Research On Characteristics Of Dual-Power Synthesis System Of Belt Conveyor

With the vigorous development of China’s industrial modernization,the belt conveyor,as the most suitable equipment for cargo transportation,has been widely used in various fields such as coal,mines and ports due to its outstanding advantages such as simple structure and stable operation.For long-distance,high-capacity belt conveyors,the ideal starting condition is no-load start-up.However,in real working sites,it is inevitable that some faults,power failures,etc.will occur,causing the belt conveyor to stop during the process of carrying the cargo.When the fault is handled,the belt conveyor needs to be restarted again.At this time,the belt conveyor is started under heavy load or even full load,and the required starting power is large.In order to meet the power requirement of the extreme working condition such as full load start-up,the installed power is much larger than that required for normal operation,resulting in the belt conveyor is working in the inefficient area during the long-term stable operation,and a lot of energy is wasted.Therefore,a new type of dual-power synthesis system is proposed for belt conveyor,in which a hydraulic motor is connected in parallel with the main drive motor to assist the starting process.In this way,the installed power of the main motor can be reduced,and the energy consumption can be reduced as well.In order to better analyze the characteristics of the dual-power synthesis system,the main AC motor frequency conversion drive system model,the auxiliary hydraulic drive system model,the conveyor model,and the power synthesis device model were established using AMESim simulation software.Finally,the whole machine simulation model of the belt conveyor dual-power synthesis system is obtained.Through the conveyor tensile and the 21 m belt conveyor prototype machine dynamic start-up process,the correctness of the conveyor belt model and the variable frequency speed control drive system model are verified.Finally,based on the whole machine simulation model of the belt conveyor dual-power synthesis system,the simulation analysis of the belt conveyor under no-load and full-load conditions are carried out.It can be concluded that under the no-load condition,the belt conveyor can achieve a good starting process and keep stable operation by relying on the main motor.Under the full load condition,the rotation speeds,the torques and the powers of the main motor and the auxiliary hydraulic system can be synthesizing device,and good cooperative work can be realized to jointly drive the belt conveyor to complete the starting process.After the starting process is completed,the hydraulic system quits the work,and the main motor drives the belt conveyor to operate stably.Therefore,the installed power of the main motor is reduced to a reasonable range,and in the long-term stable operation of the belt conveyor,the main motor works in the high-efficiency area,which could significantly reduce the energy consumption and save resources.Therefore,it is concluded that the belt conveyor dual-power synthesis system has remarkable feasibility and practicability.