JP2001238380A - Rotor of rotating machine and manufacturing thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity and reduce the manufacturing cost. SOLUTION: This rotor 100 and the manufacturing method thereof comprise an internal magnetic sheet track body 10 fitted on a rotating shaft 2, external magnetic sheet stack 20 disposed on the outside thereof, a plurality of permanent magnets 30 inserted between the internal and external magnetic sheet stacks, and a plurality of clearances storing non-magnetic substances 40, where both axial end surfaces of the internal magnetic sheet stack 10, each of the permanent magnets 30, each of the external magnetic sheet stacks 20, and each of the clearances are covered with the layers of the molten non-magnetic substance 40, and each of the clearance is filled with the non-magnetic substance 40, so as to be integrated with each of the layers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor for a rotating machine which is a generator or an electric motor, and more particularly, to an inner magnetic plate laminate having a rotating shaft mounted thereon, and at least an inner magnetic plate laminate and an outer magnetic plate laminate. The present invention relates to a rotor of a rotating machine having a plurality of permanent magnets inserted between a body and a plurality of gaps capable of accommodating a nonmagnetic material, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Generally, an IPM (Interrior Pe) is used.
A first typical example of the rotor of the above-described embodiment, which is called "management magnet", has a magnetic plate laminate formed by laminating electromagnetic steel plates. The magnetic plate laminate has a substantially cylindrical shape, and a through hole is formed in the center thereof. In the magnetic plate laminate, six identical through-holes having a rectangular cross section and having an elongated cross section are arranged so as to form a substantially hexagonal shape at intervals in the circumferential direction. At the circumferential position corresponding to each of the six through holes of the magnetic plate laminate,
From the outer peripheral surface of the magnetic plate laminate toward the inside in the radial direction, 6
Notches are formed that extend so as to divide the meat portion between each of the through holes into two in the circumferential direction (the total number of the notches is six). A rotating shaft is integrally attached to the through hole in the center,
A permanent magnet is inserted into each of the six through holes.

[0003] A second typical example of the above-described rotor has a magnetic plate laminated body formed by laminating electromagnetic steel plates.
The magnetic plate laminate has a substantially cylindrical shape, and a through hole is formed in the center thereof. The magnetic plate laminate is provided with four rectangular through-holes having a long and narrow cross section and arranged in a substantially square shape at intervals in the circumferential direction. At the circumferential position corresponding to each of the four through-holes of the magnetic plate laminate, the magnetic plate laminate is radially outwardly spaced from the mutually adjacent end of each of the four through-holes in the circumferential direction. A pair of through-holes extending to the vicinity of the radially outer end of the magnetic plate laminate are formed (four pairs of through-holes are formed in total). A rotary shaft is integrally mounted on the central through hole, and a permanent magnet is inserted into each of the four through holes. A nonmagnetic member made of austenitic stainless steel or the like is inserted into each of the four pairs of through holes.

[0004] A third typical example of the above-described rotor has an inner magnetic plate laminate formed by laminating electromagnetic steel plates. The inner magnetic plate laminate has four sides that are substantially square when viewed in the axial direction, and has chamfers formed at four corners. A through hole is formed at the center of the inner magnetic plate laminate. 4 on the radially outer side of the inner magnetic plate laminate
Outer magnetic plate laminates are arranged. Each of the outer magnetic plate laminates has a radially inner end disposed radially outward of each of the sides of the inner magnetic plate laminate with a radial clearance therebetween and is disposed with a circumferential clearance therebetween. ing.
Four permanent magnets are inserted into each of the radial gaps with a circumferential gap therebetween. Each of the circumferential gaps between each of the permanent magnets and between each of the outer magnetic plate laminates is arranged to align with each other at corresponding corners of the inner magnetic plate laminate to form a corner gap. . In each of the corner gaps, a permanent magnet is inserted leaving a gap radially inward. A nonmagnetic member made of austenitic stainless steel or the like is inserted into each of the remaining gaps.

[0005]

Among the conventional rotors constructed as described above, the first and second typical examples are generally constructed by fitting an electromagnetic steel sheet to a rotating shaft one by one. And laminating while adhering to each other, then caulking or welding the outer peripheral part to form a magnetic plate laminated body integral with the rotating shaft, and then attach the permanent magnet to the corresponding through hole with an adhesive It was formed by insertion. For this reason, the assembling work is complicated, requires a lot of assembling work time and a great deal of labor, and is poor in productivity. Also, the production cost increases.

In order to reduce magnetic shorts (magnetic leakage) as much as possible, as described above, in the first typical example, the outer peripheral portion of the electromagnetic steel plate corresponding to each of the permanent magnets, and thus the magnetic plate lamination By forming six notches in the outer peripheral part of the body, the magnetism between different poles was cut off.
However, if these notches are too small, the excess thickness of the magnetic steel sheet, and therefore of that part of the magnetic plate laminate (formed between each notch and the circumferential end of the circumferentially adjacent permanent magnet) Circumferential thickness) is excessively large,
The number of magnetic short-circuits increases, resulting in a decrease in performance. If the notch is excessively large, the excess thickness of the electromagnetic steel sheet, that is, the portion of the magnetic plate laminate is excessively small, and the strength at the time of high-speed rotation may be insufficient. Therefore, it has been difficult to design to satisfy both. In the second typical example, the number of parts is increased, the productivity is further reduced, and the production cost is further reduced as compared with the first typical example due to the insertion of four pairs of non-magnetic members. Get higher.

On the other hand, also in the third typical example, the assembling work is complicated for the same reason as in the first and second typical examples, requiring a lot of assembling work time and a great deal of labor, and increasing productivity. Poor. In the third typical example, as compared with the first typical example, the number of permanent magnets and the addition of the non-magnetic member increase the number of parts and further reduce the productivity. At the same time, the production cost increases. Further, the assembling work becomes more complicated due to the fact that the magnetic steel sheet is divided into four parts from the beginning, and the productivity is further reduced and the production cost is further increased.

The present invention has been made on the basis of the above-mentioned facts, and has as its object to simplify the assembling work as compared with the related art, to shorten the assembling work time and to reduce the burden of labor. As a result, it is an object of the present invention to provide a novel rotor for a rotating machine and a method for manufacturing the same, which can improve productivity and reduce manufacturing costs.

Another object of the present invention is to provide a novel rotor for a rotating machine and a method for manufacturing the same, which can reduce magnetic short circuits between different poles and easily ensure strength during high-speed rotation. That is.

Still another object of the present invention is to provide a novel rotor for a rotary machine and a method for manufacturing the same, which can significantly reduce the number of parts, thereby improving productivity and reducing manufacturing costs. It is.

Still another object of the present invention is to provide a novel rotor for a rotary machine and a method for manufacturing the same, which can easily ensure the required performance and durability of the rotary machine for a long period of time. It is.

Other objects and features of the present invention will become apparent from the following description of embodiments of a rotor of a rotating machine constructed according to the present invention and a method of manufacturing the same, with reference to the accompanying drawings. Would.

[0013]

According to one aspect of the present invention, an inner magnetic plate laminate mounted on a rotating shaft and an outer magnetic plate laminate disposed substantially radially outward of the inner magnetic plate laminate. Body, at least a plurality of permanent magnets inserted between the inner magnetic plate laminate and the outer magnetic plate laminate, and a plurality of gaps in which a non-magnetic material can be accommodated, the rotor of the rotating machine, The axial end surfaces of each of the magnetic plate laminate, each of the permanent magnets, each of the outer magnetic plate laminates, and each of the gaps are covered with a layer of fusible non-magnetic material, and each of the gaps is formed of the non-magnetic material. A rotor of a rotating machine is provided, which is packed so as to be integral with each of the layers.

According to another aspect of the invention, a substantially polygonal inner magnetic plate laminate mounted on a rotating shaft and having an even number of sides, and a radial gap radially outward of each of the sides. Outer magnetic plate laminates having the same number of outer magnetic plates as the sides and having radially inner ends arranged at intervals and having a circumferential gap therebetween, and having a circumferential gap at each of the radial gaps. And each of the circumferential gaps between each of the permanent magnets and between each of the outer magnetic plate laminates is aligned with each other at corresponding corners of the inner magnetic plate laminate. In the rotor of the rotating machine arranged so as to form a corner gap, each of the inner magnetic plate laminate, each of the permanent magnets, each of the outer magnetic plate laminate, and both axial end faces of the corner gap can be melted. Each of the corner gaps is covered by a layer of non-magnetic material and Rotating machine rotor, characterized in that, is filled so as to be integral with each of the layer by,
Is provided. At each of the corners of the inner magnetic plate laminate, a projection is formed radially outward and extending toward the corresponding corner gap, and each of the projections is circumferentially opposed to each other at the corresponding corner. It is preferably located between the circumferential ends of the permanent magnets. Each of the protrusions is positioned so as to extend a corresponding radial center of the corner gap to a radially outer end of the corner gap and divide the corner gap into two in the circumferential direction. preferable. Each of the outer magnetic plate laminates, a non-magnetic material filled in each of the corner gaps, and a radially outer end face of each of the non-magnetic material layers,
Preferably, it is located on a substantially common circular outer peripheral surface, said circular outer peripheral surface being formed from a cutting surface. At each of the corners of the inner magnetic plate laminate, a groove extending inward in the radial direction is formed, and in each of the grooves, a circumferential width of a radially inner end portion is a region radially outer than the inner end portion. Is formed wider than the circumferential width of each of the corner gaps, and the circumferential width of the radially outer end in each of the corner gaps is formed wider than the circumferential width of the radially inner region than the outer end. Preferably, each of the gaps formed is aligned with each of the corner gaps to form a part of each of the corner gaps.

According to yet another aspect of the invention, a substantially polygonal inner magnetic plate laminate mounted on a rotating shaft and having an even number of sides, and radially outwardly of each of the sides. The same number of outer magnetic plate laminates as the sides and having radially inner ends arranged with a gap and arranged with a circumferential gap therebetween, and a circumferential gap in each of the radial gaps And a plurality of permanent magnets inserted in the circumferential direction, and each of the circumferential gaps between each of the permanent magnets and between each of the outer magnetic plate laminates is aligned with each other at corresponding corners of the inner magnetic plate laminate. Inner magnetic plate laminated body in a rotor of a rotating machine in which a permanent magnet is inserted while leaving a part of the gap radially inward in each of the corner gaps. , Each of the permanent magnets, each of the outer magnetic plate laminates and a part of the gap The two axial end faces are covered with a layer of fusible non-magnetic material, and a part of the gap is filled with the non-magnetic material integrally with each of the layers. Machine rotor is provided.

According to still another aspect of the present invention, a rotary shaft is set in accordance with the axis of a molding die having a cylindrical portion, and a mounting hole is formed in the axis and an even number of sides are provided. The inner magnetic plate of the upper polygonal shape is laminated while being inserted into the rotating shaft through the mounting hole, and between the circular outer peripheral end, the same number of radial inner ends as the sides and the circumferential ends of the inner ends. An outer magnetic plate main body formed of a through hole having a groove which is open at one end radially inward and the other end of which is closed leaving a bridging portion with the outer peripheral end, is fitted into the cylindrical portion. By laminating, a radial gap is formed between each of the inner ends and the corresponding side, and a corner gap is formed between each of the grooves and the corresponding corner of the inner magnetic plate. Forming an inner magnetic plate laminate and an outer magnetic plate body laminate in the cylindrical portion; After inserting the permanent magnet, the molten non-magnetic material is cast, and the inner end of each of the inner magnetic plate laminate, the permanent magnet, the outer magnetic plate main body laminate, and each of the corner gaps are removed. While covering with a layer of magnetic material, each of the corner gaps is filled so as to be integrated with each of the layers, and after release,
A method for manufacturing a rotor of a rotating machine, characterized in that the outer peripheral ends of the outer magnetic plate body laminate and the non-magnetic material are cut to cut off each of the bridging portions.

According to still another aspect of the present invention, a rotary shaft is set in accordance with an axis of a mold having a cylindrical portion, and a mounting hole is formed in the axis and an even number of sides are provided. The inner magnetic plate of the upper polygonal shape is laminated while being inserted into the rotating shaft through the mounting hole, and between the circular outer peripheral end, the same number of radial inner ends as the sides and the circumferential ends of the inner ends. An outer magnetic plate main body formed of a through hole having a groove which is open at one end radially inward and the other end of which is closed leaving a bridging portion with the outer peripheral end, is fitted into the cylindrical portion. By laminating, a radial gap is formed between each of the inner ends and the corresponding side, and a corner gap is formed between each of the grooves and the corresponding corner of the inner magnetic plate. Forming an inner magnetic plate laminate and an outer magnetic plate body laminate within the cylindrical portion, After inserting a magnet and inserting a permanent magnet into each of the corner gaps leaving a part of the gap radially inward, and then casting a molten non-magnetic material, the inner magnetic plate laminate, permanent magnet Each of the magnets, the outer magnetic plate main body laminate, and the axial end faces of each of a part of the gap are covered with the nonmagnetic material layer, and each of the gaps is integrated with each of the layers. Filling and releasing, and cutting each outer edge of the outer magnetic plate main body laminate and the non-magnetic material to cut off each of the bridging portions. You.

According to still another aspect of the present invention, a rotary shaft is set in accordance with the axis of a mold having a cylindrical portion, and a mounting hole formed in the axis, a circular outer peripheral end, and an even number A radial gap formed to form a substantially regular polygon, and a radial bridge formed to extend in a radial direction at each corner of the radial gap. While inserting the magnetic plate having a pair of circumferential gaps formed to extend in the radial direction and forming a circumferential bridging portion between the magnetic plate and the circular outer peripheral end through the mounting hole, And a magnetic plate laminated body is formed by stacking while fitting the circular outer peripheral end to the cylindrical portion, and after inserting a permanent magnet into each of the radial gaps, a molten non-magnetic material is cast,
Each of the magnetic plate laminate, each of the permanent magnets, and both ends in the axial direction of the circumferential gap are covered with a layer of the non-magnetic material, and each pair of the circumferential gaps is filled so as to be integrated with each of the layers. ,
A method for manufacturing a rotor of a rotating machine, characterized in that after release, the outer peripheral edges of the magnetic plate laminate and the non-magnetic material are cut to cut off each of the circumferential bridging portions.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in more detail with reference to the accompanying drawings. Referring to FIGS. 1 to 3, a rotor 100 applied to a rotating machine that is a generator or an electric motor includes an inner magnetic plate laminate 10 on which a rotating shaft 2 is mounted, and a plurality of (six in the embodiment). ) And a plurality (six in the embodiment) of the outer magnetic plate laminate 20.
It is composed of a permanent magnet 30 and a non-magnetic material 40 that can be melted.

Hereinafter, the configuration (completed configuration) of the rotor 100 according to the present invention will be specifically described. The inner magnetic plate laminate 10 is configured by laminating a plurality of inner magnetic plates 11 having substantially the same configuration as each other. The inner magnetic plate 11 is made of an electromagnetic steel plate, in this embodiment, a silicon steel plate, has an even number of sides 12 each extending linearly, and is formed to substantially form a regular polygonal shape. In the embodiment, the inner magnetic plate 11 has six sides 12 and is formed to have a substantially regular hexagonal shape. Projections 13 are formed at six corners of the inner magnetic plate 11 to extend radially outward.
A mounting hole 14 in which the rotating shaft 2 is mounted is formed in the axial center of the inner magnetic plate 11. The inner magnetic plate laminate 10 is formed by laminating a plurality of the inner magnetic plates 11 configured as described above, and the mounting hole 1 of the inner magnetic plate laminate 10 is formed.
The rotary shaft 2 is fitted and mounted on 4.

Each of an even number (six in the embodiment) of outer magnetic plate laminates 20 having substantially the same configuration mutually has a plurality of outer magnetic plates 21 having substantially the same configuration. It is configured by stacking. The outer magnetic plate 21 is made of an electromagnetic steel plate, in this embodiment, a silicon steel plate, and has a radially outer end 22 having an arc shape, a radially inner end 23 extending linearly, and both circumferential ends 24. are doing. Outer magnetic plate 21 configured as above
Are laminated to form the outer magnetic plate laminate 20. Each of the outer magnetic plate laminates 20 is disposed with a radial gap substantially radially outward and a circumferential gap in the circumferential direction of the inner magnetic plate laminate 10. That is, each radially inner end 23 of the outer magnetic plate laminate 20 is connected to the corresponding side 12 of the inner magnetic plate laminate 10.
Are arranged so as to face each other in parallel with a radial gap, and to face each other with a circumferential gap in the circumferential direction. Each of the radially outer ends 22 is positioned on an imaginary circle having a common axis with the rotating shaft 2, and each of the circumferential gaps of the inner magnetic plate laminate 10 is formed at each of the circumferential ends 2.
4 and are arranged at circumferential positions aligned with each of the corners of the inner magnetic plate laminate 10 and thus with each of the protrusions 13.

In each of the radial gaps between each radially inner end 23 of the outer magnetic plate laminate 20 and the corresponding side 12 of the inner magnetic plate laminate 10, for example, Nd-Fe-B
A permanent magnet 30 of the system is inserted. Each of the permanent magnets 30 is formed in an elongated substantially rectangular parallelepiped shape. Each of the circumferential gaps formed between each of the permanent magnets 30 and each of the circumferential gaps formed between each of the outer magnetic plate laminates 20 are mutually separated at corresponding corners of the inner magnetic plate laminate 10. Aligned to form a corner gap. The total number of the corner gaps is six. The protrusions 13 of the inner magnetic plate laminate 10 are positioned in each of the corner gaps. The radially outer end of the projection 13 is located radially inward of the radially outer end of the circumferential end of the permanent magnet 30 that faces each other in the circumferential direction. The permanent magnet 30
Are formed such that the respective magnetic poles are oriented in the radial direction, and the radially outer magnetic poles are different from each other between the circumferentially adjacent permanent magnets 30, and thus the radially inner magnetic poles are Are arranged so as to have different polarities from each other.

The axial end faces of each of the inner magnetic plate laminate 10, the permanent magnet 30, the outer magnetic plate laminate 20, and each of the corner gaps are covered with a layer of a nonmagnetic material 40 that can be melted. And each of the corner gaps is
To be integrated with each of the layers. The non-magnetic material 40 is made of a non-magnetic material such as aluminum, an aluminum alloy or a zinc alloy. The non-magnetic material 40 is formed by rotating the rotating shaft 2, the inner magnetic plate laminate 10, the permanent magnets 30, and the outer magnetic plate laminates 20 by die casting as described below. , Except for the radially outer end face. Each of the inner magnetic plate laminate 10 and the permanent magnet 30 is completely embedded in each of the outer magnetic plate laminate 20 and the non-magnetic material 40. Each of the inner magnetic plate laminate 10, each of the permanent magnets 30, each of the outer magnetic plate laminates 20, and each of the layers of the non-magnetic material 40 covering both axial end surfaces of the corner gap, and the corner gap And the non-magnetic material 40 filled with each of the main body 1 of the rotor 100 has a substantially cylindrical shape.
02. Both end surfaces in the axial direction of the main body 102 are formed of the non-magnetic material 40, and the outer peripheral surface is formed of the outer magnetic plate laminate 2.
0 and each radially outer end surface of the non-magnetic material 40 filled in the corner gap.

As described above, the rotor 100 of the rotating machine according to the present invention includes the inner magnetic plate laminate 10, the permanent magnets 30, the outer magnetic plate laminates 20, and each of the axial gaps of the corner gap. Since the surface is covered by a layer of a non-magnetic material 40 that can be melted and each of the corner gaps is filled with the non-magnetic material 40 so as to be integrated with each of the layers, the inner magnetic plate laminate 10 Each of the magnets 30 and each of the outer magnetic plate laminates 20 can be integrally cast with the non-magnetic material 40 except for the outer peripheral surface of each of the outer magnetic plate laminates 20. The nonmagnetic material 40 can be integrally formed by casting. For this reason, as in the past,
Complicated work such as caulking, welding, bonding, etc. is not required, the assembling work is easier than before, and the assembling work time is shortened and labor is reduced. Enables reduction of manufacturing costs. Further, the notch as in the conventional rotor becomes unnecessary, and the notch portion is filled with the non-magnetic material 40, so that it is easy to reduce the magnetic short circuit between different poles and to secure the strength at the time of high speed rotation. To make it possible. Furthermore, since each of the permanent magnets 30 is completely covered (embedded) by each of the outer magnetic plate laminates 20 and the non-magnetic material 40, when applied to a rotating machine that is a generator or a motor, Even if forced cooling is performed by providing ventilation holes in the case of the rotating machine and supplying air into the case by a fan arranged on the rotating shaft, each of the permanent magnets 30 is completely removed from dust such as iron powder or water. Can be protected. As a result, the required performance and durability of the rotating machine can be easily ensured for a long period of time.

In the rotor 100, each of the corners of the inner magnetic plate laminate 10 is formed with a projection 13 extending toward the corner gap corresponding to the outer side in the radial direction. Since it is located between the circumferential ends of the permanent magnets 30 that face each other at the corresponding corners in the circumferential direction, the strength at the time of high-speed rotation can be improved. In practice, there may be other embodiments in which each of the projections 13 is not formed as long as the strength at the time of high-speed rotation can be ensured.

Next, a method of manufacturing the rotor 100 will be described. Referring to FIG. 4, the above-described inner magnetic plate 11
Can be formed by punching a silicon steel plate (flat plate) using a press machine (not shown). Both ends of each of the protrusions 13 in the circumferential direction, when viewing the inner magnetic plate 11 in the axial direction, form an imaginary straight line L extending in the radial direction through an axis O of the mounting hole 14 and a corner (not shown) of a regular hexagon. It is formed so as to extend on two virtual straight lines L1 passing through the axis O and extending in the radial direction at an angle. Therefore, protrusion 1
The circumferential ends of each of the three are inclined at radially symmetrical positions with respect to the imaginary straight line L such that the circumferential width thereof is widened toward the outside in the radial direction. Further, each radially outer end of the projection 13 is formed to be orthogonal to the virtual straight line L (that is, to extend in a tangential direction).

Each of the outer magnetic plate laminates 20 described above, when completed as a molded rotor 100, has discontinuous independent members circumferentially separated from each other as described above. Before molding, each of the corner gaps filled with the fusible non-magnetic material 40 has a radially outer end formed in an arc-shaped narrow bridging portion 21.
The outer magnetic plate body laminated body 220 formed by stacking a single outer magnetic plate body 210 integrally formed so that the entire outer peripheral end thereof forms a continuous circular shape by being connected by 7 and FIG. 8). Then, the outer magnetic plate laminate 20 is separated into each of the outer magnetic plate laminates 20 as described above by cutting after molding, which will be described later.

Referring to FIG. 5, an outer magnetic plate main body 210 formed by punching a silicon steel plate (flat plate) by a press machine (not shown) has a circular outer peripheral end 211.
(Six in the embodiment) radial inner ends 23 having the same number as the sides 12 of the inner magnetic plate 11.
And a groove 213 formed between the circumferential ends of the inner ends 23, one end of which is open radially inward and the other end of which is closed leaving a bridging portion 212 between the inner end 23 and the outer peripheral end 211. Has a through hole 214. Each of the inner ends 23 extends in a straight line, respectively, and is arranged to substantially form a side of a regular hexagon, and a groove 213 is formed in each of the corners of the regular hexagon.
Is arranged. The center of the regular hexagon, that is, the center of the through hole 214 is positioned so as to coincide with the axis O of the outer magnetic plate main body 210. Each circumferential end of the groove 213 extends in the radial direction through the axis O of the outer magnetic plate body 210 and the not-shown corner of the regular hexagon when the outer magnetic plate body 210 is viewed in the axial direction. The straight line L is formed so as to extend on two imaginary straight lines L1 extending in the radial direction through the axis O with the straight line L interposed therebetween at an equal angle, and each radially outer end of the groove 213 has a circular outer peripheral end. It is formed in an arc shape parallel to 211. Each of these straight lines L and L1 is such that the axis O of the outer magnetic plate body 210 is
Are defined on the inner magnetic plate 11 so as to coincide with the straight lines L and L1, respectively. A circular portion indicated by a two-dot chain line 22 represents a planned cutting surface (planned cutting line) to be cut by a cutting process described later. This cutting allowance is defined so that at least each of the bridging portions 212 of the outer magnetic plate main body 210 is completely cut off.

FIG. 6 schematically shows the assembly of the rotor 100 and the structure of the molding die 300. The assembling and forming die 300 has a cylindrical portion 302 having a bottom wall 301 at the lower end.
And a lid type 303 that can removably close the open end of the cylindrical portion 302. A cap-shaped gap setting member 304 is inserted into the upper surface of the bottom wall 301 in the cylindrical portion 302. A through hole (not shown) into which the rotating shaft 2 is fitted and a pouring hole for injecting the molten non-magnetic material 40 are formed in the axial center of the bottom wall 301. A through hole 305 into which the rotating shaft 2 is fitted is formed in the axial center of the lid mold 303. The gap setting member 304 is formed of the same material as the fusible non-magnetic material 40 that is cast as described below, and has six through holes 306 at its top wall at circumferential intervals. Is formed.

Referring to FIGS. 6 to 8, in the assembling and forming die 300 configured as described above, the rotor 100
Is fitted in a through hole (not shown) of the bottom wall 301 so as to be aligned with the axis of the assembling and forming mold 300. The upper end of the rotating shaft 2 is a cylindrical portion 3
02 is projected upward beyond the open end of 02, and the lower end is projected downward from the bottom wall 301. Next, the inner magnetic plate 11 is inserted into the cylindrical portion 302 while being inserted into the rotating shaft 2 through the mounting hole 14, and the gap setting member 3 is inserted.
An appropriate number of sheets are laminated on the upper surface of the substrate 04. This lamination work
Simply inserting the inner magnetic plate 11 into the rotating shaft 2 and stacking the inner magnetic plate 11 can be performed easily and reliably. Thereafter, an appropriate number of the outer magnetic plate main bodies 210 are laminated on the upper surface of the gap setting member 304 while being fitted to the inner peripheral surface of the cylindrical portion 302. This laminating operation is also performed on the outer magnetic plate body 2.
10 is simply inserted along the inner peripheral surface of the cylindrical portion 302 and stacked, and this can be performed easily and reliably. The outer magnetic plate main body 210 is disposed so that the through hole 214 covers the entire radially outer side of the inner magnetic plate 11 from the radially outer side, and each of the inner ends 23 has a radial direction with respect to the corresponding side 12 of the inner magnetic plate 11. The grooves 213 are opposed to each other in parallel with a radial gap on the outside, and the circumferential positions of the grooves 213 are aligned with the corresponding corners (projections 13) of the inner magnetic plate 11 so that the corners are radially outward of the corners. It is arranged so that the gap 230 is formed. It goes without saying that the inner magnetic plate 11 and the outer magnetic plate main body 210 are each formed in a shape and a size that allow the above-described arrangement in advance. It is preferable to form the outer diameter of the outer magnetic plate main body 210 to be substantially the same as (slightly smaller than) the inner diameter of the cylindrical portion 302 in order to prevent backlash. In this embodiment, the order is defined such that a plurality of inner magnetic plates 11 are stacked and then a plurality of outer magnetic plate main bodies 210 are stacked radially outside the inner magnetic plate 11. Holds even if the order is By repeating the lamination of the inner magnetic plate 11 and the lamination of the outer magnetic plate body 210 a plurality of times, the inner magnetic plate laminate 10 and the outer magnetic plate body laminate 220 having a predetermined axial thickness are formed in the cylindrical portion 302. I do.

Next, each of the sides 12 of the inner magnetic plate laminate 10 and the corresponding inner end 23 of the outer magnetic plate body laminate 220
The permanent magnets 30 are inserted into the radial gaps between the two (see FIG. 8). Each of the permanent magnets 30 is inserted substantially closely into the corresponding gap. As described above, both ends in the circumferential direction of the protrusion 13 in each of the inner magnetic plates 11 are inclined so that the circumferential width thereof becomes wider toward the outside in the radial direction. Since both ends are positioned so as to be substantially in close contact with the inclined surface at the circumferential end of the corresponding projection 13, they are formed to have an inclination corresponding to the inclination. Therefore, the cross section of each of the permanent magnets 30 is substantially trapezoidal. The axial length of each of the permanent magnets 30 is formed so as to substantially match the axial thickness of the inner magnetic plate laminate 10 and the outer magnetic plate body laminate 220. Each of the sides 12 of the inner magnetic plate laminate 10 and the corresponding inner end 23 of the outer magnetic plate body laminate 220
The permanent magnets 30 are inserted into the radial gaps between the outer peripheral surfaces of the protrusions 13 present at the corners of the inner magnetic plate laminate 10 and the respective circumferential ends of the permanent magnets 30. A corner gap 230 (see FIG. 8) is ultimately formed between each of the end faces facing the first magnetic member and the corresponding groove 213 of the outer magnetic plate body laminate 220. The number of the corner gaps 230 is six in total. Corner gap 230
Are substantially trapezoidal when viewed in the axial direction. The radially outer end of each of the protrusions 13 on each of the inner magnetic plates 11 is positioned radially inward from the radially outer end of the circumferential end of the permanent magnet 30 that is circumferentially opposed to each other. Each of the corner gaps 230 has six through-holes 306 formed in the top wall of the gap setting member 304 set on the upper surface of the bottom wall 301 of the assembling and molding die 300.
Is located at a position corresponding to each of.

As described above, the inner magnetic plate laminate 1
After each of the outer magnetic plate main body laminate 220 and the permanent magnet 30 is set in the cylindrical portion 302 of the assembling and forming die 300, the open end of the cylindrical portion 302 is closed by the lid die 303. A predetermined axial gap is provided between the lid mold 303 and each of the inner magnetic plate laminate 10, the permanent magnet 30, and the axial upper end surface (substantially on the same plane) of the outer magnetic plate body laminate 220. Is provided. The axial gap is the axial lower end surface of each of the inner magnetic plate laminate 10, the permanent magnets 30, and the outer magnetic plate body laminate 220 (substantially on the same plane).
And the bottom wall 301 are defined substantially the same as the axial gap set by the gap setting member 304. Next, the melted non-magnetic material 40 is mixed with the inner magnetic plate laminate 1.
0, each of the permanent magnets 30, the outer magnetic plate main body laminate 22
0 and both end faces in the axial direction of the corner gap 230 are covered with a layer of the non-magnetic material 40, and each of the corner gaps 230 is filled so as to be integrated with each of the layers (by casting). ), The rotating shaft 2, the inner magnetic plate laminate 10, the permanent magnets 30, and the outer magnetic plate main laminate 220 are integrally cast except for a part of the outer peripheral surface of the outer magnetic plate main laminate 220.

More specifically, the assembling and molding die 300
The molten non-magnetic material 40 is poured from a pouring opening (not shown) formed on the bottom wall 301 of FIG. Non-magnetic material 40 melted
Are axial gaps between the bottom wall 301 and the gap setting member 304, each of the through holes 306 of the gap setting member 304, each of the corner gaps 230, the lid mold 303, and the inner magnetic plate laminate 10, The axial gap between each of the permanent magnets 30 and the upper end surface of the outer magnetic plate main body 220 in the axial direction is caused to flow in the order described above, and each of them is filled. The lid mold 303 is provided with appropriate air bleeding means, but details are omitted. The molten non-magnetic material 40 filled in the assembling and forming mold 300 is pressed by a known pressing means to perform die casting. The gap setting member 304 is substantially integrally cast with the melted non-magnetic material 40. Since the gap setting member 304 is made of the same material as the melted non-magnetic material 40, there is no problem. The intermediate product of the rotor 100, which is formed by substantially casting the non-magnetic material 40 in a molten state in this way, is removed from the assembly and forming mold 300 after a predetermined time has elapsed (release). After cooling, the outer magnetic plate body laminate 2
The outer peripheral surface of the nonmagnetic material 20 and the layers of the nonmagnetic material 40 on both sides in the axial direction are cut around the axis of the rotating shaft 2 to cut off each of the bridge portions 212 of the outer magnetic plate body laminate 220.

By the above-mentioned cutting process, each of the corner gaps 230 on the radially inner side of each of the bridging portions 212 is filled and the outer side in the radial direction is initially covered with each of the bridging portions 212 at the time of molding. Each of the members 40 will be exposed on the outer peripheral surface. Further, the outer magnetic plate main body laminated body 220 composed of the laminated body of the outer magnetic plate main bodies 210 is formed into six outer magnetic plate laminated bodies 20 separated from each other in the circumferential direction by the above-described cutting. The radially outer end faces of each of the outer magnetic plate laminates 20, the non-magnetic material 40 filled in each of the corner gaps 230, and each of the layers of the non-magnetic material 40 on both sides in the axial direction have a substantially common circular outer periphery. Located on the surface 22, the circular outer peripheral surface 22 will be formed from the cutting surface. This cutting surface defines a radially outer end (outer end face) 22 of each of the discrete and independent outer magnetic plate laminates 20 shown in FIG. Next, if necessary, both sides in the axial direction of the intermediate product of the rotor 100 are cut. Next, the rotor 100 is completed by rotating the rotor 100 (balancing).

According to the method of manufacturing the rotor 100 according to the present invention, the inner magnetic plate 11 is inserted into the rotating shaft 2 set on the cylindrical portion 302 of the assembling and forming die 300 through the mounting hole 14. Laminated and outer magnetic plate body 210
Are laminated while being fitted to the cylindrical portion 302, and a radial gap is formed between each of the inner ends 23 of the outer magnetic plate body 210 and the corresponding side 12 of the inner magnetic plate 11, and the outer magnetic plate body 210 is A corner gap 230 is formed between each of the grooves 213 and a corresponding corner of the inner magnetic plate 11 so that the inner magnetic plate laminate 20 and the outer magnetic plate body laminate 22 are formed in the cylindrical portion 302.
0, and after inserting the plurality of permanent magnets 30 into each of the radial gaps, the molten non-magnetic material 40 is separated from the inner magnetic plate laminate 20, each of the permanent magnets 30, and the outer magnetic plate body laminate 220 By covering both end faces in the axial direction of each of the corner gaps 230 with a layer of the non-magnetic material 40, and filling each of the corner gaps 230 with each of the layers (by casting). , Rotating shaft 2, inner magnetic plate laminate 10,
Each of the permanent magnets 30 and the outer magnetic plate body laminate 220
, Except for a part of the outer peripheral surface of the outer magnetic plate main body laminate 220, and after being integrally cast and released, the outer magnetic plate main body laminate 2
The rotor 100 can be manufactured by cutting the outer peripheral ends of the nonmagnetic material 20 and the nonmagnetic material 40 to cut off each of the bridging portions 212 of the outer magnetic plate main body 210. as a result,
Complex work such as caulking, welding, bonding, etc. as in the past is not required, and the assembly work is easier than in the past,
Then, the assembling work time is shortened and the burden of labor is reduced, and as a result, it is possible to improve productivity and reduce manufacturing costs.

The inner magnetic plate 11 is laminated on the rotating shaft 2 while being inserted through its mounting hole.
The inner magnetic plate laminated body 20 and the outer magnetic plate main body laminated body 220 can be formed in the cylindrical portion 302 by laminating the inner magnetic plate and the inner magnetic plate while fitting the inner magnetic plate to the inner peripheral surface of the cylindrical portion 302. As a result, the assembly work time is shortened and the burden of labor is reduced. In particular, when the rotor 100 is completed, each of the outer magnetic plates 21 separated from each other is integrally formed as the outer magnetic plate main body 210 at the time of assembling, so that the number of parts is reduced, and the assembling operation is performed as described above. Is facilitated. After forming the inner magnetic plate laminate 10 and the outer magnetic plate main body laminate 220 in the cylindrical portion 302 and assembling each of the permanent magnets 30, the nonmagnetic material 40
Since the intermediate product of the rotor 100 can be formed by casting each member by the casting according to the above, the manufacturing is totally simplified, the manufacturing time is shortened, and the burden of labor is reduced.

Further, the notch as in the conventional rotor becomes unnecessary, and the notch portion is filled with the non-magnetic material 40, so that a magnetic short circuit between different poles can be reduced and the strength at the time of high-speed rotation can be secured. The rotor 100 can be manufactured. Furthermore, it is possible to manufacture the rotor 100 in which each of the permanent magnets 30 is completely covered by each of the outer magnetic plate laminates 20 and the non-magnetic material 40,
When the rotor 100 is applied to a rotating machine that is a generator or an electric motor, even if forced cooling is performed by providing a ventilation hole in the case of the rotating machine and supplying air into the case by a fan arranged on the rotating shaft. , Each of the permanent magnets 30 can be completely protected from dust such as iron powder or water. As a result, the required performance and durability of the rotating machine can be easily ensured for a long period of time.

FIG. 9 shows a rotor 1 of a rotating machine according to the present invention.
The other embodiments of the inner magnetic plate 11 and the inner magnetic plate laminate 10, the outer magnetic plate body 210 and the outer magnetic plate body laminate 220, and the permanent magnet 30, which constitute another embodiment of the first embodiment, respectively, Cylindrical part 302 of assembling and forming die 300
It is shown inserted inside. Both circumferential ends of the protrusions 13 on the inner magnetic plate 11 are
When viewed in the axial direction, two imaginary straight lines L extending in the radial direction through the axis O of the mounting hole 14 and the not-shown corner of the regular hexagon are interposed at regular intervals and extend in parallel in the radial direction. Are formed so as to extend on the virtual straight line L2. Accordingly, both ends in the circumferential direction of the projection 13 extend linearly outward in the radial direction at positions symmetrical in the circumferential direction with respect to the virtual straight line L. Other configurations of the inner magnetic plate 11 and the inner magnetic plate laminate 10 are substantially the same as the inner magnetic plate 11 and the inner magnetic plate laminate 10 in the previous embodiment described with reference to FIGS. Further, both ends in the circumferential direction of the groove 213 in the outer magnetic plate main body 210 shown in FIG. 9 show the axis O of the outer magnetic plate main body 210 and the regular hexagon when the outer magnetic plate main body 210 is viewed in the axial direction. It is formed so as to extend on two virtual straight lines L2 passing through the axis O and extending in parallel in the radial direction with the virtual straight lines L extending in the radial direction through the corners not to be interposed at equal intervals. These straight lines L
And L2, the axis O of the outer magnetic plate body 210 is
It is defined so as to coincide with each of the straight lines L and L2 on the inner magnetic plate 11 in a state where it is positioned on the axis of the inner magnetic plate 11. Other configurations of the outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220 are shown in FIGS.
Are substantially the same as the outer magnetic plate main body 210 and the outer magnetic plate main body stacked body 220 in the previous embodiment described with reference to FIG. Each of the permanent magnets 30 has a slightly different inclination at both ends in the circumferential direction, and has a substantially trapezoidal cross section. The basic configuration is substantially the same as that of the previous embodiment. Corner gap 2
Each of the 30 has a substantially rectangular shape when viewed in the axial direction.

In the rotor 100 including the above members,
The configuration of the inner magnetic plate 11 and the inner magnetic plate laminate 10 and the configuration of the outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220 are the same as those of the previous embodiment described with reference to FIGS. Although it is slightly simplified, there is no difference in essential characteristics. Thus, as shown in FIG.
The operation and effect of the rotor 100 including the above members and the method of manufacturing the same are substantially the same as those of the previous embodiment described with reference to FIGS.

FIG. 10 shows a further embodiment of the rotor 100 of the rotating machine according to the present invention.
Each of the inner magnetic plate laminate 10, the outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220, and the permanent magnet 30 is further mounted in the cylindrical portion 302 of the assembling and forming die 300. Is shown in the state inserted. Each circumferential end of each of the protrusions 13 on the inner magnetic plate 11 is formed so as to extend radially outward at a right angle from the circumferential end of the corresponding side 12 when the inner magnetic plate 11 is viewed in the axial direction. . Inner magnetic plate 11 and inner magnetic plate laminate 10
Other configurations of the inner magnetic plate 11 and the inner magnetic plate laminate 1 in the previous embodiment described with reference to FIGS.
It is substantially the same as 0. The outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220 shown in FIG. 10 have substantially the same configuration as the outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220 shown in FIG. Also permanent magnet 3
Since the circumferential ends of each of the 0's are substantially brought into close contact with the circumferential ends of the corresponding projections 13, the cross section of each of the permanent magnets 30 is formed in a substantially rectangular shape. The radially outer ends of the circumferential ends of each of the permanent magnets 30 are located at the radially inner ends of the corresponding grooves 213 of the outer magnetic plate main body 210. In the rotor 100 including the above members,
Although the configuration of each of the permanent magnets 30 is simpler than the configuration of each of the permanent magnets 30 in the previous embodiment described with reference to FIGS. 1 to 8, it can be manufactured at a relatively low cost. However, there is no difference in the essential features in the overall configuration. Therefore, the operation and effect of the rotor 100 including each of the above-described members and the method of manufacturing the same shown in FIG. 10 are substantially the same as in the previous embodiment described with reference to FIGS. Description is omitted.

FIG. 11 shows an inner magnetic plate 11 constituting a further embodiment of the rotor 100 of the rotating machine according to the present invention.
Each of the inner magnetic plate laminate 10, the outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220, and the permanent magnet 30 is further mounted in the cylindrical portion 302 of the assembling and forming die 300. Is shown in the state inserted. Each of the protrusions 13 in the inner magnetic plate 11 and thus the inner magnetic plate laminate 10 is positioned at the radial center of the corresponding corner gap 230 at the radially outer end of the corner gap 230, that is, radially inward of the bridge 212. Extending to the end, corner gap 2
30 is positioned so as to be divided into two in the circumferential direction. Other configurations of the inner magnetic plate 11 and the inner magnetic plate laminate 10 are substantially the same as the inner magnetic plate 11 and the inner magnetic plate laminate 10 in the previous embodiment described with reference to FIGS. . The configuration of the outer magnetic plate main body 210 and the outer magnetic plate main body stacked body 220 and the configuration of each of the permanent magnets 30 are substantially the same as those shown in FIG. In the rotor 100 including the above members, each of the inner magnetic plates 11, and thus the protrusions 13 in the inner magnetic plate laminate 10, is positioned at the radial center of the corresponding corner gap 230 at the radial inner end of the bridging portion 212. It extends so as to divide the corner gap 230 into two in the circumferential direction, so that the strength at the time of high-speed rotation can be further improved as compared with any of the previous embodiments. Further, since each of the corner gaps 230 divided into two in the circumferential direction is filled with the non-magnetic material 40 in the same manner as in the previous embodiment,
The number of parts can be significantly reduced as compared with a conventional rotor in which a nonmagnetic member is inserted into each of the angular gaps 230 divided into two in the circumferential direction. As a result, productivity is improved and manufacturing cost is reduced. Enable reduction. As shown in FIG.
The essential features of the entire configuration of the rotor 100 including the above members are substantially the same as those of the above embodiment. Therefore, the rotor 1 shown in FIG.
The operation and effect of the method 00 and the method of manufacturing the same are substantially the same as those in the previous embodiment described with reference to FIGS.

In each of the embodiments described above with reference to FIGS. 1 to 11, the number of sides 12 of the inner magnetic plate 11 and the inner magnetic plate laminate 10 is six, In the embodiment, if the number is an even number, the number holds even if the number is four or eight or more. According to the number of sides 12 of the inner magnetic plate 11 and the inner magnetic plate laminate 10, the configuration of the outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220,
Needless to say, the number of the permanent magnets 30 and the like are defined.

FIG. 12 shows still another embodiment of the rotor 100 of the rotating machine according to the present invention. The rotor 100 includes an inner magnetic plate laminate 10 on which the rotating shaft 2 is mounted.
, Four outer magnetic plate laminates 20, and four permanent magnets 3
It is composed of zero, four other permanent magnets 50 and a non-magnetic material 40 that can be melted. The inner magnetic plate laminate 10 includes:
A plurality of inner magnetic plates 11 having substantially the same configuration
Are laminated. Inner magnetic plate 11
Is made of an electromagnetic steel sheet, in the embodiment, a silicon steel sheet,
Each is formed so as to have four sides 12 extending linearly and to form a substantially square shape. Chamfers 15 are formed at four corners of the inner magnetic plate 11 respectively. At the axial center of the inner magnetic plate 11, a mounting hole 14 in which the rotating shaft 2 is mounted is formed. The inner magnetic plate laminate 10 is formed by laminating a plurality of the inner magnetic plates 11 configured as described above. I have.

Each of the four outer magnetic plate laminates 20 having substantially the same configuration is formed by laminating a plurality of outer magnetic plates 21 having substantially the same configuration. The outer magnetic plate 21 is made of an electromagnetic steel plate, in this embodiment, a silicon steel plate, and has a radially outer end 22 having an arc shape and a radially inner end 23 extending linearly.
And both ends 24 in the circumferential direction. By laminating a plurality of outer magnetic plates 21 configured as described above, an outer magnetic plate laminate 20 is configured. Outer magnetic plate laminate 2
Each of the reference numerals 0 is disposed with a radial gap on the outer side in the radial direction of the inner magnetic plate laminate 10 and a circumferential gap on the circumferential direction. In other words, each radially inner end 23 of the outer magnetic plate laminate 20 is disposed so as to face in parallel with a corresponding side 12 of the inner magnetic plate laminate 10 with a radial gap therebetween and has a circumferential direction. They are arranged to face each other with a gap in the direction. Outer magnetic plate laminate 20
Are formed so as to extend with a constant circumferential width in the radial direction. Each of the radially outer ends 22 is positioned on an imaginary circumference having a common axis with the rotating shaft 2, and the circumferential gap of each of the inner magnetic plate laminates 10 is a corner of the inner magnetic plate laminate 10. , And thus in a circumferential position aligned with each of the chamfers 15.

Each of the radial gaps between each radially inner end 23 of the outer magnetic plate laminate 20 and the corresponding side 12 of the inner magnetic plate laminate 10 has, for example, Nd--Fe--B
A permanent magnet 30 of the system is inserted. Each of the permanent magnets 30 is formed in an elongated substantially rectangular parallelepiped shape. Each of the circumferential gaps formed between each of the permanent magnets 30 and each of the circumferential gaps formed between each of the outer magnetic plate laminates 20 are mutually separated at corresponding corners of the inner magnetic plate laminate 10. Aligned to form a corner gap. The total number of the corner gaps is four. The chamfers 15 of the inner magnetic plate laminate 10 are positioned facing each of the corner gaps. In each of the corner gaps, another permanent magnet 50 is inserted leaving a part of the gap radially inward. For example, the Nd—Fe—B-based permanent magnet 50 is formed in a slender, substantially rectangular parallelepiped shape.

The axial end faces of each of the inner magnetic plate laminate 10, the permanent magnets 30, the outer magnetic plate laminate 20, and each of the gaps are formed by a layer of a non-magnetic material 40 that can be melted. Each of the gaps is covered and partially filled with the non-magnetic material 40 to be integral with each of the layers. The non-magnetic material 40 sets the rotating shaft 2, the inner magnetic plate laminate 10, each of the permanent magnets 30, each of the permanent magnets 50, and each of the outer magnetic plate laminates 20 in the same manner as in the previous embodiment. Except for the radially outer end face of each of the magnetic plate laminates 20, they can be substantially integrally cast. Each of the inner magnetic plate laminate 10 and the permanent magnet 30 is completely embedded in each of the outer magnetic plate laminate 20 and the non-magnetic material 40. Each of the inner magnetic plate laminate 10 and the permanent magnet 30,
Non-magnetic material 4 covering each of the permanent magnets 50, each of the outer magnetic plate laminates 20, and both axial end surfaces of each of the gaps
0 and each of the non-magnetic materials 40 filling each of a part of the gap, the rotor 100 has a substantially cylindrical shape.
Of the main body 102 of FIG. Both ends in the axial direction of the main body 102 are formed of the nonmagnetic material 40, and the outer peripheral surfaces are formed by the respective radially outer end surfaces 22 of the outer magnetic plate laminate 20 and the respective radially outer end surfaces of the permanent magnets 50. Is done.

As described above, the rotor 100 of the rotating machine according to the present invention includes the inner magnetic plate laminate 10, each of the permanent magnets 30, each of the permanent magnets 50, each of the outer magnetic plate laminates 20, and one of the gaps. The axially opposite end faces of each of the portions are covered by a layer of fusible non-magnetic material 40 and each of a portion of the gap is filled with the non-magnetic material 40 to be integral with each of the layers. The inner magnetic plate laminate 10, each of the permanent magnets 30, each of the permanent magnets 50, and each of the outer magnetic plate laminates 20 are each laminated by the non-magnetic material 40 with the radially outer end face of each of the permanent magnets 50 and the outer magnetic plate laminate. Except for the outer peripheral surface of each of the bodies 20, it is possible to integrally cast them.
The nonmagnetic material 40 can be integrally formed by casting. For this reason, caulking, welding,
No complicated work such as bonding is required, the assembling work becomes simpler than before, and the assembling work time is shortened and the labor burden is reduced. As a result, productivity is increased and manufacturing costs are reduced. Enable. Furthermore, the permanent magnet 3 conventionally has both end faces in the axial direction exposed to the outside.
Both end faces in the axial direction including each of 0 and 50 are made of a non-magnetic material 4.
0, so that when applied to a rotating machine that is a generator or a motor, forced cooling is provided by providing ventilation holes in the case of the rotating machine and supplying air into the case by a fan arranged on the rotating shaft. , It is possible to completely protect each of the permanent magnets 30 from dust such as iron powder or water. Further, both end faces in the axial direction of the permanent magnet 50 can be completely protected. as a result,
The required performance and durability of the rotating machine can easily be secured for a long period of time.

Next, a method of manufacturing the rotor 100 shown in FIG. 12 will be described. The method for producing the rotor 100 shown in FIG. 12 is essentially the same as the method for producing the rotor 100 described above, and therefore, its outline will be described below.
FIG. 13 shows the inner magnetic plate 11 and the inner magnetic plate laminate 10 constituting the rotor 100 described with reference to FIG.
Outer magnetic plate main body 210 and outer magnetic plate main body laminate 2
20 is shown inserted into the cylindrical portion 302 of the assembling and forming die 300, and FIG. 14 shows the inner magnetic plate 1 constituting the rotor 100 described with reference to FIG.
1 and the inner magnetic plate laminate 10, the outer magnetic plate body 210, the outer magnetic plate body laminate 220, and the permanent magnet 30,
And each of the permanent magnets 50 is shown inserted into the cylindrical portion 302 of the assembling and molding die 300.

Referring to FIG. 13, the above-described substantially square inner magnetic plate 11 can be formed by punching a silicon steel plate (flat plate) using a press machine (not shown). Outer magnetic plate laminate 2 described above
In the state where the rotor 100 is completed as the rotor 100 after molding, as described above, each of the 0s is arranged as discontinuous independent members separated from each other in the circumferential direction. A radially outer end of each of the gaps filled with the fusible non-magnetic material 40 has a narrow arc-shaped bridging portion 2.
An outer magnetic plate main body laminated body 220 formed by laminating one outer magnetic plate main body 210 integrally formed so that the entire outer peripheral end thereof forms a continuous circular shape by being connected by 12 Is done. Then, the outer magnetic plate laminate 20 is separated into each of the outer magnetic plate laminates 20 as described above by cutting after molding, which will be described later.

The outer magnetic plate main body 210 formed by punching a silicon steel plate (flat plate) by a press machine (not shown) has four circular outer peripheral ends 211 and the same number as the sides 12 of the inner magnetic plate 11. Is formed between the radially inner end 23 and each circumferential end of the inner end 23, one end is opened radially inward and the other end is the outer circumferential end 211.
Has a through hole 214 formed by a closed groove 213 leaving a bridge portion 212 therebetween. Each of the inner ends 23 extends in a straight line, and is arranged so as to substantially form a side of a regular square, and a groove 213 is arranged at each of the corners of the regular square. The center of the regular square, that is, the center of the through hole 214 is positioned so as to coincide with the axis O of the outer magnetic plate main body 210. Each of the circumferential ends of the groove 213 extends in the radial direction through the axis O of the outer magnetic plate main body 210 and the not-shown corner of the regular quadrilateral when the outer magnetic plate main body 210 is viewed in the axial direction. It is formed so as to extend on two imaginary straight lines L3 extending in parallel in the radial direction through the axis O with the straight lines L interposed therebetween at equal intervals, and each radially outer end of the groove 213 has a circular shape. Outer end 211
Is formed in a circular arc shape parallel to. The circular portion indicated by the two-dot chain line 22 represents the same cutting plane as described above. Each of the permanent magnets 30 and 50 is formed in a rectangular parallelepiped shape.

The cylindrical portion 30 of the assembling and forming die 300
The inner magnetic plate 11 is stacked on the rotating shaft 2 set to 2 while being inserted through the mounting hole 14, and the outer magnetic plate main body 210 is stacked while being fitted into the cylindrical portion 302. By laminating these, the inner end 2 of the outer magnetic plate body 210 is formed.
3 and the corresponding side 12 of the inner magnetic plate 11, and a groove 213 of the outer magnetic plate body 210.
Is formed between each of them and the corresponding corner of the inner magnetic plate 11 to form the inner magnetic plate laminate 10 and the outer magnetic plate body laminate 220 in the cylindrical portion 302. Referring to FIG. 14 together with FIG. 13, a permanent magnet 30 is inserted into each of the radial gaps. The length in the longitudinal direction of each of the permanent magnets 30 in the transverse cross section is substantially the same as the length of the corresponding side 12 of the inner magnetic plate 11. Further, the permanent magnet 50 is inserted into each of the corner gaps 230 leaving a part of the gap (a part of the corner gap 230) 230a radially inward. The longitudinal length of each of the permanent magnets 50 in the cross section is substantially the same as the radial length of the corresponding groove 213 of the outer magnetic plate main body 210. As described above, each of the inner magnetic plate laminate 10, the outer magnetic plate body laminate 220, the permanent magnet 30, and the permanent magnet 5
After each 0 is set in the cylindrical portion 302 of the assembling and forming die 300, the open end of the cylindrical portion 302 is closed by the lid mold 303 in the same manner as in the previous embodiment. Next, the melted non-magnetic material 40 is applied to the inner magnetic plate laminate 10, each of the permanent magnets 30, each of the permanent magnets 50, the outer magnetic plate body laminate 220, and both ends in the axial direction of the gap 230a. The surface is covered with a layer of non-magnetic material 40 and a part of the gap 2
By filling (by pouring) each of the layers 30a with each of the layers, the rotating shaft 2, the inner magnetic plate laminate 10, each of the permanent magnets 30, each of the permanent magnets 50, and the outer magnetic plate The main body laminated body 220 is integrally cast except for a part of the outer peripheral surface of the outer magnetic plate main body laminated body 220. After the mold release, the outer peripheral ends of the outer magnetic plate main body laminated body 220 and the non-magnetic material 40 are cut, and each of the bridging portions 212 is cut off. By the above method, the rotor 100 shown in FIG. 12 can be manufactured. As a result, complicated work such as caulking, welding, bonding, etc. as in the conventional case is not required, the assembling work is simplified as compared with the conventional one, and the assembling work time is shortened and the burden of labor is reduced, As a result, it is possible to improve productivity and reduce manufacturing costs.

In each of the embodiments described above with reference to FIGS. 12 to 14, the number of sides 12 of the inner magnetic plate 11 and the inner magnetic plate laminate 10 is four, respectively. In the embodiment, if the number is an even number, the number holds even if the number is four or eight or more. According to the number of sides 12 of the inner magnetic plate 11 and the inner magnetic plate laminate 10, the configuration of the outer magnetic plate main body 210 and the outer magnetic plate main body laminate 220,
It goes without saying that the number of the permanent magnets 30 and 50 and the like are defined.

FIG. 15 shows still another embodiment of the inner magnetic plate 11 and the outer magnetic plate main body 210 constituting another embodiment of the rotor 100 of the rotating machine according to the present invention. The inner magnetic plate 11 made of the same material as in the previous embodiment has eight sides 12 extending linearly, and is formed to have a substantially regular octagonal shape. At eight corners of the inner magnetic plate 11, grooves 11A extending inward in the radial direction are formed. The circumferential width of the radially inner end of each of the grooves 11A is larger than the circumferential width of the radially outer region than the inner end. That is, each of the grooves 11A is formed so as to extend from the corresponding corner portion toward the axis with a constant circumferential width, and then extend to both sides in the circumferential direction at the radially inner end. A mounting hole 14 in which the rotating shaft 2 is mounted is formed in the axial center of the inner magnetic plate 11. Outer magnetic plate body 2 made of the same material as in the previous embodiment
10 is formed between eight radial inner ends 23 having a circular outer peripheral end 211 and having the same number as the sides 12 of the inner magnetic plate 11, and one radial end formed at each of the inner ends 23. A through-hole 214 is formed by a groove 213 that is opened inward in the direction and is closed at the other end with the outer peripheral end 211 while leaving a bridge portion 212 therebetween. Each of the inner ends 23 extends linearly, and is arranged so as to substantially form a regular octagonal side, and a groove 213 is arranged at each corner of the regular octagon. The center of this regular octagon, and thus the through hole 21
The center of 4 is positioned so as to coincide with the axis O of the outer magnetic plate main body 210. The circumferential width of the radially outer end of each of the grooves 213 is formed larger than the circumferential width of the radially inner region than the outer end. That is, each of the grooves 213 is formed so as to extend radially outward from the corresponding corner with a constant circumferential width and then extend to both circumferential sides at the radially outer end. Groove 21
3 is formed in an arc shape parallel to the circular outer peripheral end 211. The circular portion indicated by the two-dot chain line 22 represents a plane to be cut (planned cutting line) to be cut by the same cutting as in the previous embodiment. This cutting margin is at least as large as the outer magnetic plate body 21.
It is defined that each of the zero bridging portions 212 is completely cut off.

FIG. 16 shows the inner magnetic plate 11 shown in FIG.
Each of the inner magnetic plate laminate 10, the outer magnetic plate main body 210, the outer magnetic plate main body laminate 220, and the permanent magnet 30 is shown inserted in the cylindrical portion 302 of the assembling and molding die 300. Have been. Each of the permanent magnets 30 is inserted in a radial gap between each of the sides 12 of the inner magnetic plate laminate 10 and the corresponding inner end 23 of the outer magnetic plate body laminate 220. Each of the grooves 11A of the inner magnetic plate laminate 10 and each of the grooves 213 of the outer magnetic plate body laminate 220 are circumferentially aligned and positioned, and the rotor 100 is substantially the same as in the previous embodiment. Be produced.

In the rotor 100 including the above members shown in FIGS. 15 and 16, grooves 11A extending inward in the radial direction are formed at each corner of the inner magnetic plate laminate 10, and each of the grooves 11A is formed. The circumferential width of the radially inner end portion is larger than the circumferential width of the radially outer region than the inner end portion, and the circumferential gap between each of the permanent magnets 30 and between each of the outer magnetic plate laminates 210 is formed. The circumferential width of the radially outer end of each of the corner gaps formed by each of the grooves is formed larger than the circumferential width of the radially inner region than the outer end, and the gap formed by each of the grooves 11A Are aligned with each of the corner gaps to form part of each of the corner gaps. Each of these corner gaps is filled with the molten non-magnetic material 40 described above. The non-magnetic material 40 filled in each of the corner gaps has a radially inner end and a radially outer end. Is wider in the circumferential direction than other portions existing therebetween, so that the rotor 100 is less likely to protrude radially outwardly at the time of high-speed rotation than in the previous embodiment, and is more reliably prevented from protruding. ,
And the advantage is obtained. The rotor 100 including the above members shown in FIGS. 15 and 16 shares the characteristic basic configuration in the previous embodiment described with reference to FIGS. It is needless to say that the same effects can be obtained as in this embodiment.

FIG. 17 shows an embodiment of a magnetic plate 400 constituting another embodiment of the rotor 100 of the rotating machine according to the present invention. The magnetic plate 400 shown in FIG.
The difference from the set of the inner magnetic plate 11 and the outer magnetic plate main body 210 shown in FIG. 6 is that the corresponding grooves of the outer magnetic plate main body 210 are arranged from the circumferential center of each radial inner end of the groove 11A of the inner magnetic plate 11. 213 is formed with a radial bridging portion 406 extending over the circumferential center of the radially outer end. Each of the radial bridges 406
Each of the corner gaps is arranged so as to be divided into two in the circumferential direction. In the embodiment shown in FIG. 17, the inner magnetic plate 11 and the outer magnetic plate
The eight radial bridging portions 406 form an integral structure. Therefore, the inner magnetic plate 11 and the outer magnetic plate main body 210 in the embodiment shown in FIG. 17 are constituted by one magnetic plate 400 having an integral structure.

The magnetic plate 400 has a mounting hole 14 formed at the axis and having the axis O, a circular outer peripheral end 402 having the same axis as the axis O, and an even number of the center around the axis O. A radial gap 404 formed to form a substantially regular polygon (a regular octagon in the embodiment), and a radial bridge formed to extend in a radial direction at each corner of the radial gap 404. (Bridge) 406 in the circumferential direction, and a pair of circumferential gaps 408 formed to extend in the radial direction along the circumferential direction. Each of the radial gap 404 and the circumferential gap 408 is formed from a through hole. Each of the radial gaps 404 is formed to extend linearly with a constant radial width. Each of the circumferential gaps 408 extends from the radially inner side to the radially outer side of each of the radial gaps 404, and each radially outer end forms an arc shape parallel to the circular outer peripheral end 402. I have.
Each radially outer end of the circumferential gap 408 and the magnetic plate 40
A circumferential bridging portion 410 extending in an arc shape is formed between the outer circumferential end 402 and the circular outer end 402. Radial bridge 406
Are formed to extend linearly in the radial direction with a constant circumferential width, and each radially outer end is connected to a corresponding circumferential bridge 410. Radial bridge 40
6 are arranged in the circumferential direction so as to sandwich each of them in the circumferential direction.
8, the circumferential width of the radially inner end and the circumferential width of the radially outer end are greater than the circumferential width of the entire intermediate region between the radially inner end and the radially outer end. Is formed. Each pair of circumferential gaps 408 is a radial gap 40
4 constitutes a corner gap at each corner, the circumferential width of each radial inner end and the circumferential width of the radial outer end of each corner gap are the same as the radial inner end and the radial direction. It can be said that it is formed wider than the circumferential width of the entire intermediate region between the outer end portion. The circular portion indicated by the two-dot chain line 22 represents a plane to be cut (planned cutting line) to be cut by the cutting performed in substantially the same manner as described above. This cutting allowance is defined at least to such an extent that each of the circumferential bridging portions 410 is completely cut off.

FIG. 18 shows a state where the magnetic plate 400 and the magnetic plate laminate 420 shown in FIG. 17 and the permanent magnet 30 are inserted into the cylindrical portion 302 of the assembling and forming die 300. ing. Each of the permanent magnets 30 is inserted into a corresponding radial gap 404 of the magnetic plate laminate 420. The rotor 100 is manufactured as follows. That is,
The rotating shaft 2 is set in accordance with the axis of the mold 300 having the cylindrical portion 302. Next, the magnetic plate 400 is attached to the mounting hole 14.
While being inserted into the rotating shaft 2 through the
Are laminated while fitting into the cylindrical portion 302 to form the magnetic plate laminate 420. After inserting the permanent magnet 30 into each of the radial gaps 404 of the magnetic plate laminate 420, the molten non-magnetic material 40 is cast, and the magnetic plate laminate 42 is cast.
0, both ends of each of the permanent magnets 30 and the circumferential gap 408 in the axial direction are covered with a layer of the non-magnetic material 40, and the circumferential gap 408 is filled so as to be integrated with each of the layers. After the mold release, the outer peripheral ends of the magnetic plate laminate 420 and the non-magnetic material 40 are cut to cut off each of the circumferential bridging portions 410. Next, balancing is performed, and the rotor 1 (not shown) is
00 is produced. In the embodiment shown in FIGS. 17 and 18, since the magnetic plate 400 is formed of a single magnetic steel plate having an integral structure, the assembling and forming die 300 is formed.
Inserting into the cylindrical portion 302 and assembling the magnetic plate laminate 420 are further facilitated. Other configurations are shown in FIG.
16 is substantially the same as that of the embodiment shown in FIG.
And the same benefits can be obtained. The magnetic plate 400
Is lost by the cutting process described above,
Since each of the radial bridging portions 406 exists in the corner gap filled with the non-magnetic material 40, the strength at the time of high-speed rotation can be improved as compared with the embodiment shown in FIGS. it can. There is another embodiment in which the inner magnetic plate 11 and the outer magnetic plate main body 210 shown in FIG.

The rotor of the rotating machine according to the present invention and the method of manufacturing the same have been described in detail based on the embodiments with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and the present invention is not limited thereto. Without departing from the scope of the invention,
Still other various changes or modifications are possible. For example, there are various types of rotors called IPMs in addition to the above-described embodiment. However, the present invention relates to an inner magnetic plate laminate mounted on a rotating shaft and an inner magnetic plate laminate. An outer magnetic plate laminate substantially disposed radially outward, a plurality of permanent magnets inserted between at least the inner magnetic plate laminate and the outer magnetic plate laminate, and a plurality of nonmagnetic materials can be accommodated. As long as the rotor of the rotating machine has a gap, the present invention can be applied to a rotor of another form other than the above embodiment. One end of each of the gaps is formed to open at one axial end surface of the rotor body, and the other end is formed to open at the other axial end surface of the rotor body. By accommodating a non-magnetic material in each of the gaps, the gap functions as a partition for preventing a magnetic short circuit between different poles, and there are various arrangement forms. And the feature of the present invention is an inner magnetic plate laminate,
Both end faces in the axial direction of each of the permanent magnets, each of the outer magnetic plate laminates, and each of the gaps are covered by a layer of fusible non-magnetic material, and each of the gaps is integrated with each of the layers by the non-magnetic material. Is filled so that This distinctive arrangement allows for the previously described as-casting, and thus achieves the various advantages described above.

In the above embodiment, the inner magnetic plate 11, the outer magnetic plate 21, and the magnetic plate 400 are made of a silicon steel plate, which is one embodiment of an electromagnetic steel plate. On the other hand, other embodiments composed of soft magnetic steel plates such as SPCC, SPHC, SS41P, etc., of course, also hold. In short, a steel sheet made of a magnetic material (either a ferromagnetic material or a soft magnetic material) instead of a non-magnetic material is applicable. Furthermore, in the above-described embodiment, the non-magnetic material 40 is formed of a non-magnetic metal material such as aluminum, an aluminum alloy, and a zinc alloy, but is formed of a non-metal material such as a high-strength synthetic resin having heat resistance. It may be formed. When aluminum is used as the non-magnetic material 40, since there is a possibility that a slight gap may be formed between the non-magnetic material 40 and the electromagnetic steel sheet due to relatively large shrinkage during cooling, the impregnating agent (the adhesive and the adhesive) may be used. It is preferable to inject (can be shared). It is preferable that the fusible non-magnetic material 40 be made of a material having relatively low electric resistance, such as aluminum.

[0061]

According to the rotor of the rotating machine and the method of manufacturing the same according to the present invention, the assembling work is simplified as compared with the related art.
Then, the assembling work time is shortened and the burden of labor is reduced, and as a result, it is possible to improve productivity and reduce manufacturing costs. In addition, it is possible to easily reduce the magnetic short circuit between different poles and to secure the strength at the time of high-speed rotation. Furthermore, the number of parts is significantly reduced, thereby improving productivity and reducing manufacturing costs. Furthermore, it is possible to easily ensure the required performance and durability of the rotating machine sufficiently over a long period of time.

[Brief description of the drawings]

FIG. 1 is a view of an embodiment of a rotor according to the present invention as viewed from a radially outer side.

FIG. 2 is a perspective view showing the rotor shown in FIG. 1 with a non-magnetic material covering one end in the axial direction thereof removed;

FIG. 3 is a view of the rotor shown in FIG. 2 viewed in an axial direction.

FIG. 4 is a plan view of an inner magnetic plate.

FIG. 5 is a plan view of an outer magnetic plate.

FIG. 6 is an exploded perspective view schematically showing an assembly and forming mold for the rotor shown in FIG. 1 and members constituting the rotor;

FIG. 7 is a view of the state in which the inner magnetic plate and the outer magnetic plate are inserted into the cylindrical portion of the assembling and forming die shown in FIG. 6, as viewed in the axial direction.

FIG. 8 is a view showing a state in which a permanent magnet is further inserted in FIG. 7;

FIG. 9 is a view showing members constituting another embodiment of the rotor according to the present invention, and is a view similar to FIG. 8;

FIG. 10 is a view showing members constituting still another embodiment of the rotor according to the present invention, and is a view similar to FIG. 8;

FIG. 11 is a view showing members constituting still another embodiment of the rotor according to the present invention, and is a view similar to FIG. 8;

FIG. 12 is a perspective view showing still another embodiment of the rotor according to the present invention, and is a perspective view similar to FIG. 2;

FIG. 13 is an axial view of a state where the inner magnetic plate and the outer magnetic plate included in the rotor shown in FIG. 12 are inserted into the cylindrical portion of the assembling and forming die shown in FIG. 6;

FIG. 14 is a diagram showing a state where a permanent magnet is further inserted in FIG. 13;

FIG. 15 is a view of an inner magnetic plate and an outer magnetic plate constituting a further embodiment of the rotor according to the present invention, which are arranged coaxially and viewed in the axial direction.

FIG. 16 shows an inner magnetic plate and an outer magnetic plate shown in FIG.
The figure which looked at the state inserted in the cylindrical part of the assembly | attachment and shaping | molding die shown in FIG. 6, and was seen in the axial direction.

FIG. 17 is a view of an integrally-structured magnetic plate constituting a further embodiment of the rotor according to the present invention, as viewed in the axial direction.

18 is a view of the state in which the magnetic plate shown in FIG. 17 is inserted into the cylindrical portion of the assembling and forming die shown in FIG. 6, as viewed in the axial direction.

[Explanation of symbols]

 2 Rotation axis 10 Inner magnetic plate laminate 11 Inner magnetic plate 12 Side 13 Protrusion 20 Outer magnetic plate laminate 22 Planned cutting surface 21 Outer magnetic plate 30, 50 Permanent magnet 40 Non-magnetic material 100 Rotor 210 Outer magnetic plate main body 212 Bridge Part 220 Outer magnetic plate main body laminate 230 Corner gap 230a Part of remaining gap 400 Magnetic plate 404 Radial gap 406 Radial bridge 408 Circumferential gap 410 Circumferential bridge 420 Magnetic plate laminate

Claims (10)

[Claims] An inner magnetic plate laminate mounted on a rotating shaft, an outer magnetic plate laminate disposed substantially radially outside the inner magnetic plate laminate, at least an inner magnetic plate laminate and an outer magnetic plate In a rotor of a rotating machine having a plurality of permanent magnets inserted between the laminated body and a plurality of gaps capable of accommodating a non-magnetic material, an inner magnetic plate laminated body, each of a permanent magnet, and an outer magnetic plate Both end faces in the axial direction of each of the laminate and each of the gaps are covered with a layer of a non-magnetic material that can be melted, and each of the gaps is filled with the non-magnetic material so as to be integral with each of the layers. A rotor for a rotating machine, characterized in that: 2. A substantially polygonal inner magnetic plate laminate mounted on a rotating shaft and having an even number of sides, and a radial direction disposed radially outside each of the sides with a radial gap therebetween. The same number of outer magnetic plate laminates as the sides having inner ends and arranged with a circumferential gap therebetween, and a plurality of permanent magnets inserted into each of the radial gaps with a circumferential gap therebetween Wherein each of the circumferential gaps between each of the permanent magnets and between each of the outer magnetic plate laminates is arranged so as to be aligned with each other at corresponding corners of the inner magnetic plate laminate to form a corner gap. In the rotor of the rotating machine to be formed, the inner side magnetic plate laminate, each of the permanent magnets, each of the outer magnetic plate laminates, and both axial end faces of each of the corner gaps are covered with a layer of fusible non-magnetic material. And each of the corner gaps is integrated with each of the layers by the non-magnetic material. So as are filled, the rotor of the rotating machine, characterized in that. 3. Each of the corners of the inner magnetic plate laminate is formed with a projection extending radially outward toward the corresponding corner gap, and each of the projections is formed at a corresponding corner. The rotor of the rotating machine according to claim 2, wherein the rotor is positioned between circumferential ends of the permanent magnets that face each other in the circumferential direction. 4. Each of the protrusions is positioned to extend a radial center of the corresponding corner gap to a radially outer end of the corner gap and divide the corner gap into two in the circumferential direction. The rotor of the rotating machine according to claim 3, wherein: 5. The outer magnetic plate laminate, the non-magnetic material filled in each of the corner gaps, and the radially outer end face of each of the non-magnetic material layers are substantially on a common circular outer peripheral surface. The rotor of the rotating machine according to claim 2 or 3, wherein the circular outer peripheral surface is formed from a cutting surface. 6. A groove extending radially inward is formed at each of the corners of the inner magnetic plate laminate, and a circumferential width of a radially inner end of each of the grooves is larger than that of the inner end. Is also formed wider than the circumferential width of the radially outer region, the circumferential width of the radially outer end in each of the corner gaps is formed wider than the circumferential width of the radially inner region than the outer end, The rotor of a rotary machine according to claim 2, wherein each of the gaps formed by each of the grooves is aligned with each of the corner gaps to form a part of each of the corner gaps. 7. A substantially polygonal inner magnetic plate laminate mounted on a rotating shaft and having an even number of sides, and a radial direction disposed radially outside each of the sides with a radial gap therebetween. The same number of outer magnetic plate laminates as the sides having inner ends and arranged with a circumferential gap therebetween, and a plurality of permanent magnets inserted into each of the radial gaps with a circumferential gap therebetween Wherein each of the circumferential gaps between each of the permanent magnets and between each of the outer magnetic plate laminates is arranged so as to be aligned with each other at corresponding corners of the inner magnetic plate laminate to form a corner gap. In the rotor of the rotating machine, wherein a permanent magnet is inserted into each of the corner gaps leaving a part of the gap radially inward in each of the corner gaps, an inner magnetic plate laminate, each of the permanent magnets, and an outer magnetic plate Both end faces in the axial direction of each of the laminates and a part of the gap can be melted. The rotor of the rotating machine, such portion of each of the inter-covered by a layer and 該隙 of non-magnetic material is filled so that the said layer of each integral with the non-magnetic material, it is characterized. 8. A rotary shaft is set in accordance with the axis of a mold having a cylindrical portion, and a substantially polygonal inner magnetic plate having a mounting hole formed in the axis and having an even number of sides is mounted. Laminated while being inserted into the rotating shaft through the hole, and formed between the circular outer peripheral end, the same number of radial inner ends as the sides, and the peripheral ends of each of the inner ends, and one end is radially inward. The outer magnetic plate body, which is open and the other end of which has a through hole having a closed groove leaving a bridging portion between itself and the outer peripheral end, is laminated while fitting the cylindrical portion into the inner magnetic plate body. A radial gap is formed between each of the ends and the corresponding side, and a corner gap is formed between each of the grooves and the corresponding corner of the inner magnetic plate to form an inner magnetic gap in the cylindrical portion. After forming a plate laminate and an outer magnetic plate body laminate and inserting a permanent magnet into each of the radial gaps, The inner magnetic plate laminate, each of the permanent magnets, the outer magnetic plate body laminate,
And covering both end faces in the axial direction of the corner gap with the layer of the non-magnetic material, filling each of the corner gaps integrally with each of the layers, releasing the mold, and then laminating the outer magnetic plate main body. A method of manufacturing a rotor for a rotating machine, comprising cutting an outer peripheral end of a body and a nonmagnetic material to cut off each of bridge portions. 9. A rotary shaft is set in accordance with the axis of a mold having a cylindrical portion, and a substantially polygonal inner magnetic plate having an attachment hole formed in the axis and having an even number of sides is attached. Laminated while being inserted into the rotating shaft through the hole, and formed between the circular outer peripheral end, the same number of radial inner ends as the sides, and the peripheral ends of each of the inner ends, and one end is radially inward. The outer magnetic plate body, which is open and the other end of which has a through hole having a closed groove leaving a bridging portion between itself and the outer peripheral end, is laminated while fitting the cylindrical portion into the inner magnetic plate body. A radial gap is formed between each of the ends and the corresponding side, and a corner gap is formed between each of the grooves and the corresponding corner of the inner magnetic plate to form an inner magnetic gap in the cylindrical portion. Forming a plate laminate and an outer magnetic plate body laminate, inserting a permanent magnet into each of the radial gaps, and After inserting a permanent magnet leaving a part of the gap radially inward of each of them, a molten non-magnetic material is cast, and each of the inner magnetic plate laminate, the permanent magnet, and the outer magnetic plate body laminate is cast. Body, and covering both axial end surfaces of each of the gaps with the layer of nonmagnetic material, and filling each of the gaps so as to be integral with each of the layers,
A method for producing a rotor for a rotating machine, comprising: after releasing, a peripheral portion of an outer magnetic plate main body laminate and a non-magnetic material are cut to cut off each of bridge portions. 10. A rotating shaft is set in accordance with the axis of a mold having a cylindrical portion, and a mounting hole formed in the axis, a circular outer peripheral end, and an even number of substantially regular polygons are formed. The formed radial gap and the radial bridging portion formed to extend in the radial direction at each corner of the radial gap are formed so as to radially extend along and radially sandwich the circumferential bridging portion. A magnetic plate having a pair of circumferential gaps forming a circumferential bridging portion with the circular outer peripheral end is inserted into the rotating shaft through the mounting hole, and the circular outer peripheral end is inserted into the cylindrical portion. Forming a magnetic plate laminate by laminating while fitting,
After inserting a permanent magnet into each of the radial gaps, a molten non-magnetic material is cast, and the magnetic plate laminate, each of the permanent magnets, and both end faces in the axial direction of the circumferential gap are fixed to the non-magnetic material. , And each of the pairs of circumferential gaps is filled so as to be integrated with each of the layers, and after releasing, the outer peripheral ends of the magnetic plate laminate and the non-magnetic material are cut to form a circumferential bridge. A method for producing a rotor of a rotating machine, comprising cutting off each of the following.