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Double Shield Tunnel Boring Machine Auxiliary Thrust Cylinder

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A double shield tunnel boring machine (TBM) auxiliary thrust cylinder is a hydraulic cylinder that is used to push the gripper shield of the tunnel boring machine forward. The gripper shield is the front part of the tunnel boring machine that holds the cutterhead in place and braces the machine against the tunnel walls.

The auxiliary thrust cylinders are typically located on either side of the gripper shield. They are connected to the rear shield of the tunnel boring machine by means of a piston rod. When the auxiliary thrust cylinders are extended, they push the gripper shield forward, which in turn pushes the cutterhead forward.

The auxiliary thrust cylinders are used in conjunction with the main thrust cylinders of the tunnel boring machine. The main thrust cylinders are located at the rear of the tunnel boring machine and are used to push the entire machine forward. However, the main thrust cylinders cannot be used to push the gripper shield forward on its own, because the gripper shield is braced against the tunnel walls.

The auxiliary thrust cylinders are also used to retract the gripper shield. This is necessary when the tunnel boring machine needs to be moved back or when the tunnel needs to be widened.

Double shield tunnel boring machines are typically used in hard rock formations. In these conditions, the gripper shoes can be used to brace the machine against the tunnel walls and provide a stable platform for boring. The auxiliary thrust cylinders are used to push the gripper shield forward and to retract it as needed.

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Double Shield Tunnel Boring Machine Auxiliary Thrust Cylinder Specifications:

Product Name Double Shield Tunnel Boring Machine Auxiliary Thrust Cylinder
Features: Relying on the reaction force of the auxiliary push cylinder to push the tube piece to make the TBM move forward
Bore diameter: 220mm~320mm
Rod diameter: 180mm~240mm
Stroke: 2100mm~2600mm
Pressure: up to 35MPa
Special requirements up to 45MPa
Applications: Double Shield Tunnel Boring Machine

Advantages of Double Shield Tunnel Boring Machine Auxiliary Thrust Cylinder:

The use of a double shield tunnel boring machine (TBM) auxiliary thrust cylinder offers several advantages in tunneling operations. Here are some of the key advantages:

1. Increased thrust capacity: The auxiliary thrust cylinder enhances the overall thrusting capacity of the tunnel boring machine. This allows for greater force to be exerted on the cutterhead, enabling the machine to excavate through more challenging geological conditions, such as hard rock or mixed-face ground.

2. Improved stability: The auxiliary thrust cylinder helps to stabilize the tunnel boring machine during excavation. It provides additional support to counteract any lateral or vertical forces that may be encountered during the tunneling process. This ensures better control over the machine's movement and prevents undesirable deviations or deviations from the intended tunnel alignment.

3. Enhanced steering capability: The auxiliary thrust cylinder can be controlled independently, allowing for improved steering of the tunnel boring machine. By adjusting the thrust applied to each side of the cutterhead, the machine can be guided along the desired tunnel path with greater precision. This is particularly beneficial when navigating curves or complex alignments.

4. Reduced cutterhead wear: The increased thrust capacity provided by the auxiliary cylinder helps to minimize cutterhead wear. With higher thrust forces, the tunnel boring machine can cut through the rock more efficiently, reducing the amount of time the cutters are in contact with the rock face. This leads to less wear on the cutting tools, resulting in lower maintenance requirements and increased overall productivity.

5. Faster excavation rates: By increasing the thrusting capacity, the auxiliary thrust cylinder enables faster excavation rates. The tunnel boring machine can advance at a higher speed, reducing the overall project duration. This is especially advantageous in large-scale tunneling projects where time efficiency is crucial.

6. Improved safety: The stability and control offered by the auxiliary thrust cylinder contribute to enhanced safety in tunneling operations. The increased thrust capacity and improved steering capability help to prevent potential accidents, such as tunnel collapse or tunnel boring machine derailment. This ensures a safer working environment for the tunneling crew.

7. Versatility: Double shield tunnel boring machine auxiliary thrust cylinders are highly versatile and can be used in a wide range of geological conditions. They can handle varying rock strengths, geological formations, and groundwater conditions. This versatility allows for efficient tunneling operations across different projects and locations.

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Function of Double Shield Tunnel Boring Machine Auxiliary Thrust Cylinder:

The double shield tunnel boring machine (TBM) auxiliary thrust cylinder is a hydraulic cylinder that is used to push the gripper shield forward. The gripper shield is the frontmost part of the tunnel boring machine and it has gripper shoes that push against the tunnel walls to provide thrust. The auxiliary thrust cylinder is located in the gripper shield and it is connected to the main thrust cylinder.

When the main thrust cylinder pushes the cutterhead forward, the auxiliary thrust cylinder pushes the gripper shield forward. This ensures that the gripper shield remains in contact with the tunnel walls and that the tunnel boring machine can continue to bore forward.

The auxiliary thrust cylinder is also used to move the gripper shield away from the tunnel walls when it is time to install a new segment of the tunnel lining. The gripper shoes are retracted and the auxiliary thrust cylinder pushes the gripper shield back. This allows the tunnel workers to install the new segment of the tunnel lining.

The auxiliary thrust cylinder is a vital component of the double shield tunnel boring machine and it plays an important role in the tunneling process.

Here is a step-by-step explanation of how the double shield tunnel boring machine auxiliary thrust cylinder works:

  1. The main thrust cylinder pushes the cutterhead forward.
  2. The auxiliary thrust cylinder pushes the gripper shield forward.
  3. The gripper shoes push against the tunnel walls to provide thrust.
  4. The tunnel boring machine bores forward, cutting away at the rock or soil.
  5. When it is time to install a new segment of the tunnel lining, the gripper shoes are retracted.
  6. The auxiliary thrust cylinder pushes the gripper shield back.
  7. The tunnel workers installed the new segment of the tunnel lining.
  8. The gripper shoes are extended and the auxiliary thrust cylinder pushes the gripper shield forward.
  9. The tunnel boring machine continues to bore forward.

The double shield tunnel boring machine auxiliary thrust cylinder is a powerful and reliable component that is essential for the safe and efficient operation of double shield tunnel boring machines.

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Tunnel Boring Machine Hydraulic Cylinder Manufacturers

HZPT has been developing and producing tunnel boring machine cylinders since 2005, has successfully exported them all over the world, and has a leading global market share. For example, in the Bertha tunnel boring machine in Seattle, the entire set of high-pressure hydraulic cylinders is from HZPT. Even though the equipment was constructed underground for two years, HZPT's hydraulic cylinders did not suffer from corrosion and seal aging. We customized solutions for customers to fully meet the needs of complex working conditions such as high frequency, high load, vibration, and pollution during underground construction. HZPT uses its strength to build a comprehensive service brand for hydraulic transmission and control systems in the field of tunnel boring equipment.

In addition, we not only provide shield machine cylinders. We also supply a diverse range of hydraulic cylinders, including industrial vehicle hydraulic cylinders, aerial work vehicle cylinders, mobile machinery cylinders, industrial engineering cylinders, construction machinery cylinders, forklift hydraulic cylinders, agricultural machinery cylinders, crane hydraulic cylinders, sanitation machinery cylinders, excavator hydraulic cylinders, offshore hydraulic cylinders, energy technology cylinders, tunnel boring machine cylinders, and more. Our extensive product lineup caters to various industries and applications, providing solutions for your hydraulic needs.

We are one of the best hydraulic cylinders manufacturers. We have exported our products to clients around the world and earned a good reputation because of our superior product quality and after-sales service. We warmly welcome customers both at home and abroad to contact us to negotiate business, exchange information, and cooperate with us!

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