Thursday, September 16, 2021
Published: Nov 2015
  • Thrusters

Copenhagen Subsea A/S and the Rim Driven Thruster

Copenhagen Subsea A/S is a newly created company with the purpose of bringing a range of innovative products to the subsea industry. The products are based on many years of experience with building products for the demanding subsea industry.

  • 20150902_2146_hvid baggrund.jpg
  • 20150902_2134_hvid baggrund.jpg
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  • 20150902_2146_hvid baggrund.jpg Innovative: The development team behind the thruster has many years of experience with subsea equipment but had to look at other industries in order to find the right combinations of materials and production techniques
  • 20150902_2134_hvid baggrund.jpg Technological advances in materials science and production techniques, has allowed Copenhagen Subsea A/S to succeed in creating an ultra-reliable rim driven thruster with unique features.
  • 20150902_2126_hvid baggrund.jpg Low acoustic noise signature; High reliability & Increased maneuverability are just a few of the featurs of the Rim driven ROV Thruster from Copenhagen Subsea A/S

The first product series presented by Copenhagen Subsea is the rim driven thruster. Due to its simplicity, the rim driven thruster has for years been seen as the ideal thruster concept, but it has proved to be difficult to implement. Several attempts of implementing the rim driven thruster concept has failed over the years, but due to technological advances in materials science and production techniques, Copenhagen Subsea A/S has succeeded in implementing the concept resulting in an ultra-reliable thruster with unique features.

Due to the extreme harsh environment to which a subsea thruster is exposed — the realization of the rim driven concept has involved the utilization of materials with very specific characteristics. The development team behind the thruster has many years of experience with subsea equipment but had to look at other industries in order to find the right combinations of materials and production techniques, which could give the right compromise between reliability and performance required in the subsea industry.

Today one of the limiting factors in the utilization of ROV and AUV is the reliability of the thrusters. The thrusters are equally critical to the ROV operation as the rest of the sub-components — but due to the complexity of the thruster coming from moving parts; it is harder to achieve the same level of reliability as can be achieved in the non-moving parts of the system. The reliability of thrusters used in the ROV industry today is also a result of the small batch sizes in which they are produced. Copenhagen Subsea has successfully developed a series of industrialized thrusters with a significantly higher level of reliability.

Features of the Rim driven ROV thruster include:

• Low Acoustic Noise Signature:

Due to the fact that the rim driven propeller has a low tip speed of the propeller blades the noise emission from the propeller is significant lower than a normal propeller. Beside the propeller, the motor has no gears or other mechanical moving parts.

• High Reliability:

The low number of components in the thruster means that the reliability of the thruster is high.

• Increased Maneuverability:

The thrusters are responsive, powerful and easy to integrate and will provide vehicles with a unique combination of silent power and high maneuverability.

• Compact Form:

The thruster is easy to integrate the thrusters can be orderen in two versions either as a stand alone thruster for easy integration or in the compact form where the thruster can be closely integrated into the vehicle

• Symmetrical Thrust:

A unique feature or the rim driven thruster is the symmetrical construction — which means that there is no preferred front or back — the thruster will deliver the same thrust going forward as it will when going backwards

• Fluid Free:

There is no oil or other fluid inside the thruster, which can leak and pollute the surroundings.

• Hub-less Propeller:

The hub-less propeller is open in the middle, which gives the advantage that seaweed and pieces of rope can pass right through the thruster with a low risk of entanglement.

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