Kinematic Simulation And Optimization Design For Hydraulic Excavator Working Device

Hydraulic excavator is an important variety of engineering machinery and the mainmechanical equipment excavated soil. At present, in our country a lot of excavating machineryneed to be used in building industry, railway and highway, farmland and water conservancy, themining industry, military and so on which can reduce the labor intensity of workers, speed up theproject construction; at the same time it has been stimulated the growth of excavator marketwhich is increased by15%~30%every year and the sales of all kinds of excavator machinery ismore than170000in2011. However, in the engineering practice the products of domesticmanufacturers appeared the questions of welding crack, pin shaft fracture and unreasonablestructure design leaded to interference, which is seriously affected the market competitiveness ofthe products.Hydraulic excavator working device is the construction tool which is directly used tomining operations and an important part which can achieve the various function; Backhoeworking device is a kind of main hydraulic excavator working device and whether the structuredesign is reasonable, it will directly affect the working performance of the hydraulic excavator.In this paper it used a type of backhoe working device of hydraulic excavator as the researchobject and carried out the research of modeling, simulation finite element analysis andoptimization design with the method of virtual prototype technology and finite element analysis.The main research work includes the following aspects:⑴Analyzed the compositionand working principle of hydraulic excavator and establishedthree-dimensional model of the hydraulic excavator working device using the software ofSolidworks.⑵Established the virtual prototype model of work device through importing the3d modelto ADAMS and carried out the kinematics simulation and dynamics simulation which wasverified the rationality of the mechanism design and could obtained the chart of motion envelopeand the change curves of each hinge point force.⑶Combining the change curves of each hinge point force, carried out the static strengthanalysis for the movable arm with the software of Hypermesh and ANSYS and obtained thedistribution situation and regular of stress and displacement about the typical conditions.⑷Established the parametric finite element model of movable arm and carried out thestructure optimization analysis for the movable arm by using the optimization module structureof ANSYS optimization analysis which was achieved the goal of weight loss.In this article it uses the software of Solidworks, ADAMS, Hypermesh and ANSYS andrealized the whole process from modeling to kinematic analysis, dynamic analysis, structuralstrength analysis and structure optimization; the research results will provide certain referencebasis to the design and analysis of hydraulic excavator working device.