CN113381541B

CN113381541B - Rotor assembly and motor

Info

Publication number: CN113381541B
Application number: CN202110719249.8A
Authority: CN
Inventors: 李磊; 高晓峰; 李庆
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-09-30
Anticipated expiration: 2041-06-28
Also published as: CN113381541A

Abstract

The application provides a rotor assembly and a motor. The rotor assembly comprises a rotor, a rotor cover and a rotor core, wherein the rotor comprises a damping part and an electromagnetic part, and the damping part is arranged in the electromagnetic part; the damping part comprises a first iron core and a second iron core which are sequentially arranged from inside to outside, and a first damping material layer is filled between the first iron core and the second iron core; the electromagnetism portion is equipped with the magnetic shoe groove including third iron core and magnetic shoe in the third iron core, the magnetic shoe is established in the magnetic shoe groove. The rotor is divided into an inner part structure and an outer part structure, the inner damping part is provided with the first iron core and the second iron core which are sleeved, and the damping material layer is arranged between the two parts of iron cores, so that the vibration generated in the high-speed operation process of the rotor can be effectively reduced, and the damping effect is good.

Description

Rotor assembly and motor

Technical Field

The application belongs to the technical field of motors, and particularly relates to a rotor assembly and a motor.

Background

Permanent magnet dc motors have been widely used in various fields in recent years due to their simple structure and high efficiency. The rotor of the permanent magnet direct current motor is divided into a surface-mounted type and an embedded type by more applied structures, and compared with the surface-mounted rotor, the embedded type has the obvious advantages of reducing demagnetization of armature reaction and protecting centrifugal force during high-speed operation, and is more suitable for weak magnetic control of the motor. In addition, the embedded structure has a magnetic gathering effect, and the air gap flux density is increased.

The traditional embedded rotor vibrates more obviously when leading to the high-speed rotation of rotor because of the design is improper, and the motor noise is increased, influences the motor wholeness ability.

Disclosure of Invention

Therefore, this application lies in providing a rotor subassembly and motor, can solve among the prior art embedded rotor and lead to the rotor to vibrate more obviously when rotating at a high speed because of the design is not reasonable, increase the motor noise, influence the problem of motor overall performance.

In order to solve the above problems, the present application provides a rotor assembly including:

the rotor comprises a damping part and an electromagnetic part, and the damping part is arranged in the electromagnetic part;

the damping part comprises a first iron core and a second iron core which are sequentially arranged from inside to outside, and a first damping material layer is filled between the first iron core and the second iron core;

the electromagnetic part comprises a third iron core and a magnetic shoe, wherein a magnetic shoe groove is formed in the third iron core, and the magnetic shoe is arranged in the magnetic shoe groove.

Optionally, a first boss is disposed on an outer peripheral wall of the first core.

Optionally, a second boss is arranged on the inner peripheral wall of the second iron core, and the first boss and the second boss are arranged in a staggered manner.

Optionally, the cross-sectional shape of the first boss and/or the second boss comprises a semi-circle.

Optionally, a second damping material layer is filled between the damping portion and the electromagnetic portion.

Optionally, the second damping material layer comprises a plastic injection layer and a damping rubber layer which are stacked.

Optionally, a through hole is formed in the second iron core in the radial direction, so that the first damping material layer and the second damping material layer are communicated with each other.

Optionally, a third boss is arranged on the peripheral wall of the second iron core, and the third boss and the magnetic shoe are located in the same diameter direction of the rotor.

Optionally, the cross-sectional shape of the third boss comprises a trapezoid.

Optionally, the maximum diameter of the second core is Φ B2, the minimum diameter is Φ B1, and the radial height of the third boss is h, where h is (Φ B2- Φ B1)/2k, and k is a constant.

Optionally, the inner bridge and the outer bridge of the third core are both set to open.

According to another aspect of the present application, there is provided an electric machine comprising a rotor assembly as described above.

The present application provides a rotor assembly comprising: the rotor comprises a damping part and an electromagnetic part, and the damping part is arranged in the electromagnetic part; the damping part comprises a first iron core and a second iron core which are sequentially arranged from inside to outside, and a first damping material layer is filled between the first iron core and the second iron core; the electromagnetic part comprises a third iron core and a magnetic shoe, wherein a magnetic shoe groove is formed in the third iron core, and the magnetic shoe is arranged in the magnetic shoe groove.

The rotor is divided into an inner part structure and an outer part structure, the inner damping part is provided with the first iron core and the second iron core which are sleeved, and the damping material layer is arranged between the two parts of iron cores, so that the vibration generated in the high-speed operation process of the rotor can be effectively reduced, and the damping effect is good.

Drawings

FIG. 1 is a cross-sectional view of a rotor assembly of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a shock absorbing part according to an embodiment of the present application;

FIG. 3 is a schematic view of a connection structure of a damper portion and an electromagnetic portion according to an embodiment of the present application;

fig. 4 is a schematic view of a connection structure of the damper portion and the electromagnetic portion according to the embodiment of the present application.

The reference numbers are given as:

1. a first iron core; 11. a first boss; 2. a second iron core; 21. a second boss; 22. a third boss; 23. a through hole; 3. a third iron core; 4. a magnetic shoe; 5. a first damping material layer; 6. a second damping material layer; 7. and injecting a plastic layer.

Detailed Description

Referring collectively to fig. 1-4, according to an embodiment of the present application, a rotor assembly includes:

the damping part comprises a first iron core 1 and a second iron core 2 which are sequentially arranged from inside to outside, and a first damping material layer 5 is filled between the first iron core 1 and the second iron core 2;

the electromagnetism portion is including third iron core 3 and magnetic shoe 4, be equipped with 4 grooves of magnetic shoe in the third iron core 3, magnetic shoe 4 is established in 4 grooves of magnetic shoe.

The rotor is composed of a damping part and an electromagnetic part, and the damping part is arranged in the electromagnetic part; and the shock absorption portion includes first iron core 1 and second iron core 2 from inside to outside, and fill first damping material layer 5 between first iron core 1 and second iron core 2, because first iron core 1 and second iron core 2 connect as an organic wholely through flexible material, first damping material layer 5 can be the damping rubber layer for the shock absorption portion has the shock attenuation effect, makes the vibration via rotor and pivot transmission obtain weakening greatly, therefore the shock attenuation is effectual.

In some embodiments, the outer peripheral wall of the first core 1 is provided with a first boss 11.

Set up first boss 11 on the periphery wall of first iron core 1, can play the area of contact with first damping material layer 5, improve the structural strength of first damping material layer 5 and first iron core 1.

In some embodiments, the second iron core 2 is provided with a second boss 21 on the inner peripheral wall thereof, and the first boss 11 and the second boss 21 are arranged in a staggered manner.

The second boss 21 can be arranged on the inner peripheral wall of the second iron core 2, so that the structural strength of the first damping material layer 5 and the second iron core 2 can be improved; the first bosses 11 and the second bosses 21 are arranged in a staggered manner, which means that the first bosses 11 are arranged between two adjacent second bosses 21, wherein the first bosses 11 can extend to positions between two adjacent second bosses 21 along the radial direction, so that the structural strength of the shock absorption part is enhanced. Preferably, the cross-sectional shape of the first boss 11 and/or the second boss 21 comprises a semi-circle, but other shapes may be used.

The structure of the shock absorption part shown in fig. 2 comprises a first iron core 1 and a second iron core 2, wherein a semicircular first boss 11 is arranged on the peripheral wall of the first iron core 1, the maximum outer diameter of the first iron core 1 is phi C, the radius of the first boss 11 is R1, the first boss 11 is provided with a plurality of uniformly distributed outer circumferences along the first iron core 1, and the size of the first boss satisfies: r1 is less than or equal to 1mm, 12mm < phi C <14 mm. And the second boss 21 on the inner side of the second core 2 has a semicircular structure in which a radius R2 is defined, and the minimum inner diameter of the second core 2 is Φ B1, which satisfies the following dimensions: phi B1 is less than 18mm, phi B1-phi C is more than or equal to 2mm, and R2 is equal to R1 in number.

In some embodiments, the second damping material layer 6 is filled between the damping portion and the electromagnet portion.

And a second damping material layer 6 is filled between the damping part and the electromagnetic part, so that the damping effect of the rotor is further improved.

In some embodiments, the second damping material layer 6 comprises a stack of an injection plastic layer 7 and a damping rubber layer.

The second damping material layer 6 can be set as a damping rubber layer, and can also be set as a composite layer structure formed by overlapping the injection molding material layer 7 and the damping rubber layer, so that the damping effect can be achieved.

In some embodiments, the second core 2 is provided with a through hole 23 in a radial direction so that the first damping material layer 5 and the second damping material layer 6 are perforated.

Because the inside and outside both sides of second iron core 2 all are equipped with damping material layer, for filling, and strengthen the holistic structural strength of rotor, set up radial through-hole 23 that link up on the second iron core 2 for two-layer damping material can communicate each other.

Based on the iron core is formed by lamination of punching sheets, through holes 23 can be formed in the multiple layers of punching sheets, and the through holes 23 in adjacent punching sheets can be overlapped or arranged in a staggered mode.

In some embodiments, a third boss 22 is provided on the outer circumferential wall of the second core 2, and the third boss 22 and the magnetic shoe 4 are located in the same diameter direction of the rotor. Preferably, the cross-sectional shape of the third boss 22 includes a trapezoid.

The third boss 22 is arranged on the outer peripheral wall of the second iron core 2, so that the connection strength of the second iron core 2 and the second damping material layer 6 is improved, wherein the third boss 22 and the magnetic shoe 4 are located on the same diameter direction of the rotor, the third boss 22 can be in direct contact with the magnetic shoe 4, or a gap exists between the third boss 22 and the magnetic shoe 4, for example, the gap is filled with injection molding materials and the like, and the third boss 22 also plays a role in limiting the magnetic shoe 4.

And the maximum outer diameter of the second iron core 2 is phi B2, and the size satisfies: phi B2 is less than or equal to 25mm, and phi B2-phi B1 is more than or equal to 6 mm.

In some embodiments, the second core 2 has a maximum diameter Φ B2 and a minimum diameter Φ B1, and the third boss 22 has a radial height h, where h is (Φ B2- Φ B1)/2k, and k is a constant.

The k value is adjusted according to the actual situation that the third boss 22 is in direct contact with the magnetic shoe 4 or the third boss 22 and the magnetic shoe 4 are arranged in a gap, so as to adjust the height of the third boss 22.

The number of the first bosses 11, the second bosses 21 and the third bosses 22 is set, wherein the number of the first bosses 11 is the same as that of the second bosses 21, and the first bosses 11 and the second bosses 21 are uniformly set; the number of the third bosses 22 is 2P, P is the number of pole pairs of the rotor, and is uniformly distributed along the circumferential direction (360/2P) ° along the outer circumferential wall of the second core 2.

In some embodiments, both the inner and outer bridges of the third core 3 are set to be open.

A magnetic shoe 4 groove for mounting the magnetic shoe 4 is arranged on the third iron core 3 in the electromagnetic part, and magnetic bridges at two ends of the magnetic shoe 4 are arranged in a disconnected mode; the integral structure of the electromagnetic part is formed by splicing a third iron core 3 and magnetic tiles 4 at intervals, and the magnetic poles of two adjacent magnetic tiles 4 are the same.

The motor adopts foretell rotor subassembly, can improve the shock attenuation effect of motor. In the production process, the outside of the whole rotor assembly is required to be coated with plastic, so that the structural strength is improved.

It is easily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be regarded as the protection scope of the present application.

Claims

1. A rotor assembly, comprising:

the damping part comprises a first iron core (1) and a second iron core (2) which are sequentially arranged from inside to outside, and a first damping material layer (5) is filled between the first iron core (1) and the second iron core (2);

the electromagnetic part comprises a third iron core (3) and a magnetic shoe (4), a magnetic shoe groove is formed in the third iron core (3), and the magnetic shoe (4) is arranged in the magnetic shoe groove;

a second damping material layer (6) is filled between the damping part and the electromagnetic part;

and a through hole (23) is formed in the second iron core (2) along the radial direction, so that the first damping material layer (5) and the second damping material layer (6) are communicated with each other.

2. The rotor assembly according to claim 1, wherein the outer peripheral wall of the first core (1) is provided with a first boss (11).

3. The rotor assembly according to claim 2, wherein the second boss (21) is arranged on the inner peripheral wall of the second iron core (2), and the first boss (11) and the second boss (21) are arranged in a staggered manner.

4. A rotor assembly as claimed in claim 3, wherein the cross-sectional shape of the first boss (11) and/or the second boss (21) comprises a semi-circle.

5. The rotor assembly according to claim 1, wherein the second layer of damping material (6) comprises a stack of an injection moulded layer (7) and a layer of damping rubber.

6. The rotor assembly according to claim 1, wherein the outer peripheral wall of the second iron core (2) is provided with a third boss (22), and the third boss (22) and the magnetic shoe (4) are positioned in the same diameter direction of the rotor.

7. The rotor assembly of claim 6, wherein the cross-sectional shape of the third boss (22) comprises a trapezoid.

8. The rotor assembly according to claim 7, wherein the second core (2) has a maximum diameter of Φ B2, a minimum diameter of Φ B1, and a radial height of the third boss (22) is h, wherein h = (Φ B2- Φ B1)/2k, k is constant.

9. The rotor assembly according to claim 1, characterized in that the inner and outer bridges of the third core (3) are set to be open.

10. An electrical machine comprising a rotor assembly as claimed in any one of claims 1 to 9.