Hydraulic Expansion Couplings: Precision Shaft Fixing & Rapid Changeover Solutions

1. Product Overview

In film lamination, steel rolling, or industrial printing systems, the connection between the drive shaft and the roller shaft requires extreme precision. Hydraulic Expansion Couplings are advanced solutions designed to eliminate mechanical backlash, ensure absolute concentricity, and optimize equipment changeover times.

2. Intelligent Operating Principle

• Installation Phase: Once the roller shaft is in position, hydraulic pressure is pumped into the coupling, causing the metal sleeve to expand uniformly and grip the shaft surface tightly. This mechanism eliminates all gaps between the drive shaft and the roller, minimizing eccentricity and vibration during high-speed operation.

• Removal Phase: When a shaft change is required, simply release the hydraulic pressure. The coupling automatically contracts to its original dimensions, allowing the shaft to be withdrawn and a new one installed easily and quickly without the need for forced impact.

3. Standard Technical Specifications

The product is designed with flexibility to suit various machinery scales:

• Supported Shaft Diameters: Ranges from 30 mm up to 720 mm.

• Maximum Transmission Torque: Accommodates light loads from 0.3 kN·m up to heavy-duty applications of 372 kN·m.

4. Superior Benefits for Production Lines

• Enhanced Product Quality: By eliminating eccentricity, the surface of the rolled material is more uniform, significantly reducing technical tolerances.

• Drive System Protection: Reduced vibration extends the service life of bearings, gearboxes, and motors.

• Optimized Downtime: The rapid shaft assembly and disassembly process increases the overall productivity of the plant.

• High Durability: The sealed structure withstands high pressures and harsh industrial environments.

5. Typical Applications

• Steel & Metal Industry: Plate rolling mills, pipe mills, and wire drawing machines.

• Paper & Printing Industry: Paper reel shafts and large-format packaging printing presses.

• Plastic Film Production: PE and PVC lamination systems requiring absolute precision.