Jiaheng hydraulic cylinder, with ultra-high pressure bearing capacity, sub millimeter level synchronous control, and long-life design, has become a core supplier for enterprises such as China Railway Construction and China Communications Construction, helping large tunnel projects break through the bottleneck of complex geological excavation

Application of Jiaheng hydraulic cylinder in shield tunneling machine

1. Propulsion system oil cylinder

Function: Drive the shield machine to advance as a whole and resist geological resistance.

Requirements for hydraulic cylinders: high synchronization accuracy for multiple cylinders; Need to adapt to sudden changes in complex geological loads such as soft soil and rock layers.

2. Knife disk drive system

Function: Provides torque for the rotation of the cutterhead.

Hydraulic cylinder requirements: Drive the clutch or brake to achieve disc start stop/speed regulation.

3. Hydraulic system of pipe segment assembly machine

Function: Accurately grasp, move, and assemble concrete pipe segments.

Hydraulic cylinder requirements: Six degree of freedom attitude adjustment cylinder group; Vacuum suction cup locks the oil cylinder.

4. Shield tail sealing grease injection system - high-pressure metering cylinder

Function: Inject sealing grease under high pressure to prevent groundwater from entering the tunnel.

5. Articulation system oil cylinder

Function: Adjust the relative angle between the shield body and the tail of the shield machine to achieve curved excavation.

Hydraulic cylinder requirements: dynamic compensation of tunnel axis deviation is required; Endure lateral soil pressure imbalance force.

Advantages and Characteristics of Jiaheng Hydraulic Cylinder

1. The cylinder body is made of 316L stainless steel and uses acid and alkali resistant fluororubber seals, which can effectively resist underground chemical corrosion

2. The oil cylinder can be equipped with copper alloy heat dissipation fins and external circulation cooling interfaces, which can effectively control temperature and increase working hours for continuous excavation.