Study On The Mine Face-Shovel Hydraulic Excavator Working Device Based On The Virtual Prototype Technology

In recent years, the high-speed development of China's economy attracts worldwide attention, and the prevailing of mine construction that the enormous energy demand initiates among economic development has caused the mine equipment specially is the large-scale face-shovel hydraulic excavator swift and violent development. However, only several domestic companies have ability to produce 65 ton above mine face-shovel hydraulic excavator. Therefore, the research and the development on large mine hydraulic excavator appears very important.The tradition design method of the face-shovel hydraulic excavator work is tedious and it also needs to use the physical prototype to appraise the comprehensive performance of the complete machine, so the long production cycle and high cost are caused. With the virtual prototype technology, the simulation experiment can be done before the product is manufactured. Therefore, the design cycle and the costs can be reduced. Base on the original design project which is provided by a Chinese exactor company, this paper has studied on the face-shovel hydraulic excavator working device with the virtual prototype technology, finished the kinematics and dynamics analysis on the working device, and compared the simulation date with the test data in order to verify the correctness of the simulation. Finally, the load spectrum document of every component's revolute joints can be obtained, so that it can be laid the foundation for the following fatigue analysis. The specific contents of this study are as follow:①The organization characteristic and the law of motion of the face-shovel hydraulic excavator working device has been studied , and the relationship between the length of three group cylinders and three angle values which attribute excavator posture has been inferred.②3 d solid model of the face-shovel hydraulic excavator components have been established based on the 3 d modeling software Pro/Engineer, and the corresponding constraint condition has been appended, so the complete machine assembly has been completed. Then the excavator complete machine model can be exported into ADAMS using the mech/pro2005 connection software, and the virtual prototype model of the excavator can be established.③The kinematics simulation of the whole machine operation range as well as the horizontal and linear digging condition of the face-shovel excavator working device has been completed. Then the main operating dimensions and excavating trajectory envelop diagram of the excavator can be obtained, so the design proposal feasibility has been verified.④With the scene test excavation resistance value to some 70t main face-shovel hydraulic excavator which takes load to the simulation, the dynamics simulation of the face-shovel hydraulic excavator has been completed.⑤The simulation date has been compared with the test data in order to verify the correctness of the simulation. According to the result of the dynamics analysis, the load–time-history of every revolute joint can be obtained, so it can provide credible spectrum load for the following fatigue analysis of excavator components. And the effective reference has been provided for the face-shovel hydraulic excavator physics prototype manufacture and the new type design proposal appraisal.