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Which method is more reliable for brake cooling?

Time:2022/5/13 10:23:22 Click on:872 Source:Darong traffic machinery Co., LTD

How to cool the braking system of the trailer is an old topic. When the trailer is carrying goods, it has a large inertia. If you step on the brake for a few times, the brake will heat up. If you use the brake frequently for a long time, it is easy to cause the brake to overheat, affect the braking performance, or cause tire burst or brake spontaneous combustion, affecting driving safety.

Especially for those car owners who often run on mountain roads or long downhill roads, how to achieve efficient cooling of the braking system under continuous braking is a thorny problem.

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

At present, the common solutions are mainly water spraying device, engine brake and hydraulic retarder, as well as the new inventions of various "great gods".

Today, Darong axle will introduce in detail the advantages and disadvantages of these brake cooling methods.

First, let's talk about some common:

1. Pour water to cool down.

The water cooling device belongs to a kind of folk invention, which is like an amulet for car owners who often run in the mountainous areas of Yunnan, Guizhou and Sichuan.

The price of water cooling is cheap, the installation is convenient, and the cooling effect is obvious. Therefore, it has been rapidly popularized and popularized in the industry.

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

However, with the continuous development of vehicle technology, watering and cooling gradually began to "fall out of favor". The reasons are as follows: (1) the weight of the drenching device is too large, often up to tons or even a few tons, which has a great impact on the cargo loading capacity and increases the transportation cost. In addition, it is easy to cause the frame deformation after long-term use.

(2) It is easy to cause the road surface to freeze, especially in the north. In the process of watering and cooling, the water falls on the road surface, which is easy to freeze and affect the driving safety. If the ice appears in the downhill section, it is more dangerous. Therefore, watering and cooling are prohibited on mountain roads such as Shanxi and Shaanxi in winter.

(3) Disc brakes have gradually become popular on trailers, but the water cooling device is not suitable for disc brakes, resulting in car owners having to choose other auxiliary devices.

2. Hydraulic retarder.

Compared with water cooling, liquid retarder is a device with higher safety. It not only has the function of constant speed control, and the braking is stable without impact, but also 90% of the braking is carried out in a wear-free state, which can effectively avoid braking overheating.

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

In addition, the liquid buffer has small volume and lighter self weight. It can also prolong the service life of friction plates, tires and other components, reduce the replacement frequency and save the cost of comprehensive vehicles.

In addition to playing a role in mountain road transportation, it can play the function of pre judgment braking and deceleration in toll stations, traffic lights, traffic jams and other road conditions, and has a wider application field.

However, the price of liquid buffer is too high, often tens of thousands or even tens of thousands of yuan, which is not a small amount for car owners, so the popularity is slightly worse.

3. Engine assisted braking.

Engine braking is one of the simplest forms of braking. Release the clutch and accelerator and put the transmission into forward gear to enter the engine braking mode.

However, engine braking has certain requirements for the owner's operation and technology. If the application is not skilled, it will also affect the effect of auxiliary braking.

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

Let's talk about those "new inventions":

1. Circumferential disc brake.

Many car owners may not have heard of it. You can take a look at the following diagram:

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

From the appearance, this kind of brake is more like the combination of drum brake and disc brake. The brake drum is used for braking, but part of the brake shoes are exposed in the air.

This kind of brake is designed with brake shoes on the inner and outer sides of the "brake drum". When the brake is pressed, the inside is extended outward, and the outside is also held inward.

According to the design principle, the brake has large braking force and good heat dissipation performance. An air guide is added in the middle. With the increase of wheel speed, the air guide will blow to the inside of the brake to help the brake heat dissipation.

However, these advantages only stay at the theoretical level. So far, we have not seen the large-scale application of this kind of brake in the market. In addition, although this kind of brake is called "circumferential disc", it has not been recognized as "disc" in regulations.

2. Cooling rib cast aluminum steel ring.

Car owners should understand the advantages of aluminum alloy. It is not only lighter than the steel ring, but also has better thermal conductivity. Coupled with the design of heat dissipation ribs and vents, it can have the effect of forced ventilation. In theory, the effect is good.

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

However, this design has few practical applications in trailers. One is the high price. In addition, when facing continuous long downhill, its heat dissipation effect may not be as good as expected.

3. Water circulation axle.

It sounds unidentified and sharp. In fact, it can be seen as an upgrade of watering and cooling.

Add water storage tank, radiator and pipeline on the axle. The water is driven by the electric water pump. The water enters the hubs at both ends from the pipeline inside the shaft pipe, and then enters the interlayer of the brake drum through the water separator for cooling. After the water temperature rises, it returns to the radiator through the water separator for water cooling, and finally returns to the water tank.

According to the design principle, such a device can realize water circulation and avoid drenching on the road.

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

However, for its heat dissipation effect, car owners do not buy it. One is whether the water will evaporate slowly after the water temperature rises. It is impossible not to add water; Another is whether the pot will boil when going downhill for a long time; And then there will be no dregs blocking the spray pipe with the water flow. Therefore, there is basically no news of this design in the market.

Based on the above methods, it can be seen that although the price is really unsightly, liquid buffer + disc brake may become the main force of the market in the future.

制动器降温哪种方法更靠谱?这些千奇百怪的发明你见过几个?

Darong disc axle is a relatively high cost-effective one in China at present. It adopts the domestic advanced "one-piece" heat treatment molding technology and medium frequency quenching treatment to improve the bending, torsion and deformation resistance. At the same time, it also takes into account the lightweight design, which is about 15% less than traditional products, which can fully help car owners save energy, reduce consumption and improve comprehensive operating income.

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