Parameter Optimization And Energy-saving Of Mine Hoist System

Multi-rope friction hoist system is a significant type of mine hoist. And being characterized by small size, light, and outstanding ability in hoist it is widely used in medium and deep mine hoist.As is based on the principle of friction drive, one problem in multi-rope friction hoist with vital importance is anti-skid. The problem is worth to be paid high attention to and ought to be settled in advance in system design. Moreover, energy consumption and saving of the mine hoist system should also be focused, concerned and resolved.Aiming at the problem of system anti-skid, performance and parameters of system component and its affect on the non-slip safety is analyzed in the perspective of system hardware equipment. Then the limit and scope of parameters including limit of static tension, acceleration and deceleration etc. were deduced according to the basic theory of the famous Euler’s formula. In addition, safety standards and regulations in relation to system anti-skid was introduced, and the relationship between static tension constraint and other related safety standards or regulations was analyzed.Being long-term periodic operated, multi-rope friction hoist consumes large quantity of energy. It is a heavy load for the grid. There are numbers of working state of Multi- rope friction hoist, including upgrading the load, lowering the load, no- load running, full load running, running with acceleration, running with deceleration, or rather in case of brake. Nevertheless not in all the state above should the grid provide energy for the hoisting motor. For from the truth, under certain circumstances such as putting down the load at a constant speed or running in case of brake, the hoisting motor is working as a generator. As a periodic long-term energy-consuming load, it is of profound meaning once the renewable energy generated in operation was recycled and reused. C hosen for research in the subject, mine hoist system driven by variable frequency AC is taken as an example to calculate the energy consumed in a lift cycle and is compared with that consumed by system driven by asynchronous motor, of which the control of speed is realized by adding resistance in series in the rotor of the motor. Energy-saving performance of variable frequency powered system was demonstrated.Finally, the theories and principles of system design and optimization was put in used in a case of system design of mine hoist in Xinjiang. Besides, the energy consumed in a hoist cycle was analyzed and calculated in two different cases.