Winder Expansion and Contraction Cylinders

Reel Expansion and Contraction Cylinders

The reel expansion and contraction cylinder comprises a double-acting sequential hydraulic cylinder and a rotary joint. The hydraulic cylinder regulates the expansion and contraction of the steel reel diameters by extending and retracting during rotation. To accurately display and control the stroke of the pressure cylinder, a displacement sensor can be integrated into the telescopic mechanism. Additionally, a pressure sensor can be installed if required to ensure precise monitoring and control of the telescopic push and pull movements.

Two exhaust pressure measuring joints are installed above the rotary joint, allowing for convenient gas venting from both chambers of the telescopic cylinder and real-time detection of oil pressure in these chambers. For easy use, four oil inlet and outlet ports are positioned on both sides of the rotary joint's horizontal axis. You can select any two ports for use, while the remaining two can be sealed with sealing screws.

Uranus expansion and contraction cylinders are equipped with high-quality reciprocating and rotary seals. Precision bearings are installed in the rotary joint, ensuring reliability and  long service life. In the past 20 years, we have developed and produced over a thousand expansion and contraction cylinders for global users. These cylinders are widely used in both cold and hot rolling, plate and strip reeling machines,as well as many engineering machinery, injection molding machinery and chemical equipment.

Uranus has produced expansion and contraction cylinders with diameters ranging from a minimum of 100mm to a maximum diameter of 900mm. In addition, they have a maximum operating pressure of 25MPa. These cylinders can be custom-designed and manufactured to meet specific customer needs or can be produced based on drawings provided by customers.

Below are examples of several types of expansion and contraction cylinders:

1.Expansion and contraction cylinder (two cylinders in series) Large cylinder diameter: 900; rod diameter: 360; stroke: 17;
Small cylinder diameter: 850; rod diameter: 360; stroke: 77 
Built-in displacement sensor
Operating pressure 10MPa; test pressure: 15MPa 
Rated speed: 450r/min

2.Reel-Expansion-and-Contraction-Cylinders14.jpg
Reeler and roller expansion and contraction cylinder diameter: 250; rod diameter: 110; stroke: 113.5; buffer stroke: 30;
Built-in displacement sensor
Operating pressure 14MPa; test pressure: 21MPa
Rated speed: 650r/min 

3.Expansion and contraction cylinder (two cylinders in series)  Large cylinder diameter: 760; rod diameter: 315; stroke: 20;
Small cylinder diameter: 680; rod diameter: 315; stroke: 75  
Built-in displacement sensor
Operating pressure 12MPa; test pressure: 21MPa 
Rated speed: 450r/min 

4.Rotary telescopic cylinder diameter: 320; rod diameter: 180; stroke: 74;
Built-in displacement sensor   Rotating joint jacket   Cooling water jacket
Operating pressure 21MPa; test pressure: 25MPa;
Rated speed: 3800r/min