Development Of Wheel Hydraulic Auxiliary Driven System Of Traction Shield Carrier

The rapid development of coal mining technology puts forward higher requirements for the operation safety and efficiency of large-scale comprehensive mining equipment.The shield carrier is widely used in the moving and reversing work of the large-scale coal mine comprehensive mining face.There are more and more steep roadways in coal mine areas in China,and the slope of roads in some mining areas in North China is more than 8%.Some of the domestic traction shield carriers used in the mining area will have the problem of insufficient adhesion when encountering large slope.This paper studies the wheel hydraulic auxiliary driven system of the traction shield carrier to solve the problem of insufficient adhesion,the researches are as follows:(1)Based on the analysis of the research status and development trend of the shield carrier and wheel hydraulic driven technology at home and abroad,the structure,working principle and working condition of the traction shield carrier are analyzed,and the maximum climbing degree of the shield carrier determined by the driving torque of the diesel engine and the adhesion of the ground is compared.It is concluded that the small adhesion weight of the original shield carrier is the reason of the small maximum climbing gradient,and it is proposed to increase the wheel hydraulic driven system can improve the attached weight of the shield carrier,and then increase the maximum climbing gradient.(2)The characteristics of the open circuit and closed circuit of the hydraulic pump motor are compared and analyzed,and the single pump and multi motor closed hydraulic circuit is selected as the auxiliary driving system of the traction shield carrier.(3)According to the requirements of the speed and power parameters of the traction shield carrier,the parameters of the traveling hydraulic system are matched.The matching method is studied,the selection and parameter calculation of the hydraulic motor and pump are completed,and the checking calculation is carried out.(4)Based on AMESim simulation software,the simulation model of thehydraulic auxiliary driven system for the wheel hydraulic auxiliary driven system of traction shield carrier is established,and the driving performance and starting performance of the shield carrier are simulated and verified for the flat road and ramp conditions.The results of calculation and simulation show that the designed wheel hydraulic drive system can meet the requirement of 10% of the climbing slope of the traction shield carrier.