Over the past 20 years, the use of powder couplings for marine applications has increased considerably, with most of the installations being in tugs, from large ocean-going vessels to small river boats. Tugs need to be highly manoeuvrable with rapid reversing capability and must be able to run their engines up to full power quickly without snatch or overload on the rest of the transmission. River tugs and oil-rig supply vessels also have to operate in areas where large amounts of debris may be present, which could cause serious damage unless the transmission has the ability to "slip" in the event of propeller fouling. In addition, some river tugs operate in very shallow waters and the couplings have to provide adequate protection for the engine and transmission in the event of grounding. Powder-couplings can also be used in pilot boats and cargo ships, and have been used in hovercraft. It is expected that with the recent development of "double" units a wider market will become available. These new couplings have two chambers and two rotors, so that although of the same diameter as the single unit, their power is double. This type of unit allows powder couplings to be installed in vessels where previously the combination of a large power requirement and high operational speeds put them beyond the design parameters of single couplings. The principle of operation is briefly described.

  • Corporate Authors:

    Trade and Technical Press, Limited

    Crown House
    Morden, Surrey SM4 5EW,   England 
  • Publication Date: 1979-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00308988
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Mar 31 1980 12:00AM