Long-stroke hydraulic cylinders for shipyard dry docks

Long-stroke hydraulic cylinders for shipyard dry docks


Long-stroke hydraulic cylinders play a crucial role in shipyard dry docks. These specialized cylinders are designed to provide the necessary force and stability to lift and support massive vessels during maintenance and repair operations. In this article, we will explore the various aspects of long-stroke hydraulic cylinders, including their construction, working principles, and applications.

1. Understanding long-stroke hydraulic cylinders

Long-stroke hydraulic cylinders are hydraulic actuators that feature an extended stroke length compared to standard cylinders. They are typically used in shipyard dry docks where the need for a longer stroke is essential to accommodate the large size of ships. These cylinders are designed to withstand high loads and provide reliable and precise movement for lifting and positioning operations.

2. Construction of long-stroke hydraulic cylinders

Long-stroke hydraulic cylinders are constructed using high-quality materials to ensure durability and performance. The cylinder barrel is made from robust steel, while the piston rod is usually hard chrome-plated to resist corrosion and wear. The internal components, such as seals and bearings, are carefully selected to withstand high pressures and harsh operating conditions. Additionally, these cylinders are equipped with advanced features like cushioning and position sensing for enhanced control and safety.

3. Working principles of long-stroke hydraulic cylinders

Long-stroke hydraulic cylinders operate based on the principles of hydraulic fluid pressure. When hydraulic fluid is pumped into the cylinder, it exerts pressure on the piston, causing it to move. This movement is then transferred to the connected load, such as a ship, allowing for lifting or lowering operations. The stroke length of these cylinders is designed to accommodate the height requirements of shipyard dry docks, ensuring smooth and efficient maneuverability.

4. Applications of long-stroke hydraulic cylinders

Long-stroke hydraulic cylinders find extensive applications in shipyard dry docks. They are used for various tasks, including:

  • Ship lifting and lowering
  • Supporting vessels during maintenance and repairs
  • Positioning and aligning ships for welding and painting
  • Transferring heavy loads within the dry dock facility

5. Company promotion and introduction

Our company is a leading player in the hydraulic cylinder market in China. We specialize in manufacturing a wide range of hydraulic cylinders, including long-stroke cylinders for shipyard dry docks. With a design capacity of 200,000 sets and 300 sets of fully automated CNC production equipment, we ensure the highest quality standards and efficient production processes.

We take pride in offering premium products at competitive prices, backed by excellent customer service. In addition to long-stroke hydraulic cylinders, we also supply a variety of other hydraulic cylinders, such as industrial vehicle cylinders, rotary drilling rig cylinders, and hydraulic cylinders for construction machinery and mining dump trucks. Customers are welcome to customize their orders based on their specific requirements.


Q: Can long-stroke hydraulic cylinders be used in other industries apart from shipyard dry docks?

A: Yes, long-stroke hydraulic cylinders have applications in various industries where the need for extended stroke length is crucial. These cylinders are commonly used in construction, mining, and material handling industries for lifting, pushing, and pulling heavy loads.

Q: How do long-stroke hydraulic cylinders ensure safety during lifting operations?

A: Long-stroke hydraulic cylinders are equipped with advanced safety features such as load-holding valves, pressure relief valves, and position sensing systems. These mechanisms prevent overloading, ensure stable positioning, and provide real-time feedback on cylinder operation, enhancing overall safety during lifting operations.

Q: Are long-stroke hydraulic cylinders environmentally friendly?

A: Long-stroke hydraulic cylinders are designed to be energy-efficient, minimizing power consumption during operation. Additionally, their robust construction and precision engineering contribute to their long lifespan, reducing the need for frequent replacements and thus minimizing waste generation.

Hydraulic Cylinder Manufacturer

Hydraulic Cylinder Application

Hydraulic Cylinder Factory