Getzner: PU bearings minimise vibrations on patrol boats
Lita Ocean, a leading shipbuilding and marine services company in Singapore, recently built six patrol crafts ordered by the Maritime and Port Authority of Singapore. To efficiently minimise noise and vibrations in the wheelhouses of the 17 m long vessels, the naval architects and engineers relied on the elastic polyurethane material Sylomer from Getzner Werkstoffe.
“The decoupling of the wheelhouse with our in-house developed polyurethane material Sylomer lowers noise levels significantly and ensures standard-compliant working conditions”, explained Keith Wong, Area Sales Manager Asia Pacific at Getzner Werkstoffe. “Sylomer bearings help to decouple sources of vibration disturbances such as drive motors, HVAC equipment or pumps and therefore protect sensitive electronic components in the wheelhouse. That leads to a longer service life of the vessel’s structure and infrastructure.”
After completing the installation works, the Lita Ocean experts, among them naval architect Win Lu and Assistant General Manager Mohamed Tamiri, measured the noise level in different areas of the vessel. The maximum level recorded in the wheelhouse was 79.2 dB – a very satisfying result, below the target level of 80 dB at maximum load set by Lita Ocean. To determine an ideal anti-vibration solution for the patrol boats, the naval architects calculated all important parameters and decided to use two different types of Sylomer in order to achieve the best optimisation level: the soft Sylomer SR11, and the stiffer SR42. Experts from Getzner Werkstoffe accompanied the process with technical consulting, for example regarding the type of adhesive used or the installation of elastic washers.
According to Getzner, its polyurethanes convince with proven long-term behaviour even when exposed to salt water. Sylomer performs in many different applications since decades – its very good long-term behaviour has not only been proved in numerous reference projects, but also approved by notified research and test institutes such as the Technical University in Munich, said the company.
For the shipbuilding sector, the company has introduced the specialised and fire-retardant anti-vibration product Sylomer Marine. The IMO/SOLAS certified product is mostly used for the bearing of ships hulls. Thanks to its resilience and outstanding vibration isolation and vibration dampening qualities, Sylomer Marine reduces wear and noise pollution and minimizes damage to the infrastructure.