Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63J—AUXILIARIES ON VESSELS
  • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
  • B63J2/12—Heating; Cooling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
  • B63H20/001—Arrangements, apparatus and methods for handling fluids used in outboard drives
  • B63H20/002—Arrangements, apparatus and methods for handling fluids used in outboard drives for handling lubrication liquids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
  • B63H20/14—Transmission between propulsion power unit and propulsion element
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H21/00—Use of propulsion power plant or units on vessels
  • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
  • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
  • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
  • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P3/00—Liquid cooling
  • F01P3/20—Cooling circuits not specific to a single part of engine or machine
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P3/00—Liquid cooling
  • F01P3/20—Cooling circuits not specific to a single part of engine or machine
  • F01P3/207—Cooling circuits not specific to a single part of engine or machine liquid-to-liquid heat-exchanging relative to marine vessels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
  • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
  • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
  • B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
  • B63H2005/1256—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with mechanical power transmission to propellers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H21/00—Use of propulsion power plant or units on vessels
  • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2050/00—Applications
  • F01P2050/02—Marine engines
  • F01P2050/06—Marine engines using liquid-to-liquid heat exchangers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2050/00—Applications
  • F01P2050/24—Hybrid vehicles
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/02—Gearboxes; Mounting gearing therein
  • F16H2057/02034—Gearboxes combined or connected with electric machines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/02—Gearboxes; Mounting gearing therein
  • F16H57/032—Gearboxes; Mounting gearing therein characterised by the materials used
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/04—Features relating to lubrication or cooling or heating
  • F16H57/042—Guidance of lubricant
  • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
  • F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/04—Features relating to lubrication or cooling or heating
  • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
  • F16H57/0436—Pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/04—Features relating to lubrication or cooling or heating
  • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
  • F16H57/0469—Bearings or seals
  • F16H57/0471—Bearing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/04—Features relating to lubrication or cooling or heating
  • F16H57/048—Type of gearings to be lubricated, cooled or heated
  • F16H57/0493—Gearings with spur or bevel gears 

Definitions

• Cooling system that cools the electric machine and surrounding components such as the electrical energy storage and power electronics are possible.
• Combustion engines on boats are normally cooled by seawater that is run either directly through the motor or through a heat exchanger.
• Outboard engines can be directly cooled by seawater with a water intake and a water outlet at the lower part of the engine, close to the propeller.
• Inboard engines provided, e.g., with a sterndrive normally has a water inlet and a water outlet in the sterndrive or arranged through the vessel hull.
• Drive units comprise rotating parts in need of lubrication. It is desired to provide a lubrication system which is efficient and at the same time cost effective. Since spatially efficient drive units are desired, compact lubrication systems are preferred. At the same time, marine propulsion systems should be both mechanically robust and easy to maintain. Space is often limited on a marine vessel; hence compact drive units are highly desired. This desire for compact design is often in conflict with, e.g., cooling requirements of the drive unit components.
• the drive unit comprises a drive unit body with a first part and a second part.
• the first part of the drive unit body is arranged elongated along a center plane of the drive unit and supports a propeller shaft on a lower end.
• the center plane being vertical and extending in a longitudinal direction of the marine vessel in use.
• the second part of the drive unit body is attached to the first part at an upper end of the first part and arranged extending along a hull plane perpendicular to the center plane and extending in a lateral direction of the marine vessel in use.
• the drive unit body comprises a closed cooling compartment arranged to be fluidly connected to a closed cooling circuit configurable to cool one or more electric components of the marine vessel, where the closed cooling compartment has an extension parallel to the hull plane in the second part which exceeds the extension parallel to the hull plane in the first part.
• a plurality of ribs is formed in the first part of the drive unit body arranged to protrude into the closed cooling compartment.
• the ribs extend in a direction parallel to the center plane and transversal to a coolant flow in the closed cooling compartment.
• the ribs disturb the laminar flow of the coolant, and therefore increase the heat transfer between coolant and the surrounding seawater.
• the closed cooling compartment can optionally be separated into two parts by an inner wall aligned with the center plane, where additional ribs are arranged protruding out from the inner wall and into the closed cooling compartment.
• the ribs provide increased cooling capacity, and also increase the stiffness and mechanical strength of the drive unit, in particular its ability to resist bending.
• the ribs arranged protruding out from the inner wall can be offset with respect to ribs protruding into the closed cooling compartment from an outer wall of the drive unit body to further promote heat transfer between coolant and surrounding seawater.
• external fins are configured to extend out from the second part parallel to the center plane. These fins do not hamper drag performance significantly but increase the effective contact surface with the surrounding seawater, through which heat may propagate from the coolant to the surrounding seawater.
• the drive unit body can also be at least partly formed in a Manganese bronze alloy or in Nibral, which are materials well suited for transferring heat from the coolant to the surrounding seawater in an efficient manner.
• the closed cooling compartment is preferably arranged in a forward part of the drive unit and facing in a travelling direction of the marine vessel in use. This location allows for a relatively large contact area with the surrounding seawater, with maintained hydrodynamic performance compared to if the closed cooling compartment would have been located in the rear of the drive unit.
• Marine vessels are also disclosed herein which are associated with the above discussed advantages.
• Figure 1 schematically illustrates a marine vessel comprising an example drive unit
• Figure 2 shows a front view of an example marine vessel drive unit
• Figure 3 illustrates a cutout side view of an example drive unit
• Figure 4A illustrates another cutout side view of an example drive unit
• Figure 4B is a cross section top view of an example drive unit
• Figures 5-6 show cross section top views of example drive units
• Figure 8 schematically illustrates a drive unit with an integrated coolant pump
• Figure 9 illustrates a drive unit geometry with conduits for coolant and lubricant
• Figure 10 shows details of an oil channel arrangement in a drive unit
• Figure 11 illustrates details of a closed cooling compartment in a drive unit
• Figures 12-13 show details of a planetary gear arrangement.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• General Engineering & Computer Science (AREA)
• General Details Of Gearings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=87845831

Family Applications (1)

Country Status (2)

Family Cites Families (3)

• 2023
  • 2023-08-22 WO PCT/EP2023/072963 patent/WO2024052108A1/en not_active Ceased
  • 2023-08-22 EP EP23761489.6A patent/EP4584155A1/de not_active Withdrawn

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