Rotor, motor, compressor and refrigeration equipment

Abstract

The invention discloses a rotor, a motor, a compressor and refrigeration equipment, the rotor comprises a rotor punching sheet, the rotor punching sheet is provided with a shaft hole and a plurality of structure groups arranged around the shaft hole, and each structure group comprises a magnet groove, a magnetic adjusting structure and a riveting buckle hole. The magnetic adjusting structure and the riveting buckle hole are arranged on one side, far away from the shaft hole, of the magnet groove, the rotor punching sheet is provided with a connecting line from the center of the riveting buckle hole to the center of the shaft hole, and the magnetic adjusting structure is asymmetrically arranged relative to the connecting line. According to the technical scheme, the noise generated by the motor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor, a motor, a compressor, and a refrigeration device. Background Art

[0002] With the progress of society and the development of economy, people's living standards have been significantly improved. When consumers choose refrigeration equipment such as air conditioners and refrigerators, in addition to paying attention to prices, they are also more concerned about the noise problem of refrigeration equipment. The compressor is the core component of refrigeration equipment such as refrigerators and air conditioners, and the motor is the power output component of the compressor. The greater the vibration of the motor, the greater the noise of the motor. The structure of the rotor has a great influence on the noise of the motor. Therefore, optimizing the structure of the motor rotor and reducing the working noise of the compressor are problems that technicians in this field need to solve at present. Summary of the invention

[0003] The main object of the present invention is to provide a rotor aimed at reducing the noise emitted by the electric machine.

[0004] To achieve the above-mentioned purpose, the rotor proposed in the present invention includes a rotor punching, which is provided with an axial hole and a plurality of structural groups arranged around the axial hole, wherein the structural group includes a magnet slot, a magnetic adjustment structure, and a rivet hole, wherein the magnetic adjustment structure and the rivet hole are both arranged on the side of the magnet slot away from the axial hole, the rotor punching has a connecting line from the center of the rivet hole to the center of the axial hole, and the magnetic adjustment structure is asymmetrically arranged with respect to the connecting line.

[0005] Optionally, the connection line does not pass through the magnetic tuning structure.

[0006] Optionally, the magnetic adjustment structure includes a first magnetic adjustment hole and a second magnetic adjustment hole, the first magnetic adjustment hole and the second magnetic adjustment hole are respectively arranged on both sides of the connecting line, the first magnetic adjustment hole is in the shape of a straight bar, and the second magnetic adjustment hole is in the shape of a bent hole with a first section close to the axial hole and a second section away from the axial hole, the first magnetic adjustment hole and the first section are respectively inclined in the direction away from the axial hole toward the direction close to the connecting line, the first magnetic adjustment hole is set at an angle A with the connecting line, the first section is set at an angle B with the connecting line, and A / B>1.

[0007] Optionally, the magnetic tuning structure further includes a third magnetic tuning hole which is symmetrically arranged with respect to the second magnetic tuning hole about the connecting line.

[0008] Optionally, the magnetic tuning structure further includes a fourth magnetic tuning hole which is symmetrically arranged with respect to the first magnetic tuning hole about the connecting line.

[0009] Optionally, in the rotation direction of the rotor, the first magnetic adjustment hole is arranged downstream or upstream of the second magnetic adjustment hole.

[0010] Optionally, the fifth magnetic tuning hole of the magnetic tuning structure, the fifth magnetic tuning hole and the rivet hole are in the shape of an elongated strip, and in the direction away from the shaft hole, the distance between the fifth magnetic tuning hole and the rivet hole gradually decreases.

[0011] Optionally, the fifth magnetic adjustment hole and the rivet hole are arranged at an angle E. 16°≤E≤64°.

[0012] Optionally, the group structure includes a plurality of magnetic adjustment structures and a plurality of rivet holes, and one magnetic adjustment structure is arranged corresponding to one rivet hole.

[0013] The present invention also provides an electric motor, comprising the rotor as described above.

[0014] The present invention also provides a compressor, comprising the aforementioned motor.

[0015] The present invention also provides a refrigeration device, which comprises the above-mentioned compressor.

[0016] In the technical solution of the present invention, the rotor includes a rotor punching, the rotor punching is provided with an axial hole, and a plurality of structure groups arranged around the axial hole, the structure group includes a magnet slot, a magnetic adjustment structure, and a rivet hole, the magnetic adjustment structure and the rivet hole are both arranged on the side of the magnet slot away from the axial hole. The rotor punching has a connecting line from the center of the rivet hole to the center of the axial hole, and the magnetic adjustment structure is asymmetrically arranged about the connecting line. The rivet hole is used for the rivet to pass through, and the rivet is used to connect two adjacent rotor punchings.

[0017] Please refer to Table 1:

[0018]

[0019]

[0020] Table 1

[0021] Table 1 shows the simulation data of the rotor under electromagnetic simulation. It can be seen that the torque pulsation value of the rotor will be lower when the magnetic adjustment structure is asymmetric about the connection line than when it is symmetric, which is conducive to maintaining the torque pulsation of the rotor at a low level, thereby helping to reduce the noise emitted by the motor. It is worth mentioning that the rivet hole can not only be used for rivet installation, but also can be reused to adjust the magnetic field of the motor, avoiding too many holes on the rotor punching, so that the rotor core has a higher structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of a rotor punching sheet of a first embodiment of a rotor of the present invention;

[0024] Figure 2 A schematic structural diagram of a rotor punching sheet according to a second embodiment of a rotor of the present invention;

[0025] Figure 3 A schematic structural diagram of a rotor punching sheet according to a third embodiment of a rotor of the present invention;

[0026] Figure 4 A schematic structural diagram of a rotor punching sheet according to a fourth embodiment of a rotor of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the rotor punching of the fifth embodiment of the rotor of the present invention.

[0028] Description of Figure Numbers:

[0029] Label name Label name 100 Rotor punching 530 The third magnetic hole 200 Shaft hole 540 The fourth magnetic hole 300 Structure Group 550 Fifth magnetic hole 400 Magnet slot 600 Rivet hole 510 The first magnetic hole 700 Connection 520 Second magnetic hole

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or abutment, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] With the progress of society and the development of economy, people's living standards have been significantly improved. When consumers purchase refrigeration equipment such as air conditioners and refrigerators, in addition to paying attention to prices, they are also more concerned about the noise problem of refrigeration equipment. The compressor is the core component of refrigeration equipment such as refrigerators and air conditioners, and the motor is the power output component of the compressor. The greater the vibration of the motor, the greater the noise of the motor. The structure of the rotor has a great influence on the noise of the motor. Therefore, optimizing the structure of the rotor of the motor and reducing the working noise of the compressor are problems that technicians in this field currently need to solve. To this end, the present invention provides a rotor, which is intended to reduce the noise emitted by the motor.

[0036] Reference Figures 1 to 5 In the first to fifth embodiments of the present invention, the rotor includes a rotor punching 100, the rotor punching 100 is provided with an axial hole 200, and a plurality of structure groups 300 arranged around the axial hole 200, the structure group 300 includes a magnet slot 400, a magnetic adjustment structure, and a rivet hole 600, the magnetic adjustment structure and the rivet hole 600 are both arranged on the side of the magnet slot 400 away from the axial hole 200. The rotor punching 100 has a connecting line 700 from the center of the rivet hole 600 to the center of the axial hole 200, and the magnetic adjustment structure is asymmetrically arranged about the connecting line 700. The rivet hole 600 is used for the rivet to pass through, and the rivet is used to connect two adjacent rotor punchings 100.

[0037] Please refer to Table 1:

[0038]

[0039] Table 1

[0040] Table 1 shows the simulation data of the rotor under electromagnetic simulation. It can be seen that the magnetic adjustment structure is asymmetric about the connection line 700 compared to symmetric, and the torque pulsation value of the rotor will be lower, which is conducive to maintaining the torque pulsation of the rotor at a low level, thereby helping to reduce the noise emitted by the motor. It is worth mentioning that the rivet hole 600 can not only be used for rivet installation, but also can be reused to adjust the magnetic field of the motor, avoid too many holes on the rotor punching 100, and make the rotor core have a higher structural strength.

[0041] Without loss of generality, the rotor includes a plurality of rotor sheets 100 , and the plurality of rotor sheets 100 are stacked in the axial direction of the rotor.

[0042] There are many forms in which the magnetic adjustment structure is asymmetrically arranged with respect to the connection line 700. Optionally, in the first to fifth embodiments, the connection line 700 does not pass through the magnetic adjustment structure. In this way, the torque pulsation of the motor can be reduced, thereby reducing the noise emitted by the motor. However, the present design is not limited to this. In other embodiments, the connection line 700 passes through the magnetic adjustment structure. In this way, the torque pulsation of the motor can be reduced, thereby reducing the noise emitted by the motor.

[0043] Optionally, in the first to fourth embodiments, the magnetic adjustment structure includes a first magnetic adjustment hole 510 and a second magnetic adjustment hole 520, and the first magnetic adjustment hole 510 and the second magnetic adjustment hole 520 are respectively arranged on both sides of the connecting line 700, the first magnetic adjustment hole 510 is in a straight strip shape, and the second magnetic adjustment hole 520 is bent to have a first section close to the axial hole 200 and a second section away from the axial hole 200, the first magnetic adjustment hole 510 and the first section are respectively inclined in a direction away from the axial hole 200 toward a direction close to the connecting line 700, the first magnetic adjustment hole 510 is set at an angle A with the connecting line 700, and the first section is set at an angle B with the connecting line 700, and A / B>1.

[0044] The first magnetic adjustment hole 510 is set at an angle A with the connecting line 700, which means that the angle between the side of the first magnetic adjustment hole 510 close to the connecting line 700 and extending along the length direction of the first magnetic adjustment hole 510 and the connecting line 700 is A; the first section is set at an angle B with the connecting line 700, which means that the angle between the side of the first section close to the connecting line 700 and extending along the length direction of the first section and the connecting line 700 is B.

[0045] Please refer to Table 2:

[0046]

[0047] Table 2

[0048] Referring to Table 2, it can be seen that when A / B>1, the torque pulsation is less than 20%, which is beneficial to maintaining the torque pulsation of the rotor at a low level and reducing the noise generated by the motor.

[0049] Optionally, in the second and third embodiments, the magnetic adjustment structure further includes a third magnetic adjustment hole 530 symmetrically arranged with the second magnetic adjustment hole 520 about the connecting line 700. This is beneficial for the motor magnetic field to converge, so as to increase the load of the motor.

[0050] Optionally, in the fourth embodiment, the magnetic adjustment structure further includes a fourth magnetic adjustment hole 540 symmetrically arranged with the first magnetic adjustment hole 510 about the connecting line 700. This is beneficial for converging the magnetic field of the motor to increase the load of the motor.

[0051] There are many relative positions of the first magnetic adjustment hole 510 and the second magnetic adjustment hole 520. Optionally, in the first embodiment, in the rotation direction of the rotor, the first magnetic adjustment hole 510 is arranged downstream of the second magnetic adjustment hole 520. However, the present design is not limited thereto. In other embodiments, the first magnetic adjustment hole 510 is arranged upstream of the second magnetic adjustment hole 520.

[0052] Optionally, in the fifth embodiment, the fifth magnetic adjustment hole 550 of the magnetic adjustment structure, the fifth magnetic adjustment hole 550 and the rivet hole 600 are in the shape of an elongated strip, and in the direction away from the shaft hole 200, the distance between the fifth magnetic adjustment hole 550 and the rivet hole 600 gradually decreases. The fifth magnetic adjustment hole 550 and the rivet hole 600 are arranged at an angle E. It should be noted that the fifth magnetic adjustment hole 550 and the rivet hole 600 are arranged at an angle E, which means that the side of the fifth magnetic adjustment hole 550 close to the rivet hole 600 and extending along the length direction of the fifth magnetic adjustment hole 550 is arranged at an angle E with the side of the rivet hole 600 close to the fifth magnetic adjustment hole 550 and extending along the length direction of the rivet hole 600.

[0053] Please refer to Table 3:

[0054] E Figure 5 Torque ripple of the embodiment 16° 19.34％ 24° 19.17％ 32° 19.52％ 40° 20.09％ 48° 20.66％ 56° 21.74％ 64° 21.74％ 72° 22.21％ 80° 22.53％ 88° 22.74％ 96° 22.84％ 104° 22.85％ 112° 22.73％

[0055] Table 3

[0056] Referring to Table 3, it can be seen that the fifth magnetic tuning hole 550 of the magnetic tuning structure, the fifth magnetic tuning hole 550 and the rivet hole 600 are in the shape of long strips, and in the direction away from the shaft hole 200, the distance between the fifth magnetic tuning hole 550 and the rivet hole 600 gradually decreases, which is beneficial to making the torque pulsation of the rotor less than 25%, that is, the torque pulsation is maintained at a low level, which is beneficial to reducing the noise emitted by the generator.

[0057] Furthermore, in the fifth embodiment, 16°≤E≤64°. In this way, the torque pulsation of the rotor is less than 22%, so that the torque pulsation of the rotor is maintained at a relatively low level, which is beneficial to reducing the noise generated by the generator.

[0058] Optionally, in the first to fifth embodiments, the group structure includes a plurality of magnetic adjustment structures and a plurality of rivet holes 600, and one magnetic adjustment structure is provided corresponding to one rivet hole 600. In this way, the torque pulsation of the motor can be effectively reduced, thereby reducing the noise emitted by the motor.

[0059] The present invention also proposes a motor, which includes the above-mentioned rotor. The specific structure of the rotor refers to the above-mentioned embodiment. Since this motor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0060] The present invention also proposes a compressor, which includes the above-mentioned motor. The specific structure of the motor refers to the above-mentioned embodiment. Since the compressor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0061] The present invention also proposes a refrigeration device, which includes the above-mentioned compressor. The specific structure of the compressor refers to the above-mentioned embodiment. Since the refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0062] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A rotor, characterized in that: The rotor includes a rotor punching sheet, which is provided with an axial hole and a plurality of structure groups arranged around the axial hole, wherein the structure group includes a magnet slot, a magnetic adjustment structure, and a rivet hole, wherein the magnetic adjustment structure and the rivet hole are both arranged on a side of the magnet slot away from the axial hole, and the rotor punching sheet has a connecting line from the center of the rivet hole to the center of the axial hole, and the magnetic adjustment structure is asymmetrically arranged with respect to the connecting line.

2. The rotor according to claim 1, characterized in that The connection line does not pass through the magnetic tuning structure.

3. The rotor according to claim 2, characterized in that The magnetic adjustment structure includes a first magnetic adjustment hole and a second magnetic adjustment hole, the first magnetic adjustment hole and the second magnetic adjustment hole are respectively arranged on both sides of the connecting line, the first magnetic adjustment hole is in a straight strip shape, and the second magnetic adjustment hole is in a bent shape to have a first section close to the axial hole and a second section away from the axial hole, the first magnetic adjustment hole and the first section are respectively inclined in a direction away from the axial hole toward a direction close to the connecting line, the first magnetic adjustment hole is arranged at an angle A with the connecting line, the first section is arranged at an angle B with the connecting line, and A / B>1.

4. The rotor according to claim 3, characterized in that The magnetic tuning structure further includes a third magnetic tuning hole which is symmetrically arranged with respect to the second magnetic tuning hole about the connecting line.

5. The rotor according to claim 3, characterized in that The magnetic tuning structure further includes a fourth magnetic tuning hole which is symmetrically arranged with respect to the first magnetic tuning hole with respect to the connecting line.

6. The rotor according to claim 3, characterized in that In the rotation direction of the rotor, the first magnetic adjustment hole is arranged downstream or upstream of the second magnetic adjustment hole.

7. The rotor according to claim 1, characterized in that The magnetic tuning structure has a fifth magnetic tuning hole, and the fifth magnetic tuning hole and the rivet hole are in the shape of long strips. In the direction away from the shaft hole, the distance between the fifth magnetic tuning hole and the rivet hole gradually decreases.

8. The rotor according to claim 7, characterized in that The fifth magnetic adjustment hole and the rivet hole are arranged at an included angle E. 16°≤E≤64°.

9. The rotor according to any one of claims 1 to 8, characterized in that The group structure includes a plurality of magnetic adjustment structures and a plurality of rivet holes, and one magnetic adjustment structure is arranged corresponding to one rivet hole.

10. A motor, characterized in that: Comprising a rotor as claimed in any one of claims 1 to 9.

11. A compressor, characterized in that: Comprising the motor as claimed in claim 10.

12. A refrigeration device, characterized in that: Comprising the compressor of claim 11.

Images