| With the depletion of land-based oil and gas resources,the development of oil and gas resources has turned to the marine sector.In the course of the development of offshore oil and gas resources,a strong research and development capability for marine drilling equipment is needed.e mud pump is the "heart" of the drilling rig and is also one of the important equipments in offshore oil drilling equipment.At present,deepwater drilling operations at sea require that mud pumps have the characteristics of large power,high pressure,light weight,and compact structure.At the same time,most domestic existing mud pumps have the disadvantages of large volume and excessive structural design margin.erefore,on the premise of ensuring product reliability,in order to reduce product energy consumption and improve product competitiveness,it is of great significance to carry out lightweight design research of slurry pump structure.is project was commissioned by the company to use the P2200 high-pressure mud pump powered by domestically-made materials as its object,and studied the lightweight design of its structure,mainly completing the following tasks:First,based on the company’s existing equipment technical drawings,considering the degree of matching with the ANSYS Workbench optimization platform interface,Solid Works software was selected to establish a three-dimensional parametric model of the equipment components;in order to ensure the optimization of the optimization parameters in the platform,Solid Works software sets key parameters for components and prepares for the optimization of subsequent component parameters.Secondly,in order to understand whether the pump operation law and structural static strength meet the requirements,the kinematics and statics analysis has been completed by the comprehensive analysis of the main components of the slurry pump’s power end using theoretical mechanics;in order to determine the structural stress distribution,the load is analyzed according to the static force.e finite element analysis was performed on the key components of the power end pump and the crankshaft.e limit conditions of the pump body and crankshaft were obtained based on this data,which provided the basis for the boundary condition setting and load application in the subsequent structural optimization design;e response of the external stimulus,based on the modal analysis of the finite element,studies the deformation of the structure under different modes,and proposes the dynamic analysis suggestions for the subsequent optimization.is also provides the determination of the boundary conditions in the subsequent structural optimization.e basis.Finally,based on the conclusions of statics,finite element analysis and modal analysis,in order to further determine the optimization direction of the structure,a topological analysis was performed before optimization of the parameters of the pump body and the crankshaft,which clearly pointed out the direction for subsequent optimization.For the parametric model,combined with the finite element method,comprehensive application of response surface method technology,improved genetic algorithm,central test method and other commonly used methods in the modern optimization design,optimization of structural parameters,has obtained a number of groups of lightweight proposals;e final optimization plan was determined.Based on the same optimization platform(ANSYS Workbench),the optimized component performance was compared with the original design.In the selection of the pump solution,the idea of controlling the deformation of crankshaft and pinion shaft bearing seat was proposed.is determines the viable final optimization plan.On the premise of guaranteeing product performance,the weight reduction is about 5.2%,which effectively reduces the energy consumption of the product.The method based on optimization theory such as finite element and response surface has reference significance for structural optimization design of similar products. |
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