CN210806876U

CN210806876U - Rotor assembly and three-rotor motor with same

Info

Publication number: CN210806876U
Application number: CN201922393516.8U
Authority: CN
Inventors: 徐晓东
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-06-19
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a rotor assembly and have three rotor electric machines of rotor assembly. The rotor assembly comprises a stepped shaft, an outer fixed disk, an inner magnetic ring, an outer magnetic ring and a magnetism leakage prevention structure. The stepped shaft is coaxially arranged with the stator core and penetrates through the stator core. The outer fixed disk is sleeved on the stepped shaft, and the stepped shaft penetrates through the outer fixed disk. The inner fixing disc is sleeved on the stepped shaft and comprises a first fixing part and a second fixing part. The inner magnetic ring is sleeved on the first fixing portion and located in the shaft hole, and can generate a first rotating torque which drives the stepped shaft to rotate in an electromagnetic field. The outer magnetic ring is fixed on the inner wall of the outer fixing disc and can generate a second rotating torque which drives the stepped shaft to rotate in an electromagnetic field. The magnetic leakage prevention structure comprises a first magnetic ring and a second magnetic ring. The first magnetic ring is fixed on the second fixing part, and the second magnetic ring is fixed on the closed end, and the first magnetic ring and the second magnetic ring can generate a third rotating torque which drives the stepped shaft to rotate in an electromagnetic field. The utility model provides high electric energy conversion rate plays the effect of magnetic leakage prevention.

Description

Rotor assembly and three-rotor motor with same

Technical Field

The utility model relates to an electrical equipment technical field's a rotor assembly especially relates to a three rotor electric machine's rotor assembly, this three rotor electric machine who designs this rotor assembly.

Background

The excitation winding on the motor rotor is equivalent to a plurality of independent electromagnets, the motor is essentially rotated by centering after the electromagnets interact with another electromagnet or a permanent magnet, experiments show that the magnetic energy of the electromagnets can not realize remote series connection in the iron core, and the electromagnets and the permanent magnet have the centering property except for north and south poles, and the side level between the north and south poles also has the centering property. When the two adjacent electromagnets on the stator of the motor do work, the magnetic energy cannot be connected together in series, each electromagnet on the rotor only has one stage shoe capable of generating attraction and repulsion to the permanent magnet on the rotor, the magnetic energy of the other stage shoe and the magnetic energy of the side stage between the north and south poles of the electromagnet are in an idle state, about sixty percent of energy is not fully utilized, and the actual conversion efficiency of the motor is greatly reduced in the actual application process of the motor.

Therefore, the actual conversion efficiency of the electric energy into the mechanical energy of the existing motor is low, and can reach 70-90% in theory, and can not reach 50% in practice. In order to improve the actual conversion efficiency of the motor, in a common mode, for example, a double-rotor motor fully utilizes the magnetic energy of two poles of a stator of the motor, but the magnetic energy between the north and south poles of the stator of the motor cannot be utilized, so that about twenty percent of the magnetic energy is wasted. Because the rotor assembly of the motor has the phenomenon of magnetic leakage, the acting force of the magnetic field generated by the permanent magnet on the electromagnetic field generated by the winding after the motor is electrified is weakened, the utilization rate of magnetic energy is greatly reduced, and the conversion rate of electric energy is reduced.

SUMMERY OF THE UTILITY MODEL

For solving current motor and having the magnetic leakage and lead to the actual conversion efficiency ratio of electric energy conversion for mechanical energy lower technical problem, the utility model provides a rotor assembly and have the three-rotor electric machine of rotor assembly.

The utility model discloses a following technical scheme realizes: a rotor assembly of a three-rotor motor rotates in an electromagnetic field of a stator assembly of the motor; the stator assembly comprises a stator core for winding at least one group of windings, and the stator core is provided with a shaft hole which is coaxial with the central shaft of the motor; the rotor assembly includes:

a stepped shaft disposed coaxially with the stator core and penetrating the stator core;

the outer fixing disc is sleeved on the stepped shaft, and one end of the outer fixing disc is an open end while the other end of the outer fixing disc is a closed end; the stepped shaft penetrates through the outer fixed disk and forms an annular space with the outer fixed disk;

the inner fixed disc is sleeved on the stepped shaft and comprises a first fixed part and a second fixed part which are coaxially connected; the fixing part is positioned in the annular space, and the fixing part is positioned on one side of the annular space and close to the opening end; and

the inner magnetic ring is sleeved on the first fixing part, is positioned in the shaft hole and can generate a first rotating torque which drives the stepped shaft to rotate in the electromagnetic field;

the outer magnetic ring is fixed on the inner wall of the outer fixed disk and is coaxially arranged with the inner magnetic ring; the outer magnetic ring is sleeved outside the stator core and can generate a second rotating torque which drives the stepped shaft to rotate in the electromagnetic field; and

the magnetism leakage prevention structure comprises a first magnetic ring and a second magnetic ring which are coaxially arranged with the stepped shaft; the first magnetic ring is fixed on the second fixing part and is positioned on one side of the stator core; the second magnetic ring is fixed on the closed end and is positioned on the other side of the stator core; the magnetic poles of the parts, close to the opening end area, of the inner magnetic ring, the outer magnetic ring and the magnetic ring I are the same, the magnetic poles of the parts, close to the closed end area, of the inner magnetic ring, the outer magnetic ring and the magnetic ring II are the same, and a rotating torque III for driving the stepped shaft to rotate can be generated in the electromagnetic field.

The utility model discloses a magnetic ring one of leak protection magnetism structure and the magnetic field of the both sides of magnetic ring two pairs inner magnetic ring and outer magnetic ring are strengthened, can reduce the magnetism and reveal, because the regional electromagnetic field in stator core both ends can drive magnetic ring one and magnetic ring two rotates, just so can utilize the magnetic energy of this part, the magnetic field that makes the stator south north two poles of the earth originally unable to utilize also is used by the rotor assembly, can make the electromagnetic energy fully arouse on the rotor assembly like this, thereby make more electric energy turn into step shaft pivoted mechanical energy, it has the magnetic leakage and lead to the actual conversion efficiency of electric energy conversion for mechanical energy to be than lower technical problem to have solved current motor to have the magnetic leakage, electric energy conversion rate is high, the technological effect of magnetic leakage is prevented.

As a further improvement of the scheme, the annular area of the first magnetic ring accounts for 40% -50% of the annular area of the second magnetic ring.

As a further improvement of the above scheme, the inner magnetic ring comprises a plurality of strip-shaped inner magnetic blocks; the inner magnetic blocks are magnetized along the radial direction of the stepped shaft, and the magnetic poles of the two adjacent inner magnetic blocks are arranged oppositely.

Furthermore, the outer magnetic ring comprises a plurality of arc-shaped outer magnetic blocks which respectively correspond to the plurality of inner magnetic blocks; the outer magnetic blocks are magnetized along the radial direction of the stepped shaft, and the magnetic poles of the two adjacent outer magnetic blocks are arranged oppositely; each outer magnetic block and the corresponding inner magnetic block are positioned in the same radial direction, and the magnetic poles of the two adjacent parts are opposite.

Furthermore, the magnetic ring I comprises a plurality of lateral magnetic blocks I, and the number of the lateral magnetic blocks I is the same as that of the external magnetic blocks; the lateral magnetic blocks I are magnetized along the radial direction of the stepped shaft, and the magnetic poles of the two adjacent lateral magnetic blocks I are arranged oppositely; the magnetic poles of the two parts, close to each adjacent inner magnetic block, of each lateral magnetic block I are the same, and the magnetic poles of the two parts, close to each adjacent outer magnetic block, of each lateral magnetic block I are the same;

the magnetic ring II comprises a plurality of lateral magnetic blocks II, and the number of the lateral magnetic blocks II is the same as that of the external magnetic blocks; the lateral magnetic blocks II are magnetized along the radial direction of the stepped shaft, and the magnetic poles of two adjacent lateral magnetic blocks II are arranged oppositely; and the magnetic poles of the two parts of each lateral magnetic block II, which are close to the adjacent inner magnetic block, are the same, and the magnetic poles of the two parts of each lateral magnetic block II, which are close to the adjacent outer magnetic block, are the same.

As a further improvement of the scheme, the difference value between the inner diameter and the outer diameter of the first magnetic ring is 40% -50% of the difference value between the inner diameter and the outer diameter of the second magnetic ring.

The utility model also provides a three-rotor motor, it includes:

a housing;

the stator assembly is used for electrifying to generate an electromagnetic field and comprises a stator core for winding at least one group of windings; the stator core is fixed in the shell and is provided with a shaft hole which is coaxial with the central shaft of the motor; and

the rotor assembly of any of the three-rotor motors described above is rotatably mounted in a housing; the stepped shaft and the stator core are coaxially arranged; the inner magnetic ring is positioned in the shaft hole and can generate a first rotating torque which drives the stepped shaft to rotate in the electromagnetic field; the outer magnetic ring is sleeved outside the stator core and can generate a second rotating torque which drives the stepped shaft to rotate in the electromagnetic field; the magnetic ring is positioned on one side of the stator core, the magnetic ring is positioned on the other side of the stator core, and a rotating torque III for driving the stepped shaft to rotate can be generated in the electromagnetic field.

As a further improvement of the above scheme, the stator assembly further comprises a first fixing piece, a second fixing piece, a flange plate, a curing agent, a plurality of threaded sleeves and a plurality of bolts; the shell is connected with the stator core through a curing agent; the first fixing piece and the second fixing piece are respectively positioned on two opposite sides of the stator core and are fixed with the curing agent through a part of threaded sleeves; the flange is positioned on one side of the first fixing piece and is fixed with the shell and the first fixing piece through bolts; the second fixing part and the first magnetic ring are located in the flange.

As a further improvement of the scheme, the second fixing piece is separated from the second magnetic ring by 0.2-0.5 mm.

As a further improvement of the above scheme, the outer shell comprises an outer cylinder and two end covers; the two end covers are respectively covered on the two ends of the outer cylinder and are fixed with the outer cylinder through the other part of the threaded sleeve; the stepped shaft penetrates through the outer barrel, and two ends of the stepped shaft are respectively rotatably installed on the two end covers.

Compare in current birotor motor, the utility model discloses a rotor assembly and have the three-rotor motor of rotor assembly has following beneficial effect:

1. according to the rotor assembly of the three-rotor motor, the inner magnetic ring and the outer magnetic ring can continuously rotate under the action of the magnetic field generated by the stator assembly, and the first rotating torque, the second rotating torque and the third rotating torque can be generated simultaneously, so that the electromagnetic field generated by the electromagnet on the stator drives the rotor to utilize magnetic energy at every moment, the electromagnetic energy generated by electric energy is fully utilized, the mechanical energy converted from the magnetic energy is concentrated on the stepped shaft, and the utilization rate of the electric energy by the motor can be improved. Meanwhile, the conversion efficiency of the generator manufactured by utilizing the reverse principle of the motor can be greatly improved, and the ultra-efficient utilization of electric energy is realized.

2. The rotor assembly of the three-rotor motor has the advantages that the magnetic fields on the two sides of the inner magnetic ring and the outer magnetic ring of the magnetic leakage prevention structure of the rotor assembly are enhanced, magnetic leakage can be reduced, the magnetic fields in the two end areas of the stator core can drive the magnetic ring I and the magnetic ring II and the magnetic ring I and the magnetic ring II to rotate simultaneously, so that the magnetic energy of the magnetic energy can be utilized, the magnetic field which cannot be utilized originally between the north and south poles of the stator is fully utilized by the rotor assembly, the electromagnetic energy can be fully excited on the rotor assembly, more electric energy is converted into mechanical energy for rotating the stepped shaft, the electric energy conversion rate is improved, and the magnetic leakage prevention effect is achieved.

3. The inner magnetic ring, the outer magnetic ring, the first magnetic ring and the second magnetic ring of the magnetic leakage prevention structure of the rotor assembly of the three-rotor motor can be respectively composed of a plurality of magnetic blocks, and the magnetic poles between the two adjacent magnetic blocks in each magnetic ring are arranged oppositely, so that the magnetic poles act with an electromagnetic field generated in the stator assembly to drive the stepped shaft to rotate. Meanwhile, because the two adjacent magnetic poles of the magnetic poles between the magnetic rings are the same, for example, the two adjacent magnetic poles of the lateral magnetic block and the adjacent inner magnetic block are the same, the magnetic energy generated by the north and south poles of the stator assembly can be prevented from being leaked, and the magnetic energy of the lateral magnetic ring can be fully utilized.

4. According to the three-rotor motor, the stator assembly, the rotor assembly and the shell can be assembled through the threaded sleeve and the bolt, the assembling process is relatively simple, and large-scale assembling and production of the motor can be facilitated.

Drawings

Fig. 1 is a perspective view of a rotor assembly and a stator core of embodiment 1 of the present invention after being mounted;

FIG. 2 is a perspective view of the rotor assembly of FIG. 1;

FIG. 3 is a perspective view of an outer stationary disk of the rotor assembly of FIG. 2;

FIG. 4 is a perspective view of an inner stationary disk of the rotor assembly of FIG. 2;

FIG. 5 is a perspective view of the inner magnet ring of the rotor assembly of FIG. 2;

FIG. 6 is a perspective view of an outer magnet ring of the rotor assembly of FIG. 2;

FIG. 7 is a perspective view of a first magnet ring of the rotor assembly of FIG. 2;

FIG. 8 is a perspective view of a second magnet ring of the rotor assembly of FIG. 2;

fig. 9 is a perspective view of a three-rotor motor according to embodiment 2 of the present invention;

fig. 10 is a perspective view of an outer cylinder of a housing of the three-rotor motor of fig. 9;

FIG. 11 is a perspective view of one of the end caps of the housing of the three rotor electric machine of FIG. 9;

fig. 12 is a perspective view of another end cap of the housing of the three rotor electric machine of fig. 9;

FIG. 13 is a perspective view of a stator assembly of the three-rotor electric machine of FIG. 9;

FIG. 14 is a perspective view of a stator core of the stator assembly of FIG. 13;

FIG. 15 is a perspective view of a first stator plate or a second stator plate of the stator assembly of FIG. 13;

FIG. 16 is a perspective view of a curing agent of the stator assembly of FIG. 13;

fig. 17 is a perspective view of a flange of the stator assembly of fig. 13.

Description of the symbols:

1 lower cover of outer shell 18

2 step shaft 23 fixed piece 2

4 stator core 24 flange

6 curing agent for external fixing disc 25

7 internal fixing disc 26 thread sleeve

8 inner magnetic ring 27 bolt

9 outer magnetic ring 29 spacing post

10 magnetic ring one 71 fixed part one

11 magnetic ring two 72 fixing part two

12 outer cylinder 81 inner magnet block

13 end cover 91 external magnetic block

14 bearing 101 side magnetic block I

15 fixing piece one 102 positioning hole

16-sleeve 111 lateral magnet II

17 upper cover

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

Referring to fig. 1 and 2, the present embodiment provides a rotor assembly of a three-rotor motor, which rotates in an electromagnetic field of a stator assembly of the motor. The rotor assembly can be used on the existing motor and replace the original rotor assembly, and of course, the rotor assembly can also be used as a separate accessory. The stator assembly comprises a stator core 4 for winding at least one group of windings, and the stator core 4 is provided with a shaft hole which is coaxial with the central shaft of the motor. The rotor assembly comprises a stepped shaft 2, an outer fixed disk 6, an inner fixed disk 7, an inner magnetic ring 8, an outer magnetic ring 9 and a magnetism leakage prevention structure.

The stepped shaft 2 is disposed coaxially with the stator core 4 and penetrates the stator core 4. The stepped shaft 2 is rotatably arranged in the motor shell, namely the stepped shaft 2 is coaxially arranged with the outer contour of the motor. The stepped shaft 2 may be composed of a plurality of sections having different radii to facilitate mounting of the rotor assembly on the stepped shaft 2. The stepped shaft 2 can be made of the existing material for manufacturing the motor rotating shaft. The stepped shaft 2 may be a separate component in some embodiments, while other configurations of the rotor assembly in this embodiment are used as a new rotor mechanism.

Referring to fig. 3, the outer fixing disc 6 is sleeved on the stepped shaft 2, and one end is an open end and the other end is a closed end. The stepped shaft 2 penetrates through the outer fixed disk 6 and forms an annular space with the outer fixed disk 6. The closed end of the external fixed disk 6 is provided with a round hole, and the stepped shaft 2 directly passes through the round hole and is fixed with the external fixed disk 6. When the fixing is performed, the external fixing disk 6 and the stepped shaft 2 are connected by welding, key connection, or the like, but in some embodiments, the external fixing disk 6 and the stepped shaft 2 may be directly integrated into a single structure.

Referring to fig. 4, the inner fixing plate 7 is sleeved on the stepped shaft 2 and includes a first fixing portion 71 and a second fixing portion 72 which are coaxially connected. The first fixing portion 71 is located in the annular space, and the second fixing portion 72 is located at one side of the annular space and close to the opening end. The first fixing portion 71 is a long cylindrical structure, and the inner portion thereof can be directly fixed to the stepped shaft 2, while the outer portion thereof further reduces the annular space. The second fixing portion 72 is a disc-shaped structure, and the outer diameter thereof is larger than that of the first fixing portion 71. In fact, the internal fixation disk 7 is structured like a nail and is inserted in the external fixation disk 6. Of course, in some embodiments, the external fixing disk 6 and the internal fixing disk 7 may be integrally formed, may be integrally connected by welding or the like, and may be fixed relative to each other only by the stepped shaft 2 without contact.

Referring to fig. 5, the inner magnetic ring 8 is sleeved on the first fixing portion 71 and located in the shaft hole, and can generate a first rotation torque in the electromagnetic field to drive the stepped shaft 2 to rotate. In the present embodiment, the inner magnetic ring 8 includes a plurality of inner magnetic blocks 81, and the inner magnetic blocks 81 have a bar shape. The inner magnetic blocks 81 are magnetized along the radial direction of the stepped shaft 2, and the magnetic poles of two adjacent inner magnetic blocks 81 are arranged oppositely. The inner magnetic ring 8 can rotate in the shaft hole of the stator core 4, so that when an alternating magnetic field is generated by the winding on the stator core 4, the inner magnetic ring 8 can generate the rotating torque under the action of the magnetic field so as to utilize electromagnetic energy inside the stator assembly, and the electromagnetic energy of the part can be converted into mechanical energy for rotating the stepped shaft 2.

Referring to fig. 6, the outer magnetic ring 9 is fixed on the inner wall of the outer fixed disk 6 and is coaxially disposed with the inner magnetic ring 8. The outer magnetic ring 9 is sleeved outside the stator core 4 and can generate a second rotating torque which drives the stepped shaft 2 to rotate in an electromagnetic field. In this embodiment, the outer magnetic ring 9 includes a plurality of outer magnetic blocks 91, the plurality of outer magnetic blocks 91 respectively correspond to the plurality of inner magnetic blocks 81, and the outer magnetic blocks 91 are arc-shaped. The outer magnetic blocks 91 are magnetized along the radial direction of the stepped shaft 2, and the magnetic poles of two adjacent outer magnetic blocks 91 are arranged oppositely. Each outer magnetic block 91 and the corresponding inner magnetic block 81 are located in the same radial direction, and the magnetic poles of the two adjacent parts are the same. The outer magnetic ring 9 can rotate outside the side direction of the stator core 4, so that when an alternating magnetic field is generated by a winding on the stator core 4, the outer magnetic ring 9 can rotate under the driving of the acting force of the magnetic field, the rotating torque II is generated, and meanwhile, the electromagnetic energy on the outer side of the stator assembly is utilized, and the electromagnetic energy is converted into the mechanical energy for rotating the stepped shaft 2.

In addition, in the embodiment, the adjacent magnetic poles of the inner magnetic block 81 and the outer magnetic block 91 are opposite, so that the magnetic poles generated at the inner side and the outer side of the stator core 4 are opposite, the inner magnetic block 81 and the outer magnetic block 91 are driven by the electromagnetic field at the same time, and the first rotating torque, the second rotating torque and the third rotating torque can be generated at the same time, so that the electromagnetic field generated by the electromagnet on the stator drives the rotor to utilize magnetic energy at every moment, the electromagnetic energy generated by electric energy is fully utilized, and the mechanical energy converted from the magnetic energy is concentrated on the stepped shaft 2, so that the utilization rate of the electric energy by the motor can be improved. Meanwhile, the conversion efficiency of the generator manufactured by utilizing the reverse principle of the motor can be greatly improved, and the ultra-efficient utilization of electric energy is realized.

Referring to fig. 7 and 8, the magnetic leakage preventing structure includes a first magnetic ring 10 and a second magnetic ring 11, and both the first magnetic ring 10 and the second magnetic ring 11 are disposed coaxially with the stepped shaft 2. The first magnetic ring 10 is fixed on the second fixing part 72 and is positioned at one side of the stator core 4. And the second magnetic ring 11 is fixed on the closed end and is positioned on the other side of the stator core 4. The magnetic poles of the parts, close to the opening end area, of the inner magnetic ring 8, the outer magnetic ring 9 and the magnetic ring I10 are the same, the magnetic poles of the parts, close to the closed end area, of the inner magnetic ring 8, the outer magnetic ring 9 and the magnetic ring II 11 are the same, and a rotating torque III for driving the stepped shaft 2 to rotate can be generated in the electromagnetic field. In this embodiment, the annular area of the first magnetic ring 10 accounts for 40% -50% of the annular area of the second magnetic ring 11. In some embodiments, the difference between the inner diameter and the outer diameter of the first magnetic ring 10 is 40% -50% of the difference between the inner diameter and the outer diameter of the second magnetic ring 11.

Because the electromagnetic fields on the two axial sides of the stator core 4 cannot generate obvious effect on the inner magnetic ring 8 and the outer magnetic ring 9, a large amount of magnetic energy on the north and south poles cannot be used, and because the magnetic leakage prevention structure is arranged in the embodiment, the magnetic fields on the two sides of the inner magnetic ring 8 and the outer magnetic ring 9 are enhanced by the first magnetic ring 10 and the second magnetic ring 11, magnetic leakage can be reduced, and because the electromagnetic fields on the two end regions of the stator core 4 can drive the first magnetic ring 10 and the second magnetic ring 11 to rotate, the magnetic energy of the part can be utilized, the originally unavailable magnetic field between the north and south poles of the stator can be used by the rotor assembly, the electromagnetic energy can be fully excited on the rotor assembly, so that more electric energy is converted into mechanical energy for rotating the stepped shaft 2, the electric energy conversion rate is improved, and the magnetic leakage prevention effect is achieved.

In the embodiment, the magnetic ring one 10 includes a plurality of lateral magnetic blocks one 101, and the number of the lateral magnetic blocks one 101 is the same as that of the outer magnetic blocks 91. The first lateral magnetic blocks 101 are magnetized along the radial direction of the stepped shaft 2, and the magnetic poles of the two adjacent first lateral magnetic blocks 101 are arranged oppositely. The magnetic poles of the two parts of each lateral magnetic block I101, which are close to the adjacent inner magnetic block 81, are the same, and the magnetic poles of the two parts of each lateral magnetic block I, which are close to the adjacent outer magnetic block 91, are the same. The second magnetic ring 11 comprises a plurality of second lateral magnetic blocks 111, and the number of the second lateral magnetic blocks 111 is the same as that of the outer magnetic blocks 91. The second lateral magnetic blocks 111 are magnetized along the radial direction of the stepped shaft 2, and the magnetic poles of the two adjacent second lateral magnetic blocks 111 are arranged oppositely. The magnetic poles of the two parts of each lateral magnetic block II 111, which are close to the adjacent inner magnetic block 81, are the same, and the magnetic poles of the two parts of each lateral magnetic block II are the same as the magnetic poles of the two parts of each lateral magnetic block 91, which are close to the adjacent outer magnetic block.

Because the inner magnetic ring 8, the outer magnetic ring 9, and the first magnetic ring 10 and the second magnetic ring 11 of the magnetic leakage prevention structure can be respectively composed of a plurality of magnetic blocks, and the magnetic poles between the two adjacent magnetic blocks in each magnetic ring are arranged oppositely, the magnetic leakage prevention structure acts with an electromagnetic field generated in the stator assembly so as to drive the stepped shaft 2 to rotate. Meanwhile, because the two adjacent magnetic poles of the magnetic poles between the magnetic rings are the same, for example, the two adjacent magnetic poles of the lateral magnetic block and the adjacent inner magnetic block 81 are the same, the magnetic energy generated by the stator assembly twice in the north and south directions can be prevented from being leaked, and the magnetic energy of the lateral magnetic ring can be fully utilized.

In summary, compared with the existing dual-rotor motor, the rotor assembly of the three-rotor motor of the embodiment has the following advantages:

1. according to the rotor assembly of the three-rotor motor, the inner magnetic ring 8 and the outer magnetic ring 9 can continuously rotate under the action of the magnetic field generated by the stator assembly, and the first rotating torque and the second rotating torque can be generated simultaneously, so that the electromagnetic field generated by the electromagnet on the stator drives the rotor to utilize magnetic energy at every moment, the electromagnetic energy generated by electric energy is fully utilized, the mechanical energy converted from the magnetic energy is concentrated on the stepped shaft 2, and the utilization rate of the electric energy by the motor can be improved. Meanwhile, the conversion efficiency of the generator manufactured by utilizing the reverse principle of the motor can be greatly improved, and the ultra-efficient utilization of electric energy is realized.

2. The magnetic fields on the two sides of the inner magnetic ring 8 and the outer magnetic ring 9 are enhanced by the magnetic ring I10 and the magnetic ring II 11 of the anti-magnetic leakage structure of the rotor assembly of the three-rotor motor, magnetic leakage can be reduced, the magnetic fields in the areas of the two ends of the stator core 4 can drive the magnetic ring I10 and the magnetic ring II 11 to rotate, so that the magnetic energy of the part can be utilized, the magnetic field which cannot be utilized originally between the north and south poles of the stator is also used by the rotor assembly, the electromagnetic energy can be fully excited on the rotor assembly, more electric energy is converted into mechanical energy for rotating the stepped shaft 2, the electric energy conversion rate is further improved, and the effect of preventing magnetic leakage is achieved.

3. The inner magnetic ring 8, the outer magnetic ring 9, the magnetic ring I10 and the magnetic ring II 11 of the magnetic leakage prevention structure of the rotor assembly of the three-rotor motor can be respectively composed of a plurality of magnetic blocks, and the magnetic poles between two adjacent magnetic blocks in each magnetic ring are arranged oppositely, so that the magnetic poles act with an electromagnetic field generated in the stator assembly to drive the stepped shaft to rotate. Meanwhile, because the two adjacent magnetic poles of the magnetic poles between the magnetic rings are the same, for example, the two adjacent magnetic poles of the lateral magnetic block and the adjacent inner magnetic block 81 are the same, the magnetic energy generated between the north and south stages of the stator assembly can be prevented from being leaked, and the magnetic energy of the lateral magnetic ring can be fully utilized.

Example 2

Referring to fig. 9, the present embodiment provides a three-rotor motor, which includes not only the rotor assembly of embodiment 1, but also a housing 1 and a stator assembly. The motor adopts three groups of rotors, and can fully utilize the magnetic energy generated by the stator.

Referring to fig. 10, 11 and 12, in the present embodiment, the housing 1 includes an outer cylinder 12, an end cap 13 and a bearing 14. The outer cylinder 12 is a cylinder structure, and a plurality of positioning holes 102 are formed in a side wall thereof. The number of the end caps 13 is two, and the two end caps 13 are respectively covered on the two ends of the outer cylinder 12. The two bearings 14 correspond to the two end covers 13 respectively, and each bearing 14 is fixed on the corresponding end cover 13 and sleeved on the stepped shaft 2, so that the stepped shaft 2 can rotate relative to the end covers 13. Of course, the outer cylinder 12 and the end cap 13 may be formed as a single piece, and the structure can be divided into two parts that are detachably connected. In this embodiment, the stepped shaft 2 passes through the outer cylinder 12, and one end portion of the stepped shaft 2 protrudes from one of the end caps 13 and is rotatably mounted on the corresponding end cap 13, and the other end portion of the stepped shaft 2 is rotatably mounted on the other end cap 13.

Referring to fig. 13 and 14, the stator assembly is used for generating an electromagnetic field by being energized and includes a stator core 4 around which at least one set of windings is wound. The stator core 4 is fixed in the housing 1 and has a shaft hole coaxially provided with the central shaft of the motor. Of course, in this embodiment, in order to show the structure of the motor more clearly, as shown in fig. 15, 16 and 17, the stator assembly may further include a first fixing piece 15, a second fixing piece 23, a flange 24, a curing agent 25, a plurality of threaded sleeves 26 and a plurality of bolts 27. The housing 1 is connected to the stator core 4 by a curing agent 25. The first fixing piece 15 and the second fixing piece 23 are respectively located on two opposite sides of the stator core 4 and fixed with the curing agent 25 through a part of the threaded sleeve 26. The flange 24 is positioned on one side of the first fixing piece 15 and is fixed with the shell 1 and the first fixing piece 15 through bolts 27. The second fixing portion 72 and the first magnetic ring 10 are located in the flange 24. In the embodiment, the second fixing piece 23 is spaced from the second magnetic ring 11, and the distance is preferably 0.2-0.5 mm.

The three-rotor motor of the embodiment has all the advantages of the rotor assembly in the embodiment 1, and the stator assembly, the rotor assembly and the housing 1 can be assembled through the threaded sleeve 26 and the bolt 27, so that the assembly process is relatively simple, and the large-scale assembly and production of the motor can be facilitated.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A rotor assembly of a three-rotor motor rotates in an electromagnetic field of a stator assembly of the motor; the stator assembly comprises a stator core (4) for winding at least one group of windings, and the stator core (4) is provided with a shaft hole which is coaxial with the central shaft of the motor; characterized in that, the rotor assembly includes:

a stepped shaft (2) which is provided coaxially with the stator core (4) and passes through the stator core (4);

the outer fixing disc (6) is sleeved on the stepped shaft (2), and one end of the outer fixing disc is an open end while the other end of the outer fixing disc is a closed end; the stepped shaft (2) penetrates through the outer fixed disk (6) and forms an annular space with the outer fixed disk (6);

the inner fixed disc (7) is sleeved on the stepped shaft (2) and comprises a first fixed part (71) and a second fixed part (72) which are coaxially connected; the first fixing part (71) is positioned in the annular space, and the second fixing part (72) is positioned on one side of the annular space and close to the opening end; and

the inner magnetic ring (8) is sleeved on the first fixing part (71), is positioned in the shaft hole and can generate a first rotating torque which drives the stepped shaft (2) to rotate in the electromagnetic field;

the outer magnetic ring (9) is fixed on the inner wall of the outer fixed disk (6) and is coaxially arranged with the inner magnetic ring (8); the outer magnetic ring (9) is sleeved outside the stator core (4) and can generate a second rotating torque which drives the stepped shaft (2) to rotate in the electromagnetic field; and

the magnetic leakage prevention structure comprises a first magnetic ring (10) and a second magnetic ring (11) which are coaxially arranged with the stepped shaft (2); the magnetic ring I (10) is fixed on the fixing part II (72) and is positioned at one side of the stator core (4); a second magnetic ring (11) is fixed on the closed end and is positioned on the other side of the stator core (4); the magnetic poles of the parts, close to the opening end region, of the inner magnetic ring (8), the outer magnetic ring (9) and the magnetic ring I (10) are the same, the magnetic poles of the parts, close to the closing end region, of the inner magnetic ring (8), the outer magnetic ring (9) and the magnetic ring II (11) are the same, and a rotating torque III for driving the stepped shaft (2) to rotate can be generated in the electromagnetic field.

2. The rotor assembly of a three-rotor motor according to claim 1, wherein the annular area of the first magnetic ring (10) occupies 40% to 50% of the annular area of the second magnetic ring (11).

3. A rotor assembly of a three-rotor electric machine according to claim 1, wherein the inner magnetic ring (8) comprises a plurality of bar-shaped inner magnetic blocks (81); the inner magnetic blocks (81) are magnetized along the radial direction of the stepped shaft (2), and the magnetic poles of two adjacent inner magnetic blocks (81) are arranged oppositely.

4. A rotor assembly of a three-rotor motor according to claim 3, wherein the outer magnetic ring (9) includes a plurality of outer magnetic blocks (91) having an arc shape corresponding to the plurality of inner magnetic blocks (81), respectively; the outer magnetic blocks (91) are magnetized along the radial direction of the stepped shaft (2), and the magnetic poles of two adjacent outer magnetic blocks (91) are arranged oppositely; each outer magnetic block (91) and the corresponding inner magnetic block (81) are located in the same radial direction, and the magnetic poles of the two adjacent parts are opposite.

5. The rotor assembly of a three-rotor motor according to claim 4, wherein the magnetic ring one (10) comprises a plurality of lateral magnetic blocks one (101), and the number of the lateral magnetic blocks one (101) is the same as that of the outer magnetic blocks (91); the lateral magnetic blocks I (101) are magnetized along the radial direction of the stepped shaft (2), and the magnetic poles of two adjacent lateral magnetic blocks I (101) are arranged oppositely; the magnetic poles of the two parts, close to each other, of each lateral magnetic block I (101) and the adjacent inner magnetic block (81) are the same, and the magnetic poles of the two parts, close to each other, of each lateral magnetic block I are the same as those of the two parts, close to each other, of the adjacent outer magnetic block (91);

the magnetic ring II (11) comprises a plurality of lateral magnetic blocks II (111), and the number of the lateral magnetic blocks II (111) is the same as that of the outer magnetic blocks (91); the lateral magnetic blocks II (111) are magnetized along the radial direction of the stepped shaft (2), and the magnetic poles of two adjacent lateral magnetic blocks II (111) are arranged oppositely; the magnetic poles of the two parts, close to each other, of each lateral magnetic block II (111) and the adjacent inner magnetic block (81) are the same, and the magnetic poles of the two parts, close to each other, of each lateral magnetic block II are the same as those of the two parts, close to each other, of the adjacent outer magnetic block (91).

6. The rotor assembly of a three-rotor motor according to claim 1, wherein the difference between the inner diameter and the outer diameter of the first magnet ring (10) is 40% to 50% of the difference between the inner diameter and the outer diameter of the second magnet ring (11).

7. A three-rotor electric machine, comprising:

a housing (1);

a stator assembly for energising to generate an electromagnetic field and comprising a stator core (4) around which at least one set of windings is wound; the stator core (4) is fixed in the shell (1) and is provided with a shaft hole which is coaxial with the central shaft of the motor; and

a rotor assembly of a three-rotor machine according to any one of claims 1-6, which is rotatably mounted in the housing (1); wherein, the stepped shaft (2) and the stator core (4) are coaxially arranged; the inner magnetic ring (8) is positioned in the shaft hole and can generate a first rotating torque which drives the stepped shaft (2) to rotate in the electromagnetic field; the outer magnetic ring (9) is sleeved outside the stator core (4) and can generate a second rotating torque which drives the stepped shaft (2) to rotate in the electromagnetic field; the magnetic ring I (10) is positioned on one side of the stator core (4), the magnetic ring II (11) is positioned on the other side of the stator core (4), and a rotating torque III for driving the stepped shaft (2) to rotate can be generated in the electromagnetic field.

8. A three-rotor electric machine according to claim 7, wherein the stator assembly further comprises a stator plate one (15), a stator plate two (23), a flange plate (24), a curing agent (25), a plurality of threaded bushings (26), and a plurality of bolts (27); the shell (1) is connected with the stator core (4) through a curing agent (25); the first fixing piece (15) and the second fixing piece (23) are respectively positioned on two opposite sides of the stator core (4) and are fixed with the curing agent (25) through a part of threaded sleeves (26); the flange (24) is positioned on one side of the first fixing piece (15) and is fixed with the shell (1) and the first fixing piece (15) through bolts (27); the second fixing part (72) and the first magnetic ring (10) are positioned in the flange plate (24).

9. A three-rotor motor according to claim 8, wherein the stator two (23) is spaced from the magnetic ring two (11) by a distance of 0.2-0.5 mm.

10. A three-rotor machine according to claim 8, characterized in that the housing (1) comprises an outer cylinder (12) and two end caps (13); the two end covers (13) are respectively covered on the two ends of the outer cylinder (12) and are fixed with the outer cylinder (12) through the other part of the threaded sleeve (26); the stepped shaft (2) penetrates through the outer cylinder (12), and two ends of the stepped shaft are respectively rotatably installed on the two end covers (13).