KR20220040321A - Axial field flow rotating machine - Google Patents

Abstract

Provided is an axial magnetic flux rotating machine, which comprises: a housing; a rotating shaft rotatably coupled to the housing; at least one pair of rotors installed to be spaced apart from each other in the axial direction of the rotating shaft and having a plurality of permanent magnets fixed to opposite surfaces; and a stator fixed to the housing at a position between the pair of rotors and having a coil wound therearound. The housing includes a first housing and a second housing which are separated in the axial direction and are detachable from each other. The first housing and the second housing each have housing support surfaces for supporting both surfaces of the stator. Therefore, the stator is detachably coupled to the housing, and disassembly is very easy. In particular, the plurality of rotors are more easily separated from each other, disassembly and assembly are very easy.

Description

Axial field flow rotating machine

The present invention relates to a rotating machine, and more particularly, to an axial magnetic flux rotating machine such as an electric motor or a generator using an axial magnetic flux.

The axial magnetic flux rotating device is composed of a disk-shaped rotor and a stator in which magnets or coils are installed, and refers to an electric motor or a generator that is driven to rotate according to a change in magnetic force formed in the axial direction of a rotating shaft.

As an example of the conventional axial magnetic flux rotating machine, there is Patent Document 1 and the like.

As disclosed in Patent Document 1 and the like, in a conventional axial magnetic flux rotating machine, a stator plate provided with a coil and a rotor plate provided with a permanent magnet are installed alternately in the axial direction. When the shaft rotates, the rotor plate is fixed to the shaft, and the stator plate is fixed to the housing. In addition, the rotor plate and the stator plate are coupled with a very precise gap for efficiency. In addition, a very strong attractive force is generated between the opposite rotor plates.

In the case of such a conventional axial magnetic flux rotating machine, in the case of a disconnection of a coil of a stator or a disconnection of a lead wire connecting power to the coil, there is a disadvantage that it is very difficult to disassemble for repair.

KR 10-2019-0020024 A

An embodiment of the present invention has been devised to solve the above problems, and it is intended to provide an axial magnetic flux rotating device that is very easy to disassemble and assemble.

An embodiment of the present invention to solve the above problems, the housing; a rotating shaft rotatably coupled to the housing; at least one pair of rotors installed spaced apart from each other in the axial direction of the rotation shaft and having a plurality of permanent magnets fixed to opposite surfaces; and a stator fixed to the housing at a position between the pair of rotors and having a coil wound thereon, wherein the housing includes a first housing and a second housing that are separated in an axial direction and are detachable from each other, the The first housing and the second housing provide an axial magnetic flux rotating machine, wherein housing support surfaces for supporting both surfaces of the stator are respectively formed.

It is preferable that at least one of the pair of rotors is detachably coupled to the housing.

The stator may include a plurality of stator coils; and a coil fixing frame in which a plurality of stator coil receiving portions to which the stator coil is fixed are formed, wherein the coil fixing frame includes an outer rim formed to protrude outward in a radial direction of the stator coil.

Preferably, the outer rim is formed so that a stator support surface engaged with the housing support surface protrudes in a thickness direction of the stator.

The stator support surface is stepped, and the housing support surface is stepped to engage the stator support surface.

The outer rim is formed with a through hole to expose at least a portion of the side surface of the coil.

The coil fixing frame may include: an inner rim formed inside the outer rim; and a plurality of partition members having one end fixed to the outer rim and one end fixed to the inner rim to form a plurality of the coil receiving portions in a circumferential direction.

A groove is formed in the outer surface of the outer rim in the radial direction so that the lead wire of the coil can be gripped.

According to the problem solving means of the present invention as described above, various effects including the following items can be expected. However, the present invention is not established only when exhibiting all of the following effects.

Embodiments of the present invention, the stator is detachably coupled to the housing, there is an advantage that it is very easy to disassemble. In particular, since the plurality of rotors are more easily separated from each other, disassembly and assembly are very easy.

In addition, there is an advantage that the height position of the stator and the rotor can be precisely matched. That is, the height of the stator can be adjusted by using the housing support surface that can easily increase processing precision, and the rotor is fixed to each separated shaft, thereby increasing the precision in the height direction.

In addition, since the housing support surface and the stator support surface are formed in stages, there is an advantage that concentric circles of the stator can be easily and precisely combined.

1 is a perspective view of an axial magnetic flux rotating device according to a first embodiment of the present invention;
Figure 2 is an exploded perspective view of Figure 1;
3 is a cross-sectional view taken along line III-III of FIG. 2 ;
4 is a partially exploded perspective view of the stator of FIG.
Figure 5 is a perspective view of the rotor of Figure 2;
6 is a rear perspective view of FIG.
7 is a perspective view showing a modified example of the rotor of FIG.
8 is a perspective view showing another modified example of the rotor of FIG.
9 is a rear perspective view of FIG.
10 is a plan view showing another modified example of the rotor of FIG.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of an axial magnetic flux rotating device according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG.

The axial magnetic flux rotating device of the first embodiment includes a housing 600 , a rotating shaft 400 rotatably coupled to the housing 600 , and installed spaced apart from each other in the axial direction of the rotating shaft 400 , facing each other At least a pair of rotors 100 having a plurality of permanent magnets 210 fixed to a viewing surface, and a pair of rotors 100 are fixed to the housing 600 at a position between, and a coil 310 is wound and a stator 300 .

The housing 600 is separated in the axial direction and includes a first housing 610 and a second housing 620 that are detachable from each other, and the first housing 610 and the second housing 620 are connected to the stator. Housing support surfaces 611 and 621 for supporting both surfaces of the 300 are formed, respectively.

The second housing 620 is formed in the shape of a cylindrical bowl with an open top, and one end of the rotation shaft 400 passes through the bottom plate and the second shaft support hole 623 in which the second bearing 642 is installed is formed. . In addition, a plurality of second heat dissipation holes 624 for heat dissipation are formed. In addition, the lead-in lead-out hole 624 through which the lead-in wire of the coil can be drawn out is formed through the side wall, so that the coil lead-in wire is connected to the terminal block coupled to the terminal block cover 630 . In addition, the second housing support surface 621 is formed to protrude upward from the bottom plate. As shown in FIG. 3 , the second housing support surface 621 is formed by stepping a second inner support surface 621a and a second outer support surface 621b. That is, the second inner support surface 621a is formed to protrude more from the bottom than the second outer support surface 621b.

The first housing 610 is formed in a disk shape, and the rotation shaft 400 passes through the center and the first shaft support hole 613 in which the first bearing 641 is installed is formed through it. In addition, a plurality of first heat dissipation holes 614 for heat dissipation are formed to pass through. In addition, a plurality of fastening holes 615 are formed so that they can be coupled to the second housing 620 using bolts or the like. As shown in FIG. 3 , a first housing support surface 611 is formed on the lower surface of the outer periphery. The first housing support surface 611 has a first inner support surface 611a and a first outer support surface 611b protrudes toward the second housing. As shown, the first housing support surface 611 is stepped. That is, the first inner support surface 611a more protrudes toward the second housing than the second inner support surface 611b.

The housing support surfaces 611 and 621 include a first housing support surface 611 and a second housing support surface 621 .

4 is a partially exploded perspective view of the stator of FIG. 2 ;

The stator 300 includes a plurality of stator coils 310 and a coil fixing frame 380 in which a plurality of stator coil seating parts 384 to which the stator coil 310 is fixed are formed.

The coil fixing frame 380 has an outer rim 381 protruding outward in the radial direction of the stator coil, an inner rim 383 formed inside the outer rim 381 , and one end of the outer rim 381 . and the other end is fixed to the inner rim 383 and includes a plurality of partition members 386 forming a plurality of the coil receiving portions 384 in the circumferential direction.

The outer rim 381 is formed such that a stator support surface 381a engaged with the housing support surfaces 611 and 621 protrudes in the thickness direction of the stator. The stator support surface 381a is stepped to engage the housing support surfaces 611 and 621 .

A through hole 385 is formed in the outer rim 381 to expose at least a portion of a side surface of the coil. Therefore, after the single wound coil 310 is inserted through the through hole 385 and seated on the coil receiving part 384, the entire stator is molded using a resin material, etc., so that the coil 310 is connected to the coil fixing frame ( 380) can be fixed.

A groove 387 is formed in the outer surface of the outer rim 381 by digging in the radial direction so that the lead wire of the coil can be gripped. Accordingly, by preventing the lead-in wire from protruding to the outside, it is possible to not only increase the precision of assembling, but also to make the assembling easier.

The rotation shaft 400 includes a first shaft 410 for fixing any one of the pair of rotors 100 and a second shaft 420 for fixing the other of the pair of rotors 100 . do. The first shaft 410 and the second shaft 420 are separated from each other and are coupled to each other to be detachable.

A first coupling hole 412 is formed in the first shaft 410, and a second coupling hole 422 communicating with the first coupling hole 412 passes through the second shaft 420, and the Threads are formed on inner peripheral surfaces of the first coupling hole 412 and the second coupling hole 422 . In addition, the diameter of the first coupling hole 412 is formed smaller than the diameter of the second coupling hole 422 . For example, when the first coupling hole 412 is formed with an M5 screw coupling hole, the second coupling hole 422 may be formed with an M6 screw coupling hole. Therefore, when the first shaft and the second shaft are coupled, the shaft coupling bolt 430 is coupled using an M5 screw, and when the first shaft and the second shaft are separated, the M5 screw that is the shaft coupling bolt 430 is separated. After that, the 1st and 2nd shafts can be separated by pushing out the 1st shaft using a larger diameter M6 screw.

Hub plates 411 and 421 to which the rotor 100 is fixed are formed on the first shaft 410 and the second shaft 420 , respectively. That is, the hub plates 411 and 421 are formed with a plurality of screw coupling holes that can be fastened to the rotor 100 .

A rotation preventing protrusion 413 protrudes from any one of the first shaft 410 and the second shaft 420, and the first shaft 410 and the first shaft 410 so that the rotation preventing protrusion 413 can be fitted. A rotation preventing groove portion 423 is concavely formed in the other one of the second shafts 420 . In the embodiment of the present invention, the anti-rotation protrusion 413 is formed in a quadrangular pole shape on the first shaft 410, and the anti-rotation groove 423 is installed on the second shaft 420 and the anti-rotation protrusion 413 is fitted. It is formed in a shape that can be

5 is a perspective view of the rotor of FIG. 2 , and FIG. 6 is a rear perspective view of FIG. 2 .

As shown in these drawings, the rotor 100 includes a rotor frame 120 to which a plurality of the permanent magnets 210 are alternately fixed, and the stator 300 of the rotor frame 120 . It is formed on the surface facing the magnet cover 121 for supporting the permanent magnet (210). In addition, at least one of the pair of rotors 100 is detachably coupled to the housing 600 . In the embodiment of the present invention, both rotors 100 are detachably coupled to the housing 600 .

The rotor frame 120 includes a separation prevention ring 122 formed on the outermost side in a radial direction to prevent the permanent magnet 210 from being separated in a radial direction, and a rotor hub fixed to the rotation shaft 400 . 124 and a plurality of ribs 123 connecting the separation prevention ring 122 and the rotor hub 124 and forming a permanent magnet seating portion 125 in which the permanent magnet 210 is installed. include The rib 123, the rotor hub 124, and the separation prevention ring 122 are formed by filleting in a gentle curved shape.

One permanent magnet may be seated on the permanent magnet seat 125 in the permanent magnet seat 125, but if necessary (for example, when using a halberd arrangement), a plurality of the permanent magnets 210 are A plurality of groups may be installed between the ribs 123 of the rotor frame 120 .

That is, as shown in FIG. 5 , a plurality of the permanent magnets 210a , 210b , and 210c in one group may be seated on one permanent magnet seating part 125 . In this case, the permanent magnets 210a, 210b, and 210c coupled in one group are formed to have different shapes from each other so that assembly is much easier. That is, as shown in FIG. 5, the permanent magnet 210a located on the left is chamfered in a gentle curved shape at the upper left and lower ends, and the permanent magnet 210c located on the right is chamfered in the upper and lower right corners in a gentle curved shape. It is formed, and the permanent magnet 210b located in the center has four upper, lower, left, and right corners formed at right angles without chamfering, thereby preventing the operator from confusing their positions when assembling.

In order to increase the adhesion between the permanent magnets 210a, 210b, and 210c and the permanent magnet seating portion 125, a separate coating layer is not formed on the permanent magnet or the seating portion.

The magnet cover 121 is formed to prevent the permanent magnet 210 from being exposed toward the stator 300 . The thickness of the magnet cover 121 is more effective in preventing the loss of the descendants to be formed thinner than the thickness of other parts of the rotor frame 120 . The rotor frame 120 and the magnetic cover 121 may be separately formed and fixed, or may be formed integrally. However, the method of forming separately and fixing it by welding or the like is more preferable to form a thinner and more uniform thickness of the magnet cover 121 .

In this way, since the magnetic cover is formed, it is possible to significantly reduce the work required to more uniformly form the surface of the permanent magnet 210 formed on the surface facing the stator. In addition, it is possible to prevent the permanent magnet 210 from being separated to the stator side due to strong attractive force and causing a malfunction.

7 is a perspective view illustrating a modified example of the rotor of FIG. 5 , FIG. 8 is a perspective view illustrating another modified example of the rotor of FIG. 5 , and FIG. 9 is a rear perspective view of FIG. 8 .

The magnet covers 1121 and 2121 of the rotor shown in these drawings are characterized in that the permanent magnet 210 is partially exposed toward the stator 300 side. When formed in this way, there is an advantage that can reduce the loss of magnetic force.

However, in order to prevent the permanent magnet from being separated to the stator side, as shown in FIGS. 8 and 9, the rotor hub 2124 has an inner support part 2125 for supporting one end of the permanent magnet 210 is formed, It is more effective that the magnet cover 2121 is formed to support the other end of the permanent magnet 210 . In contrast, in the embodiment shown in FIG. 7 , the area of the magnet cover 1121 is formed to be wider to support a large area of the permanent magnet, and corresponds to the inner support 2125 of the embodiment shown in FIGS. 8 and 9 . configuration has been omitted.

10 is a plan view illustrating another modified example of the rotor of FIG. 5 .

The rotor shown in FIG. 10 is integrally formed with a rotor frame 3120 and a magnet cover, and is formed to protrude from the rotor frame between the permanent magnets to fix the position in the circumferential direction of the permanent magnets. It is characterized in that it further comprises a protrusion (3124).

Hereinafter, the assembly and disassembly of the axial rotary machine of the embodiment of the present invention will be described.

Referring to the assembly first with reference to FIG. 2 , the first shaft hub plate 411 is fixed to the rotor hub 124 in a state in which the first shaft 410 is inserted into the hollow of the rotor 100 located at the bottom. . In addition, the second shaft hub plate 421 is fixed to the rotor hub 124 in a state in which the second shaft 420 is inserted into the rotor 100 located on the upper side.

In this state, the first shaft 410 coupled to the rotor 100 is coupled to the second housing 620 located at the lower side, and the stator 300 is positioned above the second housing 620 . That is, the lower stator support surface 381a is positioned to engage the second housing support surface 621 .

Then, by inserting the anti-rotation protrusion into the anti-rotation groove, the second shaft 420 is coupled to the first shaft 410 . Then, the first housing is coupled to the second shaft. Then, a shaft coupling bolt 430 suitable for the diameter of the first coupling hole 412 is fitted and coupled. That is, when the diameter of the first coupling hole 412 is M5, it is coupled using the M5 size shaft coupling bolt 430 .

Then, the assembly is completed by coupling the second housing 620 to the first housing 610 using a bolt or the like.

When disassembling because internal repair is required, after disassembling the bolts coupling the second housing 620 and the first housing 610 in the reverse order of assembly, and then releasing the shaft coupling bolt 430, By using a bolt that matches the size of the second coupling hole 422 having a larger diameter than the shaft coupling bolt 430 used for coupling (eg, M6), inserting it into the second shaft 641 and tightening it, Make sure that the 1st and 2nd shafts are separated. By doing this, due to the strong magnetic force between the permanent magnets 210 facing each other installed in the rotor, it solves the very difficult point of separating the facing rotor 100 from each other.

Then, the release can be completed by releasing the stator 300 and separating each rotor 100 and the first shaft and the second shaft.

As described above, in the embodiments of the present invention, since the stator is not attached to the housing, disassembly is very easy.

In addition, there is an advantage that the height position of the stator and the rotor can be precisely matched. That is, the height of the stator can be adjusted by using the housing support surfaces 611 and 621 , which can easily increase processing precision, and the rotor is fixed to each separated shaft, thereby increasing the precision in the height direction.

In addition, since the housing support surfaces 611 and 621 and the stator support surface 381a are formed in stages, there is an advantage that the concentricity of the stator can be easily and precisely combined.

In addition, since the first shaft and the second shaft are separated and coupled to each other to be detachable from each other, the separation between the rotors is easy, and the stator located therebetween can be easily disassembled.

And, by different diameters of the screws of the first coupling hole 412 and the second coupling hole 422, without using a tool such as a separate jig, only bolts having different diameters are used, and a strong attractive force is applied. There is an advantage that electrons can be separated from each other by bonding.

In addition, by using the anti-rotation protrusion 413 and the anti-rotation groove portion 423, it is possible to prevent the first shaft 410 and the second shaft 420 from rotating relative to each other in a coupled state.

And, since the magnet cover is formed on the rotor, it is possible to significantly reduce the work required to form the surface of the permanent magnet 210 formed on the surface facing the stator more uniformly.

In addition, it is possible to prevent the permanent magnet 210 from being separated to the stator side due to strong attractive force and causing a malfunction.

And, when a part of the permanent magnet is partially exposed toward the stator, there is an advantage in that the magnet loss can be reduced.

In the above, preferred embodiments of the present invention have been exemplarily described, but the scope of the present invention is not limited to such specific embodiments, and can be appropriately changed within the scope described in the claims.

100: rotor 120: rotor frame
121: magnetic cover 122: anti-separation ring
123: plurality of ribs 124: rotor hub
3124: position fixing projection 125: permanent magnet seating portion
1125: inner support 210: permanent magnet
300: stator 310: coil
380: coil fixing frame 381: outer rim
381a: stator support surface 383: inner rim
384: stator coil seating portion 385: through hole
386: partition member 387: groove
400: rotation axis 410: first axis
412: first coupling hole 420: second shaft
422: second coupling hole 411, 421: hub plate
413: rotation prevention protrusion 423: rotation prevention groove portion
600: housing 610: first housing
620: second housing 611, 612: housing support surface

Claims (8)

housing;
a rotating shaft rotatably coupled to the housing;
at least one pair of rotors installed spaced apart from each other in the axial direction of the rotation shaft and having a plurality of permanent magnets fixed to opposite surfaces; and
a stator fixed to the housing at a position between the pair of rotors and having a coil wound thereon;
includes,
The housing includes a first housing and a second housing that are separated in the axial direction and are detachable from each other,
The first housing and the second housing each have housing support surfaces supporting both surfaces of the stator. The method of claim 1,
At least one of the pair of rotors is an axial magnetic flux rotating machine, characterized in that detachably coupled to the housing.
3. The method of any one of claims 1 or 2,
The stator is
a plurality of stator coils; and
a coil fixing frame in which a plurality of stator coil seating parts to which the stator coil is fixed are formed;
including,
The coil fixing frame may include an outer rim formed to protrude outward in a radial direction of the stator coil;
Axial magnetic flux rotating machine comprising a.
4. The method of claim 3,
The outer rim is
An axial magnetic flux rotating machine, characterized in that the stator support surface engaged with the housing support surface is formed to protrude in the thickness direction of the stator.
4. The method of claim 3,
The stator support surface is formed in a step,
The axial magnetic flux rotating machine, characterized in that the housing support surface is stepped to engage the stator support surface.
4. The method of claim 3,
The outer rim is an axial magnetic flux rotating machine, characterized in that the through hole is formed to expose at least a portion of the side surface of the coil.
4. The method of claim 3,
The coil fixing frame is
an inner rim formed inside the outer rim; and
a plurality of partition members having one end fixed to the outer rim and one end fixed to the inner rim to form a plurality of the coil receiving portions in a circumferential direction;
Axial magnetic flux rotating machine, characterized in that it further comprises.
4. The method of claim 3,
An axial magnetic flux rotating machine, characterized in that a groove is formed in the outer surface of the outer rim in a radial direction so that the lead wire of the coil can be gripped.

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