension

The main bearing medium of air bag suspension is air. Compressed air is rushed into the sealed tank and the elasticity of air is used to shock the trailer. Compared with rigid suspension, air bag suspension is more comfortable. However, in the case of domestic freight, when the air suspension is under full load, there will be some nodding or tailing when braking or starting, So this is a test of the driver's driving experience.

Rigid suspension

Rigid suspension uses steel plate as the bearing medium. Under full load, the reliability of rigid suspension is better than air suspension. If air leakage is caused by some air circuit faults, air suspension cannot continue to drive on the road. However, air suspension is still the first choice in the transportation of goods with high requirements such as precision devices and tank cars.

In January 2020, when the national policy forces the installation of disc brake and air bag bridge on three axle rail cars and warehouse grid semi-trailer, we should select the appropriate Trailer according to the purpose of the trailer when purchasing a new trailer.