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Shield Machine Thrust Cylinder for Tunnel Boring

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Hydraulic Cylinders

A shield machine thrust cylinder is a hydraulic cylinder that is used to push a shield machine forward during tunneling operations. Shield machines are specialized machines that are used to excavate tunnels through a variety of ground conditions, including soil, rock, and sand. They are typically used to construct tunnels for transportation, utilities, and water and wastewater infrastructure.

Shield machines typically have multiple thrust cylinders that are evenly spaced around the circumference of the machine. The thrust cylinders are connected to a hydraulic system that provides the power to push the machine forward. As the thrust cylinders extend, they push against the ground ahead of the shield machine, causing it to move forward.

The size and power of the thrust cylinders on a shield machine will vary depending on the size and type of tunnel being constructed. For example, a shield machine that is used to excavate a large-diameter tunnel through hard rock will require more powerful thrust cylinders than a shield machine that is used to excavate a small-diameter tunnel through soft soil.

Shield machine thrust cylinders are typically made of high-strength steel and are designed to withstand the harsh conditions of underground tunneling. They are also equipped with a variety of safety features to prevent failures and protect the operators.

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Key Features of Shield Machine Thrust Cylinders:

Here are some of the key features and benefits of shield machine thrust cylinders:

1. High strength and durability: Shield machine thrust cylinders are made of high-strength steel and are designed to withstand the harsh conditions of underground tunneling.

2. Precise control: Shield machine thrust cylinders are equipped with precise control systems that allow the operator to accurately control the speed and force of the thrust.

3. Safety features: Shield machine thrust cylinders are equipped with a variety of safety features to prevent failures and protect the operators.

4. Reliability: Shield machine thrust cylinders are designed to be reliable and low-maintenance, even in the most demanding operating conditions.

Shield machine thrust cylinders are essential components of shield machines and play a vital role in the construction of tunnels around the world.

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Shield Machine Thrust Cylinder Specifications:

Product Name Shield Machine Thrust Cylinder
Features: Move the shield machine forward
Bore diameter: 140mm~550mm
Rod diameter: 120mm~420mm
Stroke: 900mm~4100mm
Pressure: up to 35Mpa
Special requirements can reach up to 45Mpa
Applications: Shield Machine, Tunnel Boring Machinery

Advantages of Shield Machine Thrust Cylinder:

Shield machine thrust cylinders play a vital role in tunnel boring operations. They provide the power and thrust necessary to propel the machine forward through the ground.

Here are some of the advantages of shield machine thrust cylinders:

  • High power and thrust: Shield machine thrust cylinders are capable of generating very high levels of power and thrust. This is essential for boring through hard rock and other challenging ground conditions.
  • Precise control: Shield machine thrust cylinders can be precisely controlled to ensure that the machine advances at a steady and uniform rate. This is important for maintaining the integrity of the tunnel lining and avoiding damage to the machine itself.
  • Reliability: Shield machine thrust cylinders are designed to be extremely reliable and durable. They must be able to withstand the harsh conditions of underground tunneling operations.
  • Safety: Shield machine thrust cylinders are equipped with safety features to prevent accidents and injuries. For example, they may have pressure relief valves and overload protection systems.

In addition to these general advantages, shield machine thrust cylinders also offer a number of specific benefits for different types of tunnel boring machines. For example, in double-shield tunnel boring machines, thrust cylinders can be used to transfer the thrust from the gripper shield to the tunnel lining. This allows the machine to advance forward even in unstable ground conditions.

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Shield Machine Thrust Cylinder Working Principle:

A shield machine thrust cylinder is a hydraulic cylinder that is used to propel a shield machine forward while it is excavating a tunnel. The cylinder is typically located at the rear of the shield machine and is attached to the main support structure.

To operate, the thrust cylinder is pressurized with hydraulic fluid. This causes the piston rod to extend, which in turn pushes the shield machine forward. The amount of thrust that the hydraulic cylinder can generate is determined by the size of the piston and the pressure of the hydraulic fluid.

Shield machine thrust cylinders are typically double-acting, meaning that they can be used to push the shield machine forward or backward. This is useful for maneuvering the shield machine around obstacles or for adjusting its position in the tunnel.

Here is a more detailed explanation of how a shield machine thrust cylinder works:

  1. The thrust cylinder is attached to the main support structure of the shield machine.
  2. The hydraulic fluid is pumped into the cylinder, pressurizing the interior of the cylinder.
  3. The pressure of the hydraulic fluid causes the piston rod to extend.
  4. The piston rod is attached to the shield machine, so as the piston rod extends, it pushes the shield machine forward.
  5. The shield machine moves forward, excavating the tunnel as it goes.

Once the shield machine has advanced a certain distance, the thrust cylinder is retracted and the process is repeated. This cycle continues until the tunnel is complete.

Shield machine thrust cylinders are critical components of shield machines and play a vital role in the tunneling process. They are designed to withstand high pressures and forces, and they must be able to operate reliably in challenging environments.

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China Shield Machine Cylinder Manufacturers

HZPT has been developing and producing shield machine cylinders since 2005, has successfully exported them all over the world, and has a leading global market share. For example, the Bertha shield 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 cylinders did not suffer from corrosion and seal aging.

In recent years, HZPT has developed more energy-saving and efficient hydraulic systems for shield machines in accordance with customer requirements and the characteristics of the domestic shield market application. In the multiple systems of the shield machine, we are equipped with the V30D series on the Inline brand with low noise and more reliability. V30D-140 pump is used in the thrust hydraulic system;  V33D-250 closed pump is used in the rotary hydraulic system of the screw machine; V30D-140+45 pump is used in the assembly machine and auxiliary hydraulic system; V30D-115 pump is used in the synchronous grouting hydraulic system.

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.

Moreover, we go beyond 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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