Should the trailer axle choose disc or drum type?

Under the implementation of the national standard GB7258, the tractor-trailer is also affected by no small amount, in addition to the truck charges to be charged according to the axle, another important standard is that many trailers factory to standard the axle of the distribution brake and air bag suspension.

Most of the trailers we are running on the road now are rigid suspension and drum brakes, if the newly registered trailers are all changed to disc brakes and air bag suspension, the cost of car owners will be much higher.

The picture is disc trailer axle and drum trailer axle, the following first talk about the difference between disc brake and drum brake, the most fundamental difference between the two is the difference in heat dissipation, disc brake heat dissipation is much better than drum brake. Nowadays, the car is basically the disc brake, and some models are drum brakes, but they are basically used in the lowest matching models.

In fact, the advantage of the drum brake is cheap, the materials and accessories of the drum brake are very cheap, and the speed of heavy trucks on the road is not too fast, and the brake shoes as consumables will not be lost too fast, so now many trailers are still using the drum brake.

Disadvantages: Although the drum brake brake is very strong, but the thermal attenuation is obvious, because the drum brake heat dissipation is poor, the brake drum will become smaller after thermal expansion and the friction surface of the brake pad, and the thermal attenuation will be more obvious after continuous braking, which will also lead to brake failure.

As shown in the figure, the heat dissipation of the disc brake is much better than that of the drum brake, and the continuous brake will not cause thermal attenuation resulting in brake failure, because the brake disc of the disc brake can be directly exposed in the air, unlike the drum brake, which is closed in the trailer axle.

Then the disc trailer axle brake is responsive, which can let you brake as often as the old driver, so it is more in line with the working environment of the ABS/EBS system, the force of the disc brake is more average, and it can also automatically park.

Disadvantages: The price of the disc trailer axle is a little more expensive than the drum trailer axle. In the laboratory, under the same conditions, the braking force of the disc brake is less than that of the drum brake, but the general disc brake has a matching auxiliary brake system, such as ABS, etc., so with the support of other auxiliary systems, the effect of the disc brake is much higher than that of the drum brake.

At present, most of the trailers in China still use drum trailer axles, and the ones that use disc trailer axles are generally trailers that transport precision instruments.