Silence at last with CENTALINK – the silent driveshaft
At the Hannover Fair (MDA), April 16 – 20, 2007, CENTA will be presenting CENTALINK, a noise-dampening, torsionally stiff shaft for absorbing considerable axial, radial and angular misalignments. The coupling has a torque range of 2.5 kNm to 540 kNm and has proven all it’s worth in particular in wind power plants, rail vehicles as well as marine main and auxiliary drives.
The internationally patented CENTALINK consists of links which are designed for efficiency using flexible bushes for push and pull. Each link has a cylindrical flexible bush which is connected radially to the hub, and a spheroid rubber bush, which is connected axially to the flange. The innovative design offers a highly flexible and easy to assemble link coupling.
The arrangement of the bushes provides a total of four interruptions of sound and vibrations on their way through the shaft resulting in a substantial dampening effect. The flexible bushes allow easy visual checks, in contrast to standard steel multiple-disc clutches. In addition, the links can be changed in case of wear without special tools, allowing speedy and uncomplicated installation and repair of the otherwise maintenance-free shaft.
Besides transmission of torque, the stiff CENTALINK can also absorb axial, radial and angular misalignments - due to installation/assembly or operation - with only minor reaction forces, thus reducing stress on the driven equipment side as well as on the driven generator. The shaft has no play and is fail-safe, and, moreover, excels by considerable durability and long service life.
The tube of the CENTALINK is either made of thin-walled steel or of carbon-fibre composite of up to 10 m length per section. Such lengths allow spanning long shaft distances. If applications require very high insulation values, a new fibre-glass design will be used. The terminal steel hub is fixed to the fibre-glass tube by a fail-safe agglutinating method. This procedure ensures fivefold static safety to nominal torque. Long and systematic analyses of agglutinating processes and a number of intensive tests on the agglutinated tubes were performed before the method was implemented.
The shaft can be connected to the driven unit by means of a slip clutch, the CENTA Torque Hub. In case of torque impulses, e.g. occurring in wind turbines after generator short-circuits, the shaft will slip through the torque hub, protecting connected equipment and thus the complete plant from overload damages. Each torque hub is tested and adjusted at the test bench, the pertinent slipping torques are recorded in a measuring protocol.
Showcased at the Hannover Fair (MDA), April 16 – 20, hall 25, stand B 28.
The innovative CENTA couplings and drives are always based on the latest technology. CENTA has a long history of innovations. It has been offering a wide range of flexible couplings and shafts for almost four decades, which propelled the company into a leadership position in various industries, including marine engineering and the energy sector. Further information available at CENTA Antriebe Kirschey GmbH, Bergische Straße 7, 42781 Haan/Germany. Phone: +49-2129-9120, Fax: +49-2129-2790, or visit our website at www.centa.info
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