JP2008183986A - Ship propulsion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ship propulsion device capable of allowing a super-conducting motor to maintain its function even when a propeller is brought into contact with an obstacle and broken. <P>SOLUTION: The ship propulsion device 1 comprises a propeller propulsion device 2 and a super-conducting motor 3. The super-conducting motor 2 comprises a stator 4 with an armature being arranged in a cylindrical shape, a rotor 5 having a super-conducting magnetic field, a coil 8 for the magnetic field for an electromagnetic clutch consisting of a super-conducting coil fixed on an end plate 7 of the rotor, and a super-conducting motor side casing 10 for housing the stator 4, the rotor 5 and the coil 8 for the electromagnetic field for the electromagnetic clutch in a water-tight manner. The propeller propulsion device 2 comprises a rotary disk 11 having a plurality of permanent magnets 12, a propeller rotary shaft 13 and a propeller 14. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a marine vessel propulsion device.

  In particular, according to the present invention, a propeller propulsion device and a superconducting motor constitute a marine propulsion device, the propeller propulsion device and the superconducting motor are separated and stored in separate watertight casings, and between the propeller propulsion device and the superconducting motor. The present invention relates to a marine propulsion device capable of transmitting power to the superconducting motor when the propeller propulsion device is in contact with an obstacle.

  Further, the present invention can share a cooling device for the superconducting field of the rotor by providing a field coil for an electromagnetic clutch comprising a superconducting coil on the end plate of the rotor having the superconducting field, and The present invention relates to a small and highly efficient marine propulsion device capable of transmitting a large torque while having a small size as compared with a conventional aircraft.

  Conventionally, various uses of superconducting motors for marine propulsion devices have been devised.

  However, the conventional marine propulsion device has a propeller provided in the outdoor unit, and the propeller of the engine unit (electric motor, diesel engine) and the outdoor unit is directly connected.

  On the other hand, the electromagnetic clutch technology itself has been conventionally known from Japanese Utility Model Publication No. 6-45358.

Japanese Utility Model Publication No. 6-45358 discloses an electromagnetic clutch used in a gas laser device. FIG. 5 of Japanese Utility Model Laid-Open No. 6-45358 and the description corresponding thereto in the specification include that an atmosphere side magnetic coupling having a permanent magnet is connected to a tip of a rotating shaft of a motor, and the atmosphere side magnetic coupling is connected via a partition wall. There is disclosed an electromagnetic clutch that is provided with a gas side magnetic coupling having a permanent magnet so as to face the gas and transmits the power of the atmosphere side magnetic coupling to the gas side magnetic coupling.
Japanese Utility Model Publication No. 6-45358

  In recent years, many marine propulsion devices used by superconducting motors have been proposed as motors for engine parts of marine propulsion devices in order to obtain higher-power marine propulsion devices.

  These marine propulsion devices have a structure in which the propeller and the superconducting motor are directly connected as described above.

  However, in the marine vessel propulsion apparatus, the propeller rotates at high speed outside the ship, so that the propeller or the like may be damaged by contact with an obstacle.

  When the engine unit (electric motor, diesel engine) and the outdoor unit are directly connected as in the prior art, when the propeller comes into contact with an obstacle, water enters the engine unit through the seal portion of the propeller rotating shaft.

  In particular, when a superconducting motor is used in the motor of the engine unit of the marine propulsion device, the superconducting motor cannot maintain its function due to the ingress of water. There is.

  Therefore, one problem to be solved by the present invention is that the superconducting motor can maintain its function even if a propeller that is likely to contact an obstacle is damaged by contact with the obstacle. The object is to provide a marine propulsion device.

  The conventional electromagnetic clutch disclosed in Japanese Utility Model Publication No. 6-45358 is used for power transmission between the atmosphere side and the gas side of the gas laser device. It does not have the problem of maintaining the function of the superconducting motor with respect to the approach and means for solving it. In addition, conventionally, when an electromagnetic clutch is used under conditions of low speed and high torque, the size is increased, so that the electromagnetic clutch has not been used in the marine propulsion device.

  The conventional electromagnetic clutch disclosed in Japanese Utility Model Laid-Open No. 6-45358 is an electromagnetic coupling in a normal conducting state.

  It is known that if a superconducting field is used, a large torque can be transmitted with a stronger magnetic force and the size and size can be reduced.

  However, in order to maintain the superconducting state, it is necessary to maintain a very low temperature at which the superconducting state can be realized, and it is technically difficult to realize an electromagnetic clutch using a superconducting field because the structure is complicated. there were.

  However, the superconducting motor has a cooling device, a heat insulating structure and the like for maintaining the superconducting field in a superconducting state.

  If this superconducting motor cooling device, heat insulating structure, etc. can be used, a superconducting magnetic clutch capable of transmitting a large amount of power with a reasonable structure can be realized.

  Therefore, another problem to be solved by the present invention is that a superconducting motor clutch is used for a superconducting magnetic clutch, which has a complicated structure and is technically difficult. Is to provide a superconducting magnetic clutch capable of transmitting

  Furthermore, since the conventional marine propulsion device directly connects the propeller and the superconducting motor, the rotation speed of the propeller is controlled by the rotation speed control of the superconducting motor.

  According to the research of the present inventors, it is foreseen that the superconducting motor can improve the output efficiency in the low rotation and large torque region. However, the rotational speed required for the propeller is generally in a high rotational speed region as compared with a low rotational speed at which the merit (high output efficiency) of the superconducting motor can be obtained.

  Therefore, if the propeller and the superconducting motor are directly connected, and the control of the rotation speed of the propeller is performed by the rotation speed control of the superconducting motor, the rotation speed of the superconducting motor is higher than the low rotation speed range where high output efficiency can be obtained. It will be operating at.

  Therefore, yet another problem to be solved by the present invention is to drive a superconducting motor in a low rotation region where high output efficiency can be obtained, and to drive a propeller even in a high rotation region necessary as a marine propulsion device. The object is to provide a marine vessel propulsion device.

The marine vessel propulsion device according to the present invention
In a marine propulsion device composed of a propeller propulsion device and a superconducting motor,
The superconducting motor includes a stator in which a superconducting or normal conducting armature is disposed in a cylindrical shape, a rotor in which a superconducting field is disposed inside the stator facing the armature of the stator, and the rotor An electromagnetic clutch field coil comprising a superconducting coil fixed to the end plate, and a superconducting motor side casing containing the stator, the rotor, and the electromagnetic clutch field coil in a watertight manner,
The propeller propulsion device has a plurality of permanent magnets disposed at positions facing the field coils for the electromagnetic clutch, and a rotating plate disposed substantially in parallel with a rotor end plate of the superconducting motor. A propeller rotating shaft connected to the rotating plate, a propeller connected to a tip end portion of the propeller rotating shaft, and a propeller side casing containing the rotating plate and a part of the propeller rotating shaft. It is characterized by.

The marine vessel propulsion device according to the present invention
In a marine propulsion device composed of a propeller propulsion device and a superconducting motor,
The superconducting motor includes a stator in which a superconducting or normal conducting armature is disposed on a stationary plate perpendicular to the rotation axis of the superconducting motor, and a rotor in which a superconducting field is disposed on a rotating plate parallel to the stator. A field coil for an electromagnetic clutch comprising a superconducting coil fixed to the end plate of the rotor, and a superconducting motor side casing that watertightly contains the stator, the rotor, and the field coil for the electromagnetic clutch. Have
The propeller propulsion device has a plurality of permanent magnets disposed at positions facing the field coils for the electromagnetic clutch, and a rotating plate disposed substantially in parallel with a rotor end plate of the superconducting motor. A propeller rotating shaft connected to the rotating plate, a propeller connected to a tip end portion of the propeller rotating shaft, and a propeller side casing containing the rotating plate and a part of the propeller rotating shaft. It is characterized by.

  By generating a static magnetic field and a rotating magnetic field in the electromagnetic clutch field coil, an inverter control unit that performs drive control of acceleration and deceleration by the electromagnetic clutch can be provided.

  It is preferable that the propeller propulsion device further includes a propeller side casing for watertightly containing a seal portion of the propeller rotation shaft, a propeller rotation shaft inside the seal portion, and the rotation plate.

  The propeller propulsion device and the superconducting motor can be accommodated in a pod disposed outside the hull.

  According to the present invention, a marine propulsion device is constituted by a propeller propulsion device and a superconducting motor, and the propeller propulsion device and the superconducting motor are separated. Power transmission between the superconducting motor and the propeller propulsion device is performed by an electromagnetic clutch. The propeller propulsion device is provided with a superconducting motor-side casing that watertightly includes the stator, the rotor, and the field coil for the electromagnetic clutch, and the superconducting motor includes the rotating plate and a part of the propeller rotating shaft. Propeller side casing is provided.

  With the above configuration, the superconducting motor has an independent structure physically separated from the propeller propulsion device.

  As a result, the superconducting motor is stored in a watertight manner by the superconducting motor-side casing even when the propeller comes into contact with an obstacle outside the ship during operation and a large force is applied to the seal portion of the propeller rotating shaft to cause water leakage. Therefore, the superconducting motor can continue to maintain its function.

  In particular, when the propeller rotary shaft has a seal portion, a propeller rotary shaft inside the seal portion, and a structure in which the rotary plate is enclosed in a watertight manner in the propeller side casing, water is only immersed in the propeller side casing. .

  In such a case, according to the present invention, it is possible to stop the ship, perform operations such as repair and replacement of the propeller, and resume the operation by the superconducting motor whose function is maintained.

  According to the present invention, it is possible to provide an inverter control unit that performs drive control of acceleration and deceleration by the electromagnetic clutch by generating a static magnetic field and a rotating magnetic field in the electromagnetic coil field coil.

  According to the present invention, by generating a rotating magnetic field in the electromagnetic clutch field coil by the inverter control unit, the propeller propulsion device-side rotating plate can be rotated at a higher speed than the rotor of the superconducting motor.

  Utilizing this, a static magnetic field is generated in the field coil for the electromagnetic clutch in the low rotation range where high output efficiency can be obtained, and the propeller and the superconducting motor are synchronized. By generating a rotating magnetic field in the field coil, the propeller can be rotated at a higher speed than the superconducting motor.

  As a result, it is possible to obtain a marine vessel propulsion device that can use the low-rotation region with high output efficiency of the superconducting motor and can drive the propeller in the high-rotation region necessary for navigation of the vessel.

  Next, embodiments of the marine vessel propulsion device according to the present invention will be described below.

  FIG. 1 shows a marine propulsion device according to an embodiment of the present invention.

  The marine vessel propulsion device 1 according to the present embodiment is a so-called pod type propulsion device, and the entire marine vessel propulsion device 1 is accommodated in a cylindrical container (pod), and the pod is located outside the main body of the vessel. It is arranged.

  In the following description of the present embodiment, a pod type propulsion device will be described, but this does not limit the present invention to a pod type propulsion device. As will be apparent from the following description, the present invention is configured such that a marine propulsion device is composed of a propeller propulsion device and a superconducting motor, and the propeller propulsion device and the superconducting motor are physically separated to transmit power between them. Since it is performed by an electromagnetic clutch using a coil, it can be configured not only as a pod type propulsion device but also as a conventional marine propulsion device provided with a marine propulsion device in a ship.

  As shown in FIG. 1, the marine propulsion device 1 includes a propeller propulsion device 2 and a superconducting motor 3.

  The superconducting motor 3 is a so-called radial type synchronous machine, has a stator 4 in which a superconducting or normal conducting armature is arranged in a cylindrical shape, and is fixed so as to face the armature of the stator 4. A rotor 5 having a superconducting field disposed inside the child 4 is provided.

  In this embodiment, the superconducting field of the rotor 5 is formed by winding a superconducting coil 6 in a track shape, and is arranged on the cylindrical outer surface of the rotor 5 at equal intervals, as shown in FIG. Yes. In this embodiment, the superconducting field of the rotor 5 is a coil, but a bulk can be used. “Superconducting field” includes superconducting coils and superconducting bulk bodies.

  A rotor end plate 7 is provided on the propeller side of the rotor 5.

  The rotor end plate 7 is made of a superconducting coil, and electromagnetic coil field coils 8 that form one side of the electromagnetic clutch are provided at equal intervals in the circumferential direction.

  A coolant flow path is formed inside the rotor 5, and a cooling device 9 is connected to the end of the coolant flow path. The cooling device 9 cools the coolant, feeds it into the rotor 5, and cools the superconducting coil 6 to a temperature below the superconducting state. In the present embodiment, the cooling device 9 cools the coolant and feeds the coolant through the coolant flow path to cool the rotor, but the present invention is not limited to this, and the coolant Instead of having a flow passage, a solid heat transfer member is placed inside the rotor instead, and the heat transfer member is cooled by a cooling device so that the superconducting field of the rotor is cooled to the superconducting state. It can also be. The coolant may be liquid or gas. In the present embodiment, the coolant of the cooling device 9 is also fed to the electromagnetic clutch field coil 8 to cool the electromagnetic clutch field coil 8 to a temperature equal to or lower than the superconducting state.

  In the case where the stator 4 is a superconducting machine, a cooling device that supplies coolant to the stator 4 is also provided.

  The superconducting motor 3 includes a superconducting motor-side casing 10 that includes a stator 4, a rotor 5, and a field coil 8 for electromagnetic clutch.

  Superconducting motor side casing 10 has a watertight structure so that water cannot enter. More preferably, the inside of the superconducting motor-side casing 10 can be evacuated in order to minimize the ingress of heat.

  The propeller propulsion device 2 includes a rotating plate 11 that is disposed to face the rotor end plate 7 of the superconducting motor 3 so as to be substantially parallel thereto. A plurality of permanent magnets 12 are arranged on the rotating plate 11 so as to face the field coil 8 for electromagnetic clutch.

  The electromagnetic clutch includes a rotating plate 11, a permanent magnet 12, an electromagnetic clutch field coil 8, and a rotor end plate 7.

  The rotating plate 11 is fixed to the inner end portion of the propeller rotating shaft 13. A propeller 14 is fixed to the tip of the propeller rotating shaft 13.

  The propeller 14 has a hub 15 that is rotatably connected to the support structure 16.

  The propeller propulsion device 2 includes a propeller-side casing 17 that encloses the rotating plate 11, the permanent magnet 12 disposed thereon, and a part of the propeller rotating shaft.

  In the present embodiment, the propeller-side casing 17 includes a propeller rotary shaft seal 18, a propeller rotary shaft 13 on the inner side of the seal 18, a propeller rotary shaft support 19, the rotary plate 11, and the permanent magnet 12. It is configured to be watertight.

  Note that there may be a configuration in which only the superconducting motor side casing 10 is provided so as to enclose the superconducting motor 3 in a watertight manner, and the propeller side casing 17 does not have a watertight structure.

  Alternatively, as shown in FIG. 5, there may be a configuration in which only the superconducting motor side casing 10 is provided and the propeller side casing 17 is not provided so as to enclose the superconducting motor 3 in a watertight manner.

  Between the rotating plate 11 and the permanent magnet 12 and the electromagnetic clutch field coil 8 and the rotor end plate 7 forming the electromagnetic clutch, at least a partition wall of the superconducting motor side casing 10 exists.

  The marine vessel propulsion apparatus 1 according to the present embodiment further includes an inverter control unit 20 that generates a static magnetic field and a rotating magnetic field in the electromagnetic coil field coil 8 and performs drive control of acceleration and deceleration by the electromagnetic clutch. Yes.

  Now, the marine vessel propulsion apparatus 1 having the above-described configuration operates as follows and can provide the following effects.

  Prior to the operation, the marine propulsion device 1 activates the cooling device 9 and sufficiently cools the superconducting coil 6 of the rotor 5 and the field coil 8 for the electromagnetic clutch to a temperature equal to or lower than the temperature for realizing the superconducting state. To do.

  In the low rotation region, the inverter controller 20 controls the current so as to generate a static magnetic field in the electromagnetic clutch field coil 8.

  Here, the static magnetic field is a magnetic field that generates a fixed magnetic field for each electromagnetic clutch field coil 8 and does not change the magnetic pole. In other words, the magnetic field is relatively stationary with respect to the rotor end plate 7.

  By generating a static magnetic field in the electromagnetic clutch field coil 8, the permanent magnet 12 and the rotating plate 11 rotate at a low speed in synchronization with the rotation of the electromagnetic clutch field coil 8 and the rotor end plate 7. . In the low rotation range, the torque of the superconducting motor 3 is fully used.

  When the boat speed becomes high, the propeller 14 must be rotated in a high rotation region.

  In the high speed region, the inverter control unit 20 controls the current so as to generate a rotating magnetic field in the electromagnetic clutch field coil 8.

  Here, the rotating magnetic field is a magnetic field that is in the same direction as the rotation of the rotor end plate 7 and rotates at a higher speed than the rotation of the rotor end plate 7. In other words, the magnetic field rotates relative to the rotor end plate 7.

  By generating a rotating magnetic field in the electromagnetic clutch field coil 8, the permanent magnet 12 and the rotating plate 11 rotate at a higher speed than the electromagnetic clutch field coil 8 and the rotor end plate 7.

  According to the present invention, the propeller 14 can be rotationally driven according to the ship speed from low speed to high speed by the control of the inverter control unit 20 without requiring a special transmission.

  FIG. 4 is a graph comparing motor output efficiencies of various electric motors.

  In FIG. 4, the horizontal axis represents motor output (%), and the vertical axis represents motor output efficiency (%). In the graph of FIG. 4, the solid line is a superconducting field synchronous motor, the alternate long and short dash line is a permanent magnet field synchronous motor, the alternate long and two short dashes line is a winding type synchronous motor using a normal conducting coil field such as a copper wire, and the dotted line is each motor of an induction motor. The motor output efficiency (%) at the output (%) is shown.

  As indicated by the dotted line in FIG. 4, the superconducting field synchronous motor has a motor output efficiency that is lower than that of the permanent magnet field synchronous motor and the wound synchronous motor in a low rotation region where the motor output is about 30% or less. (%) Is significantly higher. In other words, by using a superconducting field synchronous motor in a low rotation range where the motor output is about 30% or less, the motor output efficiency is significantly higher than when using a permanent magnet field synchronous motor or a wound synchronous motor. Can be improved.

  According to the present invention, a static magnetic field is generated in the electromagnetic clutch field coil 8 at low speed to synchronize the rotation of the propeller and the superconducting motor, and a rotating magnetic field is generated in the electromagnetic clutch field coil 8 at high speed. By rotating the propeller at a higher speed than the superconducting motor, the high-efficiency ship propulsion can be performed by frequently using the low-rotation region of the high-power efficiency of the superconducting motor.

In addition, the advantage of the superconducting motor is that it has a small size and small size despite its low speed and large torque, but it can also be applied to the electromagnetic clutch of the present invention and has a large torque and low speed that did not exist in conventional products. Further, according to the present invention, the superconducting motor 3 is watertightly enclosed by the superconducting motor side casing 10, so that in the event of water leakage, The function of the superconducting motor 3 can be maintained.

  In the marine vessel propulsion device, the propeller 14 rotates at a high speed outside the boat, and thus may contact an obstacle.

  When the propeller 14 comes into contact with an obstacle, in a conventional marine propulsion device, a large force is applied to the seal portion of the propeller rotary shaft, water enters through the seal portion, and the superconducting motor is immersed in water. The function of the superconducting motor may be impaired and repair may be difficult.

  If the propeller propulsion unit and the superconducting motor are directly connected to each other as well as water, the propeller will contact the obstacle and the force will be transmitted directly to the superconducting motor, which may impair the function of the superconducting motor. is there.

  On the other hand, in the present invention, since the propeller propulsion device 2 and the superconducting motor 3 are physically separated, even when the propeller 14 comes into contact with an obstacle, a large force is not applied to the superconducting motor 3.

  Thereby, the superconducting motor 3 can be protected from a large physical force.

  In addition, according to the present invention, the superconducting motor 3 is stored in the superconducting motor side casing 10 in a watertight manner, so that even when water enters, the superconducting motor 3 can be protected from flooding.

  In particular, as in the present embodiment, the propeller-side casing 17 includes a propeller rotary shaft seal 18, a propeller rotary shaft 13 on the inner side of the ship from the seal 18, a propeller rotary shaft support 19, and the rotating plate 11. When the magnet 12 is enclosed in a watertight manner, the water is stored inside the propeller-side casing 17 even when water enters from the seal portion 18.

  According to the present invention, when the propeller comes into contact with an obstacle, the function of the superconducting motor is maintained, and the ship operation can be resumed by stopping the ship and performing repair and replacement work of the propeller.

  According to the present invention, a superconducting magnetic clutch capable of transmitting a large amount of power can be realized with a simple structure.

  In the present invention, the electromagnetic clutch field coil 8 is provided on the end plate 7 of the rotor including the superconducting coil 6. With this structure, the cooling device 9 for cooling the superconducting coil 6 of the rotor, the coolant channel provided in the rotor, the solid heat transfer member, the vacuum structure, etc. are shared or used, and one side of the electromagnetic clutch is It can be a superconducting coil. Thereby, it is not necessary to provide a dedicated cooling facility for the electromagnetic clutch field coil 8, and the superconducting coil can be used as a magnetic field of the electromagnetic clutch, and a small electromagnetic clutch capable of transmitting a large torque can be obtained.

  By using the electromagnetic clutch field coil 8 as a superconducting coil, it is possible to transmit a large amount of power as compared to a normal conductive machine or a permanent magnet. Furthermore, the power to be transmitted can be significantly reduced as compared with conventional products.

  FIG. 2 shows a structure of a pod type propulsion apparatus different from the embodiment shown in FIG.

  In the marine propulsion device 1 of FIG. 1, the hub 15 of the propeller 14 is supported by the rudder support structure 16, whereas the hub 15 of the propeller 14 of FIG. 2 is supported by another structure. It is not a structure. In FIG. 2, the same parts as those in FIG.

  The present invention can be applied to a conventional marine propulsion device which is not a pod type propulsion device, and can be applied to marine propulsion devices having various structures. FIG. Is shown.

  FIG. 3 shows a marine vessel propulsion apparatus according to the present invention in which a superconducting motor is a so-called axial type synchronous machine.

  In FIG. 3, the marine vessel propulsion device 21 includes a propeller propulsion device 22 and a superconducting motor 23.

  The superconducting motor 23 includes a stator 26 having a superconducting or normal conducting armature 25 disposed on a stationary plate 24 perpendicular to the rotation axis of the superconducting motor, and a superconducting field 28 disposed on a rotating plate 27 parallel to the stator 26. A rotor 29 is provided.

  The superconducting motor 23 has a field coil 31 for an electromagnetic clutch composed of a superconducting coil fixed to the end plate 30 of the rotor 29. Furthermore, the superconducting motor 23 has a superconducting motor-side casing 32 that encloses the stator 26, the rotor 29, and the electromagnetic coil field coil 31 in a watertight manner.

  On the other hand, the propeller propulsion device 22 includes a rotating plate 33 disposed substantially parallel to the rotor end plate 30 of the superconducting motor, a propeller rotating shaft 34 connected to the rotating plate 33, and a tip portion of the propeller rotating shaft 34. And a propeller 35 connected to the.

  The rotating plate 33 is provided with a plurality of permanent magnets 36 so as to face the electromagnetic clutch field coil 31.

  Further, the propeller propulsion device 22 has a propeller-side casing 37 that encloses the rotating plate 33 and a part of the propeller rotating shaft 34.

  The marine vessel propulsion device 21 has an inverter control unit 38.

  Other configurations of the present embodiment are the same as those of the embodiment of FIG.

  According to the present embodiment, the propeller propulsion device 22 and the superconducting motor 23 have independent structures, and when the propeller 35 comes into contact with an obstacle, the force is not directly applied to the superconducting motor 23, and the superconducting motor 23 is externally applied. The superconducting motor 23 can be protected from being flooded by the superconducting motor 23 being stored in a watertight manner by the superconducting motor side casing 32 when water enters. By using the structure, it is possible to realize a superconducting magnetic clutch with a simple structure. By generating a static magnetic field and a rotating magnetic field in the inverter control unit 38, a low rotation region of high motor output efficiency of the superconducting synchronous motor is utilized. The operational effects such as being able to obtain a highly efficient marine propulsion device are the same as in the embodiment of FIG.

  In addition, this embodiment has an axial structure, and has a small cross-sectional area with respect to the traveling direction by increasing the number of fixing plates 24 of the stator 26 and rotating plates 27 of the rotor 29. Meanwhile, the marine vessel propulsion device 21 having a large output can be obtained.

  In particular, in the case of a pod type propulsion device, since the cross-sectional area with respect to the traveling direction of the pod becomes the resistance of the pod, as described above, it is possible to provide a large output while having a small cross-sectional area with respect to the traveling direction. This is very preferable in terms of the performance of the propulsion device.

The schematic structure figure showing the structure of the vessel propulsion device by one embodiment of the present invention. The schematic structure figure which showed the modification of the structure of the ship propulsion apparatus by embodiment of FIG. 1 of this invention. The schematic structure figure showing the structure of the propulsion device for ships by other embodiments of the present invention. The graph which compared and showed the motor output efficiency in each motor output of various synchronous motors. The schematic structure figure which showed the structure of the propulsion apparatus for ships by the modification of embodiment of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ship propulsion apparatus 2 Propeller propulsion apparatus 3 Superconducting motor 4 Stator 5 Rotor 6 Superconducting coil 7 Rotor end plate 8 Electromagnetic clutch field coil 9 Cooling device 10 Superconducting motor side casing 11 Rotating plate 12 Permanent magnet 13 Propeller Rotating shaft 14 Propeller 15 Hub 16 Support structure 17 Propeller side casing 18 Sealing portion 19 Propeller rotating shaft support portion 20 Inverter control portion 21 Marine propulsion device 22 Propeller propulsion device 23 Superconducting motor 24 Fixed plate 25 Armature 26 Stator 27 Rotation Plate 28 Superconducting field 29 Rotor 30 End plate 31 Coil for field for electromagnetic clutch 32 Superconducting motor side casing 33 Rotating plate 34 Propeller rotating shaft 35 Propeller 36 Permanent magnet 37 Propeller side casing 38 Inverter controller

Claims (5)

In a marine propulsion device composed of a propeller propulsion device and a superconducting motor,
The superconducting motor includes a stator in which a superconducting or normal conducting armature is disposed in a cylindrical shape, a rotor in which a superconducting field is disposed inside the stator facing the armature of the stator, and the rotor An electromagnetic clutch field coil comprising a superconducting coil fixed to the end plate, and a superconducting motor side casing containing the stator, the rotor, and the electromagnetic clutch field coil in a watertight manner,
The propeller propulsion device has a plurality of permanent magnets disposed at positions facing the field coil for the electromagnetic clutch, and a rotation plate disposed substantially opposite to the rotor end plate of the superconducting motor. A marine propulsion device comprising: a propeller rotating shaft connected to the rotating plate; and a propeller connected to a tip end portion of the propeller rotating shaft. In a marine propulsion device composed of a propeller propulsion device and a superconducting motor,
The superconducting motor includes a stator in which a superconducting or normal conducting armature is disposed on a stationary plate perpendicular to the rotation axis of the superconducting motor, and a rotor in which a superconducting field is disposed on a rotating plate parallel to the stator. A field coil for an electromagnetic clutch comprising a superconducting coil fixed to the end plate of the rotor, and a superconducting motor side casing that watertightly contains the stator, the rotor, and the field coil for the electromagnetic clutch. Have
The propeller propulsion device has a plurality of permanent magnets disposed at positions facing the field coils for the electromagnetic clutch, and a rotating plate disposed substantially in parallel with a rotor end plate of the superconducting motor. A marine propulsion device comprising: a propeller rotating shaft connected to the rotating plate; and a propeller connected to a tip end portion of the propeller rotating shaft.   3. The inverter control unit according to claim 1, further comprising: an inverter control unit that controls acceleration and deceleration by an electromagnetic clutch by generating a static magnetic field and a rotating magnetic field in the electromagnetic coil field coil. The marine vessel propulsion device described.   The propeller propulsion device further includes a propeller side casing for watertightly containing a seal portion of a propeller rotation shaft, a propeller rotation shaft inside the seal portion, and the rotation plate. The marine vessel propulsion device according to any one of Items 1 to 3.   A pod-type marine propulsion device characterized in that the propeller propulsion device and the superconducting motor according to claims 1 to 4 are housed inside a pod disposed outside the hull.

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