| The electro-hydraulic compound Subsea Control Module(SCM)is a control device,which is the most widely used in subsea production systems to control and monitor the operation of subsea production facilities.However,China is in its infancy in the design and development of electro-hydraulic compound Subsea Control Module,which is quite lagging behind developed countries.Therefore,it is important to develop a principle prototype of electro-hydraulic compound Subsea Control Module for improving the comprehensive strength of offshore oil and gas development in China.Based on the full investigation of the current states and progress at home and abroad,an electro-hydraulic compound Subsea Control Module principle prototype used in 1500-meter deep water is developed in this paper.Specific work is as follows:On the basis of clarifying the functional principle of the electro-hydraulic compound Subsea Control Module,the performance indexes and technical requirements are proposed.The mechanical components such as shell,butt plate,locking mechanism and pressure compensator are designed.According to the functional requirements of hydraulic system,the overall control scheme of the electronic control system is constructed,the components of hydraulic system are configured integrately and the key components are selected.According to the functional requirements of control system,hardware configuration and software programming are carried out.The oil passage structure inside the hydraulic integrated valve plate is designed,and the mathematical model of the flow field inside the oil passage is established.Fluent is used to simulate and analyze the flow characteristics of the hydraulic oil in the typical flow path(right-angled turns,"Z" turns and Craft holes)and the pressure loss in different flow paths.Then the relevant parameters of the hydraulic integrated valve plate are determined,and the pressure loss of each oil passage in the valve plate is simulated and analyzed by Fluent to verify that the pressure loss meets the system requirements.The structure design of subsea plate-to-plate hydraulic couplings is carried out,and the dynamic sealing structure is simulated and analyzed by Ansys Workbench and Matlab to determine the effect of compression ratio of sealing ring,thickness of sealing ring and insertion speed on the sealing performance.The structure design of subsea 4-core plate-to-plate electrical connector with double balanced membrane is carried out,and the mechanical models of electrical contacts are established.The contact pressure and insertion force are analyzed and calculated by the classical theory of material mechanics and Matlab.Ansys Workbench is used to simulate the contact of insertion / extraction process,and the deformation,stress and insertion / extraction force of the jack are obtained.A test system consisting of a test hydraulic station,a test bench,a master controlling station,an external signal generator and a manual high-pressure pump is built.The mechanical system test,hydraulic system test and electronic control system test of the prototype of the electro-hydraulic compound subsea control module are carried out.The datas and results of experiment are analyzed and summed up to verify that the prototype of electro-hydraulic compound subsea control module developed in this paper meets various design requirements and performance indicators. |
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