| With the development of modern shipping towards macro-scale operation technology, specialization and speed-up, as the traditional propulsion mode, the diesel propulsion mode can not appeal to the modern shipping, so that new propulsion mode with good maneuverability and performance are urgently needed to meet the demands of modern shipping. Afterwards, ship electric propulsion, superconducting electromagnetic propulsion, water-jet propulsion and hydraulic propulsion are proposed, where electronic technology and magnetic fluid technology are applied into shipping propulsion devices. However, these drive mode show some deficiencies. Thus, in this paper, the ship hydraulic drive with great potential is presented, with analyzing the advantages and disadvantages of each drive mode and applying the fluid drive technology into shipping.Based on ship propulsion principles and the hydraulic propulsion technology, a system design plan of the ship hydraulic propulsion is established, and a physical model is designed to validate its feasibility, with the method of model test. The similarity criterion of screw propeller model is determined by the method of dimensional analysis, and inertia mass is selected to simulate the screw propeller;the diesel is substituted by the electromotor as the main engine. Then, a suit of experimental devices is established for studying further the ship hydraulic propulsion.With combining the power flow principle, the hydraulic system model of the ship hydraulic drive system is proposed by the Power Bond Graph. The main engine and screw propeller model are proposed according to their performances. Then, the hydraulic drive system model is presented. Simulation experiments by Matlab/Simulink is conducted, and the results indicate that the ship hydraulic drive in is a drive mode with good performance, which provides the theoretical base for developing further the ship hydraulic drive. At last, the research is summarized and prospected in this paper. |
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