This gripper cylinder series is the core actuator of the gripper system on open-type tunnel boring machines (TBMs). Symmetrically mounted on the gripper arms alongside the main beam, they press the gripper shoes firmly against the tunnel walls, providing a stable reaction foundation for the thrust cylinders. Featuring an ultra-large bore (up to 1020 mm), ultra-high pressure design (rated 35 MPa), and individual clamping capacities reaching tens of thousands of kN, the cylinders adapt to ground conditions ranging from soft to hard rock. Even in jointed, mixed-face, and high-stress formations, they maintain extremely low clamping relaxation. Built with a massive anti-vibration structure, specialized sealing, and intelligent pressure monitoring, they ensure continuous, stable reaction force for efficient and accurate TBM advance.

This thrust cylinder series is the main propulsion element of open-type tunnel boring machines (TBMs). Symmetrically mounted along the main beam, they react against the gripper shoes braced firmly against the tunnel walls to drive the cutterhead forward into the rock face. Featuring an ultra-large bore (up to 620 mm), ultra-high pressure design (rated 35 MPa), and individual thrust capacities reaching thousands of tonnes, they can be zone-synchronized for steering correction and continuous curved boring. Purpose-built for the extreme conditions of hard rock tunneling — intense impact vibration, pervasive rock dust, and high geothermal temperatures — the series incorporates an anti-vibration structure, specialized high-pressure sealing, intelligent displacement sensing, and integrated counterbalance valves. It delivers continuous, stable operation over long-distance tunnels, ensuring precise penetration rate and tunnel axis control.

This torque cylinder series is the core force-transmission and attitude-control element for the cutterhead drive system of open-type tunnel boring machines (TBMs). Mounted between the main beam and the cutterhead drive unit in a diagonal or V-shaped configuration, the cylinders perform two critical functions: first, they smoothly transmit the massive instantaneous reaction torque — up to tens of thousands of kN·m — generated during hard rock cutting to the main frame; second, through differential extension in left/right or upper/lower groups, they precisely tilt the cutterhead angle, enabling fine steering and deviation correction. Designed with ultra-rigid, vibration-resistant structures, high-pressure accumulator seals, and integrated counterbalance valve packages, they maintain zero structural deformation and zero leakage under severe impact, high vibration, and rock-dust-laden face conditions, providing precise guidance and safe boring.

This shield cylinder series is designed for the front shield and finger shield of open-type tunnel boring machines (TBMs). It is a critical support element for stabilizing the cutterhead and preventing jamming caused by ground convergence. By actively gripping the tunnel wall or passively absorbing rock deformation, the cylinder provides rigid support and fine angular adjustment for the cutterhead, ensuring continuous boring without jamming in jointed, mixed-face, and high-stress hard rock formations. Built with a vibration-resistant structure, specialized sealing, and rock-dust protection, it delivers extremely high load capacity and fatigue life, operating reliably over long tunnels, deep overburdens, and high rock temperatures.

The thrust cylinder is the primary drive element of a shield machine’s propulsion system. Arranged in a circular array inside the tail shield, it pushes the entire machine forward by reacting against the assembled segmental lining ring. This series spans a complete range from compact to very large bore and ultra-long stroke, delivering over 8,300 kN of thrust per cylinder. With grouped zone control for steering and articulation, a super-rigid structure, specialized high-pressure sealing, integrated counterbalance valves, and displacement sensing interfaces, these cylinders provide stable, synchronized, zero-drift thrust in deep overburden, high water pressure, long-distance drives, intense vibration, and slurry environments — ensuring precise advance rate and tunnel axis control.

This articulated cylinder series is the core actuator for the articulation system of shield tunnel boring machines. Arranged circumferentially at the interface between the front and rear shield bodies, it performs a dual function: active steering and passive towing. In active mode, grouped differential cylinder extension tilts the front shield, enabling precise curve negotiation or cutterhead attitude adjustment (e.g., angular offset for tool changes). In passive mode, the cylinders extend synchronously with the thrust cylinders, smoothly pulling the tail shield forward while maintaining structural continuity between the shield sections. Covering a complete range from compact to very large bores, with high lateral load capacity, advanced grouped synchronous control interfaces, and reliable slurry protection sealing, the series ensures precise shield steering and structural safety under deep overburden pressure, continuous curves, and intense vibration.

This segment erector cylinder is the core actuator of the shield machine segment assembly system. It sequentially grasps, lifts, and precisely positions precast concrete segments within the tunnel to form complete lining rings. The cylinder features a unique two-stage telescopic design — the smaller inner piston rod remains fixed while the larger outer rod extends. The inner cylinder provides axial thrust and pull force, while the outer sleeve bears the substantial lateral forces and bending moments imposed by the segment weight, achieving an optimized “thrust/load-bearing separation.” Combined with high-rigidity guiding, multi-stage sealing, and an integrated counterbalance valve, it ensures smooth segment handling, precise positioning, and long-term reliability under frequent cycling, wet slurry conditions, and the confined tunnel environment.

This anti-torque cylinder series is a critical load-bearing component of the shield machine cutterhead drive system. Arranged circumferentially around the main bearing, it resists the massive instantaneous reaction torque generated during rock cutting, mixed-face excavation, and boulder impact, and transmits it steadily to the shield body. With an ultra-large bore, ultra-short stroke, and ultra-high pressure heavy-duty construction, combined with special high-pressure sealing and an integrated safety valve package, it ensures rigid, zero-displacement locking of the drive system under continuous alternating torque, severe vibration, and underground slurry conditions, safeguarding precise shield steering and equipment integrity.

This crusher cylinder is the core actuator in the crushing chamber of shield tunnel boring machines. It hydraulically opens and closes the crusher jaws (or toggle plate) to clamp and crush oversized cobbles, boulders, and rock fragments entrained in the excavated muck, reducing their size to prevent blockage of the slurry or discharge piping. Designed with a heavy-duty rigid structure, task-specific sealing, and comprehensive anti-corrosion treatment, it consistently delivers stable, leak‑free clamping force in the typical shield environment — high-pressure slurry, intense vibration, heavy abrasion, and confined space.

This gripper cylinder series is the core actuator of the gripper system on double shield TBMs. Symmetrically mounted on the gripper arms alongside the gripper shield, they press the gripper shoes firmly against the tunnel walls, providing a stable reaction foundation for the main thrust cylinders. In competent hard rock, the gripper system serves as the ultimate reaction base for the entire machine's thrust — its clamping reliability directly determines penetration efficiency and alignment accuracy. Featuring ultra-high thrust (clamping force reaching tens of thousands of kN) and an ultra-high pressure design (rated 35 MPa), the cylinders adapt to ground conditions ranging from soft to extremely hard rock. Even in jointed, high-stress, and mixed-face formations, they maintain extremely low clamping relaxation. Built with a massive anti-vibration structure, specialized sealing, and intelligent pressure monitoring, they provide enduring, stable reaction force for long-distance tunnel construction.

This main thrust cylinder series is the core propulsion element of the main drive system on double shield TBMs. Symmetrically arranged between the gripper shield and the main thrust frame, they react against the tunnel walls via the gripper system to push the cutterhead and front shield forward into the rock face. In competent hard rock conditions, the main thrust cylinders are the primary source of advance force, delivering continuous, stable thrust. Featuring high thrust and moderate stroke, they can be zone-synchronized for shield attitude correction and continuous curved boring. Purpose-built for the extreme conditions of hard rock tunneling — intense impact vibration and pervasive rock dust — the series incorporates a high-rigidity anti-vibration structure, specialized high-pressure sealing, integrated counterbalance valves, and intelligent displacement sensing interfaces. It delivers continuous, stable operation over long-distance tunnels, ensuring precise penetration rate and tunnel axis control.

This auxiliary thrust cylinder series is the core drive element of the auxiliary propulsion system on double shield TBMs. Arranged in a circular array inside the tail shield, they react against the previously erected segmental lining ring to push the machine forward under specific conditions — such as when the main gripper is retracted, or the ground is too weak to provide adequate reaction force. The cylinders feature high thrust and ultra-long stroke (up to 2800 mm), and can work in coordination with, or independently from, the main thrust cylinders via zoned control. This enables continuous, safe advance through soft ground, faulted zones, and mixed-face conditions. With a high-rigidity structure, specialized high-pressure sealing, and integrated safety valve packages, they withstand sustained high-frequency heavy loads, intense vibration, and slurry exposure, ensuring stable, efficient tunneling operations.