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Design of Energy Recovery Strategy and Simulation Analysis of Rotary Drill Hydraulic Braking System

QI Jiulong;ZHANG Zhizhuang;ZHAO Jingyi;WANG Zhiyong;CHANG Ronglei;Qinhuangdao Tianye Tolian Heavy Industry Co.,Ltd.;Research Institute of Fluid Transmission and Control,The Ministry of Education Key Laboratory of Advanced Forging Forming Technology and Science,Yanshan University;  
Hydraulic braking is used on rotary drill,to avoid the impact on the pump caused by the system pressure fluctuations is necessary,and the kinetic or potential energy can be recycled for use of the rotary drill when braking. Through the calculation and simulation analysis of the hydraulic braking system,the pressure relief valve of parameters of the closed pump was adjusted,and the system pressure impact was reduced. Energy recovery strategy of the braking system was proposed,and the mathematical model was established and the energy recovery system was simulation analyzed. The relationship of the pressure increasing of the accumulator gas chamber along with time was obtained,and the relationship between the size of the throttle opening and the braking time was revealed.The efficiency of energy recovery braking system was calculated. The correctness of the using of hydraulic braking system on rotary drill and the feasibility of energy recovery strategy are verified. Energy recovery is implemented which tranforms the kinetic or potential energy of the rotary drill to pressure energy of the accumulator,and a reference for energy recovery braking system on large vehicle is provided.
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