Optimal Design Of Hoisting System For Hydraulic Accumulator Workover Machine

The demand for hydraulic energy storage workover machines at home and abroad is increasing gradually,but most of the domestic production enterprises are still using traditional methods to design.It is necessary to use modern design methods to improve the design efficiency and quality.In this paper,the dynamic simulation,finite element analysis and optimization of the hoisting system of the hydraulic accumulator workover machine are carried out by using SolidWorks,ADAMS and ANSYS,which provides a way of thinking for the design of lifting system.The main contents are as follows:(1)Taking the lifting system of the hydraulic accumulator as the research object,the structure and working principle are introduced,and the 3D modeling and assembly of the crane,the main oil cylinder and the two layer platform in the hoisting system are carried out by using SolidWorks.In addition,according to the actual production situation,the working state of the lifting system is divided into two types of vertical and oblique conditions,and the force analysis is carried out in the two operating conditions.(2)the virtual prototype model of hoisting system was built by ADAMS,and the dynamic simulation of the lifting system's working process was realized.The key points in the hoisting system are defined,and the force function curves of the key points are obtained,which provides a reference for the structural design and optimization of the hoisting system.(3)The finite element statics analysis of the key components(crane and main oil cylinder)of hoisting system is carried out by using ANSYS.The stress and displacement charts of crane and main oil cylinder were obtained.The analysis shows that the maximum should be far less than the yield strength of the steel used,although it meets the safety requirements of the design but has the quality redundancy,resulting in the waste of materials.The main oil cylinder has larger displacement under inclined condition,which makes it a variable cross-section eccentric compression bar,and there is possibility of instability of the bar.In view of this situation,combined with the deformation energy method and the edge buckling criterion,the critical pressure of the main oil cylinder is approximately calculated.The risk of pressure bar instability is determined,which lays the foundation for subsequent optimization.(4)Modal analysis of overhead crane and main oil cylinder in ANSYS is carried out,and their first six natural frequencies and modes are obtained.The natural frequencies of overhead crane and main cylinder are all different from the natural frequencies of motors,which will not cause resonance.(5)the optimization objective is to minimize the quality of the truck and minimize the deformation and displacement of the main oil cylinder,and the Design Explorer module in ANSYS is used to optimize the sky car and the main oil cylinder.After optimizing the solution,the quality of the car is reduced by 11.43%and the maximum displacement of the main oil cylinder is reduced by 41.4%.