Motor rotor, motor

Abstract

The present invention provides a motor rotor and a motor, wherein the motor rotor includes a rotor core, the rotor core is provided with a magnetic steel slot that passes through both axial ends thereof, the magnetic steel slot is provided with a magnetic steel, a paint impregnation baffle and a sealing baffle are provided on one axial end of the rotor core, the paint impregnation baffle has a paint impregnation through hole that is connected to the magnetic steel slot and can form an axial stop for the magnetic steel, the sealing baffle is located on the side of the paint impregnation baffle away from the rotor core, and the sealing baffle can seal the paint impregnation through hole. According to the present invention, the magnetic steel slot and the magnetic steel can be fully impregnated with paint, thereby effectively preventing the magnetic steel from loosening when the motor rotor rotates, eliminating the noise generated by the loose magnetic steel and thus improving the reliability of the motor, and at the same time, after the paint impregnation process is completed, it is effectively prevented that foreign matter such as external iron filings and impurities are sucked into the magnetic steel, thereby eliminating the occurrence of electrical safety hazards.

Description

Technical Field

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

[0002] For high-speed motor built-in structure rotors, the magnets are usually inserted into the slots of the rotor punchings, and the axial ends are fixed and sealed with baffles, so that all the magnets are completely enclosed inside the punchings, thus isolating them from the external environment. This structure has an obvious disadvantage that it is not easy to dip in paint, which will inevitably cause a certain gap between the internal magnets and the magnet slots on the punchings. In this way, when the rotor is running at high speed, the internal magnets will easily loosen, which will cause very large vibration problems in severe cases, causing a sharp decline in the reliability of the rotor.

[0003] In order to ensure the paint impregnation effect on the magnet, the related art proposes a baffle structure with a flow hole, but the flow hole structure lacks a sealing structure and a magnet stop structure, the paint impregnation is insufficient, the magnet is easy to absorb foreign objects, and there is an electrical safety hazard. Summary of the invention

[0004] Therefore, the present invention provides a motor rotor and a motor, which can overcome the shortcomings of the related art such as insufficient paint dipping and easy absorption of foreign objects by the magnetic steel, which poses an electrical safety hazard.

[0005] In order to solve the above problems, the present invention provides a motor rotor, including a rotor core, wherein the rotor core is constructed with magnetic steel slots passing through its two axial ends, and magnetic steels are installed in the magnetic steel slots. A paint impregnation baffle and a sealing baffle are provided on one axial end of the rotor core, and the paint impregnation baffle has a paint impregnation through hole connected to the magnetic steel slot and can form an axial stop for the magnetic steel. The sealing baffle is located on the side of the paint impregnation baffle away from the rotor core, and the sealing baffle can seal the paint impregnation through hole.

[0006] In some embodiments, a stop rib is provided on the hole wall of the paint dipping through hole.

[0007] In some embodiments, the paint-impregnating through hole has a first radial width, the magnetic steel slot has a second radial width, the first radial width is greater than the second radial width, any plane perpendicular to the axis of the rotor core is a first plane, and projected onto the first plane, the radially opposite sides of the paint-impregnating through hole are respectively located on the outer sides of the radially opposite sides of the magnetic steel slot.

[0008] In some embodiments, the stop rib is located in the paint dipping through hole to divide the paint dipping through hole into two sub-through holes.

[0009] In some embodiments, a stop block is provided in the paint dipping hole, and the stop block is detachably located in the paint dipping hole so that when the paint dipping baffle and the sealing baffle are sequentially connected to the axial end of the rotor core, the stop block can be connected between the magnetic steel and the sealing baffle.

[0010] In some embodiments, when the stop rib divides the paint dipping through hole into two sub-through holes, there are a plurality of stop blocks, which are respectively located in the sub-through holes.

[0011] In some embodiments, the stop block and the sealing baffle are integrally formed.

[0012] In some embodiments, the motor rotor further includes a rotating shaft, and the sealing baffle and / or the varnish dipping baffle are heat-fitted onto the rotating shaft.

[0013] In some embodiments, at least the sealing baffle is provided at the other axial end of the rotor core.

[0014] The present invention also provides a motor, comprising the motor rotor mentioned above.

[0015] The present invention provides a motor rotor and a motor, wherein the paint dipping through hole on the paint dipping baffle can ensure that the outside is connected to the inside of the magnetic steel slot during the paint dipping process while preventing the magnetic steel from falling out, and the magnetic steel slot and the magnetic steel are fully paint-dipped, thereby effectively preventing the magnetic steel from loosening when the motor rotor rotates, eliminating the noise caused by the loose magnetic steel and thus improving the reliability of the motor, and at the same time, the sealing baffle can seal the paint dipping through hole, effectively preventing external iron filings and impurities from being sucked into the magnetic steel after the paint dipping process is completed, thereby eliminating the occurrence of electrical safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the internal structure of a motor rotor according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 The projection of the rotor core on the first plane;

[0018] Figure 3 for Figure 1 The projection of the paint dipping baffle on the first plane;

[0019] Figure 4 for Figure 1 A side view of an embodiment of a sealing baffle in FIG.

[0020] The reference numerals are as follows:

[0021] 1. Rotor core; 11. Magnetic steel slot; 2. Magnetic steel; 3. Paint dipping baffle; 31. Paint dipping through hole; 32. Stop rib; 4. Sealing baffle; 5. Stop block; 6. Rotating shaft. DETAILED DESCRIPTION

[0022] See also Figures 1 to 4 As shown, according to an embodiment of the present invention, there is provided a motor rotor, including a rotor core 1, the rotor core 1 is constructed with magnetic steel slots 11 passing through its two axial ends, the magnetic steel slots 11 are provided with magnetic steels 2, a paint impregnation baffle 3 and a sealing baffle 4 are provided on one axial end of the rotor core 1, the paint impregnation baffle 3 has a paint impregnation through hole 31 connected to the magnetic steel slots 11 and can form an axial stop for the magnetic steel 2, the sealing baffle 4 is located on the side of the paint impregnation baffle 3 away from the rotor core 1, and the sealing baffle 4 can seal the paint impregnation through hole 31. In this technical solution, the paint dipping hole 31 on the paint dipping baffle 3 can ensure that the outside is connected to the inside of the magnetic steel slot 11 during the paint dipping process while preventing the magnetic steel 2 from falling out. The magnetic steel slot 11 and the magnetic steel 2 are fully paint-dipped, thereby effectively preventing the magnetic steel 2 from loosening when the motor rotor rotates, eliminating the noise generated by the loosening of the magnetic steel 2 and thus improving the reliability of the motor. At the same time, the sealing baffle 4 can seal the paint dipping hole 31, effectively preventing external iron filings and impurities from being sucked into the magnetic steel after the paint dipping process is completed, thereby eliminating the occurrence of electrical safety hazards.

[0023] In some embodiments, the paint dipping hole 31 has a first radial width (i.e., along the radial direction of the rotor core 1, the same below), the magnetic steel slot 11 has a second radial width, the first radial width is greater than the second radial width, any plane perpendicular to the axis of the rotor core 1 is a first plane, and projected on the first plane, the radially opposite sides of the paint dipping hole 31 are respectively located on the outer sides of the radially opposite sides of the magnetic steel slot 11, thereby ensuring that the fitting clearance between the magnetic steel 2 and the magnetic steel slot 11 is fully exposed during the paint dipping process, thereby ensuring the paint dipping effect.

[0024] A stop rib 32 is provided on the hole wall of the paint dipping hole 31. The stop rib 32 can be, for example, a protruding structure provided on the hole wall of the paint dipping hole 31 and extending toward the inner side of the hole. This method can achieve effective stopping of one axial end of the magnetic steel 2. As a more preferred implementation method, the stop rib 32 is located in the paint dipping hole 31 to divide the paint dipping hole 31 into two sub-holes, that is, the two ends of the stop rib 32 are respectively located on the opposite sides of the paint dipping hole 31, thereby enhancing the structural strength of the paint dipping hole 31.

[0025] In some embodiments, the paint-impregnating through hole 31 has a stop block 5, and the stop block 5 is detachably located in the paint-impregnating through hole 31, so that when the paint-impregnating baffle 3 and the sealing baffle 4 are sequentially connected to the axial end of the rotor core 1, the stop block 5 is connected between the magnetic steel 2 and the sealing baffle 4. In this technical solution, the stop block 5 can provide axial support for the area corresponding to the magnetic steel 2 and the paint-impregnating through hole 31, further improving the axial restraint effect of the magnetic steel 2, and the support is more stable. At the same time, the size of the stop rib 32 can be designed to be smaller, so that the flow area of ​​the paint-impregnating through hole 31 can be designed to be larger, which is conducive to further improving the paint-impregnating effect. When the stop rib 32 divides the paint-impregnating through hole 31 into two sub-through holes, the stop block 5 has multiple and is respectively located in the sub-through holes.

[0026] In some embodiments, the stop block 5 and the sealing baffle 4 are integrally formed to facilitate assembly.

[0027] In some embodiments, the motor rotor further includes a rotating shaft 6 , the rotor core 1 is sleeved on (eg, heat-fitted) the rotating shaft 6 , and the sealing baffle 4 and / or the varnishing baffle 3 are heat-fitted on the rotating shaft 6 .

[0028] In some embodiments, at least the sealing baffle 4 is provided at the other axial end of the rotor core 1. Of course, it is best that the other axial end is also provided with a paint dipping baffle 3, so that the axial ends of the magnetic steel slot 11 of the rotor core 1 are connected during the paint dipping process, which is beneficial to the smooth flow of the paint liquid in the magnetic steel slot 11 and improves the paint dipping effect.

[0029] During the specific assembly, the sealing baffle 4 at the other axial end of the rotor core 1 and the rotor core 1 are first heat-fitted onto the rotating shaft 6. After cooling, all the magnetic steels 2 are filled into the magnetic steel slots 11, and then the paint baffle 3 is heat-fitted. After cooling again, the entire assembled rotor is placed in a paint tank for paint dipping, and then dried. Finally, the sealing baffle 4 at one axial end of the rotor core 1 is heat-fitted onto the rotating shaft 6 to complete the sealing of the magnetic steel 2, prevent it from being directly exposed to the air, and prevent foreign matter from being sucked in. As for the thickness of the paint baffle 3 and the sealing baffle 4, there is no special restriction, and it can be suitable.

[0030] According to an embodiment of the present invention, there is further provided a motor, comprising the motor rotor described above.

[0031] It is easy for those skilled in the art to understand that the above-mentioned advantageous methods can be freely combined and superimposed without conflict.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A motor rotor, characterized in that: The invention comprises a rotor core (1), wherein the rotor core (1) is provided with a magnetic steel slot (11) penetrating through both axial ends thereof, a magnetic steel (2) is installed in the magnetic steel slot (11), and a paint impregnation baffle (3) and a sealing baffle (4) are provided on one axial end of the rotor core (1), wherein the paint impregnation baffle (3) has a paint impregnation through hole (31) communicating with the magnetic steel slot (11) and can form an axial stop for the magnetic steel (2), and the sealing baffle (4) is located on a side of the paint impregnation baffle (3) away from the rotor core (1), and the sealing baffle (4) can seal the paint impregnation through hole (31); a stop rib (32) is provided on the hole wall of the paint dipping hole (31); the paint dipping hole (31) has a first radial width, the magnetic steel slot (11) has a second radial width, the first radial width is greater than the second radial width, any plane perpendicular to the axis of the rotor core (1) is a first plane, and projected on the first plane, the radially opposite sides of the paint dipping hole (31) are respectively located on the outer sides of the radially opposite sides of the magnetic steel slot (11); the stop rib (32) is located in the paint dipping hole (31) to divide the paint dipping hole (31) into two sub-holes.

2. The motor rotor according to claim 1, characterized in that: The paint dipping through hole (31) has a stop block (5) therein. The stop block (5) is detachably located in the paint dipping through hole (31) so as to be able to abut and connect between the magnetic steel (2) and the sealing baffle (4) when the paint dipping baffle (3) and the sealing baffle (4) are sequentially connected to the axial end of the rotor core (1).

3. The motor rotor according to claim 2, characterized in that: When the stop rib (32) divides the paint-immersing through hole (31) into two sub-through holes, the stop blocks (5) are provided in plurality and are respectively located in the sub-through holes.

4. The motor rotor according to claim 2, characterized in that: The stop block (5) and the sealing baffle (4) are integrally formed.

5. The motor rotor according to claim 1, characterized in that: It also comprises a rotating shaft (6), on which the sealing baffle (4) and / or the varnishing baffle (3) are heat-fitted.

6. The motor rotor according to claim 1, characterized in that: At least the sealing baffle (4) is provided at the other axial end of the rotor core (1).

7. A motor, characterized in that: A motor rotor comprising the motor rotor according to any one of claims 1 to 6.

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