patent references
Overview of TBM
Construction method
efficency comparison
engineering patent references
A patented article(Patent Product)
Inside roller cutter, internal pressure could increase due to frictions among oil gas, Bearing, and seal set and far worse, it could get out of work by partial frictional wears of Disc Ring. The present product attaches super bellows to a shaft to maintain a table pressure and a detailed chart supper bellows work on any torques change to be used by an increased internal pressure to maintain steady and balanced level between an initial torque and ordinary torque.