Marine coupling shows its flexibility
A
Centa Transmissions product story
Edited by the Engineeringtalk editorial team
Jul 13, 2004
Centa Transmissions had to overcome a significant gearbox location problem when it was asked to substantially reduce noise and vibration from the transmission of "Sea Shepherd".
Yorkshire-based flexible coupling manufacturer Centa Transmissions had to overcome a significant gearbox location problem when it was asked to substantially reduce noise and vibration from the transmission of "Sea Shepherd", the new 15.25m pilot launch for the Aberdeen Harbour Board.
Propulsion on the vessel is by twin resiliently mounted Scania DI12 41M engines developing 265 kW at 1880rev/min, driving close coupled twin disc MG 5019SC gearboxes having a 2.45:1 reduction ratio, PTO clutch and hydraulic pump.
Centa's solution considered the Centaflex AGM coupling design, but designers came up against a general problem with most marine gearboxes, in that when the gearbox was originally designed, no thought was given to the use of flexible couplings and the oil pump was positioned very close to the output flange.
On the gearbox in question, the output flange is 7.25in diameter and only a coupling of maximum diameter 7.5in would fit without fouling the oil pump.
A 4in spacer would have been required to clear the pump and in addition a manually clutched PTO and hydraulic pump required an even longer spacer at 500mm.
A spacer of this length plus the Centaflex AGM coupling would have been too long for the installation and would have upset the flexible mounting arrangement, so a composite universal joint and Centaflex Series A Cardan shaft was developed.
To achieve the required noise and vibration insulation level, a flexible element providing a long articulation length allows significant engine movement to reduce noise and vibration, without the need for additional spacers.
Dennis Davidson, of Murray Cormack Associates, who designed the vessel said: "Centa's coupling design achieved a very low noise level throughout the boat".
Centa manufactures a wide range of flexible couplings and driveshafts with torque capacities up to 1MNm, covering every application from canal and riverboats to workboats and larger sea-going vessels.
Not what you're looking for? Search the site.
Google Ads
Contact Centa Transmissions
Related Stories
- Hydro-Service chain acts like caterpillar tracks
- Retractable roof uses FAG roller bearings
- KTR couplings increase life of water jet drives
- Elastic bearing couplings quieten transmission
- Filters clean up on excavator hydraulics
Articles by product category
- Consultancy and Services (903)
- Machine Building (4,517)
-
Engineering Design Software (6,179)
- Engineering Design Software (12)
- 2D CAD software (200)
- 3D CAD software (1,157)
- FEA and structural analysis software (369)
- Fluid, thermal, noise, vibration software (334)
- Simulation, modelling, validation software (914)
- Rendering, visualisation, styling software (196)
- Materials design and moulding design software (151)
- Process, instrumentation, automation software (258)
- Electrical design software (164)
- Publishing and documentation software (229)
- Maths, charting, statistics, QA software (317)
- Data, document management software (310)
- CAM, CNC, production management software (568)
- File conversion software, data capture (351)
- PLM and collaboration software (649)
-
Drives, Motors and Controls (3,361)
- Drives, Motors and Controls (1)
- Precision Motors and Gears (411)
- Industrial Drives/Controls (1,276)
- Linear Drives and Motors (114)
- Industrial Motors (497)
- Stepper and Servo Drives, Motors, Controls (1,060)
- Small Mechanical Components, Joining, Tools (1,975)
-
Control and Instrumentation (5,028)
- Plantwide control (1,324)
- Plant- and Machine-Wide Communications (1,174)
- Smaller-Sized PLCs (387)
- CNC and Motion Controllers (184)
- Mid-range and Large PLCs (201)
- Power Supplies, Uninterruptible Power (562)
- HMIs/Operator Interfaces (294)
- Logic Controllers, Timers and Relays (96)
- Cabling, Conduit, Signal Conditioning (806)
-
Monitoring, Measurement and Quality (5,459)
- Monitoring, Measurement and Quality (1)
- Data acquisition Software and Communications (494)
- Data Acquisition Hardware and PC I/O Boards (472)
- Electrical and Electronic Testing, PAT Equipment (630)
- Form/co-ordinate, optical, vision instruments (703)
- Gauges, Indicators and Instruments (440)
- Data loggers (422)
- Materials testing equipment (421)
- Telecomms/network test equipment, software etc (154)
- Testing and Calibration Services and Information (500)
- Testing, analysing and monitoring equipment (1,222)
-
Electrical and Electronic Equipment Design (4,160)
- Batteries, chargers and circuit protection (555)
- Connectors, Terminals, Busbars, Slip Rings (679)
- Enclosures and Equipment Cooling Fans (709)
- Knobs, Handles and Enclosure Hardware (420)
- PCs and Embedded Systems (798)
- Electrical and Electronic Subassemblies (369)
- Electrical and Electronic Components (630)
-
Materials and Processing (2,963)
- Materials and Processing (5)
- Materials and components (2,215)
- Rapid Prototyping (458)
- Materials processing and testing (285)
-
Engineering Industry News, Resources (6,093)
- Engineering Industry News, Resources (4)
- Engineering Business News, Views (388)
- Engineering Exhibitions, Events (562)
- Engineering Conferences (425)
- Engineering Seminars (400)
- Engineering Industry Developments, Awards (633)
- Engineering Guides, Newsletters (349)
- Engineering Recruitment, Employment (219)
- Engineering Training Courses (433)
- Engineering Education, Resources, Standards (838)
- Engineering Industry Reports, Surveys (597)
- Electronic Resources for Engineers (278)
- Health and Safety Legislation (402)
- Health and Safety Strategy, Risk Assessment (113)
- Health and Safety Consultancy, Software (175)
- Health and Safety Events, Training, News (277)
-
Powertrain Design (3,598)
- Powertrain Design (2)
- Bearings (939)
- Chains and belts (326)
- Gears, brakes, couplings and engines (1,441)
- Hydraulic Components (471)
- Lubricants (418)
-
Capital Equipment (3,387)
- Capital Equipment (1)
- Manufacturing Machinery and Plant Equipment (468)
- Production line blowers and fans (62)
- Compressors and Air Treatment (510)
- Electronics Manufacturing, Tools, Instruments (192)
- Electrical hardware (131)
- Machinery and Production Equipment (1,093)
- Robotics, Handling and Storage (930)
-
Sensors (7,080)
- Sensors (8)
- Accelerometers and Vibration Sensors (427)
- Loadcells, Force Sensors, Torque Sensors (699)
- Pressure sensors (621)
- Flowmeters and Flow Sensors (618)
- Level Sensors and Leak Detectors (527)
- Linear Position Sensors (399)
- Rotary Position, Tilt and Angular Sensors (546)
- Proximity Sensors (700)
- Gas, Chemical, Radiation, Magnetic Sensors (284)
- Humidity and Environmental Sensors (152)
- Temperature sensors (612)
- Vision and Colour Sensors (1,384)
- Barcode Sensors (103)
- Valves, Pumps, Process Hardware (3,623)
