Now that logistics and transportation are moving toward more efficient and economical models, various high-speed high-powered tractors are also emerging. As the speed of the vehicle is getting higher and higher, reducing the wind resistance of the vehicle has important implications for improving the economy of transportation. For semi-trailers, there are four major areas that generate air resistance: the windward front, the gap between the tractor and the trailer, the chassis section, and the trailer. Today's trucks have been designed to take into account the reduction of the drag coefficient, but in addition to the addition of a shroud and a side deflector at the top of the cab, some other flow guide components are rare for some reasons. In addition to the installation of some deflector components for the tractor, reducing the wind resistance of the trailer also contributes greatly to economic efficiency. In Europe and the United States, where road transportation is well-developed, not only has the guide units been installed on the tractors, but also many measures have been taken to reduce the wind resistance on the trailers, from large-scale design to fender optimization. Let's take a look at some measures to reduce the wind resistance of trailers. Due to the limitation of cargo space and size, it is very difficult to make great changes in the shape design of the trailer. Some sealed box semi-trailers in Europe changed the shape of the top and were designed to be more aerodynamic. For example, the Teardrop 2.0 trailer uses a curved roof design, and even the front of the car has a curved design. Although the arc-shaped trailer has obvious fuel-saving effect, the height of the pallet packaging is limited due to the limitation of the roof shape. The domestic courier giant SF Express also began to consider shortening the distance between the trailer and the cab when choosing a trailer. In addition to the Scania with side skirts on the front, the back of the trailer was also made of a flat surface. Sealed box trailers, and the front of the trailer is also equipped with a front shroud, to a certain extent, reduce wind resistance and reduce fuel consumption. Reducing the wind resistance on the chassis of the trailer is a more difficult part. The most common is to install side skirts on both sides of the trailer. For example, the CIMC layer developed a trailer trailer diversion system that diverts the airflow through the chassis through side skirts and also acts as a side protection. In addition, a concave diversion groove is arranged on the tail deflector to guide the air flow along the groove behind the traffic flow without causing turbulence in the rear of the vehicle. Some side skirts designed by foreign countries directly cover all the trailer tires, making the entire vehicle look more airtight, and the airflow will not scurry into the chassis to increase the wind resistance. In order to reduce the wind resistance of the trailer chassis, a U.S. company is developing another type of flow guide assembly. The new aerodynamic device is mounted under the crossbar of the trailer, in front of the trailer axle, and the entire device looks like an arrow. This device can disperse airflow in axles, suspensions, and wheels to improve the aerodynamic performance of the vehicle, but the passage of such components is yet to be verified. Apart from the side skirts, witty foreigners did not let go of tires and fenders. Kenworth Trucks has introduced a trailer equipped with a large number of diversion components. It not only uses a single tire with an automatic deflation system, but also has a transparent material cover on the hub. Not only protects the deflation system, but also reduces the wind resistance. At the same time there is a fender in the "Lace" style, which uses a hollow mesh structure. In the rainy days, the rainwater thrown by the wheel hits the ordinary fenders, which is prone to rain and fog, affecting the sight of the rear car. This hollow structure can prevent splashing of water droplets, will not produce rain and fog, and ensure the clear sight of the rear vehicle. In addition, the hollow structure has a small upwind area and can reduce air resistance. Another component is the trailer tailgate, which reduces the air resistance of the vehicle by guiding the airflow at the tail of the trailer. However, this device will have some impact on the efficiency of loading and unloading the trailer. Wabash, the largest trailer company in the United States, introduced their fifth aerodynamic device called AeroFin-XL Tail. The tailgate's expansion and contraction is automatic, like a simple sliding door, so it does not require the driver to operate. When loading and unloading goods, it will not affect the entry and exit of goods, which is very convenient. ◠Postscript Although China's logistics and transportation develops rapidly, there is still a gap between the transportation equipment and the developed countries, and the promotion and use of some diversion components are still subject to various restrictions. However, with the advancement of technology, it is believed that some equipment that meets the national conditions will eventually emerge. Machinery And Equipment Parts,Metal Pipe Clips,Metal Tube Clamp,Clamp Metal Ningbo Metal Sharing Supply Chain Management Co., Ltd , https://www.customsharing.com
