The power transmission demands of a small naval attack boat and a container ship vary greatly. Each vessel requires specialised solutions to ensure an optimal powertrain in terms of performance and reliability. This is why Stromag takes a tailored approach with its range of KMS Multi-Disc clutches for marine propulsion systems, ensuring that shipbuilders worldwide can specify units to fit the engagement/disengagement requirements of almost any powertrain.
Installed inside of a gearbox, Stromag's range of KMS clutches are suitable for a wide range of vessels including ferries, naval and container ships. This breadth of capability is illustrated by the Wet Running Multi-Disc KMS clutch, which offers a torque rating of over 2,000,000 Nm, a diameter of up to 1.2 metres and a weight of up to 4 tonnes. This classes it as the largest and most powerful marine clutch currently available 1. However, the specifications of each clutch are flexible, allowing for the needs of smaller vessels to be met too. A version which is mounted outside of the gearbox is also available. The KMS "THC"-type can be installed 'on deck' for increased design flexibility. This model features pre-treatment against corrosion, ensuring reliable operation in marine conditions.
Despite this impressive variance, the KMS range has common benefits. First, the KMS combines high power density within a relatively compact design. This delivers an excellent torque to weight ratio. With less mass to accelerate, the moment of inertia is reduced, lowering required torque. As a result, heat generated during torque transmission is minimised, protecting the reliability and performance of both clutch and gearbox. Matched with discs that offer a long service life, maintenance intervals are extended, ensuring more time at sea and less at the shipyard.
Stromag maximises these inherent benefits by adapting the KMS range to suit specific marine propulsion systems. Taking into account the speed, torque and dimensions of customer powertrains - Stromag can calculate an optimal clutch size. This allows the KMS to be mounted on almost any shaft size and fit an array of additional parts. Not only does this further optimise the operation of the clutch, but also prevents costly overspecification in terms of size and weight. Consequently, the performance and packaging requirements of both small and large vessels can be met equally without compromise.
A proven track record working with shipbuilders and marine propulsion OEMs, particularly in the Chinese market, ensures that the KMS clutch can be seamlessly integrated into pre-existing assembly processes. A focus on customisation to meet customer specifications and interfaces allows for easy fitment of the clutch into the powertrain. Stromag is experienced in delivering the product quantities required to support new build vessels. A leading brand of Altra Industrial Motion Corp., Stromag has the capability to deliver KMS clutches and technical expertise worldwide. This ensures any shipbuilder or marine propulsion OEM can specify an optimal marine clutch suitable for multiple vessel classes, designed to promote reliability.