Research On Dynamic And Energy Consumption Of Working Equipment Of Large Face Shovel Hydraulic Excavator

In recent years,with the development of the national economy and infrastructure needs,as well as the current state advocated "along the way",making growing the demand for hydraulic excavator,stimulated the production of hydraulic excavators Manufacturing development.However,the development of hydraulic excavators in China is limited by the technical barriers of the western countries.There are still many problems in terms of technical level,production technology,product yield and quality,reliability and so on.In particular,China's large-scale shovel hydraulic excavator has made great progress,but to compete with the Western powers for the market,still need to pay more hard work.The quality of the working equipment of the large face mining shovel hydraulic excavator is generally large and will produce considerable inertial force during the descending of the boom.If the energy can be recovered,the energy saving of the excavator will be to a very important role.At the same time,due to the large quality of the working equipment,the uneven speed change of the bucket movement speed and the change of the material resistance during the operation will cause great impact vibration to the main engine and the hydraulic system,resulting in the fatigue damage of the working device.Therefore,it is necessary to study how to recover the energy generated during the descent of the working equipment in order to achieve the purpose of energy saving.In addition,it explores the relationship between the flow characteristics of the working hydraulic cylinder and the bucket tip speed.Reduce the uneven operation of the bucket due to the impact of the machine vibration,improve the reliability of the excavator.In this paper,a large face positive shovel hydraulic excavator with auxiliary hydraulic cylinder is used as the research object.The kinematic inverse solution of the working equipment is calculated by means of the motion analysis method of MATLAB linkage mechanism.The bucket And the velocity and flow characteristics of each working hydraulic cylinder in the uniform motion are analyzed.The kinematics and dynamic simulation of the three-dimens ional model are carried out in Adams software with the speed of the hydraulic cylinder as the control signal.The lever crowding effect is verified and the thickness is Calculated,The force and energy consumption of the working hydraulic cylinder are determined by adding the load force to the bucket tip,and the energy potential and the energy consumed by the load are calculated.The results show that the running speed of the bucket tip is relatively stable,which can reduce the vibration damage caused by the uneven operation sp eed of the bucket in the horizontal pressing condition.The energy output from the working cylinder plus the sum of the potential energy potential of the working device And the energy consumption of the load is basically the same,both the use of the work of the gravity potential of the equipment,while not causing a waste of energy.The results of this study can provide a theoretical reference for the large horizontal shovel hydraulic excavator to achieve uniform level of crowding and recovery of the work unit gravity potential energy.