Dissertation > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Earth Science Instruments > Oceanographic survey,observation instruments

Research on the Deep-ocean Pressure-compensated Oil-filled Motor

Author ChenHao
Tutor LiShiLun
School Zhejiang University
Course Mechanical and Electronic Engineering
Keywords Deep sea motor Spring pressure compensation Seal Fluent simulation Deep - sea simulation test
Type Master's thesis
Year 2007
Downloads 210
Quotes 3
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With the continuous development of China's marine economy, marine monitoring, exploration and development capabilities continue to improve, demand for deep sea motor also reflected more and more obvious. Abroad only a few marine research institutions according to their own needs, their own trial suitable for high ambient pressure to adapt to small power underwater brushless DC servo motor prototype for the use of their own research; market products, specifications and quantity are rarely, and only in Europe, America, Japan, a few companies production. Domestic completely dependent on imports, not yet a formal product. In view of the above situation, the thesis adaptive design of the deep-sea pressure oil-filled motor. The so-called \If the the motor water depth of 2000 m, the internal and external pressure is 20MPa. Deep-sea pressure adaptive oil-filled motor can replace the the complex underwater adaptive hydraulic system, to directly drive operating machinery perform parts action, you can simplify the institutions and structures of the underwater system, reduce the the underwater system's weight multiplied system The reliability can be greatly improved. This thesis is the spring pressure compensator to the deep sea motor compensation sea deep water pressure, as well as due to the pressure compensation produced a series of key technical issues, and their own design and development of a system to test the efficiency of the motor in a hyperbaric chamber environment reach to grasp, monitoring the deep sea motor operating characteristics of the underwater target, create the conditions for further expansion of deep-sea motor specifications, and mass production. The thesis is divided into five chapters. The first chapter is summarized research meaning, purpose, as well as domestic and foreign-related research situation. The second chapter expounds the motor structure, sealed optimization design method. The brushless DC motor as the main body, diversion design of the permanent magnet rotor, the stator armature winding by vacuum epoxy potting ensure minimize churning power losses caused by the structure of the motor rotor. Prototype development stage, taken with the oil and power supply integrated program to reduce the requirements for tightness. Chapter hydrodynamic modeling study, a finite element model of the establishment of a permanent magnet rotor is rotated to stir the oil. Comparing the theoretical data, simulation data and the actual data differences fixed the rotor annular gap the size and medium oil viscosity, viscosity-temperature, the sticky pressure index is the impact of the deep-sea pressure adaptive motor whether the operation of even the efficient operation of the important factors in the deep ; media and select the transformer oil as the oil-filled motor oil. The fourth chapter is the deep ocean pressure simulation experiment design and research. The detailed analysis of the power distribution of the test system environment, by experiment under various environments, Comparative experimental data obtained the motor power loss of the composition as well as the actual work in the case of analog deep efficiency, identify the design high efficiency of the key points of the deep sea motor. Chapter summary views on the optimization of the existing motor, and future work will need to conduct in-depth research.

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