Research on Load Matching Characteristics and Torque Experiment of Soft Start for Hydro-Viscous Drive

In order to study the load matching characteristics of the hydro-viscous drive soft start of scraper conveyor under different working conditions, a mathematical model of load torque, hydraulic viscous clutch bearing capacity, and hydro-viscous drive torque are established, the influence of different load starting speed on the soft start characteristics of scraper conveyor are revealed. Based on the improved radar chart method, the matching evaluation system consisting of matching evaluation indexes and evaluation functions is established, and the matching schemes of four starting speeds under different working conditions are quantitatively evaluated. The results show that as the load increases, the matching effect between S-type start and sinusoidal start with hydro-viscous drive is better. Simultaneously, a torque testing platform for hydro-viscous drive is established, the torque and friction characteristics of the friction pair of the controllable starting device are analyzed, and the control characteristics of different starting target speeds are studied. Through experimental research, it can be concluded that under heavy load conditions, the speed curves of S-type start and sinusoidal start have good compliance with the theoretical speed, short response time, and quickly reach a stable state. Under light load conditions, the torque required by the load is small, and the clutch fully meets the system torque requirements, and the matching effect of using linear start and parabolic start is better. By reasonably controlling the starting speed of the load and using the comprehensive evaluation function determined by the improved radar chart evaluation method, the advantages and disadvantages of the soft start matching scheme can be accurately quantified. The research results provide a theoretical basis for the optimal control scheme of the soft start of the scraper conveyor under different working conditions.