Motor rotor, motor and compressor

Abstract

The present invention provides a motor rotor, a motor and a compressor. The motor rotor comprises a rotor core, a first balancing piece and a second balancing piece. The rotor core is provided with a first balancing hole and a second balancing hole. The first balancing piece is inserted into the first balancing hole, and the second balancing piece is inserted into the second balancing hole, so that the motor rotor can achieve torque balance under the action of the first balancing piece and the second balancing piece. This structure of embedding the balancing piece in the rotor core can not only play the role of balancing the torque, but also avoid the increase of the volume of the motor rotor, thereby avoiding the increase of the overall volume of the compressor. Moreover, the first balancing hole and the second balancing hole are symmetrically arranged relative to the center line of the rotor core. This symmetrically arranged balancing hole structure can make the air gap magnetic circuit of the motor having the motor rotor symmetrical to form a symmetrical air gap magnetic density, so that the motor having the motor rotor can generate a balanced magnetic torque.

Description

Technical Field

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

[0002] At present, for the motor rotor of the scroll compressor with a large eccentric mass in the prior art, a balancing block is provided to balance the torque.

[0003] However, the greater the eccentricity, the larger the volume of the balance block, which makes the overall volume of the compressor larger and increases the production cost; and, the larger volume of the balance block will lead to increased windage loss, thereby reducing the efficiency of the compressor. Summary of the invention

[0004] The main purpose of the present invention is to provide a motor rotor, a motor and a compressor to solve the problem of the overall large volume of the compressor in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a motor rotor is provided, which includes: a rotor core, a first balancing hole and a second balancing hole are opened on the rotor core; a first balancing piece, the first balancing piece is inserted in the first balancing hole; a second balancing piece, the second balancing piece is inserted in the second balancing hole; wherein the first balancing hole and the second balancing hole both extend along the extension direction of the rotor core; and the first balancing hole and the second balancing hole are symmetrically arranged relative to the center line of the rotor core.

[0006] Further, the first balancing piece is a strip-shaped structure, and the cross-section of the first balancing piece is an arc-shaped surface; the first balancing hole is a strip-shaped hole, and the cross-section of the first balancing hole is an arc-shaped surface matching the cross-section of the first balancing piece; and / or, the second balancing piece is a strip-shaped structure, and the cross-section of the second balancing piece is an arc-shaped surface; the second balancing hole is a strip-shaped hole, and the cross-section of the second balancing hole is an arc-shaped surface matching the cross-section of the second balancing piece.

[0007] Further, along the extension direction of the rotor core, the length of the first balance piece is less than or equal to the length of the first balance hole, and / or the length of the second balance piece is less than or equal to the length of the second balance hole, and / or the length of the first balance piece is greater than the length of the second balance piece.

[0008] Furthermore, a plurality of flow holes for fluid circulation are provided on the rotor core, and the plurality of flow holes are arranged at intervals around the circumference of the rotor core, and each flow hole passes through both ends of the rotor core.

[0009] Furthermore, the motor rotor also includes two baffles, which are respectively arranged at both ends of the rotor core, and each baffle is provided with a plurality of through holes, and the plurality of through holes of each baffle are connected with the plurality of flow holes in a one-to-one correspondence.

[0010] Furthermore, the motor rotor also includes a main balancing block and a secondary balancing block, which are respectively arranged at both ends of the rotor core; wherein the main balancing block is arranged opposite to one end of the first balancing piece, and the secondary balancing block is arranged opposite to one end of the second balancing piece.

[0011] Furthermore, the main balancing block and the auxiliary balancing block are symmetrically arranged around the center line of the rotor core; the outer peripheral wall of the main balancing block and the outer peripheral wall of the auxiliary balancing block are both flush with the outer peripheral wall of the rotor core.

[0012] Furthermore, the first balancing hole and the second balancing hole are arranged in pairs to form a balancing hole group, there are multiple balancing hole groups, and the multiple balancing hole groups are arranged at intervals around the center line of the rotor core; the first balancing piece and the second balancing piece are arranged in pairs to form a balancing piece group, there are multiple balancing piece groups, and the multiple balancing piece groups are arranged one-to-one correspondingly to the multiple balancing hole groups.

[0013] According to another aspect of the present invention, a motor is provided. The motor includes a motor rotor and a motor stator that cooperate with each other. The motor rotor is the motor rotor mentioned above.

[0014] According to another aspect of the present invention, a compressor is provided. The compressor includes a motor, and the motor is the motor described above.

[0015] According to the technical solution of the present invention, the motor rotor comprises a rotor core, a first balancing piece and a second balancing piece; the rotor core is provided with a first balancing hole and a second balancing hole, the first balancing piece is inserted in the first balancing hole, and the second balancing piece is inserted in the second balancing hole; that is, by providing the first balancing hole and the second balancing hole on the rotor core, and inserting the first balancing piece and the second balancing piece in the corresponding first balancing hole and the second balancing hole respectively, the motor rotor can achieve torque balance under the action of the first balancing piece and the second balancing piece, compared with arranging a balancing block on the outside of the rotor core to balance the torque of the motor rotor, this structure of embedding the balancing piece in the rotor core can not only play the role of balancing the torque, but also avoid the increase in the volume of the motor rotor, and also avoid the increase in the weight of the motor rotor, thereby avoiding the increase in the overall volume of the compressor; it can be seen that the motor rotor can solve the problem of the overall large volume of the compressor in the prior art.

[0016] Moreover, the first balancing hole and the second balancing hole both extend along the extension direction of the rotor core; the first balancing hole and the second balancing hole are symmetrically arranged relative to the center line of the rotor core, so that the first balancing piece inserted in the first balancing hole and the second balancing piece inserted in the second balancing hole are symmetrically arranged relative to the center line of the rotor core. Compared with the asymmetrically arranged balancing hole structure, this symmetrically arranged balancing hole structure can make the air gap magnetic circuit of the motor having the motor rotor symmetrical to form a symmetrical air gap magnetic density, so that the motor having the motor rotor can generate a balanced magnetic torque to avoid unnecessary vibration and noise of the motor having the motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of an optional motor rotor structure according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 The exploded structure diagram of the motor rotor in FIG.

[0020] Figure 3 Shows Figure 1 Schematic diagram of fluid flow in the motor rotor;

[0021] Figure 4 Shows Figure 1 A schematic diagram of the relative arrangement between the first balancing member and the main balancing block of the motor rotor;

[0022] Figure 5 Shows Figure 1 A schematic diagram of the relative arrangement of the second balancing member and the auxiliary balancing block of the motor rotor;

[0023] Figure 6 Shows Figure 1 A schematic structural diagram of a first balancing member of a motor rotor;

[0024] Figure 7 Shows Figure 1 A schematic structural diagram of a second balancing member of a motor rotor;

[0025] Figure 8 Shows that there is Figure 1 An example diagram of the air gap flux density formed by the motor rotor in the motor.

[0026] The above drawings include the following reference numerals:

[0027] 100. Motor rotor;

[0028] 10. Rotor core; 11. First balance hole; 12. Second balance hole; 13. Flow hole; 14. Fastening hole; 15. Magnetic steel hole;

[0029] 21. a first balancing member; 22. a second balancing member;

[0030] 30. baffle; 31. through hole; 32. fixing hole;

[0031] 41. Main balance block; 42. Auxiliary balance block. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] The present invention provides a motor rotor 100, please refer to Figures 1 to 7 The motor rotor 100 includes a rotor core 10, a first balancing piece 21 and a second balancing piece 22; a first balancing hole 11 and a second balancing hole 12 are opened on the rotor core 10, the first balancing piece 21 is inserted in the first balancing hole 11, and the second balancing piece 22 is inserted in the second balancing hole 12; wherein the first balancing hole 11 and the second balancing hole 12 both extend along the extension direction of the rotor core 10; the first balancing hole 11 and the second balancing hole 12 are symmetrically arranged relative to the center line of the rotor core 10.

[0034] In the motor rotor 100 of the present invention, by setting the first balancing hole 11 and the second balancing hole 12 on the rotor core 10, and inserting the first balancing piece 21 and the second balancing piece 22 into the corresponding first balancing hole 11 and the second balancing hole 12, the motor rotor 100 achieves torque balance under the action of the first balancing piece 21 and the second balancing piece 22. Compared with setting a balancing block outside the rotor core 10 to balance the torque of the motor rotor, this structure of embedding the balancing piece in the rotor core 10 can not only play the role of balancing the torque, but also avoid the increase of the volume of the motor rotor 100, and also avoid the increase of the weight of the motor rotor 100, thereby avoiding the increase of the overall volume of the compressor having the motor including the motor rotor 100; it can be seen that the motor rotor 100 can solve the problem of the large overall volume of the compressor in the prior art. The reduction of the overall volume of the compressor reduces the space occupied by the compressor, which is conducive to the miniaturization of the compressor.

[0035] Furthermore, the first balancing hole 11 and the second balancing hole 12 are arranged symmetrically with respect to the center line of the rotor core 10, so that the first balancing piece 21 inserted in the first balancing hole 11 and the second balancing piece 22 inserted in the second balancing hole 12 are arranged symmetrically with respect to the center line of the rotor core 10, as shown in FIG. Figure 8 As shown, compared with the asymmetrically arranged balancing hole structure, this symmetrically arranged balancing hole structure can make the air gap magnetic circuit of the motor having the motor rotor 100 symmetrical to form a symmetrical air gap magnetic density, so that the motor having the motor rotor 100 can generate a balanced magnetic torque to avoid unnecessary vibration and noise generated by the motor having the motor rotor 100.

[0036] in, Figure 8 The air gap flux density diagram in is an air gap flux density diagram of the air gap part of the motor with the motor rotor 100 obtained by using ansoft electromagnetic simulation software. The horizontal axis in the figure is the arc length of different parts on one of the concentric circles between the motor rotor 100 and the stator of the motor along the radial direction of the rotor core 10 of the motor, and the center of the concentric circle is located on the axis of the rotor core 10. The vertical axis in the figure is the air gap flux density between the motor rotor 100 and its stator corresponding to different arc lengths.

[0037] It should be noted that the first balancing hole 11 and the second balancing hole 12 are symmetrically arranged relative to the center line of the rotor core 10, that is, the first balancing hole 11 can overlap with the second balancing hole 12 after rotating 180 degrees, and the second balancing hole 12 can overlap with the first balancing hole 11 after rotating 180 degrees.

[0038] Specifically, the first balancing piece 21 is a strip-shaped structure, and the cross section of the first balancing piece 21 is an arc-shaped surface; the first balancing hole 11 is a strip-shaped hole, and the cross section of the first balancing hole 11 is an arc-shaped surface matching the cross section of the first balancing piece 21; and / or, the second balancing piece 22 is a strip-shaped structure, and the cross section of the second balancing piece 22 is an arc-shaped surface; the second balancing hole 12 is a strip-shaped hole, and the cross section of the second balancing hole 12 is an arc-shaped surface matching the cross section of the second balancing piece 22. Optionally, the cross sections of the first balancing hole 11 and the second balancing hole 12 are the same in shape and size; the first balancing piece 21 and the second balancing piece 22 are both made of non-magnetic conductive materials.

[0039] Among them, the cross-section of the first balancing piece 21 is the cross-section of the first balancing piece 21 perpendicular to its extension direction, the cross-section of the second balancing piece 22 is the cross-section of the second balancing piece 22 perpendicular to its extension direction, and the extension direction of the first balancing piece 21 and the extension direction of the second balancing piece 22 are both the same as the extension direction of the rotor core 10; the cross-section of the first balancing hole 11 is the cross-section of the inner wall of the first balancing hole 11 perpendicular to its extension direction, and the cross-section of the second balancing hole 12 is the cross-section of the inner wall of the second balancing hole 12 perpendicular to its extension direction.

[0040] In this embodiment, along the extension direction of the rotor core 10, the length of the first balancing piece 21 is less than or equal to the length of the first balancing hole 11 to prevent the first balancing piece 21 from extending out of the rotor core 10; and / or, the length of the second balancing piece 22 is less than or equal to the length of the second balancing hole 12 to prevent the second balancing piece 22 from extending out of the rotor core 10; and / or, the length of the first balancing piece 21 is greater than the length of the second balancing piece 22, so that the motor rotor 100 can form a maximum eccentric torque, and under the condition of the maximum eccentric torque, the torque balance requirement of the motor rotor 100 is met.

[0041] Optionally, the first balancing hole 11 and the second balancing hole 12 both pass through both ends of the rotor core 10, so that when the first balancing piece 21 is not inserted in the first balancing hole 11 and the second balancing piece 22 is not inserted in the second balancing hole 12, the first balancing hole 11 and the second balancing hole 12 can also serve as channels for fluid circulation.

[0042] In order to make the first balancing piece 21 and the second balancing piece 22 stably embedded in the first balancing hole 11 and the second balancing hole 12 respectively, after the first balancing piece 21 and the second balancing piece 22 are respectively inserted into the first balancing hole 11 and the second balancing hole 12, the first balancing piece 21 and the second balancing piece 22 can be die-cast on the inner walls of the first balancing hole 11 and the second balancing hole 12 respectively by die-casting to prevent the first balancing piece 21 and the second balancing piece 22 from moving relative to the rotor core 10 during the rotation of the rotor core 10, and to make the overall structure of the motor rotor 100 more solid.

[0043] In this embodiment, if Figure 1 , Figure 2 and Figure 3As shown, the rotor core 10 is provided with a plurality of flow holes 13 for fluid circulation, and the plurality of flow holes 13 are arranged at intervals around the circumference of the rotor core 10, and each flow hole 13 runs through both ends of the rotor core 10. By providing the flow holes 13, the circulation area of ​​the refrigerant inside the compressor housing can be increased, the circulation path of the refrigerant can be improved, and the circulation resistance of the refrigerant inside the compressor can be reduced, thereby improving the overall circulation efficiency of the refrigerant. The compressor with the motor rotor is used in the air-conditioning unit, which is conducive to improving the refrigeration efficiency of the air-conditioning unit; in addition, the provision of the flow holes 13 can also reduce the impact of the high-pressure gas inside the compressor on the rotor, so as to reduce vibration and noise. Optionally, the cross-section of each flow hole 13 is an arc surface, and the cross-section of each flow hole 13 is the same in shape and size as the cross-section of the first balancing hole 11 and the cross-section of the second balancing hole 12. Preferably, the plurality of flow holes 13 are evenly arranged around the circumference of the rotor core 10.

[0044] In this embodiment, the motor rotor 100 further includes two baffles 30, which are respectively arranged at the two ends of the rotor core 10, and each baffle 30 is provided with a plurality of through holes 31, and the plurality of through holes 31 of each baffle 30 are connected with the plurality of circulation holes 13 in a one-to-one correspondence, so that the two ends of each circulation hole 13 are respectively connected with the corresponding through holes 31 of the two baffles 30. Optionally, both of the two baffles 30 are annular plates, and the outer peripheral walls of the two baffles 30 are flush with the outer peripheral wall of the rotor core 10, so that the overall structure of the motor rotor 100 is relatively compact and regular.

[0045] In order to realize the assembly between the two baffles 30 and the rotor core 10, a plurality of fastening holes 14 are opened on the rotor core 10, and the plurality of fastening holes 14 are arranged at intervals around the circumference of the rotor core 10, and each fastening hole 14 passes through both ends of the rotor core 10; a plurality of fixing holes 32 are provided on each baffle 30, and the plurality of fixing holes 32 of each baffle 30 are arranged one-to-one corresponding to the plurality of fastening holes 14, so that the two baffles 30 and the rotor core 10 are relatively fixed by fasteners penetrating the corresponding fastening holes 14 and the corresponding fixing holes 32 of the two baffles 30.

[0046] In this embodiment, the motor rotor 100 further includes a main balancing block 41 and a secondary balancing block 42, which are respectively arranged at the two ends of the rotor core 10; wherein the main balancing block 41 is arranged opposite to one end of the first balancing piece 21, and the secondary balancing block 42 is arranged opposite to one end of the second balancing piece 22. Even if the motor rotor 100 achieves a balanced torque under the joint action of the paired balancing pieces and the paired balancing blocks, compared with the prior art that only increases the balancing block to achieve a torque balance for the motor rotor of the compressor with a large eccentricity, when the balancing piece and the balancing block in the present application are used to achieve the same torque balance effect for the motor rotor 100 of the compressor with a large eccentricity, the motor rotor 100 has a smaller volume and a lighter weight, thereby making the overall volume of the compressor having the motor including the motor rotor 100 smaller, which can also solve the problem of the overall volume of the compressor being too large in the prior art; at the same time, it can also save manufacturing materials and manufacturing costs, and improve processing efficiency.

[0047] In addition, the reduction in the volume of the main balancing block 41 and the auxiliary balancing block 42 can reduce the windage loss of the motor, which is beneficial to improving the motor efficiency; and the reduction in the volume of the main balancing block 41 and the auxiliary balancing block 42 reduces the overall length of the motor rotor 100, which is beneficial to reducing the rotational inertia moment of the motor and improving the starting performance of the motor. The overall length of the motor rotor 100 is the length of the motor rotor 100 along its extension direction.

[0048] Specifically, the main balancing mass 41 and the auxiliary balancing mass 42 are respectively disposed on the two baffles 30 , so that the main balancing mass 41 and the auxiliary balancing mass 42 are disposed at both ends of the rotor core 10 through the corresponding baffles 30 .

[0049] Specifically, the main balancing block 41 and the auxiliary balancing block 42 are symmetrically arranged around the center line of the rotor core 10; the outer peripheral wall of the main balancing block 41 and the outer peripheral wall of the auxiliary balancing block 42 are flush with the outer peripheral wall of the corresponding baffle 30, that is, the outer peripheral wall of the main balancing block 41 and the outer peripheral wall of the auxiliary balancing block 42 are flush with the outer peripheral wall of the rotor core 10, so that the overall structure of the motor rotor 100 is more compact and regular.

[0050] Specifically, connecting holes are provided on the main balancing block 41 and the auxiliary balancing block 42, so that the above-mentioned fasteners are passed through the corresponding connecting holes on the main balancing block 41 and the auxiliary balancing block 42, so that the main balancing block 41 and the auxiliary balancing block 42 are relatively fixed to the two baffles 30.

[0051] Optionally, the main balance block 41 includes a first plate body and a second plate body, the first plate body is a flat plate structure, the second plate body is an arc-shaped plate structure, and the second plate body is arranged on the first plate body so that a step structure is formed between the inner wall surface of the second plate body and the plate surface of the first plate body close to the second plate body; wherein the inner wall surface of the second plate body is the wall surface on one side of its bending direction; and the connecting hole of the main balance block 41 is arranged on the first plate body.

[0052] The auxiliary balance block 42 includes a third plate body and a fourth plate body, the third plate body is a flat plate structure, the fourth plate body is an arc-shaped plate structure, and the fourth plate body is arranged on the third plate body so that a step structure is formed between the inner wall surface of the fourth plate body and the plate surface of the third plate body close to the fourth plate body; wherein the inner wall surface of the fourth plate body is the wall surface on one side of its bending direction; the connection hole of the auxiliary balance block 42 is arranged on the third plate body.

[0053] Specifically, the first balancing hole 11 and the second balancing hole 12 are arranged in pairs to form a balancing hole group, and there are multiple balancing hole groups, and the multiple balancing hole groups are arranged at intervals around the center line of the rotor core 10; the first balancing piece 21 and the second balancing piece 22 are arranged in pairs to form a balancing piece group, and there are multiple balancing piece groups, and the multiple balancing piece groups are arranged one-to-one with the multiple balancing hole groups, so that the first balancing piece 21 in each balancing piece group is inserted into the first balancing hole 11 in the corresponding balancing hole group, and the second balancing piece 22 in each balancing piece group is inserted into the second balancing hole 12 in the corresponding balancing hole group. Preferably, the multiple balancing hole groups are evenly arranged around the center line of the rotor core 10.

[0054] In this embodiment, the rotor core 10 is further provided with a plurality of magnetic steel holes 15 for inserting magnetic steels, and the plurality of magnetic steel holes 15 are arranged at intervals around the circumference of the rotor core 10. Optionally, there are two magnetic steel holes 15, and the two magnetic steel holes 15 are symmetrically arranged around the center line of the rotor core 10. Specifically, the magnetic steel hole 15 is a rectangular hole.

[0055] The present invention further provides a motor, which includes a motor rotor and a motor stator that cooperate with each other, and the motor rotor is the motor rotor 100 mentioned above.

[0056] The present invention further provides a compressor, which includes the above-mentioned motor having a motor rotor 100 .

[0057] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0058] In the motor rotor 100 of the present invention, the motor rotor 100 includes a rotor core 10, a first balancing piece 21 and a second balancing piece 22; the rotor core 10 is provided with a first balancing hole 11 and a second balancing hole 12, the first balancing piece 21 is inserted in the first balancing hole 11, and the second balancing piece 22 is inserted in the second balancing hole 12; that is, by providing the first balancing hole 11 and the second balancing hole 12 on the rotor core 10, and inserting the first balancing piece 21 and the second balancing piece 22 in the corresponding first balancing hole 11 and the second balancing hole 12 respectively, the motor rotor 100 achieves torque balance under the action of the first balancing piece 21 and the second balancing piece 22, compared with arranging a balancing block outside the rotor core 10 to balance the torque of the motor rotor, this structure of embedding the balancing piece in the rotor core 10 can not only play the role of balancing the torque, but also avoid the increase in the volume of the motor rotor 100, and also avoid the increase in the weight of the motor rotor 100, thereby avoiding the increase in the overall volume of the compressor; it can be seen that the motor rotor 100 can solve the problem of the overall volume of the compressor being too large in the prior art.

[0059] Moreover, the first balancing hole 11 and the second balancing hole 12 both extend along the extension direction of the rotor core 10; the first balancing hole 11 and the second balancing hole 12 are symmetrically arranged relative to the center line of the rotor core 10, so that the first balancing piece 21 inserted in the first balancing hole 11 and the second balancing piece 22 inserted in the second balancing hole 12 are symmetrically arranged relative to the center line of the rotor core 10. Compared with the asymmetrically arranged balancing hole structure, this symmetrically arranged balancing hole structure can make the air gap magnetic circuit of the motor having the motor rotor 100 symmetrical to form a symmetrical air gap magnetic density, so that the motor having the motor rotor 100 can generate a balanced magnetic torque to avoid unnecessary vibration and noise of the motor having the motor rotor 100.

[0060] The motor of the present invention includes a motor rotor 100 , so the motor has at least the same technical effect as the motor rotor 100 .

[0061] The compressor of the present invention includes the above-mentioned motor having the motor rotor 100 , so the compressor has at least the same technical effect as the motor rotor 100 .

[0062] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0063] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0064] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor rotor, characterized in that: include: A rotor core (10), wherein a first balancing hole (11) and a second balancing hole (12) are formed on the rotor core (10); a first balancing piece (21), the first balancing piece (21) being inserted into the first balancing hole (11); a second balancing piece (22), the second balancing piece (22) being inserted into the second balancing hole (12); Wherein, the first balancing hole (11) and the second balancing hole (12) both extend along the extension direction of the rotor core (10); the first balancing hole (11) and the second balancing hole (12) are arranged symmetrically with respect to the center line of the rotor core (10); The first balancing member (21) is a strip-shaped structure, and the cross section of the first balancing member (21) is an arc-shaped surface; the first balancing hole (11) is a strip-shaped hole, and the cross section of the first balancing hole (11) is an arc-shaped surface matching the cross section of the first balancing member (21); The second balancing member (22) is a strip-shaped structure, and the cross section of the second balancing member (22) is an arc-shaped surface; the second balancing hole (12) is a strip-shaped hole, and the cross section of the second balancing hole (12) is an arc-shaped surface matching the cross section of the second balancing member (22); Along the extension direction of the rotor core (10), the length of the first balancing piece (21) is less than or equal to the length of the first balancing hole (11), the length of the second balancing piece (22) is less than or equal to the length of the second balancing hole (12), and the length of the first balancing piece (21) is greater than the length of the second balancing piece (22); The rotor core (10) is provided with a plurality of flow holes (13) for fluid circulation, the plurality of flow holes (13) being arranged at intervals around the circumference of the rotor core (10), and each of the flow holes (13) passing through both ends of the rotor core (10); The motor rotor further comprises a main balancing block (41) and a secondary balancing block (42), wherein the main balancing block (41) and the secondary balancing block (42) are respectively arranged at two ends of the rotor core (10); the main balancing block (41) is arranged opposite to one end of the first balancing piece (21), and the secondary balancing block (42) is arranged opposite to one end of the second balancing piece (22).

2. The motor rotor according to claim 1, characterized in that: The motor rotor also includes: Two baffles (30), the two baffles (30) being respectively arranged at two ends of the rotor core (10), each of the baffles (30) being provided with a plurality of through holes (31), and the plurality of through holes (31) of each of the baffles (30) being connected to the plurality of flow holes (13) in a one-to-one correspondence.

3. The motor rotor according to claim 1, characterized in that: The main balancing block (41) and the auxiliary balancing block (42) are symmetrically arranged around the center line of the rotor core (10); the outer peripheral wall of the main balancing block (41) and the outer peripheral wall of the auxiliary balancing block (42) are both flush with the outer peripheral wall of the rotor core (10).

4. The motor rotor according to claim 1, characterized in that: The first balancing hole (11) and the second balancing hole (12) are arranged in pairs to form a balancing hole group, and the balancing hole group is multiple, and the multiple balancing hole groups are arranged at intervals around the center line of the rotor core (10); The first balancing piece (21) and the second balancing piece (22) are arranged in pairs to form a balancing piece group, and there are multiple balancing piece groups, and the multiple balancing piece groups are arranged in a one-to-one correspondence with the multiple balancing hole groups.

5. A motor, comprising a motor rotor and a motor stator that cooperate with each other, characterized in that: The motor rotor is the motor rotor according to any one of claims 1 to 4.

6. A compressor, comprising a motor, characterized in that: The motor is the motor described in claim 5.

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