Stator core and motor

Abstract

The utility model discloses a stator core and a motor, comprising a plurality of punching sheets which are sequentially and coaxially laminated, a plurality of special-shaped nozzles are respectively arranged on the surfaces of the punching sheets at two ends, and two corresponding nozzles on the two punching sheets at two ends are correspondingly communicated and form an oil path channel. A plurality of flowing grooves are formed in the side wall of each punching sheet at intervals, the flowing grooves in the different punching sheets are sequentially distributed in a staggered mode in the axis direction of the punching sheets, nozzles are not prone to being blocked, reliability is high, cooling is more uniform, and cooling efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a stator core and a motor. Background Technology

[0002] Currently, with the rapid development of the new energy vehicle industry, the requirements for motor power density are becoming increasingly stringent. Generally, the higher the motor power density, the greater the motor losses. To quickly dissipate these losses and prevent overheating and damage to the motor, a higher-performance cooling system needs to be designed. Therefore, this invention proposes a stator core and motor that features a simple structure, uses fewer types of silicon steel sheets, provides uniform cooling, high cooling efficiency, high reliability, and minimal impact on the motor's electromagnetic performance. Utility Model Content

[0003] The purpose of this invention is to provide a stator core and motor that are less prone to clogging of the nozzle, have high reliability, more uniform cooling, and high cooling efficiency.

[0004] According to the present invention, a stator core includes multiple laminations coaxially stacked in sequence. Multiple irregularly shaped nozzles are respectively opened on the surface of the laminations at both ends. The two corresponding nozzles on the two laminations at both ends are connected to each other to form an oil passage. Multiple flow grooves are spaced apart along the side wall of each lamination. The flow grooves on different laminations are distributed alternately along the axial direction of the laminations.

[0005] Furthermore, the iron core includes two first laminations, a second lamination, a plurality of third laminations, a second lamination, and two first laminations stacked coaxially in sequence.

[0006] Furthermore, the first lamination, the second lamination, and the third lamination have multiple coaxial weld beads on their sidewalls.

[0007] Furthermore, the third lamination has multiple protrusions spaced apart on its side, and a stop is provided between every two protrusions. The side of each protrusion is provided with a first platform, a ramp, and a second platform in sequence to the adjacent stop. The second platform is closer to the center of the third lamination than the first platform. The protrusions, the stop, the first platform, the ramp, and the second platform together form the flow groove.

[0008] Furthermore, the weld bead is formed on the top of the stop block.

[0009] Furthermore, the side of the protrusion is provided with a waist-shaped hole that communicates with the flow groove.

[0010] The present invention also provides an electric motor, including the stator core as described above. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the stator core structure according to an embodiment of the present invention.

[0012] Figure 2 This is a schematic diagram of the structure of the first lamination according to an embodiment of the present invention.

[0013] Figure 3 This is a schematic diagram of the structure of the second lamination according to an embodiment of the present invention.

[0014] Figure 4 for Figure 1 Enlarged view of the structure at point A in the middle.

[0015] Figure 5 This is a schematic diagram of the structure of the third lamination according to an embodiment of the present invention.

[0016] In the figure, 1-nozzle; 2-oil passage; 3-flow groove; 4-first punch; 5-second punch; 6-third punch; 7-weld; 8-protrusion; 9-stop; 10-first platform; 11-slope; 12-second platform; 13-waist-shaped hole. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] Combination Figures 1 to 5 A stator core includes multiple laminations coaxially stacked in sequence. Multiple irregularly shaped nozzles 1 are respectively opened on the surface of the laminations at both ends. The two corresponding nozzles 1 on the two laminations at both ends are connected to each other and form an oil passage 2. Multiple flow grooves 3 are spaced apart along the side wall of each lamination. The flow grooves 3 on different laminations are distributed alternately along the lamination axis.

[0019] The irregularly shaped nozzles on the laminations at the ends of the iron core not only prevent clogging and ensure high reliability, but also, the combination of the irregularly shaped nozzles on the laminations at the very end of the iron core and the rotation angle of the nozzles along the circumference of the motor can increase the spray area at the winding ends, resulting in more uniform cooling and higher cooling efficiency.

[0020] The iron core includes two first laminations 4, a second lamination 5, multiple third laminations 6, a second lamination 5, and two first laminations 4 stacked coaxially in sequence.

[0021] Multiple coaxial weld beads 7 are provided on the side walls of the first lamination 4, the second lamination 5, and the third lamination 6.

[0022] The entire stator core is composed of three types of laminations. Two types of laminations are used at the ends of the core, namely two first laminations 4 and one second lamination 5, while one type of lamination, namely the third lamination 6, is used in the middle. The reasons for using two types of laminations at the ends of the core are: 1. When one type of lamination rotates along the motor axis, the other type of lamination does not rotate, which can block the flow channel in the middle of the core and prevent coolant from leaking from the ends of the core through the gaps in the weld; 2. Compared with the structure using two types of laminations at the ends of the core, the number of nozzles on each lamination can be reduced, thereby reducing the adverse effects of the nozzles on electromagnetic performance.

[0023] The third lamination 6 has multiple protrusions 8 spaced apart on its side. A stop block 9 is provided between every two protrusions 8. A first platform 10, a ramp 11, and a second platform 12 are arranged sequentially on the side of the protrusion 8 toward the adjacent stop block 9. The second platform 12 is closer to the center of the third lamination 6 than the first platform 10. The protrusions 8, stop blocks 9, first platform 10, ramp 11, and second platform 12 together form a flow groove 3.

[0024] The top of the stop block 9 has a weld bead 7.

[0025] The side of the protrusion 8 has a waist-shaped hole 13 that communicates with the flow groove 3.

[0026] It is worth noting that all three types of laminations are designed with weld beads. After being stacked into a stator core, they can be welded together into a whole. The weld beads are through-type, resulting in good rigidity after welding.

[0027] The waist-shaped hole structure below the weld bead of the middle punch, i.e. the third punch, can connect the flow grooves on both sides of each weld bead.

[0028] The effective cross-sectional area of ​​the nozzle at the end of the iron core gradually increases from the inside of the iron core to the end of the iron core, forming a trumpet-shaped structure, which increases the spray area at the end of the winding, resulting in more uniform cooling and higher cooling efficiency.

[0029] By using the opening design on the non-rotating lamination at the end of the iron core, the nozzles within a 120° range near the bottom of the housing can be eliminated, resulting in better cooling.

[0030] The present invention also provides an electric motor, including the stator core as described above.

[0031] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A stator core, characterized in that, It includes multiple stampings that are coaxially stacked in sequence. Multiple irregularly shaped nozzles are respectively opened on the surface of the stampings at both ends. The two corresponding nozzles on the two stampings at both ends are connected to each other and form an oil passage. Multiple flow grooves are spaced apart along the side wall of each stamping. The flow grooves on different stampings are distributed alternately along the axial direction of the stampings.

2. The stator core according to claim 1, characterized in that, The iron core includes two first laminations, a second lamination, multiple third laminations, a second lamination, and two first laminations stacked coaxially in sequence.

3. The stator core according to claim 2, characterized in that, The first lamination, the second lamination, and the third lamination have multiple coaxial weld beads on their sidewalls.

4. The stator core according to claim 3, characterized in that, The third lamination has multiple protrusions spaced apart on its side, and a stop is provided between every two protrusions. The side of each protrusion is provided with a first platform, a ramp, and a second platform in sequence to the adjacent stop. The second platform is closer to the center of the third lamination than the first platform. The protrusions, the stop, the first platform, the ramp, and the second platform together form the flow groove.

5. The stator core according to claim 4, characterized in that, The weld bead is formed on the top of the stop block.

6. The stator core according to claim 5, characterized in that, The side of the protrusion has a waist-shaped hole that communicates with the flow channel.

7. An electric motor, characterized in that, Including the stator core as described in claim 6.

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