|
CSME 2019/06
Volume 40 No.3
:
221-229
|
|
Virtual Prototype and Experiment Study on Mining Truck Air Brake System
Xiaobin Fana and Zeng Songa
aSchool of Mechanical and Power Engineering, Henan Polytechnic University, 454000 Jiaozuo, China
|
Abstract:
Accurate calculation method of drum brake braking torque of mining truck air brake was studied in this paper at first, then hydro pneumatic suspension features and the tire characteristic parameters were studied. The dump truck vir-tual prototype model was established, service brake and emergency brake performance were simulated. The simula-tion results of braking deviation show that the rear wheel braking force is greater than that the front wheel. Under cor-nering braking condition, the brake deviation increases about 85 mm for each 5% difference between the left and right brake forces of the front wheel; 5% difference between the left and right brake forces of the rear wheel, the brake deviation increases about 120 mm. Braking locking sideslip simulation shows that when the front wheel is locked, the side slip of the vehicle deviates from the track up to 2m, which is very dangerous in the mountain mining area. The truck performance field tests were carried out such as ser-vice brake, emergency brake, hydraulic retarder and brake system response time, etc. The results show that the truck braking performance can also be improved. Because brak-ing pressure rise time is slightly long, that it can be improved by gas circuit improvement (equipped with the quick-acting valve and wet-road valve, etc.), and the superiority of the improved gas path is also verified by virtual prototype sim-ulation and real vehicle experiment. The truck braking torque can be further promoted by increasing air pressure or brake friction coefficient or brake design rationality. Through the implementation of these methods, the braking performance of the mine dump truck has been improved sig-nificantly.
|
|
Keywords: mining dump truck, virtual prototype, service brake, emergency brake, retarder, air brake.
|
Download PDF
|
|
*Corresponding author; e-mail:
|
©
2019
CSME , ISSN 0257-9731
|