A hydraulic system energy analysis method for energy-saving design of crane lifting mechanism

Abstract During the lifting process of cranes, the lifting mechanism usually experiences significant energy loss, which is detrimental to the lifespan of the lifting mechanism. Therefore, it is particularly necessary to study energy-saving methods for the lifting mechanism of cranes. This article takes the 90 t mobile overhead crane as an example to establish a model of its lifting mechanism hydraulic system. An analysis was conducted on the working energy of the lifting mechanism of the crane, and the energy flow and loss situation of the lifting mechanism of the crane were identified. Then the energy loss process was analyzed, and the energy-saving potential of the crane lifting mechanism was demonstrated through data calculation. According to the results, during the descent stage of the crane lifting mechanism, a large amount of gravitational potential energy is converted into thermal energy consumption of the hydraulic transmission system. Subsequent energy-saving designs for the crane lifting mechanism can add energy feedback devices to this link, with an energy-saving effect of over 40%.