Motor rotor punching sheet

Abstract

The utility model relates to a motor rotor punching sheet which comprises a punching sheet body, magnetic steel installation grooves are symmetrically formed in the two opposite ends of the outer circle edge of the punching sheet body, winding grooves are symmetrically formed in the two opposite ends of the outer circle edge of the punching sheet body, the winding grooves are located between the magnetic steel installation grooves, and partition blocks are arranged in the middles of the winding grooves. The partition block comprises a left partition strip and a right partition strip which are symmetrically arranged, a heat dissipation groove is formed between the left partition strip and the right partition strip, and an inner heat dissipation air channel and an outer heat dissipation air channel which are spaced and communicated are arranged in the heat dissipation groove. The motor rotor punching sheet can overcome the defects that a traditional motor rotor punching sheet is relatively poor in heat dissipation effect, and motor power is reduced due to long-time use.

Description

Technical Field

[0001] This application relates to the field of motor rotors, and more particularly to a motor rotor lamination. Background Technology

[0002] A typical motor rotor is formed by stacking multiple layers / sheets of motor rotor laminations. Under normal circumstances, the thickness of motor rotor laminations is relatively thin, which facilitates both manufacturing and maintenance.

[0003] Currently, a more traditional motor rotor lamination, such as the 5-9KW small synchronous generator motor rotor lamination disclosed in Chinese Patent Publication No. CN220964435U, has winding grooves on both sides of the rotor lamination body, and a partition block between the winding grooves. The partition block is U-shaped, and magnet mounting grooves are symmetrically arranged at opposite ends of the outer circle of the lamination body.

[0004] However, the inventor believes that although this type of motor rotor lamination has a certain heat dissipation function, it will lead to a certain reduction in the power of the motor after long-term use. Therefore, the inventor believes that there is still room for improvement. Utility Model Content

[0005] In order to improve the shortcomings of traditional motor rotor laminations, which have relatively poor heat dissipation and lead to a decrease in motor power after long-term use.

[0006] This application provides a motor rotor lamination, which adopts the following technical solution:

[0007] A motor rotor lamination includes a lamination body. Magnet mounting slots are symmetrically arranged at opposite ends of the outer circular edge of the lamination body. Winding slots are symmetrically arranged at opposite ends of the outer circular edge of the lamination body and are located between the magnet mounting slots. A partition is provided in the middle of the winding slot. The partition includes a left partition bar and a right partition bar arranged symmetrically. A heat dissipation groove is formed between the left partition bar and the right partition bar. An internal heat dissipation air duct and an external heat dissipation air duct are provided in the heat dissipation groove, which are spaced apart and connected.

[0008] In some embodiments, the middle of both the left and right partitions is symmetrically provided with a central blocking protrusion facing into the heat dissipation groove. The central blocking protrusion divides the heat dissipation groove into an inner heat dissipation airway and an outer heat dissipation airway, and a transition airway connecting the inner and outer heat dissipation airways is formed between the two central blocking protrusions.

[0009] In some embodiments, when multiple layers of the lamination body are stacked, the middle barrier protrusions at corresponding positions of all layers are aligned.

[0010] In some embodiments, when multiple layers of the lamination bodies are stacked, the corresponding middle barrier protrusions form a V-shaped cross section or form a middle barrier band inclined in the same direction.

[0011] In some embodiments, the distance between the inner sides of the left and right partition bars gradually increases from the bottom of the heat dissipation groove to the opening of the groove.

[0012] In some embodiments, the inner sides of the left and right partitions are respectively provided with external blocking protrusions symmetrically at the opening of the heat dissipation groove.

[0013] In some embodiments, an arc-shaped protrusion is provided in the center of the bottom of the heat dissipation groove.

[0014] In some embodiments, the outer edges of both the left and right partitions are provided with outwardly extending protrusions.

[0015] In some embodiments, the spacing between the outwardly extending protrusions is no greater than one-third of the spacing at the opening of the winding groove.

[0016] In summary, this application includes at least one of the following beneficial technical effects: by improving the partition of the winding slot, the product can have better ventilation and heat dissipation during use, and can increase the power to a certain extent on the basis of the traditional structure. This also makes the power of the motor with this product remain at a relatively good level after long-term use, and the operation stability is also improved to a certain extent. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a motor rotor lamination in an embodiment of this application.

[0018] Figure 2 This is a front structural diagram of a motor rotor lamination in an embodiment of this application.

[0019] Figure 3 This application provides a cross-sectional view of the multi-layer motor rotor lamination stacked in an embodiment.

[0020] Explanation of reference numerals in the attached drawings: 1. Lamination body; 2. Magnet mounting groove; 3. Winding groove; 4. Left spacer; 5. Right spacer; 6. Outer extension protrusion; 7. Outer barrier protrusion; 8. Inner heat dissipation duct; 9. Outer heat dissipation duct; 10. Middle barrier protrusion; 11. Transition duct; 12. Arc-shaped protrusion; 13. Middle barrier strip. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1 to 3 This application will be described in further detail.

[0022] This application discloses a motor rotor lamination, referring to... Figure 1The device includes a lamination body 1, with magnet mounting grooves 2 symmetrically arranged at opposite ends of the outer circular edge of the lamination body 1, and winding grooves 3 symmetrically arranged at opposite ends of the outer circular edge of the lamination body 1, with the winding grooves 3 located between the magnet mounting grooves 2, and a partition block arranged in the middle of the winding grooves 3.

[0023] Reference Figure 2 The partition includes a symmetrically arranged left partition 4 and a right partition 5. The outer edges of both the left and right partitions 4 and 5 are provided with outwardly extending protrusions 6. The setting of the outwardly extending protrusions 6 ensures the installation stability of the winding. Under normal circumstances, the distance between the outwardly extending protrusions 6 is no more than one-third of the distance at the opening of the winding groove 3. This can maximize the installation space of the winding. A heat dissipation groove is formed between the left partition 4 and the right partition 5. The inner edges of the left and right partitions 4 and 5 are respectively provided with symmetrically arranged outwardly blocking protrusions 7 at the opening of the heat dissipation groove. This can make the airflow more concentrated.

[0024] To improve heat dissipation and ensure increased motor power and operational stability, an internal heat dissipation duct 8 and an external heat dissipation duct 9 are provided within the heat dissipation slot, and their structures are as follows:

[0025] The middle of both the left partition 4 and the right partition 5 is symmetrically provided with a middle blocking protrusion 10 facing into the heat dissipation groove. The middle blocking protrusion 10 divides the heat dissipation groove into an inner heat dissipation air channel 8 and an outer heat dissipation air channel 9. A transition air channel 11 connecting the inner heat dissipation air channel 8 and the outer heat dissipation air channel 9 is formed between the two middle blocking protrusions 10. In order to make the heat dissipation effect more prominent, the distance between the inner sides of the left partition 4 and the right partition 5 can be gradually increased from the bottom of the heat dissipation groove to the opening of the groove. This makes the air in the two air channels of the inner heat dissipation air channel 8 and the outer heat dissipation air channel 9 form a siphon effect during the heat dissipation process, so that the air can carry away the heat more quickly. At the same time, in order to divert and diffuse the heat of the inner heat dissipation air channel 8, an arc-shaped protrusion 12 is provided in the middle of the bottom of the heat dissipation groove in this embodiment.

[0026] When the multi-layer stamping body 1 is stacked, the corresponding middle barrier protrusions 10 of all layers are aligned and set; refer to Figure 3 Another type of structure is formed by stacking multiple layers of stamped bodies 1. When multiple layers of stamped bodies 1 are stacked, the corresponding middle barrier protrusions 10 form a V-shaped cross section or form a middle barrier band 13 that is inclined in the same direction.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A motor rotor lamination, comprising a lamination body (1), wherein magnet mounting grooves (2) are symmetrically arranged at opposite ends of the outer circumference of the lamination body (1), and winding grooves (3) are symmetrically arranged at opposite ends of the outer circumference of the lamination body (1), wherein the winding grooves (3) are located between the magnet mounting grooves (2), characterized in that, A partition is provided in the middle of the winding groove (3). The partition includes a left partition (4) and a right partition (5) arranged symmetrically. A heat dissipation groove is formed between the left partition (4) and the right partition (5). An internal heat dissipation air duct (8) and an external heat dissipation air duct (9) are provided in the heat dissipation groove, which are spaced apart and connected.

2. An electrical machine rotor lamination according to claim 1, characterized in that The middle of the left partition (4) and the right partition (5) are symmetrically provided with a middle blocking protrusion (10) facing the heat dissipation groove. The middle blocking protrusion (10) divides the heat dissipation groove into an inner heat dissipation air channel (8) and an outer heat dissipation air channel (9). A transition air channel (11) connecting the inner heat dissipation air channel (8) and the outer heat dissipation air channel (9) is formed between the two middle blocking protrusions (10).

3. An electrical machine rotor lamination according to claim 2, characterized in that When the multiple layers of the stamped body (1) are stacked, the middle barrier protrusions (10) at corresponding positions of all layers are aligned.

4. An electrical machine rotor lamination according to claim 2, characterized in that When the multiple layers of the lamination body (1) are stacked, the corresponding middle barrier protrusions (10) form a V-shaped cross section or form a middle barrier band (13) that is inclined in the same direction.

5. An electrical machine rotor lamination according to claim 1, characterized in that The distance between the inner sides of the left partition (4) and the right partition (5) gradually increases from the bottom of the heat dissipation groove to the opening of the groove.

6. An electrical machine rotor lamination according to claim 1, characterized in that The inner sides of the left partition (4) and the right partition (5) are respectively provided with external blocking protrusions (7) symmetrically at the opening of the heat dissipation groove.

7. An electrical machine rotor lamination according to claim 1, characterized in that An arc-shaped protrusion (12) is provided in the middle of the bottom of the heat dissipation groove.

8. An electrical machine rotor lamination according to claim 1, characterized in that The outer sides of both the left partition (4) and the right partition (5) are provided with outwardly extending protrusions (6) extending outwards.

9. An electrical machine rotor lamination according to claim 8, characterized in that The spacing between the outer extension protrusions (6) is no greater than one-third of the spacing at the opening of the winding groove (3).

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