Mining Hoist Winch also divides the braking torque required by a winch into two stages for braking, realizing the first braking. The system produces the mine safety deceleration, ensuring the entire system braking, and finally the second machine. All the power is added to meet the maximum braking torque, which is to improve the safety of the system, that is, constant torque braking control. Since the first-stage braking torque, that is, the P-level value, will not change once it is set. For safety, generally the maximum load, the worst working conditions, full load decentralized industrial control to determine the P level value. Second, for the main well Mining Hoist Winch, a number of lifting conditions, the auxiliary shaft mining winch to increase the load, the working conditions change greatly, the full load is raised and lowered. In this way, the secondary braking often causes the emergency braking deceleration to be too large, which will cause the wire rope to slip beyond the anti-skid limit. For the single rope winch, the risk of the short rope is increased, thereby jeopardizing equipment and life safety.
