Shipboard generator, method for mounting shipboard generator, and method for transporting shipboard generator

Abstract

Provide a novel marine generator. 【Solution means】 A marine generator comprising a stator and a rotor, and is attached to an engine. The stator includes a stator mounting portion attached to the engine and a stator coil. The rotor includes a bottom portion attached to the engine, a frame portion having an annular columnar shape centered on the axial center portion of the rotating shaft on which the rotor rotates, and a permanent magnet attached to the frame portion. Power is generated by the rotation of the rotor in response to the rotation of the engine.

Description

Technical Field

[0001] The present invention relates to a marine generator, a mounting method for a marine generator, and a transportation method for a marine generator.

Background Art

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

[0003] When a shaft generator is installed on the main shaft between an engine and a propeller as in the shaft generator of Patent Document 1, it is necessary to secure a space for installing the shaft generator between the engine and the propeller.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems 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 Problems

[0006] The problems of the present invention are [1]A shipboard generator comprising a stator and a rotor, which is attached to an engine, wherein the stator includes a stator mounting portion attached to the engine and a stator coil, and the rotor includes a bottom portion attached to the engine, a frame portion having an annular columnar shape centered on the axial center portion of the rotating shaft around which the rotor rotates, and a permanent magnet attached to the frame portion, and the rotor generates electricity by rotating in response to the rotation of the engine; [2]The shipboard generator according to [1], wherein the stator includes a stator core having an annular shape centered on the axial center portion, and the distance from the axial center portion to the outer peripheral end portion of the stator core is 700 mm to 2000 mm; [3]The shipboard 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 shipboard generator according to any one of [1] to [3], wherein the stator includes a conductive portion electrically connected to a ring portion electrically connected to one or more of the stator coils, and the ring portion and the conductive portion are connected by a connecting member having flexibility and electrical conductivity; [5]The shipboard generator according to any one of [1] to [4], wherein the stator includes a clamp extending along the radial direction toward the axial center portion, the rotor is attached to the frame portion and includes a liner extending in the radial direction from the axial center portion, the shape of the end portion of the clamp extending toward the axial center portion has an arc shape centered on the axial center portion, and the shape of the end portion of the liner extending in the radial direction from the axial center portion has an arc shape centered on the axial center portion; [6]The shipboard generator according to [5], further comprising a spacer inserted between the clamp and the liner; [7]The shipboard generator according to any one of [1] to [6], wherein one or more holes are provided in the bottom portion; [8]The shipboard 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 generator for a ship according to any one of [1] to [8], comprising a cooler unit attached to the upper part of the stator for circulating and cooling gas, and a motor attached to the upper part of the cooler unit for promoting intake of gas and discharging the cooled gas to the stator and the rotor.

[10] The stator of the generator for a ship according to [9] includes a stator cover portion provided with an opening for intake or exhaust of gas from the outside and a cover portion covering the opening, the cooler unit includes a cooler cover portion installed at an opening for intake or exhaust of gas from the outside, and the cover portion and the cooler cover portion are removable.

[11] An attachment method for attaching a generator for a ship having a stator and a rotor to an engine, wherein the stator includes a stator attachment portion attached to the engine, a stator coil, and a clamp extending along the radial direction toward the axial center portion, the rotor includes a bottom portion attached to the engine, a frame portion having an annular columnar shape centered on the axial center portion of the rotating shaft around which the rotor rotates, a permanent magnet attached to the frame portion, and a liner attached to the frame portion and extending from the axial center portion in the radial direction, the shape of the end portion of the clamp extending toward the axial center portion has an arc shape centered on the axial center portion, the shape of the end portion of the liner extending in the radial direction has an arc shape centered on the axial center portion, a measuring step of measuring the distance between the liner and the clamp in a state where 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 result measured 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 along a radial direction toward the axial center portion, the rotor includes a bottom attached to the engine, a frame portion having an annular columnar shape centered on the axial center portion of the rotation axis around which the rotor rotates, a permanent magnet attached to the frame portion, and a liner attached to the frame portion and extending from the axial center portion in the radial direction, the shape of the end portion of the clamp extending toward the axial center portion has an arc shape centered on the axial center portion, the shape of the end portion of the liner extending in the radial direction from the axial center portion has an arc shape centered on the axial center portion, 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 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, and the transportation step transports the marine generator after the insertion step and the fixing step, according to the transportation method described in

[12] above;

[14] A method for manufacturing the stator of a marine generator including a stator and a rotor and attached to an engine, wherein the stator includes a stator mounting portion attached to the engine, a stator core, and a stator coil at least partially housed in a slot provided in the stator core, the method having a step of vacuum impregnating the stator coil and a step of housing the vacuum-impregnated stator coil in the slot provided in the stator core; It can be solved by.

Advantages of the Invention

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

Brief Description of the Drawings

[0008]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments as long as it does not conflict with the gist of the present invention. Also, the description of the effects is one aspect of the effects of the embodiments of the present invention and is not limited to what is described here.

[0010] FIG. 1 is a schematic diagram of the mounting position of the marine generator according to the embodiment of the present invention. As shown in FIG. 1, the marine generator 1 according to the embodiment of the present invention is attached to the engine 2. The engine 2 drives the propeller 4 by rotating the shaft 3. The propeller 4 is a propeller for propelling the ship. The marine generator 1 is attached to the engine 2 on the side opposite to the shaft 3 that drives the propeller 4. The marine generator 1 is a so-called overhang type shaft generator. The engine 2 rotates each mechanism of the marine generator 1. The engine 2 is, for example, a diesel engine, a gas turbine engine, or the like.

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

[0012] Hereinafter, the direction in which the rotation axis of the rotor 200 extends is defined as the front-rear direction. The up-down direction means the up-down direction of the marine generator 1. The front-rear direction is orthogonal to the up-down direction. The direction orthogonal to the front-rear direction and the up-down direction is defined as the left-right direction. Note that the left-right direction and the front-rear direction are directions 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 during the use of the marine generator 1. The left direction and the right direction may be interchanged, and the front direction and the rear direction may be interchanged. Also, the central portion of the rotation axis around which the rotor 200 rotates is defined as the axis central portion Ax, and the direction in which the rotor 200 rotates is defined as the circumferential direction Dc. The direction away from the axis central portion Ax when viewed from the front-rear direction is defined as the outer circumferential direction, and the direction approaching the axis central portion Ax when viewed from the front-rear direction is defined as the inner circumferential direction. Also, the direction orthogonal to the front-rear direction and along the inner circumferential direction and the outer circumferential direction is defined as the radial direction Dd. Also, in the radial direction Dd, the side closer to the axis central portion Ax is defined as the inner circumferential side, and the side farther from the axis central portion Ax is defined as the outer circumferential side.

[0013] Also, in this specification, that a member extends upward includes both the case where the member is parallel to the upward direction and the case where the member is inclined with respect to the upward direction. In this case, the angle formed by the member and the upward direction is 40 degrees or less.

[0014] FIG. 2A is a perspective view showing a configuration of a marine generator according to an embodiment of the present invention with some parts omitted. FIG. 2B is a perspective view showing a configuration of a marine generator according to an embodiment of the present invention with some parts omitted. FIG. 3 is a view showing a configuration of a stator and a rotor according to an embodiment of the present invention with some parts omitted. FIG. 3 is a view of the clamp and the rotor as seen from the front to the rear. In FIG. 3, although the frame of the stator exists outside the outer periphery of the clamp, it is omitted.

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

[0016] Hereinafter, each configuration of the marine generator 1 will be described.

[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. The stator mounting portion 110 is provided with a plurality of holes. The stator 100 is attached to the engine 2 by using the holes provided in the stator mounting portion 110 and the holes provided in the engine 2.

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

[0020] When the distance from the axial center portion Ax to the outer peripheral end portion of the stator core 130 is defined as La, it 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 shape of the outer periphery of the clamp 160 and the shape of the outer periphery of the stator core 130 are the same.

[0021] As shown in FIG. 5, in the front-rear direction, a duct piece 132 is installed between the stator cores 130. The duct piece 132 is a rod-shaped member that is inclined with respect to the radial direction Dd. The duct piece 132 forms a refrigerant duct through which a cooling medium can flow in the radial direction Dd.

[0022] The clamp 160 fixes the stator core 130 which is an electromagnetic steel sheet laminated in the front-rear direction. The material of the clamp 160 is not particularly limited, but it is preferably one that can be processed with high precision, such as iron, stainless steel, etc. As shown in FIG. 5, the stator 100 includes a clamp 160a and a clamp 160b. The clamp 160a is provided on the front surface of the stator core 130. The clamp 160b is provided on the rear surface of the stator core 130. The stator core 130 is sandwiched between the clamp 160a and the clamp 160b. Since the clamp 160a and the clamp 160b have the same shape, they may be represented as the clamp 160 without distinguishing between the clamp 160a and the clamp 160b.

[0023] The clamp 160 extends along the radial direction Dd toward the axial center portion Ax. The clamp 160 has an annular shape centered on the axial center portion Ax. The clamp 160 may be formed by laminating annular members centered on the axial center portion Ax in the front-rear direction. The shape of the outer periphery of the clamp 160 and the shape of the outer periphery of the stator core 130 may coincide. The clamp 160 is provided with slots for accommodating the stator coil 120. When viewed from the front to the rear, the shape of the slots of the clamp 160 and the shape of the slots of the stator core 130 are similar (they do not have to coincide exactly) (see FIGS. 2B and 4). Also, as shown in FIG. 3, when viewed from the front to the rear, the shape of the clamp 160 and the shape of the stator core 130 are similar (they do not have to coincide exactly).

[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 portion of the clamp 160 extending toward the shaft center portion Ax has an arc shape centered on the shaft center portion Ax. Also, in the radial direction Dd, the distance from the outer peripheral end portion to the inner peripheral end portion of the clamp 160 may be the same as the distance from the outer peripheral end portion to the inner peripheral end portion of the stator core 130, or may be longer than that distance.

[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 the stator according to an embodiment of the present invention. FIG. 6 is an enlarged perspective view of the region Y shown in FIG. 2B and is a perspective view through the frame of the stator 100. In FIG. 6, the stator coil 120, the stator core 130, and the clamp 160 are omitted.

[0027] The ring portion 140 is an annular member for flowing the current generated in the stator coil 120 to the conductive portion 150. In the marine generator 1, when the permanent magnet 230 included in the rotor 200 rotates, a current is generated in the stator coil 120. 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 having flexibility and electrical conductivity. Also, as shown in FIG. 6, the ring portion 140 and the conductive portion 150 are connected by a connecting member 400 having flexibility and electrical conductivity.

[0028] The connecting member 400 includes terminals 402, 404 and a connecting portion 406. As shown in FIG. 6, the terminal 402 is connected to the conductive portion 150, and the terminal 404 is connected to the ring portion 140. Also, the terminal 402 and the terminal 404 are connected by the connecting portion 406. The connecting portion 406 may be a conducting wire formed by braiding a plurality of thin metal wires, for example, a flat braided copper wire formed by braiding thin copper wires in a planar shape.

[0029] Since the connecting member 400 has flexibility, when attaching the stator 100 to the engine 2, the connecting member 400 can be connected according to 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 for fixing 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 circumferential side of the opening 182 described later. A hole may be provided in the rotor fixing portion 170, or a nut may be attached thereto.

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

[0032] In addition, the stator cover portion 180 is provided with an opening 182 through which gas can be inhaled 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 opening 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 the openings 182 are covered by the cover portion 184.

[0033] [Rotor] The rotor 200 includes a bottom portion 210, a frame portion 220, permanent magnets 230, a liner 240, and a stator fixing 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. A plurality of holes 212 for attaching the rotor 200 to the engine 2 are provided in the bottom portion 210. The plurality of holes 212 are provided at predetermined intervals along the circumferential direction Dc on the inner circumferential side of the bottom portion 210. The holes 212 and the holes provided in the engine 2 are used to attach the rotor 200 to the engine 2.

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

[0036] The diameter (Lc) of the holes 250a to 250h is not particularly limited as long as it is a size through which a human arm can pass. For example, it is preferably 180 mm to 350 mm, and more preferably 220 mm to 280 mm. That is, Lc is preferably 180 mm or more, and more preferably 220 mm or more. Lc is preferably 350 mm or less, and more preferably 280 mm or less.

[0037] When the diameter of the holes 250a to 250h is 180 mm or more, it becomes easy to attach the rotor 200 described later to the engine 2 through which a human arm can pass. Also, the weight of the rotor 200 can be reduced, and the power generation efficiency of the marine generator 1 can be increased. Further, since gas can be circulated from the holes 250a to 250h, the stator 100 can be efficiently cooled.

[0038] The frame portion 220 has an annular columnar shape centered on the axis center portion Ax (see FIG. 2B). The rear side of the frame portion 220 is connected to the outer peripheral end portion of the bottom 210.

[0039] The permanent magnet 230 is attached to the frame portion 220 (see FIG. 2B). The permanent magnet 230 is attached at predetermined intervals along 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 so as to alternate between adjacent permanent magnets 230. Note that FIGS. 2B and 4 show a part of the permanent magnet 230.

[0040] Also, as shown in FIG. 5, a plurality of permanent magnets 230 are installed in the front-rear direction. The magnetic poles of the permanent magnets arranged in the front-rear direction are installed so as to be the same between adjacent permanent magnets 230. The permanent magnet 230 is fixed on the plate 232. The fixing method is not particularly limited, and the permanent magnet 230 is fixed with, for example, an adhesive or the like. The permanent magnet 230 is covered with a magnet cover 234. The plate 232 and the magnet cover 234 have a rectangular shape when viewed from top to bottom.

[0041] The liner 240 is attached to the frame portion 220 and extends in the radial direction Dd from the axial center portion Ax. The material of the liner 240 is not particularly limited, but it is preferably a material 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 portion of the frame portion 220, and the liner 240b is provided at the rear end portion of the frame portion 220. Since the liner 240a and the liner 240b have the same shape, the liner 240a and the liner 240b may not be distinguished and may be represented as the liner 240.

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

[0043] The thickness (Ld) of the liner 240 in the front-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] The liner 240 is provided for each magnetic pole of the magnets arranged in the front-rear direction. In the present embodiment, on the front surface of the rotor 200, 36 liners 240 are formed in the frame portion 220 along the circumferential direction Dc. Similarly, on the rear surface of the rotor 200, 36 liners 240 are formed in the frame portion 220 along the circumferential direction Dc. The liners 240 each have the same shape.

[0045] The distance (Le) from the upper end portion of the liner 240 to the lower end portion of the clamp 160 in the radial direction Dd is a distance into which the spacer 500 described later can be inserted. For example, Le is preferably 4 mm to 8 mm. That is, Le is preferably 4 mm or more. Le is preferably 8 mm or less.

[0046] As shown in FIG. 5, the front surfaces of the clamp 160a, the liner 240a, and the frame portion 220 are located on the same plane. Also, the rear surfaces of the clamp 160b, the liner 240b, and the frame portion 220 are located on the same plane.

[0047] The stator fixing portion 260 is a portion for fixing 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 peripheral side of the hole 250. The stator fixing portion 260 is provided so as to correspond to the rotor fixing portion 170. A hole may be provided in the stator fixing portion 260, or a nut may be 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 one having rigidity, for example, stainless steel, iron, copper, or the like.

[0049] The spacer 500 has a plate shape. The thickness of the spacer 500 is shorter than the length 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. Also, the length of the spacer 500 in the front-rear direction is longer than the length between the clamp 106a and the clamp 106b or the length between the liner 240a and the liner 240b.

[0050] Note that the spacer 500 may have an annular columnar shape centered on the axial center portion Ax. The spacer 500 may be a plurality of divided annular columnar members.

[0051] [Cooler Unit and Motor] FIG. 7 is a perspective cross-sectional view showing a partially omitted configuration of a marine generator according to an embodiment of the present invention. FIG. 7 is an A-A perspective cross-sectional view 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 upper part of the stator 100.

[0052] The cooler unit 300 includes a cooler main body 306, fins 308, and cooler cover parts 304a and 304b. Water, which is a cooling medium, can be put into the cooler main body 306. The cooler unit 300 circulates and cools the gas. The gas in the cooler unit 300 is sucked in from a first region 310 provided at the lower part of the cooler main body 306, passes through the cooler main body 306, is discharged from a second region 312 provided at the upper part of the cooler main body 306, and circulates in the stator 100 and the rotor 200. Specifically, the gas sucked in from the first region 310 passes from the left part to the upper part of the cooler main body 306. The gas cooled by passing through the upper part of the cooler main body 306 passes through the fins 308 from the second region 312 and circulates inside the stator 100. The gas that has circulated inside the stator 100 is sucked in from the first region 310. Note that the gas in the cooler unit 300 may be sucked in from the second region 312, pass through the cooler main body 306, be discharged from the first region 310, and circulate in the stator 100 and the rotor 200.

[0053] The cooler cover part 304a is installed at an opening 302a through which gas can be sucked in or exhausted from the outside. Similarly, the cooler cover part 304b is installed at an opening 302b through which gas can be sucked in or exhausted from the outside. The cooler cover parts 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 parts 304a and 304b.

[0054] The motor 320 is attached to the upper part of the cooler unit 300 and promotes the intake and exhaust of the gas circulating in the stator 100 and the rotor 200. The motor 320 includes motor main bodies 322a and 322b and an impeller 324. The motor 320 rotates about an axis parallel to the vertical direction.

[0055] Next, a method of attaching the marine generator 1 according to an embodiment of the present invention to an engine will be described. Since the marine generator 1 according to an embodiment of the present invention includes the permanent magnet 230 in the rotor 200, the attachment is performed with the rotor 200 inserted into the stator 100.

[0056] First, with the stator 100 and the rotor 200 temporarily fixed to the engine 2, the technician measures the distance between the liner 240 and the clamp 160. The method for measuring the distance between the liner 240 and the clamp 160 is not particularly limited. 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 technician fixes the stator 100 and the rotor 200 to the engine 2. Specifically, the technician repeats the measurement of the distance between the liner 240 and the clamp 160 for the plurality of attached liners 240. The technician adjusts the horizontal or vertical position of the rotor 200 or the stator 100 so that the distance between the liner 240 and the clamp 160 measured for the plurality of liners 240 is within a predetermined distance range. After confirming that the distance between the liner 240 and the clamp 160 is within the predetermined distance range, the stator 100 and the rotor 200 are fixed to the engine 2.

[0058] Here, the attachment of the rotor 200 to the engine 2 can be performed, for example, as follows. The bottom 210 of the rotor 200 is brought into contact with the flange of the engine 2. The technician passes an arm through the hole 250 from the front surface of the bottom 210. Then, a stud bolt with a nut attached is inserted from the back surface of the flange through the hole provided in the flange of the engine 2 into the hole 212. Then, a nut is attached to the stud bolt protruding from the hole 212, and the nut is tightened while pulling the stud bolt with a bolt tensioner. By repeating the fixing of the bolts at each of the holes 212, the rotor 200 can be attached to the engine 2.

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

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

[0061] Also, the method of transporting the marine generator 1 may be executed as follows. First, the technician connects the stator fixing portion 260 and the rotor fixing portion 170 using a fixing member. As a result, the stator 100 is fixed to the rotor 200, and the rotor 200 is fixed to the stator 100. Next, after fixing the stator 100 and the rotor 200 with the fixing member, the technician transports the marine generator 1. The fixing member is not particularly limited, and for example, it is a bolt and a nut.

[0062] Note that after inserting the spacer 500 and fixing the stator fixing portion 260 and the rotor fixing portion 170, the marine generator 1 may be transported.

[0063] Next, a method of manufacturing the stator 100 of the marine generator 1 according to an embodiment of the present invention will be described. First, the stator coil 120 is vacuum-impregnated in an impregnating resin. By vacuum-impregnating, the stator coil 120 is insulated. Next, the technician places the vacuum-impregnated stator coil 120 in slots provided in the stator core 130 and the clamp 160 as shown in FIG. 4. Note that FIG. 4 shows a part of the stator coil 120.

[0064] As a result, the size of the object to be vacuum-impregnated can be reduced as compared with the case where the stator coil 120 is vacuum-impregnated in a state of being housed in the slot of the stator core 130. Therefore, the size of the marine generator 1 can be increased.

[0065] Note that the vacuum-impregnated stator coil 120 may be dried and then housed in the slot of the stator core 130, or may be dried after being housed in the slot of the stator core 130.

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

[0067] In addition, the number of the rotor fixing portion 170, the opening 182, the holes 212 and 250, and / or the stator fixing portion 260 provided in the marine generator 1 is not particularly limited, and can be appropriately designed according to the size and shape of the marine generator 1.

[0068] As described above, a marine generator including a stator and a rotor and attached to an engine is provided. The stator includes a stator attachment portion attached to the engine and a stator coil. The rotor includes a bottom portion attached to the engine, a frame portion having an annular columnar shape centered on the axial center portion of the rotation axis around which the rotor rotates, and a permanent magnet attached to the frame portion. By generating electricity by rotating the rotor in response to the rotation of the engine, a novel marine generator can be provided. Further, since the rotor includes a permanent magnet, it is possible to omit flowing an exciting current through the rotor when generating electricity, and reduce the energy consumption related to power generation. Further, since the marine generator is attached to the engine, it is not necessary to secure a space for providing the generator between the engine and the propeller, and the degree of freedom in designing the shape of the ship can be increased.

[0069] Further, as described above, since the stator includes a stator core having an annular shape centered on the axial center portion and the distance from the axial center portion to the outer peripheral end portion of the stator core is 700 mm to 2000 mm, the size of the marine generator can be increased.

[0070] Also, in this way, the stator includes a ring portion that is electrically connected to one or more of the stator coils, or a conductive portion that is 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 connection member having flexibility and electrical conductivity, so that it is easy to attach the ring portion when attaching the stator to the engine.

[0071] Also, in this way, the stator includes a clamp that extends along the radial direction toward the axial center portion, the rotor is attached to the frame portion, includes a liner that extends in the radial direction from the axial center portion, the shape of the end portion of the clamp extending toward the axial center portion has an arc shape centered on the axial center portion, and the shape of the end portion of the liner extending in the radial direction from the axial center portion has an arc shape centered on the axial center portion, so that the stator and the rotor can be attached to the engine so that the distance between the stator and the rotor is equal. Thereby, in a plurality of stator coils attached to the stator, the power generated by each stator coil can be made uniform.

[0072] Also, in this way, by providing a spacer inserted between the clamp and the liner, the stator and the rotor can be fixed when transporting the marine generator. Further, in order to fix the stator and the 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. Thereby, it is possible to prevent the stator and the rotor from coming into contact with each other due to vibrations during transportation or the like, and the stator or the rotor from being damaged.

[0073] Also, in this way, by providing one or more holes in the bottom portion, it becomes easy to attach the rotor to the engine.

[0074] Further, by providing a cooler unit that is attached to the upper part of the stator and circulates and cools gas, and a motor that is attached to the upper part of the cooler unit and promotes intake of gas and discharge of the cooled gas to the stator and the rotor, the stator and the rotor can be cooled.

[0075] During normal operation of the marine generator 1, all the openings 182 are covered by the cover portion 184, and the openings 302a and 302b are covered by the cooler cover portions 304a and 304b. Therefore, the gas inside the stator 100 is used for cooling the marine generator 1. The air in the engine room where the marine generator 1 is installed contains dirt such as carbon, but by cooling as described above, it is possible to reduce the attachment of dirt to the permanent magnet 230. Further, in this way, the stator includes a stator cover portion provided with an opening capable of intake or exhaust of gas from the outside and a cover portion covering the opening, the cooler unit includes a cooler cover portion installed at an opening capable of intake or exhaust of gas from the outside, and the cover portion and the cooler cover portion are removable, so that even when a member of the cooler unit fails, the rotor and the stator can be cooled.

[0076] For example, when the cooler main body 306 fails, the technician removes the cover portion 184 and the cooler cover portions 304a and 304b. Thereby, gas is intake from the opening 182 and gas is exhausted from the openings 302a and 302b. Alternatively, gas is intake from the openings 302a and 302b and gas is exhausted from the opening 182. In this way, the inside of the stator 100 can be cooled even during a failure. Note that the motor 320 may promote intake of gas from the opening 182 and discharge of gas from the openings 302a and 302b, or intake of gas from the openings 302a and 302b and discharge of gas from the opening 182.

Explanation of Signs

[0077] 1 Marine generator 2 Engine 3 Shaft 4 Propeller 100 Stator 110 Stator mounting part 120 Stator coil 130 Stator core 132 Duct piece 140 Ring part 150 Conductive part 160 Clamp 170 Rotor fixing part 180 Stator cover part 182 Opening 184 Cover part 200 Rotor 210 Bottom 212 Hole 220 Frame part 230 Permanent magnet 232 Plate 234 Magnet cover 240 Liner 250a - 250h Holes 260 Stator fixing part 300 Cooler unit 302a, 302b Openings 304a, 304b Cooler cover part 306 Cooler body 308 Fin 310 First region 312 Second region 320 Motor 322a, 322b Motor body 324 Impeller 400 Connection member 402 Terminal 404 Terminal 406 Connection part 500 Spacer

Claims

1. A marine generator comprising a stator and a rotor and attached to an engine, The stator, a stator mounting portion attached to the engine; A stator coil; a clamp extending radially toward a center of a rotation shaft on which the rotor rotates; a stator core having an annular shape centered on the shaft center; Including, The rotor is a bottom portion attached to the engine; A frame portion having a cylindrical shape centered on the axial center portion; A permanent magnet attached to the frame; a liner attached to the frame and extending in the radial direction away from the axial center; Including, The rotor rotates in response to the rotation of the engine to generate electricity, The bottom portion is provided with one or more holes and a mounting hole for mounting the rotor to the engine; The hole is provided on an outer circumferential side of the mounting hole, The shape of the end of the clamp extending toward the axial center has an arc shape centered on the axial center, The clamp contacts the stator core or the clamp clamps the stator core, The shape of the end of the liner extending in the radial direction has an arc shape centered on the axial center, The clamp and the liner face each other in a radial direction. Marine generators.

2. A marine generator comprising a stator and a rotor and attached to an engine, The stator, a stator mounting portion attached to the engine; A stator coil; a clamp extending radially toward the center of a rotating shaft on which the rotor rotates; a stator core having an annular shape centered on the shaft center; Including, The rotor is a bottom portion attached to the engine; A frame portion having a cylindrical shape centered on the axial center portion; A permanent magnet attached to the frame; a liner attached to the frame and extending in the radial direction away from the axial center; Including, The rotor rotates in response to the rotation of the engine to generate electricity, The bottom portion is provided with one or more holes and a mounting hole for mounting the rotor to the engine; The hole is provided on an outer circumferential side of the mounting hole, The shape of the end of the clamp extending toward the axial center has an arc shape centered on the axial center, The outer periphery of the clamp is substantially the same as the outer periphery of the stator core; The shape of the end of the liner extending in the radial direction has an arc shape centered on the axial center, The clamp and the liner face each other in a radial direction. Marine generators.

3. 3. The marine generator according to claim 1, wherein the hole has a diameter of 180 mm to 350 mm.

4. A marine generator as described in claim 1 or 2, wherein the distance from the center of the shaft to the outer peripheral end of the stator core is 700 mm to 2000 mm.

5. The stator, 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 connecting member having flexibility and electrical conductivity.

6. The stator, 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 connecting member having flexibility and electrical conductivity.

7. The direction in which the rotation shaft extends is defined as a front-rear direction, 3. The marine generator according to claim 1, wherein the liner is located at the front end and / or the rear end of the frame.

8. The marine generator according to claim 1 or 2, wherein the liner has a shape protruding in the radial direction.

9. 3. The marine generator according to claim 1, wherein the length over which the liner extends from the frame in the radial direction is longer than the length over which the permanent magnet extends from the frame in the radial direction.

10. 3. The marine generator according to claim 1, further comprising a spacer inserted between the clamp and the liner.

11. A marine generator comprising a stator and a rotor and attached to an engine, The stator, 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 shape centered on a central portion of a rotation shaft on which the rotor rotates; A permanent magnet attached to the frame; Including, The rotor rotates in response to the rotation of the engine to generate electricity, The bottom portion is provided with one or more holes and a mounting hole for mounting the rotor to the engine; The hole is provided on an outer circumferential side of the mounting hole, the stator includes a rotor fixing portion for fixing the rotor, The marine generator, wherein the rotor includes a stator fixing portion for fixing the stator.

12. 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 exhaust of cooled gas to the stator and the rotor; The marine generator according to claim 1 or 2, comprising:

13. the stator includes a stator cover portion having an opening through which gas can be taken in or exhausted from the outside, and a cover portion covering the opening, The cooler unit includes a cooler cover portion installed at an opening capable of taking in or discharging gas from the outside, The marine generator according to claim 12, wherein the cover portion and the cooler cover portion are removable.

14. A method for mounting a marine generator having a stator and a rotor to an engine, comprising the steps of: The stator, a stator mounting portion attached to the engine; A stator coil; a clamp extending radially toward the center of a rotating shaft on which the rotor rotates; Including, The rotor is a bottom portion attached to the engine; A frame portion having a cylindrical shape centered on the axial center portion; A permanent magnet attached to the frame; a liner attached to the frame and extending in the radial direction away 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 in which 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

15. A method for transporting a marine generator including a stator and a rotor, comprising the steps of: The stator, a stator mounting portion that is attached to the engine; A stator coil; a clamp extending radially toward the center of a rotating shaft on which the rotor rotates; Including, The rotor is a bottom portion attached to the engine; A frame portion having a cylindrical shape centered on the axial center portion; A permanent magnet attached to the frame; a liner attached to the frame and extending in the radial direction away 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, inserting a spacer between the liner and the clamp; a transport step of transporting the marine generator after the inserting step; A transportation method comprising:

16. 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 stationary part and the rotor stationary part using a fixing member; A transporting step transports the marine generator after the inserting step and the fixing step.

16. The method of claim 15.

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