How to use a trailer disc axle without any problems?

Since the introduction of GB7258-2017, the demand for disc axle in the domestic market has been rising. According to the regulations, since January 2019, the new semi-trailer for the transport of dangerous goods must use disc brake; From January 2020, three-axle rail-plate and barrel-type semi-trailers will also be equipped with disc brakes.

Now three years have passed, more and more vehicles have been installed disc brake, can be used to drum brake owners, the daily application of disc brake there are many different, today we will take a simple inventory together.

1. Advantages of disc axle

Compared with drum axle, disc axle is characterized by light weight, fast heat dissipation, sensitive response, strong heat attenuation and water attenuation.

(1) The 360° brake drum was banned, and the self-weight was greatly improved; At the same time, there is no need to install the drenching device after the installation of disc axle, which can further improve the number of vehicles carrying cargo.

(2) The components of the braking system are simplified, the structure is simpler, and the braking response speed is faster. Under emergency braking, ABS and EBS systems can give full play to the optimal performance.

(3) Open wheel end design, high ventilation efficiency, fast heat dissipation, frequent continuous braking is not easy to appear heat attenuation, after the water section of the wheel end is not easy to water, water attenuation resistance performance is good, after the water to step on the brake pedal several times can restore the braking performance.

(4) More convenient maintenance, replacement of friction plate only takes a few minutes, can improve vehicle operation efficiency, reduce maintenance caused by outage time.

2. Disc Trailer axle is not suitable for all working conditions

Disc axle has obvious advantages and disadvantages can not be ignored.

Because of its structure, its braking strength is not as strong as the drum brake bridge, which restricts the use of disc axle conditions to a certain extent. Some loading mass or overload, partial load, is not suitable for the use of disc brake bridge.

The open wheel end leads to its brake disc, brake pad and other parts exposed, vulnerable to the impact of splashing soil, sand and stone, to a certain extent as the drum brake bridge resistance, in the mud, Gobi, pothole, bumpy, sand and stone field environment is not very suitable.

3. Precautions for the use of disc axle

(1) The tractor needs to be equipped with hydraulic retarder or other auxiliary braking devices, which is also in line with the provisions of JT/T1178.2 to improve the safety of disc braking.

(2) It is suggested that tractor and Trailer be equipped with ABS/EBS system, which is also a way to improve the braking efficiency of vehicles and enhance driving safety. Especially, disc Trailer axle braking speed is fast, which can give full play to the use efficiency of ABS/EBS.

It should be noted that the purpose of installing liquid softening ABS/EBS is to improve driving safety, not to deal with vehicle inspection, so it is strictly prohibited to release liquid softening auxiliary braking or close ABS/EBS system during driving.

(3) It is prohibited to install flood cooling devices. Disc axle can realize high-speed heat dissipation through air flow. If you are worried about its poor heat dissipation, you can improve it by installing auxiliary braking. It is essential not to directly shower water to cool down, because the disc axle brake disc is completely exposed, if you directly pour cold water under high temperature condition, it is likely to lead to cold cracking, which seriously affects driving safety.

(4) Pay attention to self-check after bad road conditions. As we have mentioned above, disc axle should not be used in bad road conditions. If the vehicle is driving on gravel road, mine, field and other environments, it is necessary to check the wheel end and brake disc to see if there is foreign body damage and prevent it from happening.

4. Disc axle main hanging match

5. Application field of disc axle

(1) Three-axle rail-plate/warehouse grid vehicles: These two types of trailers are axle models which are subject to explicit laws and regulations and shall be equipped with disc Trailer axle; otherwise, registration or on-road driving will be affected.

(2) Precision instruments/valuables transportation: the particularity of this kind of goods on the vehicle and the transportation process of the requirements are more strict, the application of disc axle can make the brake more sensitive, more stable, to avoid the goods bump or large vibration.

(3) Transportation of dangerous goods: hazardous chemical transport vehicles have higher risk factor than ordinary cargo vehicles. The use of disc axle can reduce accidents caused by uneven distribution of braking force and slow heat dissipation of brake as much as possible.

(4) green pass/flowers/fragile goods transportation: This kind of goods to goods loss requirements, suitable for the disc brake with air suspension, can not only in the vertical buffer from the road bumps, but also enhance the horizontal direction of linear stability, so that the goods by a full range of protection.