Hydraulic Driving System Study Of Earch Pressure Balance Pipe Jacking Machine

As the essential part of Trenchless Technology, Earth Pressure Balance Pipe Jacking Machine is a kind of technical equipment integrated with various techniques specialized for the pavement of underground pipeline engineering which characterized by its advantageous performances such as the wide range of workable soil, the stability of function, environment friendly and slight surface deformation. Of late years, with the acceleration of the urbanization, Earth Pressure Balance Pipe Jacking Machine is widely applied while is constrained by its total level of designing and manufacturing. Therefore, to make a study of related design theory and design methods of driving system can be helpful for the design and manufacture of Trenchless Equipment of our country.This paper firstly analyses the development and research status of push bench industry home and abroad, and then focuses on the driving way of Earth Pressure Balance Pipe Jacking Machine and the development direction of driving system, points out that the hydraulic driving characterized by small installation size, low cost and the adaptability of poor working condition is more suitable for the driving way of E Earth Pressure Balance Pipe Jacking Machine. Besides, this paper takes the Earth Pressure Balance Pipe Jacking Machine (?)2200mm in diameter, and adopts methods such as theoretical analysis, parameter calculation and analog simulation, designs and simulates its hydraulic driving system while the result indicates that its function meets the practical application.The hydraulic driving system designed in this paper can be divided into three systems:Cutter Head Driving System adopted variable displacement pump-variable displacement motor closed volume control circuit; Rectification Driving system layout as "#"-shape; and Soil Transmission Driving System adopted variable displacement pump-fixed displacement motor open volume control circuit, using energy accumulator to occlude urgently the gate of come up. Mathematic models of these systems, the AEMsim simulation model and MATLAB control model of Cutter Head Driving System are built by theoretical analysis and parameter calculation. The simulation result suggests that Cutter Head Driving System has stable speed so that it can stabilize to the level of rated rotation rate in0.5s in the condition of upheaval load; indicates that Rectification Driving system can work normally in the soil in which the loading stiffness is1e-7N/m or below; manifests that Soil Transmission Driving System can stabilize to the level of rated rotation rate in the varied load and adjust in1s so that the energy accumulator can close the gate of come up in1s in emergency when implement multi-task. To conclusion, the hydraulic driving system designed in this paper can satisfy the practical project and the related design theory and methods provide the reference for the design of hydraulic driving system of Earth Pressure Balance Pipe Jacking Machine.