| With the continuous innovation of drilling and production technology and increasing drilling requirements,high-power,large-displacement high-pressure pumps have become the development requirements of drilling equipment in the future.Therefore,the research on high-pressure drilling pumps not only has scientific research value,but also can meet the needs of engineering practice.The virtual simulation technology that has gradually emerged in recent years has become one of the important technical means for the development of new products for drilling pumps.In this paper,the new 3500 HP drilling pump is taken as the main research object.Through theoretical analysis and numerical simulation,innovative modular structure design,virtual simulation and structural finite element analysis of the main components of the drilling pump are performed.The central node combined sampling method is used to optimize the structure,and the corresponding conclusions are obtained.It provides a theoretical research reference for the development of new high-power drilling pumps that meet the modern drilling technology.The main research contents are as follows:(1)In order to avoid the design and process defects in the traditional structure,the innovative design of the power-end component structure is carried out,and the innovative structural modeling is performed using Solidworks software.Based on the calculation theory,the dynamic characteristics analysis and load analysis of the dynamic end are performed to verify the reasons for the theoretical peaks of the structural forces and the periodic changes in the force curves,and provide a reference basis for subsequent numerical simulation.(2)Using virtual simulation technology and ADAMS software to establish the dynamic model of the power end system of the 3500 HP drilling pump,the dynamic response of the power end of the drilling pump is studied from the aspects of liquid pressure,input torque,force characteristics and speed.Conclusions similar to the theoretical analysis were obtained,which verified the accuracy and reliability of the simulation results.(3)Use AMESim software to establish and simulate the hydraulic dynamic model system of the 3500 HP drilling pump,study the time-varying characteristics of structural forces and displacement changes,the time-varying characteristics of suctionand discharge pump valve displacements,speed and flow changes,and drilling pumps The change of the flow and pump pressure of the whole machine,the simulation results are obtained,the time-varying causes are analyzed,and the theoretical calculation parameters are compared to confirm the accuracy of the structural design.(4)Finite element analysis is performed on the components at the power end of the drilling pump to determine the position of the most dangerous point of the structure and check the structural static strength.Based on the theory of modal analysis,the first ten natural frequencies and mode shapes of the crankshaft structure are extracted,compared with the vibration frequency of the excitation source,the potential resonance frequency is analyzed,and further structural optimization directions and goals are proposed.(5)Based on the response surface fitting theory,combined with the central node combination design sampling method,using the turning radius,turning pin hole radius,main shaft diameter and mandrel radius as input parameters,obtaining design point data and performing sensitivity analysis and response surface setting The area with sharp and stable changes on the response surface is obtained and the fitted surface is analyzed,so as to effectively estimate the model parameters,determine the structural optimization scheme,and optimize the crankshaft structure reasonably. |
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