LamaLo Technology Inc.

  Other Projects

 

CCGS Gordon Reid – SAR Cutter (2 x 1832 kW): The CCGS Gordon Reid was delivered in 1990 by Versatile Pacific, in Victoria, BC.  The vessel is an intermediate search and rescue (SAR) cutter and has an overall length of 50 m and a draft of 5.35 m, with a maximum rated speed of 16.5 knots.  Each of the two propellers is driven by two diesel engines, each with a rating of 916 kW at 750 RPM, through a twin input – single output gearbox. Each propulsion shaftline is approximately 13 m long, and is supported by water lubricated strut and sterntube bearings and one lineshaft bearing. 

 

The vessel was grounded.  The propeller blades were broken, and the propeller shaft and rudder stock were bent.  A visual inspection of the strut and sterntube bearings indicated no damages.  The shaft was not excessively bent and the shipyard straightened the shaft within tolerance.  Welding repair was required on the top of the strut frames, which were found to be cracked.

 

A propulsion shaftline alignment theoretical analysis and measurement program was conducted.  The alignment condition was measured using optical, jack-up load, and strain gauge alignment techniques.  The port and starboard strut bearings were found to be misaligned such that the aft ends of the bearings were higher than the forward ends and they were horizontally skewed.  This misalignment was consistent with the damage observed to the shafting and propeller, and would have resulted in damage to the bearings if operated under this condition.  To correct for this misalignment the port and starboard strut bearings were replaced with new bearings and realigned to be concentric, parallel and in line with the gearbox output shaft.

 

With the vessel afloat, the shaft was realigned by adjustment to the lineshaft bearing.  The subsequent alignment measurements showed acceptable loads on the gear shaft bearings.  The CCGS Gordon Reid underwent sea trial the in April 2004.  It has been reported that no significant shaft vibrations were present and all bearing temperatures were acceptable.

MV Oscar Dyson – NOAA Fisheries Research Vessel (1 x 2300 kW):  National Oceanic and Atmospheric Administration (NOAA) 40-Day endurance fisheries research vessels (FRV40-1) are under construction at VTHalter Marine Moss Point Yard.  The vessels are 209' long with a beam of 49', a draft of 19.3' / 30.0' (center board up/down), a full load displacement of 2,240 metric tons, and a design speed of 20 knots.  The ships have a range of 12,000 nautical miles, a trial speed of 14 knots, and carry a complement of 39 persons. 

 

The vessels have a single screw propeller configuration.  The 5 bladed fixed pitch propeller is driven by two tandem DC Motors, each rated at 1150 kW at 134 RPM.  The propulsion shaftline length is about 49' long, and is supported by one sterntube bearing, one intermediate shaft bearing, and one support bearing on the thrust shaft.  Each of the two motor rotor shafts is supported by two bearings.

 

LamaLo Technology was contracted to conduct a theoretical propulsion shaftline alignment and vibration analysis, provide the propulsion shaftline installation and alignment procedures, and to measure and assess the shaft torsional and lateral vibrations during sea trials.  The strain gauge technique was used to conduct the final alignment prior to chocking.  The 1st of 4 vessels is to be delivered in 2004.

 

 

             

CAPS Motors and Test Motor                                          Physical Torque Calibration                         Vibration Measurements

 

Center for Advanced Power Systems (CAPS) Test Bed (2 x 2500 kW):  The Center for Advance Power Systems (CAPS) Test Bed Facilities has been developed to conduct applied research on marine propulsion motors.  It consists of two tandem 2.5 MW AC Electric motors driving a test motor.  The AC motors are used to replicate propeller loads on the test motor.  LamaLo Technology Inc. (LLT) was contracted for the following:

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