电力推进船舶螺旋桨模拟负载的研制-轮机工程专业论文.docxVIP

PAGE PAGE VI III III The Research and Development of the Marine Electric Propulsion Propeller Simulated Load Abstract With the rapid development of the technology of semiconductor, converter and computer control, electric propulsion has become the development direction of the ship propulsion because of the benefits of energy efficient, environmental protection, easy in operation and to control. Shipbuilding industry and research institutes at home and abroad have increased research efforts of marine electric propulsion system. Propeller as an important part of the electric propulsion system, its load characteristics definitely affect the key technology research of integrated electric propulsion system. Therefore, this topic is based on the construction project of the ship integrated electric propulsion system research platform in Marine Engineering Institute of Jimei University. The research of the propeller load of physical simulation system has a very important significance for studying deeply of electric propulsion system. In this paper, the propeller load is the research object. According to the working characteristics of asynchronous motor and using the technology of PLC ,converter and computer control, the experiment system about simulating accurately propeller working characteristics under ship in different working situation can be developed and the ship integrated electric propulsion system research platform can be completed.This paper main work are as follows. The basic parameters of the propeller, the formula of thrust and torque, the open-water propeller characteristic chart and the interaction between ship and propeller are described. Three important propeller torque characteristics are analyzed. The propeller thrust characteristic and ship resistance characteristic are explained. Advantages and disadvantages of different types of propeller simulation system are analyzed. For existing power propulsion system, the propeller load system constitution of