Design And Simulation Research On The Hydraulic System Of Ultra Deep Water Pile Hammer

Compared with the suction pile,the penetration pile has a high bearing capacity and a wide range of applications,which plays an extremely important role in deepwater oil and gas development.Ultra-deepwater piling hammer is the key equipment necessary for deepwater penetration pile installation,but it is exclusively monopolized by German MENCK company,and the relevant products are only rented but not sold,which is the key equipment of "necking".Therefore,it is necessary to design a set of ultra-deepwater piling hammers with independent intellectual property rights to meet the actual engineering needs of China.Ultra-deepwater piling hammer is a very complex electromechanical-hydraulic integration equipment,the hydraulic system is its key component,the hydraulic system on the comprehensive performance of ultra-deepwater piling hammer is crucial,the key parameters of the hydraulic actuating element are not only related to the operational stability of the whole set of equipment but also has a great impact on the piling efficiency.Therefore,it is important to carry out the design and simulation research of the hydraulic system of ultra-deepwater piling hammer.In this paper,according to the overall requirements of the ultra-deepwater piling hammer,this study determines the overall scheme of the hydraulic system,including the driving mode,working mode,buffer protection mode,etc.;the hydraulic system is designed and the working principle diagram of the hydraulic system is drawn;the key parameters of the hydraulic system are theoretically calculated according to the technical parameters requirements;and the hydraulic components are optimized for selection.Based on AMESim professional hydraulic simulation software,establish the simulation model of the hydraulic system key structure,integrate the hydraulic components based on the hydraulic system schematic diagram and configuration parameters designed in this paper,build the simulation model of the hydraulic system of ultra-deepwater piling hammer;according to the actual parameters of hydraulic components such as cylinders and valves in the system,set the main parameters of relevant components using equivalent calculation and approximate calculation,and verify through simulation analysis The modeling rationality is verified by simulation analysis;the influence law of the main control valve structure parameters,hydraulic cylinder structure parameters,two-way cartridge valve structure parameters,the maximum set pressure of relief valve,the presence or absence of high-pressure accumulator,hydraulic oil type,etc.on the hydraulic system performance is studied.Based on Matlab/Simulink software,the simulation model of the buffer device was established to analyze the displacement,velocity,acceleration,buffer chamber volume,pressure,leakage flow,energy,and temperature response characteristics of the master valve piston,and to study the influence of the hydraulic system return pressure,the diameter of the master valve buffer chamber,the height and length of the leakage gap on the buffer performance of the buffer device.The main factors affecting the buffer performance of the main control valve were found.The results of this study provide a basis and method for the design of the hydraulic system of the ultra-deepwater pile-driving hammer,the selection of key parameters and the simulation modeling work,and provide a theoretical basis for the development of the ultra-deepwater pile-driving hammer.