The length of the Iasi highway is 240 kilometers, the minimum altitude is 630 meters, and the highest is 2440 meters. The entire highway line spreads among the mountains and mountains, hovering and vacating over the sky, with 270 seats of bridges and 25 tunnels. Up to 55% of the domestic and foreign experts and scholars are recognized as one of the most difficult mountain highways with the highest engineering and technological content in China and even in the world. Therefore, they are called “high speed elevators†and “highway on the cloudâ€. Iasi’s high-speed terrain and harsh weather, combined with viaducts, long tunnels and continuous long slopes, greatly increase the complexity of driving, posing a huge challenge to vehicle safety and braking capabilities. At present, trucks in mountainous areas are generally used as a method of not using soil—brake-spraying and cooling device. However, due to high altitude and low temperature of Yasasi, the water-spraying device will cause the road to be slippery, and will result in November to March. Ice on the road is undoubtedly a great hidden danger and it is difficult to guarantee the safety of driving. Iasi Highway Test From the beginning of highway design to completion and opening to traffic, the highway transportation department has been actively seeking solutions. In August 2012, the Sichuan College of Communications and Chang'an University was commissioned by the transportation department to contact Shaanxi Heavy Duty Truck, Beijin Heavy Duty Trucks and Voith Company. At the Iasi Highway, whether Voith Hydraulic Retarder can be fully loaded The heavy truck was validated on a continuous long downhill for effective auxiliary braking. Voith , Germany, is the pioneer of hydraulic retarders and the world's most important supplier of hydraulic retarders. It has manufactured and sold more than 700,000 hydraulic retarders. Voith Turbo VR115CN Hydraulic Retarder has a maximum permissible input speed of 5,000 revolutions per minute, a rated braking torque of 3200 Nm and a weight of 70 kg. It is a safe and efficient continuous braking system that can be economically comfortable and wear-free. Brake for all types of trucks. The VR115CN retarder is a parallel retarder mounted on the rear left side of the transmission. During the braking process using the retarder, the kinetic energy of the vehicle is converted into heat energy, which is emitted through the heat exchanger of the retarder and the vehicle cooling system. In this way, there is no thermal decay of braking. Iasi Highway Test The driving route selected in this experiment is from the Touhsang Bodhisattva-Gangtang tunnel to the Shimian section. The entire section is a 51-kilometer downhill road with a height difference of 1,515 meters, a maximum longitudinal gradient of 4%, and an average longitudinal gradient of 3%. It is the longest expressway in China and the most dangerous section of the Iasi high-speed road. These large slopes pose serious challenges to road operation and transportation safety (especially in the winter, it cannot spray water on the hub). The road section also has a number of deceleration zones and a safe-haven lane for emergency stoppage of the vehicle after the brake has failed. As an important manufacturer of heavy trucks in China, Shaanxi Zhongqi and Beiqiu Zhongqi are concerned about the safety and economy of highway logistics transportation. In order to cooperate with Sichuan College of Communications and Chang’an University to complete this research, they have arranged their main models. Participated in the test of the Iasi highway. In order to be able to meet the actual transport conditions, the total weight of the traction vehicle tested reached the upper limit of the regulation, that is, 55 tons of full load. The operation of the Voith retarder is quite simple. As long as the handle switch is toggled or the retarder is started using the foot brake pedal, the retarder receives the electronic input signal sent from the control unit. Through the control of the control unit, the ratio The valve regulates the compressed air entering the oil chamber and presses the retarder oil from the oil chamber into the working chamber composed of a stator and a rotor. The rotor in the working chamber accelerates the oil and rotates on the stator, and the speed direction of the oil changes. It also reacts to the rotor. During this process, a reverse force is generated. As a result, the rotor of the retarder decelerates, and the braking force is transmitted to the entire vehicle through the meshing of the gears, thereby decelerating the vehicle. The use of Voith retarder and its downhill constant speed gear perfectly controls the speed of heavy trucks on the next long slope. In the test of the Iasi highway, the total traction of the truck was 55 tons. The heavy-duty truck completed the 51-kilometre continuous long downhill test at an average speed of 64 kilometers per hour without using the service brake. The engine speed was always maintained at 1,300 to 1,500 revolutions per minute. The use rate of the downhill constant speed gear of China Voith Retarder exceeded 75%, while the retarder used only 44% of its available torque; Shaanxi Automobile Heavy Truck Co., Ltd. under the same conditions, with an average speed of 56 kilometers per hour The tests were completed, the engine speed was maintained at 1500 to 2,000 revolutions per minute, the ratio of the retarder downhill constant speed gear reached 70%, and the retarder torque only used 40% of its available torque. The experiment shows that: Voith VR115CN type hydraulic retarder can use heavy trucks with a total haul weight of 55 tons without the use of service brakes. It can stably pass this domestic first at a speed of about 60 kilometers per hour. The long downhill slope completely solved the problem of heavy-duty trucks with long slopes. The results of the experiment were exciting but totally unexpected. Not only that, because of its braking mechanism and the difference from traditional service brakes, Voith Hydraulic Retarder can help users save tires, brake pads, fuel, and maintenance work hours while ensuring vehicle safety. Improve the economics of truck operations! Voith has always been adhering to its highly reliable engineering technology to provide China's heavy truck customers with superior products and services that meet the needs of localization. tempered glass table tops Gas stove with hot plate best welcome fashion top gas stove in saudi arabia 6 burner gas range cooking stove,gass cooker gas stove,portable gas stove butane,gas 6 stove 6 burner gas range cooking stove,gass cooker gas stove,portable gas stove butane Guangdong Puda Electrical Appliance Co., Ltd. , https://www.pokaeleca.com
