Generator for marine vessel, method for mounting generator for marine vessel, and method for transporting generator for marine vessel

Abstract

To provide a new generator for marine vessel.SOLUTION: The generator for marine vessel includes a stator and a rotor, and is mounted to an engine. The stator includes: a stator mounting portion mounted to the engine; and a stator coil. The rotor includes: a bottom portion mounted to the engine; a frame portion having a toroidal columnar shape centered on a shaft center portion of a rotary shaft that rotates the rotor; and a permanent magnet mounted to the frame portion. The generator generates electricity by rotating the rotor in response to the rotation of the engine.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a marine generator, a method for installing a marine generator, and a method for transporting a marine generator. [Background technology]

[0002] In a ship, an engine provides power to a shaft, and the rotation of the shaft drives a propeller. A generator that generates electricity by utilizing the rotation of the shaft that drives the propeller is called a shaft power generator. For example, a shaft power generator installed between the engine and the propeller has been disclosed (see Patent Document 1). The shaft power generator of the ship in Patent Document 1 is connected to the main shaft between the ship's main engine and the ship's propeller. This type of shaft power generator is called an intermediate shaft type shaft power generator.

[0003] When a shaft power generating device is installed on the main shaft between the engine and the propeller, as in the shaft power generating device of Patent Document 1, it is necessary to secure space for installing the shaft power generating device between the engine and the propeller. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-60396 Summary of the Invention [Problem to be solved by the invention]

[0005] At least one object of the present invention is to provide a novel marine generator. [Means for solving the problem]

[0006] The object of the present invention is to [1] A marine generator comprising a stator and a rotor and attached to an engine, wherein the stator includes a stator attachment portion attached to the engine and a stator coil, and the rotor includes a bottom portion attached to the engine, a frame portion having a circular cylindrical shape centered on the axial center of a rotation shaft about which the rotor rotates, and a permanent magnet attached to the frame, and wherein the rotor rotates in response to the rotation of the engine to generate electricity; [2] The marine generator according to [1], wherein the stator includes a stator core having an annular shape centered on the shaft center, and the distance from the shaft center to the outer peripheral end of the stator core is 700 mm to 2000 mm; [3] The marine generator according to [1] or [2], wherein the stator includes a ring portion electrically connected to one or more of the stator coils, and the stator coil and the ring portion are connected by a connecting member having flexibility and electrical conductivity; [4] The marine generator according to any one of [1] to [3], wherein the stator includes a ring portion electrically connected to one or more of the stator coils and a conductive portion electrically connected thereto, and the ring portion and the conductive portion are connected by a connecting member having flexibility and electrical conductivity; [5] A marine generator according to any one of [1] to [4], wherein the stator includes a clamp extending radially toward the axial center, the rotor includes a liner attached to the frame and extending radially from the axial center, the end of the clamp extending toward the axial center has an arc shape centered on the axial center, and the end of the liner extending radially from the axial center has an arc shape centered on the axial center; [6] The marine generator according to [5], further comprising a spacer inserted between the clamp and the liner; [7] The marine generator according to any one of [1] to [6], wherein one or more holes are provided in the bottom portion; [8] The marine generator according to any one of [1] to [7], wherein the stator includes a rotor fixing portion for fixing the rotor, and the rotor includes a stator fixing portion for fixing the stator; [9] A marine generator according to any one of [1] to [8], comprising: a cooler unit attached to an upper portion of the stator and circulating and cooling gas; and a motor attached to an upper portion of the cooler unit for promoting intake of gas and discharge of cooled gas to the stator and the rotor;

[10] The marine generator according to [9], wherein the stator includes a stator cover portion provided with an opening through which gas can be taken in or exhausted from the outside, and a cover portion that covers the opening, and the cooler unit includes a cooler cover portion that is installed on the opening through which gas can be taken in or exhausted from the outside, and the cover portion and the cooler cover portion are removable;

[11] A method for mounting a marine generator having a stator and a rotor to an engine, wherein the stator includes a stator mounting portion mounted to the engine, a stator coil, and a clamp extending radially toward the axial center, and the rotor includes a bottom portion mounted to the engine, a frame portion having an annular cylindrical shape centered at the axial center of a rotating shaft about which the rotor rotates, a permanent magnet attached to the frame, and a liner attached to the frame and extending radially from the axial center, wherein the shape of the end of the clamp extending toward the axial center is an arc shape centered at the axial center, and the shape of the end of the liner extending radially is also an arc shape centered at the axial center, the method comprising: a measuring step of measuring a distance between the liner and the clamp while the stator and the rotor are temporarily fixed to the engine; and a fixing step of fixing the stator and the rotor to the engine based on the measurement result in the measuring step;

[12] A method for transporting a marine generator including a stator and a rotor, wherein the stator includes a stator mounting portion attached to the engine, a stator coil, and a clamp extending radially toward the axial center, and the rotor includes a bottom portion attached to the engine, a frame portion having an annular cylindrical shape centered on the axial center of a rotating shaft about which the rotor rotates, a permanent magnet attached to the frame, and a liner attached to the frame and extending radially from the axial center, wherein the end of the clamp extending toward the axial center has an arc shape centered on the axial center, and the end of the liner extending radially from the axial center has an arc shape centered on the axial center, the method comprising: an insertion step of inserting a spacer between the liner and the clamp; and a transportation step of transporting the marine generator after the insertion step;

[13] The transportation method according to

[12] , wherein the stator includes a stator fixing portion for fixing the rotor, the rotor includes a rotor fixing portion for fixing the stator, and the fixing step connects the stator fixing portion and the rotor fixing portion using a fixing member, and the transportation step transports the marine generator after the insertion step and the fixing step;

[14] A method for manufacturing a stator of a marine generator, the stator including a stator and a rotor and attached to an engine, the stator including a stator attachment portion attached to the engine, a stator core, and a stator coil at least a portion of which is housed in a slot provided in the stator core, the method comprising the steps of vacuum-impregnating the stator coil and housing the vacuum-impregnated stator coil in the slot provided in the stator core; This can be solved by: [Effects of the Invention]

[0007] According to the present invention, a novel marine generator can be provided. [Brief explanation of the drawings]

[0008] [Figure 1]1 is a schematic diagram of a mounting position of a generator according to an embodiment of the present invention; [Figure 2A] 1 is a perspective view showing, with some parts omitted, the configuration of a marine generator according to an embodiment of the present invention; [Figure 2B] 1 is a perspective view showing, with some parts omitted, the configuration of a marine generator according to an embodiment of the present invention; [Figure 3] 1 is a diagram showing the configuration of a stator and a rotor according to an embodiment of the present invention, with some parts omitted; [Figure 4] 1 is an enlarged perspective view showing a partial configuration of a stator and a rotor according to an embodiment of the present invention; [Figure 5] 1 is a schematic cross-sectional view showing a partial configuration of a stator and a rotor according to an embodiment of the present invention. [Figure 6] 2 is an enlarged perspective view showing a partial configuration of a stator according to an embodiment of the present invention; FIG. [Figure 7] 1 is a perspective cross-sectional view showing, with some parts omitted, the configuration of a marine generator according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments unless it is contrary to the spirit of the present invention. Furthermore, the description of the effects is one aspect of the effects of the embodiments of the present invention, and is not limited to those described here.

[0010] FIG. 1 is a schematic diagram of the mounting position of a marine generator according to an embodiment of the present invention. As shown in FIG. 1, the marine generator 1 according to the embodiment of the present invention is mounted to an engine 2. The engine 2 rotates a shaft 3 to drive a propeller 4. The propeller 4 is a thruster for propelling the marine vessel. The marine generator 1 is mounted on the opposite side of the engine 2 from the shaft 3 that drives the propeller 4. The marine generator 1 is a so-called overhung shaft power generating unit. The engine 2 rotates each mechanism of the marine generator 1. The engine 2 is, for example, a diesel engine or a gas turbine engine.

[0011] As shown in FIG. 1, the marine generator 1 includes a stator 100 and a rotor 200. The rotor 200 rotates in response to the rotation of the engine 2, causing the marine generator 1 to generate electricity. In this embodiment, the marine generator 1 is a generator used on a marine vessel. The marine generator 1 is, for example, a three-phase AC generator. The marine vessel is not particularly limited, and may be, for example, a large vessel, a medium-sized vessel, or a small vessel. The marine generator 1 is not limited to being used on a marine vessel, and may be any vessel that is attached to the engine 2 and generates electricity. For example, the marine generator 1 may be used in a vehicle or an aircraft. The marine generator 1 is a rotating electric machine.

[0012] In the following, the direction in which the rotation axis of the rotor 200 extends is defined as the longitudinal direction. The vertical direction refers to the vertical direction of the marine generator 1. The longitudinal direction is perpendicular to the vertical direction. The direction perpendicular to the longitudinal direction and the vertical direction is defined as the left-right direction. The left-right direction and the front-rear direction are defined for convenience of explanation. Therefore, the left-right direction and the front-rear direction do not have to coincide with the left-right direction and the front-rear direction when the marine generator 1 is in use. The left direction and the right direction may be interchanged, and the front direction and the rear direction may be interchanged. Furthermore, the center of the rotation axis about which the rotor 200 rotates is defined as the axial center Ax, and the direction in which the rotor 200 rotates is defined as the circumferential direction Dc. The direction away from the axial center Ax when viewed from the longitudinal direction is defined as the outer circumferential direction, and the direction approaching the axial center Ax when viewed from the longitudinal direction is defined as the inner circumferential direction. Furthermore, the direction perpendicular to the longitudinal direction and along the inner circumferential direction and the outer circumferential direction is defined as the radial direction Dd. In addition, in the radial direction Dd, the side closer to the axial center Ax is the inner peripheral side, and the side farther from the axial center Ax is the outer peripheral side.

[0013] In this specification, the term "a member extending upward" includes cases where the member is parallel to the upward direction and cases where the member is tilted relative to the upward direction, in which case the angle formed between the member and the upward direction is 40 degrees or less.

[0014] Fig. 2A is a perspective view showing, with some parts omitted, the configuration of a marine generator according to an embodiment of the present invention. Fig. 2B is a perspective view showing, with some parts omitted, the configuration of a marine generator according to an embodiment of the present invention. Fig. 3 is a view showing, with some parts omitted, the configuration of a stator and a rotor according to an embodiment of the present invention. Fig. 3 is a view of the clamp and rotor viewed from the front to the rear. Note that in Fig. 3, the stator frame is present outside the outer periphery of the clamp, but is omitted.

[0015] Fig. 4 is an enlarged perspective view showing a partial configuration of a stator and a rotor according to an embodiment of the present invention. Fig. 4 is an enlarged perspective view of region X shown in Fig. 2B. In Fig. 4, the liner and some of the permanent magnets are omitted. Fig. 5 is an enlarged cross-sectional view showing a partial configuration of a stator and a rotor according to an embodiment of the present invention. Fig. 5 is a cross-sectional view taken along line B-B in the perspective view shown in Fig. 3.

[0016] Each component of the marine generator 1 will be described below.

[0017] [stator] The stator 100 includes a stator mounting portion 110 , a stator coil 120 , a stator core 130 , a ring portion 140 , a conductive portion 150 , a clamp 160 , a rotor fixing portion 170 , a stator cover portion 180 , and a cover portion 184 .

[0018] The stator mounting portion 110 is attached to the engine 2. By attaching the stator mounting portion 110 to the engine 2, the stator 100 is attached to the engine 2. A plurality of holes are formed in the stator mounting portion 110. The stator 100 is attached to the engine 2 by utilizing the holes formed in the stator mounting portion 110 and holes formed in the engine 2.

[0019] The stator core 130 has an annular shape centered on the axial center Ax. The stator core 130 is made by laminating annular electromagnetic steel sheets centered on the axial center Ax in the front-to-rear direction. The stator core 130 has slots for accommodating the stator coils 120 (see FIGS. 2B and 4). The slots are grooves that extend in the front-to-rear direction and extend from the inner peripheral end of the stator core 130 toward the outer periphery. Note that FIG. 2B shows a portion of the annular stator core 130.

[0020] If the distance from the axial center Ax to the outer peripheral end of the stator core 130 is La, La is preferably 700 mm to 2000 mm, more preferably 800 mm to 1500 mm, and even more preferably 900 mm to 1100 mm. That is, La is preferably 700 mm or more, more preferably 800 mm or more, and even more preferably 900 mm or more. La is preferably 2000 mm or less, more preferably 1500 mm or less, and even more preferably 1100 mm or less. As shown in FIG. 3, the outer peripheral shape of the clamp 160 and the outer peripheral shape of the stator core 130 are the same.

[0021] 5, duct pieces 132 are installed between the stator cores 130 in the front-rear direction. The duct pieces 132 are rod-shaped members that are inclined with respect to the radial direction Dd. The duct pieces 132 form refrigerant ducts through which the cooling medium can circulate in the radial direction Dd.

[0022] The clamps 160 secure the stator core 130, which is made of electromagnetic steel plates laminated in the front-rear direction. The material of the clamps 160 is not particularly limited, but is preferably one that can be processed with high precision, such as iron or stainless steel. As shown in FIG. 5, the stator 100 includes clamps 160a and 160b. The clamp 160a is provided on the front surface of the stator core 130. The clamps 160a and 160b sandwich the stator core 130. Note that because the clamps 160a and 160b have the same shape, there is a case where the clamps 160a and 160b are not distinguished from each other and are referred to as clamps 160.

[0023] The clamp 160 extends in the radial direction Dd toward the axial center Ax. The clamp 160 has an annular shape centered at the axial center Ax. The clamp 160 may be formed by stacking annular members centered at the axial center Ax in the front-to-rear direction. The outer shape of the clamp 160 may match the outer shape of the stator core 130. The clamp 160 has slots for accommodating the stator coils 120. When viewed from the front to the rear, the slots in the clamp 160 and the slots in the stator core 130 have similar shapes (although they do not have to match completely) (see FIGS. 2B and 4). Furthermore, as shown in FIG. 3, when viewed from the front to the rear, the clamp 160 and the stator core 130 have similar shapes (although they do not have to match completely).

[0024] The thickness (Lb) of the clamp 160 in the front-rear direction is preferably 10 mm to 25 mm, and more preferably 15 mm to 20 mm. That is, Lb is preferably 10 mm or more, and more preferably 15 mm or more. Lb is preferably 25 mm or less, and more preferably 20 mm or less.

[0025] The shape of the inner peripheral end of the clamp 160 extending toward the axial center Ax is an arc centered at the axial center Ax. In addition, the distance from the outer peripheral end to the inner peripheral end of the clamp 160 in the radial direction Dd may be the same as or longer than the distance from the outer peripheral end to the inner peripheral end of the stator core 130.

[0026] The ring portion 140 is electrically connected to one or more stator coils 120. Fig. 6 is an enlarged perspective view showing a partial configuration of a stator according to an embodiment of the present invention. Fig. 6 is an enlarged perspective view of region Y shown in Fig. 2B, with the frame of the stator 100 seen through. In Fig. 6, the stator coils 120, the stator core 130, and the clamps 160 are omitted.

[0027] The ring portion 140 is an annular member for passing current generated in the stator coil 120 to the conductive portion 150. In the marine generator 1, current is generated in the stator coil 120 as the permanent magnets 230 included in the rotor 200 rotate. The conductive portion 150 is electrically connected to the ring portion 140. The stator coil 120 and the ring portion 140 are connected by a connecting member 400 that is flexible and conductive. As shown in FIG. 6 , the ring portion 140 and the conductive portion 150 are also connected by the connecting member 400 that is flexible and conductive.

[0028] The connecting member 400 includes terminals 402, 404 and a connecting portion 406. As shown in Fig. 6, the terminal 402 connects to the conductive portion 150, and the terminal 404 connects to the ring portion 140. The terminals 402 and 404 are connected by the connecting portion 406. The connecting portion 406 may be a conductor formed by weaving a plurality of thin metal wires, such as a flat braided copper wire formed by weaving thin copper wires in a flat pattern.

[0029] Because the connecting member 400 is flexible, when attaching the stator 100 to the engine 2, the connecting member 400 can be connected depending on the positions of the ring portion 140, the stator coil 120, and / or the conductive portion 150.

[0030] The rotor fixing portion 170 is a portion that fixes the rotor 200 to the stator 100. The rotor fixing portion 170 is provided on the stator cover portion 180 (see FIG. 2A). Eight rotor fixing portions 170 are provided along the circumferential direction Dc, on the inner peripheral side of openings 182, which will be described later. The rotor fixing portion 170 may be provided with a hole, or may have a nut attached thereto.

[0031] The stator cover part 180 is provided on the front surface of the stator 100 (see FIGS. 2A and 7). The stator cover part 180 covers the rotor 200 installed inside the stator 100. More specifically, the stator cover part 180 covers at least a portion of the bottom part 210 and the frame part 220. The stator cover part 180 includes a disk-shaped front surface and a cylindrical member extending rearward from the front surface. A hole may be provided in the center of the disk-shaped front surface.

[0032] The stator cover portion 180 is also provided with openings 182 that allow gas to be drawn in or exhausted from the outside. In FIG. 2A, eight openings 182 are provided along the circumferential direction Dc. As shown in FIG. 2A, the cover portion 184 covers the openings 182. The cover portion 184 is attached to the stator cover portion 180 with, for example, bolts and nuts. The cover portion 184 is removable. During normal operation of the marine generator 1, all of the openings 182 are covered with the cover portion 184.

[0033] [Rotor] The rotor 200 includes a bottom portion 210 , a frame portion 220 , a permanent magnet 230 , a liner 240 , and a stator stationary portion 260 .

[0034] The bottom portion 210 is attached to the engine 2. By attaching the bottom portion 210 to the engine 2, the rotor 200 is attached to the engine 2. The bottom portion 210 is provided with a plurality of holes 212 for attaching the rotor 200 to the engine 2. The plurality of holes 212 are provided at predetermined intervals on the inner peripheral side of the bottom portion 210 along the circumferential direction Dc. The rotor 200 is attached to the engine 2 by utilizing the holes 212 and holes provided in the engine 2.

[0035] The bottom portion 210 has an annular shape. One or more holes 250 are provided in the bottom portion 210. As shown in Fig. 3, holes 250a to 250h are provided in the bottom portion 210 at predetermined intervals along the circumferential direction Dc. The holes 250a to 250h are located on the outer circumferential side of the hole 212.

[0036] The diameter (Lc) of holes 250a-250h is not particularly limited as long as it is large enough for a human arm to pass through, but is preferably 180mm-350mm, and more preferably 220mm-280mm. That is, Lc is preferably 180mm or more, and more preferably 220mm or more. Lc is preferably 350mm or less, and more preferably 280mm or less.

[0037] By making the diameter of the holes 250a to 250h 180 mm or more, a person's arms can be passed through the holes, facilitating attachment of the rotor 200 (described later) to the engine 2. This also reduces the weight of the rotor 200, improving the power generation efficiency of the marine generator 1. Furthermore, since gas can be circulated through the holes 250a to 250h, the stator 100 can be cooled efficiently.

[0038] The frame 220 has a circular cylindrical shape centered on the axial center Ax (see FIG. 2B). The rear side of the frame 220 is connected to the outer peripheral end of the bottom 210.

[0039] The permanent magnets 230 are attached to the frame portion 220 (see FIG. 2B). The permanent magnets 230 are attached at predetermined intervals around the entire circumference of the frame portion 220 along the circumferential direction Dc. The magnetic poles of the permanent magnets 230 arranged along the circumferential direction Dc are arranged alternately with adjacent permanent magnets 230. Note that FIGS. 2B and 4 only show a portion of the permanent magnets 230.

[0040] 5, multiple permanent magnets 230 are installed in the front-to-rear direction. The permanent magnets are installed so that the magnetic poles of adjacent permanent magnets 230 aligned in the front-to-rear direction are the same. The permanent magnets 230 are fixed onto a plate 232. There are no particular limitations on the fixing method, and the permanent magnets 230 are fixed, for example, with an adhesive. The permanent magnets 230 are covered with a magnet cover 234. The plate 232 and the magnet cover 234 have a rectangular shape when viewed from above and below.

[0041] The liner 240 is attached to the frame portion 220 and extends from the axial center Ax in the radial direction Dd. The material of the liner 240 is not particularly limited, but is preferably one that can be processed with high precision, such as iron or stainless steel. As shown in FIG. 5, the rotor 200 includes a liner 240a and a liner 240b. The liner 240a is provided at the front end of the frame portion 220, and the liner 240b is provided at the rear end of the frame portion 220. Note that the liner 240a and the liner 240b have the same shape, and therefore, the liner 240a and the liner 240b may be referred to as the liner 240 without being distinguished from each other.

[0042] The liner 240 has a shape that protrudes upward (see FIGS. 3 and 4). The shape of the end of the liner 240 extending in the radial direction Dd from the axial center Ax is an arc centered at the axial center Ax. In other words, the center of the arc formed by the outer circumferential end of the liner 240 is the same as the center of the arc formed by the inner circumferential end of the clamp 160. Furthermore, in the radial direction Dd, the distance from the inner circumferential end to the outer circumferential end of the liner 240 is longer than the distance from the inner circumferential end to the outer circumferential end of the permanent magnet 230 or the distance from the inner circumferential end of the plate 232 to the outer circumferential end of the magnet cover 234.

[0043] The thickness (Ld) of the liner 240 in the front-to-rear direction is preferably 10 mm to 25 mm, and more preferably 15 mm to 20 mm. That is, Ld is preferably 10 mm or more, and more preferably 15 mm or more. Ld is preferably 25 mm or less, and more preferably 20 mm or less.

[0044] A liner 240 is provided for each magnetic pole of the magnets aligned in the front-rear direction. In this embodiment, 36 liners 240 are formed on the frame portion 220 along the circumferential direction Dc on the front surface of the rotor 200. Similarly, 36 liners 240 are formed on the frame portion 220 along the circumferential direction Dc on the rear surface of the rotor 200. Each of the liners 240 has the same shape.

[0045] The distance (Le) from the upper end of the liner 240 to the lower end of the clamp 160 in the radial direction Dd is a distance that allows the insertion of a spacer 500, which will be described later. For example, Le is preferably 4 mm to 8 mm. In other words, Le is preferably 4 mm or more. Le is preferably 8 mm or less.

[0046] 5, the front surfaces of the clamp 160a, liner 240a, and frame 220 are flush with each other, while the rear surfaces of the clamp 160b, liner 240b, and frame 220 are flush with each other.

[0047] The stator fixing portion 260 is a portion that fixes the stator 100 to the rotor 200. The stator fixing portion 260 is provided on the bottom portion 210. Eight stator fixing portions 260 are provided along the circumferential direction Dc, on the outer circumferential side of the holes 250. The stator fixing portions 260 are provided to correspond to the rotor fixing portions 170. The stator fixing portions 260 may be provided with holes, or may have nuts attached thereto.

[0048] The marine generator 1 may include a spacer 500. As shown in Fig. 5, the spacer 500 is inserted between the clamp 160 and the liner 240. The material of the spacer 500 is not particularly limited, but is preferably a rigid material such as stainless steel, iron, or copper.

[0049] The spacer 500 has a plate shape. The thickness of the spacer 500 is shorter than the distance between the clamp 160 and the liner 240. More specifically, the thickness of the spacer 500 is shorter than the distance from the inner end of the clamp 160 to the outer end of the liner 240 in the radial direction Dd. Furthermore, the length of the spacer 500 in the front-to-rear direction is longer than the length between the clamp 106a and the clamp 106b or the length between the liners 240a and 240b.

[0050] The spacer 500 may have a cylindrical ring shape centered on the axial center Ax. The spacer 500 may be formed by dividing a cylindrical ring member into a plurality of pieces.

[0051] [Cooler unit and motor] Fig. 7 is a perspective cross-sectional view showing, with some parts omitted, the configuration of a marine generator according to an embodiment of the present invention. Fig. 7 is a perspective cross-sectional view taken along line AA in the perspective view of Fig. 2A. As shown in Figs. 2A, 2B, and 7, the marine generator 1 includes a cooler unit 300 and a motor 320. The cooler unit 300 is attached to the top of the stator 100.

[0052] The cooler unit 300 includes a cooler body 306, fins 308, and cooler cover portions 304a and 304b. The cooler body 306 can contain water to cool the gas serving as a cooling medium. The cooler unit 300 circulates and cools the gas. The gas in the cooler unit 300 is drawn in through a first region 310 located at the bottom of the cooler body 306, passes through the cooler body 306, and is discharged through a second region 312 located at the top of the cooler body 306, where it circulates within the stator 100 and rotor 200. Specifically, the gas drawn in through the first region 310 passes from the left to the top of the cooler body 306. The gas, cooled by passing through the top of the cooler body 306, passes through the fins 308 from the second region 312 and circulates within the stator 100. The gas that has circulated inside the stator 100 is drawn in through the first region 310. Note that the gas inside the cooler unit 300 may be drawn in through the second region 312, pass through the cooler body 306, be discharged from the first region 310, and circulate inside the stator 100 and the rotor 200.

[0053] The cooler cover portion 304a is installed at the opening 302a through which gas can be taken in or exhausted from the outside. Similarly, the cooler cover portion 304b is installed at the opening 302b through which gas can be taken in or exhausted from the outside. The cooler cover portions 304a and 304b are detachable from the cooler unit 300. During normal operation of the marine generator 1, the openings 302a and 302b are covered by the cooler cover portions 304a and 304b.

[0054] Motor 320 is attached to the top of cooler unit 300 and promotes the intake and exhaust of gas flowing through stator 100 and rotor 200. Motor 320 includes motor bodies 322a and 322b and impeller 324. Motor 320 rotates around an axis parallel to the vertical direction.

[0055] Next, a method for mounting the marine generator 1 according to the embodiment of the present invention to an engine will be described. Since the marine generator 1 according to the embodiment of the present invention includes the permanent magnets 230 in the rotor 200, the rotor 200 is inserted into the stator 100 when the generator is mounted.

[0056] First, the engineer measures the distance between the liner 240 and the clamp 160 with the stator 100 and the rotor 200 temporarily fixed to the engine 2. The method for measuring the distance between the liner 240 and the clamp 160 is not particularly limited, but for example, the distance between the liner 240 and the clamp 160 may be measured by inserting a tapered gap gauge between the liner 240 and the clamp 160.

[0057] Based on the measurement results, the engineer fixes the stator 100 and the rotor 200 to the engine 2. Specifically, the engineer repeatedly measures the distance between the liner 240 and the clamp 160 for each of the installed liners 240. The engineer adjusts the position of the rotor 200 or the stator 100 in the left-right or up-down direction so that the measured distance between the liner 240 and the clamp 160 for each of the liners 240 falls within a predetermined distance range. After confirming that the distance between the liner 240 and the clamp 160 falls within the predetermined distance range, the engineer fixes the stator 100 and the rotor 200 to the engine 2.

[0058] Here, the rotor 200 can be attached to the engine 2, for example, as follows: The bottom 210 of the rotor 200 is brought into contact with the flange of the engine 2. A technician places their arm through the hole 250 from the front of the bottom 210. Then, a stud bolt with a nut attached is inserted from the back of the flange through a hole provided in the flange of the engine 2 and into hole 212. A nut is then attached to the stud bolt protruding from hole 212, and the nut is tightened while the stud bolt is being tensioned with a bolt tensioner. By repeatedly fastening the bolt in each of the holes 212, the rotor 200 can be attached to the engine 2.

[0059] Next, a method for transporting the marine generator 1 according to the embodiment of the present invention will be described. Since the marine generator 1 according to the embodiment of the present invention includes the permanent magnets 230 in the rotor 200, the rotor 200 and the stator 100 are transported as a single unit.

[0060] First, the technician inserts the spacer 500 between the liner 240 and the clamp 160. Next, after inserting the spacer 500, the technician transports the marine generator 1. The spacer 500 is removed after the marine generator 1 is transported to an installation location such as inside a ship and attached to the engine 2.

[0061] The method for transporting the marine generator 1 may also be performed as follows. First, an engineer connects the stator stator part 260 and the rotor stator part 170 using a fixing member. This fixes the stator 100 to the rotor 200, and the rotor 200 to the stator 100. Next, the engineer fixes the stator 100 to the rotor 200 using the fixing member, and then transports the marine generator 1. The fixing member is not particularly limited, but may be, for example, a bolt and a nut.

[0062] The marine generator 1 may be transported after the spacers 500 are inserted and the stator stator part 260 and the rotor stator part 170 are fixed together.

[0063] Next, a method for manufacturing the stator 100 of the marine generator 1 according to the embodiment of the present invention will be described. First, the stator coil 120 is vacuum-impregnated with an impregnation resin. The vacuum impregnation insulates the stator coil 120. Next, an engineer places the vacuum-impregnated stator coil 120 in slots provided in the stator core 130 and clamps 160, as shown in FIG. 4. Note that FIG. 4 shows only a portion of the stator coil 120.

[0064] This allows the size of the object to be vacuum impregnated to be smaller than when the stator coil 120 is vacuum impregnated while it is housed in the slot of the stator core 130. As a result, the size of the marine generator 1 can be increased.

[0065] The vacuum-impregnated stator coil 120 may be dried before being fitted into the slots of the stator core 130, or may be dried after being fitted into the slots of the stator core 130.

[0066] In the above description, 36 liners 240 are provided around the entire circumference of the frame portion 220 on the front surface of the rotor 200, but the number of liners 240 is not particularly limited. For example, the liners 240 may be arranged on the frame portion 220 symmetrically with respect to the axial center Ax.

[0067] The number of rotor fixing portions 170, openings 182, holes 212, holes 250, and / or stator fixing portions 260 provided on the marine generator 1 is not particularly limited and can be designed appropriately depending on the size and shape of the marine generator 1.

[0068] In this way, a marine generator including a stator and a rotor and attached to an engine, the stator including a stator mounting portion attached to the engine and a stator coil, the rotor including a bottom portion attached to the engine, a frame portion having a cylindrical ring shape centered on the axial center of the rotation shaft about which the rotor rotates, and a permanent magnet attached to the frame portion, and the rotor generating electricity by rotating in response to the rotation of the engine, can provide a novel marine generator. Furthermore, because the rotor includes a permanent magnet, it is possible to omit flowing a field current through the rotor when generating electricity, thereby reducing energy consumption related to power generation. Furthermore, because the marine generator is attached to the engine, there is no need to secure space for installing a generator between the engine and the propeller, which increases the degree of freedom in designing the shape of the ship.

[0069] Furthermore, since the stator includes a stator core having a circular ring shape centered on the axial center, and the distance from the axial center to the outer peripheral end of the stator core is 700 mm to 2000 mm, the size of the marine generator can be increased.

[0070] Furthermore, since the stator includes a ring portion electrically connected to one or more of the stator coils or a conductive portion electrically connected to the ring portion, and the stator coil and the ring portion, or the ring portion and the conductive portion, are connected by a connecting member that is flexible and electrically conductive, it becomes easy to attach the ring portion when attaching the stator to the engine.

[0071] Furthermore, since the stator includes a clamp extending radially toward the axial center, the rotor includes a liner attached to the frame and extending radially from the axial center, and the end of the clamp extending toward the axial center has an arc shape centered on the axial center, and the end of the liner extending radially from the axial center also has an arc shape centered on the axial center, the stator and the rotor can be attached to the engine so that the distances between the stator and the rotor are uniform. This makes it possible to uniformize the power generated by each of the multiple stator coils attached to the stator.

[0072] Furthermore, by providing a spacer inserted between the clamp and the liner, the stator and rotor can be fixed in place when the marine generator is transported. Furthermore, to fix the stator and rotor, it is preferable that the stator includes a rotor fixing portion for fixing the rotor, and the rotor includes a stator fixing portion for fixing the stator. This prevents the stator and rotor from coming into contact with each other due to vibrations during transportation, which could result in damage to the stator or rotor.

[0073] Furthermore, by providing one or more holes in the bottom portion in this manner, it becomes easier to attach the rotor to the engine.

[0074] In this way, the stator and rotor can be cooled by providing a cooler unit that is attached to the top of the stator and circulates gas to cool it, and a motor that is attached to the top of the cooler unit and promotes the intake of gas and the discharge of cooled gas into the stator and rotor.

[0075] During normal operation of the marine generator 1, all openings 182 are covered by the cover 184, and openings 302a and 302b are covered by cooler cover 304a and 304b. Therefore, the gas inside the stator 100 is used to cool the marine generator 1. The air in the engine room where the marine generator 1 is installed contains contaminants such as carbon. However, cooling as described above reduces the adhesion of contaminants to the permanent magnets 230. Furthermore, as described above, the stator includes a stator cover having an opening through which gas can be taken in or exhausted from the outside, and a cover covering the opening. The cooler unit includes a cooler cover installed on the opening through which gas can be taken in or exhausted from the outside. Because the cover and the cooler cover are removable, the rotor and stator can be cooled even if a component of the cooler unit fails.

[0076] For example, if the cooler main body 306 breaks down, a technician removes the cover portion 184 and the cooler cover portions 304a and 304b. This allows gas to be drawn in through the opening 182 and exhausted through the openings 302a and 302b. Alternatively, gas can be drawn in through the openings 302a and 302b and exhausted through the opening 182. In this way, the inside of the stator 100 can be cooled even in the event of a breakdown. Note that the motor 320 may facilitate the intake of gas through the opening 182 and the exhaust of gas through the openings 302a and 302b, or the intake of gas through the openings 302a and 302b and the exhaust of gas through the opening 182. [Explanation of symbols]

[0077] 1 Marine generator 2 Engine 3 Shaft 4 Propeller 100 stator 110 stator mounting portion 120 stator coil 130 Stator core 132 Duct piece 140 Ring part 150 Conductive part 160 Clamp 170 rotor fixing portion 180 stator cover portion 182 opening 184 cover portion 200 rotors 210 Bottom 212 Hole 220 Frame 230 Permanent magnet 232 Plate 234 Magnet cover 240 Liner 250a~250h Hole 260 Stator fixing part 300 Cooler Unit 302a, 302b Openings 304a, 304b Cooler cover parts 306 Cooler body 308 Fin 310 1st area 312 2nd area 320 motor 322a, 322b motor body 324 impeller 400 connecting member 402 terminal 404 terminal 406 connecting portion 500 spacer

Claims

1. A marine generator comprising a stator and a rotor and attached to an engine, The stator is a stator mounting portion attached to the engine; Stator coil and Including, The rotor is a bottom portion attached to the engine; a frame portion having a cylindrical ring shape centered on the central axis of a rotation shaft on which the rotor rotates; a permanent magnet attached to the frame; Including, The marine generator generates electricity by rotating the rotor in response to the rotation of the engine.

2. the stator includes a stator core having an annular shape centered on the axial center, 2. The marine generator according to claim 1, wherein the distance from the shaft center to the outer peripheral edge of the stator core is 700 mm to 2000 mm.

3. The stator is A ring portion electrically connected to one or more of the stator coils. Including, 3. The marine generator according to claim 1, wherein the stator coil and the ring portion are connected by a flexible and electrically conductive connecting member.

4. The stator is A ring portion electrically connected to one or more of the stator coils and a conductive portion electrically connected to the ring portion. Including, 3. The marine generator according to claim 1, wherein the ring portion and the conductive portion are connected by a flexible and electrically conductive connecting member.

5. the stator includes a clamp extending radially toward the axial center, the rotor includes a liner attached to the frame and extending in the radial direction from the axial center, The shape of the end of the clamp extending toward the axial center has an arc shape centered on the axial center, 3. The marine generator according to claim 1, wherein the end of the liner extending radially from the axial center has an arc shape centered at the axial center.

6. 6. The marine generator of claim 5, further comprising a spacer interposed between the clamp and the liner.

7. 3. A marine generator according to claim 1 or 2, wherein the bottom is provided with one or more holes.

8. the stator includes a rotor fixing portion for fixing the rotor, 3. The marine generator according to claim 1, wherein the rotor includes a stator fixing portion for fixing the stator.

9. a cooler unit attached to an upper portion of the stator and configured to circulate gas for cooling; a motor attached to an upper portion of the cooler unit for promoting intake of gas and discharge of cooled gas to the stator and the rotor; The marine generator according to claim 1 or 2, comprising:

10. the stator includes a stator cover portion provided with an opening through which gas can be taken in or exhausted from the outside, and a cover portion that covers the opening, The cooler unit includes a cooler cover portion installed at an opening that can take in or exhaust gas from the outside, The marine generator according to claim 9, wherein the cover portion and the cooler cover portion are removable.

11. A method for mounting a marine generator having a stator and a rotor to an engine, comprising: The stator is a stator mounting portion attached to the engine; A stator coil; a clamp extending radially toward the axial center; Including, The rotor is a bottom portion attached to the engine; a frame portion having a cylindrical ring shape centered on the central axis of a rotation shaft on which the rotor rotates; a permanent magnet attached to the frame; a liner attached to the frame and extending in the radial direction from the axial center; Including, The shape of the end of the clamp extending toward the axial center has an arc shape centered on the axial center, The shape of the end of the liner extending in the radial direction has an arc shape centered on the axial center, a measuring step of measuring a distance between the liner and the clamp in a state where the stator and the rotor are temporarily fixed to the engine; a fixing step of fixing the stator and the rotor to the engine based on the results of the measurement in the measuring step; An attachment method having:

12. A method for transporting a marine generator having a stator and a rotor, comprising: The stator is a stator mounting portion attached to the engine; A stator coil; a clamp extending radially toward the axial center; Including, The rotor is a bottom portion attached to the engine; a frame portion having a cylindrical ring shape centered on the central axis of a rotation shaft on which the rotor rotates; a permanent magnet attached to the frame; a liner attached to the frame and extending in the radial direction from the axial center; Including, The shape of the end of the clamp extending toward the axial center has an arc shape centered on the axial center, an end portion of the liner extending radially from the axial center has an arc shape centered on the axial center, inserting a spacer between the liner and the clamp; a transporting step of transporting the marine generator after the inserting step; A transportation method having the following features.

13. the stator includes a stator fixing portion for fixing the rotor, the rotor includes a rotor fixing portion for fixing the stator, a fixing step of connecting the stator fixing portion and the rotor fixing portion using a fixing member; a transporting step of transporting the marine generator after the inserting step and the fixing step; The method of claim 12.

14. A method for manufacturing a stator of a marine generator that is attached to an engine and includes a stator and a rotor, the method comprising: The stator is a stator mounting portion attached to the engine; a stator core; a stator coil at least a portion of which is accommodated in a slot provided in the stator core; Including, vacuum impregnating the stator coil; placing the vacuum-impregnated stator coils in the slots provided in the stator core; The manufacturing method of the present invention.

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