Conceptual Design Of Luffing System Of Mobile Harbor Crane

Evolved from mobile crane, mobile harbor crane is a new type of crane, which is applied to freight handling, stacking, cargo transportation task, and easy for transfer. Working circumstance of mobile harbor crane is complicated, working grade is high, during the procession of luffing, load is required to move horizontally, and a smaller cylinder force is of benefit. Hence, the performance of mobile harbor crane is directly influenced by the design of luffing system. The design of luffing system of mobile harbor crane is studied on in this paper, key objective of the design is analyzed, mechanical model of luffing system is built up, calculation of luffing system is studied system in analytical method, and finally design software of luffing system is programmed. The main jobs of this paper are as follows:(1) Compensating pulley method is analyzed, mechanical model is built up, the design of pulley location is studied, and calculation method of load movement trajectory is presented in this paper.(2) The main factors that influenced the lifting capacity of mobile harbor crane is analyzed, mechanical models of lifting capacity are built up according to the overturn resistant stability and boom mechanical properties of mobile harbor crane, calculation method of lifting capacity is presented in this paper.(3) Calculation method of tri-joint design of mobile harbor crane is studied, mechanical model of luffing cylinder is built up, and calculation method of cylinder force and stability is presented in this paper.(4) Design software of luffing system of mobile harbor crane is programmed, the luffing system of YHC280mobile harbor crane is designed, and the parameters of luffing system is obtained by the design software, which proved the applicability and rationality of the software.