In recent years, disc axles and air suspensions have been "flourishing" in the freight market. Whether it is the strong push of laws and policies or the general trend of vehicle technology development at home and abroad, they have provided a solid foundation for the installation and use of the two.In some promotional materials, disc axles and air suspensions are directly called the "golden combination". This statement mainly comes from the unique advantages of the two:
1. Disc axles
The brake disc replaces the traditional sealed brake drum, which greatly reduces its own weight and expands and improves the cargo weight to a certain extent;The components of the braking system have been simplified, the system structure is simpler, and the braking response speed is faster;The exposed structure has high ventilation efficiency, faster heat dissipation speed, and is not prone to thermal attenuation. The open wheel end is not prone to water accumulation and has good water attenuation resistance.In a word, it is light weight, fast heat dissipation, sensitive response, and strong resistance to thermal attenuation and water attenuation.
2. Air suspensionUsing compressed gas as elastic medium, it has obvious advantages in self-weight, can obtain more loading space, and can also improve fuel economy and reduce comprehensive vehicle cost;Compressed air has better shock isolation effect, can greatly absorb bumps and impacts from the road, and ensure the constant height of the cargo compartment as much as possible, improve driving comfort, protect cargo, and reduce cargo damage;Air suspension can realize the lifting of a single bridge or a whole vehicle. When the vehicle returns empty, it can reduce tire wear and save fuel. In addition, it can also allow the vehicle to better adapt to cargo platforms of different heights, making it easier to load and unload cargo;Air suspension can also protect chassis components, with less impact and bumps, and the loosening of fasteners on the chassis is greatly reduced, and the service life of chassis components can also be extended to a certain extent.In short, it has light self-weight, excellent shock absorption, strong cargo protection ability, and can also realize single-bridge or multi-bridge lifting, saving comprehensive vehicle cost.When the disc axle is used with the air suspension, the advantages of both sides can be combined to achieve the effect of "1+1>2". This is also the reason why many owners who transport goods such as green pass, flowers, electronic instruments, hazardous chemicals, and fragile goods choose to use disc axles and air suspensions.Although the advantages are obvious, this "golden combination" is not without shortcomings. First of all, in terms of working conditions, the strength and rigidity of vehicle accessories are often proportional. If the weight of the goods transported by the owner is large, it may not be suitable for this combination. Even if it is barely used, the subsequent failure rate and maintenance frequency will add a lot of trouble to the owner.Secondly, there are many things that car owners need to pay attention to during use. For example, the braking response speed of the main suspension must match, water cannot be sprayed to cool down, overload transportation cannot be allowed, bad driving habits must be changed, and the self-inspection frequency needs to be increased under severe working conditions. Compared with traditional steel plate bridges, it is more complicated. In addition, if the road conditions that the car owner usually drives on are relatively complex, it is also necessary to use a hydraulic retarder, ABS or EBS system in addition to the disc axle and air suspension to improve driving safety.
