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LSBG Hamburg is the authority responsible for the streets, bridges and waterways in the city of Hamburg, Germany. Among the city’s most critical assets are its floodgates – especially those of the central Schaartor Lock (Schaartorschleuse). With new hydraulic drive systems, the lock’s floodgates are entering a new era of reliability.
As a direct drive solution, only the hydraulic motor itself would be attached to the shaft. The supporting drive unit could be placed wherever convenient – in this case, on top of the lock. Klaas Siemens, the company contracted to do the building, had not previously worked with Hägglunds hydraulic drive systems. Moreover, Germany had recently introduced new regulations for radial gates that impacted the required power for the hydraulic system. With support from the Hägglunds team, however, all questions were resolved and the process of installing the drive was simple.
Once the old drive components had been removed, including all the cables and measurement systems, Klaas Siemens prepared a new concrete base and bracket. Afterwards, the motor was installed in the compartment and the drive unit was situated topside. With the supporting hydraulic system on top of the lock, there is now ample space in the compartment for maintenance and repairs. Moreover, the new drive has been running flawlessly since the installation – with no punch list whatsoever. The service team is supporting LSBG Hamburg with maintenance and training, but this is in order to compensate for a current lack of manpower. By the end of the five-year service agreement, LSBG Hamburg expects to have enough experienced people to handle all maintenance needs.
With things running smoothly in the Schaartor Lock’s east chamber, LSBG Hamburg is now moving forward with additional renovations. These include working with Bosch Rexroth on an emergency hand pump, which will allow the floodgate to be cranked past the self-closing point in the event that even the emergency power should fail. In addition, the plans involve still more Hägglunds drive solutions. The Schaartor Lock’s west chamber will receive its own hydraulic drive, for which the engineering process will begin this year. Another Hamburg lock, the Tiefstack Lock, will be replaced in around 10 years, and here the plan is to use Hägglunds drives as well.
Sebastian Rahe works as Sales Manager for Hägglunds products in Central Europe Sales at Bosch Rexroth AG.