The Design And Research Of Hydraulic Pump Station Of Ship Comprehensive Hydraulic Propulsion

At present, China's shipbuilding tonnage has been ranked in the forefront of the world, undertake new ship orders highest in the world. Ship is the primary vector of shipbuilding and shipping industry. As the heart of the ship,the main propulsion device's performance determines the merit of the whole ship's performance. However, with the development of high-speed, professional, safety and environmental protection ship, the shortcomings at mobility, security, reliability and power to weight ratio of area of the existing method of propulsion became more and more obvious, people more and more want a new kind of ship propulsion to meet the booming shipbuilding industry.The passage is mainly research and design the hydraulic pump station of the ship comprehensive hydraulic propulsion, specific work as follows:(1) According to the advantages and disadvantages of the existing ship propulsions and ship comprehensive hydraulic propulsion, it proves the research of ship comprehen-sive hydraulic propulsion has a positive effect to the development of ship industry.(2) By the design of the pump station of the ship comprehensive hydraulic propulsion, the design of the pump station is mainly from the flowing four aspects:1) Reasonable selection of hydraulic pumps; 2) Comprehensive use of the power of the hydraulic pump station; 3) The economic of the combined operation of the pumps; 4) The reliability of the combined operation of the pumps.(3) Based on the research of the hydraulic pump station, the passage designed a kind of hydraulic pump station which is composed of a quantitative pump-variable pump in parallel. With the use of this kind of hydraulic pump station, the passage designed the system diagram of the ship comprehensive hydraulic propulsion, and its variable control mechanism was designed, and analyzed how the variable control mechanism to control the flow of hydraulic system.(4) Using the power bond graph, modeling the designed hydraulic pump station of the ship comprehensive hydraulic propulsion and selecting the components of the system. Setting up the block diagram of hydraulic pumping station with the use of Matlab/Simulink simulation software. At last, the conclusion are:1) It can realize stepless speed regulation with the use of the hydraulic pump station which is composed of a quantitative pump-variable pump in parallel, it has the same function with the hydraulic pump station which is composed of variable pumps in parallel; 2) The higher the pressure of the system, the greater the dynamic overshoot of the hydraulic pump station, the worse the stability of the hydraulic pump station; 3) After the flow rate increases, the system stability time will extend, and it will increase the impact on the system; 4) The greater the load torque, the greater the power lose of the hydraulic pump station, it will lead to the efficiency of the system reduced.The above conclusion can proved:The pump station which is composed of qua-ntitative pump-variable pump in parallel can meet the requirements of the ship compre-hencive hydraulic propulsion, the system can provide the necessary pressure and flow, it has good operational and stability, the whole system average power of about 0.8.