Design And Optimize Of Lengthened Hydraulic Excavator Device Based On The Virtual Prototype

Hydraulic excavators is a typical representative of engineering machinery,which played a pivotal role in economic construction and development in our country.As the main actuator of the basic movements of the hydraulic excavator, hydraulicexcavator, in the dual promotion of the market and technology, in order to meet theneeds of different specific operating environment,the development of structure designtend to diversity. To meet the needs that clean-up ditches, water conservancyconstruction, digging slopes, underground work-in-progress, removal of high-risebuildings and other specific construction, especially to meet the needs of long-termplanning of the water conservancy construction promoted by the Ministry of WaterResources, it has important practical significance to study and design hydraulicexcavators lengthened device which can operate in a wider range and long-distanceoperations.The Lengthened hydraulic excavators device which designed and improvedbased on the15tons standard hydraulic excavator working device. Before research onthe lengthened hydraulic excavator working device, first analysis and research the15tons standard hydraulic excavator working device,providing a reference to the designof lengthened working device. The main research work are as follows:(1) Kinematics modeling and simulating of15tons standard device, and verifythe accuracy of the kinematics simulation model and the simulation results byverification test.(2) Improved design the standard device kinematics by use of theoreticalknowledge and based on the kinematics modeling and simulation of standard workingdevice methods, kinematics simulate the lengthened working device and interferencecheck under all conditions, to obtain the best design of lengthened device which meetthe requirements of design.(3) Obtain the posture under the most dangerous working conditions throughdynamics simulating of standard working device.Comparison with the theoreticallymost dangerous posture,analysis the correctness of this most dangerous attitude.Verifythe accuracy of the dynamic simulation model and simulation results by designingfreedom Mining experimental. The force carried on hinge point under most dangerousattitude serve as load conditions, ANSYS analysis of standard boom and stick, obtainstress concentration area and the maximum force point of the boom and arm. (4) Kinematics simulation of lengthened working device based on the method of15tons standard dynamics modeling and simulation to get the most dangerous workposture and the force carried on the hinge point. The force carried on the hinge pointposture serve as load conditions, by ANSYS analysis to obtain the stress-strain BoomStick cloud image, analysis the stressed deformation whether can meets therequirements of the material stiffness strength. Comparing with standard operatingdevice and analysis the variation of the force carried on it.(5) Parametric model of Lengthened operating device by the establishment of thedesign point and the design variables in ADAMS, optimization design of the structureon the basis of bucket linkage force transmission ratio.