How to cool down the drum trailer axle to be reliable?

The water spray cooling device is often seen on drum brakes in running mountainous areas. When driving in mountainous areas, there are many ups and downs and sharp turns, especially on long downhill roads. It takes a long time and frequent braking. The brakes are prone to thermal attenuation and lead to brake failure. Therefore, many car owners choose to install water showers to cool down the brakes trailer axle.

However, as the temperature continues to drop, many cities in the north have issued bans on the use of showers. For example, Shaanxi and Shanxi launched a publicity campaign to ban the use of showers in October, and carried out inspections in some service areas.

1. Why is the sprinkler banned?

The water spray cooling device is a kind of folk invention. It is cheap, easy to install, and has a relatively obvious cooling effect. Therefore, it has been rapidly popularized and promoted in the industry as soon as it came out, and it is even regarded as a driving amulet in mountainous areas.

While the sprinkler can cool down the brakes, it also brings some problems, the most obvious of which is that it is easy to cause the road surface to freeze. Especially in the north, the sprinkler sprinkles water on the road during the cooling process, forming a thin layer of ice under the action of low temperature, which seriously affects driving safety. In particular, the process of cooling down with water generally takes place on downhill roads. Once freezing occurs, the risk factor is higher. Therefore, some mountainous roads in the north are explicitly prohibited from using sprinklers in winter.

In addition to causing icing on the road, with the continuous development of vehicle technology, other shortcomings of the sprinkler device are gradually emerging. For example, the weight of the sprinkler device can easily increase the weight of tons or several tons, which can easily lead to deformation of the vehicle frame and easily affect the cargo loading capacity of the vehicle, which is not conducive to improving operational efficiency. In addition, on some vehicles equipped with disc brakes, because the brakes are exposed and unwrapped, they are easily deformed or cracked when exposed to cold water when they are red and hot, so the water shower is not suitable trailer axle.

2. In addition to sprinklers, what measures can drum brakes choose to cool down?

If the owner often runs mountain roads or long downhill sections, he can use a hydraulic retarder in addition to the braking system. Hydraulic brake is an auxiliary braking device with constant speed control function, smooth braking and no impact. It is small in size and light in weight, and 90% of the braking is carried out in a wear-free state, which can effectively avoid brake overheating and play the function of predictive braking and deceleration in road conditions such as mountain roads, toll stations, traffic lights, and traffic jams.

Secondly, car owners can make full use of auxiliary braking methods such as engine braking and exhaust braking to minimize the frequency of braking for a long time; plan the driving route well, control and stabilize the speed of the vehicle in advance when entering a long downhill, keep a certain safe distance from the vehicle in front, learn predictive driving, and avoid overheating trailer axle of the brake drum or brake pads.

Cultivate the habit of checking the vehicle before leaving the vehicle to ensure the stability of the performance of each component, especially the braking system, and avoid overloading the transportation to avoid overloading the braking system.

After the vehicle brakes for a long time, it can stop in a safe area and wait for the brake drum, brake pads, tires and other components to cool down automatically; for the area where the cooling pool is designed, the owner can wait for the brake system and tires to cool down to a certain level before entering the water to cool down.

For car owners in the south, especially those who often drive in the southwest, there are many sharp bends, steep slopes, and long downhills on the expressway, and the brake cooling device can be said to be indispensable. Since there are no seasonal restrictions on the use of sprinklers in the southern region, car owners can choose flexibly according to the actual situation when choosing sprinklers or liquid slow.