Nicole Gullatt_Project Engages Presentation (Spring Semester Presentation)
ROV Presentation
-
Upload
mnelicy-mabaso -
Category
Documents
-
view
99 -
download
4
Transcript of ROV Presentation
![Page 1: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/1.jpg)
Presenter:
Mr MM Mabaso
REMOTE OPERATED VEHICLE(ROV)
![Page 2: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/2.jpg)
BACKGROUND
• Deep water operations have been in many years conducted by scuba divers even at conditions where it is unsafe for human such as extremely low temperatures, mine hunting and so on. Medical literature suggest that there are potential chronic long-term detrimental effect of diving such as:
• Decompression sickness (DCS), Nitrogen narcosis, subclinical damage to brain, spinal cord, inner ear, retina and small airways of lung due to extended exposure to increased pressure underwater.
• In the 1950’s ROV’s began to be in operation but their use was very limited due to technology of that time.
OBJETIVES
Design a work class ROV to carry out subsea operations to minimise/eliminate the use of divers
![Page 3: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/3.jpg)
ROV is a tethered underwater mobile device. It is operated by a crew aboard a vessel.
Applications:• Mine hunting and mine
breaking
• Pipeline and platform Inspection
• Subsea installations
• Diver observation
• Object location and recovery
• Capturing scientific images
![Page 4: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/4.jpg)
DESIGN SPECIFICATIONS
• Maximum diving depth: 3Km
• Diving duration: no limit
• Maximum allowable operational speed: 3knots (1,54m/s)
• Frame dimensions: 1,3m0,7m1m
• Weight in air: 100Kg
• Maximum payload: 100Kg
• Propulsion system: 6 propellers and 2 ballast cylinders
• Input power demand: 2Kw
• Neutral buoyant at 1m below ocean surface
• Total variable force: 612N
![Page 5: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/5.jpg)
Launching and recovery system
• ROV is kept aboard a vessel inside a cage.
• It is launched by lifting the cage and dip it into ocean until the ROV is fully submerged.
• Rear thrusters will then propel the ROV forward.
• Recovery is performed the same way, a skilled pilot will steer ROV onto the cage.
• The cage is then brought back aboard a vessel.
![Page 6: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/6.jpg)
Propulsion and buoyancy
• Six propellers and two ballast cylinders are used for propulsion.
• There are two cylinders in x, y and z direction.
• Two ballast cylinders are used as buoyancy control device (BCD).
• Approximately 2Kw is required to drive two thrusters.
• Ballast cylinders will reduce power demand.
![Page 7: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/7.jpg)
Frame
• Frame material must have density close to sea water to allow for easy neutral buoyancy.
• Acrylonitrile Butadiene Styrene (ABS) material was used for a frame
• The frame is design with slots to reduce drag forces on the frame while leaving the room for other components.
• ABS has good corrosion resistance and high yield strength.
![Page 8: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/8.jpg)
Cage and Tether Management System (TMS)
• TMS is used to control the coiling and uncoiling of the cable to avoid over tensioning.
• Tether length is the only factor that will affect diving depth.
![Page 9: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/9.jpg)
Robotic arm and manipulators
• Robotic arm is equipped with interchangeable manipulators.
• It is driven by five motors.
![Page 10: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/10.jpg)
A good material selection and part location played a vital role in stability as it governs centre of buoyancy. This knowledge also ensured that ROV sinks before floating. However in this design conducting underwater welding will be hazardous and will require further design alterations. A further knowledge and research needs to be done to compensate for this drawback
CONCLUSION
![Page 11: ROV Presentation](https://reader035.fdocuments.mx/reader035/viewer/2022081417/58aea08f1a28abd43a8b5781/html5/thumbnails/11.jpg)
QUESTIONS?
THANK YOU