Classifications

• • 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
  • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
  • B63H23/22—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing
  • B63H23/24—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing electric
• • 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
  • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
  • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
• • 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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• • 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
  • B63H2005/1258—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with electric power transmission to propellers, i.e. with integrated electric propeller motors

Definitions

• Propulsion device for a naval vessel.
• the invention relates to a device for propelling a naval vessel such as a ship, a submarine, an oil platform or a barge.
• Propulsion devices are known for ships or more generally for buildings at least partially submerged in a body of water such as a sea or an ocean.
• Such propulsion devices may include a nacelle on which is mounted at least one rotary propulsion propeller driven by a motor.
• the nacelle which has a profiled shape, is generally fixed to the end of a leg mounted to rotate around a direction perpendicular to the longitudinal direction of the building, according to which this building moves in water.
• the leg which is supported by the structure of the building is associated with a pivoting device making it possible to adjust the orientation of the leg and of the nacelle.
• propulsion devices comprising at least one engine integrated into the nacelle.
• Such an arrangement makes it possible in particular to eliminate the drive motor disposed in the building and the members for transmitting rotation to the propellers.
• the stator of the motor is fixed around the part of the nacelle on which the rotor is mounted, facing rotor.
• the rotor is mounted between two parts of the stator and opposite the stops making it possible to transmit the thrust to the nacelle and, through it, to the ship.
• the nacelle has an outer casing of generally profiled shape inside which are arranged the stator parts and the rotor parts of the electric propeller drive motor.
• the envelope of the nacelle comprises at least one annular opening allowing the passage of the propellers fixed to the stator, towards the body of water in which the nacelle is immersed.
• propellers constituting one or more pairs of counter-rotating propellers, that is to say propellers rotating in opposite directions and having blades of propeller with reversed orientations placed one after the other. This increases the efficiency of the propulsion device.
• the object of the invention is therefore to propose a device for propelling a naval vessel in a longitudinal direction of the vessel, comprising a nacelle on which is mounted at least one rotary propeller and at least one electric drive motor.
• the propeller and at least one suspension and orientation leg of the nacelle substantially perpendicular to the longitudinal direction of the building, pivotally mounted around an axis perpendicular to the longitudinal direction, by a first end on a part of the building structure and secured to the nacelle by a second end, this propulsion device making it possible to considerably simplify the construction of the nacelle, in the case of propulsion provided by at least one pair of counter-rotating propellers.
• the nacelle comprises a substantially longitudinal steering shaft secured to the second end of the suspension and orientation leg, on which is mounted at least one pair of counter-rotating propellers, each of the propellers being secured to a support rotor rotatably mounted around the nacelle shaft, carrying at least one rotor element placed opposite at least one stator fixed around the nacelle shaft and disposed inside the support rotor which constitutes at least part of an envelope of the nacelle.
• Figure 1 is a side elevational view in partial section of the lower part of a building and the propulsion nacelle of this building.
• Figure 2 is an enlarged view of part of Figure 1.
• Figure 3 is a side elevational view in partial section of the lower part of a building and the propulsion nacelle of this building, according to an alternative embodiment.
• FIG. 1 we see a lower part 2 of the structure of a ship generally designated by the reference 1.
• the lower part 2 of the structure is crossed by an opening in which is engaged an upper end part d 'a suspension and orientation leg 3 arranged vertically and rotatably mounted in the structure 2 around its vertical axis 4.
• a nacelle 5 for propelling the ship 1 is fixed to the lower end of the suspension and orientation leg 3.
• Orientation means 6 fixed to the structure 2 of the building 1 make it possible to orient the suspension and orientation leg 3 and the nacelle 5 around the vertical axis 4 of the strut.
• the nacelle 5 ensures the propulsion of the ship, in a general longitudinal direction of this ship substantially parallel to the axis 7 of the nacelle.
• the nacelle 5 comprises a longitudinal shaft 8 fixed relative to the nacelle, of axis 7, of tubular shape, on which are mounted two propulsion assemblies 9 and 10 of the ship 1.
• the nacelle 5 further comprises profiling elements 11 and 12 fixed to the axial ends of the shaft 8.
• the propulsion assemblies 9 and 10 each comprise a first propulsion unit respectively 9a and 10a and a second propulsion unit, respectively 9b and 10b.
• the first and second propulsion units of a propulsion assembly comprise counter-rotating propellers, that is to say propellers rotating in opposite directions to one another, the blades 14 of which are oriented in an inverted manner.
• the propulsion units 9a, 9b, 10a and 10b are identical. Only one propulsion unit will therefore be described with reference to FIGS. 1 and 2.
• the propulsion unit (for example 9a) comprises an electric drive motor 13 and a propeller constituted by blades 14 fixed on a rotor support 15 of the motor 13 whose stator 16 is disposed inside the rotor support 15 produced in an annular form.
• the rotor support 15 is rotatably mounted on the shaft 8 of the nacelle, around the axis 7, by means of two bearings 17 and 17 '.
• the rotor support 15 is made in two parts which are assembled together according to a junction zone 19.
• Each of the two parts of the rotor support has a circular flange on the internal surface of which are fixed rotor elements 18 which can be constituted for example by permanent magnets distributed circumferentially on the surface of the flange, around the axis 7 of the nacelle also constituting the axis of rotation of the motor 13.
• the stator 16 comprises a stator support 20 in the form of a disc fixed around the shaft 8 of the nacelle, on which are fixed stator elements 21 preferably constituted by windings associated with ma- genetic.
• the stator elements 21 are distributed circumferentially on the stator support 20 and arranged opposite the rotor elements 18, on each of the faces of the stator support.
• the motor 13 constitutes a motor having a double discoid structure.
• the stator windings 21 are powered so as to generate an axial direction field, that is to say parallel to the axis of rotation 7 of the motor rotating around the axis 7.
• the stator supply also makes it possible to run the motor at a variable and adjustable speed.
• the stators of two drive motors of two propulsion units such as 9a, 9b of a propulsion assembly such as 9 are supplied so as to create fields rotating in opposite directions, so that the propulsion assemblies 9a and 9b rotate in opposite directions.
• the stator supply produces an overall rotation of the rotor supports and of the blades carried by the external lateral surface of the rotor supports.
• the counter-rotating propellers of each of the propulsion units rotate in opposite directions at the same speed or at a very slightly different speed.
• the propellers such as 9a and 10a constituting the propellers located upstream in the direction of movement of the ship given by arrow 22, constitute propelling propellers, the propellers located immediately downstream of the propellers 9a and 10a of the assemblies 9 and 10 constituting straightening propellers.
• the righting propellers 9b and 10b which rotate at the same speed or at a speed very slightly different from the speed of the propelling propellers, absorb the same power as the propelling propellers.
• the various drive motor assemblies of the propulsion units 9a, 9b, 10a and 10b can be controlled independently of one another to rotate the propellers in the desired direction and at the speed required.
• the construction of the nacelle is particularly simple, since the envelope of the nacelle is constituted solely by profiiage elements 11 and 12 and by the rotor supports 15 carrying the blades 14 of the propellers.
• the stator supports are fixed directly to the shaft 8 of the nacelle and the rotor supports are themselves fixed around the shaft of the nacelle, by means of bearings which ensure the transmission of the propelling force to the nacelle and the ship.
• the rotor supports constituting parts of the shell of the nacelle are not necessarily made in a watertight manner and do not have to withstand the pressure of the water in which the ship is moving. .
• the rotor supports 15 are traversed by openings such as 23 allowing the passage of seawater.
• the elements of the engine 13 must therefore be provided with insulation resistant to seawater.
• the rotor elements of which are made up of permanent magnets, special protection must be provided for the magnets, of the plate type made of composite material, paint or resin.
• the bearings 17 and 17 ' are constituted by thrust bearings making it possible to transmit the propulsion forces to the nacelle and to the ship.
• These bearings can be produced in the form of hydrodynamic bearings operating in seawater. It is also possible to use a single double-acting thrust bearing produced in the form of a hydrodynamic bearing operating in seawater.
• the shaft 8 is made of three parts 8a, 8b and 8c which are assembled during assembly of the propulsion device.
• the central part 8a of the shaft is integral with the suspension and orientation strut 3 and carries the propulsion units 9b and 10a, the right part 8b carries the propulsion unit 9a and the left part 8c, l propulsion unit 10b.
• the propulsion assemblies 9 and 10 consist of counter-rotating propellers.
• One of the propulsion systems could have a single propeller.
• the propulsion device according to the invention may include a nacelle whose shaft supports any number of propulsion assemblies each consisting of two counter-rotating propellers driven by an electric motor.
• the propulsion device according to the invention can be used on any type of ship and on any installation at least partially submerged such as an oil platform or a barge.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Power Engineering (AREA)
• Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
• Wind Motors (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9534711

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (6)

Citations (9)

• 1998
  • 1998-12-30 FR FR9816672A patent/FR2788032B1/fr not_active Expired - Lifetime
• 1999
  • 1999-12-22 WO PCT/FR1999/003260 patent/WO2000040460A1/fr not_active Application Discontinuation
  • 1999-12-22 JP JP2000592183A patent/JP2002534316A/ja active Pending
  • 1999-12-22 EP EP99961152A patent/EP1140618A1/fr not_active Withdrawn

Patent Citations (9)

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