Design And Simulation Of Rodless Drilling Experimental Equipment

In recent years, with the fast economic development of China, Chinese government has invested a lot of money in infrastructure construction projects. During this period, rotary drilling rig industry in China has also been developing rapidly. As a new member of rotary drilling rigs, rodless drilling rig with its unique structure and superior performance has drawn lots of attention. Its creative structure overcomes the traditional bottlenecks in rotary drilling rig and hence the depth of drilling is no longer restricted. Rodless drilling rig appears very recently, hence there are still some issues to be solved. Currently no rodless drilling rig experiment platform is available to foreign and domestic scholars, which means such a platform is needed badly.This paper have finished the design work of the total‘s plans according to the design parameters: used the finite analysis method to analyze the structure; used kinematics and dynamics software to make simulation of the actuator according to the requirements of passable, accessibility and weighty.According to the working mechanism of rodless drilling rig, the structure of rodless drilling experimental sample rig is designed. The operation process of the rodless drilling experimental sample rig is analyzed in detail. A general design of hydraulic pipe reel, which can be splited, is proposed, and its feasibility and reliability is verified. The stability of the experimental prototype is analyzed.Finite element analysis is carried out on key components of the machine under different boundary conditions. The affects of these boundary conditions are analyzed, and hence a more reasonable boundary condition is presented. Modal analysis and harmonic response analysis are carried out on the mast of rodless drilling experimental sample. The different results of the modal analysis under different boundary conditions are compared, and the reasons for the differences are presented. Finally a more reasonable boundary condition is presented. The FEA’s results show that the experiment device’s stiffness and strength in all directions meet the requirements, and the mast systerm’s model results show that its natural frequency and dynamic characteristics meet the requirements.Virtual prototype simulation is carried out on the operation processes of changing amplitude of the mast, body rotation, hydraulic pipe roll, and then their operating characteristics are obtained. The feasibility of machine design is verified through analysis.