Modeling and Numerical Simulation of Anchor Electric Cylinders for Variable Working Conditions
Aiming at the current research status of the development and application of hydraulic anchor drilling equipment in un-derground coal mines,an electric cylinder suitable for anchor drilling rig was designed.The planetary roller screw was adopted as the motion mechanism,and the rigid-body dynamics model of the motion mechanism of the electric cylinder was established based on the Lagrangian method,taking into account the gravitational acceleration and the vertical jacking working condition.A simulation calculation model of the Lagrangian mathematical equations was established using Simulink,and the working characteristics of the electric cylinder under three working conditions were numerically simulated.The results show that there is a linear relationship between the screw torque and the output load,and the working efficiency is reduced under larger angular velocity or angular acceleration conditions.The torque is affected by the load and the power and efficiency are mainly affected by the angular acceleration under constant angular acceleration;the power and torque are mainly affected by the load under constant angular velocity,and the higher angular velocity can lead to lower effi-ciency.The correctness of the kinetic model is verified by analyzing the influencing factors of torque,power and efficiency in the three working conditions.
anchor drilling rigelectric cylinderrigid body dynamic modelnumerical simulation
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