Sling Couplings

The multi-alignment coupling is a ground-breaking concept for delivering torque from the gear to the mill top. It is intended to take the place of the square coupling and tail bars. Like all other couplings, the SLING COUPLING is composed of a driving and a driven half. The coupling immediately connects the mill drive’s final speed reducer to the mill’s top roller. The driving half is secured to the square end of the final speed reducer output shaft, while the driven half is secured to the square end of the mill top roller. The driving half transmits torque to the driven half via Polyester Slings, hence the name SLING COUPLING. Due to the polyester slings, the design is entirely flexible and can withstand significant misalignments of the top roller about the driving gear’s output shaft. In a plane perpendicular to the coupling axis, these flexible parts create balanced couples. This removes the high bending moments and thrust generation associated with axial and radial misalignments between the gear and top roller in a single connection.

• Enhances the Mill’s extraction performance. The typical tail bar obstructs the mill top roller from freely floating. The Multi Misalignment coupling does not constrain the top roller. With the top roller free-floating, the mill operates at the planned setting and optimal hydraulic pressure, resulting in increased efficiency.
• If placed at the end of the milling process, the final bagasse moisture content will be lower.
• Misalignment between the square end of the gear shaft and the top roller, either as a result of the Top Roller tilting or as a result of an initial alignment issue in installations where the Sling Coupling is entirely absorbed. As a result, the final gear receives no considerable lateral force or bending moment.
• Mill torque and power usage are reduced.
• Crown pinion and top roller breakage are entirely eliminated.
• Negligible upkeep.