Pulp and Paper Canada

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Damping bearing system increases capacity 15%


July 16, 2018
By P&PC staff

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July 16, 2018 – Voith’s new SmoothRun hydropneumatic damping bearing system for winders increases capacity by 15 per cent, reducing vibrations occurring during the winding process.

Hydropneumatic damping allows for higher operating speeds and better winding results. This compact upgrade solution is suitable for Voith and Jagenberg two-drum winders.

In conventional winders without special damping, vibrations can occur at higher production speeds for certain paper grades, and these vibrations can impair winding quality. To minimize the disruptive effect of vibrations during the winding process, the production speed and acceleration rates are reduced below the maximum capability of the winder. The solution: with SmoothRun hydropneumatic damping bearings, the vibrations can be effectively reduced even at high speeds, allowing the equipment to operate at consistently high production speeds. At the same time, SmoothRun improves the winding results and reduces the overall mechanical stress on the machine.

Eliminating bottlenecks through capacity upgrades
Papier- und Kartonfabrik Varel (PKV), based in Lower Saxony, produces high-quality corrugating medium and testliner on its PM 5. Until now, the existing VariFlex M had to be run at a lower speed when producing paper grades sensitive to vibrations. The winder could barely keep up with the production of the paper machine.

The design of the hydropneumatic damping bearings allows the winder to be operated at maximum speeds.

“Following commissioning of the new bearing system we were able to reduce vibrations for all paper grades and increase speeds,” Michael Wolff, line manager equipment at PK Varel, said. “We are currently optimizing the settings of the bearing system with intensive support from Voith. Following this optimization phase we assume that the speed of the winder can be increased. While further enhancements together with Voith are being made the winder can keep pace with the production of the PM 5.”

Voith is helping the company achieve this goal by providing intensive support, e.g. by performing vibration measurements.

Wide range of winder upgrades
Voith offers a wide selection of upgrades, enabling existing winders to be specifically adapted to today’s requirements. For further information, visit http://voith.com/winder-upgrades.