JP2005224001A - Superconducting synchronous machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a superconducting synchronous machine which can efficiently cool the superconductor coil and which can utilize the strong magnetic force of the superconductor coil. <P>SOLUTION: The superconducting synchronous machine has a rotary plate 3 at a rotary shaft 2, a superconducting coil 4 fixed to the rotating plate 3, and armature coils 5 arranged at both sides of the rotary track of the superconducting coil 4 so as to mutually face each other at a predetermined interval in the circumferential direction. The rotating plate 3 holds the superconducting coil 4 so that the axial end face or the center axis of the windings of the superconducting coil 4 is exposed to the outside. The rotating plate 3 and the rotary shaft 2 have refrigerant passage 6 which communicate with the refrigerant source. The superconducting coil 4 has a part of its surface opened to the internal space of the refrigerant passage 6 of the rotating plate 3 or is brought into contact with the refrigerant passage 6 of the rotating plate 3 via a partition wall 37. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an axial gap type superconducting synchronous machine using a superconducting coil made of a superconductor. In particular, the present invention relates to a high-power superconducting synchronous machine capable of improving the cooling efficiency of a superconducting coil and reducing the axial gap.

  The present invention also relates to a marine pod propulsion unit that uses the superconducting synchronous machine and has a small cross-sectional area with respect to the propulsion direction and a large propulsive force.

  Conventionally, there has been an axial gap type superconducting synchronous machine using a bulk superconductor on the stator side.

  For example, in Japanese Patent Application Laid-Open Nos. 7-87724 and 7-87724, field magnet portions are provided on both axial sides of a rotating shaft of a rotary armature, and a bulk superconductor and its surroundings are provided in the magnet portion. A device using a coil wound around is disclosed.

  The magnet part is held in a liquid helium container, and a part of the peripheral surface and the bottom surface are open to the internal space of the liquid helium container.

  In this conventional superconducting synchronous machine, liquid helium is supplied to a liquid helium container, the bulk superconductor and its peripheral coil are cooled to an absolute temperature of 4.2 degrees, and the bulk superconductor transitions to the superconducting state before the coil. The bulk superconductor is magnetized by passing a current through it.

In such a state where the bulk superconductor is magnetized, a current is passed through the coil of the rotating armature through the brush, a rotating magnetic field is generated in the coil of the rotating armature, A rotational force is obtained by the action of force.
Japanese Patent No. 2822570 JP-A-7-87724

  The conventional superconducting synchronous machine can use its strong magnetic force by using a bulk superconductor, but since the bulk superconductor is used on the stator side of the synchronous machine, of the two magnetic poles of the bulk superconductor, Only the magnetic flux from one magnetic pole facing the rotating armature could be used for driving and power generation.

  Accordingly, one of the problems to be solved by the present invention is to provide a superconducting synchronous machine that can use magnetic fluxes from both magnetic poles of a bulk superconductor.

  A bulk superconductor generates a stronger magnetic force than a permanent magnet when magnetized, but has a lower magnetic force than when a current is passed through a superconducting coil.

  In addition, bulk superconductors have a limit in the number of magnetic fluxes that emerge from the magnetic pole surface because it is difficult to obtain a large crystal in terms of manufacturing technology.

  On the other hand, since the superconducting coil is formed by winding a superconducting wire, the cross-sectional area with respect to the axial direction of the winding central axis (hereinafter referred to as “winding axis direction”) can be increased. Thus, according to the superconducting coil formed with a large cross-sectional area with respect to the winding axis direction, not only the magnetic flux density is high, but also the magnetic pole surface is large, so the number of magnetic fluxes is large and a very advantageous superconducting coil is formed. be able to.

  Therefore, another problem to be solved by the present invention is to provide a superconducting synchronous machine that advantageously uses a superconducting coil.

  In response to the above problems, the inventors of the present invention have devised an axial gap type superconducting synchronous machine having a structure in which a superconducting coil is used on the rotor side and armatures are arranged on both sides of the end surface in the winding axis direction of the superconducting coil. .

  According to this configuration, both end surfaces of the superconducting coil in the winding axis direction can face the armature coil, and the magnetic flux emitted from both magnetic poles of the superconducting coil interacts with the armature coil and is used for driving or power generation. The

  However, in the superconducting synchronous machine with the above structure, the superconducting coil is cooled to a temperature lower than the critical temperature at which it is transferred to the superconducting state, and the superconducting state is maintained. A structure must be provided for constantly supplying refrigerant to the coil.

  Therefore, another problem to be solved by the present invention is to provide a superconducting synchronous machine that can efficiently cool a superconducting coil and can efficiently use the magnetic flux of the superconducting coil.

  Furthermore, the present invention relates to a marine pod propulsion device using the superconducting synchronous machine of the present invention.

  Conventionally, a radial gap marine pod propulsion machine has been proposed in which a bulk superconductor is fixed to the outer peripheral surface of a cylindrical rotor and a cylindrical armature coil coaxial with the rotor is disposed on the outer periphery thereof.

  A radial gap type marine pod propulsion machine generates a force between a bulk superconductor provided on the outer periphery of the rotor and an armature coil provided on the outer periphery of the rotor. Therefore, there is an advantage that the rotational torque is large.

  However, the radial gap type marine pod propulsion unit increases the rotor radius and increases the distance from the point of action of the force to the rotation axis when trying to obtain a large rotational torque by the magnetic force of the same bulk superconductor. Had to do.

  However, if the radius of the rotor is increased, the radius of the marine pod propulsion unit is increased, and the cross-sectional area of the marine pod propulsion unit with respect to the propulsion direction is increased, resulting in an increase in propulsion resistance. For this reason, there was a limit to increasing the output in the radial gap type marine pod propulsion device.

  Accordingly, still another problem to be solved by the present invention is to provide a marine pod propulsion device having a small propulsion resistance and a large propulsive force.

  In the superconducting synchronous machine of the present invention, a rotating plate is provided on a rotating shaft, a superconducting coil is fixed to the rotating plate, and armature coils are arranged on both sides of the rotating track of the superconducting coil so as to face each other at a predetermined interval in the circumferential direction. In the disposed superconducting synchronous machine, the rotating plate holds the superconducting coil so that the axial end surface of the winding central axis of the superconducting coil is exposed to the outside, and the rotating plate and the rotating shaft serve as a refrigerant source. The superconducting coil has a communicating refrigerant flow path, and a part of the surface of the superconducting coil is opened to an internal space of the refrigerant flow path of the rotating plate, or is in contact with the refrigerant flow path of the rotating plate through a partition wall. It is characterized by that.

  The superconducting coil is preferably wound in substantially the same shape as the front surface of the armature coil.

  The superconducting coil and the armature coil are preferably wound so that the front shape is a fan shape.

  The rotating shaft is composed of a double or more multiple tube forming a refrigerant supply side and a recovery side flow path, and the supply side refrigerant flow path of the rotating shaft communicates with the refrigerant flow path of the rotating plate, and the superconducting The outer circumferential surface of the coil winding can be circulated to communicate with the recovery-side refrigerant flow path of the rotating shaft.

  In the superconducting synchronous machine according to the present invention, a rotating plate is provided on a rotating shaft, a superconducting coil is fixed to the rotating plate, and armature coils are arranged on both sides of the rotating track of the superconducting coil so as to face each other at a predetermined interval in the circumferential direction. In the arranged superconducting synchronous machine, the rotating plate has a hollow portion, and the hollow portion has the superconducting coil disposed therein so that an axial end surface of a winding central axis of the superconducting coil is parallel to the rotating shaft. The rotating shaft has a refrigerant flow path communicating with a refrigerant source, the refrigerant flow path of the rotating shaft communicates with a cavity of the rotating plate, and the outer surface of the superconducting coil is connected to a fixing member. Except for the contact portion, it is open to the space in the cavity.

The rotating shaft is composed of a double or more multiple tube forming a refrigerant supply side and a recovery side flow path, and the supply side refrigerant flow path of the rotating shaft communicates with a cavity of the rotating plate, and the rotating plate The cavity portion can communicate with the recovery-side refrigerant flow path of the rotating shaft.
The armature coil is held by a refrigerant container, and the armature coil has an outer surface excluding a surface facing the superconducting coil and an outer surface held by the refrigerant container open to an internal space of the refrigerant container, or a partition. It can be in contact with the space in the refrigerant container through a wall.

  A housing including at least a part of the rotating shaft, a rotating plate, an armature, and a refrigerant container for the armature, wherein the housing includes a decompression duct or a decompression nozzle that connects an internal space of the housing and a vacuum device; Can be.

  The housing may constitute a vacuum chamber and an explosion-proof chamber.

  A plurality of the rotating plates may be fixed on the rotating shaft, and the armature coils may be provided between adjacent rotating plates and outside both ends in the row direction of the rotating plates.

  An additional housing containing the rotating shaft protruding from the housing is attached to the housing, a decompression duct or a decompression nozzle communicating with a vacuum device is provided in the additional housing, and a refrigerant pipe communicating with a refrigerant source is inserted into the additional housing. A support having a flow path that is fixed and supports the end of the rotating shaft in a non-contact state with the additional housing at the insertion end of the refrigerant pipe and communicates with the refrigerant flow path of the rotating shaft and the refrigerant pipe. The member can be fixed.

  In the marine pod propulsion apparatus according to the present invention, a plurality of rotating plates are provided at predetermined intervals on a rotating shaft, a superconducting coil is fixed to the rotating plate, and the superconducting coils are disposed between the rotating plates and outside both ends in the row direction of the rotating plates. The armature coils are arranged at predetermined intervals in the circumferential direction in the vicinity of the rotation track of the coil, and the rotating plate holds the superconducting coil so that the axial end surface of the winding central axis of the superconducting coil is exposed to the outside. The rotary plate and the rotary shaft have a refrigerant flow path communicating with a refrigerant source, and a part of the surface of the superconducting coil is opened to an internal space of the refrigerant flow path of the rotary plate, or through a partition wall. A pod that is in contact with the refrigerant flow path of the rotating plate and includes the armature coil, the rotating plate, and a part of the rotating shaft, one end portion of the rotating shaft protruding from the pod and a propeller at the tip portion Also characterized by having It is.

In the marine pod propulsion device according to the present invention, a plurality of rotating plates are provided at predetermined intervals on a rotating shaft, a superconducting coil is fixed to the rotating plate, and the superconducting coils are arranged between the rotating plates and outside both ends in the row direction of the rotating plates. The armature coils are arranged at predetermined intervals in the circumferential direction in the vicinity of the rotation track of the coil, the rotating plate has a hollow portion, and the hollow portion has an axial end surface of the winding central axis of the superconducting coil. The superconducting coil is housed and fixed in the coil so as to be parallel to the rotary coil, the rotary shaft has a refrigerant flow path communicating with a refrigerant source, and the refrigerant flow path of the rotary shaft communicates with a cavity of the rotary plate. The outer surface of the superconducting coil is open to the space in the cavity except for the contact portion with the fixing member.
The armature, the rotating plate, and a pod that includes a part of the rotating shaft are included, and one end of the rotating shaft protrudes from the pod and has a propeller at the tip.

  According to one superconducting synchronous machine of the present invention, the superconducting coil is held by the rotating plate so that the end surface in the winding axis direction is exposed to the outside. As a result, the distance between the end surface in the winding axis direction of the superconducting coil and the armature coil can be made as small as possible. As a result, a strong force acts between the superconducting coil and the armature coil, resulting in a strong rotational force or induction. An electromotive force can be generated.

Moreover, the present invention can generate a magnetic force stronger than that of the bulk superconductor by using the superconducting coil. Furthermore, by using a superconducting coil, the area of the cross section perpendicular to the winding axis direction can be increased, and the area of the magnetic pole can be increased. Therefore, a superconducting synchronous machine that generates a strong rotational force or induced electromotive force can be obtained by a synergistic effect of a high magnetic flux density and a wide magnetic pole surface area. According to one superconducting synchronous machine of the present invention, a superconducting coil can be rotated. The plate is accommodated and fixed in the cavity of the plate, and the refrigerant flow path is communicated with the cavity. The outer surface of the superconducting coil is open to the space in the cavity except for the contact portion with the fixing member.

  According to the present invention, since the outer surface of the superconducting coil is open to the space in the cavity except for the contact portion with the fixing member, almost all of the outer surface of the superconducting coil is cooled by the refrigerant, and the cooling efficiency is high. A superconducting synchronous machine can be obtained.

  According to the marine pod propulsion device of the present invention, a plurality of rotating plates can be arranged in the direction of the rotation axis, and a strong rotational force can be obtained in proportion to the number of the rotating plates. On the other hand, even if such an increase in rotational force is attempted, the increase in propulsion resistance is moderate because the radius of the rotating plate and thus the cross-sectional area with respect to the propulsion direction of the marine pod propulsion device does not increase. As a result, a marine pod propulsion device having a strong thrust and a low propulsion resistance can be obtained.

  Embodiments of the present invention will be described below.

  FIG. 1 shows a longitudinal section of a superconducting synchronous machine according to an embodiment of the present invention.

  In the superconducting synchronous machine 1 according to the present embodiment, a rotating plate 3 is provided on a rotating shaft 2, and a superconducting coil 4 is fixed on the rotating plate 3.

  Armature coils 5 are provided on both sides of the rotation track of the superconducting coil 4 so as to face each other at regular intervals in the circumferential direction.

  The rotating plate 3 has a refrigerant flow path 6 through which the refrigerant flows.

  The rotating shaft 2 is composed of multiple tubes, and has a supply-side refrigerant channel 7 and a recovery-side refrigerant channel 8 connected to a refrigerant source (not shown).

  The armature coil 5 is held by a refrigerant container 9. The refrigerant container 9 of the armature coil is connected to a refrigerant source (not shown) by refrigerant pipes 10 and 11.

  A part of the rotating shaft 2, the rotating plate 3 and the armature coil 5 are surrounded by a housing 12.

  The housing 12 has a decompression duct or decompression nozzle 13 that connects to a vacuum device (not shown). Moreover, the housing 12 of this embodiment has a window 14 through which the inside can be observed.

  Between the rotary shaft 2 and the housing 12, sleeves 15 and 16 having sufficient structural strength are inserted.

  The sleeves 15 and 16 have flanges at their inner ends, can be fixed to the rotating plate 3, and support the rotating shaft 2 and the rotating plate 3.

  Bearings 17 and 18 are interposed between the sleeves 15 and 16 and the housing 12, and seal materials 19 and 20 are interposed between the sleeves 15 and 16 and the rotary shaft 2.

  In the present embodiment, the additional housing 21 is attached to the side wall of the housing 12.

  The additional housing 21 is provided with a decompression duct or decompression nozzle 22 communicating with a vacuum device (not shown). A supply-side refrigerant pipe 23 and a recovery-side refrigerant pipe 24 that are in communication with the refrigerant source are inserted and fixed in the additional housing 21. A support member 25 is fixed to the insertion end portions of the supply side refrigerant pipe 23 and the recovery side refrigerant pipe 24 in a non-contact state with the additional housing 21. The support member 25 supports the end of the rotary shaft 2 so as to be rotatable. In addition, the support member 25 is provided with a refrigerant flow path 26 that allows the refrigerant flow paths 7 and 8 of the rotating shaft to communicate with the refrigerant pipes 23 and 24. The support member 25 can be configured by a plurality of members as appropriate, and in this embodiment, the support member 25 includes two members, an outer cylinder and an inner cylinder. Further, the support member 25 of the present embodiment is provided with drain pipes 27 and 28 for discharging refrigerant that may leak from the rotary support portion of the rotary shaft 2 and the support member 25 to the outside. The drain pipes 27 and 28 are inserted through the additional housing 21 and fixed, and support the support member 25 at their tips.

  In the superconducting synchronous machine 1 of the present embodiment, the refrigerant flows from the supply side refrigerant pipe 23 attached to the additional housing through the refrigerant flow path 7 on the supply side of the rotary shaft to the refrigerant flow path 6 of the rotary plate, and is thus superconductive. After the coil 4 is cooled, it flows into the refrigerant flow path 8 on the collection side of the rotating shaft, and returns to the refrigerant source through the collection side refrigerant pipe 24 of the additional housing.

  In addition, the refrigerant flows from the refrigerant source, which may be the same system or a different system, through the refrigerant pipes 10 and 11 to the internal space of the armature refrigerant container 9, cools the armature coil 5, and then returns to the refrigerant source. ing.

  The housing 12 is decompressed by a vacuum device from a decompression duct or a decompression nozzle 13, and the inside is in a vacuum state during operation.

  The additional housing 21 is also decompressed by the vacuum device from the decompression duct or the decompression nozzle 22, and the inside is in a vacuum state during operation.

  FIG. 2 shows the refrigerant flow path 6 inside the rotating plate 3 as viewed from the front.

  As shown in FIG. 2, the refrigerant flow path 6 of the rotating plate of the present embodiment is divided into both left and right systems, and the introduction part communicates with the refrigerant flow path 7 on the supply side of the rotating shaft 2, which is around the superconducting coil 4. Is made as much as possible to return to the refrigerant flow path 8 on the recovery side of the rotating shaft 2.

  The superconducting coil 4 is fitted into a hole provided in the rotating plate 3.

  FIG. 3 shows a perspective view of the refrigerant flow path 6 inside the rotating plate 3.

  As is clear from FIG. 3, the refrigerant flow path 6 of the rotating plate 3 is preferably a groove provided in the rotating plate 3. The rotating plate 3 has a flat cover that is not shown in FIG. 3, and the refrigerant flow path 6 is closed by forming the cover to form a flow path. The lid is also provided with a hole for exposing the end face of the superconducting coil 4, so that both end faces of the superconducting coil 4 are exposed to the outside of the rotating plate 3 even when the lid is covered.

  FIG. 4 shows the holding state of the superconducting coil 4.

  As shown in FIG. 4, in the present invention, the superconducting coil 4 is held so that the winding axis direction is parallel to the rotating shaft 2. The refrigerant flow path 6 is held on the outer peripheral side surface of the winding of the superconducting coil 4.

  According to the present embodiment, both end surfaces of the superconducting coil 4 in the winding axis direction are exposed to the outside of the rotating plate 3.

  With the above structure, according to the superconducting synchronous machine 1 of the present embodiment, both end surfaces in the winding axis direction of the superconducting coil 4 can be brought as close to the armature coil 5 as possible, and the axial gap can be made as small as possible. .

  In the cross-sectional view shown in FIG. 4, the superconducting coil 4 and the refrigerant flow path 6 are partitioned by a partition wall made of a member integral with the rotating plate 3. However, the present invention is not limited to this, and as shown in FIG. 5, the superconducting coil 4 and the refrigerant flow path 6 may be partitioned by a partition wall composed of the rotating plate 3 and the separate member 29.

  Further, although not shown, the superconducting coil 4 may have its circumferential side surface opened to the internal space of the refrigerant flow path 6 and directly cooled by the refrigerant.

  When the superconducting coil 4 and the refrigerant flow path 6 are partitioned by the separate member 29, high cooling efficiency can be obtained by using a metal having high heat conductivity for the partition wall.

  In FIG. 5, the superconducting coil 4 is composed of one superconducting coil 4, but a pair of superconducting coils 4 that are short in the winding axis direction can be disposed on both side surfaces of the rotating plate 3, respectively. In that case, a higher cooling effect can be obtained by allowing the refrigerant flow path 6 to flow between both the superconducting coils 4.

  In addition, the rotating shaft 2 can be made into a double tube or more. If the multiple pipes are double or more, it is possible to secure the refrigerant flow path of the rotating shaft for each refrigerant flow path 6 of the rotating plate 3, so that the refrigerant can flow more stably.

  Further, according to the present embodiment, the rotating shaft 2, the rotating plate 3, and the armature coil 5 are accommodated inside the housing 12 as a whole. As described above, the inside of the housing 12 is decompressed to a vacuum state. Thereby, the heat insulation excellent in the rotating shaft 2, the rotating plate 3, and the armature coil 5 can be exhibited. In addition, the housing 12 is preferably strong enough to serve as a vacuum chamber and an explosion-proof chamber. When the housing 12 also serves as an explosion-proof chamber, even if an abnormal situation occurs in which a large amount of refrigerant leaks and rapidly evaporates, explosion can be prevented and a safe superconducting synchronous machine can be obtained.

  The additional housing 21 of the present embodiment can contribute to the heat insulation of the rotating shaft 2 at the portion protruding from the housing 12 by being decompressed to a vacuum. Further, the additional housing 21 has an effect of preventing the end of the rotating shaft 2 from shaking.

  That is, the base of the additional housing 21 is fixed to the housing 12 and supports the support member 25 via the supply side refrigerant pipe 23 and the recovery side refrigerant pipe 24 (preferably the drain pipes 27 and 28 also support the support member 25. Support it). Since the support member 25 grips the end portion of the rotating shaft 2 in a rotatable manner, the end of the rotating shaft 2 is effectively prevented from swinging. Furthermore, since the entire rotating shaft 2 is insulated by the vacuum layer, a superconducting synchronous machine with extremely high cooling efficiency can be obtained.

  1 to 5 show the superconducting coil 4 wound in a circular or annular shape. However, the superconductor coil 4 of the present invention is not limited to a circular shape or an annular shape. In the present invention, it is preferable to increase the number of turns of the superconducting coil and increase the area of the cross section with respect to the winding axis direction. Moreover, as shown in FIG. 6, it is preferable to make it the front substantially the same shape as the armature coil 5. In particular, the superconductor coil 4 is wound so that the front shape is a fan shape as shown in FIG. 6 so as to cover the entire surface of the rotating plate 3, so that it can interact with the armature coil 5 without any gap. A high-power superconducting synchronous machine can be obtained.

  Next, a second embodiment of the present invention will be described. In this embodiment, the entire superconducting coil is housed in a rotating plate, and the superconducting coil is cooled from the entire peripheral surface of the superconducting coil.

  FIG. 7 is a front view of a rotating plate according to the second embodiment of the present invention.

  In addition, about the same part as FIGS. 1-6, it shows using the same code | symbol.

  As shown in FIG. 7, the rotating plate 30 of this embodiment has a relatively large cavity 31 inside. The cavity portion 31 illustrated in FIG. 7 has an annular shape, but the shape of the cavity portion is not limited to the annular shape.

  In the present embodiment, eight superconducting coils 4 are housed and fixed in the annular cavity 31 in the circumferential direction.

  Similar to the first embodiment, the superconducting coil 4 is arranged so that the winding axis direction is parallel to the rotating shaft 2.

  The superconducting coil 4 is fixed to the casing of the rotating plate 30 by a fixing member 32.

  Four supply pipes 33 are provided radially from the refrigerant flow path 7 on the supply side of the rotary shaft 2. Further, four recovery pipes 34 communicate with the refrigerant flow path 8 on the recovery side of the rotary shaft 2 from the cavity 31. Note that the lengths of the supply pipe 33 and the recovery pipe 34 may be opposite to those shown in FIG. Further, the number of supply pipes 33 and recovery pipes 34 is not limited to that shown in FIG.

  FIG. 8 is a cross-sectional view showing a housed and fixed state of the superconducting coil 4 of the second embodiment.

  The rotating plate 30 has a hollow portion 31 therein, and the superconducting coil 4 is fixed to the casing of the rotating plate 30 by a fixing member 32 and is accommodated in the hollow portion 31. The end surface in the winding axis direction of the superconducting coil 4 is slightly separated from the casing of the rotating plate 30, and the end surface can be cooled by the refrigerant.

  Further, as shown in FIG. 8, a casing 35 can be further provided outside the rotating plate 30. The casing 35 can cover the outer surface of the rotating plate 30 and make the inside vacuum. Thereby, the outer surface of the rotating plate 30 is covered with the vacuum chamber 36, and high cooling efficiency can be obtained by a high heat insulating effect.

  The casing 35 is useful when a housing that encloses the entire armature, the rotating plate, and the rotating shaft cannot be provided.

  As is apparent from FIGS. 7 and 8, according to the second embodiment, the outer surface of the superconducting coil 4 except for the fixing member 32 is in direct contact with the refrigerant, and high cooling efficiency can be obtained.

  In addition, the rotating plate 30 can be individually insulated by the casing 35.

  FIG. 9 shows a modification of the cooling chamber of the armature coil 5. The same parts as those in FIG. 1 are denoted by the same reference numerals.

  In the example of FIG. 1, a part of the surface of the armature coil 5 is directly opened to the internal space of the refrigerant container 9, but in the example of FIG. 9, the internal space of the armature coil 5 and the refrigerant container 9 is a partition wall 37. It is partitioned by.

  Thereby, it is possible to completely prevent the refrigerant inside the refrigerant container 9 from leaking outside through the armature. Moreover, a high cooling effect is achieved by increasing the contact area with the armature coil 5.

  Thus, by cooling the armature coil 5 to a low temperature, the electric resistance of the armature coil 5 is reduced, and a strong magnetizing current and a rotating magnetic field can be generated.

  FIG. 10 conceptually shows a modification of the present invention and a marine pod propulsion machine to which the modification is applied.

  Each of the superconducting synchronous machines according to the first and second embodiments of the present invention can have a series structure as shown in FIG.

  The marine pod propulsion device according to the present invention stores a superconducting synchronous machine in which a plurality of rotating plates and armatures are arranged in series in the pod of the marine pod propulsion device, and propulsion of a propeller or the like at the tip of a rotating shaft protruding from the pod. Means are provided. In this case, a pod can be used instead of the housing 12 described above.

  By using a series structure as shown in FIG. 10, all the superconducting coils 4 arranged between the armatures use the magnetic flux from both magnetic poles without waste.

  Further, by making the superconducting synchronous machine according to the present invention in a series structure, it is possible to obtain a marine pod propulsion machine with low propulsion resistance and strong propulsion.

  That is, the conventional marine pod propulsion unit has a bulk superconductor arranged on the circumferential surface of the cylindrical rotor and a cylindrical shape on the outer side in order to obtain a strong torque by supplementing the magnetic field of the bulk superconductor which has been limited. A radial gap superconducting synchronous machine with an armature was used. According to the radial gap type superconducting synchronous machine, a bulk superconductor having a large area can be used, and an action of a force with an armature can be generated at a distance from the rotating shaft.

  However, the fact that the force acts with the armature at a distance from the rotating shaft can provide a strong torque, but also causes an increase in the outer diameter of the marine pod propulsion device, which increases the propulsion resistance.

  On the other hand, the marine pod propulsion unit using the radial gap type superconducting synchronous machine having the structure of FIG. 10 has a proportionally larger output if the number of rotors and armatures is increased. Since the outer diameter of the marine pod propulsion unit does not change, the increase in propulsion resistance is moderate.

  Thus, according to the marine pod propulsion device of the present invention, a marine pod propulsion device having a small propulsion resistance and a strong propulsive force can be obtained.

1 is a longitudinal sectional view of a superconducting synchronous machine according to an embodiment of the present invention. The front view of the rotating plate by one Embodiment of this invention. The perspective view of the rotating plate by one Embodiment of this invention. The longitudinal cross-sectional view of the periphery of the superconducting coil by one Embodiment of this invention. The longitudinal cross-sectional view of the modification of one Embodiment of this invention. The front view of the rotating plate by one Embodiment of this invention. The front view of the rotating plate by 2nd embodiment of this invention. The longitudinal cross-sectional view of the periphery of the superconducting coil by 2nd embodiment of this invention. The longitudinal cross-sectional view which shows the modification of the structure of the periphery of the armature coil of this invention. 1 is a schematic cross-sectional view of a marine pod propulsion device according to the present invention in which a rotating plate and an armature are in series.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Superconducting synchronous machine 2 Rotating shaft 3 Rotating plate 4 Superconducting coil 5 Armature coil 6 Refrigerant flow path of rotating plate 7 Refrigerant flow path on supply side of rotating shaft 8 Refrigerant flow path on collecting side of rotating shaft 9 Refrigerant container of armature DESCRIPTION OF SYMBOLS 10 Refrigerant piping 11 Refrigerant piping 12 Housing 13 Pressure reduction duct or pressure reduction nozzle 14 Window 15 Sleeve 16 Sleeve 17 Bearing 18 Bearing 19 Sealing material 20 Sealing material 21 Additional housing 22 Pressure reduction duct or pressure reduction nozzle 23 Supply side refrigerant piping 24 Recovery side refrigerant piping 25 Support member 26 Refrigerant flow path 27 Drain pipe 28 Drain pipe 29 Partition wall 30 Rotating plate 31 Cavity 32 Fixing member 33 Supply pipe 34 Recovery pipe 35 Casing 36 Vacuum chamber 37 Partition wall

Claims (13)

In a superconducting synchronous machine in which a rotating plate is provided on a rotating shaft, a superconducting coil is fixed to the rotating plate, and armature coils are arranged so as to face each other at predetermined intervals in the circumferential direction on both sides of the rotating track of the superconducting coil.
The rotating plate holds the superconducting coil such that the axial end surface of the winding central axis of the superconducting coil is exposed to the outside.
The rotating plate and the rotating shaft have a refrigerant flow path communicating with a refrigerant source,
The superconducting coil is characterized in that a part of the surface of the superconducting coil is open to the internal space of the refrigerant flow path of the rotating plate, or is in contact with the refrigerant flow path of the rotating plate through a partition wall. Machine.   The superconducting synchronous machine according to claim 1, wherein the superconducting coil is wound in substantially the same shape as the front surface of the armature coil.   2. The superconducting synchronous machine according to claim 1, wherein the superconducting coil and the armature coil are wound so that the front shape is a fan shape. 3. The rotating shaft is composed of two or more multiple tubes forming a refrigerant supply side and a recovery side flow path,
The supply-side refrigerant flow path of the rotating shaft communicates with the refrigerant flow path of the rotating plate, circulates around the outer peripheral surface of the winding of the superconducting coil, and communicates with the recovery-side refrigerant flow path of the rotating shaft. The superconducting synchronous machine according to claim 1. In a superconducting synchronous machine in which a rotating plate is provided on a rotating shaft, a superconducting coil is fixed to the rotating plate, and armature coils are arranged so as to face each other at predetermined intervals in the circumferential direction on both sides of the rotating track of the superconducting coil.
The rotating plate has a hollow portion, and the hollow portion accommodates and fixes the superconducting coil therein so that an axial end surface of a winding central axis of the superconducting coil is parallel to the rotating shaft,
The rotating shaft has a refrigerant flow path communicating with a refrigerant source;
The refrigerant flow path of the rotating shaft communicates with the cavity of the rotating plate, and the outer surface of the superconducting coil is open to the space in the cavity except for the contact portion with the fixing member. Superconducting synchronous machine. The rotating shaft is composed of two or more multiple tubes forming a refrigerant supply side and a recovery side flow path,
The supply-side refrigerant flow path of the rotary shaft communicates with a cavity portion of the rotary plate, and the cavity portion of the rotary plate communicates with a recovery-side refrigerant flow channel of the rotary shaft. Superconducting synchronous machine.   The armature coil is held by a refrigerant container, and the armature coil has an outer surface excluding a surface facing the superconducting coil and an outer surface held by the refrigerant container open to an internal space of the refrigerant container, or a partition. The superconductor synchronous machine according to any one of claims 1 to 6, wherein the superconductor synchronous machine is in contact with a space in the refrigerant container through a wall. A housing containing at least a part of the rotating shaft, a rotating plate, an armature, and a refrigerant container of the armature;
The superconducting synchronous machine according to claim 7, wherein the housing has a decompression duct or a decompression nozzle that connects an internal space of the housing and a vacuum device.   The superconducting synchronous machine according to claim 8, wherein the housing constitutes a vacuum chamber and an explosion-proof chamber.   The plurality of rotating plates are fixed on the rotating shaft, and the armature coils are provided between adjacent rotating plates and outside both ends in the row direction of the rotating plates. The superconducting synchronous machine according to one item.   An additional housing containing the rotating shaft protruding from the housing is attached to the housing, a pressure reducing duct or a pressure reducing nozzle communicating with a vacuum device is provided in the additional housing, and a refrigerant pipe communicating with a refrigerant source is inserted into the additional housing. A support having a flow path that is fixed and supported at an insertion end of the refrigerant pipe in a state where the end of the rotary shaft is not in contact with the additional housing and communicates with the refrigerant flow path of the rotary shaft and the refrigerant pipe. The superconducting synchronous machine according to claim 8, wherein the member is fixed. A plurality of rotating plates are provided at a predetermined interval on the rotating shaft, a superconducting coil is fixed to the rotating plate, and in the circumferential direction between the rotating plates and outside both ends in the row direction of the rotating plates in the vicinity of the rotating track of the superconducting coils. Armature coils are arranged at predetermined intervals,
The rotating plate holds the superconducting coil such that the axial end surface of the winding central axis of the superconducting coil is exposed to the outside.
The rotating plate and the rotating shaft have a refrigerant flow path communicating with a refrigerant source,
A part of the surface of the superconducting coil is opened to the internal space of the refrigerant flow path of the rotating plate, or is in contact with the refrigerant flow path of the rotating plate via a partition wall,
A pod containing the armature coil, the rotating plate, and a part of the rotating shaft;
One end of the rotating shaft protrudes from the pod and has a propeller at the tip. A plurality of rotating plates are provided at a predetermined interval on the rotating shaft, a superconducting coil is fixed to the rotating plate, and in the circumferential direction between the rotating plates and outside both ends in the row direction of the rotating plates in the vicinity of the rotating track of the superconducting coils. Armature coils are arranged at predetermined intervals,
The rotating plate has a hollow portion, and the hollow portion accommodates and fixes the superconducting coil therein so that an axial end surface of a winding central axis of the superconducting coil is parallel to the rotating shaft,
The rotating shaft has a refrigerant flow path communicating with a refrigerant source;
The refrigerant flow path of the rotating shaft communicates with the cavity portion of the rotating plate, and the outer surface of the superconducting coil is open to the space in the cavity portion except for the contact portion with the fixed member,
A pod containing the armature, the rotating plate, and a part of the rotating shaft;
One end of the rotating shaft protrudes from the pod and has a propeller at the tip.

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