Research on the Thermal-Structure Coupling Applied to Wet Brake of Mining Vehicles

In order to reveal the temperature and stress change of wet brake under emergency working conditions, a wet multi-disc brake used in mining machinery was taken as the research object. The thermomechanical coupling simulation model of a wet brake was established, and the temperature and stress change of the friction disc under emergency working conditions were analyzed through a bench experiment. The temperature and stress change of the friction disc of the simulation model are compared to the experimental one to verify the correctness of the model. The results show that (1) There is a coupling relationship between the temperature field and stress field during emergency braking. In the process of braking, the variation trend and spatial distribution law of the temperature field and stress field are very similar. (2) When the brake is applied at 40 km/h, the temperature rise of the friction disc reaches 46.8°C during the process of emergency braking conditions. Thus braking at the speed of 40 km/h should be avoided. (3) The temperature change of the friction disc is more obvious in the radial direction than in the circumferential direction.