基于压差控制的泥水平衡式盾构机主驱动密封气动自动保压系统研究及应用

泥水平衡式盾构机主驱动四道唇形密封组合承压能力一般不超过0.6 MPa,无法满足设备在大于0.6 MPa的高水压工况下的安全施工需求.据此,设计了基于压差控制的泥水平衡式盾构机主驱动密封气动自动保压系统.该系统可将现有唇形密封承压能力提高至0.8 MPa,并可自动实现加压、泄压,无需人为参与,降低工人劳动强度.对该系统...

Research and Application on the Pneumatic Automatic Pressure Maintaining System of the Main Drive Seal of Slurry Balance Shield Machine Based on the Pressure Difference Control

The combined pressure bearing capacity of the four lip seals by the slurry balanced shield machine main drive is generally less than 0.6 MPa, which can't meet the safety construction requirements of the equipment under the high water pressure condition of more than 0.6 MPa. In order to solve this problem, the main driving seal pneumatic automatic pressure maintaining system of slurry balance shield machine based on pressure difference control is designed. This system can increase the pressure bearing capacity of the existing lip seal to 0.8 MPa, and can automatically realize pressure and pressure relief without human participation, reducing the labor intensity of workers. The simulation analysis and experimental verification of the system show that the design of the system is reasonable, the control accuracy is high, and the system is safe and reliable, which can meet the sealing requirements of the main drive of the slurry shield machine under the condition of 0.8 MPa high water pressure.